20240705IPC to ICIP No. 8 Attachment 1 - Combined.pdf

Gust, Stacy
From: Nordstrom, Lisa
Sent: Wednesday, February 14, 2024 5:00 PM
To: Chris Burdin;Terri Carlock;Taylor Thomas; Donn English; Mike Louis; Chris McEwan;
[e-mail]; Brad Heusinkveld; Diego Rivas; Peter Richardson; Don
Reading; Travis Culbertson; kelsey; [e-mail]; Courtney
White; Darrell Early; Ed Jewell;Wil Gehl; Anderson, Paige; Meier, Peter E.;
[e-mail];Tom Arkoosh; Erin Cecil; [e-mail];
[e-mail]; Thor Nelson; Austin W.Jensen;Austin Rueschhoff; Adele Lee;
Chelsey L. Moser;[e-mail]; [e-mail];
[e-mail]; [e-mail]
Cc: Walker, Donovan; Goicoechea Allen, Megan;Tatum,Tim; Larkin, Matt; Aschenbrenner,
Connie
Subject: Upcoming Idaho Power rate proceeding (Case No. IPC-E-24-07)
Attachments: Idaho Power Company's Notice of Intent.pdf
Dear Case No. IPC-E-23-11 Parties,
Today Idaho Power filed a Notice of Intent to File a General Rate Case pursuant to Idaho Public Utilities Commission Rule
of Procedure 122. The Company would like to gather together those parties who participated in its 2023 general rate
case to discuss a procedural path forward for this upcoming case (docketed as IPC-E-24-07), including the potential
merits of a limited issue rate proceeding as an alternative to a general rate case.
Please expect to see communication from Idaho Power in the coming days to identify a time when this discussion can
occur.
Best,
Lisa Nordstrom
LEAD COUNSEL
Idaho Power I Legal
Office 208-388-5825 1 Mobile [phone]
1121 W. Idaho St.I Boise, ID 1 83702
1

I[aAHOPOWER,
Timothy E.Tatum
Vice President
Regulatory Affairs
February 14, 2024
VIA ELECTRONIC FILING
Monica Barrios-Sanchez, Secretary
Idaho Public Utilities Commission
11331 W. Chinden Blvd., Bldg 8,
Suite 201-A (83714)
PO Box 83720
Boise, Idaho 83720-0074
Re: I PC-E-24-07
Notice of Intent to File a General Rate Case or Limited Issue Rate Proceeding
Dear Ms. Barrios-Sanchez:
Pursuant to Rule 122 of the Commission's Rules of Practice and Procedure, Idaho
Power Company herewith gives notice of its intent to file a General Rate Case or limited issue
rate proceeding on or after June 1, 2024.
Notice has been distributed to parties listed below. Please advise if there should be
other parties added to this distribution.
If you have any questions regarding the proposed filing, please contact me at (208) 388-
5515.
Sincerely,
7�� ��-
Timothy E. Tatum
TET/sg
cc: Dayn Hardie, Deputy Attorney General
Terri Carlock
P.O.Box 70(83707)
1221 W.Idaho St.
Boise,ID 83702

Gust, Stacy
From: Gust, Stacy
Sent: Wednesday, February 14, 2024 4:46 PM
To: Monica Barrios-Sanchez; '[e-mail]'
Cc: Tatum, Tim; Nordstrom, Lisa; Dayn Hardie; Terri Carlock
Subject: IPC-E-24-07 Idaho Power Company's Notice of Intent to File a General Rate Case or
Limited Issue Rate Proceeding
Attachments: Idaho Power Company's Notice of Intent.pdf
Ms. Barrios-Sanchez,
Please find attached for electronic filing Idaho Power Company's Notice of Intent to File a General Rate Case or limited
issue rate proceeding in regard to the above matter.
If you have any questions regarding this filing, please contact me.
Thank you.
Stacy Gust
Regulatory Administrative Assistant
Idaho Power I Regulatory Affairs
Office 208-388-5749
[e-mail]
1

NOR POWER,
Timothy E.Tatum
Vice President
Regulatory Affairs
February 14, 2024
VIA ELECTRONIC FILING
Monica Barrios-Sanchez, Secretary
Idaho Public Utilities Commission
11331 W. Chinden Blvd., Bldg 8,
Suite 201-A (83714)
PO Box 83720
Boise, Idaho 83720-0074
Re: I PC-E-24-07
Notice of Intent to File a General Rate Case or Limited Issue Rate Proceeding
Dear Ms. Barrios-Sanchez:
Pursuant to Rule 122 of the Commission's Rules of Practice and Procedure, Idaho
Power Company herewith gives notice of its intent to file a General Rate Case or limited issue
rate proceeding on or after June 1, 2024.
Notice has been distributed to parties listed below. Please advise if there should be
other parties added to this distribution.
If you have any questions regarding the proposed filing, please contact me at (208) 388-
5515.
Sincerely,
7�� ��
Timothy E. Tatum
TET/sg
cc: Dayn Hardie, Deputy Attorney General
Terri Carlock
P.O.Box 70(83707)
1221 W.Idaho St.
Boise,ID 83702

Gust, Stacy
From: Peter Richardson <[e-mail]>
Sent: Tuesday, February 20, 2024 2:43 PM
To: Nordstrom, Lisa
Subject: [EXTERNAL] RE: Availability to Discuss IPC-E-24-07 Rate Proceeding
KEEP IDAHO POWER SECURE! External emails may request information or contain malicious links or attachments.Verify the
sender before proceeding, and check for additional warning messages below.
Lisa, I am o.k. for these suggested times. -Pete
Peter Richardson
515 N. 27"St.
Boise, ID 83702
[phone]m (direct dial)
[phone] (cell)
From: Nordstrom, Lisa <[e-mail]>
Sent:Tuesday, February 20, 2024 1:49 PM
To: Chris Burdin <[e-mail]>; [e-mail]; Diego Rivas<[e-mail]>;
[e-mail]; Peter Richardson <[e-mail]>; kelsey<[e-mail]>; Darrell Early
<[e-mail]>; Ed Jewell <[e-mail]>; Meier, Peter E. <[e-mail]>;Tom
Arkoosh <[e-mail]>;Thor Nelson <[e-mail]>; Austin W.Jensen
<AWJensen@hol land hart.com>; Austin Rueschhoff<[e-mail]>; Matthew Nykiel
<[e-mail]>; Eric L. Olsen ([e-mail]) <[e-mail]>; Norman M. Semanko
<[e-mail]>;[e-mail]
Cc: Goicoechea Allen, Megan <[e-mail]>; Walker, Donovan <DWalker@ Ida hopower.com>
Subject:Availability to Discuss IPC-E-24-07 Rate Proceeding
Good afternoon counsel,
Following up on last week's email to parties in Case No. IPC-E-23-11, Idaho Power Company would like to schedule an
online discussion concerning the rate filing to be made Case No. IPC-E-24-07-- including the potential merits of a limited
issue rate proceeding as an alternative to a general rate case.
Please indicate your party's availability at these times during the week of March 41" using this link to View/vote in
browser:
• March 4 at 4-5 pm MST
• March 5 at 1:30—2:30 pm MST
• March 6 at 3—4 pm MST
• March 7 at 10-11 am MST
• March 7 at 4-5 pm MST
If you have any problems, please contact me and I'll send out a different link.
Thank you in advance for your assistance,
i

Lisa Nordstrom
LEAD COUNSEL
Idaho Power I Legal
Office 208-388-5825 1 Mobile [phone]
1121 W. Idaho St.I Boise, ID 183702
IDAHO POWER LEGAL DISCLAIMER
This transmission may contain information that is privileged, confidential and/or exempt from disclosure under
applicable law. If you are not the intended recipient,you are hereby notified that any disclosure, copying, distribution,
or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED. If you received this
transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in
electronic or hard copy format.Thank you.
z

Gust, Stacy
From: Nordstrom, Lisa
Sent: Friday, February 23, 2024 1:16 PM
To: Chris Burdin;Terri Carlock;Taylor Thomas; Donn English; Mike Louis; Chris McEwan;
[e-mail]; Brad Heusinkveld; Diego Rivas; Peter Richardson; Don
Reading; Travis Culbertson; kelsey; [e-mail]; Courtney
White; Darrell Early; Ed Jewell;Wil Gehl; Anderson, Paige; Meier, Peter E.;
[e-mail];Tom Arkoosh; Erin Cecil; [e-mail];
[e-mail]; Thor Nelson; Austin W.Jensen;Austin Rueschhoff; Adele Lee;
[e-mail]; [e-mail];[e-mail];
[e-mail]
Cc: Goicoechea Allen, Megan; Tatum, Tim; Larkin, Matt;Aschenbrenner, Connie;Walker,
Donovan
Subject: RE: Upcoming Idaho Power rate proceeding (Case No. IPC-E-24-07)
Good afternoon,
All responses received indicated availability on March 7 at 4-5pm MST, so please expect to see a meeting invitation
shortly for this date/time.
Best,
Lisa Nordstrom
LEAD COUNSEL
Office 208-388-5825 1 Mobile [phone]
From: Nordstrom, Lisa
Sent:Wednesday, February 14, 2024 5:00 PM
To: Chris Burdin <[e-mail]>; Terri Carlock<[e-mail]>;Taylor Thomas
<[e-mail]>; Donn English<[e-mail]>; Mike Louis
<[e-mail]>; Chris McEwan <[e-mail]>; [e-mail]; Brad
Heusinkveld <[e-mail]>; Diego Rivas<[e-mail]>; Peter Richardson
<peter@ rich ardsonadams.com>; Don Reading<[e-mail]>;Travis Culbertson
<[e-mail]>; kelsey<[e-mail]>; [e-mail]; Courtney
White<[e-mail]>; Darrell Early<[e-mail]>; Ed Jewell
<[e-mail]>; Wil Gehl<[e-mail]>; Anderson, Paige<[e-mail]>; Meier,
Peter E. <[e-mail]>; detheridge@ exeterassociates.com; Tom Arkoosh <[e-mail]>;
Erin Cecil <[e-mail]>; [e-mail]; [e-mail];Thor Nelson
<[e-mail]>; Austin W.Jensen <[e-mail]>; Austin Rueschhoff
<[e-mail]>; Adele Lee<ACLee@hol land hart.com>; Chelsey L. Moser
<[e-mail]>;[e-mail]; [e-mail];[e-mail];
[e-mail]
Cc: Walker, Donovan <DWalker@ Ida hopower.com>; Goicoechea Allen, Megan <[e-mail]>;
Tatum,Tim <[e-mail]>; Larkin, Matt<[e-mail]>; Aschenbrenner, Connie
<[e-mail]>
Subject: Upcoming Idaho Power rate proceeding (Case No. IPC-E-24-07)
Dear Case No. IPC-E-23-11 Parties,
1

Today Idaho Power filed a Notice of Intent to File a General Rate Case pursuant to Idaho Public Utilities Commission Rule
of Procedure 122. The Company would like to gather together those parties who participated in its 2023 general rate
case to discuss a procedural path forward for this upcoming case (docketed as IPC-E-24-07), including the potential
merits of a limited issue rate proceeding as an alternative to a general rate case.
Please expect to see communication from Idaho Power in the coming days to identify a time when this discussion can
occur.
Best,
Lisa Nordstrom
LEAD COUNSEL
Idaho Power I Legal
Office 208-388-5825 1 Mobile [phone]
1121 W. Idaho St.I Boise, ID 1 83702
2

Gust, Stacy
Subject: IPC-E-24-07 proceeding discussion
Location: Microsoft Teams Meeting
Start: Thu 3/7/2024 4:00 PM
End: Thu 3/7/2024 5:00 PM
Show Time As: Tentative
Recurrence: (none)
Meeting Status: Not yet responded
Organizer: Nordstrom, Lisa
Required Attendees: Chris Burdin;Terri Carlock;Taylor Thomas; Donn English; Mike Louis; Chris McEwan;
[e-mail]; Brad Heusinkveld; Diego Rivas; Peter Richardson; Don
Reading; Travis Culbertson; kelsey; [e-mail]; Courtney
White; Darrell Early; Ed Jewell;Wil Gehl; Anderson, Paige; Meier, Peter E.;
[e-mail];Tom Arkoosh; Erin Cecil; [e-mail];
[e-mail]; Thor Nelson; Austin W.Jensen;Austin Rueschhoff; Adele Lee;
[e-mail]; [e-mail];[e-mail];
[e-mail]; Goicoechea Allen, Megan;Tatum,Tim; Larkin, Matt;
Aschenbrenner, Connie;Walker, Donovan
Idaho Power Company has filed a Notice of Intent to File a General Rate Case pursuant to Idaho Public Utilities
Commission Rule of Procedure 122. The Company would like to gather together those parties who participated in its
2023 general rate case to discuss a procedural path forward for this upcoming case (docketed as IPC-E-24-07), including
the potential merits of a limited issue rate proceeding as an alternative to a general rate case, and hopes your
organization can attend.
Microsoft Teams Need help?
Join the meeting now
Meeting ID: 231 822 549 323
Passcode: 3xWT5K
Dial-in by phone
[phone]„356025582# United States, Boise
Find a local number
Phone conference ID: 356 025 582#
Join on a video conferencing device
i

Tenant key: [e-mail]
Video ID: 116 255 017 2
More info
For organizers: Meeting options Reset dial-in PIN
2

Gust, Stacy
From: Nordstrom, Lisa
Sent: Friday, March 8, 2024 2:07 PM
To: Chris Burdin;Terri Carlock;Taylor Thomas; Donn English; Mike Louis; Chris McEwan;
[e-mail]; Brad Heusinkveld; Diego Rivas; Peter Richardson; Don
Reading; Travis Culbertson; kelsey; [e-mail]; Courtney
White; Darrell Early; Ed Jewell;Wil Gehl; Anderson, Paige; Meier, Peter E.;
[e-mail];Tom Arkoosh; Erin Cecil; [e-mail];
[e-mail]; Thor Nelson; Austin W.Jensen;Austin Rueschhoff; Adele Lee;
[e-mail]; [e-mail];[e-mail];
[e-mail]
Cc: Goicoechea Allen, Megan; Tatum, Tim; Larkin, Matt;Aschenbrenner, Connie;Walker,
Donovan
Subject: Slides re: Upcoming Idaho Power rate proceeding (Case No. IPC-E-24-07)
Good afternoon,
Idaho Power appreciates the broad participation in yesterday's discussion about the possible structure of a future rate
case filing in Case No. IPC-E-24-07. As part of that discussion, the Company was asked to share the discussion slide deck
to facilitate the requested feedback to Idaho Power. Idaho Power is happy to do so if those who wish to receive a copy
will affirm that they will keep the sensitive information contained in the slide deck confidential and not share it with
third parties.
If you wish to receive a copy of the slide deck, please send your confidentiality affirmation to me and I will send it to you
directly.
Best,
Lisa
Lisa Nordstrom
LEAD COUNSEL
Idaho Power I Legal
Office 208-388-5825 1 Mobile [phone]
1121 W. Idaho St.I Boise, ID 1 83702
1

Gust, Stacy
From: Terri Carlock <[e-mail]>
Sent: Tuesday, March 19, 2024 4:30 PM
To: Nordstrom, Lisa; Chris Burdin; Taylor Thomas; Donn English; Mike Louis; Chris McEwan;
[e-mail]; Brad Heusinkveld; Diego Rivas; Peter Richardson; Don
Reading; kelsey; [e-mail]; Courtney White; Darrell Early; Ed
Jewell; Wil Gehl;Anderson, Paige; Meier, Peter E.; [e-mail];
Tom Arkoosh; Erin Cecil; [e-mail]; [e-mail]; Thor Nelson;
Austin W.Jensen; Austin Rueschhoff;Adele Lee;[e-mail];
[e-mail];[e-mail];
[e-mail]; Dayn Hardie
Cc: Goicoechea Allen, Megan; Tatum, Tim; Larkin, Matt;Aschenbrenner, Connie;Walker,
Donovan
Subject: [EXTERNAL] Upcoming Idaho Power rate proceeding (Case No. IPC-E-24-07)
KEEP IDAHO POWER SECURE! External emails may request information or contain malicious links or attachments.Verify the
sender before proceeding, and check for additional warning messages below.
Thank you for the discussions on the possibility of Idaho Power filing a Limited Issue General Rate Case. Staff
supports this type of a filing because rates became effective January 1,2024 for the most recent GRC.
As expected by all, Staff intends to conduct its standard review of the filing in this case for salaries and plant in
service in rate base including the appropriate weather normalization and revenue growth. We will verify
consistency across these issues for ratemaking purposes. The establishment of rates with a uniform percent
increase or a proposal based on existing cost of service will also be evaluated as the case proceeds. The 2023
Results of Operation adjusted for the last Stipulation and Order in IPC-E-23-11 will also be thoroughly analyzed.
am sending this to all interested participants as discussed and look forward to seeing the views of others.
Terri Carlock
Administrator Utilities Division
Idaho Public Utilities Commission
208-334-0356
From: Nordstrom, Lisa <[e-mail]>
Sent: Friday, March 8, 2024 2:07 PM
To: Chris Burdin <[e-mail]>; Terri Carlock<[e-mail]>;Taylor Thomas
<[e-mail]>; Donn English<[e-mail]>; Mike Louis
<[e-mail]>; Chris McEwan <[e-mail]>; [e-mail]; Brad
Heusinkveld <[e-mail]>; Diego Rivas<[e-mail]>; Peter Richardson
<peter@ rich ardsonadams.com>; Don Reading<[e-mail]>;Travis Culbertson
<[e-mail]>; kelsey<[e-mail]>; [e-mail]; Courtney
White<[e-mail]>; Darrell Early<[e-mail]>; Ed Jewell
<[e-mail]>; Wil Gehl<[e-mail]>; Anderson, Paige<[e-mail]>; Meier,
1

Peter E. <[e-mail]>; [e-mail]; Tom Arkoosh <[e-mail]>;
Erin Cecil <[e-mail]>; [e-mail]; [e-mail];Thor Nelson
<[e-mail]>; Austin W.Jensen <[e-mail]>; Austin Rueschhoff
<[e-mail]>; Adele Lee<ACLee@hol land hart.com>;[e-mail];
[e-mail];[e-mail]; [e-mail]
Cc: Goicoechea Allen, Megan <[e-mail]>;Tatum,Tim <[e-mail]>; Larkin,
Matt<[e-mail]>; Aschenbrenner, Connie<[e-mail]>; Walker, Donovan
<DWalker@ Ida hopower.com>
Subject:Slides re: Upcoming Idaho Power rate proceeding (Case No. IPC-E-24-07)
CAUTION:This email originated outside the State of Idaho network.Verify links and attachments BEFORE you click or open,even
if you recognize and/or trust the sender.Contact your agency service desk with any concerns.
Good afternoon,
Idaho Power appreciates the broad participation in yesterday's discussion about the possible structure of a future rate
case filing in Case No. IPC-E-24-07. As part of that discussion, the Company was asked to share the discussion slide deck
to facilitate the requested feedback to Idaho Power. Idaho Power is happy to do so if those who wish to receive a copy
will affirm that they will keep the sensitive information contained in the slide deck confidential and not share it with
third parties.
If you wish to receive a copy of the slide deck, please send your confidentiality affirmation to me and I will send it to you
directly.
Best,
Lisa
Lisa Nordstrom
LEAD COUNSEL
Idaho Power I Legal
Office 208-388-5825 1 Mobile [phone]
1121 W. Idaho St.I Boise, ID 1 83702
IDAHO POWER LEGAL DISCLAIMER
This transmission may contain information that is privileged, confidential and/or exempt from disclosure
under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure,
copying, distribution, or use of the information contained herein (including any reliance thereon) is
STRICTLY PROHIBITED. If you received this transmission in error, please immediately contact the sender
and destroy the material in its entirety, whether in electronic or hard copy format.Thank you.
2

Gust, Stacy
From: Gust, Stacy
Sent: Friday, March 29, 2024 3:10 PM
To: Monica Barrios-Sanchez
Subject: RE: IPC-E-24-07 - Idaho Power Company's 2024 General Rate Case or Limited Issue
Rate Proceeding - Idaho Power Company's Supplemental Notice of Intent
Oh perfect!
Happy Easter to you as well!
Stacy Gust
Regulatory Administrative Assistant
Idaho Power I Regulatory Affairs
Office 208-388-5749
[e-mail]
From: Monica Barrios-Sanchez<[e-mail]>
Sent: Friday, March 29, 2024 3:09 PM
To: Gust, Stacy<[e-mail]>
Subject: [EXTERNAL] RE: IPC-E-24-07- Idaho Power Company's 2024 General Rate Case or Limited Issue Rate Proceeding
- Idaho Power Company's Supplemental Notice of Intent
KEEP IDAHO POWER SECURE! External emails may request information or contain malicious links or attachments.Verify the
sender before proceeding, and check for additional warning messages below.
Thanks Stacy. Either email works,they both get routed to me Q
Happy Easter
Thankyou,
Monica Barrios-Sanchez
Commission Secretary
Idaho Public Utilities Commission
11331 W. Chinden Blvd.
Bldg. 8, Ste. 201-A
Boise, ID 83714
208-334-0338
From: Gust, Stacy<[e-mail]>
Sent: Friday, March 29, 2024 3:08 PM
To: secretary<[e-mail]>
i

Subject: FW: IPC-E-24-07- Idaho Power Company's 2024 General Rate Case or Limited Issue Rate Proceeding- Idaho
Power Company's Supplemental Notice of Intent
CAUTION:This email originated outside the State of Idaho network.Verify links and attachments BEFORE you click or open,even
if you recognize and/or trust the sender.Contact your agency service desk with any concerns.
Hi Monica,
This is the same filing as referenced below, I just realized I sent the filing to your email address and did not copy the
secretary email address, so I just wanted to make sure that you received it.
Thank you.
Stacy Gust
Regulatory Administrative Assistant
Idaho Power I Regulatory Affairs
Office 208-388-5749
[e-mail]
From: Gust, Stacy
Sent: Friday, March 29, 2024 3:04 PM
To: Monica Barrios-Sanchez<[e-mail]>
Cc:Tatum,Tim <[e-mail]>; Nordstrom, Lisa <[e-mail]>; Dayn Hardie
<[e-mail]>;Terri Carlock<[e-mail]>
Subject: IPC-E-24-07- Idaho Power Company's 2024 General Rate Case or Limited Issue Rate Proceeding- Idaho Power
Company's Supplemental Notice of Intent
Ms. Barrios-Sanchez,
Please find attached for electronic filing Idaho Power Company's Supplemental Notice of Intent in regard to the above
matter.
If you have any questions regarding this filing, please contact me.
Thank you.
Stacy Gust
Regulatory Administrative Assistant
Idaho Power I Regulatory Affairs
Office 208-388-5749
[e-mail]
IDAHO POWER LEGAL DISCLAIMER
This transmission may contain information that is privileged, confidential and/or exempt from disclosure
under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure,
copying, distribution, or use of the information contained herein (including any reliance thereon) is
2

STRICTLY PROHIBITED. If you received this transmission in error, please immediately contact the sender
and destroy the material in its entirety, whether in electronic or hard copy format.Thank you.
3

Gust, Stacy
From: Gust, Stacy
Sent: Friday, March 29, 2024 3:04 PM
To: Monica Barrios-Sanchez
Cc: Tatum, Tim; Nordstrom, Lisa; Dayn Hardie; Terri Carlock
Subject: IPC-E-24-07 - Idaho Power Company's 2024 General Rate Case or Limited Issue Rate
Proceeding - Idaho Power Company's Supplemental Notice of Intent
Attachments: Supplemental Notice of Intent.pdf
Ms. Barrios-Sanchez,
Please find attached for electronic filing Idaho Power Company's Supplemental Notice of Intent in regard to the above
matter.
If you have any questions regarding this filing, please contact me.
Thank you.
Stacy Gust
Regulatory Administrative Assistant
Idaho Power I Regulatory Affairs
Office 208-388-5749
[e-mail]
1

NOR POWER,
Timothy E.Tatum
Vice President
Regulatory Affairs
March 29, 2024
VIA ELECTRONIC FILING
Monica Barrios-Sanchez, Secretary
Idaho Public Utilities Commission
11331 W. Chinden Blvd., Bldg 8,
Suite 201-A (83714)
PO Box 83720
Boise, Idaho 83720-0074
Re: I PC-E-24-07
Supplemental Notice of Intent to File a General Rate Case or Limited Issue
Rate Proceeding
Dear Ms. Barrios-Sanchez:
On February 14, 2024, pursuant to Rule 122 of the Commission's Rules of Practice
and Procedure, Idaho Power Company filed a Notice of Intent to file a General Rate Case
or limited issue rate proceeding on or after June 1, 2024. After consultation earlier this
month with the parties to general rate case IPC-E-23-11, Idaho Power intends to file a
limited issue rate case proceeding in lieu of a full general rate case. Further, because June
1, 2024, falls on a Saturday, Idaho Power is filing this supplemental Notice that it intends
to make this filing on or after May 31, 2024.
This supplemental Notice has been distributed to parties listed below. Please
advise if there should be other parties added to this distribution.
If you have any questions regarding the proposed filing, please contact me at (208)
388-5515.
Sincerely,
7�� ��—
Timothy E. Tatum
TET/sg
CC' Dayn Hardie, Deputy Attorney General
Terri Carlock
P.O.Box 70(83707)
1221 W.Idaho St.
Boise,ID 83702

Gust, Stacy
From: Larkin, Matt
Sent: Monday, May 6, 2024 3:32 PM
To: Mike Louis
Subject: RE: Planned approach to general rate case
Sounds good. Will do.
Hey one other meeting we talked about setting up was the capital projects documentation. Should we shoot for next
week for that one? I was thinking Staff could give us guidance on what you want to see in this case, and we could give an
update on progress toward long-term solutions.That what you had in mind as well?
From: Mike Louis<[e-mail]>
Sent: Monday, May 6, 2024 3:30 PM
To: Larkin, Matt<[e-mail]>
Subject: [EXTERNAL] RE: Planned approach to general rate case
KEEP IDAHO POWER SECURE! External emails may request information or contain malicious links or attachments.Verify the
sender before proceeding, and check for additional warning messages below.
The purpose of the meeting was to discuss the Company's planned approach to the GRC. As long as you are ready
to discuss it,we should be good.
From: Larkin, Matt<[e-mail]>
Sent: Monday, May 6, 2024 2:56 PM
To: Mike Louis<[e-mail]>
Subject: RE: Planned approach to general rate case
CAUTION:This email originated outside the State of Idaho network.Verify links and attachments BEFORE you click or
open,even if you recognize and/or trust the sender.Contact your agency service desk with any concerns.
Ok just sent it out.Anything you want us to prep in advance?
From: Mike Louis<[e-mail]>
Sent: Monday, May 6, 2024 9:08 AM
To: Larkin, Matt<[e-mail]>
Cc:Terri Carlock<[e-mail]>; Donn English <[e-mail] ho.Gov>;Taylor Thomas
<[e-mail]>; Michael Eldred <[e-mail]>; Chris McEwan
<[e-mail]>
Subject: [EXTERNAL] RE: Planned approach to general rate case
Please do. Thanks Matt.
From: Larkin, Matt<[e-mail]>
Sent: Friday, May 3, 2024 5:37 PM
To: Mike Louis<[e-mail]>
1

Cc:Terri Carlock<[e-mail]>; Donn English <[e-mail]>;Taylor Thomas
<[e-mail]>; Michael Eldred <[e-mail]>; Chris McEwan
<[e-mail]>
Subject: RE: Planned approach to general rate case
CAUTION:This email originated outside the State of Idaho network.Verify Links and attachments BEFORE you click or
open,even if you recognize and/or trust the sender.Contact your agency service desk with any concerns.
Hi Mike,
Thursday, May 91h, at 9 a.m. works for us. Would you like me to send out a Teams invite?
Thanks,
Matt
Matt Larkin
REVENUE REQUIREMENT MANAGER
Idaho Power I Regulatory Affairs
Office 208-388-2461
idahopower.com
From: Mike Louis<[e-mail]>
Sent:Wednesday, May 1, 2024 5:57 PM
To: Larkin, Matt<[e-mail]>
Cc:Terri Carlock<[e-mail]>; Donn English <[e-mail] ho.Gov>;Taylor Thomas
<[e-mail]>; Michael Eldred <[e-mail]>; Chris McEwan
<[e-mail]>
Subject: [EXTERNAL] Planned approach to general rate case
Hi Matt,
am trying to find times available for Staff to discuss the Company's approach to the upcoming rate case, but I am
finding it difficult due to scheduling and staff availability. We have availability on Thursday, May 9 from 9-10 am
and 4 to 5 pm and on Friday, May 10 after 11 pm or sometime soon after;the earlier that day the better.
With regards to the Company's consumption and revenue proposal for a full rate case,we plan to discuss it
internally on the Wednesday before,which will likely inform our discussion on the approach you plan to use in the
upcoming ratecase. We can discuss that as well.
Mike Louis
Engineering Program Manager
Idaho Public Utilities Commission
[e-mail]
208-334-0316 (work)
208-631-6804(cell)
2

IDAHO POWER LEGAL DISCLAIMER
This transmission may contain information that is privileged, confidential and/or exempt from disclosure
under applicable law. If you are not the intended recipient,you are hereby notified that any disclosure,
copying, distribution, or use of the information contained herein (including any reliance thereon) is
STRICTLY PROHIBITED. If you received this transmission in error, please immediately contact the sender
and destroy the material in its entirety, whether in electronic or hard copy format. Thank you.
3

Gust, Stacy
From: Keri Hawker <[e-mail]>
Sent: Thursday, May 30, 2024 2:31 PM
To: Gust, Stacy
Subject: [EXTERNAL] RE: IPC-E-24-07 - Application for Authority to Increase Rates for Electric
Service to Recover Costs Associated with Incremental Capital Investments and Certain
Ongoing Operations and Maintenance Expenses - Protective Agreement
Attachments: Protective Agreement - IPC-E-24-07.pdf
KEEP IDAHO POWER SECURE! External emails may request information or contain malicious links or attachments.Verify the
sender before proceeding, and check for additional warning messages below.
Executed Agreement attached — I will forward any additional Exhibit A's.
Keri Hawker I Legal Administrative Assistant
Idaho Public Utilities Commission
From: Gust, Stacy<[e-mail]>
Sent:Tuesday, May 28, 2024 2:24 PM
To: Chris Burdin <[e-mail]>
Cc: Nordstrom, Lisa <[e-mail]>; Keri Hawker<[e-mail]>
Subject: IPC-E-24-07-Application for Authority to Increase Rates for Electric Service to Recover Costs Associated with
Incremental Capital Investments and Certain Ongoing Operations and Maintenance Expenses- Protective Agreement
CAUTION:This email originated outside the State of Idaho network.Verify links and attachments BEFORE you click or open,even
if you recognize and/or trust the sender.Contact your agency service desk with any concerns.
Mr. Burdin,
In anticipation of providing confidential information in the above matter, please find attached
a Protective Agreement. In order to receive confidential information in this matter please sign
the attached Protective Agreement. In addition, please also have individuals who may be
working on this matter sign Exhibit A.
Please return a signed copy of the Protective Agreement or Exhibit A to Keri Hawker at the
IPUC at [e-mail] (copied) and me at [e-mail].
Thank you.
Stacy Gust
Regulatory Administrative Assistant
Idaho Power I Regulatory Affairs
Office 208-388-5749
[e-mail]
1

IDAHO POWER LEGAL DISCLAIMER
This transmission may contain information that is privileged, confidential and/or exempt from disclosure
under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure,
copying, distribution, or use of the information contained herein (including any reliance thereon) is
STRICTLY PROHIBITED. If you received this transmission in error, please immediately contact the sender
and destroy the material in its entirety, whether in electronic or hard copy format.Thank you.
2

PROTECTIVE AGREEMENT
BETWEEN
IDAHO POWER COMPANY AND
IDAHO PUBLIC UTILITIES COMMISSION STAFF
(AND OTHER PARTIES AS APPLICABLE)
CASE NO. IPC-E-24-07
Idaho Power Company's Application for Authority to Increase Rates for Electric Service to
Recover Costs Associated With Incremental Capital Investments and Certain Ongoing
Operations and Maintenance Expenses
This Protective Agreement is entered into this 28`h day of May, 2024 by Idaho Power Company
("Idaho Power")and the Idaho Public Utilities Commission Staff, and other parties as applicable.
Recitals:
1. WHEREAS, Idaho Power and the Idaho Public Utilities Commission Staff anticipate
that parties to this proceeding may make requests to provide, or make available for review, certain
information, considered by its custodian to be of a trade secret, privileged or confidential nature
(as defined in Idaho Code §§ 74-107 through 74-109 and 48-801).
2. WHEREAS, Idaho Power and the undersigned parties agree that entering into a
Protective Agreement will expedite the production of documents; will afford the necessary
protection to Idaho Power's and the undersigned parties' employees and/or representatives in Case
No. IPC-E-24-07 who might review the information and subsequently be requested to reveal its
contents by setting forth clear cut parameters for use of Confidential Information, and will protect
Confidential Information which might be provided during the course of the proceedings, now
therefore.
IT IS HEREBY STIPULATED AND AGREED AS FOLLOWS:
1. (a) Confidential Information
All documents, data, information, studies and other materials furnished pursuant to any
requests for information, subpoenas or other modes of discovery (formal or informal), and
including depositions, that are claimed to be of trade secret, proprietary or confidential nature
(herein referred to as "Confidential Information") shall be so marked by the party or entity
providing the information by stamping the same with a designation indicating its trade secret,
proprietary or confidential nature and printed on "yellow" paper. IDAPA 31.01.01.067. Any
claim of confidentiality must be accompanied by an attorney's certificate that the material is
protected by law from public disclosure and cite the specific legal authority to support the claim.
IDAPA 31.01.01.233.
IPC-E-24-07-PROTECTIVE AGREEMENT- I

(b) Protection of Confidential Information
Access to and review of Confidential Information shall be strictly controlled by the terms
of this Agreement. Unless otherwise ordered, Confidential Information, including transcripts of
depositions containing information to which a claim of confidentiality is made, shall remain under
seal, shall continue to be subject to the protective requirements of this Agreement, and shall not
be disclosed to individuals who have not executed the nondisclosure agreement set forth in Exhibit
«A
(c) Use of Confidential Information
All persons who may be entitled to review, or who are afforded access to any Confidential
Information by reason of this Agreement shall neither use nor disclose the Confidential
Information for purposes of business or competition, or any purpose other than the purpose of
preparation for and conduct of the proceedings, and then solely as contemplated herein, and shall
keep the Confidential Information secure as trade secret, confidential or proprietary information
and in accordance with the purposes and intent of this Agreement.
(d) Persons Entitled to Review
Access to Confidential Information shall be limited to counsel of the undersigned parties,
employees, experts, agents or representatives of the undersigned parties who have executed an
Exhibit "A" to this Agreement. Such information will be clearly marked and protected from
unauthorized public disclosure.
(e) Non-disclosure Agreement
Confidential Information shall not be disclosed to any person who has not signed a non-
disclosure agreement on this form, which is attached hereto as Exhibit "A" and incorporated
herein. The non-disclosure agreement or Exhibit"A" shall require the person to whom disclosure
is to be made to read a copy of this Protective Agreement and to certify in writing that he or she
has reviewed the same and has consented to be bound by its terms. The Agreement shall contain
the signatory's full name,permanent address and employer. Such agreement shall be delivered to
counsel for the providing party,before disclosure is made.
2. Copies
No copies or transcriptions of the Confidential Information shall be made by the recipient
except as necessary to make the information available to individuals who have executed an Exhibit
"A"to this Protective Agreement.
IPC-E-24-07-PROTECTIVE AGREEMENT-2

3. Non-waiver of Objection to Admissibility
The furnishing of any document, information, data, study or other materials pursuant to
this Protective Agreement shall in no way limit or waive the right of the providing party to object
to its relevance or admissibility in any proceedings before this Commission.
4. Challenge to Confidentiality
(a) Initial Challenge
This Protective Agreement establishes a procedure for the expeditious handling of
information that a parry claims is confidential. Any party may challenge the characterization of
any information, document, data or study claimed by the providing party to be a trade secret,
proprietary or confidential information. A party seeking to challenge the confidentiality of any
information shall first contact counsel for the providing party and attempt to resolve any difference
by stipulation. Resolution may include removing the confidential classifications, creating a non-
confidential summary, reformatting the information, etc.
(b) Subsequent Challenge
In the event that the parties cannot agree as to the character of the information challenged,
any party challenging the confidentiality may petition the Commission to rule upon the disputed
information. The Petition shall be served upon the Commission and all parties to the case who
have signed an Exhibit"A"as provided in this Protective Agreement. The Petition shall designate
with specificity the document or material challenged and state the grounds upon which the subject
material are deemed to be non-confidential by the challenging parry.
(c) Challenge Hearing
The challenging party shall request that the Commission conduct an in camera proceeding
where only those persons duly authorized to have access to such challenged materials under this
Protective Agreement shall be present. This hearing shall be commenced no earlier than five (5)
business days after serving the Petition on the providing party and the Commission. The record
of the in camera hearing shall be marked "CONFIDENTIAL — Subject to Protective
Agreement." To the extent necessary, the transcript of such hearing shall be separately bound,
segregated, sealed, and withheld from public inspection by any person not bound by the terms of
this Agreement.
IPC-E-24-07-PROTECTIVE AGREEMENT-3

(d) Determination
The parties will ask the Commission to issue an Order determining whether any challenged
information or material is not properly deemed to be exempt from public disclosure pursuant to
the
Idaho Public Records Act(Idaho Code§§ 74-101 through 74-126). If information is found
to be not exempt from disclosure, no parry shall disclose such challenged material or use it in the
public record, or otherwise outside the proceedings for at least five (5) business days unless the
providing parry consents to such conduct. This procedure enables the restrictions of this
Agreement from material claimed to be confidential. Such relief may be sought from the
Commission or a court of competent jurisdiction.
5. (a) Receipt Into Evidence
Provision is hereby made for receipt into evidence in this proceeding of materials claimed
to be confidential in the following manner:
(1) If the requesting party intends to use Confidential Information or to make
substantive reference to Confidential Information supplied to it under this Agreement, it shall give
reasonable prior notice of such intention to the providing party and shall provide copies of the used
Confidential Information or substantive reference to Confidential Information only to the
providing party,and such other parties,if any,who have executed an Exhibit"A"to this Protective
Agreement.
(2) One (1) copy of the used Confidential Information or substantive reference to
Confidential Information or substantive reference to Confidential Information described in
paragraph 5(a)(1) shall be placed in the sealed record.
(3) The copy of the documents to be placed in the sealed record shall be tendered
by counsel for the providing parry to the Commission, and shall be maintained in accordance with
the terms of this Protective Agreement.
(b) Seal
While in the custody of the Commission, materials containing Confidential Information
shall be marked "CONFIDENTIAL — SUBJECT TO ATTORNEY'S CERTIFICATE OF
CONFIDENTIALITY" and shall not be examined by any person except under the conditions set
forth in this Agreement, if applicable.
IPC-E-24-07-PROTECTIVE AGREEMENT-4

(c) In Camera Hearing and Transcripts
Any Confidential Information that must be orally disclosed at a hearing in the proceedings
shall be offered at an in camera hearing, attended only by persons authorized to have access to the
information under this Protective Agreement. Similarly, any transcription of any examination or
other reference to Confidential Information (or that portion of the record containing Confidential
Information) shall be marked and treated as provided herein for Confidential Information.
(d) Access to Record
Access to sealed testimony, records, and information shall be limited to the Commission
and persons who have signed an Exhibit"A"as provided in this Protective Agreement,unless such
information is released from the restrictions of this Agreement either through agreement of the
parties or after notice to the parties and hearing, pursuant to the order of the Commission and/or
the final order of a court having final jurisdiction.
(e) Appeal
Should an appeal from the proceeding be taken, sealed portions of the record may be
forwarded to any court of competent jurisdiction for purposes of an appeal, but under seal as
designated herein for the information and use of the court. If a portion of the record is forwarded
to a court under seal for the purposes of an appeal, the providing party shall be notified which
portion of the sealed record has been designated by the appealing party as necessary to the record
on appeal.
6. Use in Pleadings
Where references to Confidential Information in the sealed record or with the custodian is
required in pleadings, briefs, arguments, or motions (except as provided in Paragraph 5), it shall
be by citation to title or exhibit number or some other description that will not disclose the
substantive Confidential Information contained therein. Any use of or substantive references to
Confidential Information shall be placed in a separate section of the pleading or brief and submitted
to the Commission pursuant to Paragraph 5. This sealed section shall be served only on counsel
of record who have signed the nondisclosure agreements set forth in Exhibit "A" attached to this
Protective Agreement, and may, in turn, be disclosed by them only to individuals who likewise
signed Exhibit"A".
IPC-E-24-07-PROTECTIVE AGREEMENT-5

7. Summary of Record
If deemed necessary by the Commission, the providing parties shall prepare a written
summary of the Confidential Information referred to in Orders to be issued to the public and the
parties.
8. Return or Destruction of Confidential Information
(a) Upon request of the providing party, all original documents and copies of the
Confidential Information shall be: (1)returned to the providing parry; or(2) or at the option of the
recipient destroyed within thirty (30) days after the final settlement or conclusion of the
proceedings, including administrative or judicial review thereof. After return or destruction of
documents pursuant to this paragraph, and upon request, a written receipt verifying return or
destruction shall be provided by counsel.
(b) On a case-by-case basis and upon notification to the utility, the Commission Staff
may retain one copy of the Confidential Information under seal. Notwithstanding any other
provision in this Agreement,any member of Staff may review and use that copy of the Confidential
Information outside this proceeding while performing his or her duties as a Staff member. Staff's
use and disclosure of the Confidential Information in a later Commission proceeding shall be
subject to any protective agreement signed in the proceeding.
(c) Any notes maintained by a recipient of Confidential Information which embody
or reflect any of the Confidential Information provided under this Agreement shall, upon request
of the providing party, be either returned to the providing party or, at the option of the recipient,
destroyed.
9. Effective Date
This Protective Agreement shall become effective on the date hereof.
IPC-E-24-07-PROTECTIVE AGREEMENT-6

DATED this 28th day of May 2024.
IDAHO POWER COMPANY
B_ 05 . S.
Lisa D. Nordstrom
Idaho Power Company
1221 West Idaho Street
Boise, Idaho 83702
Attorney Representing Idaho Power Company
IDAHO PUBLIC UTILITIES COMMISSION STAFF
By: &J z4-'A
Chris Burdin
Deputy Attorney General
Idaho Public Utilities Commission
11331 W. Chinden Blvd., Bldg 8,
Suite 201-A(83714)
PO Box 83720
Boise, Idaho 83720-0074
Attorney Representing the
Idaho Public Utilities Commission Staff
IPC-E-24-07-PROTECTIVE AGREEMENT-7

EXHIBIT"A"
I have reviewed the foregoing Protective Agreement dated May 28, 2024, in Case No.
IPC-E-24-07 and agree to be bound by the terms and conditions of such Agreement.
Matt Suess
Public Utilities Commission
Employer or Firm
11331 W. Chinden Blvd., Building 8, Suite 201-A
Boise. Idaho 83714
Business Address
Commission Staff
Party
//2A zo zit
Date
EXHIBIT "A"

EXHIBIT "A"
I have reviewed the foregoing Protective Agreement dated May 28, 2024, in Case No.
IPC-E-24-07 and agree to be bound by the terms and conditions of such Agreement.
Jolen r
ossard
Public Utilities Commission
Employer or Firm
11331 W. Chinden Blvd., Building 8, Suite 201-A
Boise, Idaho 83 714
Business Address
Commission Staff
Party
Date
EXHIBIT "A"

EXHIBIT "A"
I have reviewed the foregoing Protective Agreement dated May 28, 2024, in Case No.
IPC-E-24-07 and agree to be bound by the terms and conditions of such Agreement.
seph Te
Public Utilities Commission
Employer or Firm
11331 W. Chinden Blvd., Building 8, Suite 201-A
Boise, Idaho 83714
Business Address
Commission Staff
Parry
Date/
EXHIBIT "A"

EXHIBIT "A"
I have reviewed the foregoing Protective Agreement dated May 28, 2024, in Case No.
IPC-E-24-07 and agree to be bound by the terms and conditions of such Agreement.
k"4"' L '-k
Kimberly L kot 4
Public Utilities Commission
Employer or Firm
11331 W. Chinden Blvd., Building 8, Suite 201-A
Boise,Idaho 83714
Business Address
Commission Staff
Party
6 2
Date
EXHIBIT "A"

EXHIBIT "A"
I have reviewed the foregoing Protective Agreement dated May 28, 2024, in Case No.
IPC-E-24-07 and agree to be bound by the terms and conditions of such Agreement.
Micha 1 red
Public Utilities Commission
Employer or Firm
11331 W. Chinden Blvd., Building 8, Suite 201-A
Boise, Idaho 83714
Business Address
Commission Staff
Party
�5 a aLI
Date
EXHIBIT "A"

EXHIBIT "A"
I have reviewed the foregoing Protective Agreement dated May 28, 2024, in Case No.
IPC-E-24-07 and agree to be bound by the terms and conditions of such Agreement.
�1�
L'J'—
Curtis Thaden
Public Utilities Commission
Employer or Firm
11331 W. Chinden Blvd., Building 8, Suite 201-A
Boise, Idaho 83714
Business Address
Commission Staff
Party
30 0a ��
Date
EXHIBIT "A"

EXHIBIT "A"
I have reviewed the foregoing Protective Agreement dated May 28, 2024, in Case No.
IPC-E-24-07 and agree to be bound by the terms and conditions of such Agreement.
Laura Conilogue
Public Utilities Commission
Employer or Firm
11331 W. Chinden Blvd., Building 8, Suite 201-A
Boise, Idaho 83714
Business Address
Commission Staff
Party
2;� 301202
Date
EXHIBIT"A"

Gust, Stacy
From: Chris Burdin <[e-mail]>
Sent: Tuesday, May 28, 2024 11:58 AM
To: Nordstrom, Lisa
Subject: [EXTERNAL] RE: IPC-E-24-07 protective agreement
KEEP IDAHO POWER SECURE! External emails may request information or contain malicious links or attachments.Verify the
sender before proceeding, and check for additional warning messages below.
Hey Lisa,yes,you can put me down for this one. I don't think RMP's rate case has been assigned yet, so we will
see.
-Chris
0CChris Burdin I Deputy Attorney General
Idaho Public Utilities Commission
State General Counsel and Fair Hearings
Office of the Attorney General I State of Idaho
208-334-0314 1 www.puc.idaho.gov
NOTICE:This message, including any attachments, is intended only for the individual(s)or entity(ies) named above
and may contain information that is confidential, privileged, attorney work product, or otherwise exempt from
disclosure under applicable law. If you are not the intended recipient, please reply to the sender that you have
received this transmission in error, and then please delete this email.
From: Nordstrom, Lisa <[e-mail]>
Sent:Tuesday, May 28, 2024 11:02 AM
To: Chris Burdin <[e-mail]>
Subject: IPC-E-24-07 protective agreement
CAUTION:This email originated outside the State of Idaho network.Verify links and attachments BEFORE you click or open,even
if you recognize and/or trust the sender.Contact your agency service desk with any concerns.
Hi Chris,
I am in moderate denial that I am filing a limited issue rate case in 4 days,yet here I am reviewing the protective
agreement! Shall I put your name on the signature line as Staff's counsel, or are you handling RMP's rate case instead?
I know you could do both simultaneously but that's a little too "extra"to contemplate this morning.
Lisa Nordstrom
LEAD COUNSEL
Idaho Power I Legal
Office 208-388-5825 1 Mobile [phone]
1

1121 W. Idaho St.I Boise, ID 1 83702
IDAHO POWER LEGAL DISCLAIMER
This transmission may contain information that is privileged, confidential and/or exempt from disclosure
under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure,
copying, distribution, or use of the information contained herein (including any reliance thereon) is
STRICTLY PROHIBITED. If you received this transmission in error, please immediately contact the sender
and destroy the material in its entirety, whether in electronic or hard copy format.Thank you.
2

Gust, Stacy
From: Gust, Stacy
Sent: Tuesday, May 28, 2024 2:24 PM
To: [e-mail]
Cc: Nordstrom, Lisa; [e-mail]
Subject: IPC-E-24-07 -Application for Authority to Increase Rates for Electric Service to Recover
Costs Associated with Incremental Capital Investments and Certain Ongoing Operations
and Maintenance Expenses - Protective Agreement
Attachments: Protective Agreement - IPC-E-24-07.pdf
Mr. Burdin,
In anticipation of providing confidential information in the above matter, please find attached
a Protective Agreement. In order to receive confidential information in this matter please sign
the attached Protective Agreement. In addition, please also have individuals who may be
working on this matter sign Exhibit A.
Please return a signed copy of the Protective Agreement or Exhibit A to Keri Hawker at the
IPUC at [e-mail] (copied) and me at [e-mail].
Thank you.
Stacy Gust
Regulatory Administrative Assistant
Idaho Power I Regulatory Affairs
Office 208-388-5749
[e-mail]
1

PROTECTIVE AGREEMENT
BETWEEN
IDAHO POWER COMPANY AND
IDAHO PUBLIC UTILITIES COMMISSION STAFF
(AND OTHER PARTIES AS APPLICABLE)
CASE NO. IPC-E-24-07
Idaho Power Company's Application for Authority to Increase Rates for Electric Service to
Recover Costs Associated With Incremental Capital Investments and Certain Ongoing
Operations and Maintenance Expenses
This Protective Agreement is entered into this 28`h day of May, 2024 by Idaho Power Company
("Idaho Power")and the Idaho Public Utilities Commission Staff, and other parties as applicable.
Recitals:
1. WHEREAS, Idaho Power and the Idaho Public Utilities Commission Staff anticipate
that parties to this proceeding may make requests to provide, or make available for review, certain
information, considered by its custodian to be of a trade secret, privileged or confidential nature
(as defined in Idaho Code §§ 74-107 through 74-109 and 48-801).
2. WHEREAS, Idaho Power and the undersigned parties agree that entering into a
Protective Agreement will expedite the production of documents; will afford the necessary
protection to Idaho Power's and the undersigned parties' employees and/or representatives in Case
No. IPC-E-24-07 who might review the information and subsequently be requested to reveal its
contents by setting forth clear cut parameters for use of Confidential Information, and will protect
Confidential Information which might be provided during the course of the proceedings, now
therefore.
IT IS HEREBY STIPULATED AND AGREED AS FOLLOWS:
1. (a) Confidential Information
All documents, data, information, studies and other materials furnished pursuant to any
requests for information, subpoenas or other modes of discovery (formal or informal), and
including depositions, that are claimed to be of trade secret, proprietary or confidential nature
(herein referred to as "Confidential Information") shall be so marked by the party or entity
providing the information by stamping the same with a designation indicating its trade secret,
proprietary or confidential nature and printed on "yellow" paper. IDAPA 31.01.01.067. Any
claim of confidentiality must be accompanied by an attorney's certificate that the material is
protected by law from public disclosure and cite the specific legal authority to support the claim.
IDAPA 31.01.01.233.
IPC-E-24-07-PROTECTIVE AGREEMENT- I

(b) Protection of Confidential Information
Access to and review of Confidential Information shall be strictly controlled by the terms
of this Agreement. Unless otherwise ordered, Confidential Information, including transcripts of
depositions containing information to which a claim of confidentiality is made, shall remain under
seal, shall continue to be subject to the protective requirements of this Agreement, and shall not
be disclosed to individuals who have not executed the nondisclosure agreement set forth in Exhibit
«A
(c) Use of Confidential Information
All persons who may be entitled to review, or who are afforded access to any Confidential
Information by reason of this Agreement shall neither use nor disclose the Confidential
Information for purposes of business or competition, or any purpose other than the purpose of
preparation for and conduct of the proceedings, and then solely as contemplated herein, and shall
keep the Confidential Information secure as trade secret, confidential or proprietary information
and in accordance with the purposes and intent of this Agreement.
(d) Persons Entitled to Review
Access to Confidential Information shall be limited to counsel of the undersigned parties,
employees, experts, agents or representatives of the undersigned parties who have executed an
Exhibit "A" to this Agreement. Such information will be clearly marked and protected from
unauthorized public disclosure.
(e) Non-disclosure Agreement
Confidential Information shall not be disclosed to any person who has not signed a non-
disclosure agreement on this form, which is attached hereto as Exhibit "A" and incorporated
herein. The non-disclosure agreement or Exhibit"A" shall require the person to whom disclosure
is to be made to read a copy of this Protective Agreement and to certify in writing that he or she
has reviewed the same and has consented to be bound by its terms. The Agreement shall contain
the signatory's full name,permanent address and employer. Such agreement shall be delivered to
counsel for the providing party,before disclosure is made.
2. Copies
No copies or transcriptions of the Confidential Information shall be made by the recipient
except as necessary to make the information available to individuals who have executed an Exhibit
"A"to this Protective Agreement.
IPC-E-24-07-PROTECTIVE AGREEMENT-2

3. Non-waiver of Objection to Admissibility
The furnishing of any document, information, data, study or other materials pursuant to
this Protective Agreement shall in no way limit or waive the right of the providing party to object
to its relevance or admissibility in any proceedings before this Commission.
4. Challenge to Confidentiality
(a) Initial Challenge
This Protective Agreement establishes a procedure for the expeditious handling of
information that a parry claims is confidential. Any party may challenge the characterization of
any information, document, data or study claimed by the providing party to be a trade secret,
proprietary or confidential information. A party seeking to challenge the confidentiality of any
information shall first contact counsel for the providing party and attempt to resolve any difference
by stipulation. Resolution may include removing the confidential classifications, creating a non-
confidential summary, reformatting the information, etc.
(b) Subsequent Challenge
In the event that the parties cannot agree as to the character of the information challenged,
any party challenging the confidentiality may petition the Commission to rule upon the disputed
information. The Petition shall be served upon the Commission and all parties to the case who
have signed an Exhibit"A"as provided in this Protective Agreement. The Petition shall designate
with specificity the document or material challenged and state the grounds upon which the subject
material are deemed to be non-confidential by the challenging parry.
(c) Challenge Hearing
The challenging party shall request that the Commission conduct an in camera proceeding
where only those persons duly authorized to have access to such challenged materials under this
Protective Agreement shall be present. This hearing shall be commenced no earlier than five (5)
business days after serving the Petition on the providing party and the Commission. The record
of the in camera hearing shall be marked "CONFIDENTIAL — Subject to Protective
Agreement." To the extent necessary, the transcript of such hearing shall be separately bound,
segregated, sealed, and withheld from public inspection by any person not bound by the terms of
this Agreement.
IPC-E-24-07-PROTECTIVE AGREEMENT-3

(d) Determination
The parties will ask the Commission to issue an Order determining whether any challenged
information or material is not properly deemed to be exempt from public disclosure pursuant to
the
Idaho Public Records Act(Idaho Code§§ 74-101 through 74-126). If information is found
to be not exempt from disclosure, no parry shall disclose such challenged material or use it in the
public record, or otherwise outside the proceedings for at least five (5) business days unless the
providing parry consents to such conduct. This procedure enables the restrictions of this
Agreement from material claimed to be confidential. Such relief may be sought from the
Commission or a court of competent jurisdiction.
5. (a) Receipt Into Evidence
Provision is hereby made for receipt into evidence in this proceeding of materials claimed
to be confidential in the following manner:
(1) If the requesting party intends to use Confidential Information or to make
substantive reference to Confidential Information supplied to it under this Agreement, it shall give
reasonable prior notice of such intention to the providing party and shall provide copies of the used
Confidential Information or substantive reference to Confidential Information only to the
providing party,and such other parties,if any,who have executed an Exhibit"A"to this Protective
Agreement.
(2) One (1) copy of the used Confidential Information or substantive reference to
Confidential Information or substantive reference to Confidential Information described in
paragraph 5(a)(1) shall be placed in the sealed record.
(3) The copy of the documents to be placed in the sealed record shall be tendered
by counsel for the providing parry to the Commission, and shall be maintained in accordance with
the terms of this Protective Agreement.
(b) Seal
While in the custody of the Commission, materials containing Confidential Information
shall be marked "CONFIDENTIAL — SUBJECT TO ATTORNEY'S CERTIFICATE OF
CONFIDENTIALITY" and shall not be examined by any person except under the conditions set
forth in this Agreement, if applicable.
IPC-E-24-07-PROTECTIVE AGREEMENT-4

(c) In Camera Hearing and Transcripts
Any Confidential Information that must be orally disclosed at a hearing in the proceedings
shall be offered at an in camera hearing, attended only by persons authorized to have access to the
information under this Protective Agreement. Similarly, any transcription of any examination or
other reference to Confidential Information (or that portion of the record containing Confidential
Information) shall be marked and treated as provided herein for Confidential Information.
(d) Access to Record
Access to sealed testimony, records, and information shall be limited to the Commission
and persons who have signed an Exhibit"A"as provided in this Protective Agreement,unless such
information is released from the restrictions of this Agreement either through agreement of the
parties or after notice to the parties and hearing, pursuant to the order of the Commission and/or
the final order of a court having final jurisdiction.
(e) Appeal
Should an appeal from the proceeding be taken, sealed portions of the record may be
forwarded to any court of competent jurisdiction for purposes of an appeal, but under seal as
designated herein for the information and use of the court. If a portion of the record is forwarded
to a court under seal for the purposes of an appeal, the providing party shall be notified which
portion of the sealed record has been designated by the appealing party as necessary to the record
on appeal.
6. Use in Pleadings
Where references to Confidential Information in the sealed record or with the custodian is
required in pleadings, briefs, arguments, or motions (except as provided in Paragraph 5), it shall
be by citation to title or exhibit number or some other description that will not disclose the
substantive Confidential Information contained therein. Any use of or substantive references to
Confidential Information shall be placed in a separate section of the pleading or brief and submitted
to the Commission pursuant to Paragraph 5. This sealed section shall be served only on counsel
of record who have signed the nondisclosure agreements set forth in Exhibit "A" attached to this
Protective Agreement, and may, in turn, be disclosed by them only to individuals who likewise
signed Exhibit"A".
IPC-E-24-07-PROTECTIVE AGREEMENT-5

7. Summary of Record
If deemed necessary by the Commission, the providing parties shall prepare a written
summary of the Confidential Information referred to in Orders to be issued to the public and the
parties.
8. Return or Destruction of Confidential Information
(a) Upon request of the providing party, all original documents and copies of the
Confidential Information shall be: (1)returned to the providing parry; or(2) or at the option of the
recipient destroyed within thirty (30) days after the final settlement or conclusion of the
proceedings, including administrative or judicial review thereof. After return or destruction of
documents pursuant to this paragraph, and upon request, a written receipt verifying return or
destruction shall be provided by counsel.
(b) On a case-by-case basis and upon notification to the utility, the Commission Staff
may retain one copy of the Confidential Information under seal. Notwithstanding any other
provision in this Agreement,any member of Staff may review and use that copy of the Confidential
Information outside this proceeding while performing his or her duties as a Staff member. Staff's
use and disclosure of the Confidential Information in a later Commission proceeding shall be
subject to any protective agreement signed in the proceeding.
(c) Any notes maintained by a recipient of Confidential Information which embody
or reflect any of the Confidential Information provided under this Agreement shall, upon request
of the providing party, be either returned to the providing party or, at the option of the recipient,
destroyed.
9. Effective Date
This Protective Agreement shall become effective on the date hereof.
IPC-E-24-07-PROTECTIVE AGREEMENT-6

DATED this 28th day of May 2024.
IDAHO POWER COMPANY
By. 6;�ZL S.
Lisa D. Nordstrom
Idaho Power Company
1221 West Idaho Street
Boise, Idaho 83702
Attorney Representing Idaho Power Company
IDAHO PUBLIC UTILITIES COMMISSION STAFF
By:
Chris Burdin
Deputy Attorney General
Idaho Public Utilities Commission
11331 W. Chinden Blvd., Bldg 8,
Suite 201-A(83714)
PO Box 83720
Boise, Idaho 83720-0074
Attorney Representing the
Idaho Public Utilities Commission Staff
IPC-E-24-07-PROTECTIVE AGREEMENT-7

EXHIBIT "A"
I have reviewed the foregoing Protective Agreement dated May 28,2024,in Case No. IPC-
E-24-07 and agree to be bound by the terms and conditions of such Agreement.
Signature
Printed Name
Employer or Firm
Business Address
Party
Date
EXHIBIT"A"

Gust, Stacy
From: Nordstrom, Lisa
Sent: Friday, May 31, 2024 3:14 PM
To: Justina Caviglia; Diego Rivas; Ed Jewell; Peter Richardson; Terri Carlock; Nordstrom, Lisa;
Chris Burdin;Taylor Thomas; Donn English; Mike Louis; Chris McEwan;
[e-mail]; Brad Heusinkveld; Don Reading; kelsey;
[e-mail]; Courtney White; Darrell Early;Wil Gehl; Anderson,
Paige; Meier, Peter E.; [e-mail]; Tom Arkoosh; Erin Cecil;
[e-mail]; [e-mail]; Thor Nelson; Austin W. Jensen;Austin
Rueschhoff; Adele Lee;Jim Swier; Norman M. Semanko; [e-mail];
Dayn Hardie
Cc: Tatum, Tim; Goicoechea Allen, Megan; Larkin, Matt;Aschenbrenner, Connie;Walker,
Donovan
Subject: Idaho Power rate proceeding (Case No. IPC-E-24-07)
Attachments: Application.pdf, Tatum DI Testimony.pdf; Larkin DI Testimony.pdf; Hackett DI
Testimony_Red acted.pdf; Colburn DI Testimony.pdf, Bill Insert.pdf, News Release.pdf
IPC-E-23-11 parties,
As previously indicated, Idaho Power filed its limited issue rate case this afternoon. For your convenience, I've attached
the Application,four witness testimonies, and customer communications.
Best,
Lisa Nordstrom
LEAD COUNSEL
Idaho Power I Legal
Office 208-388-5825 1 Mobile [phone]
1121 W. Idaho St.I Boise, ID 1 83702
From:Tatum,Tim <[e-mail]>
Sent: Wednesday, March 27, 2024 1:48 PM
To:Justina Caviglia <[e-mail]>; Diego Rivas<[e-mail]>; Ed Jewell
<[e-mail]>; Peter Richardson <[e-mail]>;Terri Carlock
<[e-mail]>; Nordstrom, Lisa <[e-mail]>; Chris Burdin
<[e-mail]>;Taylor Thomas<[e-mail]>; Donn English
<[e-mail] ho.Gov>; Mike Louis<[e-mail]>; Chris McEwan
<[e-mail]>; [e-mail]; Brad Heusinkveld
<[e-mail]>; Don Reading<[e-mail]>; kelsey<[e-mail]>;
[e-mail]; Courtney White<[e-mail]>; Darrell Early
<[e-mail]>; Wil Gehl <[e-mail]>; Anderson, Paige<[e-mail]>; Meier,
Peter E. <[e-mail]>; detheridge@ exeterassociates.com; Tom Arkoosh <[e-mail]>;
Erin Cecil <[e-mail]>; [e-mail]; [e-mail];Thor Nelson
<[e-mail]>; Austin W.Jensen <[e-mail]>; Austin Rueschhoff
<[e-mail]>; Adele Lee<ACLee@hol land hart.com>;[e-mail]; Norman M. Semanko
<[e-mail]>; [e-mail]; Dayn Hardie<[e-mail]>
Cc: Goicoechea Allen, Megan <[e-mail]>; Larkin, Matt<[e-mail]>;
Aschenbrenner, Connie<[e-mail]>; Walker, Donovan<[e-mail]>
Subject: RE: [External] RE: Upcoming Idaho Power rate proceeding (Case No. IPC-E-24-07)
1

All—
Thank you for your input regarding a potential limited issue rate proceeding. In consideration of your feedback, Idaho
Power plans to file a supplemental notice of intent with the IPUC this Friday, March 29t", indicating the company plans
to file a limited issue rate proceeding on or after May 31, 2024 (June 1st falls on a Saturday).
Thank you again for your thoughtful consideration and input. We look forward to working with all of you in this
upcoming case process.
Best,
Tim
Tim Tatum
Vice President of Regulatory Affairs
Idaho Power I Regulatory Affairs
Office 208-388-5515 1 Mobile [phone]
[e-mail]
From:Tatum,Tim
Sent:Thursday, March 21, 2024 10:45 AM
To:Justina Caviglia <[e-mail]>; Diego Rivas<[e-mail]>; Ed Jewell
<[e-mail]>; Peter Richardson <[e-mail]>;Terri Carlock
<[e-mail]>; Nordstrom, Lisa <[e-mail]>; Chris Burdin
<[e-mail]>;Taylor Thomas<[e-mail]>; Donn English
<[e-mail] ho.Gov>; Mike Louis<[e-mail]>; Chris McEwan
<[e-mail]>; [e-mail]; Brad Heusinkveld
<[e-mail]>; Don Reading<[e-mail]>; kelsey<[e-mail]>;
[e-mail]; Courtney White<[e-mail]>; Darrell Early
<[e-mail]>; Wil Gehl <[e-mail]>;Anderson, Paige<[e-mail]>; Meier,
Peter E. <[e-mail]>; [e-mail]; Tom Arkoosh <[e-mail]>;
Erin Cecil <[e-mail]>; [e-mail]; [e-mail];Thor Nelson
<[e-mail]>; Austin W.Jensen <[e-mail]>;Austin Rueschhoff
<[e-mail]>; Adele Lee<ACLee@hol land hart.com>; [e-mail]; Norman M. Semanko
<[e-mail]>; [e-mail]; Dayn Hardie<[e-mail]>
Cc: Goicoechea Allen, Megan <[e-mail]>; Larkin, Matt<[e-mail]>;
Aschenbrenner, Connie<[e-mail]>; Walker, Donovan <[e-mail]>
Subject: RE: [External] RE: Upcoming Idaho Power rate proceeding (Case No. IPC-E-24-07)
Thank you to Staff and intervenor parties for your thoughtful consideration of Idaho Power's proposed limited issue rate
proceeding in 2024.Also,thank you to those who have shared your position on this proposal, which will help greatly to
inform the company's next steps.
While I have not heard from all parties yet, I will share the company's planned next steps with this group no later than
the end of next week. We also plan to formalize the company's filing plans though an updated notice of intent filing
toward the end of next week.
Thank you again for the productive and collaborative discussions on this matter.
2

Best Regards,
Tim
Tim Tatum
Vice President of Regulatory Affairs
Idaho Power I Regulatory Affairs
Office 208-388-5515 1 Mobile [phone]
[e-mail]
From:Justina Caviglia <[e-mail]>
Sent: Wednesday, March 20, 2024 10:14 AM
To: Diego Rivas<[e-mail]>; Ed Jewell <[e-mail]>; Peter Richardson
<peter@ rich ardsonadams.com>;Terri Carlock<[e-mail]>; Nordstrom, Lisa
<[e-mail]>; Chris Burdin <[e-mail]>;Taylor Thomas
<[e-mail]>; Donn English <[e-mail] ho.Gov>; Mike Louis
<[e-mail]>; Chris McEwan <[e-mail]>; [e-mail]; Brad
Heusinkveld <[e-mail]>; Don Reading<[e-mail]>; kelsey
<[e-mail]>; [e-mail]; Courtney White
<[e-mail]>; Darrell Early<[e-mail]>; Wil Gehl <[e-mail]>;
Anderson, Paige<[e-mail]>; Meier, Peter E.<[e-mail]>;
[e-mail];Tom Arkoosh <[e-mail]>; Erin Cecil <[e-mail]>;
[e-mail]; [e-mail];Thor Nelson<[e-mail]>; Austin W.Jensen
<[e-mail]>;Austin Rueschhoff<[e-mail]>;Adele Lee
<[e-mail]>; [e-mail]; Norman M. Semanko<[e-mail]>;
[e-mail]; Dayn Hardie<[e-mail]>
Cc: Goicoechea Allen, Megan <[e-mail]>;Tatum,Tim <[e-mail]>; Larkin,
Matt<[e-mail]>;Aschenbrenner, Connie<[e-mail]>; Walker, Donovan
<[e-mail]>
Subject: Re: [External] RE: Upcoming Idaho Power rate proceeding (Case No. IPC-E-24-07)
KEEP IDAHO POWER SECURE! External emails may request information or contain malicious links or attachments.Verify the
sender before proceeding, and check for additional warning messages below.
Thank you Terri, Walmart supports this approach as well.
Get Outlook for iCIS
Justina Caviglia
PARSONSAttorney at Law
BEHILE Parsons Behle&Latimer
LATIMER 50 West Liberty Street, Suite 750 • Reno, Nevada 89501
Main+1 775.323.1601 • Direct+1 775.789.6559
awCorpoiatio arsonsbehle.com • JCavi lia arsonsbehle.com • vCard
Law Corporation p g @p
CONFIDENTIALITY NOTICE: This electronic mail message and any attachment(s)are confidential and may also contain privileged attorney-client
information or work product. The message is intended only for the use of the addressee. If you are not the intended recipient,or the person responsible
3

to deliver it to the intended recipient,you may not use,distribute,or copy this communication. If you have received the message in error, please
immediately notify us by reply electronic mail or by telephone at+1 801.532.1234,and delete this original message.
From: Diego Rivas<[e-mail]>
Sent: Wednesday, March 20, 2024 8:17:43 AM
To: Ed Jewell <[e-mail]>; Peter Richardson <[e-mail]>;Terri Carlock
<[e-mail]>; Nordstrom, Lisa <[e-mail]>; Chris Burdin
<[e-mail]>;Taylor Thomas<[e-mail]>; Donn English
<[e-mail]>; Mike Louis<[e-mail]>; Chris McEwan
<[e-mail]>; [e-mail] <[e-mail]>; Brad Heusinkveld
<[e-mail]?>; Don Reading<[e-mail]>; kelsey<[e-mail]>;
[e-mail] <[e-mail]>; Courtney White
<[e-mail]>; Darrell Early<[e-mail] >; Wil Gehl <[e-mail]>;
Anderson, Paige<[e-mail]>; Meier, Peter E.<[e-mail]>;
[e-mail] <[e-mail]>;Tom Arkoosh <[e-mail]>;
Erin Cecil <[e-mail]>; [e-mail] <[e-mail]>; [e-mail]
<[e-mail]>;Thor Nelson <[e-mail]>;Austin W.Jensen
<[e-mail]>; Austin Rueschhoff<[e-mail]>;Adele Lee
<[e-mail]>; [e-mail] <[e-mail]>; Norman M. Semanko
<[e-mail]>;Justina Caviglia <[e-mail]>; [e-mail]
<[e-mail]>; Dayn Hardie<[e-mail]>
Cc: Goicoechea Allen, Megan <[e-mail]>;Tatum,Tim <[e-mail]>; Larkin,
Matt<[e-mail]>;Aschenbrenner, Connie<[e-mail]>; Walker, Donovan
<[e-mail]>
Subject: Re: [External] RE: Upcoming Idaho Power rate proceeding (Case No. IPC-E-24-07)
NWEC also agrees with staff's reasoning and does not oppose a one-time limited-issue rate filing.
Thanks,
Diego
Diego Rivas
Regulatory Counsel
NW Energy Coalition
[phone]
From: Ed Jewell <[e-mail]>
Sent: Wednesday, March 20, 2024 9:16 AM
To: Peter Richardson<[e-mail]>;Terri Carlock<[e-mail]>; Nordstrom, Lisa
<[e-mail]>; Chris Burdin <[e-mail]>;Taylor Thomas
<[e-mail]>; Donn English<[e-mail]>; Mike Louis
<[e-mail]>; Chris McEwan <[e-mail]>; [e-mail]
<[e-mail]>; Brad Heusinkveld <[e-mail]>; Diego Rivas
<[e-mail]>; Don Reading<[e-mail]>; kelsey<[e-mail]>;
[e-mail] <[e-mail]>; Courtney White
<[e-mail]>; Darrell Early<[e-mail]>; Wil Gehl <[e-mail]>;
Anderson, Paige<[e-mail]>; Meier, Peter E.<[e-mail]>;
[e-mail] <[e-mail]>;Tom Arkoosh <[e-mail]>;
Erin Cecil<[e-mail]>; [e-mail] <[e-mail]>; [e-mail]
4

<[e-mail]>;Thor Nelson <[e-mail]>;Austin W.Jensen
<[e-mail]>; Austin Rueschhoff<[e-mail]>;Adele Lee
<[e-mail]>; [e-mail] <[e-mail]>; [e-mail]
<[e-mail]>; [e-mail] <[e-mail]>;
[e-mail] <[e-mail]>; Dayn Hardie <[e-mail]>
Cc: Goicoechea Allen, Megan <[e-mail]>;Tatum,Tim <[e-mail]>; Larkin,
Matt<[e-mail]>;Aschenbrenner, Connie<[e-mail]>; Walker, Donovan
<[e-mail]>
Subject: RE: [External] RE: Upcoming Idaho Power rate proceeding (Case No. IPC-E-24-07)
Thanks Terri.The City supports this approach in this proceeding.
-Ed
From: Peter Richardson <[e-mail]>
Sent: Wednesday, March 20, 2024 9:04 AM
To:Terri Carlock<[e-mail]>; Nordstrom, Lisa <[e-mail]>; Chris Burdin
<[e-mail]>;Taylor Thomas<[e-mail]>; Donn English
<[e-mail]>; Mike Louis<[e-mail]>; Chris McEwan
<[e-mail]>; [e-mail]; Brad Heusinkveld
<[e-mail] >; Diego Rivas<[e-mail]>; Don Reading
<[e-mail]>; kelsey<[e-mail]>; [e-mail]; Courtney White
<[e-mail]>; Darrell Early<[e-mail] >; Ed Jewell
<[e-mail]>;Wil Gehl <[e-mail]>; Anderson, Paige<[e-mail]>; Meier,
Peter E. <[e-mail]>; [e-mail]; Tom Arkoosh <[e-mail]>;
Erin Cecil<[e-mail]>; [e-mail]; [e-mail];Thor Nelson
<[e-mail]>; Austin W.Jensen <[e-mail]>;Austin Rueschhoff
<[e-mail]>; Adele Lee<ACLee@hol land hart.com>; [e-mail];
[e-mail]; [e-mail]; [e-mail]; Dayn Hardie
<[e-mail]>
Cc: Goicoechea Allen, Megan <[e-mail]>;Tatum,Tim <[e-mail]>; Larkin,
Matt<[e-mail]>;Aschenbrenner, Connie<[e-mail]>; Walker, Donovan
<[e-mail]>
Subject: [External] RE: Upcoming Idaho Power rate proceeding(Case No. IPC-E-24-07)
Caution:This email came from outside the city. Use caution before clicking on links, opening attachments, or
responding.
The Industrial Customers concur with Staff's reasoning and conclusion.
Peter Richardson
515 N. 27t"St.
Boise, ID 83702
[phone] m (direct dial)
[phone] (cell)
From:Terri Carlock<[e-mail]>
Sent:Tuesday, March 19, 2024 4:30 PM
To: Nordstrom, Lisa <[e-mail]>; Chris Burdin <[e-mail]>;Taylor Thomas
<[e-mail]>; Donn English<[e-mail]>; Mike Louis
<[e-mail]>; Chris McEwan <[e-mail]>; [e-mail]; Brad
5

Heusinkveld <[e-mail] >; Diego Rivas<[e-mail] >; Peter Richardson
<[e-mail]>; Don Reading<[e-mail]>; kelsey<[e-mail]>;
[e-mail]; Courtney White<[e-mail]>; Darrell Early
<[e-mail] >; Ed Jewell <[e-mail]>;Wil Gehl <[e-mail]>; Anderson, Paige
<[e-mail]>; Meier, Peter E.<[e-mail]>; [e-mail];Tom
Arkoosh <[e-mail]>; Erin Cecil<[e-mail]>; [e-mail];
[e-mail];Thor Nelson <[e-mail]>;Austin W.Jensen <[e-mail]>;
Austin Rueschhoff<[e-mail]>;Adele Lee <[e-mail]>; [e-mail];
[e-mail]; [e-mail]; [e-mail]; Dayn Hardie
<[e-mail]>
Cc: Goicoechea Allen, Megan <[e-mail]>;Tatum,Tim <[e-mail]>; Larkin,
Matt<[e-mail]>;Aschenbrenner, Connie<[e-mail]>; Walker, Donovan
<DWalker@ Ida hopower.com>
Subject: Upcoming Idaho Power rate proceeding (Case No. IPC-E-24-07)
Thank you for the discussions on the possibility of Idaho Power filing a Limited Issue General Rate Case. Staff
supports this type of a filing because rates became effective January 1,2024 for the most recent GRC.
As expected by all, Staff intends to conduct its standard review of the filing in this case for salaries and plant in
service in rate base including the appropriate weather normalization and revenue growth. We will verify
consistency across these issues for ratemaking purposes. The establishment of rates with a uniform percent
increase or a proposal based on existing cost of service will also be evaluated as the case proceeds. The 2023
Results of Operation adjusted for the last Stipulation and Order in IPC-E-23-11 will also be thoroughly analyzed.
am sending this to all interested participants as discussed and look forward to seeing the views of others.
Terri Carlock
Administrator Utilities Division
Idaho Public Utilities Commission
208-334-0356
From: Nordstrom, Lisa <[e-mail]>
Sent: Friday, March 8, 2024 2:07 PM
To: Chris Burdin <[e-mail]>;Terri Carlock<[e-mail]>;Taylor Thomas
<[e-mail]>; Donn English<[e-mail]>; Mike Louis
<[e-mail]>; Chris McEwan <[e-mail]>; [e-mail]; Brad
Heusinkveld <[e-mail] >; Diego Rivas<[e-mail] >; Peter Richardson
<peter@ rich ardsonadams.com>; Don Reading<[e-mail]>;Travis Culbertson
<[e-mail]>; kelsey<[e-mail]>; [e-mail]; Courtney
White<[e-mail]>; Darrell Early<[e-mail]>; Ed Jewell
<[e-mail]>; Wil Gehl <[e-mail]>; Anderson, Paige<[e-mail]>; Meier,
Peter E. <[e-mail]>; [e-mail]; Tom Arkoosh <[e-mail]>;
Erin Cecil <[e-mail]>; [e-mail]; [e-mail];Thor Nelson
<[e-mail]>; Austin W.Jensen <[e-mail]>;Austin Rueschhoff
<[e-mail]>; Adele Lee<ACLee@hol land hart.com>; [e-mail];
[e-mail]; [e-mail]; [e-mail]
Cc: Goicoechea Allen, Megan <[e-mail]>;Tatum,Tim <[e-mail]>; Larkin,
Matt<[e-mail]>;Aschenbrenner, Connie<[e-mail]>; Walker, Donovan
6

<DWaIker@ Ida hopower.com>
Subject:Slides re: Upcoming Idaho Power rate proceeding (Case No. IPC-E-24-07)
CAUTION:This email originated outside the State of Idaho network.Verify links and attachments BEFORE you click or open,even
if you recognize and/or trust the sender.Contact your agency service desk with any concerns.
Good afternoon,
Idaho Power appreciates the broad participation in yesterday's discussion about the possible structure of a future rate
case filing in Case No. IPC-E-24-07. As part of that discussion, the Company was asked to share the discussion slide deck
to facilitate the requested feedback to Idaho Power. Idaho Power is happy to do so if those who wish to receive a copy
will affirm that they will keep the sensitive information contained in the slide deck confidential and not share it with
third parties.
If you wish to receive a copy of the slide deck, please send your confidentiality affirmation to me and I will send it to you
directly.
Best,
Lisa
Lisa Nordstrom
LEAD COUNSEL
Idaho Power I Legal
Office 208-388-5825 1 Mobile [phone]
1121 W. Idaho St.I Boise, ID 1 83702
IDAHO POWER LEGAL DISCLAIMER
This transmission may contain information that is privileged, confidential and/or exempt from disclosure
under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure,
copying, distribution, or use of the information contained herein (including any reliance thereon) is
STRICTLY PROHIBITED. If you received this transmission in error, please immediately contact the sender
and destroy the material in its entirety, whether in electronic or hard copy format.Thank you.
7

N RHOPOWER.
LISA D. NORDSTROM
Lead Counsel
InordstromCcDidahopower.com
May 31, 2024
VIA ELECTRONIC FILING/HAND DELIVERY
Commission Secretary
Idaho Public Utilities Commission
11331 W. Chinden Blvd., Bldg 8,
Suite 201-A (83714)
PO Box 83720
Boise, Idaho 83720-0074
Re: Case No. IPC-E-24-07
Application of Idaho Power Company for Authority to Increase Rates for
Electric Service to Recover Costs Associated with Incremental Capital
Investments and Certain Ongoing Operations and Maintenance Expenses.
Dear Commission Secretary:
Attached for electronic filing is Idaho Power Company's ("Idaho Power")Application
and the Direct Testimonies and exhibits in the above matter.
Four (4) copies of Idaho Power Company's Application, Direct Testimonies, and
Exhibits will be hand delivered to the Commission today. The tariff schedules covering the
rendering of electric service and charges to Idaho Power's customers in the state of Idaho
to take effect thirty days after the filing of this Application, on and after July 1, 2024,
pursuant to Idaho Code § 61-307 and Procedural Rule 123.01 are included as Attachment
1 to the Application. Even though the Company has filed this case on May 31, 2024,
requesting implementation on July 1, 2024, as set forth in Idaho Code § 61-307, Idaho
Power expects the Commission will suspend implementation of the Company's proposed
rates for the statutory period set forth in Idaho Code § 61-622. With this expectation in
mind, the Company has framed its requested effective date as January 1, 2025, in all
discussions contained within this filing and for all related customer communication —
including the Company's press release and customer notice that accompany the
Application.
In addition, a disk containing Word versions of the testimonies is enclosed for the
Reporter.

Commission Secretary
Idaho Public Utilities Commission
May 31, 2024
Page 2
If you have any questions about any of the aforementioned documents, please do
not hesitate to contact me.
Very truly yours,
XL '4 ' 7r"r4t-,t,
Lisa D. Nordstrom
LDN:sg
Enclosures

CERTIFICATE OF ATTORNEY
ASSERTION THAT INFORMATION CONTAINED IN AN IDAHO PUBLIC UTILITIES
COMMISSION FILING IS PROTECTED FROM PUBLIC INSPECTION
Case No. IPC-E-24-07
Idaho Power Company's Application for Authority to Increase Rates for Electric
Service to Recover Costs Associated with Incremental Capital Investments and
Certain Ongoing Operations and Maintenance Expenses
The undersigned attorney, in accordance with Commission Rules of Procedure 67,
believes that portions of the Direct Testimony of Eric Hackett dated May 31, 2024, contain
information that Idaho Power Company and a third party claim are trade secrets, business
records of a private enterprise require by law to be submitted to or inspected by a public
agency, and/or public records exempt from disclosure by state or federal law (material
nonpublic information under U.S. Securities and Exchange Commission Regulation FD)
as described in Idaho Code § 74-101, et seq., and/or § 48-801, et seq. As such, it is
protected from public disclosure and exempt from public inspection, examination, or
copying.
DATED this 31 st day of May 2024.
LISA D. NORDSTROM
Attorney for Idaho Power Company

LISA D. NORDSTROM (ISB No. 5733)
DONOVAN E. WALKER (ISB No. 5921)
MEGAN GOICOECHEA ALLEN (ISB No. 7623)
Idaho Power Company
1221 West Idaho Street (83702)
P.O. Box 70
Boise, Idaho 83707
Telephone: [phone]
Facsimile: [phone]
Inordstrom(a)_idahopower.com
dwalker(@Jdahopower.com
mgoicoecheaallen(o)_idahopower.com
Attorneys for Idaho Power Company
BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF THE APPLICATION )
OF IDAHO POWER COMPANY TO ) CASE NO. IPC-E-24-07
INCREASE RATES FOR ELECTRIC )
SERVICE TO RECOVER COSTS ) APPLICATION
ASSOCIATED WITH INCREMENTAL )
CAPITAL INVESTMENTS AND )
CERTAIN ONGOING OPERATIONS )
AND MAINTENANCE EXPENSES. )
COMES NOW, Idaho Power Company ("Idaho Power" or "Company") and hereby
applies to the Idaho Public Utilities Commission ("Commission" or "IPUC"), pursuant to
Idaho Code §§ 61-307, 61-502, 61-524, and 61-622 and Commission Rules of
Procedure' 52, 121 , and 125, for an Order approving revision to Idaho Power's schedules
of rates for electric service in the state of Idaho. The Company requests an increase in
annual Idaho jurisdictional revenue of$99,293,220 to become effective January 1, 2025,
Idaho Administrative Procedures Act (IDAPA) 31.01.01.
APPLICATION - 1

which is the end of the initial statutory suspension period for proposed rate changes
pursuant to Idaho Code § 61-622(4) and Procedural Rule 123.03. If approved, this
request would result in an overall increase to adjusted base revenue of 7.31 percent.
In this case, Idaho Power is requesting rate relief related to a limited set of revenue
requirement categories, including 2024 incremental plant additions to rate base and
incremental ongoing labor costs, both as measured from the revenue requirement
approved by Order No. 36042 issued in the Company's last general rate case, IPC-E-23-
11 ('2023 GRC"). The Company's request applies the overall rate of return approved in
the 2023 GRC and does not seek to adjust any other revenue requirement components
such as non-labor operations and maintenance ("O&M") expense, net power supply
costs, other revenue, etc. Under the Company's proposal, base rates would continue to
reflect the 2023 GRC settlement amounts for those categories considered "out of scope"
for this case.
In support of this Application, Idaho Power represents as follows:
L BACKGROUND
1. Idaho Power is an Idaho corporation whose principal place of business is 1221
West Idaho Street, Boise, Idaho 83702.
2. Idaho Power is a public utility providing electric service to more than
630,000 customers in southern Idaho and approximately 20,000 customers in eastern
Oregon. Idaho Power is subject to the jurisdiction of this Commission, the Public Utility
Commission of Oregon, and the Federal Energy Regulatory Commission. In conducting
its utility business, Idaho Power operates an interconnected and vertically integrated
system.
APPLICATION - 2

3. Idaho Power continues to experience high growth in customer demand
requiring significant, ongoing capital investment necessary to maintain a safe, reliable
electric system into the future. Correspondingly, the Company believes that such growth
warrants careful consideration of appropriate ratemaking methodologies that balance
timely cost recovery with affordability for customers.
4. Idaho Power plans to invest nearly one billion dollars in its system in 2024
and an average of $796 million over the next five years to meet the growing customer
demand and to maintain a safe, reliable electric system. The associated incremental
depreciation and interest expense is of a level that Idaho Power cannot earn a reasonable
rate of return nor maintain sufficient cash flow metrics without the relief sought in this
case. The Company is also experiencing increased labor costs to attract and maintain a
skilled workforce and other inflationary pressures throughout its business. In short, the
revenue from current rates heretofore allowed Idaho Power is no longer reasonable and
adequate if Idaho Power is to maintain a stable financial condition and continue to render
reliable and adequate electric service to its customers.
5. As the Company developed its plan for this case, thoughtful recognition was
given to the fact that the Commission issued an order approving its last general rate case
just months ago. That general rate case involved a full audit and review of the Company's
financial information, over a decade of capital investment, rates of return, service levels,
cost-of-service studies, rate design, rules and regulations and more. Rather than starting
this process over again just months after the prior case concluded, the Company looked
specifically at what cost drivers must be addressed through an immediate rate request
and which revenue requirement components it could forego revisiting in the near-term by
APPLICATION - 3

applying diligent cost management. After consulting with the parties to the 2023 GRC, the
Company believes the targeted approach to cost recovery presented in this case will
provide timely cost recovery, while minimizing the rate increases customers might
otherwise experience with a full general rate case.
6. As a result, the Company is requesting the Commission provide relief as
proposed in this case so that the Company may fairly and timely recover the costs it incurs
on behalf of customers, including investments in the systems and activities necessary to
provide safe, reliable electric service. As more fully set forth herein and in the supporting
testimonies filled contemporaneously herewith, the requested rate increase is justified,
and the changes being sought by the Company in this case are fair, just, and reasonable
and should therefore be approved by the Commission.
II. PROPOSED TARIFFS
7. Attachment No. 1, included herewith and made a part hereof, is the
pertinent portions of Idaho Power's proposed new Electric Rate Schedules and Electric
Service Regulations, IPUC No. 30, Tariff No. 101, covering the rendering of electric
service and charges to Idaho Power's customers in the state of Idaho to take effect thirty
days after the filing of this Application, on and after July 1, 2024, pursuant to Idaho Code
§ 61-307 and Procedural Rule 123.01. Even though the Company has filed this case on
May 31, 2024, requesting implementation on July 1, 2024, as set forth in Idaho Code §
61-307, Idaho Power expects the Commission will suspend implementation of the
Company's proposed rates for the statutory period set forth in Idaho Code § 61-622. With
this expectation in mind, the Company has framed its requested effective date as January
APPLICATION -4

1, 2025, in all discussions contained within this filing and for all related customer
communication.
8. Attachment No. 2, included herewith and made a part hereof, contains those
portions of Idaho Power's current IPUC No. 30, Tariff No. 101, that the Company
proposes to modify as identified in legislative format.
III. PROPOSED RATE CHANGES & ACCOUNTING INFORMATION
9. Idaho Power is seeking rate relief related to a limited set of revenue
requirement categories, including 2024 incremental plant additions to rate base and
incremental ongoing labor costs, both as measured from the revenue requirement
approved by the Commission in the Company's 2023 GRC.
10. The Company's request applies the overall rate of return approved in the
2023 GRC and does not seek to adjust any other revenue requirement components such
as non-labor O&M expense, net power supply costs, other revenue, etc. Under the
Company's proposal, base rates would continue to reflect the 2023 GRC settlement
amounts for those categories considered "out of scope" for this case.
11. Idaho Power has excluded any expected 2024 capital projects associated
with the Jim Bridger Power Plant and the North Valmy Generating Station from the
incremental 2024 revenue requirement.
12. The request in this case relies on the class cost-of-service ("COSS") from
the 2023 GRC and does not propose any rate structural changes.
13. Attachment No. 3, included herewith and made a part hereof, shows a
comparison of revenues from the various rate schedules in Idaho Power's current IPUC
No. 30, Tariff No. 101 from both a base revenue and billed revenue perspective. As
APPLICATION - 5

summarized in the table below, the Company's proposed base rate increase results in
the following base revenue impacts to each customer segment.
Limited Scope Rate Case Request
Cost of Service Percent change — Revenue Spread (Exhibit 4)
Revenue Overall % Residential Small Large Large Irrigation
Change Impact General General Power 2
Service Service '
$99,293,220 7.31 7.25 7.30 6.83 6.50 9.50
Includes lighting schedules; z Includes special contracts.
14. The Commission directed the Company in Order No. 29414 issued in Case
No. IPC-E-03-11 to file accounting information related to its asset retirement obligations
in its general rate cases. While not a traditional general rate case, Attachment 4, included
herewith and made a part hereof, nonetheless contains journal entries made consistent
with Statement of Financial Accounting Standards 143, now codified in Accounting
Standards Codification section 410-20.
V. TESTIMONY IN SUPPORT
15. Idaho Power is prepared to immediately present its case in support of the
relief requested in the Application. Simultaneously with the filing of this Application, Idaho
Power has filed its direct case consisting of the Direct Testimonies of four witnesses and
Exhibit Nos. 1 through 10, which more fully describe the relief requested by the Company.
These witnesses and a brief summary of their testimonies are as follows:
• Mr. Tim Tatum, Vice President of Regulatory Affairs, covers the regulatory policy
matters related to the development of and need for this limited scope rate case
based on projected incremental 2024 capital investments and certain ongoing
O&M expenses. After providing a general overview of the case, he discusses Idaho
APPLICATION - 6

Power's current financial and operating situation driving the need for the requested
rate relief. Mr. Tatum also presents the Company's recommendation regarding the
derivation of class-specific revenue targets and development of rates.
• Mr. Matthew Larkin, Revenue Requirement Senior Manager, discusses the
development of the Idaho Results of Operations ("ROO") and the conclusions that
can be drawn from the analysis. Mr. Larkin also describes how the Company
utilized the 2023 GRC settlement as a starting point from which he made
adjustments to determine the 2024 incremental revenue requirement. His
testimony details each component of the Company's incremental revenue
requirement related to the update of capital and labor-related operations and
maintenance ("O&M") expense ("O&M Labor"), and how the Company calculated
the ultimate rate increase requested in this case. Mr. Larkin also supervised the
preparation of the jurisdictional separation study utilized to determine the Idaho
jurisdictional incremental revenue requirement.
• Mr. Eric Hackett, Projects and Resource Development Director, discusses
generation-related major projects, as well as an environmental-related major
project, expected to be complete during 2024. He presents the prudent nature of
these investments, detailing why they are needed to ensure Idaho Power's
generation fleet is robust and well-positioned to provide continued safe, reliable
service to customers. Mr. Hackett also presents the costs associated with the
utility-scale battery projects placed into service in 2024 and explains why the
investment in these facilities reflects the least-cost, least-risk option to ensure
sufficient capacity to meet customer demand in 2024 and beyond.
APPLICATION - 7

• Mr. Mitch Colburn, Vice President of Planning, Engineering, and Construction,
discusses investments the Company has made in the electrical grid to ensure the
provision of safe, reliable service to customers. Mr. Colburn presents the
transmission and distribution-related investments included in 2024 that
demonstrate the Company's prudent investment in the electrical grid at the
transmission and distribution levels. He also discusses the Wood River Valley
Reliability Project, a combined distribution and transmission project, the
distribution portion of those investments which are proposed for recovery in this
case. Mr. Colburn concludes with a discussion of a project resulting from the
Company's grid modernization initiative.
16. Portions of the Company's Application and accompanying testimonies and
exhibits are based on computer models. Additional documentation and explanation are
provided with testimonies and exhibits in this filing, as well as workpapers to be submitted
as directed by the Commission Secretary. As envisioned by Rule of Procedure 121.02,
further information can be provided upon request.
VI. EFFECTIVE DATE
17. This Application, including Attachment Nos. 1 through 4, is filed with this
Commission to be kept open for public inspection as required by law, and the same fully
states the changes to be made in the schedules, regulations, and contract rates now in
force. The new Electric Rate Schedules and Electric Service Regulations in
Attachment No. 1 will become effective as Applicant's IPUC No. 30, Tariff No. 101, for
service rendered on and after July 1, 2024, unless otherwise ordered by this Commission,
and when effective, will supersede and cancel the Electric Rate Schedules now in effect.
APPLICATION - 8

Even though the Company has filed this case on May 31, 2024, requesting
implementation on July 1, 2024, as set forth in Idaho Code § 61-307, Idaho Power
anticipates the Commission will suspend the effective date of its requested tariff changes
until January 1 , 2025, pursuant to Idaho Code § 61-622.
18. While the proposed changes reflected in Attachment Nos. 1 and 2 were
based on tariffs in effect May 29, 2024, Idaho Power expects tariffs complying with the
final order issued in this case may reflect additional tariff changes for the following
schedules that may become effective in the interim:
• Schedule 20 (Case No. IPC-E-24-15, Update to Marginal Pricing)
• Schedule 34 (Case No. IPC-E-24-15, Update to Marginal Pricing)
Idaho Power will incorporate all other changes approved by the Commission after May
29, 2024, into the tariffs submitted in compliance with the Commission's final order in this
case.
VII. PUBLIC NOTICE
19. This Application has been and will be brought to the attention of Idaho
Power's affected customers by means of a press release, which will be sent to various
media outlets, including the newspapers of general circulation in the area served by Idaho
Power, by customer notices mailed to individual customers, and by means of personal
contact with some customers. A copy of the press release and customer notice required
by Procedural Rule 125 accompany this Application.
20. In addition, the affected current Electric Rate Schedules, Electric Service
Regulations, including rate schedules for the special contracts, together with the
proposed Electric Rate Schedules, Electric Service Regulations, including rate schedules
APPLICATION - 9

for the special contract customers, will be kept open for public inspection at Idaho Power's
offices in the state of Idaho.
21. Idaho Power believes the above-described procedures satisfy the
Commission's Rules of Practice and Procedure, but Idaho Power will, in the alternative,
bring this Application to the attention of Idaho Power's affected customers through any
other means directed by this Commission.
VIII. COMMUNICATIONS
22. Communications with reference to this Application should be sent to the
following:
Lisa D. Nordstrom Timothy Tatum
Donovan E. Walker Connie Aschenbrenner
Megan Goicoechea Allen Matt Larkin
Idaho Power Company 1221 West Idaho Street (83702)
P.O. Box 70 P.O. Box 70
Boise, Idaho 83707 Boise, ID 83707
Inordstrom(@Jdahopower.com ttatum idahopower.com
dwalker(c�idahopower.com caschenbrennerCcD_idahopower.com
mgoicoecheaallen(cr,.idahopower.com mlarkinCcbidahopower.com
docketsCa-)_idahopower.com
IX. REQUEST FOR RELIEF
23. WHEREFORE, the revenue requirement heretofore allowed Idaho Power is
no longer reasonable and adequate, and Idaho Power has and will continue to experience
increased costs — all of which now require immediate adjustment by way of increased
revenues if Idaho Power is to maintain a stable financial condition and continue to render
reliable and adequate electric service to its customers.
24. Idaho Power respectfully requests the Commission issue its Order finding
the proposed rates and charges to be fair, just, reasonable, and nondiscriminatory. Idaho
Power asks the Commission to approve the new Electric Rate Schedules, Electric Service
APPLICATION - 10

Regulations, and special contract rates set out in Attachment No. 1. If approved, Idaho
Power's annual Idaho jurisdictional revenues would increase by $99,293,220, and result
in an overall increase to adjusted base revenue of 7.31 percent.
DATED at Boise, Idaho, this 31 st day of May 2024.
LISA D. NORDSTROM
Attorney for Idaho Power Company
DONOVAN E. WALKER
Attorney for Idaho Power Company
MEGAN GOICOECHEA ALLEN
Attorney for Idaho Power Company
APPLICATION - 11

APPLICANT'S STATEMENT OF READINESS FOR HEARING
LISA D. NORDSTROM, one of the attorneys of record for Idaho Power, pursuant
to Rule of Procedure 121.01(d) hereby states that Idaho Power is prepared to immediately
present its case in support of the relief requested in the Application.
Lisa D. Nordstrom
APPLICANT'S STATEMENT OF READINESS FOR HEARING

BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION
CASE NO. IPC-E-24-07
IDAHO POWER COMPANY
ATTACHMENT NO. 1
PROPOSED TARIFF

Idaho Power Company First Revised Sheet No. 1-2
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 1-2
SCHEDULE1
RESIDENTIAL SERVICE
STANDARD PLAN
(Continued)
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 54 (Fixed Cost Adjustment), Schedule 55 (Power Cost Adjustment), Schedule 91
(Energy Efficiency Rider), Schedule 95 (Adjustment for Municipal Franchise Fees), Schedule 96 (Blaine
County Surcharge to Fund the Undergrounding of Certain Facilities), and Schedule 98 (Residential and
Small Farm Energy Credit).
Summer Non-summer
Service Charge, per month $15.00 $15.00
Energy Charge, per kWh
First 800 kWh 10.36710 9.12360
801-2000 kWh 12.46590 10.05850
All Additional kWh Over 2000 14.80820 11.13970
PAYMENT
The monthly bill rendered for service supplied hereunder is payable upon receipt, and becomes
past due 15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 3-1
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 3-1
SCHEDULE 3
MASTER-METERED MOBILE HOME PARK
RESIDENTIAL SERVICE
AVAILABILITY
Service under this schedule is available to master-metered mobile home parks included on the
Company's list of "grandfathered" mobile home parks on file with the Idaho Public Utilities Commission
receiving electric service under Schedule 1 as of March 20, 2009. Customers included on the Company's
list of "grandfathered" mobile home parks as of March 20, 2009 will automatically be transferred to this
Schedule on their next regularly scheduled cycle read date that occurs on or after March 21, 2009.
APPLICABILITY
Service under this schedule is applicable to Electric Service provided to a master-metered
residential mobile home park for residential service for general domestic uses, including single phase
motors of 7'/2 horsepower rating or less. This schedule is not applicable to standby service or shared
service.
TYPE OF SERVICE
The type of service provided under this schedule is single phase, alternating current at
approximately 120 or 240 volts and 60 cycles, supplied through one meter at one Point of Delivery.
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges and may also include charges as set
forth in Schedule 54 (Fixed Cost Adjustment), Schedule 55 (Power Cost Adjustment), Schedule 91
(Energy Efficiency Rider), Schedule 95 (Adjustment for Municipal Franchise Fees), Schedule 96 (Blaine
County Surcharge to Fund the Undergrounding of Certain Facilities), and Schedule 98 (Residential and
Small Farm Energy Credit):
Service Charge, per month $15.00
Energy Charge, per kWh
all kWh 11.11840
Minimum Charge
The monthly Minimum Charge shall be the sum of the Service Charge, the Energy Charge, and
the Power Cost Adjustment.
PAYMENT
The monthly bill rendered for service supplied hereunder is payable upon receipt, and becomes
past due 15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 5-2
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 5-2
SCHEDULE 5
RESIDENTIAL SERVICE
TIME-OF-USE PLAN
(OPTIONAL)
(Continued)
TIME PERIODS
The time periods are defined as follows. All times are stated in Mountain Time.
Summer Season
On-Peak: 7:00 p.m. to 11:00 pm. Monday through Saturday, except holidays
Mid-Peak 3:00 p.m. to 7:00 p.m. Monday through Saturday, except holidays
Off-Peak: 11:00 p.m. to 3:00 p.m. Monday through Saturday and all hours on Sunday and
holidays
Non-summer Season
On-Peak: 6:00 a.m. to 9:00 a.m. and 5:00 p.m. to 8:00 p.m. Monday through Saturday,
except holidays
Off-Peak: 9:00 a.m. to 5:00 p.m. and 8:00 p.m. to 6:00 a.m. Monday through Saturday and
all hours on Sunday and holidays
Holidays are New Year's Day (January 1), Memorial Day (last Monday in May), Independence
Day (July 4), Labor Day (first Monday in September), Thanksgiving Day (fourth Thursday in November),
and Christmas Day (December 25). When New Year's Day, Independence Day, or Christmas Day falls
on Sunday, the Monday immediately following that Sunday will be considered a holiday.
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 54 (Fixed Cost Adjustment), Schedule 55 (Power Cost Adjustment), Schedule 91
(Energy Efficiency Rider), Schedule 95 (Adjustment for Municipal Franchise Fees), Schedule 96 (Blaine
County Surcharge to Fund the Undergrounding of Certain Facilities), and Schedule 98 (Residential and
Small Farm Energy Credit).
Summer Non-summer
Service Charge, per month $15.00 $15.00
Energy Charge, per kWh
On-Peak 25.73390 13.34210
Mid-Peak 12.86720 n/a
Off-Peak 6.43350 8.89470
PAYMENT
The monthly bill rendered for service supplied hereunder is payable upon receipt, and becomes
past due 15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 6-9
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 6-9
SCHEDULE 6
RESIDENTIAL SERVICE
ON-SITE GENERATION
(Continued)
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set forth
in Schedule 54 (Fixed Cost Adjustment), Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy
Efficiency Rider), Schedule 95 (Adjustment for Municipal Franchise Fees), Schedule 96 (Blaine County
Surcharge to Fund the Undergrounding of Certain Facilities), and Schedule 98 (Residential and Small Farm
Energy Credit).
The following rate structure and charges are subject to change upon Commission approval:
STANDARD RATES (DEFAULT)
Summer Non-summer
Service Charge, per month $15.00 $15.00
Energy Charge, per kWh
First 800 kWh 10.36710 9.12360
801-2000 kWh 12.46590 10.05850
All Additional kWh Over 2000 14.80820 11.13970
TIME-OF-USE RATES (OPTIONAL)
Summer Non-summer
Service Charge, per month $15.00 $15.00
Energy Charge, per kWh
On-Peak 25.73390 13.34210
Mid-Peak 12.86720 n/a
Off-Peak 6.43350 8.89470
EXPORT CREDIT RATE
The following rate structure and credits are subject to change upon Commission approval:
Summer Non-summer
Export Credit Rate, per kWh
On-Peak 16.99660 4.83650
Off-Peak 5.65330 4.83650
PAYMENT
The monthly bill rendered for service supplied hereunder is payable upon receipt, and becomes
past due 15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 7-2
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 7-2
SCHEDULE 7
SMALL GENERAL SERVICE
(Continued)
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 54 (Fixed Cost Adjustment), Schedule 55 (Power Cost Adjustment), Schedule 91
(Energy Efficiency Rider), Schedule 95 (Adjustment for Municipal Franchise Fees), Schedule 96 (Blaine
County Surcharge to Fund the Undergrounding of Certain Facilities), and Schedule 98 (Residential and
Small Farm Energy Credit).
Summer Non-summer
Service Charge, per month $25.00 $25.00
Energy Charge, per kWh
First 300 kWh 7.70420 7.70420
All Additional kWh 8.80420 7.70610
PAYMENT
The monthly bill rendered for service supplied hereunder is payable upon receipt, and becomes
past due 15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 8-8
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 8-8
SCHEDULE8
SMALL GENERAL SERVICE
ON-SITE GENERATION
(Continued)
MONTHLY CHARGE (Continued)
The following charges are subject to change upon Commission approval:
Summer Non-summer
Service Charge, per month $25.00 $25.00
Energy Charge, per kWh
First 300 kWh 7.70420 7.70420
All Additional kWh 8.80420 7.70610
EXPORT CREDIT RATE
The following rate structure and credits are subject to change upon Commission approval:
Summer Non-summer
Export Credit Rate, per kWh
On-Peak 16.99660 4.83650
Off-Peak 5.65330 4.83650
PAYMENT
The monthly bill rendered for service supplied hereunder is payable upon receipt, and becomes
past due 15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 9-4
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 9-4
SCHEDULE 9
LARGE GENERAL SERVICE
(Continued)
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), Schedule 95
(Adjustment for Municipal Franchise Fees), Schedule 96 (Blaine County Surcharge to Fund the
Undergrounding of Certain Facilities), and Schedule 98 (Residential and Small Farm Energy Credit).
SECONDARY SERVICE — STANDARD RATES Summer Non-summer
(DEFAULT)
Service Charge, per month $25.00 $25.00
Basic Charge, per kW of Basic Load Capacity
Basic Load Capacity $1.59 $1.59
Demand Charge, per kW of Billing Demand
Billing Demand $8.20 $6.47
Energy Charge, per kWh
All kWh 5.52380 5.32810
SECONDARY SERVICE —TIME-OF-USE Summer Non-summer
(OPTIONAL)
Service Charge, per month $25.00 $25.00
Basic Charge, per kW of Basic Load Capacity
Basic Load Capacity $1.59 $1.59
Demand Charge, per kW of Billing Demand
Billing Demand $8.20 $6.47
Energy Charge, per kWh
On-Peak 5.91010 5.63390
Mid-Peak 5.91010 5.38170
Off-Peak 5.32620 5.18090
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 9-5
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 9-5
SCHEDULE 9
LARGE GENERAL SERVICE
(Continued)
PRIMARY SERVICE Summer Non-summer
Service Charge, per month $340.00 $340.00
Basic Charge, per kW of
Basic Load Capacity $1.85 $1.85
Demand Charge, per kW of
Billing Demand $8.44 $8.00
On-Peak Demand Charge, per kW of
On-Peak Billing Demand $1.59 n/a
Energy Charge, per kWh
On-Peak 5.44940 4.94890
Mid-Peak 5.44940 4.70580
Off-Peak 4.88580 4.51080
TRANSMISSION SERVICE Summer Non-summer
Service Charge, per month $340.00 $340.00
Basic Charge, per kW of
Basic Load Capacity $1.10 $1.10
Demand Charge, per kW of
Billing Demand $7.44 $6.52
On-Peak Demand Charge, per kW of
On-Peak Billing Demand $1.59 n/a
Energy Charge, per kWh
On-Peak 5.37580 4.84870
Mid-Peak 5.37580 4.60500
Off-Peak 4.80540 4.40970
PAYMENT
The monthly bill rendered for service supplied hereunder is payable upon receipt, and becomes
past due 15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 15-2
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 15-2
SCHEDULE 15
DUSK TO DAWN CUSTOMER
LIGHTING
(Continued)
NEW FACILITIES
Where facilities of the Company are not presently available for a lighting fixture installation
which will provide satisfactory lighting service for the Customer's Premises, the Company may install
overhead or underground secondary service facilities, including secondary conductor, poles, anchors,
etc., a distance not to exceed 300 feet to supply the desired service, all in accordance with the charges
specified below.
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), and Schedule 95
(Adjustment for Municipal Franchise Fees).
1. Monthly Per Unit Charge on existing facilities:
AREA LIGHTING
LED Fixture
Watt (Maximum) Lumen (Minimum) Base Rate
40 3,600 $ 9.80
85 7,200 $11.90
200 18,000 $17.20
FLOOD LIGHTING
LED Fixture
Watt (Maximum) Lumen (Minimum) Base Rate
85 8,100 $19.43
150 18,000 $21.42
300 32,000 $25.18
2. For New Facilities Installed Before June 1, 2004: The Monthly Charge for New Facilities
installed prior to June 1, 2004, will continue to be assessed a monthly facilities charge in accordance
with the changes specified in Schedule 66.
3. For New Facilities Installed On or After June 1, 2004: The non-refundable charge for
New Facilities to be installed, such as underground service, overhead secondary conductor, poles,
anchors, etc., shall be equal to the work order cost.
PAYMENT
The monthly bill for service supplied hereunder is payable upon receipt, and becomes past due
15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective—January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 19-3
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 19-3
SCHEDULE 19
LARGE POWER SERVICE
(Continued)
FACILITIES BEYOND THE POINT OF DELIVERY
At the Customer's request and at the option of the Company, transformers and other facilities
installed beyond the Point of Delivery to provide Primary or Transmission Service may be owned,
operated, and maintained by the Company in consideration of the Customer paying a Facilities Charge
to the Company. This service is provided under the provisions set forth in Rule M, Facilities Charge
Service.
POWER FACTOR ADJUSTMENT
Where the Customer's Power Factor is less than 90 percent, as determined by measurement
under actual load conditions,the Company may adjust the kW measured to determine the Billing Demand
by multiplying the measured kW by 90 percent and dividing by the actual Power Factor.
TEMPORARY SUSPENSION
When a Customer has properly invoked Rule G, Temporary Suspension of Demand, the Basic
Load Capacity, the Billing Demand, and the On-Peak Billing Demand shall be prorated based on the
period of such suspension in accordance with Rule G. In the event the Customer's metered demand is
less than 1,000 kW during the period of such suspension, the Basic Load Capacity and Billing Demand
will be set equal to 1,000 kW for purposes of determining the Customer's Monthly Charge.
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), Schedule 95
(Adjustment for Municipal Franchise Fees), and Schedule 96 (Blaine County Surcharge to Fund the
Undergrounding of Certain Facilities).
SECONDARY SERVICE Summer Non-summer
Service Charge, per month $85.00 $85.00
Basic Charge, per kW of
Basic Load Capacity $2.04 $2.04
Demand Charge, per kW of
Billing Demand $10.60 $8.54
On-Peak Demand Charge, per kW of
On-Peak Billing Demand $1.83 n/a
Energy Charge, per kWh
On-Peak 6.04670 5.47470
Mid-Peak 6.04670 5.23040
Off-Peak 5.48410 5.03450
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 19-4
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 19-4
SCHEDULE 19
LARGE POWER SERVICE
(Continued)
MONTHLY CHARGE (Continued)
PRIMARY SERVICE Summer Non-summer
Service Charge, per month $415.00 $415.00
Basic Charge, per kW of $2.24 $2.24
Basic Load Capacity
Demand Charge, per kW of $10.14 $8.72
Billing Demand
On-Peak Demand Charge, per kW of
On-Peak Billing Demand $1.61 n/a
Energy Charge, per kWh
On-Peak 5.27670 4.77020
Mid-Peak 5.27670 4.52580
Off-Peak 4.71340 4.32970
TRANSMISSION SERVICE Summer Non-summer
Service Charge, per month $415.00 $415.00
Basic Charge, per kW of
Basic Load Capacity $1.89 $1.89
Demand Charge, per kW of
Billing Demand $10.30 $8.86
On-Peak Demand Charge, per kW of
On-Peak Billing Demand $1.61 n/a
Energy Charge, per kWh
On-Peak 5.25980 4.74040
Mid-Peak 5.25980 4.49580
Off-Peak 4.69320 4.29960
PAYMENT
The monthly bill for service supplied hereunder is payable upon receipt, and becomes past due
15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 20-6
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 20-6
SCHEDULE 20
SPECULATIVE HIGH-DENSITY LOAD
(Continued)
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 91 (Energy Efficiency Rider), and Schedule 95 (Adjustment for Municipal Franchise
Fees).
Large General Service Rates
PRIMARY SERVICE Summer Non-summer
Service Charge, per month $340.00 $340.00
Basic Charge, per kW of $1.85 $1.85
Basic Load Capacity
Demand Charge, per kW of $8.98 $8.54
Billing Demand
Energy Charge, per kWh
On-Peak 9.22890 6.78050
Mid-Peak 11.94890 8.50660
Off-Peak 6.89190 7.19750
TRANSMISSION SERVICE Summer Non-summer
Service Charge, per month $340.00 $340.00
Basic Charge, per kW of
Basic Load Capacity $1.10 $1.10
Demand Charge, per kW of
Billing Demand $7.98 $7.06
Energy Charge, per kWh
On-Peak 9.15530 6.68030
Mid-Peak 11.87530 8.40580
Off-Peak 6.81150 7.09640
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 20-7
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 20-7
SCHEDULE 20
SPECULATIVE HIGH-DENSITY LOAD
(Continued)
MONTHLY CHARGE (Continued)
Large Power Service Rates
PRIMARY SERVICE Summer Non-summer
Service Charge, per month $415.00 $415.00
Basic Charge, per kW of $2.24 $2.24
Basic Load Capacity
Demand Charge, per kW of $10.67 $9.25
Billing Demand
Energy Charge, per kWh
On-Peak 9.05100 6.59660
Mid-Peak 11.77100 8.32140
Off-Peak 6.71430 7.01120
TRANSMISSION SERVICE Summer Non-summer
Service Charge, per month $415.00 $415.00
Basic Charge, per kW of
Basic Load Capacity $1.89 $1.89
Demand Charge, per kW of
Billing Demand $10.83 $9.39
Energy Charge, per kWh
On-Peak 9.03410 6.56680
Mid-Peak 11.75410 8.29140
Off-Peak 6.69410 6.98110
PAYMENT
The monthly bill for service supplied hereunder is payable upon receipt, and becomes past due
15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 24-3
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 24-3
SCHEDULE 24
AGRICULTURAL IRRIGATION
SERVICE
(Continued)
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), Schedule 95
(Adjustment for Municipal Franchise Fees), Schedule 96 (Blain County Surcharge to Fund the
Undergrounding of Certain Facilities), and Schedule 98 (Residential and Small Farm Energy Credit).
SECONDARY SERVICE In-Season Out-of-Season
Service Charge, per month $30.00 $6.00
Demand Charge, per kW of
Billing Demand $15.42 n/a
Energy Charge
All kWh 6.28190 7.38070
TRANSMISSION SERVICE In-Season Out-of-Season
Service Charge, per month $415.00 $6.00
Demand Charge, per kW of
Billing Demand $14.56 n/a
Energy Charge
All kWh 6.01630 7.04370
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 26-1
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 26-1
SCHEDULE 26
IDAHO POWER COMPANY
ELECTRIC SERVICE RATE
FOR
MICRON TECHNOLOGY, INC.
BOISE, IDAHO
SPECIAL CONTRACT DATED MARCH 9, 2022, AMENDED MAY 31, 2023
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), and Schedule 95
(Adjustment for Municipal Franchise Fees). Terms used below have the meanings given to them in the
Special Contract referenced above.
Monthly Contract Demand Charge
$3.47 per kW of Contract Demand.
Monthly Billing Demand Charge
$18.31 per kW of Billing Demand but not less than Minimum Monthly Billing Demand.
Minimum Monthly Billing Demand
The Minimum Monthly Billing Demand will be 25,000 kilowatts.
Daily Excess Demand Charge
$1.375 per each kW over the Contract Demand.
Monthly Energy Charge
3.03940 per kWh.
Embedded Energy Fixed Cost Charge
0.00000 per kWh of Renewable Resource On-Site Usage
Monthly Adjusted Renewable Capacity Credit(s)
See Table Nos.1, 2, 3, and Revised Exhibit 1 of Micron's Special Contract, dated March 9, 2022,
as amended.
Renewable Resource Cost
As defined in Revised Exhibit 1 of Micron's Special Contract, dated March 9, 2022, as amended.
Excess Generation Credit
As defined in Revised Exhibit 1 of Micron's Special Contract, dated March 9, 2022, as amended.
Administrative Charge
As defined in Revised Exhibit 1 of Micron's Special Contract, dated March 9, 2022, as amended.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 29-1
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 29-1
SCHEDULE 29
IDAHO POWER COMPANY
ELECTRIC SERVICE RATE
FOR
J. R. SIMPLOT COMPANY
POCATELLO, IDAHO
SPECIAL CONTRACT DATED JUNE 29, 2004
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), and Schedule 95
(Adjustment for Municipal Franchise Fees).
Contract Demand Charge
$3.25 per kW of Contract Demand
Demand Charge,
$14.88 per kW of Billing Demand but no less than the Contract Demand less 5,000 kW
Daily Excess Demand Charge
$1.301 per each kW over the Contract Demand
Energy Charge
3.12600 per kWh
Monthly Facilities Charge
Facilities installed beyond the Point of Delivery will be subject to the provisions of Rule M,
Facilities Charge Service.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 30-1
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 30-1
SCHEDULE 30
IDAHO POWER COMPANY
ELECTRIC SERVICE RATE
FOR
UNITED STATES DEPARTMENT OF ENERGY
IDAHO OPERATIONS OFFICE
SPECIAL CONTRACT DATED SEPTEMBER 15, 2021
CONTRACT NO. 47PA0420D0011
AVAILABILITY
This schedule is available for firm retail service of electric power and energy delivered for the
operations of the Department of Energy's facilities located at the Idaho National Engineering Laboratory
site, as provided in the Contract for Electric Service between the parties.
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), and Schedule 95
(Adjustment for Municipal Franchise Fees).
1. Demand Charge, per kW of
Billing Demand $10.12
2. Energy Charge, per kWh 4.25340
SPECIAL CONDITIONS
1. Billing Demand. The Billing Demand shall be the average kW supplied during the 30-
minute period of maximum use during the month.
2. Power Factor Adjustment. When the Power Factor is less than 95 percent during the 30-
minute period of maximum load for the month, Company may adjust the measured Demand to determine
the Billing Demand by multiplying the measured kW of Demand by 0.95 and dividing by the actual Power
Factor.
MONTHLY ANTELOPE ASSET CHARGE ("AAC")
The AAC will be paid for the Company's investment in, and operation and maintenance expenses
associated with, specified transmission facilities required to provide service under the contract.
The Monthly AAC consists of two components:
1. PacifiCorp Pass-Through Charge (PPTC):
PPTC = (O&M x GAV) + (CEC)
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 32-1
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 32-1
SCHEDULE 32
IDAHO POWER COMPANY
ELECTRIC SERVICE RATE
FOR
J. R. SIMPLOT COMPANY
CALDWELL, IDAHO
SPECIAL CONTRACT DATED APRIL 8, 2015
SUMMER AND NON-SUMMER SEASONS
The summer season begins on June 1 of each year and ends on September 30 of each year.
The non-summer season begins on October 1 of each year and ends on May 31 of each year.
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), and Schedule 95
(Adjustment for Municipal Franchise Fees).
Summer Non-Summer
Contract Demand Charge
per kW of Contract Demand $3.33 $3.33
Demand Charge
per kW of Billing Demand but no less
than the Contract Demand less 10,000 kW $19.80 $16.37
Daily Excess Demand Charge
per each kW over the Contract Demand $1.332 $1.332
Energy Charge
per kWh 3.07110 3.31750
Monthly Facilities Charge
Facilities installed beyond the Point of Delivery will be subject to the provisions of Rule M,
Facilities Charge Service.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 33-2
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 33-2
SCHEDULE 33
IDAHO POWER COMPANY
ELECTRIC SERVICE RATE
FOR
BRISBIE, LLC.
(Continued)
TIME PERIODS (Continued)
The holidays observed by the Company are New Year's Day (January 1), Memorial Day (last
Monday in May), Independence Day (July 4), Labor Day, Thanksgiving Day (fourth Thursday in
November), and Christmas Day (December 25). When New Year's Day, Independence Day, or
Christmas Day falls on a Sunday, the Monday immediately following that Sunday will be considered a
holiday.
SUMMER AND NON-SUMMER SEASONS
The summer season begins on June 1 of each year and ends on September 30 of each year.
The non-summer season begins on October 1 of each year and ends on May 31 of each year.
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), and Schedule 95
(Adjustment for Municipal Franchise Fees).
Summer Non-summer
Service Charge, per month $415.00 $415.00
Basic Charge, per kW of
Basic Load Capacity $1.89 $1.89
Demand Charge, per kW of
Billing Demand $10.30 $8.86
On-Peak Demand Charge, per kW of
On-Peak Billing Demand $1.61 n/a
Energy Charge, per kWh
On-Peak 5.25980 4.74040
Mid-Peak 5.25980 4.49580
Off-Peak 4.69320 4.29960
Embedded Energy Fixed Cost Rate, per kWh
On-Peak 0.69510 1.55690
Mid-Peak 0.69510 1.55690
Off-Peak 0.69510 1.55690
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 33-3
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 33-3
SCHEDULE 33
IDAHO POWER COMPANY
ELECTRIC SERVICE RATE
FOR
BRISBIE, LLC.
(Continued)
BLOCK 2
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set forth in
Schedule 91 (Energy Efficiency Rider), and Schedule 95 (Adjustment for Municipal Franchise Fees).
Terms used below have the meanings given to them in the Special Contract referenced above.
Daily Excess Demand Charge
$1.333 per each kW over the Contract Demand.
Excess Generation Credit
As defined in Revised Exhibit 3.1 of Brisbie, LLC's Special Contract, December 22, 2021 as
amended.
Monthly Contract Demand Charge
$3.33 per kW of Contract Demand.
Monthly Billing Demand Charge
$22.51 per kW of Billing Demand but not less than Minimum Monthly Billing Demand.
Minimum Monthly Billing Demand
The Minimum Monthly Billing Demand will be 20,000 kilowatts.
Monthly Adjusted Renewable Capacity Credit(s)
See Table Nos. 1, 2, 3, and Revised Exhibit 3.1 of Brisbie, LLC's Special Contract, dated
December 22, 2021, as amended.
Renewable Resource Cost
As included in the Monthly Contract Payment listed in Revised Exhibit 3.1 of Brisbie, LLC's Special
Contract, December 22, 2021, as amended.
Supplemental Energy Cost
As defined in Revised Exhibit 3.1 of Brisbie, LLC's Special Contract, December 22, 2021, as
amended.
Administrative Charge
As defined in Revised Exhibit 3.1 of Brisbie, LLC's Special Contract, December 22, 2021, as
amended.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 34-3
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 34-3
SCHEDULE 34
IDAHO POWER COMPANY
ELECTRIC SERVICE RATE
FOR
LAMB WESTON, INC.
(Continued)
SUMMER AND NON-SUMMER SEASONS
The summer season begins on June 1 of each year and ends on September 30 of each year. The
non-summer season begins on October 1 of each year and ends on May 31 of each year.
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), and Schedule 95
(Adjustment for Municipal Franchise Fees).
Summer Non-summer
Service Charge, per month $415.00 $415.00
Basic Charge, per kW of
Basic Load Capacity $2.24 $2.24
Demand Charge, per kW of
Billing Demand $10.14 $8.72
On-Peak Demand Charge, per kW of
On-Peak Billing Demand $1.61 n/a
Energy Charge, per kWh
On-Peak 5.27670 4.77020
Mid-Peak 5.27670 4.52580
Off-Peak 4.71340 4.32970
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective - January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 34-4
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 34-4
SCHEDULE 34
IDAHO POWER COMPANY
ELECTRIC SERVICE RATE
FOR
LAMB WESTON, INC.
(Continued)
BLOCK 2
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set forth in
Schedule 91 (Energy Efficiency Rider), and Schedule 95 (Adjustment for Municipal Franchise Fees).
Daily Excess Demand Charge
$1.332 per each kW over the Contract Demand.
Monthly Contract Demand Charge
$3.33 per kW of Contract Demand.
Monthly Billing Demand Charge
$24.45 per kW of Billing Demand but not less than Minimum Monthly Billing Demand.
Energy Charge
5.86940 per kWh of Block 2 Energy.
Minimum Monthly Billing Demand
The Minimum Monthly Billing Demand will be 20,000 kilowatts.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective - January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 40-2
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 40-2
SCHEDULE 40
NON-METERED GENERAL SERVICE
(Continued)
MONTHLY CHARGE
The average monthly kWh of energy usage shall be estimated by the Company, based on the
Customer's electric equipment and one-twelfth of the annual hours of operation thereof. Since the
service provided is non-metered, failure of the Customer's equipment will not be reason for a reduction
in the Monthly Charge. The Monthly Charge shall be computed at the following rate, and may also
include charges as set forth in Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency
Rider), and Schedule 95 (Adjustment for Municipal Franchise Fees).
Energy Charge, per kWh 10.0770
Minimum Charge, per month $2.00
ADDITIONAL CHARGES
Applicable only to municipalities or agencies of federal, state, or county governments with an
authorized Point of Delivery having the potential of intermittent variations in energy usage.
Intermittent Usage Charge, per unit, per month $2.00
PAYMENT
The monthly bill rendered for service supplied hereunder is payable upon receipt, and becomes
past due 15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 41-3
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 41-3
SCHEDULE 41
STREET LIGHTING SERVICE
(Continued)
SERVICE OPTIONS (Continued)
"A" - Idaho Power-Owned, Idaho Power-Maintained System (Continued)
Monthly Charges
The monthly charges are as follows, and may also include charges as set forth in
Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), and
Schedule 95 (Adjustment for Municipal Franchise Fees).
Charges, per fixture (41A)
LED Fixture
Watt (Maximum) Lumen (Minimum) Base Rate
40 3,600 $12.18
85 7,200 $14.21
140 10,800 $16.29
200 18,000 $20.24
Non-Metered Service—Variable Energy
Energy Charge, per kWh 10.0770
Pole Charges
For Company-owned poles installed after October 5,1964 required to be
used for street lighting only:
Charge
Wood pole, per pole $1.81
Steel pole, per pole $7.18
Facilities Charges
Customers assessed a monthly facilities charge prior to June 1, 2004 will
continue to be assessed a monthly facilities charge in accordance with the charges
specified in Schedule 66.
Payment
The monthly bill rendered for service supplied hereunder is payable upon receipt
and becomes past due 15 days from the date on which rendered.
"B"— Customer-Owned, Idaho Power-Maintained System — Discontinued
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective—January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 41-4
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 41-4
SCHEDULE 41
STREET LIGHTING SERVICE
(Continued)
SERVICE OPTIONS (Continued)
"C" - Customer-Owned, Customer-Maintained System
The Customer's lighting system, including posts or standards, fixtures, initial installation of
fixtures and underground cables with suitable terminals for connection to the Company's
distribution system, is installed, owned, and maintained by the Customer. The Customer is
responsible for notifying the Company of any changes or additions to the lighting equipment or
loads being served under Option C — Non-Metered Service. Failure to notify the Company of
such changes or additions will result in the termination of non-metered service under Option C
and the requirement that service be provided under Option C - Metered Service.
All new Customer-owned lighting systems installed outside of Subdivisions on or after
January 1, 2012 are required to be metered in order to record actual energy usage.
Customer-owned systems installed prior to June 1, 2004 that are constructed, operated,
or modified in such a way as to allow for the potential or actual variation in energy usage may
have the estimated annual variations in energy usage charged the Non-Metered Service- Energy
Charge until the street lighting system is converted to Metered Service, or until the potential for
variations in energy usage has been eliminated, whichever is sooner.
Monthly Charges
The monthly charges are as follows, and may also include charges as set forth in
Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), and
Schedule 95 (Adjustment for Municipal Franchise Fees). For non-metered service, the
average monthly kWh of energy usage shall be estimated by the Company based on the
total wattage of the Customer's lighting system and 4,059 hours of operation.
Non-Metered Service (41 C)
Energy Charge, per kWh 6.7270
Metered Service (41 CM)
Service Charge, per meter $5.59
Energy Charge, per kWh 6.7270
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 2025 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 42-1
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 42-1
SCHEDULE 42
TRAFFIC CONTROL SIGNAL
LIGHTING SERVICE
APPLICABILITY
Service under this schedule is applicable to Electric Service required for the operation of traffic
control signal lights within the State of Idaho. Traffic control signal lamps are mounted on posts or
standards by means of brackets, mast arms, or cable.
CHARACTER OF SERVICE
The traffic control signal fixtures, including posts or standards, brackets, mast arm, cable,
lamps, control mechanisms, fixtures, service cable, and conduit to the point of, and with suitable
terminals for, connection to the Company's underground or overhead distribution system, are installed,
owned, maintained and operated by the Customer. Service is limited to the supply of energy only for
the operation of traffic control signal lights.
The installation of a meter to record actual energy consumption is required for all new traffic
control signal lighting systems installed on or after June 1, 2004. For traffic control signal lighting
systems installed prior to June 1, 2004 a meter may be installed to record actual usage upon the
mutual consent of the Customer and the Company.
MONTHLY CHARGE
The monthly kWh of energy usage shall be either the amount estimated by the Company based
on the number and size of lamps burning simultaneously in each signal and the average number of
hours per day the signal is operated, or the actual meter reading as applicable. The Monthly Charge
shall be computed at the following rate, and may also include charges as set forth in Schedule 55
(Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), and Schedule 95 (Adjustment for
Municipal Franchise Fees).
Energy Charge, per kWh 8.0430
PAYMENT
The monthly bill rendered for service supplied hereunder is payable upon receipt, and becomes
past due 15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 2025 1221 West Idaho Street, Boise, Idaho

BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION
CASE NO. IPC-E-24-07
IDAHO POWER COMPANY
ATTACHMENT NO. 2
TARIFF IN LEGISLATIVE FORMAT

Idaho Power Company 9Fig+Ral-First Revised Sheet No. 1-2
Cancels
I.P.U.C. No. 30, Tariff No. 101EnghteeRth Revised0riginal Sheet No. 1-2
SCHEDULE 1
RESIDENTIAL SERVICE
STANDARD PLAN
(Continued)
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 54 (Fixed Cost Adjustment), Schedule 55 (Power Cost Adjustment), Schedule 91
(Energy Efficiency Rider), Schedule 95 (Adjustment for Municipal Franchise Fees), Schedule 96 (Blaine
County Surcharge to Fund the Undergrounding of Certain Facilities), and Schedule 98 (Residential and
Small Farm Energy Credit).
Summer Non-summer
Service Charge, per month $10.0015.00 $10.0015.00
Energy Charge, per kWh
First 800 kWh 10� 108210.3671¢ -8.89589.12360
801-2000 kWh 12 15 012.46590 9.807310.05850
All Additional kWh Over 2000 14.438514.80820 -i 0.861511.13970
PAYMENT
The monthly bill rendered for service supplied hereunder is payable upon receipt, and becomes
past due 15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. 36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective —January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company GFig+aal-First Revised Sheet No. 3-1
Cancels
I.P.U.C. No. 30, Tariff No. 101 Forst RevisecOriginal Sheet No. 3-1
SCHEDULE 3
MASTER-METERED MOBILE HOME PARK
RESIDENTIAL SERVICE
AVAILABILITY
Service under this schedule is available to master-metered mobile home parks included on the
Company's list of "grandfathered" mobile home parks on file with the Idaho Public Utilities Commission
receiving electric service under Schedule 1 as of March 20, 2009. Customers included on the Company's
list of "grandfathered" mobile home parks as of March 20, 2009 will automatically be transferred to this
Schedule on their next regularly scheduled cycle read date that occurs on or after March 21, 2009.
APPLICABILITY
Service under this schedule is applicable to Electric Service provided to a master-metered
residential mobile home park for residential service for general domestic uses, including single phase
motors of 7'/2 horsepower rating or less. This schedule is not applicable to standby service or shared
service.
TYPE OF SERVICE
The type of service provided under this schedule is single phase, alternating current at
approximately 120 or 240 volts and 60 cycles, supplied through one meter at one Point of Delivery.
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges and may also include charges as set
forth in Schedule 54 (Fixed Cost Adjustment), Schedule 55 (Power Cost Adjustment), Schedule 91
(Energy Efficiency Rider), Schedule 95 (Adjustment for Municipal Franchise Fees), Schedule 96 (Blaine
County Surcharge to Fund the Undergrounding of Certain Facilities), and Schedule 98 (Residential and
Small Farm Energy Credit):
Service Charge, per month $10.0015.00
Energy Charge, per kWh
all kWh 40-384411.11840
Minimum Charge
The monthly Minimum Charge shall be the sum of the Service Charge, the Energy Charge, and
the Power Cost Adjustment.
PAYMENT
The monthly bill rendered for service supplied hereunder is payable upon receipt, and becomes
past due 15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No.36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective —January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company 9Fig+Ral-First Revised Sheet No. 5-2
Cancels
I.P.U.C. No. 30, Tariff No. 101 Third RevusecOriginal Sheet No. 5-2
SCHEDULE 5
RESIDENTIAL SERVICE
TIME-OF-USE PLAN
(OPTIONAL)
(Continued)
TIME PERIODS
The time periods are defined as follows. All times are stated in Mountain Time.
Summer Season
On-Peak: 7:00 p.m. to 11:00 pm. Monday through Saturday, except holidays
Mid-Peak 3:00 p.m. to 7:00 p.m. Monday through Saturday, except holidays
Off-Peak: 11:00 p.m. to 3:00 p.m. Monday through Saturday and all hours on Sunday and
holidays
Non-summer Season
On-Peak: 6:00 a.m. to 9:00 a.m. and 5:00 p.m. to 8:00 p.m. Monday through Saturday,
except holidays
Off-Peak: 9:00 a.m. to 5:00 p.m. and 8:00 p.m. to 6:00 a.m. Monday through Saturday and
all hours on Sunday and holidays
Holidays are New Year's Day (January 1), Memorial Day (last Monday in May), Independence
Day (July 4), Labor Day (first Monday in September), Thanksgiving Day (fourth Thursday in November),
and Christmas Day (December 25). When New Year's Day, Independence Day, or Christmas Day falls
on Sunday, the Monday immediately following that Sunday will be considered a holiday.
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 54 (Fixed Cost Adjustment), Schedule 55 (Power Cost Adjustment), Schedule 91
(Energy Efficiency Rider), Schedule 95 (Adjustment for Municipal Franchise Fees), Schedule 96 (Blaine
County Surcharge to Fund the Undergrounding of Certain Facilities), and Schedule 98 (Residential and
Small Farm Energy Credit).
Summer Non-summer
Service Charge, per month $10.0015.00 $10.0015.00
Energy Charge, per kWh
On-Peak 24.647225.7339 12.778713.34210
Mid-Peak 12.323812.86720 n/a
Off-Peak _6.16 186.43350 8.51918.89470
PAYMENT
The monthly bill rendered for service supplied hereunder is payable upon receipt, and becomes
past due 15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. 36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective —January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 6-9
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 6-9
SCHEDULE 6
RESIDENTIAL SERVICE
ON-SITE GENERATION
(Continued)
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set forth
in Schedule 54 (Fixed Cost Adjustment), Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy
Efficiency Rider), Schedule 95 (Adjustment for Municipal Franchise Fees), Schedule 96 (Blaine County
Surcharge to Fund the Undergrounding of Certain Facilities), and Schedule 98 (Residential and Small Farm
Energy Credit).
The following rate structure and charges are subject to change upon Commission approval:
STANDARD RATES (DEFAULT)
Summer Non-summer
Service Charge, per month $10.0015.00 $10.0015.00
Energy Charge, per kWh
First 800 kWh 10.108210.3671¢ 8.89589.12360
801-2000 kWh 12.154612.46590 $807310.0585¢
All Additional kWh Over 2000 14438514.80820 10.861511.13970
TIME-OF-USE RATES (OPTIONAL)
Summer Non-summer
Service Charge, per month $10.0015.00 $10.0015.00
Energy Charge, per kWh
On-Peak 24.647225.73390 12.778713.34210
Mid-Peak 12.323812.86720 n/a
Off-Peak _ 6.16186.43350 52�8.89470
EXPORT CREDIT RATE
The following rate structure and credits are subject to change upon Commission approval:
Summer Non-summer
Export Credit Rate, per kWh
On-Peak 16.9966¢ 4.8365¢
Off-Peak 5.65330
4.83650
PAYMENT
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. 36042 R 36 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective —January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 6-9
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 6-9
The monthly bill rendered for service supplied hereunder is payable upon receipt, and becomes
past due 15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. 36042 R 36 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company 9Fig+Ral-First Revised Sheet No. 7-2
Cancels
I.P.U.C. No. 30, Tariff No. 101Seyenteenth Reyiso.dOriginal Sheet No. 7-2
SCHEDULE 7
SMALL GENERAL SERVICE
(Continued)
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 54 (Fixed Cost Adjustment), Schedule 55 (Power Cost Adjustment), Schedule 91
(Energy Efficiency Rider), Schedule 95 (Adjustment for Municipal Franchise Fees), Schedule 96 (Blaine
County Surcharge to Fund the Undergrounding of Certain Facilities), and Schedule 98 (Residential and
Small Farm Energy Credit).
Summer Non-summer
Service Charge, per month $25.00 $25.00
Energy Charge, per kWh
First 300 kWh 6.74047.70420 6.74047.70420
All Additional kWh 7.70278.80420 6.74217.7061¢
PAYMENT
The monthly bill rendered for service supplied hereunder is payable upon receipt, and becomes
past due 15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. 36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective —January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company First Revised Sheet No. 8-8
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 8-8
SCHEDULE8
SMALL GENERAL SERVICE
ON-SITE GENERATION
(Continued)
MONTHLY CHARGE (Continued)
The following charges are subject to change upon Commission approval:
Summer Non-summer
Service Charge, per month $25.00 $25.00
Energy Charge, per kWh
First 300 kWh 6.74047.70420 6.74047.70420
All Additional kWh 7.70278.80420 6.74217.7061¢
EXPORT CREDIT RATE
The following rate structure and credits are subject to change upon Commission approval:
Summer Non-summer
Export Credit Rate, per kWh
On-Peak 16.99660 4.83650
Off-Peak —5.65330 4.83650
PAYMENT
The monthly bill rendered for service supplied hereunder is payable upon receipt, and becomes
past due 15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. 36042 R 36 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company 9Fig+Ral-First Revised Sheet No. 9-4
Cancels
I.P.U.C. No. 30, Tariff No. 101 Fe meth+" R&A-sedOriginal Sheet No. 9-4
SCHEDULE 9
LARGE GENERAL SERVICE
(Continued)
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), Schedule 95
(Adjustment for Municipal Franchise Fees), Schedule 96 (Blaine County Surcharge to Fund the
Undergrounding of Certain Facilities), and Schedule 98 (Residential and Small Farm Energy Credit).
SECONDARY SERVICE - STANDARD RATES Summer Non-summer
(DEFAULT)
Service Charge, per month $25.00 $25.00
Basic Charge, per kW of Basic Load Capacity
Basic Load Capacity $4-491.59
$4481.59
Demand Charge, per kW of Billing Demand
Billing Demand $7- 68.20
$6-.046.47
Energy Charge, per kWh
All kWh 5.15485.52380
4.97185.3281¢
SECONDARY SERVICE -TIME-OF-USE Summer Non-summer
(OPTIONAL)
Service Charge, per month $25.00 $25.00
Basic Charge, per kW of Basic Load Capacity
Basic Load Capacity $4-.481.59
$4 91.59
Demand Charge, per kW of Billing Demand
Billing Demand $7- 68.20
$6 046.47
Energy Charge, per kWh
On-Peak 5.51495.9101¢
5.25725.63390
Mid-Peak 5.51495.9101¢
5.02185.3817¢
Off-Peak 4.97005.32620
4.833455.18090
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No.36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective -January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company 9Fig+Ral-First Revised Sheet No. 9-5
Cancels
I.P.U.C. No. 30, Tariff No. 101Seyenteenth Reyiso.dOriginal Sheet No. 9-5
SCHEDULE 9
LARGE GENERAL SERVICE
(Continued)
PRIMARY SERVICE Summer Non-summer
Service Charge, per month $340.00 $340.00
Basic Charge, per kW of
Basic Load Capacity $4-.-T31.85 $4.31.85
Demand Charge, per kW of
Billing Demand $7.89-8.44 $7 488.00
On-Peak Demand Charge, per kW of
On-Peak Billing Demand $1.49-1.59 n/a
Energy Charge, per kWh
On-Peak 5.09755.44940
4.62954.94890
Mid-Peak 5.09755.44940
4.40204.70580
Off-Peak 4.57044.88580
4.21964.51080
TRANSMISSION SERVICE Summer Non-summer
Service Charge, per month $340.00 $340.00
Basic Charge, per kW of
Basic Load Capacity $4-831.10 $4-031.10
Demand Charge, per kW of
Billing Demand $6 9-57.44 $6-0-96.52
On-Peak Demand Charge, per kW of
On-Peak Billing Demand $1.49-1.59 n/a
Energy Charge, per kWh
On-Peak 5-02395.37580
453134.84870
Mid-Peak 5.02395.37580
4.30364.60500
Off-Peak 4.49084.80540
4-12104.40970
PAYMENT
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. 36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective -January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company GFigiRal First Revised Sheet No. 15-2
Cancels
I.P.U.C. No. 30, Tariff No. 101Seyenteenth RevisodOriginal Sheet No. 15-2
SCHEDULE 15
DUSK TO DAWN CUSTOMER
LIGHTING
(Continued)
NEW FACILITIES
Where facilities of the Company are not presently available for a lighting fixture installation
which will provide satisfactory lighting service for the Customer's Premises, the Company may install
overhead or underground secondary service facilities, including secondary conductor, poles, anchors,
etc., a distance not to exceed 300 feet to supply the desired service, all in accordance with the charges
specified below.
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), and Schedule 95
(Adjustment for Municipal Franchise Fees).
1. Monthly Per Unit Charge on existing facilities:
AREA LIGHTING
LED Fixture
Watt (Maximum) Lumen (Minimum) Base Rate
40 3,600 $ 9-459.80
85 7,200 W.6011.90
200 18,000 $16.6117.20
FLOOD LIGHTING
LED Fixture
Watt (Maximum) Lumen (Minimum) Base Rate
85 8,100 $18.7619.43
150 18,000 $20.6721.42
300 32,000 $24.3125.18
2. For New Facilities Installed Before June 1, 2004: The Monthly Charge for New Facilities
installed prior to June 1, 2004, will continue to be assessed a monthly facilities charge in accordance
with the changes specified in Schedule 66.
3. For New Facilities Installed On or After June 1, 2004: The non-refundable charge for
New Facilities to be installed, such as underground service, overhead secondary conductor, poles,
anchors, etc., shall be equal to the work order cost.
PAYMENT
The monthly bill for service supplied hereunder is payable upon receipt, and becomes past due
15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. 36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective—January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company 9rigiRal First Revised Sheet No. 19-3
Cancels
I.P.U.C. No. 30, Tariff No. 101T"irteeRth RevisedOriginal Sheet No. 19-3
SCHEDULE 19
LARGE POWER SERVICE
(Continued)
FACILITIES BEYOND THE POINT OF DELIVERY
At the Customer's request and at the option of the Company, transformers and other facilities
installed beyond the Point of Delivery to provide Primary or Transmission Service may be owned,
operated, and maintained by the Company in consideration of the Customer paying a Facilities Charge
to the Company. This service is provided under the provisions set forth in Rule M, Facilities Charge
Service.
POWER FACTOR ADJUSTMENT
Where the Customer's Power Factor is less than 90 percent, as determined by measurement
under actual load conditions,the Company may adjust the kW measured to determine the Billing Demand
by multiplying the measured kW by 90 percent and dividing by the actual Power Factor.
TEMPORARY SUSPENSION
When a Customer has properly invoked Rule G, Temporary Suspension of Demand, the Basic
Load Capacity, the Billing Demand, and the On-Peak Billing Demand shall be prorated based on the
period of such suspension in accordance with Rule G. In the event the Customer's metered demand is
less than 1,000 kW during the period of such suspension, the Basic Load Capacity and Billing Demand
will be set equal to 1,000 kW for purposes of determining the Customer's Monthly Charge.
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), Schedule 95
(Adjustment for Municipal Franchise Fees), and Schedule 96 (Blaine County Surcharge to Fund the
Undergrounding of Certain Facilities).
SECONDARY SERVICE Summer Non-summer
Service Charge, per month $85.00 $85.00
Basic Charge, per kW of
Basic Load Capacity $4 902.04 $4 902.04
Demand Charge, per kW of
Billing Demand $9 90-10.60 $7-.W8.54
On-Peak Demand Charge, per kW of
On-Peak Billing Demand $1.71 1.83 n/a
Energy Charge, per kWh
On-Peak 5.64506.04670
5.11195.4747�
Mid-Peak 5.64506.04670
4.88295.23040
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No.36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective —January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company 9rigiRal First Revised Sheet No. 19-3
Cancels
I.P.U.C. No. 30, Tariff No. 101T"irteeRth RevisedOriginal Sheet No. 19-3
Off-Peak 5.11975.4841¢
4.70005.03450
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No.36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective —January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company 9rigiRal First Revised Sheet No. 19-4
Cancels
I.P.U.C. No. 30, Tariff No. 101S;xteeRth Reyiso.dOriginal Sheet No. 19-4
SCHEDULE 19
LARGE POWER SERVICE
(Continued)
MONTHLY CHARGE (Continued)
PRIMARY SERVICE Summer Non-summer
Service Charge, per month $415.00 $415.00
Basic Charge, per kW of $2-.092.24 $2-.092.24
Basic Load Capacity
Demand Charge, per kW of $9-.4710.14 $8-148.72
Billing Demand
On-Peak Demand Charge, per kW of
On-Peak Billing Demand $4-501.61 n/a
Energy Charge, per kWh
On-Peak 4.92535.27670
4.452604.7702�
Mid-Peak 4.92535.27670
T 2444.52580
Off-Peak 4.39954.71340
4.04144.32970
TRANSMISSION SERVICE Summer Non-summer
Service Charge, per month $415.00 $415.00
Basic Charge, per kW of
Basic Load Capacity $4-761.89 $4-.-761.89
Demand Charge, per kW of
Billing Demand $9-.6410.30 $8-.2-78.86
On-Peak Demand Charge, per kW of
On-Peak Billing Demand $1.50-1.61 n/a
Energy Charge, per kWh
On-Peak 4.90865.25980
4.42394.74040
Mid-Peak 4.90865.25980
4.19564.4958¢
Off-Peak 4.37994.69320
4.01254.29960
PAYMENT
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. 36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective —January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company 9rigiRal First Revised Sheet No. 19-4
Cancels
I.P.U.C. No. 30, Tariff No. 101S;xteeRth [ eyiso.dOriginal Sheet No. 19-4
The monthly bill for service supplied hereunder is payable upon receipt, and becomes past due
15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. 36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective —January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company9r+gina-First Revised Sheet No. Sheet No. 20-6
Cancels
I.P.U.C. No. 30, Tariff No. 101 Corot Revused0riginal Sheet No. 20-6
SCHEDULE 20
SPECULATIVE HIGH-DENSITY LOAD
(Continued)
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 91 (Energy Efficiency Rider), and Schedule 95 (Adjustment for Municipal Franchise
Fees).
Large General Service Rates
PRIMARY SERVICE Summer Non-summer
Service Charge, per month $340.00 $340.00
Basic Charge, per kW of $4-.7-31.85 $4-.7-31.85
Basic Load Capacity
Demand Charge, per kW of $8—.N8.98 $7.988.54
Billing Demand
Energy Charge, per kWh
On-Peak 8.87709.22890
6 4641-6.78050
Mid-Peak 11� r 7011.94890
8.20288.50660
Off-Peak 6.57656.89190
6.99637.19750
TRANSMISSION SERVICE Summer Non-summer
Service Charge, per month $340.00 $340.00
Basic Charge, per kW of
Basic Load Capacity $4-.031.10 $4-.031.10
Demand Charge, per kW of
Billing Demand $7 457.98 $6-.597.06
Energy Charge, per kWh
On-Peak 8.80349.15530
6.36296.68030
Mid-Peak 41.523411.87530
8.10448.4058¢
Off-Peak 6.49696.81150
6.80777.0964¢
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. 36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective —January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company 9rigiRaLFirst Revised Sheet No. 20-7
Cancels
I.P.U.C. No. 30, Tariff No. 101 Forst RevisecOriginal Sheet No. 20-7
SCHEDULE 20
SPECULATIVE HIGH-DENSITY LOAD
(Continued)
MONTHLY CHARGE (Continued)
Large Power Service Rates
PRIMARY SERVICE Summer Non-summer
Service Charge, per month $415.00 $415.00
Basic Charge, per kW of $2-.G92.24 $2-492.24
Basic Load Capacity
Demand Charge, per kW of $9�710.67 $8-649.25
Billing Demand
Energy Charge, per kWh
On-Peak 8.69969.05100
6.27996.5966¢
Mid-Peak 11�11.77100
8.02008.32140
Off-Peak 6.40046.71430
6.72297.01120
TRANSMISSION SERVICE Summer Non-summer
Service Charge, per month $415.00 $415.00
Basic Charge, per kW of
Basic Load Capacity $4.7-61.89 $4.7-61.89
Demand Charge, per kW of
Billing Demand $48.11 10.83 $8-.7-79.39
Energy Charge, per kWh
On-Peak 8.68299.0341¢
6.25086.56680
Mid-Peak 11.402911.7541¢
7.994 28.29140
Off-Peak 6.38086.6941¢
6.69406.9811¢
PAYMENT
The monthly bill for service supplied hereunder is payable upon receipt, and becomes past due
15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. 36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective —January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company 9rigiRaLFirst Revised Sheet No. 24-3
Cancels
I.P.U.C. No. 30, Tariff No. 101Seyenteenth RevisodOriginal Sheet No. 24-3
SCHEDULE 24
AGRICULTURAL IRRIGATION
SERVICE
(Continued)
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), Schedule 95
(Adjustment for Municipal Franchise Fees), Schedule 96 (Blain County Surcharge to Fund the
Undergrounding of Certain Facilities), and Schedule 98 (Residential and Small Farm Energy Credit).
SECONDARY SERVICE In-Season Out-of-Season
Service Charge, per month $30.00 $6.00
Demand Charge, per kW of
Billing Demand $44.0615.42 n/a
Energy Charge
All kWh 5.72656.28190
6.72897.38070
TRANSMISSION SERVICE In-Season Out-of-Season
Service Charge, per month $415.00 $6.00
Demand Charge, per kW of
Billing Demand $43.2714.56 n/a
Energy Charge
All kWh 5:-46496.0163¢
6:42157.0437¢
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. 36042
Timothy E. Tatum, Vice President, Regulatory Affairs
Effective—January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company GFigiRaLFirst Revised Sheet No. 26-1
Cancels
I.P.U.C. No. 30, Tariff No. 101S;xteeRth Reyiso.dOriginal Sheet No. 26-1
SCHEDULE 26
IDAHO POWER COMPANY
ELECTRIC SERVICE RATE
FOR
MICRON TECHNOLOGY, INC.
BOISE, IDAHO
SPECIAL CONTRACT DATED MARCH 9, 2022, AMENDED MAY 31, 2023
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), and Schedule 95
(Adjustment for Municipal Franchise Fees). Terms used below have the meanings given to them in the
Special Contract referenced above.
Monthly Contract Demand Charge
$34�3.47 per kW of Contract Demand.
Monthly Billing Demand Charge
$a-6-:69 &31 per kW of Billing Demand but not less than Minimum Monthly Billing Demand.
Minimum Monthly Billing Demand
The Minimum Monthly Billing Demand will be 25,000 kilowatts.
Daily Excess Demand Charge
$a-2441.375 per each kW over the Contract Demand.
Monthly Energy Charge
3-0394.3.03940 per kWh.
Embedded Energy Fixed Cost Charge
0.00000 per kWh of Renewable Resource On-Site Usage
Monthly Adjusted Renewable Capacity Credit(s)
See Table Nos.1, 2, 3, and Revised Exhibit 1 of Micron's Special Contract, dated March 9, 2022,
as amended.
Renewable Resource Cost
As defined in Revised Exhibit 1 of Micron's Special Contract, dated March 9, 2022, as amended.
Excess Generation Credit
As defined in Revised Exhibit 1 of Micron's Special Contract, dated March 9, 2022, as amended.
Administrative Charge
As defined in Revised Exhibit 1 of Micron's Special Contract, dated March 9, 2022, as amended.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. 36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective —January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company 9rigiRaLFirst Revised Sheet No. 29-1
Cancels
I.P.U.C. No. 30, Tariff No. 101 FifteeRth ReyisedOriginal Sheet No. 29-1
SCHEDULE 29
IDAHO POWER COMPANY
ELECTRIC SERVICE RATE
FOR
J. R. SIMPLOT COMPANY
POCATELLO, IDAHO
SPECIAL CONTRACT DATED JUNE 29, 2004
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), and Schedule 95
(Adjustment for Municipal Franchise Fees).
Contract Demand Charge
$344 .25 per kW of Contract Demand
Demand Charge,
$4-4-.2-314.88 per kW of Billing Demand but no less than the Contract Demand less 5,000 kW
Daily Excess Demand Charge
$4—. ?441.301 per each kW over the Contract Demand
Energy Charge
`'�3.12600 per kWh
Monthly Facilities Charge
Facilities installed beyond the Point of Delivery will be subject to the provisions of Rule M,
Facilities Charge Service.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No.36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective —January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company 9r+giRalFirst Revised Sheet No. 30-1
Cancels
I.P.U.C. No. 30, Tariff No. 101co„enteeRth Q�Original Sheet No. 30-1
SCHEDULE 30
IDAHO POWER COMPANY
ELECTRIC SERVICE RATE
FOR
UNITED STATES DEPARTMENT OF ENERGY
IDAHO OPERATIONS OFFICE
SPECIAL CONTRACT DATED SEPTEMBER 15, 2021
CONTRACT NO. 47PA0420D0011
AVAILABILITY
This schedule is available for firm retail service of electric power and energy delivered for the
operations of the Department of Energy's facilities located at the Idaho National Engineering Laboratory
site, as provided in the Contract for Electric Service between the parties.
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), and Schedule 95
(Adjustment for Municipal Franchise Fees).
1. Demand Charge, per kW of
Billing Demand $9-.7-510.12
2. Energy Charge, per kWh 4.09514.25340
SPECIAL CONDITIONS
1. Billing Demand. The Billing Demand shall be the average kW supplied during the 30-
minute period of maximum use during the month.
2. Power Factor Adjustment. When the Power Factor is less than 95 percent during the 30-
minute period of maximum load for the month, Company may adjust the measured Demand to determine
the Billing Demand by multiplying the measured kW of Demand by 0.95 and dividing by the actual Power
Factor.
MONTHLY ANTELOPE ASSET CHARGE ("AAC")
The AAC will be paid for the Company's investment in, and operation and maintenance expenses
associated with, specified transmission facilities required to provide service under the contract.
The Monthly AAC consists of two components:
1. PacifiCorp Pass-Through Charge (PPTC):
PPTC = (O&M x GAV) + (CEC)
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. 36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective — January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company Original First Revised Sheet No. 32-1
Cancels
I.P.U.C. No. 30, Tariff No. 101 Sixth Reyose`[Original Sheet No. 32-1
SCHEDULE 32
IDAHO POWER COMPANY
ELECTRIC SERVICE RATE
FOR
J. R. SIMPLOT COMPANY
CALDWELL, IDAHO
SPECIAL CONTRACT DATED APRIL 8, 2015
SUMMER AND NON-SUMMER SEASONS
The summer season begins on June 1 of each year and ends on September 30 of each year.
The non-summer season begins on October 1 of each year and ends on May 31 of each year.
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), and Schedule 95
(Adjustment for Municipal Franchise Fees).
Summer Non-Summer
Contract Demand Charge
per kW of Contract Demand _$3-.443.33 $3-.443.33
Demand Charge
per kW of Billing Demand but no less
than the Contract Demand less 10,000 kW $1:4919.80 $15.2316.37
Daily Excess Demand Charge
per each kW over the Contract Demand $4 2441.332 $4-2441.332
Energy Charge
per kWh 2.86753.07110
3 53.31750
Monthly Facilities Charge
Facilities installed beyond the Point of Delivery will be subject to the provisions of Rule M,
Facilities Charge Service.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. 36042
Timothy E. Tatum, Vice President, Regulatory Affairs
Effective—January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company 9rigiRaLFirst Revised Sheet No. 33-2
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 33-2
SCHEDULE 33
IDAHO POWER COMPANY
ELECTRIC SERVICE RATE
FOR
BRISBIE, LLC.
(Continued)
TIME PERIODS (Continued)
The holidays observed by the Company are New Year's Day (January 1), Memorial Day (last
Monday in May), Independence Day (July 4), Labor Day, Thanksgiving Day (fourth Thursday in
November), and Christmas Day (December 25). When New Year's Day, Independence Day, or
Christmas Day falls on a Sunday, the Monday immediately following that Sunday will be considered a
holiday.
SUMMER AND NON-SUMMER SEASONS
The summer season begins on June 1 of each year and ends on September 30 of each year.
The non-summer season begins on October 1 of each year and ends on May 31 of each year.
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), and Schedule 95
(Adjustment for Municipal Franchise Fees).
Summer Non-summer
Service Charge, per month $415.00 $415.00
Basic Charge, per kW of
Basic Load Capacity $4-.761.89 $4 T61.89
Demand Charge, per kW of
Billing Demand $9-.6410.30 $9-.2-78.86
On-Peak Demand Charge, per kW of
On-Peak Billing Demand $1.50-1.61 n/a
Energy Charge, per kWh
On-Peak 4.90865.25980
4.42394.74040
Mid-Peak 490865.25980
4.19564.49580
Off-Peak 4-3994.69320
4.01254.29960
Embedded Energy Fixed Cost Rate, per kWh
On-Peak 0.69510 1.55690
Mid-Peak 0.69510 1.55690
Off-Peak 0.69510 1.55690
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. 36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective —January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company 9rigiRal First Revised Sheet No. 33-3
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 33-3
SCHEDULE 33
IDAHO POWER COMPANY
ELECTRIC SERVICE RATE
FOR
BRISBIE, LLC.
(Continued)
BLOCK 2
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set forth in
Schedule 91 (Energy Efficiency Rider), and Schedule 95 (Adjustment for Municipal Franchise Fees).
Terms used below have the meanings given to them in the Special Contract referenced above.
Daily Excess Demand Charge
$4 2441.333 per each kW over the Contract Demand.
Excess Generation Credit
As defined in Revised Exhibit 3.1 of Brisbie, LLC's Special Contract, December 22, 2021 as
amended.
Monthly Contract Demand Charge
$3443.33 per kW of Contract Demand.
Monthly Billing Demand Charge
$24-0422.51 per kW of Billing Demand but not less than Minimum Monthly Billing Demand.
Minimum Monthly Billing Demand
The Minimum Monthly Billing Demand will be 20,000 kilowatts.
Monthly Adjusted Renewable Capacity Credit(s)
See Table Nos. 1, 2, 3, and Revised Exhibit 3.1 of Brisbie, LLC's Special Contract, dated
December 22, 2021, as amended.
Renewable Resource Cost
As included in the Monthly Contract Payment listed in Revised Exhibit 3.1 of Brisbie, LLC's Special
Contract, December 22, 2021, as amended.
Supplemental Energy Cost
As defined in Revised Exhibit 3.1 of Brisbie, LLC's Special Contract, December 22, 2021, as
amended.
Administrative Charge
As defined in Revised Exhibit 3.1 of Brisbie, LLC's Special Contract, December 22, 2021, as
amended.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No.36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective -January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company 9rigiRaLFirst Revised Sheet No. 34-3
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 34-3
SCHEDULE 34
IDAHO POWER COMPANY
ELECTRIC SERVICE RATE
FOR
LAMB WESTON, INC.
(Continued)
SUMMER AND NON-SUMMER SEASONS
The summer season begins on June 1 of each year and ends on September 30 of each year. The
non-summer season begins on October 1 of each year and ends on May 31 of each year.
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set
forth in Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), and Schedule 95
(Adjustment for Municipal Franchise Fees).
Summer Non-summer
Service Charge, per month $415.00 $415.00
Basic Charge, per kW of
Basic Load Capacity $2.09-2.24 $2-.092.24
Demand Charge, per kW of
Billing Demand $9-.710.14 $8448.72
On-Peak Demand Charge, per kW of
On-Peak Billing Demand $1.50-1.61 n/a
Energy Charge, per kWh
On-Peak 4.92535.27670
4.45264.77020
Mid-Peak 4.92535.27670
.`'��444.52580
Off-Peak 4.39954.71340
4.04144.32970
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. 36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective - January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company 9rigiRaLFirst Revised Sheet No. 34-4
Cancels
I.P.U.C. No. 30, Tariff No. 101 Original Sheet No. 34-4
SCHEDULE 34
IDAHO POWER COMPANY
ELECTRIC SERVICE RATE
FOR
LAMB WESTON, INC.
(Continued)
BLOCK 2
MONTHLY CHARGE
The Monthly Charge is the sum of the following charges, and may also include charges as set forth in
Schedule 91 (Energy Efficiency Rider), and Schedule 95 (Adjustment for Municipal Franchise Fees).
Daily Excess Demand Charge
$4 2441.332 per each kW over the Contract Demand.
Monthly Contract Demand Charge
$3443.33 per kW of Contract Demand.
Monthly Billing Demand Charge
$22.8524.45 per kW of Billing Demand but not less than Minimum Monthly Billing Demand.
Energy Charge
5.8694.5.86940 per kWh of Block 2 Energy.
Minimum Monthly Billing Demand
The Minimum Monthly Billing Demand will be 20,000 kilowatts.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. 36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective - January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company 9rigiRal First Revised Sheet No. 40-2
Cancels
I.P.U.C. No. 30, Tariff No. 101 FifteeRth ReyisedOriginal Sheet No. 40-2
SCHEDULE 40
NON-METERED GENERAL SERVICE
(Continued)
MONTHLY CHARGE
The average monthly kWh of energy usage shall be estimated by the Company, based on the
Customer's electric equipment and one-twelfth of the annual hours of operation thereof. Since the
service provided is non-metered, failure of the Customer's equipment will not be reason for a reduction
in the Monthly Charge. The Monthly Charge shall be computed at the following rate, and may also
include charges as set forth in Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency
Rider), and Schedule 95 (Adjustment for Municipal Franchise Fees).
Energy Charge, per kWh 9.37710.0770
Minimum Charge, per month $2.00
ADDITIONAL CHARGES
Applicable only to municipalities or agencies of federal, state, or county governments with an
authorized Point of Delivery having the potential of intermittent variations in energy usage.
Intermittent Usage Charge, per unit, per month $2.00
PAYMENT
The monthly bill rendered for service supplied hereunder is payable upon receipt, and becomes
past due 15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No.36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective —January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company 9rigiRaLFirst Revised Sheet No. 41-3
Cancels
I.P.U.C. No. 30, Tariff No. 101 FifteeRth ReyisedOriginal Sheet No. 41-3
SCHEDULE 41
STREET LIGHTING SERVICE
(Continued)
SERVICE OPTIONS (Continued)
"A" - Idaho Power-Owned, Idaho Power-Maintained System (Continued)
Monthly Charges
The monthly charges are as follows, and may also include charges as set forth in
Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), and
Schedule 95 (Adjustment for Municipal Franchise Fees).
Charges, per fixture (41A)
LED Fixture
Watt (Maximum) Lumen (Minimum) Base Rate
40 3,600 $41.4812.18
85 7,200 $43.3814.21
140 10,800 $15.3416.29
200 18,000 $19.0620.24
Non-Metered Service—Variable Energy
Energy Charge, per kWh 9 37710.0770
Pole Charges
For Company-owned poles installed after October 5,1964 required to be
used for street lighting only:
Charge
Wood pole, per pole $1.81
Steel pole, per pole $7.18
Facilities Charges
Customers assessed a monthly facilities charge prior to June 1, 2004 will
continue to be assessed a monthly facilities charge in accordance with the charges
specified in Schedule 66.
Payment
The monthly bill rendered for service supplied hereunder is payable upon receipt
and becomes past due 15 days from the date on which rendered.
"B"— Customer-Owned, Idaho Power-Maintained System — Discontinued
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. 36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective—January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company 9rigiRal First Revised Sheet No. 41-4
Cancels
I.P.U.C. No. 30, Tariff No. 101 FifteeRth ReyisedOriginal Sheet No. 41-4
SCHEDULE 41
STREET LIGHTING SERVICE
(Continued)
SERVICE OPTIONS (Continued)
"C" - Customer-Owned, Customer-Maintained System
The Customer's lighting system, including posts or standards, fixtures, initial installation of
fixtures and underground cables with suitable terminals for connection to the Company's
distribution system, is installed, owned, and maintained by the Customer. The Customer is
responsible for notifying the Company of any changes or additions to the lighting equipment or
loads being served under Option C — Non-Metered Service. Failure to notify the Company of
such changes or additions will result in the termination of non-metered service under Option C
and the requirement that service be provided under Option C - Metered Service.
All new Customer-owned lighting systems installed outside of Subdivisions on or after
January 1, 2012 are required to be metered in order to record actual energy usage.
Customer-owned systems installed prior to June 1, 2004 that are constructed, operated,
or modified in such a way as to allow for the potential or actual variation in energy usage may
have the estimated annual variations in energy usage charged the Non-Metered Service- Energy
Charge until the street lighting system is converted to Metered Service, or until the potential for
variations in energy usage has been eliminated, whichever is sooner.
Monthly Charges
The monthly charges are as follows, and may also include charges as set forth in
Schedule 55 (Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), and
Schedule 95 (Adjustment for Municipal Franchise Fees). For non-metered service, the
average monthly kWh of energy usage shall be estimated by the Company based on the
total wattage of the Customer's lighting system and 4,059 hours of operation.
Non-Metered Service (41 C)
Energy Charge, per kWh 6.3396.7270
Metered Service (41 CM)
Service Charge, per meter $5.59
Energy Charge, per kWh 6.3396.7270
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. 36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective —January 1, 20245 1221 West Idaho Street, Boise, Idaho

Idaho Power Company GF al-First Revised Sheet No. 42-1
Cancels
I.P.U.C. No. 30, Tariff No. 101 FifteeRth ReyisedOriginal Sheet No. 42-1
SCHEDULE 42
TRAFFIC CONTROL SIGNAL
LIGHTING SERVICE
APPLICABILITY
Service under this schedule is applicable to Electric Service required for the operation of traffic
control signal lights within the State of Idaho. Traffic control signal lamps are mounted on posts or
standards by means of brackets, mast arms, or cable.
CHARACTER OF SERVICE
The traffic control signal fixtures, including posts or standards, brackets, mast arm, cable,
lamps, control mechanisms, fixtures, service cable, and conduit to the point of, and with suitable
terminals for, connection to the Company's underground or overhead distribution system, are installed,
owned, maintained and operated by the Customer. Service is limited to the supply of energy only for
the operation of traffic control signal lights.
The installation of a meter to record actual energy consumption is required for all new traffic
control signal lighting systems installed on or after June 1, 2004. For traffic control signal lighting
systems installed prior to June 1, 2004 a meter may be installed to record actual usage upon the
mutual consent of the Customer and the Company.
MONTHLY CHARGE
The monthly kWh of energy usage shall be either the amount estimated by the Company based
on the number and size of lamps burning simultaneously in each signal and the average number of
hours per day the signal is operated, or the actual meter reading as applicable. The Monthly Charge
shall be computed at the following rate, and may also include charges as set forth in Schedule 55
(Power Cost Adjustment), Schedule 91 (Energy Efficiency Rider), and Schedule 95 (Adjustment for
Municipal Franchise Fees).
Energy Charge, per kWh 7..3468.0430
PAYMENT
The monthly bill rendered for service supplied hereunder is payable upon receipt, and becomes
past due 15 days from the date on which rendered.
IDAHO Issued by IDAHO POWER COMPANY
Issued per Order No. 36042 Timothy E. Tatum, Vice President, Regulatory Affairs
Effective —January 1, 20245 1221 West Idaho Street, Boise, Idaho

BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION
CASE NO. IPC-E-24-07
IDAHO POWER COMPANY
ATTACHMENT NO. 3
SUMMARY OF REVENUE IMPACT

Idaho Power Company
Calculation of Revenue Impact
State of Idaho
IPC-E-24-07
Filed May 31,2024
Summary of Revenue Impact
Current Base Revenue to Proposed Base Revenue
Total Percent
Rate Average Normalized Current Adjustments Proposed Change
Line Sch. Number of Energy Base Mills to Base Base Mills Base to Base
No Tariff Description No. Customers(') (kWh)(') Revenue Per kWh Revenue Revenue Per kWh Revenue(2)
Uniform Tariff Rates:
1 Residential Service 1 499,325 5,579,241,557 $609,399,228 109.23 $44,026,989 $653,426,217 117.12 7.22%
2 Master Metered Mobile Home Park 3 19 5,177,219 $539,926 104.29 $39,155 $579,081 111.85 7.25%
3 Residential Service Time-of-Day 5 989 18,023,379 $1,902,523 105.56 $137,969 $2,040,492 113.21 7.25%
4 Residential Service On-Site Generation 6 17,725 162,496,048 $17,970,410 110.59 $1,469,170 $19,439,580 119.63 8.18%
5 Small General Service 7 30,408 137,888,027 $18,650,526 135.26 $1,361,623 $20,012,149 145.13 7.30%
6 Small General Service On-Site Generation 8 101 461,158 $61,992 134.43 $4,533 $66,525 144.26 7.31%
7 Large General Service 9 39,016 3,939,445,695 $320,493,527 81.35 $21,935,190 $342,428,718 86.92 6.84%
8 Dusk to Dawn Lighting 15 0 2,615,028 $1,327,007 507.45 $48,479 $1,375,486 525.99 3.65%
9 Large Power Service 19 124 2,055,250,567 $135,863,467 66.11 $9,648,571 $145,512,038 70.80 7.10%
10 Agricultural Irrigation Service 24 19,515 1,829,051,780 $166,865,446 91.23 $15,849,613 $182,715,059 99.90 9.50%
11 Unmetered General Service 40 1,663 14,381,350 $1,350,464 93.90 $100,681 $1,451,145 100.90 7.46%
12 Street Lighting 41 3,324 20,670,727 $3,660,667 177.09 $218,214 $3,878,881 187.65 5.96%
13 Traffic Control Lighting 42 766 2,983,484 $219,167 73.46 $20,817 $239,984 80.44 9.50%
14 Total Uniform Tariffs 612,975 13,767,686,019 $1,278,304,350 92.85 $94,861,004 $1,373,165,354 99.74 7.42%
15 Total Special Contracts 5 1,264,873,695 $80,668,200 63.78 $4,432,215 $85,100,415 67.28 5.49%
16 Idaho Power Supplied Retail Sales 612,980 15,032,559,714 1,358,972,550 90.40 $99,293,220 $1,458,265,770 97.01 7.31%
(1)Test Year Revenue Forecast January 2024-December 2024(GRC)
(2) Impacts do not include Black Mesa and marginal energy sales

Idaho Power Company
Calculation of Revenue Impact
State of Idaho
IPC-E-24-07
Filed May 31,2024
Summary of Revenue Impact-Rates 9,19,and 24 Distribution Level Detail
Current Base Revenue to Proposed Base Revenue
Percent
Rate Average Normalized Current Adjustments Proposed Change
Line Sch. Number of Energy Base Mills to Base Base Mills Base to Base
No Tariff Description No. Customers(') (kWh)(') Revenue Per kWh Revenue Revenue Per kWh Revenue
Uniform Tariff Rates:
1 Large General Secondary 9S 38,725 3,299,187,444 $273,615,310 82.93 $18,774,625 $292,389,935 88.62 6.86%
2 Large General Primary 9P 288 635,765,089 $46,542,335 73.21 $3,137,920 $49,680,255 78.14 6.74%
3 Large General Transmission 9T 3 4,493,162 $335,882 74.75 $22,645 $358,528 79.79 6.74%
4 Total Schedule 9 39,016 3,939,445,695 $320,493,527 81.35 $21,935,190 $342,428,718 86.92 6.84%
5 Large Power Secondary 19S 1 6,730,275 $485,083 72.07 $34,449 $519,532 77.19 7.10%
6 Large Power Primary 19P 120 2,017,395,432 $133,398,933 66.12 $9,473,549 $142,872,482 70.82 7.10%
7 Large Power Transmission 19T 3 31,124,860 $1,979,450 63.60 $140,574 $2,120,024 68.11 7.10%
8 Total Schedule 19 124 2,055,250,567 $135,863,467 66.11 $9,648,571 $145,512,038 70.80 7.10%
9 Irrigation Secondary 24S 19,515 1,829,051,780 $166,865,446 91.23 $15,849,613 $182,715,059 99.90 9.50%
10 Irrigation Transmission 24T 0 0 $0 0.00 $0 $0 0.00 0.00%
11 Total Schedule 24 19,515 1,829,051,780 $166,865,446 91.23 $15,849,613 $182,715,059 99.90 9.50%
(1)Test Year Revenue Forecast January 2024-December 2024(GRC)

Idaho Power Company
Calculation of Revenue Impact
State of Idaho
IPC-E-24-07
Filed May 31,2024
Summary of Revenue Impact
Current Billed Revenue to Proposed Billed Revenue
Total Percent
Rate Average Normalized Current Adjustments Proposed Change
Line Sch. Number of Energy Billed Mills to Billed Billed Mills Billed to Billed
No Tariff Description No. Customers(') (kWh)(') Revenue Per kWh Revenue Revenue Per kWh Revenue(2)
Uniform Tariff Rates:
1 Residential Service 1 499,325 5,579,241,557 $685,438,711 122.86 $44,026,989 $729,465,700 130.75 6.42%
2 Master Metered Mobile Home Park 3 19 5,177,219 $610,486 117.92 $39,155 $649,641 125.48 6.41%
3 Residential Service Time-of-Day 5 989 18,023,379 $2,148,164 119.19 $137,969 $2,286,133 126.84 6.42%
4 Residential Service On-Site Generation 6 17,725 162,496,048 $20,185,068 124.22 $1,469,170 $21,654,238 133.26 7.28%
5 Small General Service 7 30,408 137,888,027 $20,730,567 150.34 $1,361,623 $22,092,189 160.22 6.57%
6 Small General Service On-Site Generation 8 101 461,158 $68,948 149.51 $4,533 $73,481 159.34 6.57%
7 Large General Service 9 39,016 3,939,445,695 $349,830,579 88.80 $21,935,190 $371,765,770 94.37 6.27%
8 Dusk to Dawn Lighting 15 0 2,615,028 $1,346,481 514.90 $48,479 $1,394,960 533.44 3.60%
9 Large Power Service 19 124 2,055,250,567 $151,168,918 73.55 $9,648,571 $160,817,489 78.25 6.38%
10 Agricultural Irrigation Service 24 19,515 1,829,051,780 $180,486,395 98.68 $15,849,613 $196,336,008 107.34 8.78%
11 Unmetered General Service 40 1,663 14,381,350 $1,457,562 101.35 $100,681 $1,558,243 108.35 6.91%
12 Street Lighting 41 3,324 20,670,727 $3,814,602 184.54 $218,214 $4,032,816 195.10 5.72%
13 Traffic Control Lighting 42 766 2,983,484 $241,385 80.91 $20,817 $262,202 87.88 8.62%
14 Total Uniform Tariffs 612,975 13,767,686,019 $1,417,527,867 102.96 $94,861,004 $1,512,388,871 109.85 6.69%
15 Total Special Contracts 5 1,264,873,695 $90,087,714 71.22 $4,432,215 $94,519,930 74.73 4.92%
16 Idaho Power Supplied Retail Sales 612,980 15,032,559,714 1,507,615,581 100.29 $99,293,220 $1,606,908,801 106.90 6.59%
(1)Test Year Revenue Forecast January 2024-December 2024(GRC)
(2) Impacts do not include Black Mesa and marginal energy sales

Idaho Power Company
Calculation of Revenue Impact
State of Idaho
IPC-E-24-07
Filed May 31,2024
Summary of Revenue Impact-Rates 9,19,and 24 Distribution Level Detail
Current Billed Revenue to Proposed Billed Revenue
Percent
Rate Average Normalized Current Adjustments Proposed Change
Line Sch. Number of Energy Base Mills to Base Base Mills Base to Base
No Tariff Description No. Customers(') (kWh)(') Revenue Per kWh Revenue Revenue Per kWh Revenue
Uniform Tariff Rates:
1 Large General Secondary 9S 38,725 3,299,187,444 $298,184,359 90.38 $18,774,625 $316,958,984 96.07 6.30%
2 Large General Primary 9P 288 635,765,089 $51,276,877 80.65 $3,137,920 $54,414,798 85.59 6.12%
3 Large General Transmission 9T 3 4,493,162 $369,343 82.20 $22,645 $391,988 87.24 6.13%
4 Total Schedule 9 39,016 3,939,445,695 $349,830,579 88.80 $21,935,190 $371,765,770 94.37 6.27%
5 Large Power Secondary 19S 1 6,730,275 $535,204 79.52 $34,449 $569,653 84.64 6.44%
6 Large Power Primary 19P 120 2,017,395,432 $148,422,477 73.57 $9,473,549 $157,896,025 78.27 6.38%
7 Large Power Transmission 19T 3 31,124,860 $2,211,237 71.04 $140,574 $2,351,811 75.56 6.36%
8 Total Schedule 19 124 2,055,250,567 $151,168,918 73.55 $9,648,571 $160,817,489 78.25 6.38%
9 Irrigation Secondary 24S 19,515 1,829,051,780 $180,486,395 98.68 $15,849,613 $196,336,008 107.34 8.78%
10 Irrigation Transmission 24T 0 0 $0 0.00 $0 $0 0.00 0.00%
11 Total Schedule 24 19,515 1,829,051,780 $180,486,395 98.68 $15,849,613 $196,336,008 107.34 8.78%
(1)Test Year Revenue Forecast January 2024-December 2024(GRC)

BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION
CASE NO. IPC-E-24-07
IDAHO POWER COMPANY
ATTACHMENT NO. 4
ASSET RETIREMENT OBLIGATION
ENTRIES

-0IQAHO POWER,
MATT LARKIN
Revenue Requirement Senior Manager
mlarkinC&idahopower.com
VIA ELECTRONIC FILING
May 30, 2024
Commission Secretary
Idaho Public Utilities Commission
11331 W. Chinden Blvd., Bldg 8,
Suite 201-A (83714)
PO Box 83720
Boise, Idaho 83720-0074
RE: Case No. IPC-E-03-11
Annual Compliance Filing of Asset Retirement Obligations ("ARO") Accounting
Standards Codification ("ASC") 410
Dear Commission Secretary:
In Order No. 29414, the Idaho Public Utilities Commission directed Idaho Power Company
("Company")to record regulatory assets or liabilities associated with implementation of Statement
of Financial Accounting Standards 143 (now codified as Accounting Standards Codification
("ASC") 410). As a result of the Order, the Company is required to file annually, and as part of
any rate case filing, all journal entries made under the requirements of ASC 410.
On May 17, 2012, Order No. 32549 was issued authorizing the Company to begin recovery
of incremental costs related to the early closure of the Boardman power plant ("Boardman") and
established the Boardman balancing account which tracks the difference between cost and
revenues, including Boardman-related ARO balances. In addition, Order No. 32549 exempted
Boardman-related ARO balances from the deferral treatment required under Order No. 29414.
Pursuant to Order No. 29414, attached please find all journal entries made under the
requirements of ASC 410. If you have any questions regarding this filing, please contact
Regulatory Consultant Courtney Waites at [phone] or cwaites _idahopower.com.
Very truly yours,
Matt Larkin
MTL/sg
Enclosures
cc: Terri Carlock

Idaho Power Company
Accounting Standards Codification 410 (previously FAS 143)Accounting
Year Ended December 31,2023
Recorded journal entries
FERC Account Dr. Cr.
December 31,2022 balances
ARO Assets 101/107 28,236,601
Accumulated depreciation-ARO assets 108 - 21,023,468
Accumulated depreciation-removal costs 108 180,087,019 -
Cash 131 - 3,143,126
Regulatory assets 182.3/4/5/6 27,265,891 -
ARO Liabilities 230 - 37,494,839
Regulatory liabilities 254 - 180,087,019
Accretion expense(Boardman only),cumulative 411 2,222,416 -
Depreciation expense(Boardman only),cumulative 403 3,936,524
Calendar year 2023 Accretion,Depreciation,Regulatory Asset Amortization,and Removal Cost Entries
1 Regulatory asset(accretion expense) 182.3 1,162,513
Accretion expense(Boardman only) 411 12,995
ARO liabilities 230 1,175,508
To record accretion expense on the asset retirement
obligations
2 Regulatory asset(depreciation expense) 182.3 6,048,026
Accumulated depreciation-ARO assets 108 6,048,026
To record depreciation on the ARO assets
3 Accumulated depreciation-removal costs 108 4,717,803
Regulatory liabilities 254 4,717,803
To record adjustments to the ARO regulatory liability for the
difference between regulatory-approved removal costs and
the ASC 410 accruals
Calendar year 2023 changes in estimates
4 ARO Assets 107 11,683,135
Regulatory asset 182.3/182.4 335,083
ARO Liabilities 230 11,348,052
To record revision of estimated AROs at Valmy,Bridger,
and Boardman.
Calendar year 2023 retirements
5 Regulatory asset 182.3 385,519
Cash 131 784,006
ARO Liabilities 230 1,169,525
To primarily record retirements at Bridger and retirement
spend at Boardman.
December 31,2023 balances
ARO Assets 101/107 39,919,736 -
Accumulated depreciation-ARO assets 108 - 27,071,494
Accumulated depreciation-removal costs 108 175,369,216 -
Cash 131 - 3,927,132
Regulatory assets 182.3/4/5/6 33,755,829 -
ARO Liabilities 230 - 48,848,874
Regulatory liabilities 254 175,369,216
Accretion expense(Boardman only),cumulative 411 2,235,411 -
Depreciation expense(Boardman only),cumulative 403 3,936,524 -
Balance check: 255,216,715 255,216,715

BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF THE APPLICATION )
OF IDAHO POWER COMPANY FOR ) CASE NO. IPC-E-24-07
AUTHORITY TO INCREASE RATES FOR )
ELECTRIC SERVICE TO RECOVER )
COSTS ASSOCIATED WITH )
INCREMENTAL CAPITAL INVESTMENTS )
AND CERTAIN ONGOING OPERATIONS )
AND MAINTENANCE EXPENSES . )
IDAHO POWER COMPANY
DIRECT TESTIMONY
OF
TIMOTHY E . TATUM

1 Q. Please state your name, business address, and
2 present position with Idaho Power Company ("Idaho Power" or
3 "Company") .
4 A. My name is Timothy E . Tatum. My business
5 address is 1221 West Idaho Street, Boise, Idaho 83702 . I am
6 employed by Idaho Power as Vice President of Regulatory
7 Affairs .
8 Q. Please describe your educational background.
9 A. I earned a Bachelor of Business Administration
10 degree in Economics and a Master of Business Administration
11 degree from Boise State University. I have also attended
12 electric utility ratemaking courses, including "Practical
13 Skills for The Changing Electric Industry, " a course
14 offered through the New Mexico State University' s Center
15 for Public Utilities, "Introduction to Rate Design and Cost
16 of Service Concepts and Techniques" presented by Edison
17 Electric Utilities Consultants, Inc. , and Edison Electric
18 Institute' s "Electric Rates Advanced Course. " In 2012, I
19 attended the Utility Executive Course ("UEC") at the
20 University of Idaho .
21 Q. Please describe your work experience with
22 Idaho Power.
23 A. I began my employment with Idaho Power in 1996
24 in the Company' s Customer Service Center where I handled
25 customer phone calls, customer-related transactions, and
TATUM, DI 1
Idaho Power Company

1 general customer account maintenance in the areas of
2 billing and metering.
3 In June of 2003, I began working as an Economic
4 Analyst on the Energy Efficiency Team. As an Economic
5 Analyst, I was responsible for ensuring that the demand-
6 side management ("DSM") expenses were accounted for
7 properly, preparing and reporting DSM program costs and
8 activities to management and various external stakeholders,
9 conducting cost-benefit analyses of DSM programs, and
10 providing DSM analysis support for the Company' s Integrated
11 Resource Plan.
12 In August 2004, I accepted a position as a
13 Regulatory Analyst and in August of 2006, I was promoted to
14 Senior Regulatory Analyst . As a Senior Regulatory Analyst,
15 my responsibilities included the development of complex
16 financial studies to determine revenue recovery and pricing
17 strategies, including preparation of the Company' s cost-of-
18 service studies .
19 In September of 2008, I was promoted to Manager of
20 Cost of Service, and in 2011, I was promoted to Senior
21 Manager of Cost of Service and oversaw the Company' s cost-
22 of-service activities, such as power supply modeling,
23 jurisdictional separation studies, class cost-of-service
24 studies, and marginal cost studies .
25
TATUM, DI 2
Idaho Power Company

1 In March 2016, I was promoted to Vice President of
2 Regulatory Affairs . As Vice President of Regulatory
3 Affairs, I am responsible for the overall coordination and
4 direction of the Regulatory Affairs Department, including
5 development of jurisdictional revenue requirements and
6 class cost-of-service studies, preparation of rate design
7 analyses, and administration of tariffs and customer
8 contracts .
9 Q. What is the purpose of your testimony in this
10 proceeding?
11 A. My testimony presents Idaho Power' s request
12 for rate relief related to a limited set of revenue
13 requirement categories, including 2024 incremental plant
14 additions to rate base and incremental ongoing labor costs,
15 both as measured from the revenue requirement approved by
16 Order No . 36042 issued in the Company' s last general rate
17 case, IPC-E-23-11 ("2023 GRC") .
18 My testimony will also inform the Idaho Public
19 Utilities Commission ("Commission") of the circumstances
20 driving the need for the Company' s request including
21 sustained customer growth requiring significant, ongoing
22 capital investment necessary to maintain a safe, reliable
23 electric system into the future. Correspondingly, the
24 Company believes that such growth warrants careful
25 consideration of appropriate ratemaking methodologies that
TATUM, DI 3
Idaho Power Company

1 balance timely cost recovery with affordability for
2 customers .
3 Q. What role did you play in the preparation of
4 the limited issue rate request?
5 A. My role in the preparation of this case was to
6 oversee, manage, and coordinate the filing and to make the
7 policy decisions related to regulatory matters in
8 consultation with other senior officers within Idaho Power.
9 Q. What is Idaho Power' s request in this case?
10 A. Idaho Power is requesting to increase Idaho
11 base rates to include 2024 capital additions and to reflect
12 ongoing labor-related operations and maintenance ("0&M")
13 expenses ("0&M Labor") since the Company' s 2023 GRC. If
14 approved, this request would result in an overall increase
15 to Idaho jurisdictional base revenue of approximately $99 . 3
16 million, or 7 . 31 percent, effective January 1, 2025 .
17 Q. Why is Idaho Power proposing these specific
18 adjustments rather than filing a general rate case?
19 A. Idaho Power developed the scope of this
20 proceeding with the goal of balancing timely cost recovery
21 while keeping customer affordability top-of-mind. Idaho
22 Power plans to invest nearly one billion dollars in its
23 system in 2024 and an average of $796 million over the next
24 five years to meet the growing customer demand and to
25 maintain a safe, reliable electric system. The associated
TATUM, DI 4
Idaho Power Company

1 incremental depreciation and interest expense is of a level
2 that Idaho Power cannot earn a reasonable rate of return
3 nor maintain sufficient cash flow metrics without the
4 relief sought in this case. The Company is also
5 experiencing increased labor costs to attract and retain a
6 skilled workforce and other inflationary pressures
7 throughout its business .
8 As the Company developed its plan for this case,
9 thoughtful recognition was given to the fact that the
10 Commission issued an order approving its last general rate
11 case just months ago. That general rate case involved a
12 full audit and review of the Company' s financial
13 information, over a decade of capital investment, rates of
14 return, service levels, cost-of-service studies, rate
15 design, rules and regulations and more. Rather than
16 starting this process over again just months after the
17 prior case concluded, the Company looked specifically at
18 what cost drivers must be addressed through an immediate
19 rate request and which revenue requirement components it
20 could forego revisiting in the near-term by applying
21 diligent cost management . The Company believes the targeted
22 approach to cost recovery presented in this case will
23 provide timely cost recovery, while minimizing the rate
24 increases customers might otherwise experience with a full
25 general rate case.
TATUM, DI 5
Idaho Power Company

1 Q. Please provide an overview of the Company' s
2 limited scope rate case filing.
3 A. The Company begins the presentation of its
4 case with my testimony, which provides a general overview
5 of the case and covers Idaho Power' s current financial and
6 operating situation driving the need for the requested rate
7 relief. My testimony also addresses certain regulatory
8 policy matters related to the development and need for this
9 limited scope rate case . Finally, my testimony presents the
10 Company' s recommendation regarding the derivation of class-
11 specific revenue targets and development of rates .
12 Mr. Matthew Larkin, Revenue Requirement Senior
13 Manager, discusses the development of the Idaho Results of
14 Operations ("ROO") and the conclusions that can be drawn
15 from the analysis . Mr. Larkin also describes how the
16 Company utilized the 2023 GRC settlement as a starting
17 point from which he made adjustments to determine the 2024
18 incremental revenue requirement. Once he determined the
19 system-level 2024 incremental revenue requirement, Mr.
20 Larkin supervised the preparation of the jurisdictional
21 separation study utilized to determine the Idaho
22 jurisdictional incremental revenue requirement.
23 Mr. Eric Hackett, Projects and Resource Development
24 Director, discusses generation-related major projects
25 expected to be completed during 2024 . He presents the
TATUM, DI 6
Idaho Power Company

1 prudent nature of these investments, detailing why they are
2 needed to ensure Idaho Power' s generation fleet is robust
3 and well-positioned to provide continued safe, reliable
4 service to customers . Mr. Hackett is also the witness who
5 presents the costs associated with the utility-scale
6 battery projects placed into service in 2024 and explains
7 why the investment in these facilities reflects the least-
8 cost, least-risk option to ensure sufficient capacity to
9 meet customer demand in 2024 and beyond.
10 Finally, Mr. Mitch Colburn, Vice President of
11 Planning, Engineering and Construction, discusses
12 investments the Company has made in the electrical grid to
13 ensure the provision of safe, reliable service to
14 customers . Mr. Colburn presents the transmission and
15 distribution-related investments expected to be completed
16 in 2024 that demonstrate the Company' s prudent investment
17 in the electrical grid at the transmission and distribution
18 levels . He also discusses the Wood River Valley Reliability
19 Project, a combined distribution and transmission project,
20 the distribution portion of those investments which are
21 proposed for recovery in this case. Mr. Colburn concludes
22 with a discussion of a project resulting from a grid
23 modernization initiative.
24 Q. Did Idaho Power discuss this limited scope
25 rate case concept with the Commission Staff ("Staff") and
TATUM, DI 7
Idaho Power Company

1 other key stakeholders?
2 A. Yes . On March 7, 2024, Idaho Power met with
3 Staff and all intervening parties from the 2023 GRC to
4 discuss the merits of a potential limited scope rate
5 proceeding in lieu of a full general rate case. At that
6 meeting, the Company presented a high-level "strawman"
7 proposal for the potential scope and structure of such a
8 filing and answered questions from the group. Following
9 that meeting, Staff met with the same parties without the
10 Company present to further discuss the merits of a limited
11 scope filing. After that second meeting, Staff notified the
12 Company that it was generally supportive of the Company' s
13 proposed limited scope case approach, and subsequently,
14 each of the other parties indicated their alignment with
15 Staff.
16 Q. Did Staff or the other parties agree to any
17 specific methodologies for preparing the limited scope
18 case?
19 A. No. Staff and parties indicated support for a
20 limited scope case in concept but wanted to reserve the
21 right to review and potentially present alternative
22 ratemaking methodologies within the defined case scope
23 during the processing of the case.
24 Q. How did the Company prepare the 2024
25 incremental revenue requirement in this proceeding?
TATUM, DI 8
Idaho Power Company

1 A. Idaho Power prepared its 2024 incremental
2 revenue requirement in this case using the same general
3 rate base and labor forecast methodologies used in the 2023
4 GRC, with certain adjustments . However, instead of starting
5 with actual 12-month financial results, adjusted to include
6 typical and traditional ratemaking adjustments, the Company
7 has used the final approved revenue requirement from the
8 2023 GRC as the starting point to determine the incremental
9 revenue requirement .
10 Q. Is the Company requesting authority to adjust
11 its authorized rate of return or any other revenue
12 requirement categories as part of this case?
13 A. No. The Company' s request applies the overall
14 rate of return approved in the 2023 GRC and does not seek
15 to adjust any other revenue requirement components such as
16 non-labor 0&M expense, net power supply costs, other
17 revenue, etc . Under the Company' s proposal, base rates
18 would continue to reflect the 2023 GRC settlement amounts
19 for those categories considered "out of scope" for this
20 case .
21 Q. Are there any other revenue requirement
22 categories considered out of scope in this case?
23 A. Yes . Idaho Power has excluded any expected
24 2024 capital projects associated with the Jim Bridger Power
25 Plant ("Bridger") and the North Valmy Generating Station
TATUM, DI 9
Idaho Power Company

1 ("Valmy") from the incremental 2024 revenue requirement .
2 For each of these plants, Idaho Power currently has in
3 place separate rate mechanisms that utilize balancing
4 accounts and levelized revenue collection to smooth
5 recovery over the assets' remaining lives . Because of the
6 changing nature of operations at these facilities (i .e. ,
7 changing end-of-life assumptions and/or conversion to
8 natural gas) , Idaho Power intends to make a filing before
9 the Commission in the coming months to update the
10 mechanisms for both Bridger and Valmy. Consequently, the
11 Company has excluded 2024 Bridger and Valmy investments
12 from this case.
13 Q. Is the Company presenting a new class cost-of-
14 service study ("COSS") or any rate structural changes as
15 part of this case?
16 A. No. The request in this case relies on the
17 class COSS from the 2023 GRC and does not propose any rate
18 structural changes, as described in greater detail later in
19 my testimony.
20 I . OPERATIONAL AND FINANCIAL CONSIDERATIONS
21 Q. Why do you believe the increase requested in
22 this case is necessary?
23 A. The requested increase is important for Idaho
24 Power to have an opportunity to achieve fair and timely
25 recovery of its prudently incurred expenses and a
TATUM, DI 10
Idaho Power Company

1 reasonable return on the Company' s investment in its
2 electrical system, which today' s rates will not fully
3 provide . High growth in customer demand for electricity,
4 aging infrastructure, and higher compliance and reliability
5 requirements are driving the need to invest large amounts
6 of capital to expand and improve electricity supply,
7 delivery, and reliability. This increases the Company' s
8 need to access both the debt and equity markets to fund
9 large amounts of capital investment in the system. In this
10 environment, timely and fair recovery of the Company' s
11 prudently incurred expenses and investments is critically
12 important to helping it attract capital investment and
13 manage financing costs, which ultimately benefits the
14 Company' s customers .
15 Q. What are the challenges facing the Company?
16 A. Rising prices and costs and constrained system
17 capacity are challenges facing many utilities in the West,
18 and Idaho Power is no different. Despite considerable
19 investment and expansion in recent years, much of the
20 Company' s system today is fully utilized by our current
21 customers and the Company continues to experience sustained
22 customer growth. To provide safe, reliable service to all
23 customers, the Company must continue to make major
24 investments in both new and existing infrastructure.
25 Supply chain constraints and worldwide demand for the
TATUM, DI 11
Idaho Power Company

1 materials and services required to build needed
2 infrastructure have driven up prices dramatically in recent
3 years .
4 Idaho Power' s credit quality, as measured by the
5 national credit rating agencies, is now near the low end of
6 investment grade . Since February 2023, two credit rating
7 agencies have issued notices that Idaho Power' s credit
8 metrics have deteriorated. And one of those agencies
9 currently has the Company on "negative outlook. " Rates in
10 effect today will not provide the Company with sufficient
11 cash flow nor an opportunity to earn a rate of return
12 necessary to assure adequate access to the capital markets
13 to finance needed investments in 2025 and beyond. Any delay
14 in or lack of recovery of prudent operating or financing
15 costs is seen as risk by the financial community, including
16 the credit rating agencies, during this period of growth in
17 capital investment.
18 Q. You mentioned growth in investment over the
19 next few years . What is driving that growth in investment?
20 A. The Company' s service area continues to
21 experience rapid growth. Idaho Power' s customer base grew
22 by 2 . 4 percent in 2023, and it now serves more than 630, 000
23 customers . The Company also established a new all-time
24 winter peak load of 2, 719 megawatts in January 2024 .
TATUM, DI 12
Idaho Power Company

1 Since 2010, the Company' s actual system peak has
2 grown 1 . 5 percent per year on average, and over the next
3 five years Idaho Power expects to experience unprecedented
4 growth with an annual system peak increase of approximately
5 3 . 7 percent per year. This growth includes several new and
6 expanding large load customers, including the nearly 1
7 million square-foot Meta data center, Lamb Weston' s $415
8 million plant expansion and Micron' s $15 billion dollar
9 expansion.
10 The Company must be financially prepared to serve
11 that growth as it occurs . To provide safe, reliable service
12 to all customers, the Company must make investments in both
13 new and existing infrastructure. The Company is adding
14 capacity to its generation fleet, transmission system, and
15 distribution facilities to ensure an adequate supply of
16 electricity to customers, to provide service to new
17 customers, and to maintain system reliability.
18 Idaho Power' s aging transmission and distribution
19 infrastructure requires continued investment in upgrades
20 and replacement to maintain their operational viability.
21 The Company' s aging hydroelectric and thermal generation
22 facilities also require continuing investment in upgrades
23 and component replacement. Further, the Company is
24 operating in an environment of ever-increasing reliability
25 and compliance standards that also require increased levels
TATUM, DI 13
Idaho Power Company

1 of investment .
2 Q. What is the level of capital investment needed
3 to maintain a safe, reliable grid and support the level of
4 growth expected over the next five years?
5 A. As can be seen on Exhibit No. 1, the Company
6 plans to invest nearly one billion dollars in new
7 infrastructure in 2024 and an average annual investment of
8 $796 million over the next five years, with the potential
9 for that amount to increase notably based on additional
10 infrastructure needs to serve customer growth. The
11 associated depreciation expense is expected to grow by
12 $31 . 5 million in 2024 and will continue to increase over
13 the next five years .
14 The Company cannot absorb the depreciation and
15 financing expense associated with the incremental plant
16 investment without the requested rate relief in this case,
17 and likely subsequent rate adjustments going into the
18 future .
19 Q. How have rising interest rates impacted Idaho
20 Power' s financing costs?
21 A. Over the last decade, Idaho Power has taken
22 advantage of historically low interest rates . However,
23 borrowing costs have risen dramatically since December
24 2021, as the Federal Reserve has taken action to address
25 inflation in the United States ("US") economy. As seen in
TATUM, DI 14
Idaho Power Company

1 Figure 1, as of May 21, 2024, 30-year US Treasury bond
2 yields have risen from around 1 . 8 percent near the start
3 of 2022 to as high as 5 . 1 percent in late 2023 and have
4 recently been between 4 . 5 to 4 . 6 percent, a 150 percent
5 increase over that period.
6 FIGURE 1
30-Year Bond
6%
5%
4%
3%
2%
1%
0%
7 May 21 Sep 21 Feb 22 Jun 22 Oct 22 Mar 23 Jul 23 Nov 23 Apr 24
8 Rapidly rising interest rates during an environment
9 of rapid economic growth not only increases the cost of
10 financing but also challenges Idaho Power' s ability to
11 raise sufficient capital in the public and private debt
12 markets .
13 It should also be noted that when borrowing costs
14 rise, the ripple effects make their way into all of Idaho
15 Power' s commodities, materials, purchased services, and
16 other costs . This happens because the Company' s vendors
17 and counterparties need to price their rising borrowing
TATUM, DI 15
Idaho Power Company

1 costs into the prices they charge to Idaho Power. And
2 while macro-economic inflation seems to be curbing from
3 recent highs, higher borrowing costs are more likely to
4 persist over the longer term.
5 Q. Can you cite examples that show how inflation
6 has impacted the procurement of supplies?
7 A. A combination of supply and demand factors
8 have resulted in persistent high inflation since early
9 2020 . Idaho Power is continuing to see escalated pricing
10 across most commodities : Since 2020, core steel is up 113
11 percent, aluminum pricing is up 26 percent, and high-grade
12 copper has increased 43 percent.
13 These increases translate directly into price
14 escalations for key pieces of equipment needed to serve
15 our customers and maintain the reliability of our system.
16 The average cost of transformers has increased by 68
17 percent, wood poles by 46 percent, and electrical cable by
18 52 percent.
19 Other factors driving procurement pricing
20 escalations are the cost of labor and the cost of freight.
21 In addition, capacity availability among manufacturers in
22 our industry has not been able to meet demand, causing the
23 Company to go to new suppliers that are charging higher
24 prices .
25
TATUM, DI 16
Idaho Power Company

1 II . REGULATORY LAG
2 Q. What is meant by the term "regulatory lag?"
3 A. James C. Bonbright defined regulatory lag as
4 "the quite usual delay between the time when reported rates
5 of profit are above or below standard and the time when an
6 offsetting rate decrease or increase may be put into effect
7 by commission order or otherwise. "' In the context of this
8 particular rate proceeding, regulatory lag refers to the
9 time period between when a capital investment is made by
10 the Company and when the Company begins to recover that
11 investment through customer rates . Further, the same
12 concept is applicable to 0&M Labor costs in this instance.
13 Q. What attributes should be considered when
14 assessing the impacts of regulatory lag?
15 A. The ratemaking process is inherently
16 prospective and requires reliance upon projections . It
17 requires an informed determination of what conditions will
18 prevail in the future. As of the date of filing, Idaho
19 Power has used its best financial and operational
20 information to construct its 2024 incremental revenue
21 requirement .
22 Utilities that operate in a period of rapid
23 expansion and rate base growth, like Idaho Power is today,
1 James C. Bonbright, Principles of Public Utility Rates 96 (2d ed.
1988) .
TATUM, DI 17
Idaho Power Company

1 will chronically under-earn if ratemaking process relies
2 solely on historical financial information and fails to
3 synchronize the matching of future expenses and revenues .
4 Ultimately, Idaho Power must apply a ratemaking
5 approach that is both timely and reflective of the costs
6 that the Company can reasonably expect to incur going
7 forward. A ratemaking approach based on a reasonable
8 forecast, as well as reasonable known and measurable
9 adjustments, will be more indicative of the costs the
10 Company will be experiencing during the time rates are in
11 place, thereby reducing the negative effects of regulatory
12 lag.
13 Q. Why is regulatory lag such a critical issue
14 to Idaho Power at this time?
15 A. During this current period of escalating
16 costs where marginal costs are higher than average costs,
17 new rates are already inadequate by the time they go into
18 place . If this situation continues for a prolonged period,
19 the Company will be denied a reasonable opportunity to earn
20 its authorized rate of return . The effects of regulatory
21 lag are particularly pronounced because the Company is
22 currently engaged in capital-intensive projects where
23 interest rates to finance capital projects have remained at
24 relatively elevated levels .
25
TATUM, DI 18
Idaho Power Company

1 Q. Has regulatory lag had an impact on the
2 Company' s credit ratings?
3 A. Yes . Moody' s recently placed Idaho Power' s
4 current Baal credit rating on "negative outlook" and a
5 February 2023 note from Standard and Poor' s ("S&P")
6 indicated a downgrading of its liquidity assessment of the
7 Company from "strong" to "adequate"; these actions by the
8 ratings agencies provide a backdrop for Idaho Power' s need
9 to increase its cash collections from customers .
10 Any credit rating changes would likely impact both
11 short-term and long-term borrowing costs and IDACORP' s
12 cost of equity, as lower ratings drive higher risk
13 premiums, and would also likely impact Idaho Power' s
14 wholesale commodity contracts, and the perception of
15 suppliers, contractors, and other vendors on our ability
16 to pay for normal 0&M costs, as well as construction
17 contracts .
18 Q. What rationale was given by the ratings
19 agencies to support their recent actions regarding Idaho
20 Power' s credit ratings?
21 A. Moody' s stated, "without the benefit of more
22 incremental and timelier rate relief through riders,
23 quicker asset recovery via depreciation rates or more
24 frequent base rate increases, IPC' s credit metrics will no
25 longer be sustained at levels supportive of the Baal
TATUM, DI 19
Idaho Power Company

1 rating. "z Moody' s also cited wildfire risks as a factor
2 weighing down Idaho Power' s credit metrics; however,
3 Moody' s also pointed to positive actions the Company is
4 taking to mitigate wildfire risks in its service
5 territory. A copy of Moody' s press release is included as
6 Exhibit No. 2 . Further, S&P cited the Company' s
7 reliability and economic growth-driven capital spending
8 needs as reflecting its liquidity downgrade, as it
9 perceives "elevated capital spending that will result in a
10 modest weakening of the company [' s] liquidity throughout
11 the forecast period. "3 A Copy of S&P' s Research Update is
12 included as Exhibit No. 3 .
13 Q. Is Idaho Power recommending any specific
14 ratemaking adjustments in this case to mitigate the
15 negative impacts of regulatory lag?
16 A. Yes . First, the Company requests approval of
17 2024 incremental rate base of approximately $731 million
18 based on year-end 2024 projected plant balances . The use of
19 year-end plant balances as opposed to a historical monthly
20 average will ensure that the rate base included in customer
21 rates reflects plant investments placed in service up to
22 the time rates go into effect, thereby reducing, albeit not
2 Rating Action: Moody' s changes IDACORP and Idaho Power outlooks to
negative; affirms ratings, Moody's Investors Service 2 (Mar. 7, 2024) .
3 IDACORP Inc, Idaho Power Co Liquidity Assessments Revised to Adequate;
`BBB' Long- And `A-2' Short-Term Rtgs Affirmed 1 (Feb. 7, 2023) .
TATUM, DI 20
Idaho Power Company

1 eliminating, regulatory lag. Second, the Company proposes
2 to adjust base rates to reflect projected labor costs that
3 will exist at the time rates go into effect. That is, the
4 Company is requesting recovery of 2024 labor costs adjusted
5 to include a projected 2025 general wage adjustment to
6 represent labor costs that will be in effect on January 1,
7 2025 .
8 Q. To what extent does the Company' s proposed
9 rate base determination reduce regulatory lag?
10 A. The effectiveness of the Company' s proposed
11 year-end 2024 plant balance method at reducing the harmful
12 impact of regulatory lag is demonstrated by comparison with
13 the 13-month average historical plant balance method, which
14 would reduce system-level plant-in-service in this case by
15 approximately $337 million. That is, the use of a 13-month
16 average rate base method would result in approximately $337
17 million dollars of capital investment that Idaho Power will
18 have made to serve its customers safely and reliably by
19 January 1, 2025, not being eligible to earn an authorized
20 rate of return until some future rate case.
21 Q. Has the Commission previously approved the use
22 of projected year-end plant balances for rate base
23 determinations in past rate proceedings?
24 A. Yes . In Idaho Power' s 2008 General Rate Case,
25 IPC-E-08-10, the Commission approved the use of projected
TATUM, DI 21
Idaho Power Company

1 year-end plant balances for projects having a cost more
2 than $2 million.' The Commission again approved this year-
3 end plant balance methodology when it approved a settlement
4 stipulation in the Company' s 2011 General Rate Case, IPC-E-
5 11-08, in Order No. 32426 .
6 Q. What is the expected dollar amount of the 2025
7 general wage adjustment proposed for recovery in this case?
8 A. The inclusion of the expected 2025 general
9 wage adjustment in this case increased the incremental
10 revenue requirement by $5 . 9 million on a system basis . This
11 represents the projected incremental 2025 costs associated
12 with attracting and retaining a skilled workforce.
13 Excluding these costs from base rates effective January 1,
14 2025, would negatively impact the Company' s cash flow
15 metrics and decrease Idaho Power' s opportunity to earn its
16 authorized rate of return.
17 Q. Do you believe the relief requested in this
18 case will serve to stabilize or improve the Company' s
19 credit ratings going forward?
' Case No. IPC-E-08-10, Order No. 30722 at 8-9 ("The Commission accepts
the adjustments Idaho Power made to the test year rate base to add
capital investments of less than $2 million, and to add and annualize
actual investments greater than $2 million. Staff reviewed the group of
smaller investments as projected for 2008 and determined the projected
balances are reasonable for what was anticipated to be actual costs by
the end of the year. The Commission's acceptance of this adjustment
should not be seen as a blanket endorsement of the forecast methodology
used to add smaller plant costs to test year rate base. The burden
remains on the Company to demonstrate that its proposed test year
balances represent known and measurable expenditures.")
TATUM, DI 22
Idaho Power Company

1 A. Not necessarily. The requested rate relief is
2 unlikely to improve the ratings, and there is still a risk
3 that one or both rating agencies may downgrade the
4 Company' s credit ratings . The credit rating agencies have
5 built their models and assumptions, in part, based on
6 forecasts Idaho Power has discussed with them. Those
7 forecasts have contemplated the rate relief requested in
8 this case . The request in this case seeks to address more
9 timely cash collections related to capital investments with
10 the use of the year-end plant balance method, which will be
11 viewed by the credit rating agencies as positive for their
12 assumed liquidity and other credit metrics . However, in
13 light of the continued regulatory lag that would exist
14 during 2025 even with the use of period-end rate base, the
15 Company' s credit metrics will remain under pressure.
16 Financing capital expenditures with indebtedness at
17 relatively high interest rates, dilutive equity issuances,
18 and inadequate offsetting operating cash flow from
19 collection through customer rates combine to put pressure
20 on the Company' s financial condition and credit metrics in
21 2024 and 2025, and in subsequent years absent further
22 reduction in regulatory lag.
23 Q. Is regulatory lag always harmful to a
24 utility?
25
TATUM, DI 23
Idaho Power Company

1 A. No . The impact of regulatory lag is
2 dependent upon the situation - if overall revenue growth is
3 keeping pace with cost escalation, and the Company is not
4 engaged in capital-intensive projects and procuring debt
5 and equity financing for those projects, then the Company
6 is not typically harmed by regulatory lag. Unfortunately,
7 Idaho Power is not in that situation currently, and will
8 not likely be for the foreseeable future .
9 III . DILIGENT COST MANAGEMENT
10 Q. Please describe the Company' s efforts to
11 reduce expenses related to hiring employees .
12 A. All new, un-budgeted positions must be
13 reviewed and approved by the Company' s Chief Financial and
14 Chief Operating Officers . The Company' s careful management
15 of labor costs is evidenced by the fact that, even with
16 adding approximately 120, 500 customers between 2013 and
17 2023, employee headcount has only increased by 72 people
18 over the same time period. That is an increase in customer
19 count of 23 . 9 percent over that period, and an increase of
20 only 3 . 5 percent in labor count over that same period.
21 Q. What is Idaho Power' s general compensation
22 philosophy?
23 A. Idaho Power' s compensation philosophy is to
24 provide a balanced, competitive, and sustainable total
25 compensation or "total rewards" package, ensuring it
TATUM, DI 24
Idaho Power Company

1 attracts and retains high quality employees and motivates
2 them to achieve performance goals that benefit customers
3 and shareholders . Maintaining a competitive total rewards
4 package allows the Company to recruit and retain its highly
5 skilled workforce. The competitiveness of Idaho Power' s
6 total rewards package also supports the Company' s intent to
7 maintain a flexible workforce that can easily adjust work
8 duties and assignments to meet changing demands and
9 operational needs, which in turn keep the Company' s costs
10 of service lower.
11 Q. Please describe the Company' s efforts to
12 control budgets .
13 A. Idaho Power employs a robust capital and 0&M
14 budgeting process . The capital budget process begins with
15 maintenance personnel, planners, and others within the
16 business identifying needs and submitting projects to
17 business unit management. Business unit management reviews
18 submitted projects and prioritizes them based on spending
19 guidelines provided by senior management.
20 0&M budgets are established based on extensive
21 discussions between the business units and senior
22 management and represent a combination of prior year
23 experience plus or minus identified changes and
24 adjustments . As the Company prepared its 0&M budgets for
25 2024, the target was based on holding to a 2023 budget
TATUM, DI 25
Idaho Power Company

1 adjusted down for known items and with only identified
2 unavoidable increases allowed as an adjustment.
3 Throughout the year, senior management reviews the
4 status of spending for both 0&M and capital against updated
5 estimates as well as original budget. Variances are
6 reviewed and analyzed in order to determine changes that
7 may need to be made during the year to manage to budgeted
8 levels of spend.
9 Q. Have the Company' s cost-control measures
10 applied over the last decade been successful?
11 A. Yes, very much so. As can be seen in Figure 2,
12 the Company' s overall 0&M expenses, excluding power supply
13 expenses and demand-side management expenses, have remained
14 relatively flat between 2012 and 2023, with an uptick in
15 2022 and 2023 resulting from recent inflationary pressures .
16 Even with those recent inflationary factors, the Company
17 has held 0&M expenses to an average annual growth rate of
18 just over 1 percent over that period.
19
20
21
22
23
24
25
TATUM, DI 26
Idaho Power Company

1 FIGURE 2
2 2012-2023 Operating and Maintenance Expenses
$450
$400
$350
$300
$250
$200
$150
$100
$50
$0
3 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023
4
5 IV. IDAHO RESULTS OF OPERATIONS
6 Q. Has the Company prepared an analysis that
7 supports the need for the rate relief requested in this
8 case?
9 A. Yes . As detailed in Mr. Larkin' s testimony,
10 the Company has prepared a 2024 pro-forma ROO to
11 demonstrate that existing rates resulting from the
12 settlement stipulation ("2023 Stipulation") approved in the
13 Company' s most recently completed 2023 GRC, do not provide
14 for sufficient cost recovery given investment and cost
15 expectations for 2024 . The ROO demonstrates that a rate
16 adjustment is needed to appropriately capture increasing
17 costs and ensure the Company remains financially healthy
18 and able to continue providing safe, reliable electric
19 service to customers .
20 Q. Please generally describe the methodology
21 utilized to develop the ROO.
TATUM, DI 27
Idaho Power Company

1 A. The starting point for the ROO is actual
2 2023 year-end results . The Company then applied typical
3 ratemaking adjustments, such as the normalization of
4 revenues and the removal of non-rate case items such as
5 Energy Efficiency Rider funded expenses and revenues, to
6 develop adjusted year-end 2023 results . Then, to provide a
7 consistent comparison with the results of the 2023 GRC,
8 Idaho Power applied certain ratemaking adjustments as
9 contemplated in the 2023 Stipulation to align the ROO with
10 the methodological results of that case . Finally, the
11 Company layered on incremental capital and 0&M Labor
12 expectations to determine the sufficiency of current rates
13 to provide adequate cost recovery.
14 Q. What are the results of the ROO?
15 A. The results of the ROO indicate revenue from
16 existing rates falls short of the level required to provide
17 Idaho Power with a reasonable opportunity to earn its
18 authorized rate of return. As described by Mr. Larkin, the
19 ROO indicates an expected rate of return ("ROR") of 5 . 80
20 percent in 2024, which reflects an Idaho jurisdictional
21 return on equity ("ROE") of 6 . 7 percent. These values are
22 well below the Company' s currently authorized ROR of 7 . 247
23 percent and currently authorized ROE of 9 . 6 percent.
24 Q. Based on these results, is it necessary to
25 increase Idaho Power' s retail rates?
TATUM, DI 28
Idaho Power Company

1 A. Yes . The 2024 incremental revenue request of
2 $99, 293, 220 is justified and necessary given the results of
3 the ROO. Absent the requested rate increase, current base
4 rate revenue is not sufficient to allow the Company even a
5 slight chance to earn near its authorized ROR or to
6 maintain adequate cash flow metrics as it continues to make
7 significant levels of investment in the electrical grid.
8 V. REVENUE SPREAD
9 Q. Please describe Idaho Power' s proposed method
10 of assigning the incremental revenue requirement of
11 $99, 293, 220 to individual classes of customers?
12 A. The Company proposes to spread the incremental
13 revenue requirement to customer classes in a manner that
14 relies on agreed upon methods from the 2023 Stipulation.
15 More specifically, the Company' s proposed method consists
16 of two steps : (1) the class cost-of-service methodology
17 filed in the 2023 GRC is relied upon to allocate the
18 incremental rate base and expenses to customer classes, and
19 then (2) the cap and spread parameters agreed to in the
20 2023 Stipulation are then applied to each customer class .
21 These parameters include a cap of 130 percent and a floor
22 of 50 percent of the overall 7 . 31 percent increase, or 9 . 50
23 and 3 . 65 percent, respectively. As a result, the Company
24 proposes the following allocation of the base price
25 increase by rate schedule:
TATUM, DI 29
Idaho Power Company

1 FIGURE 3
Proposed
Rate
Customer Class Change
Residential Service - Schedule 1, 3, 5 and 6 7.25%
Small General Service - Schedule 7 and 8 7.30%
Large General Service, Secondary - Schedule 9 6.86%
Large General Service, Primary/Transmission - Schedule 9 6.74%
Area Lighting - Schedule 15 3.65%
Large Power Service - Schedule 19 7.10%
Irrigation Service - Schedule 24 9.50%
Non-Metered General Service - Schedule 40 7.46%
Municipal Street Lighting - Schedule 41 5.96%
Traffic Control Lighting - Schedule 42 9.50%
Micron Special Contract - Schedule 26 5.53%
Simplot Pocatello Special Contract - Schedule 29 4.58%
DOE/INL Special Contract - Schedule 30 3.84%
2
3 Q. Do you have an exhibit that details the class
4 revenue requirement determination?
5 A. Yes . Exhibit No. 4 provides a detailed
6 walkthrough of the revenue requirement allocation process .
7 This includes the derivation of the class cost-of-service
8 results, the application of cap and spread parameters, and
9 the final revenue allocation by customer class .
10 Q. Did the Company consider other rate spread
11 methods?
12 A. Yes . The Company considered the merits of two
13 alternative methods, the first of which results in
14 allocating the requested increase to the customer classes
15 based on a pro-rata share of the revenue increase from the
16 Commission-approved settlement stipulation in the last
17 general rate case . The second alternate method results in a
18 uniform percentage increase for each customer class . While
19 these approaches are more simplified than the Company' s
TATUM, DI 30
Idaho Power Company

1 proposed method, neither of these alternative approaches
2 recognize the cost drivers specific and unique to this case
3 and, therefore, would result in additional inter-class
4 subsidization. The Company acknowledges that parties did
5 not explicitly agree to the underlying assumptions in the
6 class cost-of-service study in the 2023 GRC; however, the
7 study was relied upon for class allocation purposes in the
8 2023 Stipulation, and therefore, the Company is proposing
9 to maintain consistency with this approach to allocate the
10 revenue increase to customer classes equitably.
11 Q. How did the Company develop its proposed
12 adjustments for special contract customer rates?
13 A. Consistent with the 2023 class COSS, Micron
14 (Schedule 26) , Simplot - Pocatello (Schedule 29) , and the
15 United States Department of Energy (Schedule 30) , customers
16 received their own individual revenue allocations . While
17 the 2024 sales forecast included Simplot - Caldwell
18 (Schedule 32) and Lamb Weston (Schedule 34) as individually
19 forecasted loads, because both were included as part of the
20 Schedule 19 customer class in the 2023 GRC, their
21 forecasted sales were included in the Schedule 19 class for
22 purposes of developing the Schedule 19 class revenue
23 spread.' Accordingly, the non-Service Charge rates for
6 Brisbie (Schedule 33) proposed rates adjusted in accordance with
Schedule 19, Large Power Service, Transmission rates. Rate increase not
applied to Block 2 Energy Charges.
TATUM, DI 31
Idaho Power Company

1 Schedules 32 and 34 changed uniformly to target the 7 . 10
2 percent increase allocated to the Large Power Service class
3 shown in Figure 3 above.'
4 Q. How does Idaho Power propose to apply the
5 proposed class revenue increase to customers' rates?
6 A. The Company is generally not proposing changes
7 to rate design with two exceptions . The proposal in this
8 case is to collect the increased customer class revenue
9 allocation through a uniform increase to each class ' s
10 applicable billing components with no change to the Service
11 Charge . However, for the residential classes (Schedules 1,
12 3, 5, and 6) , pursuant to the 2023 Stipulation and as
13 authorized by Commission Order No. 36042, the Company' s
14 service charge will increase from $10 to $15 on January 1,
15 2025, coincident with the rate changes proposed in this
16 case . Second, for Schedule 26, the Company proposes to only
17 collect the increased revenue allocation through the
18 demand-related charges in recognition of their Renewable
19 Resource Agreement .
20 VI . CONCLUSION
21 Q. Please summarize Idaho Power' s requested
22 revenue increase in this case?
' Rate increase not applied to Block 2 Energy Charges.
TATUM, DI 32
Idaho Power Company

1 A. The Company is requesting rate relief of
2 approximately $99 . 3 million. If approved, this request
3 would result in an overall increase to adjusted base
4 revenue of 7 . 31 percent effective January 1, 2025 .
5 Q. Can you explain why the Company' s requested
6 rate increase is important not only to Idaho Power but in
7 the best interest of customers?
8 A. This increase is important for Idaho Power to
9 achieve fair and timely recovery of its prudently incurred
10 expenses and a reasonable return on the Company' s
11 investment in its electrical system, which today' s rates
12 will not fully provide.
13 Timely and fair recovery of the Company' s prudently
14 incurred expenses and investments is vital in helping it
15 attract capital investment and manage financing costs, both
16 of which are critically important as the Company prepares
17 to serve its expected load growth reliably, safely, and
18 affordably, in part by making capital investments of at
19 least $4 billion over the next five years . By providing for
20 fair and timely recovery of the Company' s expenses it
21 incurs on behalf of customers and investments in the
22 systems and activities that serve its customers, this rate
23 increase is in the best interests of the Company, its
24 shareholders and debtholders who finance the Company' s
25 operations, and the people and communities the Company
TATUM, DI 33
Idaho Power Company

1 serves .
2 Q. Does this conclude your testimony?
3 A. Yes, it does .
4
5
TATUM, DI 34
Idaho Power Company

1 DECLARATION OF TIMOTHY E. TATUM
2 I, Timothy E . Tatum, declare under penalty of
3 perjury under the laws of the state of Idaho:
4 1 . My name is Timothy E. Tatum. I am employed
5 by Idaho Power Company as the Vice President of Regulatory
6 Affairs .
7 2 . On behalf of Idaho Power, I present this
8 pre-filed direct testimony and Exhibits Nos . 1 through 4 in
9 this matter.
10 3 . To the best of my knowledge, my pre-filed
11 direct testimony is true and accurate.
12 I hereby declare that the above statement is true to
13 the best of my knowledge and belief, and that I understand
14 it is made for use as evidence before the Idaho Public
15 Utilities Commission and is subject to penalty for perjury.
16 SIGNED this 31st day of May 2024, at Boise, Idaho.
17 7�� ��_
18 Signed:
19 Timothy E . Tatum
20
21
22
23
24
TATUM, DI 35
Idaho Power Company

BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION
CASE NO. IPC-E-24-07
IDAHO POWER COMPANY
TATUM , DI
TESTIMONY
EXHIBIT NO. 1

Idaho Power Capital Expenditures Forecast(1)
2024 - 2028
$1,000
$900
0
$800
$700
$600
$500
$400
$300
$200
$100
$0
2024 2025 2026 2027 2028
* Distribution ($130-$175M) u Hydro ($80-$150M) o Transmission ($140-$250M)
o General Plant ($60-$75M) a Thermal ($10-$50M) o High Voltage Transmission ($140-$230M)
■ New capacity resources ($20-$200M)
ail As of February 15,2024.This graphic is a representation of the 5-year capital expenditures forecast.Seepage 55 of IDACORP's 2023 Form 10-K for a summary of project types included in the 5-year forecast.
Exhibit No. 1
Case No. IPC-E-24-07
T.Tatum, IPC
Page 1 of 1

BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION
CASE NO. IPC-E-24-07
IDAHO POWER COMPANY
TATUM , DI
TESTIMONY
EXHIBIT NO. 2

MOODY'S
Rating Action: Moody's changes IDACORP and Idaho Power outlooks to negative; affirms ratings
07 Mar 2024
Approximately$2.8 billion of debt instruments affected
New York, March 07,2024—Moody's Ratings(Moody's)today changed the outlooks of IDACORP, Inc. (IDACORP)
and Idaho Power Company(IPC or Idaho Power)to negative from stable. At the same time, Moody's affirmed
IDACORP's ratings, including its Baa2 long-term Issuer rating and P-2 short-term commercial paper rating,and IPC's
ratings, including its Baal Issuer rating and P-2 short-term commercial paper rating. A complete list of rating actions is
provided towards the end of this press release.
RATINGS RATIONALE
"Idaho Power Company's financial profile is being pressured by a combination of higher capex and slow cash flow
growth,"stated Edna Marinelarena,Assistant Vice President.The utility's ratio of cash flow from operations before
changes in working capital (CFO pre-WC)to debt has been around 12%over the last several years as a result of
increased debt funded capital investments,already weak for its Baal rating. Moody's projects the ratio could be
sustained at about 12%over the next two years due to an increase in capital spending.Although IPC's first rate case
in over 10 years resulted in a constructive outcome,the new rate structure is insufficient to support a near-term
improvement in credit metrics.
IDACORP's Baa2 Issuer rating is underpinned by IPC's cash flow and credit quality, but also reflects structural
subordination of the parent company's obligations to its utility's debt service. Since roughly 90%of IDACORP's cash
flow is generated by IPC,any negative rating or outlook action on IPC directly impacts IDACORP's ratings or outlook
as well.
Idaho Power's Baal Issuer rating reflects its strong residential and industrial customer growth and a constructive
regulatory environment in Idaho,where roughly 95%of the utility's revenue is derived.The rating is constrained by the
significant regulatory lag associated with its growing capex over the next several years because IPC lacks the type of
timely and automatic investment and operating cost recovery mechanisms seen in other states, resulting in a financial
profile that has historically been weaker than that of most peers.
Moody's has historically noted the utility's flowthrough tax and long-lived depreciation as contributing factors to this
underperformance.The company carries a substantial$770.5 million of regulatory assets on its balance sheet, net of
regulatory liabilities,as of year-end 31 December 2023. Some of the most sizeable unrecovered asset balances are
associated with IPC's Hells Canyon Complex hydro-fueled electric generation facility,the relicensing of which has
Exhibit No.2
Case No. IPC-E-24-07
T.Tatum, IPC
Page 1 of 9

been repeatedly delayed in a lengthy permitting and approval process since originally filed in 2003.
Regulatory approval of deferrals are a constructive rate making provision, however,deferrals are also a near-term
drag on credit metrics and increase regulatory lag.The company has plans to file additional general rate cases,which
is a credit positive. Nevertheless,without the benefit from more incremental and timelier rate relief through riders,
quicker asset recovery via depreciation rates or more frequent base rate increases, IPC's credit metrics will no longer
be sustained at levels supportive of the Baal rating.
Furthermore, IPC will double its capital spending plan to roughly$800 million annually on average from about$600
million in 2023 and$430 million in 2022.The company's spend now totals between$3.8 billion and$4.4 billion from
2024 through 2028. Moody's estimates that IPC will generate about$520 million in cash flow from operations in 2024
and pay about$100 million in dividends, resulting in negative free cash flow of about$380 million for 2024.
In comparison, IDACORP has plans to draw about$300 million on its November 2023 forward equity issuance to
support IPC's capital investments,which may not be sufficient to maintain the organization's current credit profile. The
negative outlook reflects the rapidly deteriorating free cash flow position over the next several years as a result of IPC's
increased capex program.Although the utility plans to maintain its capital structure at about 50%debt and 50%equity,
cash flow recovery will continue to lag the increase in debt.
IPC's weak credit metrics are further pressured by wildfire risk in its service territory,which Moody's views as moderate
due to the company's mitigation plans that will also require material capital spending. IPC has a total of 34,476 miles of
transmission and distribution lines across Idaho and Oregon most of which is exposed to wildfires to some degree.
The utility breaks down its risk profile by tiers:Tier 2(elevated risk)or Tier 3(high risk). Based on the utility's reported
risk profile, about 8%of total system miles are within these high wildfire risk areas, largely Tier 2 at 5%with about 3%
in Tier 3;with the risk profile being the highest in Idaho.
IPC implemented a Wildfire Mitigation Plan in 2021 focused on situational awareness,field personnel safety practices
and operational wildfire mitigation strategies to prevent the accidental ignition of wildfires.The utility has also managed
its wildfire risk through traditional vegetation management and pole replacement strategies.The plan,which is
updated annually,also includes a Public Safety Power Shutoff Plan (PSPS),which is consistent with best practices of
the utilities in California and could be used in times when there is extreme wildfire risk.
Outlook
The negative outlook for Idaho Power reflects its persistently weak credit metrics that,despite a constructive rate case
outcome,are less likely to improve due to increased capex,the lack of cost recovery mechanism to expedite cash flo
recovery and limited equity issuance to offset higher debt levels.
The negative outlook for IDACORP reflects the outlook for IPC, its primary subsidiary.
FACTORS THAT COULD LEAD TO AN UPGRADE OR DOWNGRADE OF THE RATINGS
Factors that could lead to an upgrade
Exhibit No.2
Case No. IPC-E-24-07
T.Tatum, IPC
Page 2 of 9

The rating of IPC could be upgraded if key credit metrics improve significantly such that its CFO pre-WC to debt ratio
increase above 16%on a sustained basis.An upgrade could also occur if the utility's regulatory construct improves
materially, including authorization of cost recovery mechanisms that could result in faster cash flow recovery, reducing
regulatory lag and limiting the reliance on debt leverage.
IDA's rating would likely be upgraded with an upgrade of IPC's rating.
Factors that could lead to a downgrade
IDACORP and IPC's ratings could be downgraded if capital expenditures remain elevated, negative free cash flow
continues to grow,there are adverse regulatory developments affecting cost recovery,or its financial metrics including
its CFO pre-WC to debt ratio remains below 13%.
IDACORP, Inc. is a holding company whose principal operating subsidiary is Idaho Power Company, a fully integrated
regulated electric utility. IPC's service territory encompasses southern Idaho(approximately 95%of IPC's rate base)
and eastern Oregon. IPC is subject to the purview of the Idaho Public Utilities Commission (IPUC)and the Public
Utility Commission of Oregon(OPUC),while the Federal Energy Regulatory Commission (FERC)regulates its
transmission operations.
IDACORP's other notable subsidiaries include IDACORP Financial Services, Inc., an investor in affordable housing
and other real estate tax credit investments, and Ida-West Energy Company, an operator of small hydropower
generation projects that satisfy the requirements of the Public Utility Regulatory Policies act of 1978.
LIST OF AFFECTED RATINGS
..Issuer: IDACORP, Inc.
.... Issuer Rating,Affirmed Baa2
....Senior Unsecured Shelf,Affirmed (P)Baa2
....Commercial Paper,Affirmed P-2
Outlook Actions:
....Outlook, Changed to Negative from Stable
..Issuer: Idaho Power Company
Affirmations:
.... Issuer Rating,Affirmed Baal
.... Commercial Paper,Affirmed P-2
Exhibit No.2
Case No. IPC-E-24-07
T.Tatum, IPC
Page 3 of 9

....Senior Secured Shelf,Affirmed (P)A2
....Senior Unsecured Shelf,Affirmed (P)Baal
....Senior Secured First Mortgage Bonds,Affirmed A2
....Backed Senior Secured First Mortgage Bonds,Affirmed A2
....Underlying Senior Secured First Mortgage Bonds,Affirmed A2
....Senior Secured Medium-Term Note Program,Affirmed (P)A2
Outlook Actions:
....Outlook, Changed to Negative from Stable
..Issuer:American Falls Reservoir District, ID
Affirmations:
....Backed Senior Unsecured Revenue Bonds ,Affirmed Baal
....Backed Senior Unsecured Revenue Bonds,Affirmed VMIG 2
..Issuer: Humboldt(County of)NV
Affirmations:
....Senior Secured Revenue Bonds,Affirmed A2
....Backed Senior Secured Revenue Bonds,Affirmed A2
..Issuer: SWEETWATER(COUNTY OF)WY
Affirmations:
....Senior Secured Revenue Bonds,Affirmed A2
....Backed Senior Secured Revenue Bonds,Affirmed A2
The principal methodology used in these ratings was Regulated Electric and Gas Utilities published in June 2017 and
available at https://ratings.moodys.com/rmc-documents/68547.Alternatively, please see the Rating Methodologies
page on https://ratings.moodys.com for a copy of this methodology.
REGULATORY DISCLOSURES
For further specification of Moody's key rating assumptions and sensitivity analysis, see the sections Methodology
Exhibit No.2
Case No. IPC-E-24-07
T.Tatum, IPC
Page 4 of 9

Assumptions and Sensitivity to Assumptions in the disclosure form. Moody's Rating Symbols and Definitions can be
found on https://ratings.moodys.com/rating-definitions.
For ratings issued on a program,series,category/class of debt or security this announcement provides certain
regulatory disclosures in relation to each rating of a subsequently issued bond or note of the same series,
category/class of debt,security or pursuant to a program for which the ratings are derived exclusively from existing
ratings in accordance with Moody's rating practices. For ratings issued on a support provider,this announcement
provides certain regulatory disclosures in relation to the credit rating action on the support provider and in relation to
each particular credit rating action for securities that derive their credit ratings from the support provider's credit rating.
For provisional ratings,this announcement provides certain regulatory disclosures in relation to the provisional rating
assigned,and in relation to a definitive rating that may be assigned subsequent to the final issuance of the debt, in
each case where the transaction structure and terms have not changed prior to the assignment of the definitive rating
in a manner that would have affected the rating. For further information please see the issuer/deal page for the
respective issuer on https:Hratings.moodys.com.
For any affected securities or rated entities receiving direct credit support from the primary entity(ies)of this credit rating
action, and whose ratings may change as a result of this credit rating action,the associated regulatory disclosures will
be those of the guarantor entity. Exceptions to this approach exist for the following disclosures, if applicable to
jurisdiction:Ancillary Services, Disclosure to rated entity, Disclosure from rated entity.
The ratings have been disclosed to the rated entity or its designated agent(s)and issued with no amendment resulting
from that disclosure.
These ratings are solicited. Please refer to Moody's Policy for Designating and Assigning Unsolicited Credit Ratings
available on its website https:Hratings.moodys.com.
Regulatory disclosures contained in this press release apply to the credit rating and, if applicable,the related rating
outlook or rating review.
The Global Scale Credit Rating(s)discussed in this Credit Rating Announcement was(were)issued by one of Moody'
affiliates outside the EU and UK and is(are)endorsed for use in the EU and UK in accordance with the EU and UK
CRA Regulation.
Please see https://ratings.moodys.com for any updates on changes to the lead rating analyst and to the Moody's legal
entity that has issued the rating.
Please see the issuer/deal page on https://ratngs.moodys.com for additional regulatory disclosures for each credit
rating.
Edna Marinelarena
Asst Vice President-Analyst
Project&Infra Finance Group
Moody's Investors Service, Inc.
Exhibit No.2
Case No. IPC-E-24-07
T.Tatum, IPC
Page 5 of 9

250 Greenwich Street
New York, NY 10007
U.S.A.
JOURNALISTS: 1 212 553 0376
Client Service: 1 212 553 1653
Michael G. Haggarty
Associate Managing Director
Project&Infra Finance Group
JOURNALISTS: 1 212 553 0376
Client Service: 1 212 553 1653
Releasing Office:
Moody's Investors Service, Inc.
250 Greenwich Street
New York, NY 10007
U.S.A.
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Case No. IPC-E-24-07
T.Tatum, IPC
Page 6 of 9

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Case No. IPC-E-24-07
T.Tatum, IPC
Page 7 of 9

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T.Tatum, IPC
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Exhibit No.2
Case No. IPC-E-24-07
T.Tatum, IPC
Page 9 of 9

BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION
CASE NO. IPC-E-24-07
IDAHO POWER COMPANY
TATUM , DI
TESTIMONY
EXHIBIT NO. 3

S&P Global
Ratings Research
Research Update:
IDACORP Inc, Idaho Power Co Liquidity Assessments
Revised To Adequate; ' BBB' Long- And 'A-2'
Short-Term Rtgs Affi rmed
February 7,2023
Rating Action Overview
PRIMARY CREDIT ANALYST
- IDACORP Inc. has increased its consolidated capital spending plan,resulting in tightened Beverly R Gantt
liquidity atthe company and its subsidiary,Idaho Power Co.,overthe forecast period. New York
- Therefore,we revised downward our assessment of IDACORP and Idaho Power's liquidityto [phone]
beverly.gntt
adequate from strong.This downward reassessment is neutral for the rating. @spgLobat.com
- We affirmed the ratings on IDACORP and Idaho Power,includingthe'BBB'issuer credit rating SECONDARY CONTACT
and the'A-2'short-term credit rating. Matthew LO'NeiR
- The stable outlook reflects our expectation that IDACORP will maintain funds from operations New York
(FFO)to debt of 16%-18%over the outlook period,will fund its elevated capital spending in a [phone]
credit-supportive manner,and will continue to effectively manage its regulatory relationships. matthew.oneill
@spglobal.com
Rating Action Rationale
We revised downward our assessment of IDACORP's and Idaho Power's liquidity to adequate
from strong,reflecting elevated capital spending that will result in a modest weakening of the
companies'liquidity throughout the forecast period. IDACORP expects 2023 consolidated
capital expenditures of about$700 million, materially higher than our prior expectations of about
$450 million.The company plans to invest in projects to harden its system;enhance safety and
reliability;and meet future expected electricity demands of new and existing customers,which the
company forecasts will largely be driven by an increase in demand from commercial and industrial
customers.The company also expects to invest in upgrades and maintenance to existing
hydropower and thermal generation facilities.
Because of the higher capital spending,we no longer expect that IDACORP and Idaho Power will
meet our previous assessment of strong liquidity,which requires sources over uses to be more
than 1.5x for the next 12 months and to remain above 1 x for the subsequent 12 months.We expect
that IDACORP and Idaho Power will consistently meet our assessment for adequate liquidity,
S&P GLOBAL RATINGS360 February 7,2023 1
@ S&P Global Ratings.All rights reserved.No reprint or dissemination without S&P Global Ratings'permission.See Terms of Exhibit No.3
Use/Disclaimer on the last page. Case No.IPC T.Tattumum,,IP 7
C
Page 1 of 8

Research Update:IDACORP Inc,Idaho Power Co Liquidity Assessments Revised To Adequate;'BBB'Long-And'A-2'Short-Term Rtgs Affirmed
which has the lower threshold of sources over uses of more than 1.1 x over the next 12 months.
We continue to assess IDACORP's business risk as strong. Our assessment of I DACORP's
business risk reflects its lower-risk and regulated vertically integrated electric utility operations,
which provide essential services to a midsize customer base of about 604,000 customers,
primarily in Idaho. IDACORP's operations benefit from stable and transparent regulatory
environments in Idaho and Oregon,which allow for constructive regulatory mechanisms that
support cash flow. In addition,the company's wholesale energy operations are regulated by the
Federal Energy Regulatory Commission(FERC),which we assess as supportive of credit quality
because the company benefits from above-average return on equity using formulaic rates.
Offsetting our view of IDACORP's business risk is its limited geographic and regulatory diversity.
However,the company's service territory has a favorable customer growth rate that supports its
business risk profile. Furthermore,our assessment includes the company's heavy reliance on
hydropower generation and purchased power. Low-cost hydropower provides more than 50%of
the company's generation under normal water-level conditions,leading to lower electricity rates.
However,when hydroelectric generation is low,the company relies on more expensive purchased
power,which exposes the company to the volatile spot power market. In addition,the company
has some exposure to coal operations; however, it expects to end its coal operations by 2028.This
includes ending operations at its Jim Bridger operating plant in Wyoming by 2028 and converting
two of the four units to natural gas by 2024.
We assess IDACORP's financial measures using our medial volatility table,which reflects the
company's rate-regulated utility operations,stable cash flow,and effective management of
regulatory risk. Under our base-case scenario,we expect FFO to debt in the 16%-18%range in
2023 and 2024 given its continued cost recovery mechanisms and customer growth.Our base case
also incorporates elevated capital spending. Furthermore,given annual common stock dividends
of about$160 million to$170 million annually for 2023 and 2024,we expect annual negative
discretionary cash flows of about$325 million in 2023.Strategically,we expect that the company
will fund this deficit in a credit-supportive manner and in-line with its regulatory-approved capital
structure.
Outlook
The stable outlook on IDACORP reflects our expectation it will generate sufficient operating cash
flows to support consolidated financial measures that are adequate for the current rating. It also
incorporates the company's ability to internally fund a significant portion of its capital spending,
as well as its adequate management of its regulatory relationships.Our base-case forecast
assumes FFO to debt between 16%and 18%for the next two years.
Downside scenario
We could lower our ratings on IDACORP if its business risk increases because of the unsupported
recovery of operating expenses,including a higher-than-average reliance on purchased power or
unsupported capital investments through the regulatory process,or it materially expands its
nonregulated segments,which currently account for a negligible portion of its business.We could
also lower our ratings if the company's financial measures consistently underperform our
base-case assumptions,leading it to sustain FFO to debt of consistently below 14%.
S&P GLOBAL RATINGS360 February 7,2023 2
©S&P Global Ratings.All rights reserved.No reprint or dissemination without S&P Global Ratings'permission.See Terms of Exhibit No.3
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C
Page 2 of 8

Research Update:IDACORP Inc,Idaho Power Co Liquidity Assessments Revised To Adequate;'BBB'Long-And'A-2'Short-Term Rtgs Affirmed
Upside scenario
We could raise our ratings on IDACORP if it strengthens its business risk profile through more
robust management of its regulatory relationships,improving operating efficiency combined with
stronger cash flow measures,including FFO to debt consistently exceeding 20%.
Company Description
IDACORP is a holding company that owns Idaho Power Co.,a vertically integrated electric utility in
Idaho and Oregon that contributes to about 99%of IDACORP's consolidated revenue.About 95%
of Idaho Power's general business revenue stems from customers located in Idaho,with the
remainder from Oregon.
Our Base-Case Scenario
Ongoing customer growth and the use of regulatory mechanisms,such as the power cost
adjustment(PCA)and fixed-cost adjustment(FCA),support profitability;
Negative discretionary cash flow;
Elevated capital spending over the forecast period;
- Annual dividends of about$160 million to$170 million through 2024;and
- All debt maturities are refinanced.
Liquidity
The short-term rating on IDACORP is'A-2',based on the issuer credit rating on the company.We
assess IDACORP's stand-alone liquidity as adequate because we believe its liquidity sources will
likely cover its uses by more than 1.1 x over the next 12 months and meet cash outflows even if
EBITDA declines 10%.We believe the company's predictable regulatory framework provides
manageable cash flow stability for the company even in times of economic stress.In addition,
IDACORP has the abilityto absorb high-impact,low-probability events with limited need for
refinancing.This reflects the company's access to a combined$400 million credit facility,about
$375 million of which is available as of September 2022,expiring in December 2025,as well as our
belief the company can significantly scale back its high capital spending projects during stressful
periods,indicative of a limited need for refinancing under such conditions.Also supporting our
view is the company's lack of significant near-term debt maturities in the coming years.
Furthermore,the assessment also reflects the company's prudent risk management,solid
relationships with banks(which includes more than seven well-established banks),and a
generally high standing in credit markets.Overall,we believe the company should be able to
withstand adverse market circumstances during the next 12 months with sufficient liquidity to
meet its obligations.
Principal liquidity sources
- Estimated cash FFO of about$520 million;
- Cash and liquid investments of about$226 million as of Sept.30,2022;and
S&P GLOBAL RATINGS360 February 7,2023 3
©S&P Global Ratings.All rights reserved.No reprint or dissemination without S&P Global Ratings'permission.See Terms of Exhibit No.3
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C
Page 3 of 8

Research Update:IDACORP Inc,Idaho Power Co Liquidity Assessments Revised To Adequate;'BBB'Long-And'A-2'Short-Term Rtgs Affirmed
- Available credit facility of approximately$375 million as of Sept.30, 2022.
Principal liquidity uses
- Capital spending of about$620 million;
- Debt maturities of about$79 million over the next twelve months;and
- Dividends of about$160 million.
Covenants
Compliance expectations
As of Sept.30,2022, IDACORP and Idaho Power were in compliance with the financial covenants of
its credit facilities and has sufficient cushion.Under our base-case scenario,we expect IDACORP
and Idaho Power will remain in compliance with these covenants,especially given the stability of
the regulated utility operations.
Requirements
IDACORP's and Idaho Power's consolidated total debt to consolidated total capitalization ratio
may not be greater than 65%at the end of each quarter.As of Sept.30,2022,the leverage ratios
were 44%and 46%for IDACORP and Idaho Power,respectively,indicative of adequate cushion.
Issue Ratings - Subordination Risk Analysis
Analytical conclusions
- We base the'A-2'short-term ratings on IDACORP and its subsidiary, Idaho Power,on the issuer
credit rating on the companies.
Ratings Score Snapshot
IDACORP Inc.
Issuer credit rating: BBB/Stable/A-2
Business risk:Strong
- Country risk:Very low
- Industry risk:Very low
- Competitive position:Satisfactory
S&P GLOBAL RATINGS360 February 7,2023 4
©S&P Global Ratings.All rights reserved.No reprint or dissemination without S&P Global Ratings'permission.See Terms of Exhibit No.3
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C
Page 4 of 8

Research Update:IDACORP Inc,Idaho Power Co Liquidity Assessments Revised To Adequate;'BBB'Long-And'A-2'Short-Term Rtgs Affirmed
Financial risk:Significant
- Cash flow/leverage:Significant
Anchor: bbb
Modifiers
- Diversification/portfolio effect: Neutral(no impact)
- Capital structure: Neutral(no impact)
- Financial policy: Neutral(no impact)
- Liquidity:Adequate(no impact)
- Management and governance:Satisfactory(no impact)
- Comparable rating analysis: Neutral(no impact)
Stand-alone credit profile:bbb
- Group credit profile: bbb
- Entity status within group: Parent
ESG credit indicators: E-3, S-3, G-2
Idaho Power Co.
Issuer credit rating: BBB/Stable/A-2
Business risk:Strong
- Country risk:Very low
- Industry risk:Very low
- Competitive position:Satisfactory
Financial risk:Significant
- Cash flow/leverage:Significant
Anchor: bbb
Modifiers
- Diversification/portfolio effect: Neutral(no impact)
- Capital structure: Neutral(no impact)
- Financial policy: Neutral(no impact)
- Liquidity:Adequate(no impact)
- Management and governance:Satisfactory(no impact)
- Comparable rating analysis: Neutral(no impact)
Stand-alone credit profile:bbb
S&P GLOBAL RATINGS360 February 7,2023 5
©S&P Global Ratings.All rights reserved.No reprint or dissemination without S&P Global Ratings'permission.See Terms of Exhibit No.3
Use/Disclaimer on the last page. Case No.IPC T.Tattumum,,IP7
C
Page 5 of 8

Research Update:IDACORP Inc,Idaho Power Co Liquidity Assessments Revised To Adequate;'BBB'Long-And'A-2'Short-Term Rtgs Affirmed
- Group credit profile: bbb
- Entity status within group:Core(no impact)
ESG credit indicators: E-3, S-3, G-2
Related Criteria
- General Criteria: Environmental,Social,And Governance Principles In Credit Ratings,Oct. 10,
2021
- General Criteria:Group Rating Methodology,July 1, 2019
- Criteria I Corporates I General:Corporate Methodology: Ratios And Adjustments,April 1, 2019
- General Criteria: Methodology For Linking Long-Term And Short-Term Ratings,April 7, 2017
- Criteria I Corporates I General: Methodology And Assumptions: Liquidity Descriptors For Global
Corporate Issuers,Dec. 16,2014
- General Criteria: Methodology: Industry Risk, Nov. 19, 2013
- General Criteria:Country Risk Assessment Methodology And Assumptions, Nov. 19, 2013
- Criteria I Corporates I General:Corporate Methodology, Nov. 19, 2013
- General Criteria: Methodology: Management And Governance Credit Factors For Corporate
Entities, Nov. 13,2012
- General Criteria: Principles Of Credit Ratings, Feb. 16,2011
Ratings List
Ratings Affirmed
IDACORP Inc.
Idaho Power Co.
Issuer Credit Rating BBB/Stable/A-2
Issue-Level Ratings Affirmed
IDACORP Inc.
Commercial Paper A-2
Idaho Power Co.
Senior Secured A-
Commercial Paper A-2
Issue-Level Ratings Affirmed;Recovery Ratings Unchanged
Idaho Power Co.
Senior Secured A-
Recovery Rating 1+
S&P GLOBAL RATINGS360 February 7,2023 6
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C
Page 6 of 8

Research Update:IDACORP Inc,Idaho Power Co Liquidity Assessments Revised To Adequate;'BBB'Long-And'A-2'Short-Term Rtgs Affirmed
Certain terms used in this report,particularly certain adjectives used to express our view on rating relevant factors,
have specific meanings ascribed to them in our criteria,and should therefore be read in conjunction with such
criteria.Please see Ratings Criteria at www.standardandpoors.com for further information.Complete ratings
information is available to subscribers of Ratings Direct at www.capitaliq.com.All ratings affected by this rating
action can be found on S&P Global Ratings'public website at www.standardandpoors.com.Use the Ratings search
box located in the left column.
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C
Page 7 of 8

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Exhibit No.3
Case No.IPC-E-24-07
T.Tatum,IPC
Page 8 of 8

BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION
CASE NO. IPC-E-24-07
IDAHO POWER COMPANY
TATUM , DI
TESTIMONY
EXHIBIT NO. 4

IDAHO POWER COMPANY
BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
REVENUE ALLOCATION SUMMARY
TWELVE MONTHS ENDING DECEMBER 31,2024
FINAL REVENUE ALLOCATION
REVENUE ALLOCATION SUMMARY
$in 000's,except mills per kWh
Column (A) (B) (C) (D) (E) (F) (G) (H) (1) (J) (K) (L) (M) (N) (0) (P) (Q)
Class Cost-of-Service Revenue Allocation Cap and Spread
Rate 2024 Sales 2024 First Pass Revenue Allocation Second Pass Revenue Allocation Final Revenue Allocation
Schedule Normalized Retail Revenue Revenue Percent Average Over Below Revenue Shortfall Allocation Average COS
Row Tariff Description Number (MWh) Sales Change Allocation Change Mills/kWh Cap Floor Change Y( /N) % $ $ Mills/kWh Index %
(1) Uniform Tariff Schedules
(2) Residential Service Sch 1 5,602,442 $ 611,842 $ 43,591 $ 655,433 7.12% 116.99
(3) Residential Service On-Site Gen Sch 6 162,496 17,970 1,514 19,485 8.43% 119.91
(4) Total Residential Service 5,764,938 $ 629,812 $ 45,106 $ 674,918 7.16% 117.07 $ - $ - $ 45,106 Y 52.9% $ 568 $ 45,673 117.17 100% 7.25%
(5) Small General Service Sch 7 137,888 $ 18,651 $ 1,341 $ 19,991 7.19% 144.98
(6) Small General Service On-Site Gen Sch 8 461 62 9 71 13.96% 153.19
(7) Total Small General Service 138,349 $ 18,713 $ 1,349 $ 20,062 7.21% 145.01 $ - $ - $ 1,349 Y 1.6% $ 17 $ 1,366 145.13 100% 7.30%
(8) Large General Service Sch 9-S 3,299,187 $ 273,615 $ 18,528 $ 292,143 6.77% 88.55 - - 18,528 Y 23.0% 247 18,775 88.62 100% 6.86%
(9) Large General Service Sch 9-P/T 640,258 46,878 3,118 49,997 6.65% 78.09 - - 3,118 Y 3.9% 42 3,161 78.15 100% 6.74%
(10) Area Lighting Sch 15 2,615 1,327 1 1,328 0.06% 507.77 - 48 48 N 48 525.99 104% 3.65%
(11) Large Power Service Sch 19-S/P/T 2,343,074 156,418 10,967 167,386 7.01% 71.44 - - 10,967 Y 13.1% 141 11,108 71.50 100% 7.10%
(12) Irrigation Service Sch 24-S 1,829,052 166,865 16,967 183,832 10.17% 100.51 1,117 - 15,850 N 15,850 99.90 99% 9.50%
(13) Non-Metered General Service Sch 40 14,381 1,350 99 1,450 7.37% 100.82 - - 99 Y 0.1% 1 101 100.90 100% 7.46%
(14) Municipal Street Lighting Sch 41 20,671 3,661 215 3,876 5.87% 187.49 - - 215 Y 0.3% 3 218 187.65 100% 5.96%
(15) Traffic Control Lighting Sch 42 2,983 219 25 244 11.18% 81.67 4 - 21 N 21 80.44 98% 9.50%
...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
(16) Total Idaho Rates 14,055,509 $ 1,298,859 $ 96,375 $ 1,395,234 7.42% 99.27 $ 1,121 $ 48 $ 95,302 $ 1,019 $ 96,321 99.26 100% 7.42%
..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Special Contracts
(17) Micron Sch 26 544,050 $ 34,880 $ 1,897 $ 36,776 5.44% 67.60 $ $ - $ 1,897 Y 2.9% $ 31 $ 1,928 67.66 100% 5.53%
(18) Simplot Sch 29 175,000 10,130 454 10,585 4.49% 60.48 - 454 Y 0.9% 9 464 60.54 100% 4.58%
(19) DOE/INL Sch 30 258,000 15,103 567 15,670 3.75% 60.74 - 567 Y 1.27% 14 581 60.79 100% 3.84%
...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................:
(20) Total Special Contract 977,050 $ 60,113 $ 2,918 $ 63,032 4.85% 64.51 $ - $ - $ 2,918 $ 54 $ 2,972 64.57 100% 4.94%
...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
(21) Total Idaho Retail Sales 15,032,560 $ 1,358,973 $ 99,293 $ 1,458,266 7.31% 97.01 $ 1,121 $ 48 $ 98,220 $ 1,073 $ 99,293 97.01 100% 7.31%
.........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................7...............
First Pass Shortfall: $ 1,073
Cap: 130% 9.50%
Floor: 50% 3.65%
Exhibit No.4
Case No. IPC-E-24-07
T.Tatum, IPC
Page 1 of 1

BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF THE APPLICATION )
OF IDAHO POWER COMPANY FOR ) CASE NO. IPC-E-24-07
AUTHORITY TO INCREASE RATES FOR )
ELECTRIC SERVICE TO RECOVER )
COSTS ASSOCIATED WITH )
INCREMENTAL CAPITAL INVESTMENTS )
AND CERTAIN ONGOING OPERATIONS )
AND MAINTENANCE EXPENSES . )
IDAHO POWER COMPANY
DIRECT TESTIMONY
OF
MATTHEW T . LARKIN

1 Q. Please state your name, business address, and
2 present position with Idaho Power Company ("Idaho Power" or
3 "Company") .
4 A. My name is Matthew T. Larkin. My business
5 address is 1221 West Idaho Street, Boise, Idaho 83702 . I am
6 employed by Idaho Power as the Revenue Requirement Senior
7 Manager in the Regulatory Affairs Department.
8 Q. Please describe your educational background.
9 A. I received a Bachelor of Business
10 Administration degree in Finance from the University of
11 Oregon in 2007 . In 2008, I earned a Master of Business
12 Administration degree from the University of Oregon. I have
13 also attended electric utility ratemaking courses,
14 including the Electric Rates Advanced Course, offered by
15 the Edison Electric Institute, and Estimation of
16 Electricity Marginal Costs and Application to Pricing,
17 presented by National Economic Research Associates, Inc.
18 Q. Please describe your work experience with
19 Idaho Power.
20 A. I began my employment with Idaho Power as a
21 Regulatory Analyst in January 2009 . As a Regulatory
22 Analyst, I provided support for the Company' s regulatory
23 activities, including compliance reporting, financial
24 analysis, and the development of revenue forecasts for
25 regulatory filings .
LARKIN, DI 1
Idaho Power Company

1 In January 2014, I was promoted to Senior Regulatory
2 Analyst where my responsibilities expanded to include the
3 development of complex cost-related studies and the
4 analysis of strategic regulatory issues .
5 Since becoming the Revenue Requirement Senior
6 Manager in March 2016, I have overseen the Company' s
7 regulatory activities related to revenue requirement, such
8 as power supply expense modeling, jurisdictional separation
9 studies, and Idaho Power' s Open Access Transmission Tariff
10 formula rate.
11 I . OVERVIEW
12 Q. What is the purpose of your testimony in this
13 proceeding?
14 A. The purpose of my testimony in this proceeding
15 is twofold. First, I discuss the development of the Idaho
16 Results of Operations ("ROO") discussed in the Direct
17 Testimony of Company Witness, Mr. Timothy Tatum, Vice
18 President of Regulatory Affairs . Second, I detail the
19 methodology utilized to develop the revenue increase
20 requested in this case.
21 Q. How is your testimony organized?
22 A. My testimony is divided into two sections .
23 Section II provides a detailed discussion of the
24 development of the ROO that was performed at my direction,
25 and the conclusions that can be drawn from the analysis .
LARKIN, DI 2
Idaho Power Company

1 Section III of my testimony details each component of the
2 Company' s incremental revenue request related to the update
3 of capital and labor-related operations and maintenance
4 ("O&M") expense ("O&M Labor") .
5 Q. Did you consult with Mr. Tatum regarding the
6 development of the incremental revenue request?
7 A. Yes . The methodology utilized to develop the
8 incremental revenue request as presented in my testimony is
9 a direct result of numerous discussions with Mr. Tatum. I
10 will discuss the resulting methodology in detail in Section
11 III of my testimony.
12 Q. Did Mr. Tatum direct you to exclude any 2024
13 capital projects from the Company' s request in this case?
14 A. Yes . I was directed to exclude any expected
15 2024 capital projects associated with the Jim Bridger Power
16 Plant ("Bridger") and the North Valmy Generating Station
17 ("Valmy") from the incremental 2024 revenue requirement.
18 For each of these plants, Idaho Power currently has in
19 place separate rate mechanisms that utilize balancing
20 accounts and levelized revenue collection to smooth
21 recovery over the assets' remaining lives . Because of the
22 changing nature of operations at these facilities (i .e . ,
23 changing end-of-life assumptions and/or conversion to
24 natural gas) , Idaho Power intends to make a filing before
25 the Idaho Public Utilities Commission ("Commission") in the
LARKIN, DI 3
Idaho Power Company

1 coming months to update the mechanisms for both Bridger and
2 Valmy. Consequently, the Company has excluded 2024 Bridger
3 and Valmy investments from this case.
4 II . IDAHO RESULTS OF OPERATIONS
5 Q. What is the purpose of the ROO?
6 A. As detailed in Mr. Tatum' s testimony, the
7 purpose of the ROO is to demonstrate that existing rates
8 resulting from the settlement stipulation ("2023
9 Stipulation") approved in the Company' s most recently
10 completed general rate case, Case No. IPC-E-23-11 ("2023
11 GRC") , do not result in sufficient cost recovery given
12 expectations for 2024 . The ROO demonstrates that a rate
13 adjustment is needed to appropriately capture increasing
14 costs and ensure the Company remains financially healthy
15 and able to continue providing safe, reliable electric
16 service to customers .
17 Q. Please generally describe the methodology
18 utilized to develop the ROO.
19 A. The starting point for the ROO is actual 2023
20 year-end results . The Company then applied typical
21 ratemaking adjustments, such as the normalization of
22 revenues and the removal of non-rate case items such as
23 Energy Efficiency Rider ("Rider") funded expenses and
24 revenues, to develop adjusted year-end 2023 results
25 ("Adjusted 2023 Results") . Then, to provide a consistent
LARKIN, DI 4
Idaho Power Company

1 comparison with the results of the 2023 GRC, Idaho Power
2 applied certain ratemaking adjustments as contemplated in
3 the 2023 Stipulation to align the ROO with the
4 methodological results of that case. Finally, the Company
5 layered on incremental capital and 0&M Labor expectations
6 for 2024 to determine the sufficiency of current rates .
7 Q. Are you sponsoring any exhibits to support
8 your discussion of the ROO?
9 A. Yes . I am sponsoring two exhibits related to
10 the development of the ROO. Exhibit No. 5 provides a list
11 of adjustments made at each of the three steps utilized to
12 develop the ROO: 1) Adjusted 2023 Results, 2) 2023
13 Stipulation Adjustments, and 3) 2024 Incremental
14 Adjustments . Exhibit No. 6 contains the Excel model used to
15 calculate the ROO. Please note that Exhibit No. 6 contains
16 the summary results from the jurisdictional separation
17 study ("JSS") containing the results of this analysis; the
18 complete Excel model and supporting schedules are provided
19 as a comprehensive Excel file with formulas intact with my
20 workpapers accompanying this filing.
21 Adjusted 2023 Results
22 Q. How were the Adjusted 2023 Results developed?
23 A. To develop the Adjusted 2023 Results, Idaho
24 Power applied standard ratemaking adjustments to actual
25 year-end 2023 results .
LARKIN, DI 5
Idaho Power Company

1 Q. What standard ratemaking adjustments were
2 applied to rate base?
3 A. As further detailed in Exhibit No . 5, a number
4 of adjustments were made to rate base to reflect standard
5 Idaho ratemaking treatment . These adjustments include the
6 removal of typically non-allowable items such as
7 prepayments and non-land plant held for future use . In
8 addition, rate base associated with Bridger coal-related
9 investments and Valmy investments, including associated
10 accumulated depreciation, was removed as previously
11 discussed.
12 Q. What standard ratemaking adjustments were
13 applied to operating revenues?
14 A. Retail revenues were adjusted to reflect
15 weather normalized historical sales for 2023 including an
16 adjustment for revenues subject to the Sales Based
17 Adjustment. Federal Energy Regulatory Commission ("FERC")
18 Account 447, Sales for Resale, was set at 2013 base net
19 power supply expense ("NPSE") levels, as this was the
20 amount reflected in the Company' s base rates prior to the
21 implementation of the 2023 Stipulation effective January 1,
22 2024 . Rider revenues were removed, and Account 415 revenues
23 were added. Lastly, the Bridger and Valmy levelized revenue
24 requirement amounts were removed from retail revenues to
25 align with the corresponding removal of costs .
LARKIN, DI 6
Idaho Power Company

1 Q. What standard ratemaking adjustments were
2 applied to 0&M?
3 A. Standard expense adjustments were made that
4 reflect items typically excluded from rate proceedings in
5 Idaho, including image-related advertising, certain senior
6 management expenses, and certain purchasing card
7 transactions . In accordance with the previously described
8 treatment for Bridger and Valmy, non-fuel 0&M was removed
9 for these plants . In the same manner as Account 447, NPSE
10 accounts (501, 536, 547, 555, and 565) were all set to base
11 levels embedded in rates prior to the January 1, 2024,
12 tariff update resulting from the 2023 GRC. Rider-funded
13 expenses were removed to align with the treatment of Rider
14 revenues . Power cost deferrals were removed from Account
15 557 as these are out-of-period adjustments not reflected in
16 general rate filings . 0&M payroll was annualized and short-
17 term incentive was set to target levels for components
18 previously allowed for recovery from customers .
19 Q. What standard ratemaking adjustments were
20 applied to depreciation?
21 A. Depreciation expense was annualized for 2023
22 in accordance with the Company' s prior rate case practice .
23 Depreciation expense for Bridger coal-related investments
24 and Valmy investments was removed in accordance with the
LARKIN, DI 7
Idaho Power Company

1 treatment of other revenue requirement components related
2 to these plants .
3 Q. Were the remaining components of revenue
4 requirement adjusted in accordance with the other year-end
5 2023 adjustments you just described?
6 A. Yes . The remaining components of revenue
7 requirement, including Taxes Other Than Income Taxes and
8 Current Income Taxes, were all adjusted accordingly.
9 2023 Stipulation Adjustments
10 Q. Why did Idaho Power apply 2023 Stipulation
11 adjustments to the Adjusted 2023 Results?
12 A. As discussed previously, the intent of the ROO
13 is to evaluate if revenue through existing rates is
14 sufficient when taking into account growth in capital and
15 0&M Labor relative to the stipulated results of the 2023
16 GRC. To provide a consistent comparison between the outcome
17 of the 2023 GRC and the Company' s expectation for 2024,
18 certain adjustments were necessary to reflect ratemaking
19 treatment approved in the 2023 Stipulation.
20 Q. What items were adjusted to conform with the
21 2023 Stipulation?
22 A. To align the results of the ROO with the 2023
23 Stipulation, Idaho Power adjusted amounts related to
24 wildfire mitigation ("WM") , base NPSE, pension, Board of
25 Director ("BoD") costs, and retail revenues .
LARKIN, DI 8
Idaho Power Company

1 Q. How did Idaho Power apply the WM-related
2 provisions of the 2023 Stipulation to the Adjusted 2023
3 Results?
4 A. Idaho Power currently has in place a deferral
5 related to WM. To align with the 2023 Stipulation, Idaho
6 Power added to rate base the year-end 2023 WM deferral
7 balance. Additionally, an adjustment was made to set WM 0&M
8 at the approved levels in the 2023 GRC. Lastly, the Company
9 added the level of WM amortization expense approved through
10 the 2023 Stipulation.
11 Q. How did Idaho Power adjust base NPSE to align
12 with the 2023 Stipulation?
13 A. The 2023 Stipulation contained updated base
14 NPSE amounts for Accounts 447, 501, 536, 547, 555, and 565 .
15 Idaho Power updated the Adjusted 2023 Results to reflect
16 the new stipulated level of base NPSE.
17 Q. How did Idaho Power adjust pension
18 amortization?
19 A. Idaho Power adjusted pension amortization to
20 reflect the newly approved level contained in the 2023
21 Stipulation.
22 Q. How did Idaho Power adjust O&M for BoD costs?
23 A. In the 2023 Stipulation, Idaho Power agreed to
24 remove certain BoD-related compensation and expenses . The
LARKIN, DI 9
Idaho Power Company

1 Company removed the dollar amount associated with these
2 adjustments from 0&M.
3 Q. How did Idaho Power adjust retail revenues?
4 A. Retail rates reflecting the 2023 Stipulation
5 went into effect on January 1, 2024 . To appropriately
6 reflect this change, Idaho Power applied the newly approved
7 rates to normalized 2023 billing determinants .
8 Incremental 2024 Adjustments
9 Q. Why did Idaho Power layer on incremental 2024
10 adjustments in the final step of the R00?
11 A. The purpose of the R00 is to evaluate how well
12 the Company' s existing rates from the 2023 Stipulation
13 support its financial health in light of incremental
14 changes to capital and 0&M Labor in 2024 . Therefore, once
15 the Company adjusted year-end 2023 results for standard
16 ratemaking adjustments, then further modified these results
17 to align with the ratemaking treatment contemplated in the
18 2023 Stipulation, the final step in determining the
19 sufficiency of existing rates is to layer on increased
20 costs and revenues associated with capital and 0&M Labor in
21 2024 .
22 Q. What general methodology did Idaho Power
23 utilize to determine the incremental revenue requirement
24 related to incremental 2024 capital?
LARKIN, DI 10
Idaho Power Company

1 A. At a high level, Idaho Power estimated
2 incremental plant by comparing estimated year-end 2024
3 plant balances to amounts reflected in the 2023
4 Stipulation. Incremental accumulated depreciation and
5 amortization was set using a mid-year approach, and
6 depreciation expense was calculated by determining 12
7 months of expense based on year-end 2024 plant balances . I
8 will describe in detail the derivation of incremental
9 revenue requirement associated with 2024 capital
10 expenditures later in my testimony when I discuss the
11 calculation of the incremental revenue request in Section
12 III .
13 Q. What general methodology did Idaho Power
14 utilize to determine the incremental revenue requirement
15 related to incremental 0&M Labor?
16 A. At a high level, Idaho Power calculated
17 incremental 0&M Labor by comparing expected annualized 0&M
18 labor effective year-end 2024 to amounts reflected in the
19 2023 Stipulation. I will describe in detail the derivation
20 of incremental 0&M Labor later in my testimony when I
21 discuss the calculation of the incremental revenue request
22 in Section III .
23 Q. Was an adjustment to retail revenues necessary
24 as well?
LARKIN, DI 11
Idaho Power Company

1 A. Yes . In addition to cost growth in 2024, Idaho
2 Power expects to experience growth in retail sales as well .
3 Therefore, within the ROO an adjustment was made to reflect
4 incremental revenue collection associated with capital and
5 0&M Labor due to sales growth between the 2023 Stipulation
6 results and year-end 2024 . Similar to capital and O&M
7 Labor, I will expand on my explanation of this adjustment
8 later in my testimony.
9 ROO Results
10 Q. What are the results of the ROO after applying
11 the three sets of adjustments you just described?
12 A. After adjusting for standard ratemaking
13 treatment, aligning with the results of the 2023
14 Stipulation, and applying incremental capital and O&M
15 Labor, the results of the ROO indicate existing rates fall
16 short of revenues required to maintain the financial health
17 of Idaho Power. As shown in cell H47 of the "JSS - 2024
18 Increment" tab of Exhibit No. 6, the ROO indicates an
19 expected rate of return ("ROR") of 5 . 80 percent, which
20 reflects a return on equity ("ROE") of 6 . 7 percent . These
21 values are well below the Company' s currently authorized
22 ROR of 7 .247 percent and currently authorized ROE of 9 . 6
23 percent.
24 Q. Based on these results, is it necessary to
25 increase Idaho Power' s retail rates?
LARKIN, DI 12
Idaho Power Company

1 A. Yes . The 2024 incremental revenue request,
2 which I will discuss in detail in the next section of my
3 testimony, is justified and necessary given the results of
4 the ROO. Absent a rate increase, the expected rates of
5 return are insufficient to maintain the financial health of
6 Idaho Power as it continues to make significant levels of
7 investment in the electrical grid to ensure safe, reliable
8 service to customers .
9 III . DEVELOPMENT OF INCREMENTAL REVENUE REQUIREMENT REQUEST
10 Q. Is the development of the incremental revenue
11 requirement based on the analysis performed for the ROO?
12 A. No. The intent of the ROO is different from
13 the intent of the incremental revenue requirement
14 calculation, and therefore the underlying methodologies are
15 not the same . The intent of the ROO was to evaluate the
16 sufficiency of current rates as applied to 2024
17 expectations based on year-end 2023 results, while the
18 intent of the incremental revenue requirement request is to
19 determine the amount of incremental revenue necessary to
20 account for increases to capital and 0&M Labor between the
21 results of the 2023 Stipulation and expectations for 2024 .
22 While the two analyses share some inputs, it is important
23 to recognize that the determination of the incremental
24 revenue requirement was performed as a standalone analysis .
LARKIN, DI 13
Idaho Power Company

1 Q. What was Idaho Power' s general approach to
2 developing the incremental revenue requirement in this
3 case?
4 A. As discussed in Mr. Tatum' s testimony, the
5 Company' s revenue request reflects the revenue requirement
6 associated with incremental 2024 capital and O&M Labor
7 relative to amounts approved for recovery in the 2023
8 Stipulation. To determine the rate increase requested in
9 this case, the Company computed the revenue requirement on
10 these isolated components .
11 Determination of Incremental 2024 Capital
12 Q. How did Idaho Power determine incremental 2024
13 capital?
14 A. The starting point for incremental 2024
15 capital is year-end 2023 actual plant balances . The
16 December 31, 2023, actual plant balances were adjusted to
17 remove Bridger coal-related amounts, all Valmy plant and
18 remaining plant from the Boardman power plant ("Boardman") .
19 The Company then estimated 2024 capital closings utilizing
20 the same general method applied in the 2023 GRC (i .e . , by
21 bifurcating expected plant closings into projects above and
22 below $8 million) , then applying different methodologies to
23 each category.
24 Q. How did Idaho Power determine 2024 plant
25 closings for projects greater than $8 million?
LARKIN, DI 14
Idaho Power Company

1 A. Idaho Power estimates that eight projects over
2 $8 million will close in 2024 . For each of these projects,
3 the Company began with year-end 2023 construction work-in-
4 process ("CWIP") , then developed a forecasted close amount
5 and timing by project with the respective business unit
6 managers . Each of these eight projects is discussed in
7 detail throughout the Direct Testimonies of Company
8 Witnesses Mr. Eric Hackett and Mr. Mitch Colburn.
9 Q. How did Idaho Power determine 2024 plant
10 closings for projects less than $8 million?
11 A. For projects less than $8 million, Idaho Power
12 first calculated a five-year average of the ratio between
13 the previous year' s CWIP balance and the percent of project
14 closings in the subsequent year. This ratio was then
15 applied to the year-end 2023 CWIP balance to determine
16 estimated 2024 closings . These closings were then spread to
17 FERC accounts based on a five-year history of plant
18 closings from 2019 through 2023 .
19 Q. Do Idaho Power' s estimated 2024 plant levels
20 account for retirements?
21 A. Yes . For the majority of FERC accounts, Idaho
22 Power estimated 2024 retirements using a five-year average
23 for the time period 2019 through 2023 . Accounts 302, 303,
24 391, 393, 394, 395, 397, and 398 have known retirement
LARKIN, DI 15
Idaho Power Company

1 dates and amounts based on vintage layers and therefore
2 estimates were not necessary.
3 Q. How did Idaho Power calculate accumulated
4 depreciation related to 2024 plant balances?
5 A. Accumulated depreciation was determined based
6 on a mid-year convention. The 2024 forecast was developed
7 by first determining the actual year-end 2023 balance and
8 then building upon that to determine the 2024 monthly
9 balances . The December 31, 2023, actual accumulated
10 depreciation reserve balance was adjusted to remove Bridger
11 coal-related accumulated depreciation, and all Valmy
12 accumulated depreciation. Land does not depreciate so there
13 was no adjustment for Boardman. The mid-year average was
14 determined by adding the adjusted December 2023 balance and
15 the forecasted December 2024 balance and dividing the total
16 by two .
17 Q. How did Idaho Power calculate expected
18 depreciation expense?
19 A. To determine expected depreciation expense,
20 Idaho Power applied annual depreciation rates approved in
21 Commission Order No. 35272' to expected plant balances at
22 month-end December 2024 to determine a full year of
23 depreciation expense.
1 In the Matter of Idaho Power Company's Application for Authority to
Increase its Rates Due to Revised Depreciation Rates for Electric
Plant-In-Service, Case No. IPC-E-21-18.
LARKIN, DI 16
Idaho Power Company

1 Q. How did the Company calculate incremental
2 capital utilized in the revenue requirement computation
3 once it had calculated expected 2024 values?
4 A. Once the Company determined expected 2024
5 values, an account-by-account comparison was performed
6 relative to approved capital components from the 2023
7 Stipulation. Exhibit No. 7 presents this account-by-account
8 comparison utilized to determine the incremental revenue
9 requirement components related to 2024 plant.
10 Q. What are the results of the analysis as
11 presented in Exhibit No. 7?
12 A. The analysis presented in Exhibit No . 7 shows
13 the composition of the approximately $860 million in
14 incremental 2024 plant by FERC account. Column C contains
15 plant amounts reflected in the 2023 Stipulation, while
16 Column D provides expected 2024 plant levels calculated in
17 accordance with the methodology I just described. A
18 complete Excel file containing supporting schedules with
19 formulas intact is included in my workpapers accompanying
20 this filing.
21 Determination of Incremental 2024 O&M Labor
22 Q. What components of labor are reflected in the
23 Company' s incremental revenue request?
24 A. The incremental revenue request only includes
25 0&M Labor related to wages and salaries, including
LARKIN, DI 17
Idaho Power Company

1 benefits, loadings, and short-term incentive for non-
2 officers . All other components of labor and benefits are
3 excluded from the determination of incremental labor costs
4 in this case.
5 Q. How did Idaho Power calculate expected 2024
6 0&M Labor?
7 A. Expected 2024 0&M Labor was calculated
8 utilizing the same general methodology applied in the
9 Company' s 2023 GRC. First, the Company developed a three-
10 year history of the ratio between February year-to-date 0&M
11 Labor expenses and full year 0&M Labor expenses . This ratio
12 was then applied to month-end February 2024 year-to-date
13 0&M Labor to determine the expectation of full year 2024
14 0&M Labor expenses . An annualizing adjustment was then
15 applied based on year-end 2023 levels, and a 2025 general
16 wage adjustment ("GWA") of 3 percent was added.
17 Q. How was the 2024 expectation determined for
18 short-term incentive?
19 A. In line with prior filings, Idaho Power
20 adjusted the short-term incentive to reflect target levels
21 for just the Customer Satisfaction and Reliability
22 components for non-officers .
23 Q. How did Idaho Power determine the incremental
24 labor request based on the expectation of 2024 O&M Labor?
LARKIN, DI 18
Idaho Power Company

1 A. Expected 2024 O&M Labor amounts were compared
2 to 0&M Labor reflected in the 2023 Stipulation. To isolate
3 wages and salaries, a number of adjustments were required
4 to ensure that other components of labor expense were not
5 included in the incremental revenue requirement developed
6 in this case. This includes an adjustment to remove the
7 impact of the mid-year 2022 GWA that was excluded from
8 revenue requirement as part of the 2023 Stipulation.
9 Q. Are you sponsoring an exhibit that details the
10 comparison of 2024 0&M Labor to the stipulated results of
11 the 2023 GRC?
12 A. Yes . Exhibit No. 8 steps through the
13 determination of incremental revenue requirement related to
14 2024 0&M Labor.
15 Q. What are the results of the analysis presented
16 in Exhibit No. 8?
17 A. Exhibit No. 8 details how the system
18 incremental labor in the amount of $19, 557, 535 was
19 determined. This value can be found in cell E88 of Exhibit
20 No . 8 .
21 Determination of Incremental Revenue Requirement
22 Q. Once incremental capital and O&M Labor were
23 determined, how did Idaho Power calculate the ultimate rate
24 increase requested in this case?
LARKIN, DI 19
Idaho Power Company

1 A. Once the incremental revenue requirement
2 components were determined by FERC account, Idaho Power
3 applied the jurisdictional allocation factors from the JSS
4 from the 2023 Stipulation to determine the Idaho
5 jurisdictional portion of each revenue requirement
6 component.
7 Q. Were any other adjustments required to
8 calculate the appropriate revenue increase requested in
9 this case?
10 A. Yes . Because the rate increase requested in
11 this case is intended to update the results of the 2023 GRC
12 for two specific components of revenue requirement,
13 increased revenue collection due to sales growth between
14 the 2023 Stipulation and 2024 must be considered as well,
15 serving as an offset to the increase in costs contemplated
16 in this case.
17 Q. How did Idaho Power determine the appropriate
18 level of revenue growth to apply as an offset?
19 A. Exhibit No. 9 walks through the calculation of
20 the revenue growth offset applied in this case . First,
21 Idaho Power determined an estimated cents-per-kilowatt-hour
22 ("kWh") rate of cost recovery for capital-related items and
23 0&M Labor that is currently embedded in retail rates as a
24 result of the 2023 GRC. Then, the Company determined the
25 estimated kWh sales growth between the stipulated results
LARKIN, DI 20
Idaho Power Company

1 of the 2023 GRC and 2024 . The cents-per-kWh rate was
2 applied to the kWh sales growth to determine the estimated
3 increase in recovery related to capital and O&M Labor. As
4 shown in cell A14, the revenue growth offset applied in
5 this case is $5 . 5 million.
6 Q. What is the Company' s requested rate increase
7 after taking into account incremental capital and 0&M
8 Labor, offset by incremental revenue collection?
9 A. Exhibit No. 10 details the results of the
10 incremental revenue requirement quantification. The system
11 incremental revenue requirement by FERC account is
12 presented in Column F, while the Idaho-allocated portion is
13 presented in Column G. The revenue growth offset of $5 . 5
14 million is applied in cell G45 . As shown in cell G43, the
15 Company' s requested increase in this case is $99 . 3 million,
16 or 7 . 31 percent.
17 Q. In the 2023 Stipulation, the Commission
18 authorized Idaho Power to utilize Investment Tax Credits
19 ("ITC") to offset the revenue requirement associated with
20 battery projects expected to come online in the 2023 GRC
21 test year ("2023 Battery Projects") . Is Idaho Power
22 proposing to modify that treatment in this case?
23 A. No. Embedded in Idaho Power' s existing rates
24 is a reduction equivalent to the revenue requirement of the
25 2023 Battery Projects . The incremental revenue requirement
LARKIN, DI 21
Idaho Power Company

1 calculation in this case has no impact on this existing
2 revenue requirement reduction. In other words, the proposed
3 rates effective January 1, 2025, would maintain the
4 stipulated offset to the 2023 Battery Projects revenue
5 requirement that currently exists today.
6 IV. CONCLUSION
7 Q. Please summarize your testimony.
8 A. Idaho Power performed an ROO to determine the
9 ability of existing rates to maintain the financial health
10 of the Company as it continues to make significant
11 investment in the safe, reliable operation of the
12 electrical grid. This analysis began with year-end 2023
13 results, then applied standard ratemaking adjustments,
14 changes related to the 2023 Stipulation, and expected 2024
15 costs, ultimately demonstrating that current rates are
16 insufficient to support the Company' s operations while
17 maintaining its financial health.
18 Given the results of the ROO, the Company calculated
19 an incremental rate increase based on expected capital
20 expenditures and 0&M Labor costs in 2024, updating the
21 results of the 2023 Stipulation for these two revenue
22 requirement components . The resulting analysis determined
23 that an increase to current revenues of $99 . 3 million, or
24 7 . 31 percent, is necessary to ensure timely cost recovery
LARKIN, DI 22
Idaho Power Company

1 and provide the Company with the necessary financial
2 stability.
3 Q. Would approval of the requested rate increase
4 result in fair, just, and reasonable rates?
5 A. Yes . The Company' s proposed methodology in
6 this case would provide rate relief that is commensurate
7 with the ongoing needs of the system, appropriately
8 balancing affordability with the investment required to
9 build, operate, and maintain a safe and reliable electrical
10 grid.
11 Q. Does this conclude your direct testimony in
12 this case?
13 A. Yes, it does .
14
15
16
LARKIN, DI 23
Idaho Power Company

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BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF THE APPLICATION )
OF IDAHO POWER COMPANY FOR ) CASE NO. IPC-E-24-07
AUTHORITY TO INCREASE RATES FOR )
ELECTRIC SERVICE TO RECOVER )
COSTS ASSOCIATED WITH )
INCREMENTAL CAPITAL INVESTMENTS )
AND CERTAIN ONGOING OPERATIONS )
AND MAINTENANCE EXPENSES . )
IDAHO POWER COMPANY
DIRECT TESTIMONY
OF
ERIC HACKETT

1 Q. Please state your name, business address, and
2 present position with Idaho Power Company ("Idaho Power" or
3 "Company") .
4 A. My name is Eric Hackett. My business address
5 is 1221 West Idaho Street, Boise, Idaho 83702 . I am
6 employed by Idaho Power as the Projects and Resource
7 Development Director.
8 Q. Please describe your educational background.
9 A. I graduated in 2003 from Boise State
10 University in Boise, Idaho, receiving a Bachelor of Science
11 degree in Civil Engineering. I am a registered professional
12 engineer in the state of Idaho. In 2010, I earned a Master
13 of Business Administration from Boise State University.
14 Q. Please describe your work experience with
15 Idaho Power.
16 A. From 2005 to 2007, I was employed as an
17 engineer in Idaho Power' s Transmission Engineering
18 group. In 2007, I became a Project Manager leading
19 transmission and distribution line and station
20 infrastructure projects . In 2012, I was promoted to
21 Engineering Leader where I managed the Cost and Controls
22 group supporting project management. In 2015, I changed
23 leadership roles and managed the Stations Engineering and
24 Design group as an Engineering Leader. In 2018, I was
25 promoted to Senior Manager of Projects overseeing Project
HACKETT, DI 2
Idaho Power Company

I Management and Cost and Controls, which later became
2 Manager of Projects and Design in 2021, adding Power
3 Production Design and Project Management. I was promoted to
4 my current role, Projects and Resource Development Director
5 in 2024 . In addition, I am currently leading a team of
6 internal employees and consultants in development and
7 evaluation of Idaho Power' s Request for Proposals for Peak
8 Capacity and Energy Resources .
9 Q. What is the purpose of your testimony in this
10 matter?
11 A. The purpose of my testimony is to discuss the
12 Company' s generation-related major projects, expected to be
13 complete in 2024 and included in the Company' s request in
14 this case . In my testimony I will discuss the prudent
15 nature of these investments, detailing why they are needed
16 to ensure Idaho Power' s generation fleet is robust and
17 well-positioned to provide continued safe, reliable service
18 to customers .
19 Q. How is your testimony organized?
20 A. My testimony begins with a background of the
21 Company' s generation fleet and the factors that have led to
22 additional generation-related investments required since
23 conclusion of Idaho Power' s last general rate case in 2023,
24 Case No . IPC-E-23-11 . I will then discuss the large capital
25 projects expected to be complete in 2024, detailing the
HACKETT, DI 3
Idaho Power Company

1 Company' s investment associated with the addition of
2 utility-scale battery projects and explain why Idaho
3 Power' s investment in these facilities reflects the least-
4 cost, least-risk option to ensure sufficient capacity to
5 meet customer demand in 2024 and beyond. My testimony will
6 conclude with a discussion detailing the renovation of one
7 of the Company' s aging fish hatcheries necessary for
8 licensing of one of Idaho Power' s hydro facilities to
9 ensure it is able to continue to provide safe, clean and
10 reliable energy to customers .
11 I . BACKGROUND
12 Q. Please describe Idaho Power' s current
13 generation fleet.
14 A. The backbone of Idaho Power' s current
15 generation fleet consists of the Company' s 17 hydroelectric
16 projects on the Snake River and its tributaries . Together,
17 these projects comprise the Company' s largest generation
18 source at approximately 1, 800 megawatts ("MW") of nameplate
19 capacity. Additionally, the Company is the sole owner of
20 three gas-fired generation facilities : the Danskin and
21 Bennett Mountain simple-cycle power plants located near
22 Mountain Home, Idaho, and the Langley Gulch combined-cycle
23 power plant located near New Plymouth, Idaho, which
24 collectively provide approximately 762 MW of combined
25 capacity.
HACKETT, DI 4
Idaho Power Company

1 The Company also holds a 33 percent ownership share
2 in the Jim Bridger power plant ("Bridger") , consisting of
3 two coal-fired units and two recently converted natural
4 gas-fired units which were placed in service in May 2024 .
5 Idaho Power' s share of current operations at Bridger
6 provides approximately 706 MW of combined net dependable
7 capacity. In addition, the Company has access to 134 MW of
8 net dependable capacity at the coal-fired North Valmy power
9 plant, reflecting 50 percent of the nameplate capacity at
10 Unit 2 of that facility. Recently, Idaho Power added the
11 Hemingway Battery Energy Storage System ("BESS") and the
12 Black Mesa BESS to its generation fleet which together
13 provide 120 MW of operating capacity. Lastly, the Company
14 owns and operates an 8 MW diesel facility near Salmon,
15 Idaho .
16 Q. Does Idaho Power' s request in this case
17 include any generation-related additions?
18 A. Yes . Since 2010, the Company' s actual system
19 peak has grown 1 . 5 percent per year on average, and over
20 the next five years Idaho Power is expecting to experience
21 unprecedented growth with an annual system peak increase of
22 approximately 3 . 7 percent per year, necessitating the
23 addition in 2024 of a BESS providing 60 MW of operating
24 capacity near Rogerson, Idaho and a BESS providing 36 MW of
25 operating capacity at Hemingway Station, which I will
HACKETT, DI 5
Idaho Power Company

1 discuss later in my testimony. In addition to growth, Idaho
2 Power continues to replace or refurbish existing
3 infrastructure to maintain safe, reliable operation of the
4 electrical grid, taking a proactive approach to ensuring a
5 robust and reliable generation fleet. In total, the
6 incremental generation-related investments expected to be
7 placed in service in 2024 total approximately $374 . 2
8 million and represent 43 percent of the incremental
9 investments included in the Company' s request in this case.
10 Q. How have the generation-related investments
11 grown since the completion of the last general rate case in
12 2023, Case No . IPC-E-23-11 ("2023 GRC") ?
13 A. Of the $860 million in infrastructure placed
14 in service over this period, the $374 . 2 million reflects
15 growth of 20 . 4 percent in generation-related investments in
16 the Company' s system since the Company' s 2023 GRC.
17 Q. Does the Company have a general procurement
18 policy for which it follows to ensure that all investments
19 Idaho Power makes are the procured in a least cost, least
20 risk manner?
21 A. Yes . The Company has a Procurement Policy and
22 Procurement Standard in place to provide guidance for
23 procurement activities, including competitive bidding
24 practices as well as for the purchase of many minor and
25 ancillary materials and services, and to help ensure that
HACKETT, DI 6
Idaho Power Company

1 procurement decisions are made based on the best overall
2 value to Idaho Power and its customers . In addition, many
3 goods are stock items in Idaho Power warehouses and are not
4 bid through a Request for Proposal ("RFP") on a project
5 basis, but rather as wholesale purchases . The Company' s
6 efforts ensure all projects are completed in a least-cost,
7 least-risk manner, including all generation-related
8 investments as well as the transmission and distribution-
9 related investments Mr. Colburn discusses in his testimony.
10 II . 2024 BATTERIES
11 Q. What drove the need for the addition of the
12 utility-scale battery projects for which the Company is
13 seeking a prudence determination in this case?
14 A. As mentioned earlier in my testimony, Idaho
15 Power has experienced and expects sustained load growth
16 thereby requiring the addition of new dispatchable
17 resources to meet system needs . As a result of this growth,
18 as well as limited third-party transmission capacity and a
19 decline in the peak serving effectiveness of certain
20 supply-side and demand-side resources, Idaho Power rapidly
21 moved to a near-term capacity deficiency identifying a
22 near-term capacity deficit in summer 2024 . To meet its
23 obligation to reliably serve customer load and fill the
24 2024 capacity deficiency, as soon as practicable, the
25 Company commenced a competitive solicitation with the
HACKETT, DI 7
Idaho Power Company

1 issuance of an RFP, seeking to acquire energy and capacity
2 to help meet Idaho Power' s previously identified capacity
3 needs of 85 MW to be online by June of 2024 and an
4 incremental 115 MW in 2025 ("2022 RFP") . This robust
5 competitive bidding process resulted in the procurement of
6 a 100 MW solar photovoltaic ("PV") plus 60 MW energy
7 storage project, consisting of a 25-year Power Purchase
8 Agreement ("PPA") for a 100 MW solar PV facility that
9 supplies energy to the Company' s system combined with an
10 Idaho Power-owned BESS providing 60 MW of operating
11 capacity ("Franklin BESS") . In addition, Idaho Power
12 procured a second BESS providing 36 MW of operating
13 capacity at the Hemingway station ("Hemingway BESS") . The
14 combined projects were necessary to adequately address 2024
15 capacity deficits .
16 Q. Did the Company file a request for a
17 Certificate of Public Convenience and Necessity ("CPCN")
18 for the 2024 BESS procurements?
19 A. Yes . Idaho Power' s request for a CPCN
20 associated with the Franklin BESS and the Hemingway BESS
21 for a total of 96 MW of operating capacity was presented in
22 two separate proceedings : (1) Case No. IPC-E-23-05 included
23 the request for a CPCN for the Franklin BESS with 60 MW of
24 operating capacity as well as the Hemingway BESS providing
25 12 MW of operating capacity, and (2) Case No. IPC-E-23-20
HACKETT, DI 8
Idaho Power Company

1 included the request for a CPCN to acquire an additional 24
2 MW of operating capacity for the Hemingway BESS . Following
3 filing of Case No. IPC-E-23-05 in February 2023, Idaho
4 Power determined that a capacity shortfall still existed in
5 2024 and therefore in May 2023, the Company filed Case No.
6 IPC-E-23-20 requesting approval to economically and
7 efficiently add 24 MW of battery storage to the planned 12
8 MW BESS at Hemingway. The Commission issued Certificate
9 Nos . 5441 and 5472 granting a CPCN for acquisition of 96 MW
10 of new dispatchable energy storage to meet the identified
11 capacity deficiency in 2024 .
12 Q. Did Order Nos . 35900 and 36011 impose any
13 conditions on costs associated with the procurement of the
14 Company-owned battery storage facilities providing 96 MW of
15 operating capacity?
16 A. Yes . With respect to the BESS providing 72 MW
17 of operating capacity approved with Order No. 35900 and the
18 BESS providing an additional 24 MW of operating capacity
19 approved with Order No. 36011, the Commission found it was
20 "fair, just, and reasonable to establish a soft cap"3 of
21 $ and $ , respectively. This
22 equates to a total soft cap of $
1 Case No. IPC-E-23-05, issued on October 27, 2023.
2 IPC-E-23-20, issued on January 4, 2024.
3 Order No. 35900, page 5 and Order No. 36011, page 6.
HACKETT, DI 9
Idaho Power Company

1 Q. Why did the Commission impose a soft cap on
2 the 2024 battery storage investments?
3 A. In both Order No. 35900 and 36011, the
4 Commission adopted Commission Staff' s ("Staff")
5 recommendation to implement the soft cap due to concerns
6 about whether least-cost, least-risk resources were
7 selected. In comments regarding the recommendation for the
8 soft cap on the BESS providing 72 MW of operating capacity,
9 Staff expressed concerns about ownership and resource type
10 restrictions .4 Similarly, in comments regarding the
11 recommendation for the soft cap on the BESS providing 24 MW
12 of operating capacity, Staff indicated they "believed that
13 due to the issues associated with the resource selection
14 process, the bid pool could have been larger and there
15 could have been additional final shortlisted projects with
16 lower costs . "5Neither soft cap foreclosed future requests
17 by Idaho Power for recovery of costs above the soft cap,
18 but rather indicated the Company would have to provide
19 justification for any costs above the soft cap when
20 requesting rate recovery.
21 Q. Was procurement of both the Franklin BESS and
22 the Hemingway BESS least-cost, least-risk?
23
4 Order No. 35900, page 3.
5 Order No. 36011, page 3.
HACKETT, DI 10
Idaho Power Company

1 A. Yes . The Company' s competitive solicitation
2 process was initiated as soon as practicable once the 2024
3 capacity deficiency was identified, with an RFP process
4 that did not restrict bids based on a resource type or
5 ownership structure, allowing bids for all commercially
6 viable resource types as well as third-party ownership of
7 those resources .6 Through the fair and competitive 2022 RFP
8 process, Idaho Power received 17 eligible project
9 submittals, comprising 23 different proposals, from 11
10 developers as potential for meeting the 2024 capacity
11 deficiency. Through qualitative and quantitative
12 evaluations, the RFP evaluation team narrowed the project
13 submittals to a final short list, and ultimately identified
14 a combination of two projects that resulted in the
15 acquisition of least-cost, least-risk resources : (1) the
16 100 MW solar PV facility combined with the Idaho Power-
17 owned Franklin BESS providing 60 MW of operating capacity,
18 and (2) the Hemingway BESS providing 36 MW of operating
19 capacity. The bid pool identified those resources that
20 could be constructed in the short timeframe and did not
21 hinder Idaho Power' s ability to identify the least-cost,
22 least-risk resources for meeting the 2024 capacity
23 deficiency.
24
6 As detailed in Sections 3.1 and 3.4 of the 2022 RFP.
HACKETT, DI 11
Idaho Power Company

1 Q. How do the Franklin BESS and Hemingway BESS
2 costs compare to the Commission' s soft cap?
3 A. The total Franklin BESS and Hemingway BESS
4 costs included in the Company' s request in this case are
5 $194 . 3 million compared to the Commission-established soft
6 cap for the combined Franklin BESS and Hemingway BESS
7 projects of $
8 Q. Should the Commission find project costs above
9 the soft cap are prudent?
10 A. Yes . The Franklin BESS and Hemingway BESS
11 projects represent the least-cost, least-risk resources to
12 meet the Company' s 2024 capacity deficits, and therefore
13 should be considered prudent investments . However, should
14 the Commission wish to evaluate the costs of those projects
15 in relation to the soft cap, it is important to consider
16 several necessary methodological adjustments to the soft
17 cap to make it a reasonable cost-effectiveness threshold.
18 First, I will address the soft cap established by
19 the Commission in Order No. 35900, with respect to the BESS
20 with 72 MW of operating capacity for which a CPCN was
21 granted in Case No . IPC-E-23-05 . In comments supporting its
22 position, Staff indicated they believed it was reasonable
23 to cap the proposed Franklin BESS and Hemingway BESS costs
24 based on the lowest unit price of the BESS facilities bid
25 into the 2022 RFP. However, the BESS that Staff selected as
HACKETT, DI 12
Idaho Power Company

1 the basis for the soft cap computation was not the most
2 cost-effective project identified to meet the 2024 capacity
3 deficit . Rather the most cost-effective project is the
4 project selected, the combined 100 MW solar PV plus 60 MW
5 energy storage facility. Staff' s analysis of the final
6 short list projects only captured the unit price associated
7 with the BESS and failed to account for the benefit
8 associated with the low PPA costs .
9 Q. Please explain how the low PPA costs
10 associated with the combined 100 MW solar PV plus 60 MW
11 energy storage facility result in a more cost-effective
12 project than the standalone energy storage project.
13 A. As part of the evaluation of the 2022 RFP
14 bids, Idaho Power used Energy Exemplar' s AURORA' s Long-Term
15 Capacity Expansion ("LTCE") modeling platform to develop
16 portfolios, through the selection of a variety of supply-
17 and demand-side resource options, that are least-cost,
18 least-risk for a variety of alternative future scenarios
19 while meeting reliability criteria. As a resource addition,
20 AURORA continually selected the combined solar PV and
21 battery storage in the LTCE analysis, indicating the low
22 solar PPA price is contributing to the value the project
23 provides as compared to the other final short list
24 projects . In addition to being a lower cost resource, when
25 compared to standalone battery storage systems, the
HACKETT, DI 13
Idaho Power Company

1 combined solar PV plus energy storage better meets the
2 Company' s capacity needs, resulting in a higher Effective
3 Load Carrying Capability than would exist as a standalone
4 energy storage system.
5 This was further evidenced in the additional AURORA
6 modeling scenario runs performed, which included a low
7 carbon/low gas scenario, a planning carbon/planning gas
8 scenario, and a high carbon/high gas scenario. In each of
9 these three futures, the same 2024 resources were selected,
10 confirming the 2024 resources selected reflect the least-
11 cost, least-risk option under a wide range of future
12 assumptions . As such, when computing a soft cap, it is more
13 appropriate to holistically consider the value of the 100
14 MW solar PV plus 60 MW energy storage facility and base the
15 soft cap of the 60 MW BESS on the unit price associated
16 with that project, as it was the least-cost resource
17 selected.
18 Q. How does the holistic evaluation you described
19 impact Staff' s soft cap calculation?
20 A. Under the holistic evaluation, which uses the
21 unit price of the least-cost resource, the soft cap
22 associated with the Franklin BESS would be approximately
23 $ , as opposed to Staff' s $
24 Q. Does the holistic evaluation impact the soft
25 cap established by the Commission for the Hemingway BESS
HACKETT, DI 14
Idaho Power Company

1 with 12 MW of operating capacity for which the Company
2 received a CPCN with Order No. 35900?
3 A. No, because Staff' s computation of the soft
4 cap was based on the unit price of the Hemingway BESS bid
5 submitted as part of the 2022 RFP, the 12 MW BESS . Idaho
6 Power believes there was, however, a flaw in Staff' s
7 methodology utilized to calculate the unit price for which
8 the soft cap was founded and ultimately
9 established by the Commission. Because this was the same
10 methodology for which Staff' s soft cap calculation of
11 $ for the BESS providing 24 MW of operating
12 capacity was based, and established by the Commission with
13 Order No . 36011, I will discuss the Company' s methodology
14 as it relates to the combined Hemingway BESS providing a
15 total of 36 MW of operating capacity, as a whole.
16 Q. What is Idaho Power' s underlying concern with
17 Staffs methodology for calculating the soft cap for the
18 Hemingway BESS?
19 A. The Company' s concerns with Staff' s
20 methodology for calculating the soft cap associated with
21 the Hemingway BESS relate to the exclusion of beginning of
22 life costs associated with the energy storage facility.
23 Battery cells within a BESS degrade over time . For example,
24 for illustrative purposes, a 100 MW BESS installation will
25 supply 100 MWs to the system on day one; however, assuming
HACKETT, DI 15
Idaho Power Company

1 a 7 percent degradation rate, that same 100 MW BESS will
2 only supply 93 MW to the system after one year. The
3 degradation rate varies and is a function of time and
4 throughput, or megawatt-hours . To mitigate the degradation,
5 additional battery segments are added. The Company believes
6 that when computing the unit price of the Hemingway BESS,
7 the project costs of the Hemingway BESS should include the
8 costs associated with day one batteries that mitigate
9 immediate degradation. By including additional battery
10 segments at the beginning of life, Idaho Power can ensure
11 reliable operation at full nameplate capacity (36 MW) for a
12 minimum of 4 hours through the first five years of
13 operation before necessitating a decision to augment the
14 BESS if the then current capacity is below the nameplate
15 capacity after year five . If the BESS system is not cycled
16 daily, the longevity and assurance of performing above the
17 nameplate capacity beyond five years is likely and thus
18 deferral of future augmentation investments can occur.
19 Q. Does Idaho Power believe the overbuild of the
20 BESS is necessary for day one operations?
21 A. Yes . The overbuild is necessary as it provides
22 for the most efficient plant balancing and cell
23 utilization, extending the guaranteed performance of the
24 entire system and ensuring the Company has the capacity
25 necessary to meet customer demand. Absent overbuild,
HACKETT, DI 16
Idaho Power Company

1 immediately upon the BESS being placed in service, Idaho
2 Power would instantly be placed in a resource deficit
3 relative to the required capacity resources of 36 MW,
4 necessitating additional procurement activities . It is
5 also consistent with the industry and how many other
6 utilities procure batteries .
7 Q. Why did Staff exclude the overbuild costs as a
8 component of their Hemingway BESS unit cost calculation?
9 A. Staff concerns about the overbuild amounts
10 were twofold: uncertainties related to the cost-
11 effectiveness of the projects absent the overbuild costs'
12 and when the batteries associated with the overbuild became
13 used and useful .$ First, Idaho Power' s basis for comparison
14 of BESS proposals was consistent among all projects during
15 evaluation through the RFP process . Because some projects
16 included overbuild in their proposals and some did not, to
17 ensure a consistent basis for comparison, the Company
18 adjusted all proposal prices to exclude overbuild costs for
19 bid evaluation purposes . Because adding battery cells is
20 linear from a cost perspective, the least cost project at a
21 0 overbuild is going to be the least cost project with a 5
22 year overbuild due to the linear nature of adding battery
23 cells . Therefore, the overbuild was appropriately captured
7 Case No. IPC-E-23-05, Staff Comments, pg. 5.
8 Case No. IPC-E-23-20, Staff Comments, pg. 12.
HACKETT, DI 17
Idaho Power Company

1 when comparing bids submitted as part of the 2022 RFP; the
2 selection of the Hemingway BESS was a least-cost resource .
3 Q. What concerns did Staff express regarding when
4 the BESS became used and useful?
5 A. Staff suggested the Company did not provide
6 certainty about when the overbuilt capacity would become
7 used and useful due to Idaho Power' s lack of experience
8 owning and operating a BESS, and indicated the manufacturer
9 warranties could be used for the first several years to
10 mitigate excessive degradation. However, manufacturer
11 warranties would only cover the failure of a battery cell,
12 not degradation of the BESS and therefore cannot be relied
13 upon to ensure reliable operation of the BESS at full
14 nameplate capacity.
15 Further, Staff did not recognize Idaho Power' s
16 first-hand, recent experience owning and operating an 80 MW
17 BESS at the Company' s Hemingway substation, placed in
18 service in 2023 . The 80 MW BESS includes overbuild, to
19 ensure reliable operation at full nameplate capacity, that
20 became used and useful immediately upon being placed in
21 service . The additional battery cells, which are cycled
22 along with the rest of the battery cells, result in more
23 time that the BESS can discharge at its nameplate capacity,
24 allowing for approximately 4 . 5 hours of discharging as
25 opposed to only 4 hours of discharging that would occur
HACKETT, DI 18
Idaho Power Company

1 absent the overbuild. The overbuild associated with the 36
2 MW Hemingway BESS will likewise be used, useful, and
3 provide benefits to customers as soon as it is placed in
4 service in 2024 . As such, Idaho Power believes it is
5 appropriate to include the overbuild costs as a component
6 of the unit price calculation of the 36 MW Hemingway BESS .
7 Q. How does the Company' s inclusion of beginning
8 of life costs impact Staff' s soft cap calculation?
9 A. Under the adjusted soft cap methodology to
10 include the beginning of life costs in the unit price
11 calculation, the soft cap associated with the Hemingway
12 BESS would be approximately $ , as opposed to
13 Staff' s $ ($ associated with the
14 12 MW BESS from Case No. IPC-E-23-05 and
15 associated with the 24 MW BESS from Case No. IPC-E-23-20) .
16 Q. In total, how do the Company' s combined
17 Franklin BESS and Hemingway BESS soft cap calculations
18 compare to the soft cap imposed by the Commission?
19 A. As shown in Table 1 below, the total soft cap
20 for the combined Franklin BESS and Hemingway BESS providing
21 96 MW of operating capacity would be $ under
22 Idaho Power' s holistic evaluation compared to $-
23 under Staff' s methodology.
24
25
HACKETT, DI 19
Idaho Power Company

1 Table 1 .
2 BESS Soft Cap Computation
Staff' s Proposal Adjusted
Methodology
Franklin BESS
Hemingway BESS
ANNINU-
Total
3
4 Q. What is the total investment in the 96 MW of
5 Company-owned battery storage included in Idaho Power' s
6 request in this case?
7 A. The Company is requesting in this case to
8 include the revenue requirement associated with an
9 investment amount of $194 . 3 million in rates for the
10 Franklin BESS and Hemingway BESS, which is less than the
11 $ soft cap under Idaho Power' s methodology.
12 Q. Does the information presented in your
13 testimony support Idaho Power' s assertion that the Franklin
14 BESS and Hemingway BESS providing 96 MW of operating
15 capacity in total procured by the Company were the least-
16 cost option to meet the 2024 capacity deficiency?
17 A. Yes . Idaho Power identified a 2024 capacity
18 deficiency in May 2021 and issued an RFP as soon as
19 practicable in December 2021 . This robust competitive
20 process ultimately resulted in the procurement of the
21 Franklin BESS and Hemingway BESS providing 96 MW of
22 operating capacity in total and included in the Company' s
23 request in this case . The final cost of these batteries is
HACKETT, DI 20
Idaho Power Company

1 lower than the soft cap computations proposed by Staff when
2 adjusted for methodological deficiencies . For these
3 reasons, the batteries providing 96 MW of operating
4 capacity and included in this case represent the least-
5 cost, least-risk option for customers .
6 III . FISH HATCHERY RENOVATION
7 Q. Which fish hatchery required renovation?
8 A. Idaho Power' s Oxbow hatchery, located
9 downstream from the Oxbow dam powerhouse at the mouth of
10 Pine Creek, is the holding and spawning facility for adult
11 steelhead migrating up the Snake River above its confluence
12 with the Salmon River. Built in 1961, the Oxbow hatchery
13 was the first hatchery facility constructed by the Company
14 as part of its hatchery mitigation program and is required
15 by the Federal Energy Regulatory Commission ("FERC") as
16 part of Idaho Power' s operating license for the Brownlee,
17 Oxbow, and Hells Canyon dams ("Hells Canyon Complex") . Due
18 to the aging infrastructure and need for modernization, and
19 the license requirement that the Company provide the
20 facility, it was essential the hatchery undergo an
21 extensive renovation.
22 Q. Please describe the Oxbow hatchery and its
23 operations .
24 A. The Oxbow hatchery is an Idaho Power facility,
25 operated by the Idaho Department of Fish and Game, with
HACKETT, DI 21
Idaho Power Company

1 facilities that formerly consisted of: (1) a small metal
2 building containing an office and incubation room, (2) two
3 concrete adult fish holding ponds, (3) two small concrete
4 fish-rearing raceways, (4) river water intake structure,
5 (5) a wood-framed hatchery manager' s residence, and (6) a
6 wood-framed bunkhouse .
7 The Oxbow hatchery traps and spawns enough adult
8 steelhead to provide the Niagara Springs hatchery with
9 approximately one million eggs annually. A majority of the
10 steelhead broodstock are trapped in November. These fish
11 are kept in holding ponds at the hatchery over the winter
12 to await spawning the following spring. Another small
13 portion of broodstock is usually collected each spring if
14 river conditions are conducive to operation of the trap.
15 This ensures that fish are collected and spawned from all
16 portions of the run. Spawning of approximately 600 male and
17 female fish begins in mid-March and concludes by late
18 April, with each female producing around 5, 000 eggs . Eggs
19 are then incubated at the hatchery until early May when
20 they are transferred to the Niagara Springs hatchery. In
21 March of the following year, fish have reached smolt size,
22 approximately 8 inches, and are hauled in tankers to the
23 Snake River where they are released below Hells Canyon dam
24 to begin their 570-mile migration to the Pacific Ocean.
25
HACKETT, DI 22
Idaho Power Company

1 In addition, hatchery staff operate the trap at the
2 Hells Canyon dam from May through mid-July to collect
3 spring Chinook salmon adults for use as broodstock at the
4 Rapid River hatchery, with the intent of trapping
5 approximately 250 adult salmon to produce 350, 000 smolts
6 annually. When spawning begins at the Rapid River hatchery
7 in August, a portion of the eggs collected there are
8 transferred to Oxbow hatchery for initial incubation.
9 These eggs are incubated for about one month and then
10 shipped back to Rapid River hatchery to complete incubation
11 and rearing.
12 Q. What were the signs the Oxbow hatchery
13 infrastructure was aging and needed renovation?
14 A. The main hatchery building, which contains the
15 office and an incubation room, had aged to the point where
16 water was leaking through the wall in the incubation room
17 and into the office . In addition, the ventilation system
18 was poor, allowing for chemical smells from the incubation
19 room to infiltrate the office . Furthermore, the river water
20 intake structure was severely degraded and at risk of
21 failure .
22 Q. You indicated the Oxbow hatchery was required
23 by FERC to operate the Hells Canyon Complex. What agreement
24 dictates Idaho Power' s requirement to fund the Oxbow
25 hatchery?
HACKETT, DI 23
Idaho Power Company

1 A. While construction of the Oxbow hatchery was
2 first necessitated by the FERC order of December 11, 1963,
3 that amended the Hells Canyon Complex license issued by
4 FERC effective July 31, 1955, a Settlement Agreement
5 entered into on February 14, 1980, between the National
6 Marine Fisheries Service, the Idaho Department of Fish and
7 Game, the Oregon Department of Fish and Wildlife, and the
8 Washington Department of Game ("1980 Settlement
9 Agreement") , dictates the current Oxbow hatchery operations
10 for which the Company is obligated.
11 Q. The Company has been involved in renewing its
12 long-term federal licenses for operating the Hells Canyon
13 Complex since 2003 . Does Idaho Power expect when FERC
14 issues the new license for the Hells Canyon Complex it will
15 include the requirement that the Company maintain the Oxbow
16 hatchery?
17 A. Yes . In fact, the renovation of the Oxbow
18 hatchery is a known requirement of the forthcoming new
19 license, having been identified as a key feature in the
20 2003 license application and further indicated as a project
21 feature by FERC in their 2007 Environmental Impact
22 Statement . However, due to the continued delay in the
23 issuance of a new license by FERC, the significant signs of
24 aging and potential safety issues, and the requirements
25 under the existing 1980 Settlement Agreement, renovation
HACKETT, DI 24
Idaho Power Company

1 and modernization of the Oxbow hatchery was imminent. As
2 such, in an application filed with FERC on October 8, 2021,
3 Idaho Power proposed to rebuild the Oxbow hatchery while
4 also proposing to include the hatchery as a project feature
5 in the existing license, as it inadvertently had not been
6 recognized as a project feature within the existing license
7 when constructed. FERC approved and included the renovated
8 Oxbow hatchery into the FERC license with its Order
9 Amending License, Approving Exhibit M, and Revising Project
10 Description issued January 26, 2023 . In addition to the
11 1980 Settlement Agreement and the existing and future Hells
12 Canyon Complex licenses requiring the Oxbow hatchery, FERC
13 has approved the rebuild of the Oxbow hatchery.
14 Q. Please detail the renovation and modernization
15 of the facility.
16 A. The renovation and modernization of the Oxbow
17 hatchery included the removal of the hatchery building, the
18 adjacent cooling unit, abandoned raceways in the northeast
19 corner of the site, the abandoned raceway west of the
20 existing hatchery building, intake structure, holding
21 ponds, sorting and spawning equipment, and a garage/storage
22 building. The Company will add a larger set of holding
23 ponds with an open-air structure covering them, a masonry
24 sorting and spawning building, a wood-framed hatchery
25 building, a wood-framed shop and storage building, a
HACKETT, DI 25
Idaho Power Company

1 surface water intake structure and aeration tower, and a
2 new visitor kiosk with interpretive and educational
3 information. The new intake structure addresses structural
4 and flood elevation issues that were experienced with the
5 existing intake structure. The rebuilt hatchery also
6 incorporated improved stormwater drainage infrastructure
7 and paved throughways and parking areas, with fill brought
8 in so that the hatchery meets floodplain requirements .
9 Q. Did the Company have to cease hatchery
10 operations while the renovation occurred?
11 A. No. The existing facility continued to operate
12 during construction and met its primary functions as : (1) a
13 sorting and transfer point for fish captured at the Hells
14 Canyon trap, (2) spawning, incubation and broodstock
15 holding for adult steelhead, and (3) incubation of spring
16 Chinook salmon, and short-term holding for adult spring
17 Chinook. No changes occurred to the number of fish held
18 onsite nor any plans to raise fish onsite occurred.
19 Q. Has the Oxbow hatchery renovation been
20 completed?
21 A. No. However, most of the work has been
22 completed, with final work expected to be finished in the
23 fall of 2024 . The facilities related to the majority of the
24 costs are expected to be placed in service in September
25 2024 . The Oxbow hatchery renovation is necessary to
HACKETT, DI 26
Idaho Power Company

1 maintain operations of the Hells Canyon Complex in
2 accordance with the FERC license and the 1980 Settlement
3 Agreement and is necessary for the continued safe, reliable
4 operation of the facility.
5 IV. CONCLUSION
6 Q. Please summarize your testimony.
7 A. Idaho Power experienced unprecedented growth
8 over the past decade, resulting in the need for the Company
9 to procure its first utility-scale resources in over a
10 decade . Idaho Power' s investment in the 2024 batteries
11 reflects the least-cost, least-risk option to meet the
12 Company' s resource need, as identified in the 2024 CPCN
13 cases and affirmed by Commission Order Nos . 35900 and
14 36011 . In addition, the 2024 renovation of one of the
15 Company' s aging fish hatcheries is necessary for licensing
16 of one of Idaho Power' s hydro facilities, ensuring it is
17 able to continue to provide safe, clean and reliable energy
18 to customers .
19 Q. Does this conclude your direct testimony in
20 this case?
21 A. Yes, it does .
22
23
24
25
HACKETT, DI 27
Idaho Power Company

1 DECLARATION OF ERIC HACKETT
2 I, Eric Hackett, declare under penalty of perjury
3 under the laws of the state of Idaho:
4 1 . My name is Eric Hackett. I am employed by
5 Idaho Power Company as the Projects and Resource
6 Development Director.
7 2 . On behalf of Idaho Power, I present this
8 pre-filed direct testimony in this matter.
9 3 . To the best of my knowledge, my pre-filed
10 direct testimony is true and accurate.
11 I hereby declare that the above statement is true to
12 the best of my knowledge and belief, and that I understand
13 it is made for use as evidence before the Idaho Public
14 Utilities Commission and is subject to penalty for perjury.
15 SIGNED this 31st day of May 2024, at Boise, Idaho.
16
17 Signed:
18 ERIC HACKETT
19
20
21
22
23
HACKETT, DI 28
Idaho Power Company

BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF THE APPLICATION )
OF IDAHO POWER COMPANY TO ) CASE NO. IPC-E-24-07
INCREASE RATES FOR ELECTRIC )
SERVICE TO RECOVER COSTS )
ASSOCIATED WITH INCREMENTAL )
CAPITAL INVESTMENTS AND CERTAIN )
ONGOING OPERATIONS AND )
MAINTENANCE EXPENSES . )
IDAHO POWER COMPANY
DIRECT TESTIMONY
OF
MITCH COLBURN

1 Q. Please state your name, business address, and
2 present position with Idaho Power Company ("Idaho Power" or
3 "Company") .
4 A. My name is Mitch Colburn. My business address
5 is 1221 West Idaho Street, Boise, Idaho 83702 . I am
6 employed by Idaho Power as the Vice President of Planning,
7 Engineering, and Construction.
8 Q. Please describe your educational and
9 professional experience.
10 A. I graduated from the University of Idaho in
11 2006 with a Bachelor of Science degree in Electrical
12 Engineering, Summa Cum Laude. Thereafter, I obtained a
13 Master of Engineering degree in Electrical Engineering from
14 the University of Idaho in 2010 and a Master of Business
15 Administration from Boise State University in 2015 . I am a
16 licensed Professional Engineer in the State of Idaho.
17 I have worked at Idaho Power since 2007 . Prior to my
18 current role, I served as Director of Engineering and
19 Construction, Director of Resource Planning and Operations,
20 Senior Manager of Transmission & Distribution Strategic
21 Projects, Engineering Leader over 500 kilovolt ("kV") and
22 Joint Projects . I held several engineering roles prior to
23 these leadership roles .
24 Q. What are your duties as Vice President of
25 Planning, Engineering, and Construction?
COLBURN, DI 1
Idaho Power Company

1 A. I am responsible for an organization of more
2 than 380 employees focused on multiple areas : (1)
3 identifying future electric grid infrastructure
4 requirements, (2) operating and maintaining the electric
5 grid, including the wildfire mitigation program and
6 vegetation management, and (3) designing, engineering, and
7 constructing grid infrastructure projects .
8 I . OVERVIEW
9 Q. What is the purpose of your testimony in this
10 matter?
11 A. The purpose of my testimony is to discuss the
12 investments the Company has made in the electrical grid to
13 ensure the provision of safe, reliable service to
14 customers .
15 Q. How is your testimony organized?
16 A. My testimony will begin with a discussion of
17 the transmission and distribution-related major projects
18 included in Idaho Power' s request in this case that
19 demonstrate the Company' s prudent investment in the
20 electrical grid at the transmission and distribution
21 levels . Next, I will discuss the Wood River Valley
22 Reliability Project ("WRV Project") , a combined
23 distribution and transmission project for which the Company
24 has received a Certificate of Public Convenience and
COLBURN, DI 2
Idaho Power Company

1 Necessity ("CPCN") , ' the distribution portion of those
2 investments which are proposed for recovery in this case .
3 My testimony will conclude with a discussion of a project
4 resulting from a grid modernization initiative, which will
5 ultimately support all generation, transmission, and
6 distribution investments .
7 II . TRANSMISSION INVESTMENTS
8 Q. Please describe how the Company defines the
9 transmission-related portion of the electrical grid.
10 A. Transmission generally describes the bulk or
11 high voltage components of the electrical grid, including
12 stations and high voltage lines typically utilized to
13 transmit large volumes of electricity closer to load
14 centers . On Idaho Power' s system, transmission equipment is
15 considered to be facilities at or above 138 kilovolts
16 ("kV") , with an additional sub-transmission component
17 comprised of facilities at 46-kV and 69-kV.
18 Q. How have the transmission-related investments
19 grown since the completion of the last general rate case in
20 2023, Case No. IPC-E-23-11 ("2023 GRC") ?
21 A. Of the $860 million in infrastructure placed
In the Matter of the Application of Idaho Power Company for a
Certificate of Public Convenience and Necessity to Construct System
Improvements for Wood River Valley Customers, Case No. IPC-E-16-28,
Certificate No. 537 (Jul. 26, 2022) ; In the Matter of the Idaho Power
Company's Petition for Approval of a Customer Surcharge and Modified
Line Route Configuration for Construction of a New 138 kV Transmission
Line in the Wood River Valley, Case No. IPC-E-21-25, Amended
Certificate No. 537 (Aug. 2, 2022) .
COLBURN, DI 3
Idaho Power Company

1 in service over this period, approximately $125 . 4 million
2 reflects expected investment in the Company' s transmission
3 system in 2024, or growth of 9 . 3 percent since the
4 Company' s 2023 GRC.
5 Q. What drives investment in the transmission
6 system?
7 A. Growth and reliability are the primary drivers
8 of the transmission investments reflected in the Company' s
9 request in this case. Growth-related projects typically
10 include either the construction of new transmission
11 facilities or the expanded capacity of existing facilities .
12 Reliability projects typically include the proactive
13 reconstruction or replacement of aging facilities . My
14 testimony will discuss three transmission-related major
15 projects expected to be complete in 2024, all of which were
16 required to address aging infrastructure: (1) the rebuild
17 of a portion of Line 423, (2) the rebuild of a portion of
18 Line 902, and (3) the replacement of a series capacitor
19 bank.
20 The Rebuild of Line 423
21 Q. Please describe the portion of Line 423 that
22 was rebuilt.
23 A. Line 423 is a 138-kV line that runs from
24 Ontario to the Quartz substation, south of Baker City in
25 Oregon. This project rebuilt the Huntington to Quartz 138-
COLBURN, DI 4
Idaho Power Company

1 kV portion of Line 423 ("Huntington-Quartz line") due to
2 the age of the existing line and resulting reliability
3 issues . When evaluating potential outage sources it was
4 noted that due to the age of the lines, shield wires had
5 not been installed on the lines and therefore lightning was
6 likely contributing to the performance issues . Thus, the
7 Company engaged POWER Engineers, Inc. ("POWER Engineers") ,
8 to perform a study to analyze the entire Ontario to Quartz
9 138-kV line, and specifically the Huntington to Quartz
10 section to determine if a rebuild on the line would
11 increase reliability.
12 Q. What were the results of the analysis?
13 A. POWER Engineers used a lightning performance
14 software, analyzing three cases, each with two different
15 footing resistance assumptions : (1) the existing wood
16 structure with no shield wires, (2) a new wood structure
17 with two shield wires, and (3) a new steel structure with
18 two shield wires . The results indicated that the overall
19 line performance would be significantly improved with the
20 addition of shield wires and further improvement is
21 expected if steel structures were used in combination with
22 the addition of shield wires .
23 Q. Did Idaho Power replace the existing wood
24 structures with steel structures?
25 A. Yes . The Huntington-Quartz line rebuild
COLBURN, DI 5
Idaho Power Company

1 involved the replacement of 286 structures from the
2 Huntington substation to the Quartz substation with tubular
3 steel 138-kV structures with shield wire and optical ground
4 wire for fiber optic communications . The majority of the
5 existing wood structures were installed in 1951 and
6 therefore did not have space for the addition of shield
7 wires . Moreover, because the Huntington-Quartz line was
8 identified as being in a wildfire prone area, the project
9 was prioritized, and grid hardening performed as part of
10 the rebuild. Grid hardening includes the use of steel
11 structures for resiliency against wildfires and improved
12 customer reliability. The project is identified in Table 13
13 of the Company' s 2024 Wildfire Mitigation Plan,2 which lists
14 the transmission line rebuild projects planned over the
15 next five years and necessitating steel structures in
16 wildfire prone areas .
17 Q. How does the addition of shield wires improve
18 reliability?
19 A. Shield wires are installed above the
20 conductors for the purpose of channeling lightning strikes
21 to ground, which helps to prevent or minimize damage to
22 power lines and equipment, avoid major outages on the line,
23 and mitigate maintenance and repair costs . The rebuild of
24 the Huntington-Quartz line, with a total cost of
2 2024 Wildfire Mitigation Plan at 89-91.
COLBURN, DI 6
Idaho Power Company

1 approximately $15 . 0 million and an anticipated in service
2 of October 2024, was necessary to ensure Idaho Power
3 continues providing safe, reliable electric service to its
4 customers .
5 The Rebuild of Line 902
6 Q. What drove the rebuild of Line 902?
7 A. Line 902 is one of the three 230-kV
8 transmission lines that run from the Boise Bench substation
9 to the Midpoint substation. Line 902 has been connected to
10 and split into many line sections by station additions over
11 the years, and is now comprised of the Midpoint to Justice,
12 Justice to Mountain Air Wind Tap, Mountain Air Wind Tap to
13 Rattlesnake, Rattlesnake to DRAM, and finally DRAM to Boise
14 Bench segments . Similar to Line 423, Line 902 was
15 originally built over 70 years ago, with 478 of the
16 original structures from 1947 in place.
17 The Company follows transmission maintenance and
18 inspection practices in accordance with Western Electricity
19 Coordinating Council and the North American Electric
20 Reliability Corporation ("NERC") requirements to ensure
21 compliance with applicable safety and reliability standards
22 and takes proactive steps to repair or replace transmission
23 line components on an ongoing basis as part of asset
24 management and aging infrastructure assessments . Pursuant
25 to its Transmission Maintenance and Inspection Plan
COLBURN, DI 7
Idaho Power Company

1 ("TMIP") , the Company performs line inspections to identify
2 conditions or defects and inform, prioritize, and schedule
3 maintenance activities . Routine line patrols are conducted
4 annually and comprehensive maintenance inspections are
5 generally performed every 10 years, and include a detailed
6 inspection of all transmission line components and a pole
7 inspection and ground-line treatment of all wood poles in
8 the line. When inspected, many poles and cross arms on Line
9 902 were found to be in poor condition and as a result of
10 this process, Line 902 was identified as needing to be
11 rebuilt . The rebuild project will occur in four phases, the
12 first of which is included in the Company' s request in this
13 case, approximately 36-mile Rattlesnake substation to DRAM
14 substation section ("Rattlesnake to DRAM") .
15 Q. What are the consequences of delaying the
16 rebuild of the line?
17 A. Delaying the rebuild of Line 902 could result
18 in higher maintenance and repair costs should the
19 structures need replacement individually, while also
20 potentially reducing reliability. Further, the Company' s
21 Integrated Resource Plan has repeatedly identified the need
22 for resource additions east of the Treasure Valley and
23 rebuilding the line with larger conductors is the most
24 cost-effective way to integrate those resources .
25 Q. Were there any other implementation
COLBURN, DI 8
Idaho Power Company

I considerations related to the Line 902 rebuild project?
2 A. Yes . The Company' s inspection and maintenance
3 activities helps inform planning for rebuild projects
4 including consideration of wildfire risk and the resulting
5 prioritization of transmission line rebuild projects . All
6 four phases of the Line 902 rebuild fall within the
7 wildfire prone areas as identified in Idaho Power' s
8 Wildfire Mitigation Plan, including the Rattlesnake to DRAM
9 section. Therefore, all four phases of the line rebuild
10 will utilize steel structures for resiliency against
11 wildfires and to improve customer reliability.
12 Q. What is the total investment associated with
13 the Rattlesnake to DRAM rebuild included in the Company' s
14 request in this case?
15 A. Idaho Power is requesting to include the
16 revenue requirement associated with an investment amount of
17 $21 .2 million in rates for the Rattlesnake to DRAM rebuild,
18 which is anticipated to be placed in service in December
19 2024 .
20 The Series Capacitor Bank Replacement
21 Q. What drove the need for the replacement of the
22 series capacitor bank?
23 A. The series capacitor bank at the Midpoint
24 Station was over 40 years old, having been installed in
25 1980 and needed replacement. While the asset life of a
COLBURN, DI 9
Idaho Power Company

1 series capacitor bank can be longer, major components need
2 to be replaced every 15 to 30 years, depending on the part.
3 However, new parts for the series capacitor bank at the
4 Midpoint Station were difficult to procure and some parts
5 had become obsolete, including certain relay parts, control
6 potential transformers, un-balance current transformers,
7 spark gaps, and the triggering circuit for the spark gap.
8 Q. Was a deferment in the replacement of the
9 series capacitor bank an option?
10 A. No. Replacement of the series capacitor bank
11 at the Midpoint Station had first been considered in 2015
12 and was deferred several times . This series capacitor bank
13 is jointly-owned, and therefore jointly-funded with
14 PacifiCorp, requiring company approval, and coordination
15 with PacifiCorp' s corresponding capacitor banks . A failure
16 of a trigger or spark gap, or a loss of a critical relay,
17 could disable either one or both of the series capacitor
18 bank segments indefinitely. The bank ensures the Midpoint
19 Station transformer is not overloaded and prevents derating
20 the transmission paths at Midpoint up to 280 MW' s, which is
21 critical to the continued reliability.
22 Q. When did work to replace the Midpoint Station
23 series capacitor bank begin?
24 A. In accordance with the Joint Ownership and
25 Operating Agreement between Idaho Power Company and
COLBURN, DI 10
Idaho Power Company

1 PacifiCorp ("JOOA") , Idaho Power sponsored the project,
2 commencing in early 2022 . The project was completed in
3 April 2024, and the transmission investments placed in
4 service . Also, in accordance with the JOOA, PacifiCorp
5 funded 36 . 33 percent of the project therefore the amounts
6 included in the Company' s request in this case, $11 . 3
7 million, reflect only Idaho Power' s 63 . 67 percent share of
8 the series capacitor bank investment.
9 Q. Do the transmission-related major projects you
10 discussed demonstrate a prudent approach to investment in
11 the Company' s transmission system and support Idaho Power' s
12 transmission-related rate base included in this case?
13 A. Yes . In just one year, the Company is
14 investing over $125 . 4 million in its transmission system.
15 Idaho Power is constantly evaluating the capacity needs,
16 resiliency, and reliability of its transmission system,
17 ensuring that the electrical grid is stable and in
18 compliance with NERC standards . Further, the Company is
19 dedicated to the safety of its customers and communities as
20 evidenced in the continuously evolving Wildfire Mitigation
21 Plan. Idaho Power works to reduce the risk of wildfire
22 ignition through the implementation of core mitigation
23 approaches, such as grid hardening of the electrical
24 system, as evidenced by the transmission-related
25 investments I discussed in my testimony.
COLBURN, DI 11
Idaho Power Company

1 III . DISTRIBUTION INVESTMENTS
2 Q. Please describe how the Company defines the
3 distribution-related portion of the electrical grid.
4 A. Distribution refers to equipment at 34 . 5-kV
5 and below, including lower voltage lines, substations, and
6 transformers that are typically utilized to provide
7 electricity at the lower voltages required by the majority
8 of end-use customers .
9 Q. How have the distribution-related investments
10 grown since the completion of the 2023 GRC?
11 A. Of the $860 million in infrastructure placed
12 in service over this period, approximately $186 . 6 million
13 reflects expected investment in the Company' s distribution
14 system in 2024, or growth of 10 . 2 percent since the 2023
15 GRC .
16 Q. What factors contributed to investment in
17 Idaho Power' s distribution system over this period?
18 A. Growth in the distribution system can be
19 directly tied to the addition of new customers, as every
20 new customer, regardless of service level, requires some
21 form of additional equipment. In addition, similar to
22 certain components of the Company' s generation and
23 transmission systems, Idaho Power has also undertaken a
24 number of key projects to proactively harden its
25 distribution system to maintain and improve reliability in
COLBURN, DI 12
Idaho Power Company

1 light of aging infrastructure. The next section of my
2 testimony will discuss at length the distribution-related
3 major project completed in 2024, the distribution portion
4 of the WRV Project, including providing an overview of its
5 long and complex regulatory history.
6 IV. WOOD RIVER VALLEY RELIABILITY PROJECT
7 Q. Please describe the WRV Project .
8 A. Idaho Power' s WRV Project includes a
9 combination of electric distribution, transmission, and
10 substation work, in which the Company will bury or rebuild
11 existing distribution lines as well as new overhead and
12 underground transmission line between the Wood River
13 substation in Hailey and the Ketchum substation in
14 northeastern Ketchum. The new transmission line and related
15 facilities will provide a redundant source of energy into
16 the northern portion of the Wood River Valley, including
17 the communities of Ketchum and Sun Valley and portions of
18 Blaine County (collectively referred to as the "North
19 Valley") .
20 Q. What drove the need for the WRV Project?
21 A. The North Valley contains the resort
22 communities of Ketchum and Sun Valley as well as the Sun
23 Valley ski resort. Currently, the North Valley is served by
24 the Wood River and Ketchum substations, which are connected
25 to the Company' s transmission system by a single-source,
COLBURN, DI 13
Idaho Power Company

1 12 . 4 mile, 138-kV radial line that was built in 1962 with
2 wooden poles . If the line experiences sustained outages,
3 and the outages may be lengthy because access to repair the
4 line is impeded by residential development, rough terrain,
5 and aged construction roads in many areas . Further, the
6 mountainous terrain limits vehicle access, impedes
7 equipment set-up, and contributes to avalanche threats .
8 Ultimately, the need to construct the WRV Project was to:
9 (1) increase reliability to the area by providing a
10 redundant source of energy, and (2) reconstruct the
11 existing and aging 138-kV radial transmission line without
12 long-term disruption of service to the North Valley.
13 Q. Does the Company have standard business
14 practices it follows for determining when construction of a
15 redundant transmission line is needed?
16 A. Yes . Idaho Power generally initiates and
17 constructs a second transmission source and transformer
18 when a substation peak load is projected to exceed 40
19 megawatts ("MW") . With peak loads of about 60 MW at the
20 Ketchum and Elkhorn substations3, coupled with the winter
21 tourism population in the North Valley, the need for a
22 second transmission line was strongly supported. Multiple
23 transmission sources are standard practices that Idaho
3 The Elkhorn substation is located between the Ketchum and Wood River
substations, via a tap connection on the existing Wood River to Ketchum
line.
COLBURN, DI 14
Idaho Power Company

1 Power implements to reduce the likelihood of sustained
2 outages . Additionally, the Company installs distribution
3 circuit tie switches, where adjacent circuits are
4 available, to reduce the duration of sustained outages on
5 the radially sourced distribution system.
6 Q. Were there any alternatives to the redundant
7 transmission line component of the WRV project?
8 A. No. Reconstruction of the existing line, which
9 was required whether a redundant transmission line was
10 constructed or not, was not feasible absent long-term
11 outages without building either a redundant transmission
12 line or a temporary line that would be removed after
13 construction because of the extreme disruption of service
14 required by the reconstruction.
15 WRV Project Background
16 Q. Prior to commencing work, did Idaho Power
17 perform any community outreach and invite public
18 participation regarding the plan for the WRV Project?
19 A. Yes . In 1995, the Company first undertook an
20 extensive public involvement process regarding the proposed
21 construction of the WRV Project . At the conclusion of the
22 process, Idaho Power carefully evaluated the input received
23 from the area' s public officials and citizens . The general
24 response at that time was that, despite the unavoidable
25 risk of an outage to the existing transmission line, the
COLBURN, DI 15
Idaho Power Company

1 proposed new transmission line should not be built . The
2 reasons for the public opposition included the difficulty
3 of finding an acceptable route for the transmission line,
4 aesthetic impacts, perceived health and safety concerns,
5 and the requirement that local funding of incremental costs
6 of placing part or all the line underground would be
7 required. The project was put on hold indefinitely and
8 Idaho Power' s previous Certificate of Public Convenience
9 and Necessity to construct the line was cancelled. 4
10 Subsequently, in 2004, Idaho Power initiated several
11 Community Advisory Committees ("CAC") and undertook a
12 comprehensive, cooperative transmission planning exercise
13 with the communities and leaders across its service
14 territory. These committees were created to provide a
15 cooperative effort between the Company and the communities
16 it serves in developing an outline for prioritized
17 improvements and additions to Idaho Power' s transmission
18 and substation infrastructure. One of those, the Wood River
19 CAC, was convened in 2007 and developed the Wood River
20 Valley Electrical Plan ("WREP") , a comprehensive plan for
21 future transmission facilities in the Wood River Valley.
22 Q. Did the WREP include some form of the WRV
4 In the Matter of the Application of Idaho Power Company for an Amended
Certificate of Public Convenience and Necessity No. 272, Case No. IPC-
E-95-06, Order No. 26107 and cancelled Certificate No. 272 (Aug. 1995) ;
Case No. U-1006-89, Order No. 11315 and Certificate No. 272 (Feb.
1974) .
COLBURN, DI 16
Idaho Power Company

1 Project?
2 A. Yes . The WREP included construction of the
3 redundant 138-kV transmission line between the Wood River
4 and Ketchum substations . The WREP was updated in 2011 after
5 additional deliberations and extensive public outreach, and
6 in 2012 the CAC reconvened to provide additional input for
7 planned open house events . In 2014, both the City of
8 Ketchum and the Ketchum Energy Advisory Committee were
9 invited to join the CAC, which reaffirmed the need for a
10 second energy path into the North Valley. While most of the
11 parties generally agreed upon the purpose and need for the
12 redundant transmission line, the consensus opinion was that
13 a feasible route could only be obtained and permitted if at
14 least a portion of the line was underground. However, the
15 parties were unable to reach agreement about the funding
16 and payment of any incremental cost difference between an
17 overhead, or least-cost alternative, and an underground, or
18 higher-cost build.
19 Q. Did Idaho Power provide an option for
20 undergrounding a portion of the WRV Project such that no
21 incremental cost recovery from the local jurisdictions
22 would be required?
23 A. Yes . The proposed line route and facilities
24 included a 138-kV overhead transmission line from the Wood
25 River substation, north along Highway 75, to an underground
COLBURN, DI 17
Idaho Power Company

1 transmission transition point near Elkhorn Road, and then
2 underground to the Ketchum substation. These proposed
3 facilities would follow the same path as the existing
4 distribution lines, replacing them and minimizing the
5 aesthetic impact. The route was economically equivalent to
6 the Company' s standard construction configuration and
7 therefore would not require any additional incremental cost
8 recovery from the local jurisdictions .
9 CPCN for the WRV Project
10 Q. You indicated Idaho Power had previously filed
11 a request for a CPCN for a new transmission line to serve
12 the North Valley area but withdrew the request. Did the
13 Company file a subsequent request for a CPCN following
14 community consensus on a feasible route that included Idaho
15 Power' s proposed solution that would not require
16 incremental cost recovery from local jurisdictions?
17 A. Yes . On November 8, 2016, the Company filed
18 Case No . IPC-E-16-28, requesting the Commission find that
19 the new 138-kV transmission line and related facilities to
20 provide redundant service from the Wood River substation
21 into the Ketchum substation was needed, and further
22 requesting the Commission grant a CPCN for construction of
23 the line as proposed and agreed upon by the local
24 jurisdictions . The Commission issued Order No. 33872 on
25 September 15, 2017, granting Idaho Power' s request for a
COLBURN, DI 18
Idaho Power Company

1 CPCN for a second 138-kV line, approving the requested
2 route of overhead transmission from the Wood River
3 substation to the transition point near Elkhorn Road, then
4 underground transmission to the Ketchum substation.
5 Q. At the time the CPCN was issued, had the
6 Company received the local permits necessary for
7 construction of the new 138-kV line?
8 A. No. Prior to the CPCN proceeding, Idaho Power
9 submitted an application for a Conditional Use Permit
10 ("CUP") to the Blaine County Board of Commissioners
11 ("County Board") , which was ultimately denied. Subsequent
12 to the issuance of the CPCN, the Company filed a new CUP
13 with the County Board to seek out a mutually acceptable
14 route configuration that was consistent with the CPCN route
15 and acceptable to Blaine County, with the opportunity to
16 mutually agree to certain micro-siting of facilities, and
17 for the County Board to request additional undergrounding
18 should it identify a method to fund the additional
19 incremental cost of such undergrounding.
20 Idaho Power then carried out extensive public
21 involvement and local permitting efforts relating to the
22 transmission line project and, although lengthy, ultimately
23 came to an agreement with the County Board on a line route
24 configuration, as well as a surcharge mechanism to fund the
25 incremental cost of additional undergrounding by Idaho
COLBURN, DI 19
Idaho Power Company

1 Power' s customers in Blaine County.
2 Final WRV Project Route Configuration
3 Q. What changes were made to the line route
4 configuration that required the establishment of a
5 surcharge mechanism?
6 A. Following filing of the new CUP application in
7 November 2017, Idaho Power worked with the Blaine County
8 Planning and Zoning ("P&Z") Commission, with engagement
9 from the County Board, and lengthy public hearing
10 processes, conducting extensive analysis of the micro-
11 siting options identified by the P&Z Commission. The CUP
12 application was approved on January 15, 2019, though no
13 specific route for the line was approved. While several
14 parties appealed this decision, the County Board ultimately
15 affirmed the P&Z Commission' s CUP grant on appeal, with the
16 condition that "the entire transmission line be
17 undergrounded from the Wood River Substation north to the
18 City of Ketchum.5 However, recognizing it could be difficult
19 to secure the required funding to bury the entire
20 transmission line, the decision left open the possible
21 consideration of "an overhead transmission line in this
22 area. "6
23 Securing funding to underground substantial portions
5 County Board's June 2019 Decision on Appeal.
6 Id.
COLBURN, DI 20
Idaho Power Company

1 of the line did prove difficult, although the County Board
2 explored a variety of options, including passing a bond or
3 government grants . The County Board, with consultation from
4 the P&Z Commission, prioritized portions of the line and
5 facilities for undergrounding. To cover the cost of the
6 incremental undergrounding, the County Board asked Idaho
7 Power to develop a surcharge mechanism that would be placed
8 on Blaine County customers' electric bills .
9 Ultimately the new line configuration, referred to
10 as the Owl Rock Road Route, was agreed upon by all parties
11 involved in the P&Z and CAC efforts, and included the
12 burial of: (1) an additional 1 . 4 miles of transmission,
13 located to the south from Elkhorn Road to near Owl Rock
14 Road, and (2) the existing distribution line for
15 approximately 8 miles along the planned route along
16 Buttercup Road to Highway 75 . The transmission line would
17 include overhead construction from the Wood River
18 substation to the underground transition point at Owl Rock
19 Road. Additionally, rather than place the existing
20 distribution lines as under-build on the new overhead
21 transmission structures, the existing distribution lines
22 along the route would be buried. This will both reduce the
23 height of the transmission poles and reduce the number of
24 lines in the air as the transmission line will have three
25 energized wires while the existing distribution line has
COLBURN, DI 21
Idaho Power Company

1 between three and six energized wires and one neutral wire .
2 Q. Did the County Board approve the CUP for the
3 Owl Rock Road Route?
4 A. Yes . On December 22, 2020, Idaho Power filed
5 an application to the County Board for CUP approval of the
6 Owl Rock Road Route funded by a surcharge mechanism to be
7 placed on Blaine County customers' electric bills . The
8 County Board approved the CUP for the Owl Rock Road Route
9 on March 9, 2021 . Under this CUP, the County Board modified
10 the "all underground" condition for the WRV Project and
11 replaced the language with a condition that the CUP was
12 contingent on partial undergrounding as decided on with the
13 Owl Rock Road Route. This final CUP from the County Board
14 gave Idaho Power authority to move forward with an
15 application with the Commission for approval of a modified
16 line route CPCN based on the Owl Rock Road Route, as well
17 as authority to develop a surcharge that would be used to
18 collect the incremental costs of undergrounding from Blaine
19 County customers .
20 Q. Please describe the intent of the surcharge
21 mechanism.
22 A. As I discussed earlier in my testimony, to
23 recover the incremental costs of undergrounding the section
24 of transmission and distribution lines prioritized by the
25 County Board, the Company was asked by the County Board to
COLBURN, DI 22
Idaho Power Company

1 develop a monthly surcharge to be applied to Idaho Power' s
2 Blaine County customers' bills over an estimated 20-year
3 period.
4 Q. Did the Company receive approval from the
5 Commission for the changes to the line route configuration
6 and resulting surcharge mechanism?
7 A. Yes . On June 28, 2022, in Case No . IPC-E-21-
8 25, the Commission issued Order No. 35452, finding the
9 modified line configuration for the WRV Project and
10 implementation of a surcharge mechanism were fair, just,
11 and reasonable.' The Commission issued an amended CPCN to
12 reflect the new line route configuration on August 2, 2022 .
13 Figure 1 below is the Owl Rock Road Route, identifying the
14 transmission line and line segments to be buried.
15
7 Case No. IPC-E-21-25, Order No. 35452 at 16 (June 28, 2022) .
COLBURN, DI 23
Idaho Power Company

1 FIGURE 1 - WRV PROJECT
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�Un6rurrrW DiurNvnw,OrerinaC Trammlwvr -
D.,.n.,e i.arer„sara
- 4iaMnt lnnuniuwn L.re
2
3 WRV Project Costs
4 Q. What is the status of the WRV Project?
5 A. In the fall of 2023, work began on the
6 distribution line portion of the WRV Project and continued
7 until the weather prohibited progress . Construction resumed
8 again in the spring of 2024 and work is anticipated to be
9 complete by November 2024 .
10 Q. The distribution undergrounding is a portion
11 of the broader WRV Project. What work is being completed in
12 November 2024?
COLBURN, DI 24
Idaho Power Company

1 A. Work on the WRV Project began with the
2 undergrounding of approximately eight miles of the existing
3 distribution line along Buttercup Road and Highway 75, to
4 allow the future transmission line to be built with shorter
5 transmission poles to meet county height requirements . To
6 prepare for undergrounding of the distribution line, crews
7 first excavated a duct bank and made multiple bores along
8 the eight-mile route. Next, the distribution line is
9 installed in the duct bank and equipment is installed to
10 connect existing customers .
11 Q. Has Idaho Power included the costs associated
12 with the distribution line portion of the WRV Project,
13 which is anticipated to be completed in November 2024, in
14 the Company' s request in this case?
15 A. Yes . However, the Company has reduced the
16 total project costs by the estimated incremental
17 undergrounding costs of distribution, as those costs will
18 be recovered from Idaho Power' s Blaine County customers
19 only through the surcharge mechanism. Concurrent with the
20 Company' s request in this proceeding, Idaho Power is making
21 a compliance filing in Case No. IPC-E-24-228 to update the
22 distribution portion of the surcharge approved with Order
8 In the Matter of Idaho Power Company's Compliance Filing to Update the
Customer Surcharge to Collect Incremental Costs of Distribution
Undergrounding of the New 138 KV Transmission Line in the Wood River
Valley and Establish Necessary Regulatory Accounting Treatment.
COLBURN, DI 25
Idaho Power Company

1 No . 35452, effective the month following the month of line
2 energization.
3 Q. You indicated the Company reduced the WRV
4 Project costs associated with the distribution line
5 included in Idaho Power' s request in this case by an
6 estimate of the incremental undergrounding costs . Why was
7 an estimate used as opposed to actual costs?
8 A. Order No. 35452 acknowledged the Company' s
9 methodology for computing the estimated incremental
10 grounding costs . Because the distribution line
11 configuration Idaho Power would have constructed under a
12 standard construction configuration was not built, the
13 Company cannot identify the precise costs it would have
14 incurred under the hypothetical scenario. That is, the
15 request for proposals issued for the work to be performed
16 or materials to be procured was based on a different
17 distribution line configuration and therefore Idaho Power
18 cannot compute with certainty the portion of the costs that
19 would have been incurred under a different distribution
20 line configuration.
21 Q. How did Idaho Power develop the incremental
22 cost estimate?
23 A. To estimate the incremental costs associated
24 with the modified distribution line configuration, the
25 Company built a cost estimate associated with a comparable
COLBURN, DI 26
Idaho Power Company

1 overhead distribution line rebuild with a standard
2 construction configuration which entails replacement of all
3 distribution line equipment, including overhead wires and
4 pole mounted equipment, except for most of the distribution
5 poles . Costs were added to reflect: (1) the overhead
6 distribution work being performed on an energized system,
7 (2) the replacement of a portion of the existing wood poles
8 with taller, steel poles as required by the line design,
9 and (3) the addition of distribution intersect poles that
10 would have been required for the distribution under-build.
11 Finally, Allowance for Funds Used During Construction,
12 overheads, and a contingency were applied to the total
13 project costs as is standard when developing a project cost
14 estimate.
15 Q. What are the WRV Project costs included in the
16 Company' s request in this case?
17 A. Net WRV Project costs of $11 . 8 million are
18 included for recovery in this case from all customers,
19 which reflects the estimated costs associated with the
20 distribution portion of the WRV Project less the amount
21 being recovered through the separate WRV Project surcharge .
22 V. GRID MODERNIZATION INVESTMENT
23 Q. Please describe the grid modernization
24 initiative .
25 A. The grid modernization initiative is a set of
COLBURN, DI 27
Idaho Power Company

1 multi-year projects designed to maintain and improve
2 reliability on the Company' s electrical grid. This suite of
3 projects replaces and modernizes equipment nearing its end
4 of life and updates the Company' s system with modern
5 technology to enhance reliability while keeping costs low.
6 Q. What was the grid modernization initiative
7 project identified as a major project and included in Idaho
8 Power' s request in this case?
9 A. Work on the first phase of the single vendor
10 platform project under the Company' s grid modernization
11 initiative will be completed and placed in service in 2024 .
12 Idaho Power currently leverages three stand-alone grid
13 control systems for managing the bulk electric system,
14 optimizing distribution assets, and responding to customer
15 outages . The systems are the (1) Energy Management
16 ("EMS") /Supervisory Control and Data Acquisition ("SCADA")
17 system, (2) Outage Management System ("OMS") , and
18 Integrated Volt/Var Control, a Distribution Management
19 System ("DMS") . Because these systems are independent, they
20 require three sets of hardware, three network models, three
21 support organizations, and complex integrations between the
22 systems . The single vendor platform initiative replaces
23 these numerous vendor solutions, consolidating the EMS,
24 OMS, and DMS into a single vendor platform.
25 Q. What are the benefits of a single vendor
COLBURN, DI 28
Idaho Power Company

1 platform?
2 A. The Company' s investments in distribution
3 management technologies as part of grid modernization are
4 laying a foundation for an Advanced DMS platform. An
5 Advanced DMS will provide significant enhancements in
6 modeling, control, and system awareness needed to support
7 the grid, providing real-time load flow and new advanced
8 applications such as fault locating, isolation and system
9 restoration, enhanced switch order management, and
10 Distributed Energy Resource Management tools . The real-time
11 load flow and distributed energy resource awareness will
12 improve Idaho Power' s operational visibility into the
13 distribution network and provide more direct control to
14 operators, improving reliability for customers and
15 increasing the Company' s ability to effectively manage
16 additional distributed generation, which is necessary with
17 the growth of distributed energy resources . The single
18 vendor platform specifically will reduce costs, allow the
19 Company to consolidate knowledge and resources, and
20 increase overall reliability.
21 Q. What is the first phase of the single vendor
22 platform project that will be completed and placed in
23 service in 2024?
24 A. The first phase of the single vendor platform
25 project, which is anticipated to be placed in service in
COLBURN, DI 29
Idaho Power Company

1 October 2024, is associated with the EMS/SCADA system. The
2 EMS/SCADA system monitors and controls transmission and
3 generation assets as well as distribution feeder relays .
4 During the first phase of the project, Idaho Power set up
5 an EMS/SCADA system to replace the existing EMS system, and
6 also set up a base SCADA model, providing a foundation for
7 subsequent phases of the single vendor platform project to
8 be built. The Company has included the approximately $11 . 6
9 million investment in the revenue requirement request in
10 this case.
11 Q. Does the EMS/SCADA system portion of the
12 single vendor platform project demonstrate a prudent
13 approach to investment in the Company' s system?
14 A. Yes . The replacement and modernization of
15 equipment is necessary to maintain and improve reliability
16 on the Company' s electrical grid.
17 VI . CONCLUSION
18 Q. Please summarize your testimony.
19 A. As evidenced by the continued growth in
20 transmission and distribution investments, the Company
21 continues its thoughtful and prudent approach to
22 construction and maintenance of its transmission and
23 distribution systems to ensure Idaho Power maintains a safe
24 and reliable system, while also making great strides to
25 mitigate wildfire risk.
COLBURN, DI 30
Idaho Power Company

1 Q. Does this conclude your direct testimony in
2 this case?
3 A. Yes, it does .
4
5
COLBURN, DI 31
Idaho Power Company

1 DECLARATION OF MITCH COLBURN
2 I, Mitch Colburn, declare under penalty of perjury
3 under the laws of the state of Idaho:
4 1 . My name is Mitch Colburn. I am employed by
5 Idaho Power Company as the Vice President of Planning,
6 Engineering, and Construction.
7 2 . On behalf of Idaho Power, I present this
8 pre-filed direct testimony in this matter.
9 3 . To the best of my knowledge, my pre-filed
10 direct testimony is true and accurate.
11 I hereby declare that the above statement is true to
12 the best of my knowledge and belief, and that I understand
13 it is made for use as evidence before the Idaho Public
14 Utilities Commission and is subject to penalty for perjury.
15 SIGNED this 31st day of May 2024, at Boise, Idaho.
16
17 Signed
18 MITCH COLBURN
19
20
21
22
23
24
COLBURN, DI 32
Idaho Power Company

74,
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Idaho P`6wer.;----.--F
Files Limited
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I • I •
Idaho Power has filed a limited scope rate case with the
Idaho Public Utilities Commission (IPUC)requesting an
overall base rate increase of$99.29 million, or 7.31%for
Idaho customers.The IPUC will evaluate this request over
the next several months,and any resulting changes will
not take effect until January 2025 or later.
Idaho Power's request only focuses on recovering
costs associated with infrastructure investments and
labor expenses that were not included for collection
in the company's last rate case but will be benefitting
customers by year-end 2024.The goal of filing a limited
case is to balance timely cost recovery with customer
affordability and reliability. Idaho Power plans to invest
nearly$1 billion in its electrical grid in 2024 and an
average of nearly$800 million annually over the next five
years to meet growing customer demand and maintain a
safe, reliable electrical system.
Idaho Power is sensitive to the impact rate increases
have on customers and believes this limited case will
minimize customer impact as compared to a broader
general rate review. Idaho Power remains committed to
affordability,with prices 20%to 30% lower than the
national average. For customers who may be struggling
to pay their bill, Idaho Power has tools, programs, and
resources available at idahopower.com/accounts-service/
make-payment/help paying-bill/idaho-assistance.
1�

-�IQAHO P041VER,,
If this request is approved as filed,the average Idaho
residential customer using 950 kilowatt hours per
month would see a monthly bill increase of about$7.48.
Proposed impacts for all Idaho customers are shown
in the table below.Actual percentages will depend on
a customer's classification,the rate they pay, and the
final decision by the IPUC. Oregon customers are not
impacted by this filing.
Limited Scope Rate Request
Percentage Change from Current Base Revenue
Small General Large General
Residential Service Service, Large Power, Irrigation
7.25% 7.30% 6.83% 6.50% 9.50%
Includes lighting schedules; ,Includes special contracts
Opportunities for Public Review
Idaho Power's proposal is subject to public review and
approval by the IPUC. Copies of the application, direct
filed testimonies, and exhibits are available to the public
at the IPUC offices(11331 W. Chinden Blvd. Building 8,
Suite 201-A, Boise, ID 83714), Idaho Power offices, or
at idahopower.com or puc.idaho.gov. Customers also
may subscribe to the IPUC's RSS feed to receive periodic
updates via email about the case.Written comments
regarding Idaho Power's proposal may be filed with
the IPUC. Visit puc.idaho.gov/Form/CaseComment and
reference Case No. IPC-E-24-07 or mail to PO Box 83720,
Boise ID, 83720.
:< u
*Printed on recycled paper. 02024 Idaho Power 31180-1-0280

N ews Re I ea se 1D�H0�POM�R_�
Idaho Power Files Limited Rate Case in Idaho
May 31, 2024
BOISE, Idaho — Idaho Power has filed a limited scope rate case with the Idaho Public Utilities
Commission (IPUC) requesting an overall base rate increase of$99.29 million, or 7.31%for Idaho
customers.The IPUC will evaluate this request over the next several months, and any resulting changes
will not take effect until January 2025 or later.
Idaho Power's request only focuses on recovering costs associated with infrastructure investments and
labor expenses that were not included for collection in the company's last rate case but will be
benefitting customers by year-end 2024. The goal of filing a limited case is to balance timely cost
recovery with customer affordability and reliability. Idaho Power plans to invest nearly$1 billion in its
electrical grid in 2024 and an average of nearly$800 million annually over the next five years to meet
growing customer demand and maintain a safe, reliable electrical system.
Idaho Power is sensitive to the impact rate increases have on customers and believes this limited case
will minimize customer impact as compared to a broader general rate review. Idaho Power remains
committed to affordability, with prices 20%to 30% lower than the national average. For customers who
may be struggling to pay their bill, Idaho Power has tools, programs, and resources available at
idahopower.com/accounts-service/make-payment/help-paying-bill/idaho-assistance.
If this request is approved as filed,the average Idaho residential customer using 950 kilowatt hours per
month would see a monthly bill increase of about$7.48. Proposed impacts for all Idaho customers are
shown in the table below.Actual percentages will depend on a customer's classification,the rate they
pay, and the final decision by the IPUC. Oregon customers are not impacted by this filing.
Limited Scope Rate Request
Percentage Change from Current Base Revenue
Residential Small General Service Large General Service 1 Large Power 2 Irrigation
7.25% 7.30% 6.83% 6.50% 9.50%
1 Includes lighting schedules; 2 Includes special contracts
Opportunities for Public Review
Idaho Power's proposal is subject to public review and approval by the IPUC. Copies of the application,
direct filed testimonies, and exhibits are available to the public at the IPUC offices (11331 W. Chinden
Blvd. Building 8, Suite 201-A, Boise, ID 83714), Idaho Power offices, or at idahopower.com or
puc.idaho.gov. Customers also may subscribe to the IPUC's RSS feed to receive periodic updates via
email about the case. Written comments regarding Idaho Power's proposal may be filed with the IPUC.

Visit puc.idaho.gov/Form/CaseComment and reference Case No. IPC-E-24-07 or mail to PO Box 83720,
Boise ID, 83720.
About Idaho Power
Idaho Power, headquartered in vibrant and fast-growing Boise, Idaho, has been a locally operated
energy company since 1916.Today, it serves a 24,000-square-mile area in Idaho and Oregon.
The company's goal to provide 100%clean energy by 2045 builds on its long history as a clean-energy
leader that provides reliable service at affordable prices. With 17 low-cost hydroelectric projects at the
core of its diverse energy mix, Idaho Power's residential, business and agricultural customers pay among
the nation's lowest prices for electricity. Its 2,100 employees proudly serve more than
630,000 customers with a culture of safety first, integrity always and respect for all.
IDACORP Inc. (NYSE: IDA), Idaho Power's independent publicly traded parent company, is also
headquartered in Boise, Idaho. To learn more,visit idahopower.com or idacorpinc.com.
Jordan Rodriguez
Communications Specialist
[e-mail]
208-388-2460

Gust, Stacy
From: Gust, Stacy
Sent: Friday, May 31, 2024 2:31 PM
To: 'Monica Barrios-Sanchez'
Cc: Nordstrom, Lisa
Subject: IPC-E-24-07 - Application of Idaho Power Company for Authority to Increase Rates for
Electric Service to Recover Costs Associated with Incremental Capital Investments and
Certain Ongoing Operations and Maintenance Expenses - Workpapers
Attachments: LARKIN Workpaper 1 -Accumulated Reserve.pdf, LARKIN Workpaper 2 - Depreciation
and Amortization Expense.pdf; LARKIN Workpaper 3 - Incremental Plant
Determination.pdf; LARKIN Workpaper 4 - Interest Sync.pdf; LARKIN Workpaper 5 -
O&M Labor.pdf, LARKIN Workpaper 6 - Results of Operations Model.pdf; LARKIN
Workpaper 7 - Revenue Growth Offset.pdf; LARKIN Workpaper 8 - Taxes.pdf
Ms. Barrios-Sanchez,
Please find attached the workpapers in regard to the above matter.
Thank you.
Stacy Gust
Regulatory Administrative Assistant
Idaho Power I Regulatory Affairs
Office 208-388-5749
[e-mail]
1

IDAHO POWER COMPANY
Depreciation and Amortization Expense
Actuals for December 31,2023 thru January 31,2024
Estimated February thru December 2024
January 2024
Expense
Adj Plant Balance Actuals Adj'd Exp Adjusted Accrual Monthly Reserve Plant Bal Expense
ACCT ACCOUNT DESCRIPTION @ 12/31/2023 12/31/23 Bridger Coal Exp Valmy Exp 12/31/23 Expense Bridger Exp Coal Valmy Exp Expense Rate Adj 1/31/2024 2/28/2024
302 Franchises and Consents 54,064,548.50 1,435,591.45 1,435,591.45 123,345.65 0.00 0.00 123,345.65 2.73 54,081,603.40 123,035.65
3031 Miscellaneous Intangible Plant 61 504 910.47 4,758,363.59 4,758,363.59 472,420.58 0.00 0.00 472,420.58 8.46 61,509,539.34 433,642.25
Total Amortization Expense 115,569,458.97 6,193,955.04 0.00 0.00 6,193,955.04 595,766.23 0.00 0.00 595,766.23 0.00 115,591,142.74 556,677.90
310 Land and Land Rights 148,899.77 28,167.53 (740.05) (25,045.08) 2,382.40 3,068.78 (133.98) (2,736.27) 198.53 1.60 148,899.77 198.53
311 Structures and Improvements 37,303,704.94 4,165,003.06 (609,794.14) (2,994,838.69) 560,370.23 338,776.96 (85,572.92) (200,667.99) 52,536.05 1.69 37,303,704.94 52,536.05
312 Boiler Plant Equipment 185,403,956.25 33,254,136.15 (15,752,906.60) (11,454,682.02) 6,046,547.53 3,941,859.35 (2,548,405.17) (827,972.11) 565,482.07 3.66 185,403,956.25 565,482.07
314 Turbogenerator Units 56,378,666.21 7,848,851.40 (2,354,433.92) (3,637,352.18) 1,857,065.30 853,725.05 (346,982.10) (298,611.71) 208,131.24 4.43 56,378,666.21 208,131.24
315 Accessory electric Equipment 16,473,701.28 2,322,669.34 (422,340.31) (1,681,377.65) 218,951.38 194,299.22 (55,133.64) (117,475.21) 21,690.37 1.58 16,473,701.28 21,690.37
316 Misc Power Plant Equipment 8,423,945.60 1,432,071.43 355,519.62 745,534.67 331,017.14 139,608.37 58,627.98 53,672.77 27,307.62 3.89 8,423,945.60 27,307.62
TOTAL STEAM PRODUCTION PLANT 304,132,874.05 49,050,898.91 19,495,734.65 20,538,830.29 9,016,333.97 5,471,337.73 3,094,855.79 1,501,136.06 875,345.88 0.00 304,132,874.05 875,345.88
331 Structures and Improvements 268,903,107.87 5,172,365.75 5,172,365.75 451,554.39 0.00 0.00 451,554.39 2.11 268,915,952.17 472,843.88
332 Reservoirs,Dams,Waterways 312,287,739.29 5,202,353.69 5,202,353.69 444,087.83 0.00 0.00 444,087.83 1.69 312,301,787.62 439,825.02
333 Waterwheel,Turbines,Generato 398,767,042.05 10,871,076.00 10,871,076.00 988,437.12 0.00 0.00 988,437.12 2.84 398,744,745.62 943,695.90
334 Accessory Electric Equipment 76,190,449.29 2,472,200.97 2,472,200.97 214,259.05 0.00 0.00 214,259.05 3.34 76,108,899.93 211,836.44
335 Misc Power Plant Equipment 33,078,416.73 951,964.50 951,964.50 81,392.16 0.00 0.00 81,392.16 2.95 33,114,816.45 81,407.26
3361 Roads,Railroads and Bridges 19 342 200.77 650,147.62 650,147.62 59,988.06 0.00 0.00 59,988.06 3.52 19,405,886.63 56,923.93
TOTAL HYDRO PRODUCTION PLANT 1,108,568,956.00 25,320,108.53 0.00 0.00 25,320,108.53 2,239,718.61 0.00 0.00 2,239,718.61 0.00 1,108,592,088.42 2,206,532.43
341 Structures and Improvements 154,940,383.08 4,006,984.08 4,006,984.08 334,339.54 0.00 0.00 334,339.54 2.59 154,968,517.17 334,473.72
342 Fuel Holders,Producers,Acces 10,438,247.49 277,475.11 277,475.11 23,122.93 0.00 0.00 23,122.93 2.66 10,438,247.49 23,138.12
343 Prime Movers 294,719,247.73 10,486,103.10 10,486,103.10 959,190.17 0.00 0.00 959,190.17 3.85 294,495,853.26 944,840.86
344 Generators 72,448,963.87 1,592,364.64 1,592,364.64 146,014.02 0.00 0.00 146,014.02 2.39 67,666,380.45 134,768.87
345 Accessory Electric Equipment 93,819,601.05 2,726,339.37 2,726,339.37 227,344.85 0.00 0.00 227,344.85 2.91 93,824,159.03 227,523.59
346 Misc Power Plant Equipment 7,774,242.07 224,752.02 224,752.02 20,382.53 0.00 0.00 20,382.53 3.18 7,774,242.07 20,601.74
TOTAL OTHER PRODUCTION PLANT 634,140,685.29 19,314,018.32 0.00 0.00 19,314,018.32 1,710,394.04 0.00 0.00 1,710,394.04 0.00 629,167,399.47 1,685,346.90
350.2 Land Rights&Easements 37,340,279.85 405,311.07 405,311.07 34,228.59 0.00 0.00 34,228.59 1.10 37,386,633.86 34,271.08
350.22 Transm-ROW Renewal Cost 1,321,169.55 10,518.45 10,518.45 3,666.25 0.00 0.00 3,666.25 3.33 1,321,287.49 3,666.57
352 Structures and Improvements 105,772,696.00 1,954,692.03 (2,630.95) (14,906.38) 1,937,154.70 168,936.76 (476.50) (991.84) 167,468.42 1.90 106,327,945.16 168,352.58
353 Station Equipment 484,276,729.43 10,755,730.74 (225,811.89) (311,293.69) 10,218,625.16 940,230.52 (40,222.43) (21,916.62) 878,091.47 2.18 490,351,466.19 890,805.16
354 Towers and Fixtures 232,601,840.66 2,792,926.96 2,792,926.96 232,601.84 0.00 0.00 232,601.84 1.20 232,900,157.89 232,900.16
355 Poles and Fixtures 245,301,825.40 6,050,395.37 6,050,395.37 525,950.04 0.00 0.00 525,950.04 2.56 246,242,463.18 525,317.25
356 Overhead Conductors,Devices 271,536,308.82 4,005,706.45 4,005,706.45 337,157.58 0.00 0.00 337,157.58 1.49 271,953,139.11 337,675.15
3591 Roads and Trails 405,090.98 2,692.84 2,692.84 232.93 0.00 0.00 232.93 0.69 405,090.98 232.93
TOTAL TRANSMISSION PLANT 1,378,555,940.69 25,977,973.91 228,442.84 326,200.07 25,423,331.00 2,243,004.51 40,698.93 22,908.46 2,179,397.12 0.00 1,386,888,183.86 2,193,220.88
360 Distr-ROW Renewal Cost 873,576.40 29,090.09 29,090.09 2,424.17 0.00 0.00 2,424.17 3.33 873,576.40 2,424.17
361 Structures and improvements 66,084,348.25 1,326,156.77 1,326,156.77 117,850.42 0.00 0.00 117,850.42 2.14 65,769,271.76 117,288.53
362 Station Equipment 338,795,158.69 6,333,752.59 6,333,752.59 536,425.67 0.00 0.00 536,425.67 1.90 338,554,483.13 536,044.60
TOTAL SUBSTATION EQUIPMENT 405,753,083.34 7,688,999.45 0.00 0.00 7,688,999.45 656,700.26 0.00 0.00 656,700.26 0.00 405,197,331.29 655,757.30
3631 Battery Storage 140,772,713.34 2,244,321.74 2,244,321.74 586,219.09 0.00 0.00 586,219.09 5.00 141,129,691.06 588,040.38
TOTAL BATTERY STORAGE 140,772,713.34 2,244,321.74 0.00 0.00 2,244,321.74 586,219.09 0.00 0.00 586,219.09 0.00 141,129,691.06 588,040.38
364 Poles,Towers and Fixtures 344,304,526.41 6,442,765.12 6,442,765.12 570,649.36 0.00 0.00 570,649.36 1.95 344,445,238.20 559,723.51
365 Overhead Conductors,Devices 165,014,147.73 3,587,925.38 3,587,925.38 306,651.29 0.00 0.00 306,651.29 2.23 165,084,686.23 306,782.38
366 Underground Conduit 57,714,926.36 1,306,133.57 1,306,133.57 113,986.98 0.00 0.00 113,986.98 2.37 56,649,590.49 111,882.94
367 Underground Conductors,Device 351,104,223.52 7,626,874.75 7,626,874.75 664,172.16 0.00 0.00 664,172.16 2.27 349,826,321.69 661,754.79
368 Line Transformers 777,303,575.61 14,291,907.73 14,291,907.73 1,243,685.72 0.00 0.00 1,243,685.72 1.92 780,382,163.88 1,248,611.46
369 Services 72,438,102.73 1,167,405.11 1,167,405.11 100,206.03 0.00 0.00 100,206.03 1.66 72,731,928.71 100,612.50
37000 Meters 19,630,358.60 660,686.09 660,686.09 56,437.28 0.00 0.00 56,437.28 3.45 19,653,077.33 56,502.60
37010 Meters-AMI 99,291,362.59 5,066,436.06 5,066,436.06 434,399.71 0.00 0.00 434,399.71 5.25 99,864,308.97 436,906.35
371 Installations,Cust Premises 5,844,012.79 217,332.81 217,332.81 20,259.24 0.00 0.00 20,259.24 4.16 5,878,271.72 20,378.01
373 Street Lighting,Signal System 7,085,273.43 224,904.66 224,904.66 19,602.59 0.00 0.00 19,602.59 3.32 7,129,856.86 19,725.94
TOTAL DISTRIBUTION LINES 1,899,730,509.77 40,592,371.28 0.00 0.00 40,592,371.28 3,530,050.36 0.00 0.00 3,530,050.36 0.00 1,901,645,444.08 3,522,880.48
390 Structures and Improvements 178,408,553.24 3,293,855.19 3,293,855.19 301,402.60 0.00 0.00 301,402.60 2.08 179,253,121.31 310,705.41
391 Office Furniture,Equipment 42,146,172.99 6,891,212.22 6,891,212.22 588,372.19 0.00 0.00 588,372.19 14.88 66,586.76 40,492,650.35 568,695.62
392 Transportation Equipment 131,015,979.11 6,035,215.25 6,035,215.25 538,942.96 0.00 0.00 538,942.96 4.90 132,549,698.63 541,244.60
393 Stores Equipment 7,753,504.48 220,416.72 220,416.72 25,582.30 0.00 0.00 25,582.30 4.00 (262.72) 7,620,557.52 25,139.14
394 Tools,Shop,Garage Equipment 15,757,638.34 795,511.33 795,511.33 68,227.43 0.00 0.00 68,227.43 5.00 2,570.60 15,808,534.88 68,439.50
395 Laboratory Equipment 16,451,896.00 819,640.63 819,640.63 70,995.07 0.00 0.00 70,995.07 5.00 2,445.50 16,457,035.15 71,016.48
396 Power Operated Equipment 31,332,414.44 910,732.74 910,732.74 83,814.21 0.00 0.00 83,814.21 3.21 31,473,283.03 84,191.03
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 1 of 12
Accumulated Reserve
\\fillmore\RegAdmin\2024 Idaho General Rate Case\Workpapers\Larkin\LARKIN Workpaper 1 -Accumulated Reserve.xlsx; Expense

January 2024
Expense
Adj Plant Balance Actuals Adj'd Exp Adjusted Accrual Monthly Reserve Plant Bal Expense
ACCT ACCOUNT DESCRIPTION @ 12/31/2023 12/31/23 Bridger Coal Exp Valmy Exp 12/31/23 Expense Bridger Exp Coal Valmy Exp Expense Rate Adj 1/31/2024 2/28/2024
397 Communication Equipment 81,680,577.28 5,401,103.11 5,401,103.11 452,345.04 0.00 0.00 452,345.04 6.53 5,890.11 82,024,277.83 452,238.89
398 Miscellaneous Equipment 10,914,929.39 798,192.98 798,192.98 66,218.52 0.00 0.00 66,218.52 6.67 5,549.70 10,910,725.11 66,195.15
TOTAL GENERAL EQUIPMENT PLANT 515,461,665.27 25,165,880.17 0.00 0.00 25,165,880.17 2,195,900.32 0.00 0.00 2,195,900.32 82,779.95 516,589,883.81 2,187,865.82
Depreciation and Amortization Exp 6,502,685,886.72 201,548,527.35 19,724,177.48 20,865,030.36 160,959,319.51 19,229,091.15 3,135,554.72 1,524,044.52 14,569,491.91 82,779.95 6,508,934,038.78 14,471,667.97
Depreciation Expense on Disallowed Costs 296 299.32 296 299.32 24 691.61 24 691.61 24 691.61
201 252 228.03 19 724 177.48 20 865 030.36 160 663 020.19 19 204 399.54 3 135 554.72 1 524 044.52 14 544 800.30 82 779.95 6 508 934 038.78 14 446 976.36
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 2 of 12
Accumulated Reserve
Willmore\RegAdmin\2024 Idaho General Rate Case\Workpapers\Larkin\LARKIN Workpaper 1 -Accumulated Reserve.xlsx; Expense

IDAHO POWER COMPANY
Depreciation and Amortization Expense
Actuals for December 31,2023 thru January
Estimated February thru December 2024
Plant Bal Expense Plant Bal Expense Plant Bal Expense Plant Bal Expense Plant Bal Expense Plant Bal Expense Plant Bal
ACCT ACCOUNT DESCRIPTION 2/28/24 3/31/2024 3/31124 4/30/2024 4/30/24 5/31/2024 5/31/24 6/30/2024 6/30/24 7/31/2024 7131124 8/31/2024 8/31/24
302 Franchises and Consents 54,603,068.62 124,221.98 54,945,539.39 125,001.10 54,973,604.61 125,064.95 55,148,019.65 125,461.74 55,474,741.78 126,205.04 55,832,325.32 127,018.54 55,928,500.62
3031 Miscellaneous Intangible Plant 61,727,710.34 435,180.36 62,377,290.34 439,759.90 62,595,772.15 441,300.19 62,716,944.15 442,154.46 63,438,276.56 447,239.85 63,496,891.56 447,653.09 63,655,798.56
Total Amortization Expense 116,330,778.96 559,402.34 117,322,829.73 564,761.00 117,569,376.76 566,365.14 117,864,963.80 567,616.20 118,913,018.34 573,444.89 119,329,216.88 574,671.63 119,584,299.18
310 Land and Land Rights 148,899.77 198.53 148,899.77 198.53 148,899.77 198.53 148,899.77 198.53 148,899.77 198.53 148,899.77 198.53 148,899.77
311 Structures and Improvements 37,303,704.94 52,536.05 37,303,704.94 52,536.05 37,303,704.94 52,536.05 37,303,704.94 52,536.05 37,303,704.94 52,536.05 37,303,704.94 52,536.05 37,303,704.94
312 Boiler Plant Equipment 185,403,956.25 565,482.07 185,403,956.25 565,482.07 185,403,956.25 565,482.07 185,403,956.25 565,482.07 185,403,956.25 565,482.07 185,403,956.25 565,482.07 185,403,956.25
314 Turbogenerator Units 56,378,666.21 208,131.24 56,378,666.21 208,131.24 56,378,666.21 208,131.24 56,378,666.21 208,131.24 56,378,666.21 208,131.24 56,378,666.21 208,131.24 56,378,666.21
315 Accessory electric Equipment 16,473,701.28 21,690.37 16,473,701.28 21,690.37 16,473,701.28 21,690.37 16,473,701.28 21,690.37 16,473,701.28 21,690.37 16,473,701.28 21,690.37 16,473,701.28
316 Misc Power Plant Equipment 8,423,945.60 27,307.62 8,423,945.60 27,307.62 8,423,945.60 27,307.62 8,423,945.60 27,307.62 8,423,945.60 27,307.62 8,423,945.60 27,307.62 8,423,945.60
TOTAL STEAM PRODUCTION PLANT 304,132,874.05 875,345.88 304,132,874.05 875,345.88 304,132,874.05 875,345.88 304,132,874.05 875,345.88 304,132,874.05 875,345.88 304,132,874.05 875,345.88 304,132,874.05
331 Structures and Improvements 270,058,586.02 474,853.01 271,229,630.85 476,912.10 271,679,453.19 477,703.04 272,752,544.90 479,589.89 273,897,297.42 481,602.75 274,948,461.53 483,451.04 275,243,147.58
332 Reservoirs,Dams,Waterways 312,522,767.11 440,136.23 313,047,532.44 440,875.27 313,409,912.81 441,385.63 314,107,414.93 442,367.94 314,632,922.02 443,108.03 315,026,003.80 443,661.62 315,142,526.73
333 Waterwheel,Turbines,Generato 399,914,020.52 946,463.18 402,908,876.74 953,551.01 405,027,750.19 958,565.68 409,076,795.93 968,148.42 412,079,838.16 975,255.62 414,298,564.27 980,506.60 414,958,663.20
334 Accessory Electric Equipment 76,208,284.11 212,113.06 76,462,836.18 212,821.56 76,642,932.85 213,322.83 76,987,087.25 214,280.73 77,242,335.10 214,991.17 77,430,918.89 215,516.06 77,487,024.93
335 Misc Power Plant Equipment 33,162,363.15 81,524.14 33,274,541.67 81,799.91 33,351,837.09 81,989.93 33,500,712.02 82,355.92 33,613,035.85 82,632.05 33,697,147.07 82,838.82 33,722,072.49
336 Roads,Railroads and Bridges 19,457,383.70 57,074.99 19,542,892.97 57,325.82 19,593,384.34 57,473.93 19,695,512.23 57,773.50 19,780,475.89 58,022.73 19,848,676.57 58,222.78 19,868,490.21
TOTAL HYDRO PRODUCTION PLANT 1,111,323,404.61 2,212,164.61 1,116,466,310.85 2,223,285.67 1,119,705,270.46 2,230,441.04 1,126,120,067.27 2,244,516.40 1,131,245,904.44 2,255,612.35 1,135,249,772.13 2,264,196.92 1,136,421,925.14
341 Structures and Improvements 154,979,451.83 334,497.32 155,240,777.11 335,061.34 155,287,341.96 335,161.85 155,327,095.30 335,247.65 156,065,285.16 336,840.91 156,258,459.53 337,257.84 156,325,482.21
342 Fuel Holders,Producers,Acces 10,438,142.08 23,137.88 10,435,623.00 23,132.30 10,435,174.13 23,131.30 10,434,790.92 23,130.45 10,427,675.01 23,114.68 10,425,812.88 23,110.55 10,425,166.80
343 Prime Movers 294,490,929.71 944,825.07 294,373,262.70 944,447.55 294,352,295.93 944,380.28 294,334,396.18 944,322.85 294,002,011.22 943,256.45 293,915,030.54 942,977.39 293,884,852.22
344 Generators 67,666,536.04 134,769.18 67,670,254.37 134,776.59 67,670,916.93 134,777.91 67,671,482.57 134,779.04 67,681,986.09 134,799.96 67,684,734.72 134,805.43 67,685,688.37
345 Accessory Electric Equipment 93,825,667.44 227,527.24 93,861,716.71 227,614.66 93,868,140.23 227,630.24 93,873,624.12 227,643.54 93,975,455.85 227,890.48 94,002,103.84 227,955.10 94,011,349.48
346 Misc Power Plant Equipment 7,775,274.16 20,604.48 7,799,939.86 20,669.84 7,804,334.98 20,681.49 7,808,087.18 20,691.43 7,877,762.69 20,876.07 7,895,995.84 20,924.39 7,902,321.91
TOTAL OTHER PRODUCTION PLANT 629,176,001.26 1,685,361.17 629,381,573.75 1,685,702.28 629,418,204.16 1,685,763.07 629,449,476.27 1,685,814.96 630,030,176.02 1,686,778.55 630,182,137.35 1,687,030.70 630,234,860.99
350.2 Land Rights&Easements 37,425,933.95 34,307.11 37,555,498.31 34,425.87 37,622,176.22 34,486.99 37,649,520.41 34,512.06 37,801,246.15 34,651.14 37,821,350.81 34,669.57 37,860,172.56
350.22 Transm-ROW Renewal Cost 1,322,938.75 3,671.16 1,328,382.60 3,686.26 1,331,184.18 3,694.04 1,332,333.09 3,697.22 1,338,708.09 3,714.91 1,339,552.82 3,717.26 1,341,183.98
352 Structures and Improvements 106,772,125.44 169,055.87 106,956,795.82 169,348.26 107,233,952.06 169,787.09 107,320,691.61 169,924.43 107,514,994.72 170,232.07 107,517,630.86 170,236.25 107,599,272.40
353 Station Equipment 492,648,740.92 894,978.55 493,847,208.78 897,155.76 495,325,420.92 899,841.18 495,807,167.84 900,716.35 497,126,781.23 903,113.65 497,187,256.83 903,223.52 497,663,455.18
354 Towers and Fixtures 233,377,526.05 233,377.53 234,951,311.51 234,951.31 235,761,231.12 235,761.23 236,093,374.15 236,093.37 237,936,348.18 237,936.35 238,180,554.38 238,180.55 238,652,112.35
355 Poles and Fixtures 246,811,440.87 526,531.07 248,687,244.24 530,532.79 249,652,591.79 532,592.20 250,048,474.86 533,436.75 252,245,125.55 538,122.93 252,536,196.22 538,743.89 253,098,248.72
356 Overhead Conductors,Devices 272,425,167.20 338,261.25 273,981,347.52 340,193.51 274,782,206.98 341,187.91 275,110,634.50 341,595.70 276,932,992.13 343,858.47 277,174,466.51 344,158.30 277,640,749.41
3591 Roads and Trails 405,090.98 232.93 405,090.98 232.93 405,090.98 232.93 405,090.98 232.93 405,090.98 232.93 405,090.98 232.93 405,090.98
TOTAL TRANSMISSION PLANT 1,391,188,964.15 2,200,415.47 1,397,712,879.76 2,210,526.69 1,402,113,854.25 2,217,583.57 1,403,767,287.43 2,220,208.81 1,411,301,287.03 2,231,862.45 1,412,162,099.41 2,233,162.27 1,414,260,285.58
360 Distr-ROW Renewal Cost 873,576.40 2,424.17 873,576.40 2,424.17 873,576.40 2,424.17 873,576.40 2,424.17 873,576.40 2,424.17 873,576.40 2,424.17 873,576.40
361 Structures and improvements 66,218,897.12 118,090.37 66,961,523.50 119,414.72 67,521,089.91 120,412.61 68,178,798.40 121,585.52 70,324,602.80 125,412.21 70,907,695.01 126,452.06 71,094,992.36
362 Station Equipment 340,329,755.68 538,855.45 343,262,038.23 543,498.23 345,471,387.76 546,996.36 348,068,276.54 551,108.10 356,540,604.90 564,522.62 358,842,952.41 568,168.01 359,582,460.20
TOTAL SUBSTATION EQUIPMENT 407,422,229.20 659,369.99 411,097,138.13 665,337.12 413,866,054.07 669,833.14 417,120,651.34 675,117.79 427,738,784.11 692,359.00 430,624,223.82 697,044.24 431,551,028.96
3631 Battery Storage 141,129,691.06 588,040.38 168,088,389.54 700,368.29 168,088,389.54 700,368.29 168,088,389.54 700,368.29 367,353,311.98 1,530,638.80 367,353,311.98 1,530,638.80 367,353,311.98
TOTAL BATTERY STORAGE 141,129,691.06 588,040.38 168,088,389.54 700,368.29 168,088,389.54 700,368.29 168,088,389.54 700,368.29 367,353,311.98 1,530,638.80 367,353,311.98 1,530,638.80 367,353,311.98
364 Poles,Towers and Fixtures 345,828,242.50 561,970.89 348,609,536.80 566,490.50 350,075,128.67 568,872.08 351,904,362.17 571,844.59 355,911,573.23 578,356.31 356,915,619.81 579,987.88 358,950,533.24
365 Overhead Conductors,Devices 165,600,315.96 307,740.59 166,637,848.56 309,668.67 167,167,905.98 310,653.69 167,869,103.16 311,956.75 169,382,195.85 314,768.58 169,741,404.12 315,436.11 170,493,843.96
366 Underground Conduit 56,809,038.60 112,197.85 57,075,545.67 112,724.20 57,272,721.55 113,113.63 57,528,699.50 113,619.18 57,968,712.14 114,488.21 58,156,260.04 114,858.61 58,471,213.30
367 Underground Conductors,Device 351,005,424.43 663,985.26 352,976,217.40 667,713.34 354,434,313.20 670,471.58 356,327,244.33 674,052.37 359,581,093.59 680,207.57 360,967,991.38 682,831.12 363,297,034.62
368 Line Transformers 782,546,239.67 1,252,073.98 786,904,444.39 1,259,047.11 788,784,365.62 1,262,054.98 792,135,120.12 1,267,416.19 798,872,966.81 1,278,196.75 800,120,187.78 1,280,192.30 803,218,331.87
369 Services 72,794,255.50 100,698.72 72,920,550.00 100,873.43 72,984,099.13 100,961.34 73,067,278.35 101,076.40 73,248,936.68 101,327.70 73,296,207.36 101,393.09 73,391,777.66
37000 Meters 19,681,955.01 56,585.62 19,732,413.17 56,730.69 19,755,739.85 56,797.75 19,797,603.41 56,918.11 19,869,494.63 57,124.80 19,887,690.50 57,177.11 19,924,634.81
37010 Meters-AMI 100,362,296.35 439,085.05 100,917,650.15 441,514.72 101,391,921.58 443,589.66 101,875,442.46 445,705.06 102,282,981.84 447,488.05 102,785,123.34 449,684.91 103,316,954.38
371 Installations,Cust Premises 5,878,361.45 20,378.32 5,878,442.56 20,378.60 5,878,494.33 20,378.78 5,878,561.63 20,379.01 5,878,604.19 20,379.16 5,878,649.06 20,379.32 5,878,689.90
373 Street Lighting,Signal System 7,130,155.52 19,726.76 7,131,418.85 19,730.26 7,131,476.98 19,730.42 7,131,669.91 19,730.95 7,133,650.20 19,736.43 7,133,650.20 19,736.43 7,134,795.99
TOTAL DISTRIBUTION LINES 1,907,636,285.00 3,534,443.04 1,918,784,067.55 3,554,871.52 1,924,876,166.89 3,566,623.91 1,933,515,085.04 3,582,698.61 1,950,130,209.17 3,612,073.56 1,954,882,783.59 3,621,676.88 1,964,077,809.73
390 Structures and Improvements 180,048,405.76 312,083.90 181,410,070.87 314,444.12 182,113,941.91 315,664.17 182,315,552.73 316,013.62 183,161,574.15 317,480.06 183,559,051.14 318,169.02 183,691,261.51
391 Office Furniture,Equipment 40,606,196.96 570,103.60 41,199,539.65 577,461.05 41,633,351.09 582,840.31 41,715,934.33 583,864.35 42,120,678.33 588,883.17 42,631,175.34 595,213.33 42,935,321.96
392 Transportation Equipment 133,653,663.49 545,752.46 135,391,335.58 552,847.95 136,583,113.35 557,714.38 136,905,402.55 559,030.39 137,819,749.90 562,763.98 138,793,439.19 566,739.88 139,869,767.27
393 Stores Equipment 7,732,876.52 25,513.54 8,185,973.52 27,023.86 8,325,570.52 27,489.18 8,334,318.52 27,518.34 8,339,775.52 27,536.53 8,339,775.52 27,536.53 8,372,506.52
394 Tools,Shop,Garage Equipment 15,873,748.88 68,711.22 15,930,886.33 68,949.29 15,984,782.33 69,173.86 15,994,838.63 69,215.76 16,057,434.82 69,476.58 16,092,620.31 69,623.18 16,164,173.31
395 Laboratory Equipment 16,546,305.15 71,388.44 16,632,752.15 71,748.63 16,716,264.15 72,096.60 16,734,422.79 72,172.26 16,779,557.79 72,360.32 16,748,679.70 72,231.67 16,742,395.87
96 3 Power
Operated Equipment 31,476,077.47 84,198.51 31,476,664.26 84,200.08 31,484,725.05 84,221.64 31,486,771.80 84,227.11 31,491,154.63 84,238.84 31,491,211.47 84,238.99 31,492,348.88
M. Larkin Workpaper
Case No. IPC-E-24-07
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Plant Bal Expense Plant Bal Expense Plant Bal Expense Plant Bal Expense Plant Bal Expense Plant Bal Expense Plant Bal
ACCT ACCOUNT DESCRIPTION 2/28/24 3/31/2024 3/31/24 4/30/2024 4/30/24 5/31/2024 5/31/24 6/30/2024 6/30/24 7/31/2024 7/31/24 8/31/2024 8/31/24
397 Communication Equipment 81,949,237.50 451,830.54 82,290,179.53 453,685.84 82,353,076.06 454,028.10 83,334,056.37 459,366.27 83,864,313.24 462,251.75 84,083,013.85 463,441.84 84,199,862.57
398 Miscellaneous Equipment 10,993,381.11 66,654.58 11,070,296.78 67,082.10 11,084,198.78 67,159.37 11,125,809.78 67,390.66 11,417,385.60 69,011.33 11,404,262.61 68,938.39 11,469,447.61
TOTAL GENERAL EQUIPMENT PLANT 518,879,892.84 2,196,236.79 523,587,698.68 2,217,442.92 526,279,023.24 2,230,387.61 527,947,107.50 2,238,798.76 531,051,623.98 2,254,002.56 533,143,229.13 2,266,132.83 534,937,085.50
Depreciation and Amortization Exp 6,527,220,121.13 14,510,779.67 6,586,573,762.04 14,697,641.37 6,606,049,213.43 14,742,711.65 6,628,005,902.24 14,790,485.70 6,871,897,189.12 15,712,118.04 6,887,059,648.33 15,749,900.15 6,902,553,481.11
Depreciation Expense on Disallowed Costs 24 691.61 24 691.61 24 691.61 24 691.61 24 691.61 24 691.61
6 527 220 121.13 14 486 088.06 6 586 573 762.04 14 672 949.76 6 606 049 213.43 14 718 020.04 6 628 005 902.24 14 765 794.09 6 871 897 189.12 15 687 426.43 6 887 059 648.33 15 725 208.54 6 902 553 481.11
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Case No. IPC-E-24-07
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IDAHO POWER COMPANY
Depreciation and Amortization Expense
Actuals for December 31,2023 thru January
Estimated February thru December 2024
Expense Plant Bal Expense Plant Bal Expense Plant Bal Expense Expense Plant Bal Annual Depr Exp for
ACCT ACCOUNT DESCRIPTION 9/30/2024 9/30/24 10/31/2024 10/31/24 11/30/2024 11/30/24 12/31/2024 12 Month Total 22/31/24 12/31/2024 Ending Plant
302 Franchises and Consents 127,237.34 64,036,988.70 145,684.15 64,907,426.04 147,664.39 65,603,102.47 149,247.06 1,569,187.59 67,759,450.41 1,849,833.00
3031 Miscellaneous Intangible Plant 448,773.38 63,991,461.56 451,139.80 74,912,773.60 528,135.05 74,233,572.52 523,346.69 5,510,745.60 75,434,751.62 6,381,779.99
Total Amortization Expense 576,010.72 128,028,450.26 596,823.95 139,820,199.64 675,799.44 139,836,674.99 672,593.75 7,079,933.19 143,194,202.03 8,231,612.99
310 Land and Land Rights 198.53 148,899.77 198.53 148,899.77 198.53 148,899.77 198.53 2,382.36 148,899.77 2,382.40
311 Structures and Improvements 52,536.05 37,303,704.94 52,536.05 37,303,704.94 52,536.05 37,303,704.94 52,536.05 630,432.60 37,303,704.94 630,432.61
312 Boiler Plant Equipment 565,482.07 185,403,956.25 565,482.07 185,403,956.25 565,482.07 185,403,956.25 565,482.07 6,785,784.84 185,403,956.25 6,785,784.80
314 Turbogenerator Units 208,131.24 56,378,666.21 208,131.24 56,378,666.21 208,131.24 56,378,666.21 208,131.24 2,497,574.88 56,378,666.21 2,497,574.91
315 Accessory electric Equipment 21,690.37 16,473,701.28 21,690.37 16,473,701.28 21,690.37 16,473,701.28 21,690.37 260,284.44 16,473,701.28 260,284.48
316 Misc Power Plant Equipment 27,307.62 8,423,945.60 27,307.62 8,423,945.60 27,307.62 8,423,945.60 27,307.62 327,691.44 8,423,945.60 327,691.48
TOTAL STEAM PRODUCTION PLANT 875,345.88 304,132,874.05 875,345.88 304,132,874.05 875,345.88 304,132,874.05 875,345.88 10,504,150.56 304,132,874.05 10,504,150.68
331 Structures and Improvements 483,969.20 289,785,794.27 509,540.02 291,385,917.46 512,353.57 292,870,520.84 514,964.00 5,819,336.89 297,845,397.13 6,284,537.88
332 Reservoirs,Dams,Waterways 443,825.73 315,668,183.44 444,566.03 315,759,799.27 444,695.05 316,018,716.22 445,059.69 5,313,594.07 317,158,044.63 5,359,970.95
333 Waterwheel,Turbines,Generato 982,068.84 416,067,657.23 984,693.46 416,393,112.88 985,463.70 417,742,505.37 988,657.26 11,655,506.79 423,900,667.59 12,038,778.96
334 Accessory Electric Equipment 215,672.22 77,581,285.46 215,934.58 77,608,948.03 216,011.57 77,723,641.56 216,330.80 2,573,090.07 78,247,063.33 2,613,451.92
335 Misc Power Plant Equipment 82,900.09 33,840,784.55 83,191.93 33,861,031.32 83,241.70 33,916,809.95 83,378.82 988,652.73 34,161,516.98 1,007,764.75
336 Roads,Railroads and Bridges 58,280.90 20,272,974.84 59,467.39 20,321,186.65 59,608.81 20,385,001.71 59,796.01 699,958.85 20,628,658.86 726,128.79
TOTAL HYDRO PRODUCTION PLANT 2,266,716.98 1,153,216,679.80 2,297,393.41 1,155,329,995.62 2,301,374.40 1,158,657,195.64 2,308,186.58 27,050,139.40 1,171,941,348.52 28,030,633.25
341 Structures and Improvements 337,402.50 156,358,614.82 337,474.01 156,388,103.45 337,537.66 156,464,461.44 337,702.46 4,032,996.80 157,205,257.97 4,071,616.18
342 Fuel Holders,Producers,Acces 23,109.12 10,424,847.42 23,108.41 10,424,563.15 23,107.78 10,423,827.09 23,106.15 277,449.67 10,416,686.06 277,083.85
343 Prime Movers 942,880.57 293,869,933.59 942,832.70 293,856,655.73 942,790.10 293,822,274.00 942,679.80 11,339,423.79 293,488,715.33 11,299,315.54
344 Generators 134,807.33 67,686,159.81 134,808.27 67,686,579.39 134,809.10 67,687,665.87 134,811.27 1,628,726.97 67,698,206.49 1,617,987.14
345 Accessory Electric Equipment 227,977.52 94,015,920.05 227,988.61 94,019,987.95 227,998.47 94,030,521.37 228,024.01 2,733,118.31 94,132,712.68 2,739,261.94
346 Misc Power Plant Equipment 20,941.15 7,905,449.19 20,949.44 7,908,232.54 20,956.82 7,915,439.74 20,975.92 249,255.30 7,985,361.28 253,934.49
TOTAL OTHER PRODUCTION PLANT 1,687,118.19 630,260,924.87 1,687,161.44 630,284,122.22 1,687,199.93 630,344,189.51 1,687,299.61 20,260,970.84 630,926,939.81 20,259,199.14
350.2 Land Rights&Easements 34,705.16 37,890,101.24 34,732.59 38,308,657.02 35,116.27 38,418,822.17 35,217.25 415,323.68 39,138,710.42 430,525.81
350.22 Transm-ROW Renewal Cost 3,721.79 1,342,441.48 3,725.28 1,360,027.78 3,774.08 1,364,656.54 3,786.92 44,521.74 1,394,903.80 46,450.30
352 Structures and Improvements 170,365.51 107,836,686.17 170,741.42 108,023,617.97 171,037.40 108,475,832.15 171,753.40 2,038,302.70 109,288,682.47 2,076,484.97
353 Station Equipment 904,088.61 498,970,009.93 906,462.18 499,955,825.52 908,253.08 502,834,252.23 913,482.22 10,800,211.73 507,541,457.65 11,064,403.78
354 Towers and Fixtures 238,652.11 239,015,648.33 239,015.65 244,099,739.22 244,099.74 245,437,887.39 245,437.89 2,849,007.73 254,182,187.22 3,050,186.25
355 Poles and Fixtures 539,942.93 253,531,549.21 540,867.30 259,591,304.56 553,794.78 261,186,250.57 557,197.33 6,443,029.26 271,608,628.69 6,953,180.89
356 Overhead Conductors,Devices 344,737.26 278,000,218.70 345,183.60 283,027,436.47 351,425.73 284,350,615.46 353,068.68 4,118,503.14 292,997,097.29 4,365,656.75
3591 Roads and Trails 232.93 405,090.98 232.93 405,090.98 232.93 405,090.98 232.93 2,795.16 405,090.98 2,795.13
TOTAL TRANSMISSION PLANT 2,236,446.30 1,416,991,746.04 2,240,960.95 1,434,771,699.52 2,267,734.01 1,442,473,407.48 2,280,176.62 26,711,695.14 1,476,556,758.53 27,989,683.88
360 Distr-ROW Renewal Cost 2,424.17 873,576.40 2,424.17 873,576.40 2,424.17 873,576.40 2,424.17 29,090.04 873,576.40 29,090.09
361 Structures and improvements 126,786.07 71,591,600.17 127,671.69 72,159,788.75 128,684.96 72,733,319.74 129,707.75 1,479,356.91 73,907,861.51 1,581,628.24
362 Station Equipment 569,338.90 361,543,235.66 572,443.46 363,786,619.72 575,995.48 366,051,097.27 579,580.90 6,682,977.78 370,688,639.07 7,043,084.14
TOTAL SUBSTATION EQUIPMENT 698,549.14 434,008,412.22 702,539.32 436,819,984.87 707,104.61 439,657,993.41 711,712.82 8,191,424.73 445,470,076.98 8,653,802.47
3631 Battery Storage 1,530,638.80 367,353,311.98 1,530,638.80 367,353,311.98 1,530,638.80 367,353,311.98 1,530,638.80 13,047,237.52 367,353,311.98 18,367,665. 00
TOTAL BATTERY STORAGE 1,530,638.80 367,353,311.98 1,530,638.80 367,353,311.98 1,530,638.80 367,353,311.98 1,530,638.80 13,047,237.52 367,353,311.98 18,367,665.60
364 Poles,Towers and Fixtures 583,294.62 361,646,203.17 587,675.08 362,702,020.23 589,390.78 364,049,109.78 591,579.80 6,909,835.40 367,617,271.69 7,168,536.80
365 Overhead Conductors,Devices 316,834.39 171,512,941.98 318,728.22 171,890,659.38 319,430.14 172,403,009.12 320,382.26 3,759,033.07 173,759,820.73 3,874,844.00
366 Underground Conduit 115,480.65 59,043,195.79 116,610.31 59,477,773.93 117,468.60 60,895,446.33 120,268.51 1,376,699.67 61,422,626.86 1,455,716.26
367 Underground Conductors,Device 687,236.89 367,526,786.14 695,238.17 370,740,447.76 701,317.35 381,223,992.49 721,148.72 8,170,129.32 385,122,437.95 8,742,279.34
368 Line Transformers 1,285,149.33 808,139,742.05 1,293,023.59 809,698,435.25 1,295,517.50 813,407,048.16 1,301,451.28 15,266,420.19 819,847,335.92 15,741,068.85
369 Services 101,525.29 73,540,828.46 101,731.48 73,607,429.68 101,823.61 73,762,010.90 102,037.45 1,214,267.04 73,940,381.53 1,227,410.33
37000 Meters 57,283.33 19,980,635.61 57,444.33 20,001,110.70 57,503.19 20,042,673.34 57,622.69 684,127.50 20,114,093.15 693,936.21
37010 Meters-AMI 452,011.68 103,815,467.88 454,192.67 104,318,810.56 456,394.80 104,787,694.54 458,446.16 5,359,418.82 105,259,706.82 5,526,134.61
371 Installations,Cust Premises 20,379.46 5,878,721.54 20,379.57 5,878,769.86 20,379.74 5,878,837.16 20,379.97 244,429.18 5,878,905.03 244,562.45
373 Street Lighting,Signal System 19,739.60 7,135,198.71 19,740.72 7,135,579.52 19,741.77 7,136,157.05 19,743.37 236,685.24 7,136,611.15 236,935.49
TOTAL DISTRIBUTION LINES 3,638,935.24 1,978,219,721.32 3,664,764.14 1,985,451,036.87 3,678,967.48 2,003,585,978.86 3,713,060.21 43,221,045.43 2,020,099,190.82 44,911,424.34
390 Structures and Improvements 318,398.19 184,185,239.39 319,254.41 184,649,332.81 320,058.84 184,933,049.93 320,550.62 3,784,224.96 187,603,356.39 3,902,149.81
391 Office Furniture,Equipment 598,984.75 43,879,083.44 610,687.39 44,385,920.11 616,972.17 45,284,621.74 628,116.07 7,110,194.00 45,895,872.77 7,628,346.99
392 Transportation Equipment 571,134.88 140,883,695.29 575,275.09 142,001,222.20 579,838.32 142,875,688.03 583,409.06 6,734,693.95 146,232,891.07 7,165,411.66
393 Stores Equipment 27,645.64 8,464,423.52 27,952.03 8,481,521.75 28,009.02 8,509,748.75 28,103.11 325,049.22 8,997,577.75 356,750.47
394 Tools,Shop,Garage Equipment 69,921.32 16,194,053.69 70,045.82 16,176,750.98 69,973.73 16,202,373.54 70,080.49 831,838.18 16,583,328.91 860,013.65
395 Laboratory Equipment 72,205.48 16,870,221.87 72,738.09 16,856,435.12 72,680.65 16,712,147.94 72,079.45 863,713.14 16,747,259.21 866,708.96
96 3 Power
Operated Equipment 84,242.03 31,495,237.80 84,249.76 31,498,332.65 84,258.04 31,499,850.92 84,262.10 1,010,342.34 31,516,343.02 1,011,674.61
M. Larkin Workpaper
Case No. IPC-E-24-07
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■
Expense Plant Bal Expense Plant Bal Expense Plant Bal Expense Expense Plant Bal Annual Depr Exp for
ACCT ACCOUNT DESCRIPTION 9/30/2024 9/30/24 10/31/2024 10/31/24 11/30/2024 11/30/24 12/31/2024 12 Month Total 12/31/24 12/31/2024 Ending Plant
397 Communication Equipment 464,077.70 84,825,584.09 467,482.66 86,099,668.59 474,415.81 86,345,971.31 475,756.10 5,530,920.54 89,930,528.21 5,943,144.81
398 Miscellaneous Equipment 69,300.71 11,507,740.97 69,513.56 11,628,453.97 70,184.52 11,654,799.97 70,330.96 817,979.85 11,482,711.48 832,493.26
TOTAL GENERAL EQUIPMENT PLANT 2,275,910.70 538,305,280.06 2,297,198.81 541,777,638.19 2,316,391.10 544,018,252.14 2,332,687.96 27,008,956.18 554,989,868.81 28,566,694.22
Depreciation and Amortization Exp 15,785,671.95 6,950,517,400.61 15,892,826.70 6,995,740,862.96 16,040,555.65 7,030,059,878.04 16,111,702.23 183,075,552.99 7,114,664,571.53 195,514,866.57
Depreciation Expense on Disallowed Costs 24 691.61 24 691.61 24 691.61 24 691.61 296,299.32 296,299.32
15 760 980.34 6 950 517 400.61 15 868 135.09 6 995 740 862.96 16 015 864.04 7 030 059 878.04 16 087 010.62 182 779 253.67 7 114 664 571.53 195 218 567.25
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 6 of 12
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IDAHO POWER COMPANY
ACCUMULATED RESERVE FOR DEPRECIATION AND AMORTIZATION
Actuals for December 31,2023 thru January 31,2024
Estimated February thru December 2024
ADJUSTED
December-23 January 2024 ruary 2024 A r-24
Adjusted 2128/24 3131124
ACCT ACCOUNT DESCRIPTION BALANCE Expense , Expense Salvage Removal Retirements BALANCE BALANCE Expense Salvage Removal
302 Franchises and Consents (19,450,201.03) (123,345.65) 0.00 0.00 0.00 (19,573,546.68) (123,035.65) 0.00 (19,696,582.33) (124,221.98) 0.00 (19,820,804.31) (125,001.10)
303 Miscellaneous Intangible Plant (25,037,365.64) (472,420.58) 0.00 0.00 12,077.03 (25,497,709.19) (433,642.25) 0.00 (25,931,351.44) (435,180.36) 0.00 (26,366,531.80) (439,759.90)
TOTAL 111000 Total Accumulated Amortization (44,487,566.67) (595,766.23) 0.00 0.00 12,077.03 (45,071,255.87) (556,677.90) 0.00 0.00 0.00 (45,627,933.77) (559,402.34) 0.00 0.00 0.00 (46,187,336.11) (564,761.00) 0.00 0.00
310 Land and Land Rights (128,463.19) (198.53) 0.00 0.00 0.00 (128,661.72) (198.53) 0.00 0.00 0.00 (128,860.25) (198.53) 0.00 0.00 0.00 (129,058.78) (198.53) 0.00 0.00
311 Structures and Improvements (31,798,011.98) (52,536.05) 0.00 0.00 0.00 (31,850,548.03) (52,536.05) 0.00 0.00 0.00 (31,903,084.08) (52,536.05) 0.00 0.00 0.00 (31,955,620.13) (52,536.05) 0.00 0.00
312 Boiler Plant Equipment (98,070,228.09) (565,482.07) 0.00 0.00 0.00 (98,635,710.16) (565,482.07) 0.00 0.00 0.00 (99,201,192.23) (565,482.07) 0.00 0.00 0.00 (99,766,674.30) (565,482.07) 0.00 0.00
314 Turbogenerator Units (40,404,364.77) (208,131.24) 0.00 0.00 0.00 (40,612,496.01) (208,131.24) 0.00 0.00 0.00 (40,820,627.25) (208,131.24) 0.00 0.00 0.00 (41,028,758.49) (208,131.24) 0.00 0.00
315 Accessory electric Equipment (13,759,532.66) (21,690.37) 0.00 0.00 0.00 (13,781,223.03) (21,690.37) 0.00 0.00 0.00 (13,802,913.40) (21,690.37) 0.00 0.00 0.00 (13,824,603.77) (21,690.37) 0.00 0.00
316 Misc Power Plant Equipment (549,482.93) (27,307.62) 0.00 0.00 0.00 (576,790.55) (27,307.62) 0.00 0.00 0.00 (604,098.17) (27,307.62) 0.00 0.00 1 0.00 (631,405.79) (27,307.62) 0.00 0.00
TOTAL STEAM PRODUCTION PLANT (184,710,083.62) (875,345.88) 0.00 0.00 0.00 (185,585,429.50) (875,345.88) 0.00 0.00 0.00 (186,460,775.38) (875,345.88) 0.00 0.00 0.00 (187,336,121.26) (875,345.88) 0.00 0.00
331 Structures and Improvements (119,256,472.52) (451,554.39) (1,201.05) 23,342.60 0.00 (119,685,885.36) (472,843.88) (42,847.27) 42,473.84 61,219.13 1 (120,097,883.54) (474,853.01) (43,912.65) 43,529.92 62,741.32 (120,510,377.96) (476,912.10) (16,867.75)1 16,720.74
332 Reservoirs,Dams,Waterways (207,947,584.46) (444,087.83) (4,936.12) 77,437.49 3,451.52 (208,315,719.40) (439,825.02) (8,929.64) 8,851.82 12,758.45 (208,742,863.79) (440,136.23) (21,205.44) 21,020.62 30,297.81 (209,152,887.02) (440,875.27) (14,643.56) 14,515.94
333 Waterwheel,Turbines,Generalo (144,491,543.88) (988,437.12) (7,533.50) 112,785.99 0.00 (145,374,728.51) (943,695.90) (48,252.87) 47,832.32 68,942.53 (146,249,902.43) (946,463.18) (123,589.77) 122,512.62 176,582.05 (147,020,860.72) (953,551.01) (87,440.29) 86,678.20
334 Accessory Electric Equipment (32,519,820.12) (214,259.05) (577.20) 8,641.45 3,026.02 (32,722,988.90) (211,836.44) (8,976.68) 8,898.44 12,825.66 (32,922,077.92) (212,113.06) (22,991.90) 22,791.52 32,850.27 (33,101,541.10) (212,821.56) (16,266.87) 16,125.09
335 Misc Power Plant Equipment (11,115,712.21) (81,392.16) (577.20) 8,641.45 0.00 (11,189,040.12) (81,407.26) (17,002.98) 16,854.79 24,293.44 (11,246,302.13) (81,524.14) (40,115.70) 39,766.07 57,316.33 (11,270,859.57) (81,799.91) (27,641.29) 27,400.39
336 Roads,Railroads and Bridges (7,141,420.64) (59,988.06) 0.00 0.00 0.00 (7,201,408.70) (56,923.93) (9.36) 9.28 13.38 (7,258,319.33) (57,074.99) (15.55)l 15.41 22.22 (7,315,372.24) (57,325.82) (9.18) 9.10
TOTAL HYDRO PRODUCTION PLANT (522,472,553.83) (2,239,718.61) (14,825.07) 230,848.98 6,477.54 (524,489,770.99) (2,206,532.43) (126,018.80) 124,920.49 180,052.59 (526,517,349.14) (2,212,164.61) (251,831.01) 249,636.16 359,809.99 (528,371,898.61) (2,223,285.67) (162,868.94) 161,449.46
341 Structures and Improvements (46,810,055.83) (334,339.54) (2,303.67) (70,762.53) 0.00 (47,217,461.57) (334,473.72) (152.62) 161.61 696.90 (47,551,229.40) (334,497.32) (3,647.48) 3,862.33 16,655.15 (47,868,856.72) (335,061.34) (649.93) 688.22
342 Fuel Holders,Producers,Acces (4,088,733.62) (23,122.93) 0.00 0.00 0.00 (4,111,856.55) (23,138.12) (64.29) 68.08 293.57 (4,134,697.31) (23,137.88) (1,536.49) 1,626.99 7,015.93 (4,150,728.76) (23,132.30) (273.78) 289.91
343 Prime Movers (24,282,314.75) (959,190.17) (43,769.73) (1,344,487.97) 0.00 (26,629,762.62) (944,840.86) (11,669.79)1 12,357.19 53,286.72 (27,520,629.36) (944,825.07) (278,894.14) 295,322.15 1,273,489.21 (27,175,537.21) (944,447.55) (49,695.40) 52,622.67
344 Generators (33,248,944.61) (146,014.02) 0.00 0.00 0.00 (33,394,958.63) (134,768.87) (4.65)1 4.92 21.23 (33,529,706.00) (134,769.18) (111.09) 117.63 507.26 (33,663,961.38) (134,776.59) (19.79) 20.96
345 Accessory Electric Equipment (34,581,918.82) (227,344.85) 0.00 0.00 0.00 (34,809,263.67) (227,523.59) (102.26) 108.29 466.96 (35,036,314.27) (227,527.24) (2,444.00) 2,587.96 11,159.81 (35,252,537.74) (227,614.66) (435.49) 461.14
346 Misc Power Plant Equipment (2,594,817.85) (20,382.53) 0.00 0.00 0.00 (2,615,200.38) (20,601.74) (105.74) 111.97 482.83 (2,635,313.06) (20,604.48) (2,527.07) 2,675.93 11,539.15 (2,644,229.53) (20,669.84) (450.29) 476.82
TOTAL OTHER PRODUCTION PLANT (145,606,785.48) (1,710,394.04) (46,073.40) (1,415,250.50) 0.00 (148,778,503.42) (1,685,346.90) (12,099.35) 12,812.06 55,248.21 (150,407,889.40) (1,685,361.17) (289,160.27) 306,192.99 1,320,366.51 (150,755,851.34) (1,685,702.28) (51,524.68) 54,559.72
350.2 Land Rights&Easements (10,342,082.36) (34,228.59) 0.00 0.00 0.00 (10,376,310.95) (34,271.08) 0.00 0.00 0.00 (10,410,582.03) (34,307.11) 0.00 0.00 1 0.00 (10,444,889.14) (34,425.87) 0.00 0.00
350.22 Transm-ROW Renewal Cost (67,659.10) (3,666.25) 0.00 0.00 (71,325.35) (3,666.57) 0.00 0.00 0.00 (74,991.92) (3,671.16) 0.00 0.00 0.00 (78,663.08) (3,686.26) 0.00 0.00
352 Structures and Improvements (34,461,851.37) (167,468.42) (632.81) (233,939.56) 10,956.45 (34,852,935.71) (168,352.58) (253.34) 20,741.52 46,061.57 (34,954,738.54) (169,055.87) (105.33) 8,623.40 19,150.35 (35,096,125.99) (169,348.26) (158.08) 12,942.14
353 Station Equipment (127,023,308.53) (878,091.47) (2,828.98) (982,853.82) 1,950.00 (128,885,132.80) (890,805.16) (8,883.71) 727333.28 1,615,219.37 (127,442,269.02) (894,978.55) (4,634.55) 379,443.32 842,645.62 (127,119,793.18) (897,155.76) (5,716.34) 468,012.32
354 Towers and Fixtures (81,539,914.51) (232,601.84) (4,543.35) 4,564.98 0.00 (81,772,494.72) (232,900.16) (60.43) 4:947.31 10,986.71 (81,989,521.29) (233,377.53) (199.22) 16,310.29 36,220.93 (82,170,566.82) (234,951.31) (102.52) 8,393.79
355 Poles and Fixtures (81,356,399.32) (525,950.04) (54,520.99) 54,817.26 0.00 (81,882,053.09) (525,317.25) (463.19)l 37,922.61 84,216.32 (82,285,694.60) (526,531.07) (1,527.04) 125,023.11 277,644.04 (82,411,085.56) (530,532.79) (785.86) 64,340.83
356 Overhead Conductors,Devices (90,167,889.14) (337,157.58) (31,803.94) 31,976.97 0.00 (90,504,873.69) (337,675.15) (433.48) 35,489.80 78,813.69 (90,728,678.83) (338,261.25) (1,429.08) 117,002.65 259,832.66 (90,691,533.85) (340,193.51) (735.45) 60,213.25
359 Roads and Trails (298,747.20) (232.93) 0.00 0.00 0.00 (298,980.13) (232.93) 0.00 0.00 0.00 (299,213.06) (232.93) 0.00 0.00 0.00 (299,445.99) (232.93) 0.00 0.00
TOTAL TRANSMISSION PLANT (425,257,851.53) (2,179,397.12) (94,330.07) (1,125,434.17) 12,906.45 (428,644,106.43) (2,193,220.88) (10,094.15) 826,434.52 1,835,297.65 (428,185,689.29) (2,200,415.47) (7,895.22) 646,402.77 1,435,493.60 (428,312,103.61) (2,210,526.69) (7,498.25) 613,902.33
3601 Distr-ROW Renewal Cost (253,238.88) (2,424.17) 0.00 0.00 (255,663.05) (2,424.17) 0.00 0.00 0.00 (258,087.22) (2,424.17) 0.00 0.00 0.00 (260,511.39) (2,424.17) 0.00 0.00
361 Structures and improvements (17,175,936.64) (117,850.42) (310.93) 4,537.23 4,850.40 (17,284,710.36) (117,288.53) (2,024.00) 9,152.69 27,095.00 (17,367,775.20) (118,090.37) (3,342.95) 15,117.10 44,751.62 (17,429,339.80) (119,414.72) (2,518.90) 11,390.68
362 Station Equipment 75,744,565.47 536,425.67 2,816.00 41,163.09 3,200.00 76,239,444.05 536,044.60 24,085.94 108,918.73 322,435.55 76,368,220.31 538,855.45 39,783.62 179,905.05 532,578.59 76,234,375.74 543,498.23 29,975.26 135,550.76
TOTAL SUBSTATION EQUIPMENT 93,173,740.99 656,700.26 3,126.93 45,700.32 8,050.40 93,779,817.46 655,757.30 26,109.94 118,071.42 349,530.55 93,994,082.73 659,369.99 43,126.57 195,022.15 577,330.21 93,924,226.93 665,337.12 32,494.16 146,941.44
363 Battery Storage (2,244,321.74) (586,219.09) 0.00 0.00 0.00 (2,830,540.83) (588,040.38) 0.00 1 0.00 0.00 (3,418,581.21) (588,040.38) 0.00 0.00 0.00 (4,006,621.59) (700,368.29) 0.00 0.00
TOTAL BATTERY STORAGE (2,244,321.74) (586,219.09) 0.00 0.00 0.00 (2,830,540.83) (588,040.38) 0.00 1 0.00 0.00 (3,418,581.21) (588,040.38) 0.00 0.00 0.00 (4,006,621.59) (700,368.29) 0.00 0.00
364 Poles,Towers and Fixtures (148,225,442.56) (570,649.36) (5,165.71) 122,732.88 406,302.58 (148,272,222.17) (559,723.51) (38,947.31) 176,123.17 521,382.97 (148,173,386.85) (561,970.89) (78,325.08) 354,192.94 1,048,528.54 (147,410,961.35) (566,490.50) (41,273.09) 186,640.55
365 Overhead Conductors,Devices (59,111,237.41) (306,651.29) (1,072.15) 5,544.50 273,237.87 (59,140,178.48) (306,782.38) (22,201.51) 100,397.18 297,208.94 (59,071,556.25) (307,740.59) (44,673.12) 202,015.79 1 598,033.71 (58,623,920.46) (309,668.67) (22,822.72) 103,206.37
366 Underground Conduit (19,983,056.89) (113,986.98) 280.58 (9,193.07) 30,355.08 (20,075,601.28) (111,882.94) (5,182.62) 23,436.26 69,379.11 (20,099,851.47) (112,197.85) (8,662.41) 39,172.16 1 115,962.64 (20,065,576.90) (112,724.20) (6,408.90) 28,981.63
367 Underground Conductors,Device (108,880,818.99) (664,172.16) 3,160.45 4,752.06 381,829.74 (109,155,248.90) (661,754.79) (14,498.11) 65,561.75 194,084.51 (109,571,855.54) (663,985.26) (24,232.65) 109,582.16 324,399.54 (109,826,091.76) (667,713.34) (17,928.58) 81,074.62
368 Line Transformers (203,593,185.72) (1,243,685.72) (97,993.89) (54,292.63) 754,921.62 (204,234,236.34) (1,248,611.46) (34,948.25) 158,039.09 467,848.11 (204,891,908.86) (1,252,073.98) (70,381.84) 318,272.91 942,193.35 (204,953,898.41) (1,259,047.11) (30,359.36) 137,287.72
369 Services (46,003,897.34) (100,206.03) (992.24) (17,132.07) 39,413.71 (46,082,813.97) (100,612.50) (735.33) 3,325.22 9,843.74 (46,170,992.84) (100,698.72) (1,490.01) 6,737.98 19,946.65 (46,246,496.94) (100,873.43) (749.75) 3,390.43
37000 Meters (5,205,657.48) (56,437.28) (178.39) 7,642.39 14,329.44 (5,240,301.32) (56,502.60) (3,358.32) 15,186.61 44,957.40 (5,240,018.23) (56,585.62) (5,868.01) 26,535.67 78,554.38 (5,197,381.81) (56,730.69) (2,712.77) 12,267.37
37010 Meters-AMI (34,307,048.84) (434,399.71) (2,914.94) 139,731.08 0.00 (34,604,632.41) (436,906.35) (25,950.84) 117,352.01 347,400.85 (34,602,736.74) (439,085.05) (28,940.29) 130,870.55 387,420.22 (34,552,471.31) (441,514.72) (24,714.97) 111,763.28
371 Installations,Cust Premises (1,018,026.10) (20,259.24) (705.11) 15,249.21 12,649.29 (1,011,091.95) (20,378.01) (4.95) 22.38 66.27 (1,031,386.26) (20,378.32) (4.47) 20.23 59.89 (1,051,688.93) (20,378.60) (2.86) 12.91
373 Street Lighting,Signal System 825,301.14 19,602.59 514.25 13,954.73 2,639.58 828,823.67 19,725.94 27.88 126.06 373.18 848,078.25 19,726.76 117.92 533.23 1,578.53 865,811.17 19,730.26 5.43 24.54
TOTAL DISTRIBUTION LINES 627,153,672.47 3,530,050.36 106,095.65 228,989.08 1,915,678.91 628,645,150.49 3,522,880.48 145,855.12 659,569.73 1,952,545.08 629,701,771.28 3,534,443.04 262,695.80 1,187,933.64 3,516,677.45 628,794,299.03 3,554,871.52 146,978.43 664,649.42
390 Structures and Improvements (36,401,468.59) (301,402.60) (122.87) 1,855.28 0.00 (36,701,138.78) (310,705.41) (41,545.49) 17,598.43 253,945.55 (36,781,845.70) (312,083.90) (71,133.10) 30,131.56 1 434,798.89 (36,700,132.25) (314,444.12) (36,770.07) 15,575.59
391 Office Furniture,Equipment (19,186,817.60) (588,372.19) 0.00 0.00 1,799,216.07 (17,975,973.72) (568,695.62) (851.80) 16,792.65 608,429.39 (17,920,299.10) (570,103.60) (342.10) 6,744.32 244,359.31 (18,239,641.17) (577,461.05) (218.45) 4,306.55
392 Transportation Equipment (27,291,953.29) (538,942.96) 0.00 0.00 0.00 (27,830,896.25) (541,244.60) (143,505.36) 60,788.03 877,172.14 (27,577,686.04) (545,752.46) (225,881.52) 95,682.09 1,380,693.91 (26,872,944.02) (552,847.95) (154,920.24) 65,623.30
393 Stores Equipment (1,526,953.50) (25,582.30) 0.00 0.00 0.00 (1,552,535.80) (25,139.14) 0.00 0.00 0.00 (1,577,674.94) (25,513.54) 0.00 0.00 0.00 (1,603,188.48) (27,023.86) 0.00 0.00
394 Tools,Shop,Garage Equipment (5,206,851.30) (68,227.43) 0.00 0.00 0.00 (5,275,078.73) (68,439.50) 0.00 0.00 0.00 (5,343,518.23) (68,711.22) (3.43) 67.61 2,449.55 (5,409,715.72) (68,949.29) 0.00 0.00
395 Laboratory Equipment (7,048,496.60) (70,995.07) 0.00 0.00 0.00 (7,119,491.67) (71,016.48) 0.00 0.00 0.00 (7,190,508.15) (71,388.44) 0.00 0.00 0.00 (7,261,896.59) (71,748.63) (37.24) 734.08
396 Power Operated Equipment (6,014,347.77) (83,814.21) (112,000.00) 0.00 0.00 (6,210,161.98) (84,191.03) (162.22) 68.71 991.56 (6,293,454.96) (84,198.51) (34.06) 14.43 208.21 (6,377,464.89) (84,200.08) (467.93) 198.21
397 Communication Equipment (35,134,469.68) (452,345.04) (2.30) 870.14 41,302.99 (35,544,643.89) (452,238.89) (562.89) 11,096.96 402,063.82 (35,584,284.89) (451,830.54) (507.89) 10,012.77 362,781.47 (35,663,829.08) (453,685.84) (399.49) 7,875.57
398 Miscellaneous Equipment 4,494,719.65 66,218.52 5.89 1,537.06 83,009.01 4,476,397.99 66,195.15 0.00 0.00 0.00 4,542,593.14 66,654.58 1.18 23.30 844.33 4,608,381.27 67,082.10 0.00 0.00
TOTAL GENERAL EQUIPMENT PLANT (142,306,077.98) (2,195,900.32) (112,131.06) 4,262.48 1,923,528.07 (142,686,318.81) (2,187,865.82) (186,627.76) 106,344.78 1 2,142,602.46 (142,811,865.15) (2,196,236.79) (297,903.28) 142,676.08 2,426,135.66 (142,737,193.48) (2,217,442.92) (192,813.42) 94,313.30
108000 TOTAL 2 142 925 087.64 13 973 725.68 376 582.18 2 030 883.81 3,866,641.37 2 155 439 637.94 13 914 990.07 506 805.12 1,848,153.00 6,515,276.55 2 161 498 003.58 13 951 377.33 1 152 612.15 2,727,863.79 9,635,813.43 2 164 238 315.84 14 132 880.37 594 177.88 1,735,815.67
Total Reserve for Amortization and Depreciation 2 187 412 654.31 14 569 491.91 376 582.18 2 030 883.81 3,878,718.40 2 200 510 893.81 14 471 667.97 506 805.12 1,848,153.00 6,515,276.55 2 207 125 937.35 14 510 779.67 1 152 612.15 2,727,863.79 9,635,813.43 2 210 425 651.95 14 697 641.37 594 177.88 1 735 815.67
1084001 Reserve for Disallowed Costs 3,149,243.60 24,691.61 3,124,551.99 24,691.61 3,099,860.38 24,691.61 3,075,168.77 24,691.61
Regulatory Accumulated Reserve W/O ARO 2,146,074,331.24 13,949,034.07 376,582.18 2,030,883.81 3,866,641.37 2,158,564,189.93 13,890,298.46 506,805.12 1,848,153.00 6,515,276.55 2,164,597,863.96 13,926,685.72 1,152,612.15 2,727,863.79 9,635,813.43 2,167,313,484.61 14,108,188.76 594,177.88 1,735,815.67
317 Asset Retire Cost Steam Prod (27,071,493.71) (40,931.64) 0.00 (27,112,425.35) (40,931.64) 0.00 (27,153,356.99) (40,931.64) 0.00 (27,194,288.63) (40,931.64)
374 lAsset Retirement Cost-Dist Pit 0.00 0.00 0.00 0.00 1 0.00 0.00 0.00
TOTAL ASSET RETIREMENT OBLIGATIONS 27,071,493.71 40,931.64 0.00 0.00 0.00 27,112,425.35 40,931.64 0.00 0.00 0.00 27,153,356.99 40,931.64 0.00 0.00 0.00 27,194,288.63 40,931.64 0.00 0.00
Total 108 2,173,145,824.95 13,989,965.71 376,582.18 2,030,883.81 3,866,641.37 2,185,676,615.28 13,931,230.10 506,805.12 1,848,153.00 6,515,276.55 2,191,751,220.95 13,967,617.36 1,152,612.15 2,727,863.79 9,635,813.43 2,194,507,773.24 14,149,120.40 594,177.88 1,735,815.67
RECON OF RESERVE:
Key Report Accum Rsv 12-31-23 Recon 108 RET to Kristen's sheet (3,878,718.40) (6,515,276.55) (9,635,813.43)
Diff 0.00 0.00 0.00
111
TB 108
Diff
TB 111
Diff
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 7 of 12
LARKIN Workpaper 1 -Accumulated Reserve.xlsx Accumulated Reserve
Accumulated Reserve

IDAHO POWER COMPANY
ACCUMULATED RESERVE FOR DEPRECIAI
Actuals for December 31,2023 thru January
Estimated February thru December 2024
Jun-24 I Au -24
4/30/2024 5/31/2024 6/30/2024
ACCT ACCOUNT DESCRIPTION Retirements BALANCE Removal Retirements BALANCE Expense Salvage Removal Retirements BALANCE Expense Saly Retirements B Expense Salvage
302 Franchises and Consents 0.00 (19,945,805.41) (125,064.95) 0.00 (20,070,870.36) (125,461.74) 0.00 (20,196,332.10) (126,205.04) 0.00 (20,322,537.14) (127,018.54)
3031 Miscellaneous Intangible Plant 46,079.19 (26,760,212.51) (441,300.19) 0.00 1 (27,201,512.70) (442,154.46) 54,354.59 (27,589,312.57) (447,239.85) 0.00 (28,036,552.42) (447,653.09)
TOTAL 111000 Total Accumulated Amortization 46,079.19 (46,706,017.92) (566,365.14) 0.00 0.00 0.00 (47,272,383.06) (567,616.20) 0.00 0.00 54,354.59 (47,785,644.67) (573,444.89) 0.00 0.00 0.00 (48,359,089.56) (574,671.63) 0.00
310 Land and Land Rights 0.00 (129,257.31) (198.53) 0.00 0.00 0.00 (129,455.84) (198.53) 0.00 0.00 0.00 (129,654.37) (198.53) 0.00 0.00 0.00 (129,852.90) (198.53) 0.00
311 Structures and Improvements 0.00 (32,008,156.18) (52,536.05) 0.00 0.00 0.00 (32,060,692.23) (52,536.05) 0.00 0.00 0.00 (32,113,228.28) (52,536.05) 0.00 0.00 0.00 (32,165,764.33) (52,536.05) 0.00
312 Boiler Plant Equipment 0.00 (100,332,156.37) (565,482.07) 0.00 0.00 0.00 (100,897,638.44) (565,482.07) 0.00 0.00 0.00 (101,463,120.51) (565,482.07) 0.00 0.00 0.00 (102,028,602.58) (565,482.07) 0.00
314 Turbogenerator Units 0.00 (41,236,889.73) (208,131.24) 0.00 0.00 0.00 (41,445,020.97) (208,131.24) 0.00 0.00 0.00 (41,653,152.21) (208,131.24) 0.00 0.00 0.00 (41,861,283.45) (208,131.24) 0.00
315 Accessory electric Equipment 0.00 (13,846,294.14) (21,690.37) 0.00 0.00 0.00 (13,867,984.51) (21,690.37) 0.00 0.00 0.00 (13,889,674.88) (21,690.37) 0.00 0.00 0.00 (13,911,365.25) (21,690.37) 0.00
316 Misc Power Plant Equipment 0.00 (658,713.41) (27,307.62) 0.00 0.00 0.00 (686,021.03) (27,307.62) 0.00 0.00 0.00 (713,328.65) (27,307.62) 0.00 0.00 0.00 (740,636.27) (27,307.62) 0.00
TOTAL STEAM PRODUCTION PLANT 0.00 (188,211,467.14) (875,345.88) 0.00 0.00 0.00 (189,086,813.02) (875,345.88) 0.00 0.00 0.00 (189,962,158.90) (875,345.88) 0.00 0.00 0.00 (190,837,504.78) (875,345.88) 0.00
331 Structures and Improvements 24,100.23 (120,963,336.84) (477,703.04) (40,239.53) 39,888.82 57,493.26 (121,383,897.33) (479,589.89) (42,926.72) 42,552.59 61,332.65 (121,802,528.71) (481,602.75) (39,417.28) 39,073.73 56,318.44 (122,228,156.57) (483,451.04) (11,050.34)
332 Reservoirs,Dams,Waterways 20,922.37 (209,572,967.55) (441,385.63) (28,185.62) 27,939.97 40,270.93 (209,974,327.90) (442,367.94) (21,235.41) 21,050.33 30,340.64 (210,386,540.28) (443,108.03) (15,884.19) 15,745.75 22,694.94 (210,807,091.81) (443,661.62) (4,708.62)
333 Waterwheel,Turbines,Generalo 124,932.54 (147,850,241.27) (958,565.68) (167,093.38) 165,637.07 238,738.93 (148,571,524.33) (968,148.42) (123,927.59) 122,847.49 177,064.71 (149,363,688.14) (975,255.62) (91,560.94) 90,762.94 130,820.04 (150,208,921.73) (980,506.60) (27,240.53)
334 Accessory Electric Equipment 23,241.70 (33,291,262.73) (213,322.83) (31,085.05) 30,814.13 44,413.56 (33,460,442.92) (214,280.73) (23,054.75) 22,853.81 32,940.06 (33,641,984.53) (214,991.17) (17,033.45) 16,885.00 24,336.98 (33,832,787.17) (215,516.06) (5,067.67)
335 Misc Power Plant Equipment 39,493.20 (11,313,407.18) (81,989.93) (53,238.55) 52,774.55 76,065.94 (11,319,795.17) (82,355.92) (40,167.66) 39,817.58 57,390.57 (11,345,110.60) (82,632.05) (30,078.66) 29,816.51 42,975.66 (11,385,029.14) (82,838.82) (8,913.48)
336 Roads,Railroads and Bridges 13.12 (7,372,685.02) (57,473.93) (18.57) 18.41 26.54 (7,430,132.58) (57,773.50) (15.45) 15.32 22.08 (7,487,884.13) (58,022.73) (12.40) 12.29 17.72 (7,545,889.25) (58,222.78) (3.60)
TOTAL HYDRO PRODUCTION PLANT 232,703.16 (530,363,900.60) (2,230,441.04) (319,860.70) 317,072.95 457,009.16 (532,140,120.23) (2,244,516.40) (251,327.58) 249,137.12 359,090.70 (534,027,736.39) (2,255,612.35) (193,986.92)1 192,296.22 277,163.77 (536,007,875.67) (2,264,196.92) (56,984.24)
341 Structures and Improvements 2,967.74 (48,200,912.03) (335,161.85) (554.86) 587.55 2,533.62 (48,533,507.58) (335,247.65) (10,303.37) 10,910.28 47,047.34 (48,821,100.98) (336,840.91) (2,696.25) 2,855.07 12,311.66 (49,145,471.41) (337,257.84) (935.48)
342 Fuel Holders,Producers,Acces 1,250.15 (4,172,594.78) (23,131.30) (233.73) 247.50 1,067.28 (4,194,645.04) (23,130.45) (4,340.26) 4,595.92 19,818.55 (4,197,701.28) (23,114.68) (1,135.79) 1,202.69 5,186.25 (4,215,562.81) (23,110.55) (394.07)
343 Prime Movers 226,919.65 (27,890,137.84) (944,380.28) (42,425.95) 44,925.02 193,725.82 1 (28,638,293.24) (944,322.85) (787,818.24) 834,223.97 3,597,343.57 (25,938,866.79) (943,256.45) (206,161.45) 218,305.21 941,376.49 (25,928,602.99) (942,977.39) (71,528.61)
344 Generators 90.39 (33,798,646.41) (134,777.91) (16.90) 17.89 77.17 (33,933,346.17) (134,779.04) (313.81) 332.29 1,432.91 (34,066,673.81) (134,799.96) (82.12) 86.96 374.97 (34,201,093.96) (134,805.43) (28.49)
345 Accessory Electric Equipment 1,988.54 (35,478,138.21) (227,630.24) (371.79) 393.69 1,697.65 (35,704,048.90) (227,643.54) (6,903.79) 7,310.45 31,524.16 (35,899,761.62) (227,890.48) (1,806.63) 1,913.05 8,249.45 (36,119,296.23) (227,955.10) (626.82)
346 Misc Power Plant Equipment 2,056.13 (2,662,816.71) (20,681.49) (384.42) 407.07 1,755.36 (2,681,720.19) (20,691.43) (7,138.46) 7,558.95 32,595.71 (2,669,395.41) (20,876.07) (1,868.04) 1,978.07 8,529.86 (2,681,631.59) (20,924.39) (648.12)
TOTAL OTHER PRODUCTION PLANT 235,272.59 (152,203,245.99) (1,685,763.07) (43,987.65) 46,578.72 200,856.89 (153,685,561.10) (1,685,814.96) (816,817.93) 864,931.86 3,729,762.25 (151,593,499.88) (1,686,778.55) (213,750.28) 226,341.05 976,028.68 (152,291,658.99) (1,687,030.70) (74,161.59)
350.2 Land Rights&Easements 0.00 (10,479,315.01) (34,486.99) 0.00 0.00 0.00 (10,513,802.00) (34,512.06) 0.00 0.00 0.00 (10,548,314.06) (34,651.14) 0.00 1 0.00 0.00 (10,582,965.20) (34,669.57) 0.00
350.22 Transm-ROW Renewal Cost 0.00 (82,349.34) (3,694.04) 0.00 0.00 0.00 (86,043.38) (3,697.22) 0.00 0.D0 0.00 (89,740.60) (3,714.91) 0.00 1 0.00 0.00 (93,455.51) (3,717.26) 0.00
352 Structures and Improvements 28,741.15 (35,223,949.05) (169,787.09) (49.47) 4,050.41 8,994.90 (35,380,740.29) (169,924.43) (110.82) 9,073.21 20,149.26 (35,521,553.07) (170,232.07) (1.50) 123.10 273.37 (35,691,390.17) (170,236.25) (46.56)
353 Station Equipment 1,039,334.49 (126,515,318.46) (899,841.18) (1,862.95) 152,524.45 338,717.41 (126,925,780.73) (900,716.35) (5,103.03) 417,798.85 927,823.34 (126,485,977.92) (903,113.65) (233.86) 19,147.00 42,520.54 (127,327,657.90) (903,223.52) (1,841.49)
354 Towers and Fixtures 18,640.43 (82,378,586.43) (235,761.23) (42.04) 3,442.24 7,644.33 1 (82,603,303.13) (236,093.37) (233.29) 19,100.08 42,416.35 (82,778,113.36) (237,936.35) (30.91) 2,530.89 5,620.45 (83,007,929.29) (238,180.55) (59.69)
355 Poles and Fixtures 142,884.38 (82,735,179.00) (532,592.20) (322.28) 26,385.78 58,596.00 (83,183,111.70) (533,436.75) (1,788.24) 146,407.72 325,133.74 (83,246,795.23) (538,122.93) (236.95) 19,399.99 43,082.36 (83,722,672.76) (538,743.89) (457.55)
356 Overhead Conductors,Devices 133,718.08 (90,838,531.48) (341,187.91) (301.60) 24,693.08 54,836.96 (91,100,490.95) (341,595.70) (1,673.52) 137,015.40 304,275.81 (91,002,468.96) (343,858.47) (221.75) 18,155.44 40,318.55 (91,288,075.19) (344,158.30) (428.20)
359 Roads and Trails 0.00 (299,678.92) (232.93) 0.00 0.00 0.00 (299,911.85) (232.93) 0.00 0.00 0.00 (300,144.78) (232.93) 0.00 0.00 0.00 (300,377.71) (232.93) 0.00
TOTAL TRANSMISSION PLANT 1,363,318.53 (428,552,907.69) (2,217,583.57) (2,578.34) 211,095.96 468,789.60 (430,093,184.03) (2,220,208.81) (8,908.90) 729,395.26 1,619,798.51 (429,973,107.98) (2,231,862.45) (724.97) 59,356.42 131,815.26 (432,014,523.72) (2,233,162.27) (2,833.49)
3601 Distr-ROW Renewal Cost 0.00 (262,935.56) (2,424.17) 0.00 0.00 0.00 (265,359.73) (2,424.17) 0.00 0.00 0.00 (267,783.90) (2,424.17) 0.00 0.00 0.00 (270,208.07) (2,424.17) 0.00
361 Structures and improvements 33,720.19 (17,506,162.54) (120,412.61) (2,960.69) 13,388.49 39,634.36 (17,576,512.99) (121:585.52) (9,659.38) 43,680.56 129,308.93 (17,534,768.40) (125,412.21) (2,624.80)1 11,869.58 35,137.89 (17,615,797.94) (126,452.06) (843.12)
3621 Station Equipment 401,275.19 76,271,023.28 546,996.36 35,233.18 159,327.55 471,662.38 76,222,262.90 551,108.10 114,947.96 519,804.83 1,538,794.63 74,829,719.50 564,522.62 31,237.00 141,256.49 418,166.04 74,866,056.59 568,168.01 10,033.24
TOTAL SUBSTATION EQUIPMENT 434,995.36 94,040,121.39 669,833.14 38,193.87 172,716.04 511,296.74 94,064,135.62 675,117.79 124,607.34 563,485.39 1,668,103.57 92,632,271.80 692,359.00 33,861.80 153,126.07 453,303.92 92,752,062.60 697,044.24 10,876.36
363 Battery Storage 0.00 (4,706,989.88) (700,368.29) 0.00 0.00 0.00 (5,407,358.17) (700,368.29) 0.00 0.00 0.00 (6,107,726.46) (1,530,638.80) 0.00 0.00 0.00 (7,638,365.26) (1,530,638.80) 0.00
TOTAL BATTERY STORAGE 0.00 (4,706,989.88) (700,368.29) 0.00 0.00 0.00 (5,407,358.17) (700,368.29) 0.00 0.00 0.00 (6,107,726.46) (1,530,638.80) 0.00 0.00 0.00 (7,638,365.26) (1,530,638.80) 0.00
364 Poles,Towers and Fixtures 552,517.90 (147,279,566.48) (568,872.08) (51,513.74) 232,949.67 689,608.26 (146,977,394.37) (571,844.59) (112,848.59) 510,311.28 1,510,690.60 (145,641,085.68) (578,356.31) (28,275.34) 127,863.57 378,518.55 (145,741,335.20) (579,987.88) (57,305.97)
365 Overhead Conductors,Devices 305,525.06 (58,547,680.42) (310,653.69) (30,191.50) 136,528.63 404,170.00 (58,347,826.97) (311,956.75) (65,149.34) 294,611.09 872,146.52 (57,558,175.46) (314,768.58) (15,466.46) 69,940.69 207,047.62 (57,611,422.19) (315,436.11) (32,397.86)
366 Underground Conduit 85,795.23 (20,069,933.14) (113,113.63) (8,320.18) 37,624.57 111,381.21 (20,042,361.17) (113,619.18) (14,301.95) 64,674.66 191,458.45 (19,914,149.19) (114,488.21) (6,095.96)1 27,566.47 81,605.90 (19,925,560.99) (114,858.61) (10,237.08)
367 Underground Conductors,Device 240,007.76 (110,190,651.30) (670,471.58) (23,275.27) 105,252.80 311,583.20 (110,467,562.15) (674,052.37) (40,008.96) 180,924.05 535,595.17 (110,465,104.26) (680,207.57) (17,053.14) 77,115.79 228,288.31 (110,856,960.86) (682,831.12) (28,637.65)
368 Line Transformers 406,417.18 (205,699,599.98) (1,262,054.98) (54,112.25) 244,700.39 724,394.29 (206,046,672.53) (1,267,416.19) (108,811.33) 492,054.47 1,456,644.37 (205,474,201.21) (1,278,196.75) (20,141.71) 91,082.61 269,634.72 (206,411,822.34) (1,280,192.30) (50,032.78)
369 Services 10,036.80 (46,334,692.89) (100,961.34) (981.34) 4,437.72 13,137.13 (46,419,060.73) (101,076.40) (2,143.19) 9,691.71 28,690.68 (46,483,897.93) (101,327.70) (557.70) 2,521.95 7,465.82 (46,575,795.56) (101,393.09) (1,127.53)
37000 Meters 36,315.48 (5,208,242.42) (56,797.75) (4,868.51) 22,015.82 65,174.12 (5,182,718.75) (56,918.11) (8,360.56) 37,807.19 111,921.83 (5,098,268.40) (57,124.80) (2,116.08) 9,569.10 28,327.72 (5,119,612.46) (57,177.11) (4,296.42)
37010 Meters-AMI 330,856.38 (34,576,081.34) (443,589.66) (25,196.97) 113,942.94 337,308.88 (34,593,616.15) (445,705.06) (21,237.47) 96,037.70 284,303.45 (34,680,217.53) (447,488.05) (26,167.32) 118,330.94 350,298.81 (34,685,243.16) (449,684.91) (27,714.49)
3711 Installations,Cust Premises 38.23 (1,072,019.25) (20,378.78) (3.71) 16.79 49.70 (1,092,335.25) (20,379.01) (2.35) 10.62 31.43 (1,112,674.55) (20,379.16) (2.48) 11.19 33.13 (1,133,011.87) (20,379.32) (2.25)
373 Street Lighting,Signal System 72.64 885,449.68 19,730.42 18.01 81.43 241.07 904,875.61 19,730.95 184.84 835.85 2,474.38 921,481.17 19,736.43 0.00 0.00 0.00 941,217.60 19,736.43 106.95
TOTAL DISTRIBUTION LINES 1,967,582.66 629,863,916.90 3,566,623.91 198,481.48 897,550.76 2,657,047.85 630,074,423.68 3,582,698.61 373,048.58 1,686,958.62 4,993,956.87 627,349,255.38 3,612,073.56 115,876.19 524,002.31 1,551,220.58 629,001,982.24 3,621,676.88 211,858.98
390 Structures and Improvements 224,755.96 (36,811,014.89) (315,664.17) (10,532.11) 4,461.34 64,377.18 (37,068,372.65) (316,013.62) (44,195.98) 18,721.16 270,146.58 (37,139,714.51) (317,480.06) (20,764.11)1 8,795.56 126,920.01 (37,342,243.11) (318,169.02) (6,906.64)
391 Office Furniture,Equipment 156,034.56 (18,656,979.56) (582,840.31) (561.07) 11,061.16 400,766.76 (18,828,553.02) (583,864.35) (1,537.91) 30,318.79 1,098,507.00 (18,285,129.49) (588,883.17) (159.69)1 3,148.22 114,065.99 (18,756,958.14) (595,213.33) (641.40)
392 Transportation Equipment 946,945.23 (26,568,143.68) (557,714.38) (41,894.66) 17,746.33 256,079.80 (26,893,926.59) (559,030.39) (118,856.82) 50,347.05 726,508.65 (26,794,958.10) (562,763.98) (126,570.73)1 53,614.62 773,659.70 (26,657,018.48) (566,739.88) (139,912.83)
393 Stores Equipment 0.00 (1,630,212.34) (27,489.18) 0.00 0.00L1,21
0.00 (1,657,701.52) (27,518.34) 0.00 0.00 0.00 (1,685,219.86) (27,536.53) 0.00 0.00 0.00 (1,712,756.39) (27,536.53) 0.00
394 Tools,Shop,Garage Equipment 0.00 (5,478,665.01) (69,173.86) (38.87) 766.2827,763.70 (5,519,347.76) (69,215.76) (46.34) 913.58 33,100.81 (5,554,595.47) (69,476.58) (15.08) 297.24 10,769.51 (5,613,020.38) (69,623.18) 0.00
395 Laboratory Equipment 26,597.00 (7,306,351.38) (72,096.60) (5.58) 110.053,987.36 (7,374,356.15) (72,172.26) 0.00 0.00 0.00 (7,446,528.41) (72,360.32) (79.27) 1,562.69 56,619.09 (7,460,786.22) (72,231.67) (23.14)
396 Power Operated Equipment 2,860.22 (6,459,074.48) (84,221.64) (118.81) 50.33726.25 (6,542,638.35) (84,227.11) (254.43) 107.77 1,555.17 (6,625,456.95) (84,238.84) (3.30) 1.40 20.17 (6,709,677.53) (84,238.99) (66.03)
397 Communication Equipment 285,346.66 (35,824,692.18) (454,028.10) (234.30) 4,619.0867,358.03 (36,106,977.47) (459,366.27) (401.96) 7,924.43 287,117.16 (36,271,704.11) (462,251.75) (267.36) 5,270.74 190,968.81 (36,537,983.67) (463,441.84) (82.14)
398 Miscellaneous Equipment 0.00 4,675,463.37 67,159.37 0.00 0.000.00 4,742,622.74 67,390.66 190.74 3,760.34 136,244.18 4,670,199.62 69,011.33 108.34 2,135.94 77,388.99 4,659,794.36 68,938.39 0.00
TOTAL GENERAL EQUIPMENT PLANT 1,642,539.62 (143,410,596.89) (2,230,387.61) (53,385.40) 38,814.5721,0 99.08 (144,734,496.25) (2,238,798.76) (165,484.18) 112,093.12 2,553,179.55 (144,473,506.52) (2,254,002.56) (147,967.88) 74,826.41 1,350,412.27 (145,450,238.28) (2,266,132.83) (147,632.18)
108000 TOTAL 5,876,411.95 2 171 353 146.48 14 176 346.51 656 487.44 1,683,829.006,059.32 2 179 286 092.11 14 222 869.50 1 740 194.51 4,206,001.37 14 923 891.43 2 176 119 263.32 15 138 673.15 706 168.04 1,229,948.48 4,739,944.49 2 185 994 211.54 15175 228.52 504 346.84)
Total Reserve for Amortization and Depreciation 5,922,491.14 2 218 059 164.40 14 742 711.65 656 487.44 1,683,829.00 5,216,059.32 2 226 558 475.17 14 790 485.70 1 740 194.51 4,206,001.37 14 978 246.02 2 223 904 907.99 15 712 118.04 706 168.04 1,229,948.48 4,739,944.49 2 234 353 301.10 15 749 900.15 504 346.84)
108400 Reserve for Disallowed Costs 3,050,477.16 24,691.61 3,025,785.55 24,691.61 3,001,093.94 24,691.61 2,976,402.33 24,691.61
Regulatory Accumulated Reserve W/0,ARO 5,876,411.95 2,174,403,623.64 14,151,654.90 656,487.44 1,683,829.00 5,216,059.32 2,182,311,877.66 14,198,177.89 1,740,194.51 4,206,001.37 14,923,891.43 2,179,120,357.26 15,113,981.54 706,168.04 1,229,948.48 4,739,944.49 2,188,970,613.87 15,150,536.91 504,346.84)
317 Asset Retire Cost Steam Prod 0.00 (27,235,220.27) (40,931.64) 0.00 (27,276,151.91) (40,931.64) 0.00 (27,317,083.55) (40,931.64) 0.00 (27,358,015.19) (40,931.64)
374 lAsset Retirement Cost-Dist Pit 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
TOTAL ASSET RETIREMENT OBLIGATIONS 0.00 27,235,220.27 40,931.64 0.00 1 0.00 0.00 27,276,151.91 40,931.64 0.00 0.00 0.00 27,317,083.55 40,931.64 0.00 0.00 0.00 27,358,015.19 40,931.64 0.00
Total 108 5,876,411.95 2,201,638,843.91 14,192,586.54 656,487.44 1,683,829.00 1 5,216,059.32 2,209,588,029.57 14,239,109.53 1,740,194.51 4,206,001.37 14,923,891.43 2,206,437,440.81 15,154,913.18 706,168.04 1,229,948.48 1 4,739,944.49 2,216,328,629.06 15,191,468.55 504,346.84
RECON OF RESERVE:
Key Report Accum Rsv 12-31-23 (5,922,491.14) (5,216,059.32) (14,978,246.02) 4,739,944.49
Diff (46,079.19) 0.00 (54,354.59) 0.00
46,079.19 111 54,354.59
TB 108 0.00 0.00
Diff
TB 111
Diff
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 8 of 12
LARKIN Workpaper 1 -Accumulated Reserve.xlsx Accumulated Reserve
Accumulated Reserve

IDAHO POWER COMPANY
ACCUMULATED RESERVE FOR DEPRECIAI
Actuals for December 31,2023 thru January
Estimated February thru December 2024
Se-24 Oct-24 Dec-24
8/31/2024 9/30/2024 10/3112024
ACCT ACCOUNT DESCRIPTION Removal Retirements BALANCE Salvage Retirements BALANCE Expense Salvage Removal Retirements BALANCE Salvage Remov Retirements Expense Salvage
302 Franchises and Consents 0.00 (20,449,555.68) (127,237.34) 0.00 (20,576,793.02) (145,684.15) 0.00 (20,722,477.17) (147,664.39) 0.00 (20,870,141.56) (149,247.06)
3031 Miscellaneous Intangible Plant 0.00 (28,484,205.51) (448,773.38) 0.00 (28,932,978.89) (451,139.80) 0.00 (29,384,118.69) (528,135.05) 1,322,167.29 (28,590,086.45) (523,346.69)
TOTAL 111000 Total Accumulated Amortization 0.00 0.00 (48,933,761.19) (576,010.72) 0.00 0.00 0.00 (49,509,771.91) (596,823.95) 0.00 0.00 0.00 (50,106,595.86) (675,799.44) 0.00 0.00 1,322,167.29 (49,460,228.01) (672,593.75) 0.00
310 Land and Land Rights 0.00 0.00 (130,051.43) (198.53) 0.00 0.00 0.00 (130,249.96) (198.53) 0.00 0.00 0.00 (130,448.49) (198.53) 0.00 0.00 0.00 (130,647.02) (198.53) 0.00
311 Structures and Improvements 0.00 0.00 (32,218,300.38) (52,536.05) 0.00 0.00 0.00 (32,270,836.43) (52,536.05) 0.00 0.00 0.00 (32,323,372.48) (52,536.05) 0.00 0.00 0.00 (32,375,908.53) (52,536.05) 0.00
312 Boiler Plant Equipment 0.00 0.00 (102,594,084.65) (565,482.07) 0.00 0.00 0.00 (103,159,566.72) (565,482.07) 0.00 0.00 0.00 (103,725,048.79) (565,482.07) 0.00 0.00 0.00 (104,290,530.86) (565,482.07) 0.00
314 Turbogenerator Units 0.00 0.00 (42,069,414.69) (208,131.24) 0.00 0.00 0.00 (42,277,545.93) (208,131.24) 0.00 0.00 0.00 (42,485,677.17) (208,131.24) 0.00 0.00 0.00 (42,693,808.41) (208,131.24) 0.00
315 Accessory electric Equipment 0.00 0.00 (13,933,055.62) (21,690.37) 0.00 0.00 0.00 (13,954,745.99) (21,690.37) 0.00 0.00 0.00 (13,976,436.36) (21,690.37) 0.00 0.00 0.00 (13,998,126.73) (21,690.37) 0.00
316 Misc Power Plant Equipment 0.00 0.00 (767,943.89) (27,307.62) 0.00 1 0.00 0.00 (795,251.51) (27,307.62) 0.00 0.00 0.00 (822,559.13) (27,307.62) 0.00 0.00 0.00 (849,866.75) (27,307.62) 0.00
TOTAL STEAM PRODUCTION PLANT 0.00 0.00 (191,712,850.66) (875,345.88) 0.00 0.00 0.00 (192,588,196.54) (875,345.88) 0.00 0.00 0.00 (193,463,542.42) (875,345.88) 0.00 0.00 0.00 (194,338,888.30) (875,345.88) 0.00
331 Structures and Improvements 10,954.03 15,788.46 (122,695,915.46) (483,969.20) (545,330.20) 540,577.35 779,154.44 (122,405,483.07) (509,540.02) (60,002.52) 59,479.57 85,730.14 (122,829,815.90) (512,353.57) (55,670.68) 55,185.48 79,540.91 (123,263,113.76) (514,964.00) (186,551.34)
332 Reservoirs,Dams,Watenvays 4,667.58 6,727.56 (211,244,066.91) (443,825.73) (21,241.46) 21,056.33 30,349.28 (211,657,728.49) (444,566.03) (3,702.14) 3,669.87 1 5,289.52 (212,097,037.27) (444,695.05) (10,462.67) 10,371.48 14,948.81 (212,526,874.70) (445,059.69) (46,039.55)
333 Waterwheel,Turbines,Generalo 27,003.12 38,920.61 (151,150,745.13) (982,068.84) (45,765.24) 45,366.37 65,388.26 (152,067,824.58) (984,693.46) (13,430.69) 13,313.64 19,189.44 (153,033,445.65) (985,463.70) (55,685.85) 55,200.52 79,562.58 (153,939,832.10) (988,657.26) (254,131.02)
334 Accessory Electric Equipment 5,023.50 7,240.56 (34,041,106.84) (215,672.22) (8,513.89) 8,439.69 12,164.44 (34,244,688.82) (215,934.58) (2,498.57) 2,476.79 3,569.89 (34,457,075.29) (216,011.57) (10,359.46) 10,269.17 14,801.35 (34,658,375.80) (216,330.80) (47,277.02)
335 Misc Power Plant Equipment 8,835.79 12,735.36 (11,455,210.29) (82,900.09) (42,452.13) 42,082.13 60,654.56 (11,477,825.82) (83,191.93) (7,240.37) 7,177.26 10,344.86 (11,550,736.00) (83,241.70) (19,946.76) 19,772.92 28,499.45 (11,605,652.10) (83,378.82) (87,508.67)
336 Roads,Railroads and Bridges 3.57 5.15 (7,604,106.92) (58,280.90) (73.56) 72.91 105.09 (7,662,283.37) (59,467.39) (8.77) 8.69 12.53 (7,721,738.31) (59,608.81) (11.60) 11.50 16.58 (7,781,330.64) (59,796.01) (44.31)
TOTAL HYDRO PRODUCTION PLANT 56,487.59 81,417.69 (538,191,151.55) (2,266,716.98) (663,376.48) 657,594.78 947,816.08 (539,515,834.15) (2,297,393.41) (86,883.06) 86,125.82 124,136.38 (541,689,848.43) (2,301,374.40) (152,137.02) 150,811.07 217,369.67 (543,775,179.11) (2,308,186.58) (621,551.91)
341 Structures and Improvements 990.58 4,271.58 (49,478,402.57) (337,402.50) (462.45) 489.69 2,111.65 (49,813,666.17) (337,474.01) (411.59) 435.84 1,879.41 (50,149,236.52) (337,537.66) (1,065.78) 1,128.55 4,866.55 (50,481,844.86) (337,702.46) (10,339.75)
342 Fuel Holders,Producers,Acces 417.28 1,799.39 (4,236,850.76) (23,109.12) (194.81) 206.28 889.53 (4,259,058.88) (23,108.41) (173.38) 183.59 791.70 (4,281,365.38) (23,107.78) (448.95) 475.40 2,050.02 (4,302,396.69) (23,106.15) (4,355.59)
343 Prime Movers 75,741.93 326,614.64 (26,540,752.42) (942,880.57) (35,360.11) 37,442.97 161,461.69 (27,320,088.45) (942,832.70) (31,471.15) 33,324.93 1 143,703.90 (28,117,363.47) (942,790.10) (81,491.52) 86,291.70 372,107.39 (28,683,246.00) (942,679.80) (790,600.17)
344 Generators 30.17 130.10 (34,335,767.61) (134,807.33) (14.08) 14.91 64.31 (34,470,509.80) (134,808.27) (12.54) 13.27 57.24 (34,605,260.10) (134,809.10) (32.46) 34.37 148.22 (34,739,919.07) (134,811.27) (314.92)
345 Accessory Electric Equipment 663.74 2,862.18 (36,344,352.23) (227,977.52) (309.87) 328.12 1,414.92 (36,570,896.58) (227,988.61) (275.79) 292.03 1,259.30 (36,797,609.65) (227,998.47) (714.12) 756.19 3,260.84 (37,022,305.20) (228,024.01) (6,928.17)
346 Misc Power Plant Equipment 686.30 2,959.47 (2,699,558.33) (20,941.15) (320.40) 339.27 1,463.01 (2,719,017.60) (20,949.44) (285.16) 301.96 1,302.11 (2,738,648.13) (20,956.82) (738.40) 781.89 3,371.68 (2,756,189.78) (20,975.92) (7,163.67)
TOTAL OTHER PRODUCTION PLANT 78,530.00 338,637.36 (153,635,683.92) (1,687,118.19) (36,661.72) 38,821.24 1 167,405.11 (155,153,237.47) (1,687,161.44) (32,629.61) 34,551.62 148,993.66 (156,689,483.25) (1,687,199.93) (84,491.23) 89,468.10 385,804.71 (157,985,901.60) (1,687,299.61) (819,702.27)
350.2 Land Rights&Easements 0.00 0.00 (10,617,634.77) (34,705.16) 0.00 0.00 0.00 (10,652,339.93) (34,732.59) 0.00 0.00 0.00 (10,687,072.52) (35,116.27) 0.00 0.00 1 0.00 (10,722,188.79) (35,217.25) 0.00
350.22 Transm-ROW Renewal Cost 0.00 0.00 (97,172.77) (3,721.79) 0.00 0.00 0.00 (100,894.56) (3,725.28) 0.00 0.00 0.00 (104,619.84) (3,774.08) 0.00 0.00 1 0.00 (108,393.92) (3,786.92) 0.00
352 Structures and Improvements 3,812.35 8,466.24 (35,849,394.39) (170,365.51) (135.41) 11,086.32 24,619.85 (35,984,189.14) (170,741.42) (106.62) 8,729.00 19,384.86 (36,126,923.32) (171,037.40) (257.92) 21,116.68 46,894.68 (36,230,207.28) (171,753.40) (463.61)
353 Station Equipment 150,767.74 334,816.20 (127,747,138.97) (904,088.61) (5,052.53) 413,664.39 918,641.78 (127,323,973.94) (906,462.18) (3,812.21) 312,116.13 693,129.30 (127,229,002.90) (908,253.08) (11,131.06) 911,330.07 2,023,828.71 (125,213,228.25) (913,482.22) (18,203.06)
354 Towers and Fixtures 4,887.10 10,852.98 (83,230,429.44) (238,652.11) (46.02) 3,767.59 8,366.84 (83,456,993.14) (239,015.65) (643.56) 52,690.14 117,011.19 (83,526,951.02) (244,099.74) (169.39) 13,868.20 30,797.70 (83,726,554.25) (245,437.89) (1,106.88)
355 Poles and Fixtures 37,461.04 83,191.30 (84,141,221.85) (539,942.93) (352.74) 28,879.67 64,134.28 (84,588,503.57) (540,867.30) (4,933.09) 403,885.33 896,925.01 (83,833,493.62) (553,794.78) (1,298.40) 106,303.85 236,073.39 (84,046,209.57) (557,197.33) (8,484.58)
356 Overhead Conductors,Devices 35,057.85 77,854.43 (91,519,749.41) (344,737.26) (330.11) 27,026.98 60,019.95 (91,777,769.85) (345,183.60) (4,616.62) 377,975.34 839,385.61 (90,910,209.12) (351,425.73) (1,215.11) 99,484.26 220,928.84 (90,942,436.86) (353,068.68) (7,940.28)
359 Roads and Trails 0.00 0.00 (300,610.64) (232.93) 0.00 1 0.00 0.00 (300,843.57) (232.93) 0.00 0.00 0.00 (301,076.50) (232.93) 0.00 0.00 0.00 (301,309.43) (232.93) 0.00
TOTAL TRANSMISSION PLANT 231,986.08 515,181.15 (433,503,352.24) (2,236,446.30) (5,916.81) 484,424.95 1,075,782.69 (434,185,507.71) (2,240,960.95) (14,112.10) 1,155,395.94 2,565,835.97 (432,719,348.85) (2,267,734.01) (14,071.88) 1,152,103.06 2,558,523.33 (431,290,528.36) (2,280,176.62) (36,198.41)
360 Distr-ROW Renewal Cost 0.00 0.00 (272,632.24) (2,424.17) 0.00 0.00 0.00 (275,056.41) (2,424.17) 0.00 0.00 0.00 (277,480.58) (2,424.17) 0.00 0.00 0.00 (279,904.75) (2,424.17) 0.00
361 Structures and improvements 3,812.67 11,286.78 (17,727,993.67) (126,786.07) (2,235.49) 10,109.08 29,926.23 (17,816,979.93) (127,671.69) (2,557.71) 11,566.20 34,239.78 (17,901,403.35) (128,684.96) (2,581.76) 11,674.95 34,561.72 (17,986,433.41) (129,707.75) (5,287.22)
362 Station Equipment 45,371.20 134,313.80 75,264,572.84 569,338.90 26,602.74 120,299.93 356,127.69 75,384,086.86 572,443.46 30,437.02 137,638.89 407,456.75 75,441,871.70 575,995.48 30,723.20 138,933.04 411,287.87 75,498,369.47 579,580.90 62,919.65
TOTAL SUBSTATION EQUIPMENT 49,183.87 145,600.58 93,265,198.75 698,549.14 28,838.23 130,409.01 386,053.92 93,476,123.19 702,539.32 32,994.73 149,205.09 441,696.52 93,620,755.63 707,104.61 33,304.96 150,607.99 445,849.59 93,764,707.63 711,712.82 68,206.87
363 Battery Storage 0.00 0.00 (9,169,004.06) (1,530,638.80) 0.00 0.00 0.00 (10,699,642.86) (1,530,638.80) 0.00 0.00 0.00 (12,230,281.66) (1,530,638.80) 0.00 0.00 0.00 (13,760,920.46) (1,530,638.80) 0.00
TOTAL BATTERY STORAGE 0.00 0.00 (9,169,004.06) (1,530,638.80) 0.00 0.00 0.00 (10,699,642.86) (1,530,638.80) 0.00 0.00 0.00 (12,230,281.66) (1,530,638.80) 0.00 0.00 0.00 (13,760,920.46) (1,530,638.80) 0.00
364 Poles,Towers and Fixtures 259,142.65 767,148.16 (145,352,338.25) (583,294.62) (75,913.78) 343,288.83 1,016,248.74 (144,652,009.07) (587,675.08) (29,733.26) 134,456.45 398,035.66 (144,736,925.30) (589,390.78) (37,935.90) 171,549.49 507,843.36 (144,684,859.13) (591,579.80) (100,484.36)
365 Overhead Conductors,Devices 146,505.98 433,706.27 (57,379,043.91) (316,834.39) (43,879.38) 198,426.43 587,408.03 (56,953,923.22) (318,728.22) (16,263.41) 73,544.56 217,716.28 (56,997,654.01) (319,430.14) (22,060.28) 99,758.54 295,318.35 (56,944,067.54) (320,382.26) (58,420.34)
366 Underground Conduit 46,292.98 137,042.57 (19,867,321.13) (115,480.65) (18,591.43) 84,072.07 248,881.21 (19,668,439.93) (116,610.31) (14,125.31) 63,875.88 189,093.78 (19,546,205.89) (117,468.60) (46,079.30) 208,374.66 616,858.08 (18,884,521.05) (120,268.51) (17,135.21)
367 Underground Conductors,Device 129,501.98 383,368.81 (111,055,558.85) (687,236.89) (52,008.54) 235,187.22 696,232.15 (110,863,384.90) (695,238.17) (39,514.82) 178,689.49 528,980.14 (110,890,468.26) (701,317.35) (128,904.47) 582,917.40 1,725,628.77 (109,412,143.91) (721,148.72) (47,934.84)
368 Line Transformers 226,252.65 669,782.85 (206,846,011.92) (1,285,149.33) (79,477.20) 359,402.93 1,063,951.85 (206,787,283.67) (1,293,023.59) (25,171.76) 113,828.94 336,971.41 (207,654,678.68) (1,295,517.50) (59,891.41) 270,834.23 801,759.13 (207,937,494.23) (1,301,451.28) (104,005.97)
369 Services 5,098.80 15,094.14 (46,658,123.24) (101,525.29) (1,758.49) 7,952.06 23,540.72 (46,729,914.24) (101,731.48) (785.76) 3,553.26 10,518.84 (46,818,359.38) (101,823.61) (1,823.74) 8,247.11 24,414.18 (46,889,345.44) (102,037.45) (2,104.41)
37000 Meters 19,428.81 57,515.71 (5,104,141.46) (57,283.33) (6,512.59) 29,450.51 87,183.26 (5,051,303.61) (57,444.33) (2,381.14) 10,767.74 31,876.08 (5,068,485.26) (57,503.19) (4,833.51) 21,857.56 64,705.62 (5,044,258.78) (57,622.69) (8,305.74)
37010 Meters-AMI 125,327.35 371,010.51 (34,666,304.69) (452,011.68) (25,978.26) 117,475.99 347,767.88 (34,679,050.77) (454,192.67) (26,229.92) 118,614.00 351,136.76 (34,689,722.59) (456,394.80) (24,434.22) 110,493.72 327,098.04 (34,732,959.85) (458,446.16) (24,597.24)
3711 Installations,Cust Premises 10.19 30.16 (1,153,353.09) (20,379.46) (1.75) 7.89 23.36 (1,173,703.05) (20,379.57) (2.67) 12.05 35.68 (1,194,037.56) (20,379.74) (3.71) 16.79 49.70 (1,214,354.52) (20,379.97) (3.74)
373 Street Lighting,Signal System 483.62 1,431.68 959,145.68 19,739.60 37.59 169.98 503.19 978,249.70 19,740.72 35.54 160.73 475.82 997,389.4119,741.77 53.91 243.77 721.63 1,016,219.69 19,743.37 42.39
TOTAL DISTRIBUTION LINES 958,045.01 2,836,130.86 629,041,342.23 3,638,935.24 304,159.01 1,375,433.91 4,071,740.41 627,537,262.16 3,664,764.14 154,243.59 697,503.10 2,064,840.45 (628,593,926.34)l3,678,967.48 326,020.45 1,474,293.27 4,364,396.87 626,760,224.13 3,713,060.21 363,034.24
390 Structures and Improvements 2,925.61 42,216.64 (37,622,176.53) (318,398.19) (25,805.30) 10,930.97 157,734.11 (37,797,714.93) (319,254.41) (24,244.14) 10,269.68 148,191.58 (37,982,752.22) (320,058.84) (14,821.32) 6,278.23 90,594.88 (38,220,759.27) (320,550.62) (139,496.25)
391 Office Furniture,Equipment 12,644.78 458,144.38 (18,882,023.71) (598,984.75) (63.08) 1,243.59 45,057.52 (19,434,770.43) (610,687.39) (49.78) 981.44 35,559.33 (20,008,966.83) (616,972.17) (31.41) 619.24 22,436.37 (20,602,914.80) (628,116.07) (1,470.87)
392 Transportation Equipment 59,266.26 855,212.92 (26,449,192.01) (571,134.88) (131,801.39) 55,830.30 805,631.99 (26,290,666.00) (575,275.09) (145,268.31) 61,534.80 887,948.08 (26,061,726.51) (579,838.32) (113,672.58) 48,151.04 694,820.18 (26,012,266.20) (583,409.06) (436,405.77)
393 Stores Equipment 0.00 0.00 (1,740,292.92) (27,645.64) 0.00 0.00 0.00 (1,767,938.56) (27,952.03) (6.50) 128.09 4,640.77 (1,791,128.23) (28,009.02) 0.00 0.00 0.00 (1,819,137.25) (28,103.11) 0.00
394 Tools,Shop,Garage Equipment 0.00 0.00 (5,682,643.56) (69,921.32) (9.21) 181.54 6,577.62 (5,745,814.93) (70,045.82) (120.18) 2,369.34 85,845.71 (5,727,765.88) (69,973.73) (2.48) 48.81 1,768.44 (5:795,924.84) (70,080.49) (192.28)
395 Laboratory Equipment 456.25 16,530.83 (7,516,053.95) (72,205.48) 0.00 0.00 0.00 (7,588,259.43) (72,738.09) (99.57) 1,962.91 1 71,119.75 (7,588,014.43) (72,680.65) (300.87) 5,931.52 214,910.18 (7,440,154.25) (72,079.45) (19.27)
396 Power Operated Equipment 27.97 403.59 (6,793,550.99) (84,242.03) (167.70) 71.04 1,025.08 (6,876,864.60) (84,249.76) (179.66) 76.10 1,098.15 (6,960,119.77) (84,258.04) (88.14) 37.33 538.73 (7,043,889.89) (84,262.10) (957.37)
397Communicetion Equipment 1,619.40 58,673.89 (36,941,214.36) (464,077.70) (243.43) 4,799.09 173,880.15 (37,226,856.25) (467,482.66) (226.10) 4,457.37 161,498.78 (37,528,608.86) (474,415.81) (300.15) 5,917.33 214,395.87 (37,783,011.62) (475,756.10) (1,075.59)
398 Miscellaneous Equipment 0.00 0.00 4,728,732.75 69,300.71 54.05 1,065.54 38,606.64 4,758,415.33 69,513.56 0.00 0.00 0.00 4,827,928.89 70,184.52 140.83 2,776.45 100,596.00 4,794,881.79 70,330.96 445.67
TOTAL GENERAL EQUIPMENT PLANT 76,940.27 1,431,182.24 (146,355,880.78) (2,275,910.70) (158,144.16) 74,122.07 1,228,513.11 (147,487,300.46) (2,297,198.81) (170,194.24) 81,779.73 1,395,902.15 (148,477,011.63) (2,316,391.10) (129,357.78) 69,759.95 1,340,060.65 (149,512,939.91) (2,332,687.96) (580,063.07)
108000 TOTAL 1,451,172.82 5,348,149.88 2 194 874 464.20 15 209 661.23 1 197 096.41 2,760,805.96 7,877 311.31 2 200,643 104.56 15 296 002.75 491 057.33 2,204,561.30 6,741,405.13 2 207 484 198.22 15 364 756.21 739 383.32 3,087,043.44 9,312,004.81 2 211 189 289.50 15 439 108.48 2 488 756.77
Total Reserve for Amortization and Depreciation 1,451,172.82 5,348,149.88 2 243 808 225.39 15 785 671.95 1 197 096.41 2,760,805.96 7,877,311.31 2 250 152 876.47 15 892 826.70 491 057.33 2 204 561.30 6,741,405.13 2 257 590 794.08 16 040 555.65 739 383.32 3,087,043.44 10,634,172.10 2 260 649 517.51 16 111 702.23 2 488 756.77
108400 Reserve for Disallowed Costs 2,951,710.72 24,691.61 2,927,019.11 24,691.61 2,902,327.50 24,691.61 2,877,635.89 24,691.61
Regulatory Accumulated Reserve W/0,ARO 1,451,172.82 5,348,149.88 2,197,826,174.92 15,184,969.62 1,197,096.41 2,760,805.96 7,877,311.31 2,203,570,123.67 15,271,311.14 491,057.33 2,204,561.30 6,741,405.13 2,210,386,525.72 15,340,064.60 739,383.32 3,087,043.44 9,312,004.81 2,214,066,925.39 15,414,416.87 2,488,756.77
317 Asset Retire Cost Steam Prod 0.00 (27,398,946.83) (40,931.64) 0.00 (27,439,878.47) (40,931.64) 0.00 (27,480,810.11) (40,931.64) 0.00 (27,521,741.75) (40,931.64)
374 lAsset Retirement Cost-Dist Pit 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
TOTAL ASSET RETIREMENT OBLIGATIONS 0.00 0.00 27,398,946.83 40,931.64 0.00 0.00 0.00 27,439,878.47 40,931.64 0.00 0.00 0.00 27,480,810.11 40,931.64 0.00 i 0.00 i 0.00 27,521,741.75 40,931.64 0.00
Total 108 1,451,172.82 1 5,348,149.88 2,225,225,121.75 15,225,901.26 1,197,096.41 2,760,805.96 1 7,877,311.31 2,231,010,002.14 15,312,242.78 491,057.33 2,204,561.30 6,741,405.13 2,237,867,335.83 15,380,996.24 739,383.32 3,087,043.44 9,312,004.81 2,241,588,667.14 15,455,348.51 2,488,756.77
RECON OF RESERVE:
Key Report Accum Rsv 12-31-23 (5,348,149.88) (7,877,311.31) (6,741,405.13) (10,634,172.10)
Diff 0.00 0.00 0.00 (1,322,167.29)
111 1,322,167.29
TB 108
Diff
TB 111
Diff
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 9 of 12
LARKIN Workpaper 1 -Accumulated Reserve.xlsx Accumulated Reserve
Accumulated Reserve

IDAHO POWER COMPANY
ACCUMULATED RESERVE FOR DEPRECIAI
Actuals for December 31,2023 thru January
Estimated February thru December 2024
Average Ksv
Ending Bal for
12/31/2024 2023&2024
ACCT ACCOUNT DESCRIPTION Removal Retirements BALANCE
302 Franchises and Consents 0.00 (21,019,388.62) (20,234,794.83)
3031 Miscellaneous Intangible Plant 0.00 (29,113,433.14) (27,075,399.39)
TOTAL 111000 Total Accumulated Amortization 0.00 0.00 (50,132,821.76) (47,310,194.22)
310 Land and Land Rights 0.00 0.00 (130,845.55) (129,654.37)
311 Structures and Improvements 0.00 0.00 (32,428,444.58) (32,113,228.28)
312 Boiler Plant Equipment 0.00 0.00 (104,856,012.93) (101,463,120.51)
314 Turbogenerator Units 0.00 0.00 (42,901,939.65) (41,653,152.21)
315 Accessory electric Equipment 0.00 0.00 (14,019,817.10) (13,889,674.88)
316 Misc Power Plant Equipment 0.00 0.00 (877,174.37) (713,328.65)
TOTAL STEAM PRODUCTION PLANT 0.00 0.00 (195,214,234.18) (189,962,158.90)
331 Structures and Improvements 184,925.45 266,539.99 (123,513,163.66) (121,384,818.09)
332 Reservoirs,Dams,Watenvays 45,638.29 65,780.18 (212,906,555.47) (210,427,069.97)
333 Waterwheel,Turbines,Generalo 251,916.14 363,096.19 (154,567,608.05) (149,529,575.96)
334 Accessory Electric Equipment 46,864.97 67,548.25 (34,807,570.41) (33,663,695.26)
335 Misc Power Plant Equipment 86,745.98 125,030.25 (11,564,763.36) (11,340,237.79)
336 Roads,Railroads and Bridges 43.92 63.31 (7,841,063.74) (7,491,242.19)
TOTAL HYDRO PRODUCTION PLANT 616,134.75 888,058.16 (545,200,724.68) (533,836,639.26)
341 Structures and Improvements 10,948.80 47,213.48 (50,771,724.79) (48,790,890.31)
342 Fuel Holders,Producers,Acces 4,612.15 19,888.53 (4,305,357.75) (4,197,045.69)
343 Prime Movers 837,169.77 3,610,046.42 (25,969,309.77) (25,125,812.26)
344 Generators 333.47 1,437.97 (34,873,273.81) (34,061,109.21)
345 Accessory Electric Equipment 7,336.27 31,635.48 (37,218,285.64) (35,900,102.23)
346 Misc Power Plant Equipment 7,585.64 32,710.81 (2,744,032.92) (2,669,425.38)
TOTAL OTHER PRODUCTION PLANT 867,986.10 3,742,932.69 (155,881,984.68) (150,744,385.08)
350.2 Land Rights&Easements 0.00 0.00 (10,757,406.04) (10,549,744.20)
350.22 Transm-ROW Renewal Cost 0.00 0.00 (112,180.84) (89,919.97)
352 Structures and Improvements 37,957.01 84,292.71 (36,280,174.57) (35,371,012.97)
353 Station Equipment 1,490,334.23 3,309,647.40 (121,344,931.90) (124,184,120.21)
354 Towers and Fixtures 90,623.55 201,251.50 (83,681,223.98) (82,610,569.24)
355 Poles and Fixtures 694,656.04 1,542,651.65 (82,374,583.79) (81,865,491.55)
356 Overhead Conductors,Devices 650,092.57 1,443,687.70 (89,209,665.55) (89,688,777.35)
359 Roads and Trails 0.00 0.00 (301,542.36) (300,144.78)
TOTAL TRANSMISSION PLANT 2,963,663.40 6,581,530.96 (424,061,709.03) (424,659,780.28)
360 Distr-ROW Renewal Cost 0.00 0.00 (282,328.92) (267,783.90)
361 Structures and improvements 23,909.28 70,779.40 (18,026,739.70) (17,601,338.17)
362 Station Equipment 284,528.23 842,297.90 75,014,043.88 75,379,304.68
TOTAL SUBSTATION EQUIPMENT 308,437.51 913,077.30 93,323,112.50 93,248,426.75
363 Battery Storage 0.00 0.00 (15,291,559.26) (8,767,940.50)
TOTAL BATTERY STORAGE 0.00 0.00 (15,291,559.26) (8,767,940.50)
364 Poles,Towers and Fixtures 454,399.15 1,345,172.13 (143,577,352.01) (145,901,397.29)
365 Overhead Conductors,Devices 264,181.93 782,066.11 (56,276,622.10) (57,693,929.75)
366 Underground Conduit 77,486.92 229,386.96 (18,715,050.88) (19,349,053.89)
367 Underground Conductors,Device 216,765.58 641,698.00 (109,322,763.89) (109,101,791.44)
368 Line Transformers 470,324.20 1,392,315.58 (207,480,311.70) (205,536,748.71)
369 Services 9,516.31 28,171.43 (46,955,799.56) (46,479,848.45)
37000 Meters 37,559.28 111,187.93 (4,961,440.00) (5,083,548.74)
37010 Meters-AMI 111,230.91 329,280.36 (34,775,491.98) (34,541,270.41)
3711 Installations,Cust Premises 16.93 50.12 (1,234,671.17) (1,126,348.64)
373 Street Lighting,Signal System 191.67 567.41 1,035,246.37 930,273.76
TOTAL DISTRIBUTION LINES 1,641,672.88 4,859,896.03 624,334,749.67 625,744,211.07
390 Structures and Improvements 59,089.79 852,666.54 (37,769,049.81) (37,085,259.20)
391 Office Furniture,Equipment 28,997.06 1,050,617.97 (20,152,886.71) (19,669,852.16)
392 Transportation Equipment 184,858.93 2,667,516.96 (24,179,705.14) (25,735,829.21)
393 Stores Equipment 0.00 0.00 (1,847,240.36) (1,687,096.93)
394 Tools,Shop,Garage Equipment 3,790.66 137,342.63 (5,725,064.32) (5,465,957.81)
395 Laboratory Equipment 379.85 13,762.73 (7,498,110.39) (7,273,303.50)
396 Power Operated Equipment 405.54 5,851.90 (7,122,851.92) (6,568,599.84)
397 Communication Equipment 21,204.48 768,278.37 (37,470,360.46) (36,302,415.07)
3981 Miscellaneous Equipment 8,785.98 318,332.49 4,538,539.95 4,516,629.80
TOTAL GENERAL EQUIPMENT PLANT 307,512.29 5,814,369.59 (146,303,809.06) (144,304,943.52)
108000 TOTAL 6,705,406.93 22,799,864.75 2 199 611 883.07 2 171 268 485.36
Total Reserve for Amortization and Depreciation 6,705,406.93 22,799,864.75 2 249 744 704.83 2 218 578 679.57
108400 Reserve for Disallowed Costs 2,852,944.28 3,001,093.94
Regulatory Accumulated Reserve W/O ARO 6,705,406.93 22,799,864.75 2,202,464,827.35 2,174,269,579
317 Asset Retire Cost Steam Prod 0.00 (27,562,673.39)
374 lAsset Retirement Cost-Dist Pit 0.00 1 0.00
TOTAL ASSET RETIREMENT OBLIGATIONS 0.00 0.00 27,562,673.39
Total 108 6,705,406.93 1 22,799,864.75 2,230,027,500.74
RECON OF RESERVE:
Key Report Accum Rsv 12-31-23 (22,799,864.75)
Diff 0.00
TB 108
Diff
TB 111
Diff
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 10 of 12
LARKIN Workpaper 1 -Accumulated Reserve.xlsx Accumulated Reserve
Accumulated Reserve

IDAHO POWER COMPANY
INCREMENTAL ACCUMULATED RESERVE
December 31, 2024
Account Account Description 2023 GRC Settled 2024 Reserve Incremental 2024 TY
302 Franchises and Consents 18,778,074 20,234,794.83 1,456,720.41
303 Miscellaneous Intangible Plant 23,137,432 27,075,399.39 3,937,967.02
Total Amortization Expense 41,915,507 47,310,194 5,394,687
310 Land and Land Rights
311 Structures and Improvements
312 Boiler Plant Equipment
314 Turbogenerator Units
315 Accessory electric Equipment
316 Misc Power Plant Equipment
TOTAL STEAM PRODUCTION PLANT 151,132,377 189,962,158.90 38,829,782.22
331 Structures and Improvements
332 Reservoirs, Dams, Waterways
333 Waterwheel, Turbines, Generator
334 Accessory Electric Equipment
335 Misc Power Plant Equipment
336 Roads, Railroads and Bridges
TOTAL HYDRO PRODUCTION PLANT 510,334,076 533,836,639.26 23,502,563.65
341 Structures and Improvements
342 Fuel Holders, Producers, Access
343 Prime Movers
344 Generators
345 Accessory Electric Equipment
346 Misc Power Plant Equipment
TOTAL OTHER PRODUCTION PLANT 163,775,655 150,744,385.08 (13,031,269.92)
350 Land Rights & Easements 10,201,355 10,639,664.17 438,308.79
352 Structures and Improvements 34,251,518 35,371,012.97 1,119,494.83
353 Station Equipment 123,269,932 124,184,120.21 914,187.72
354 Towers and Fixtures 80,447,813 82,610,569.24 2,162,755.79
355 Poles and Fixtures 80,583,039 81,865,491.55 1,282,452.49
356 Overhead Conductors, Devices 90,332,368 89,688,777.35 (643,590.56)
359 Roads and Trails 297,401 300,144.78 2,744.02
TOTAL TRANSMISSION PLANT 419,383,427 424,659,780 5,276,353
360 Distr- ROW Renewal Cost 239,442 267,783.90 28,341.88
361 Structures and improvements 16,778,902 17,601,338.17 822,436.06
362 Station Equipment 72,249,574 75,379,304.68 3,129,730.44
TOTAL SUBSTATION EQUIPMENT 89,267,918 93,248,427 3,980,508
363 Battery Storage 3,548,486 8,767,940.50 5,219,454.59
TOTAL BATTERY STORAGE
364 Poles, Towers and Fixtures 144,727,473 145,901,397.29 1,173,924.12
365 Overhead Conductors, Devices 56,593,997 57,693,929.75 1,099,933.12
366 Underground Conduit 18,880,710 19,349,053.89 468,343.65
367 Underground Conductors, Device 105,526,973 109,101,791.44 3,574,818.84
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 11 of 12
Accumulated Reserve

368 Line Transformers 199,797,737 205,536,748.71 5,739,011.37
369 Services 45,500,962 46,479,848.45 978,886.33
370 Meters 37,281,576 39,624,819.15 2,343,242.91
371 Installations, Cust Premises 1,185,775 1,126,348.64 (59,426.18)
373 Street Lighting, Signal System 33,016 930,273.76 897,257.71
TOTAL DISTRIBUTION LINES 609,528,219 625,744,211 16,215,992
390 Structures and Improvements 36,044,691 37,085,259.20 1,040,568.62
391 Office Furniture, Equipment 18,757,637 19,669,852.16 912,215.09
392 Transportation Equipment 23,975,721 25,735,829.21 1,760,108.17
393 Stores Equipment 1,468,592 1,687,096.93 218,504.77
394 Tools, Shop, Garage Equipment 5,026,782 5,465,957.81 439,176.14
395 Laboratory Equipment 6,860,809 7,273,303.50 412,494.05
396 Power Operated Equipment 5,419,822 6,568,599.84 1,148,778.23
397 Communication Equipment 33,453,398 36,302,415.07 2,849,017.28
398 Miscellaneous Equipment 4,396,481 4,516,629.80 120,148.49
TOTAL GENERAL EQUIPMENT PLANT 135,403,933 144,304,944 8,901,011
Depreciation Expense on Disallowed Costs 3,297,393 3,001,093.94 (296,299.32)
Total Accum Provision Depreciation 2,085,671,484 2,174,269,579 88,598,095
Depreciation and Amortization Exp 2,127,586,991 2,221,579,774 93,992,783
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 12 of 12
Accumulated Reserve

IDAHO POWER COMPANY
Depreciation and Amortization Expense
Actuals for December 31,2023 thru January 31,2024
Estimated February thru December 2024
January 2024
Expense
Adj Plant Balance Actuals Adj'd Exp Accrual Monthly Reserve Adjusted Plant Bal Expense
ACCT ACCOUNT DESCRIPTION @ 12/31/2023 12/31/23 Bridger Coal Exp Valmy Exp 12/31/23 Expense Bridger Exp Coal Valmy Exp Rate Adj Expense 1/31/2024 2/28/2024
302 Franchises and Consents 54,064,548.50 1,435,591.45 1,435,591.45 123,345.65 0.00 0.00 2.73 123,345.65 54,081,603.40 123,035.65
3031 Miscellaneous Intangible Plant 61 504 910.47 4,758,363.59 4,758,363.59 472,420.58 0.00 0.00 8.46 472,420.58 61,509,539.34 433,642.25
Total Amortization Expense 115,569,458.97 6,193,955.04 0.00 0.00 6,193,955.04 595,766.23 0.00 0.00 0.00 595,766.23 115,591,142.74 556,677.90
310 Land and Land Rights 148,899.77 28,167.53 (740.05) (25,045.08) 2,382.40 3,068.78 (133.98) (2,736.27) 1.60 198.53 148,899.77 198.53
311 Structures and Improvements 37,303,704.94 4,165,003.06 (609,794.14) (2,994,838.69) 560,370.23 338,776.96 (85,572.92) (200,667.99) 1.69 52,536.05 37,303,704.94 52,536.05
312 Boiler Plant Equipment 185,403,956.25 33,213,710.56 (15,752,906.60) (11,454,682.02) 6,006,121.94 3,941,859.35 (2,550,071.23) (827,972.11) 3.66 563,816.01 185,403,956.25 563,816.01
314 Turbogenerator Units 56,378,666.21 7,848,851.40 (2,354,433.92) (3,637,352.18) 1,857,065.30 853,725.05 (346,982.10) (298,611.71) 4.431 208,131.24 56,378,666.21 208,131.24
315 Accessory electric Equipment 16,473,701.28 2,322,669.34 (422,340.31) (1,681,377.65) 218,951.38 194,299.22 (55,133.64) (117,475.21) 1.58 21,690.37 16,473,701.28 21,690.37
3161 Misc Power Plant Equipment 8,423,945.60 1,432,071.43 355,519.62 745,534.67 331,017.14 139,608.37 58,627.98 53,672.77 3.89 27,307.62 8,423,945.60 27,307.62
TOTAL STEAM PRODUCTION PLANT 304,132,874.05 49,010,473.32 19,495,734.65 20,538,830.29 8,975,908.38 5,471,337.73 3,096,521.85 1,501,136.06 0.00 873,679.82 304,132,874.05 873,679.82
331 Structures and Improvements 268,903,107.87 5,172,365.75 5,172,365.75 451,554.39 0.00 0.00 2.11 451,554.39 268,915,952.17 472,843.88
332 Reservoirs,Dams,Waterways 312,287,739.29 5,202,353.69 5,202,353.69 444,087.83 0.00 0.00 1.69 444,087.83 312,301,787.62 439,825.02
333 Waterwheel,Turbines,Generato 398,767,042.05 10,871,076.00 10,871,076.00 988,437.12 0.00 0.00 2.841 988,437.12 398,744,745.62 943,695.90
334 Accessory Electric Equipment 76,190,449.29 2,472,200.97 2,472,200.97 214,259.05 0.00 0.00 3.34 214,259.05 76,108,899.93 211,836.44
335 Misc Power Plant Equipment 33,078,416.73 951,964.50 951,964.50 81,392.16 0.00 0.00 2.95 81,392.16 33,114,816.45 81,407.26
336 Roads,Railroads and Bridges 19 342 200.77 650,147.62 650,147.62 59,988.06 0.00 0.00 3.52 59,988.06 19,405,886.63 56,923.93
TOTAL HYDRO PRODUCTION PLANT 1,108,568,956.00 25,320,108.53 0.00 0.00 25,320,108.53 2,239,718.61 0.00 0.00 0.00 2,239,718.61 1,108,592,088.42 2,206,532.43
341 Structures and Improvements 154,940,383.08 4,006,984.08 4,006,984.08 334,339.54 0.00 0.00 2.59 334,339.54 154,968,517.17 334,473.72
342 Fuel Holders,Producers,Acces 10,438,247.49 277,475.11 277,475.11 23,122.93 0.00 0.00 2.661 23,122.93 10,438,247.49 23,138.12
343 Prime Movers 294,719,247.73 10,486,103.10 10,486,103.10 959,190.17 0.00 0.00 3.85 959,190.17 294,495,853.26 944,840.86
344 Generators 72,448,963.87 1,592,364.64 1,592,364.64 146,014.02 0.00 0.00 2.39 146,014.02 67,666,380.45 134,768.87
345 Accessory Electric Equipment 93,819,601.05 2,726,339.37 2,726,339.37 227,344.85 0.00 0.00 2.91 227,344.85 93,824,159.03 227,523.59
346 Misc Power Plant Equipment 7,774,242.07 224,752.02 224,752.02 20,382.53 0.00 0.00 3.18 20,382.53 7,774,242.07 20,601.74
TOTAL OTHER PRODUCTION PLANT 634,140,685.29 19,314,018.32 0.00 0.00 19,314,018.32 1,710,394.04 0.00 0.00 0.00 1,710,394.04 629,167,399.47 1,685,346.90
350.2 Land Rights&Easements 37,340,279.85 405,311.07 405,311.07 34,228.59 0.00 0.00 1.10 34,228.59 37,386,633.86 34,271.08
350.22 Transm-ROW Renewal Cost 1,321,169.55 10,518.45 10,518.45 3,666.25 0.00 0.00 3.331 3,666.25 1,321,287.49 3,666.57
352 Structures and Improvements 105,772,696.00 1,954,692.03 (2,630.95) (14,906.38) 1,937,154.70 168,936.76 (476.50) (991.84) 1.90 167,468.42 106,327,945.16 168,352.58
353 Station Equipment 484,276,729.43 10,755,730.74 (225,811.89) (311,293.69) 10,218,625.16 940,230.52 (40,222.43) (21,916.62) 2.18 878,091.47 490,351,466.19 890,805.16
354 Towers and Fixtures 232,601,840.66 2,792,926.96 2,792,926.96 232,601.84 0.00 0.00 1.20 232,601.84 232,900,157.89 232,900.16
355 Poles and Fixtures 245,301,825.40 6,050,395.37 6,050,395.37 525,950.04 0.00 0.00 2.56 525,950.04 246,242,463.18 525,317.25
3561 Overhead Conductors,Devices 271,536,308.82 4,005,706.45 4,005,706.45 337,157.58 0.00 0.00 1.49 337,157.58 271,953,139.11 337,675.15
3591 Roads and Trails 405,090.98 2,692.84 2,692.84 232.93 0.00 0.00 0.69 232.93 405,090.98 232.93
TOTAL TRANSMISSION PLANT 1,378,555,940.69 25,977,973.91 228,442.84 326,200.07 25,423,331.00 2,243,004.51 40,698.93 22,908.46 0.00 2,179,397.12 1,386,888,183.86 2,193,220.88
360 Distr-ROW Renewal Cost 873,576.40 29,090.09 29,090.09 2,424.17 0.00 0.00 3.33 2,424.17 873,576.40 2,424.17
361 Structures and improvements 66,084,348.25 1,326,156.77 1,326,156.77 117,850.42 0.00 0.00 2.14 117,850.42 65,769,271.76 117,288.53
362 Station Equipment 338,795,158.69 6,333,752.59 6,333,752.59 536,425.67 0.00 0.00 1.90 536,425.67 338,554,483.13 536,044.60
TOTAL SUBSTATION EQUIPMENT 405,753,083.34 7,688,999.45 0.00 0.00 7,688,999.45 656,700.26 0.00 0.00 0.00 656,700.26 405,197,331.29 655,757.30
3631 Battery Storage 140,772,713.34 2,244,321.74 2,244,321.74 586,219.09 0.00 0.00 5.00 586,219.09 141,129,691.06 588,040.38
TOTAL BATTERY STORAGE 140,772,713.34 2,244,321.74 0.00 0.00 2,244,321.74 586,219.09 0.00 0.00 0.00 586,219.09 141,129,691.06 588,040.38
364 Poles,Towers and Fixtures 344,304,526.41 6,442,765.12 6,442,765.12 570,649.36 0.00 0.00 1.95 570,649.36 344,445,238.20 559,723.51
365 Overhead Conductors,Devices 165,014,147.73 3,587,925.38 3,587,925.38 306,651.29 0.00 0.00 2.23 306,651.29 165,084,686.23 306,782.38
366 Underground Conduit 57,714,926.36 1,306,133.57 1,306,133.57 113,986.98 0.00 0.00 2.37 113,986.98 56,649,590.49 111,882.94
367 Underground Conductors,Device 351,104,223.52 7,626,874.75 7,626,874.75 664,172.16 0.00 0.00 2.27 664,172.16 349,826,321.69 661,754.79
368 Line Transformers 777,303,575.61 14,291,907.73 14,291,907.73 1,243,685.72 0.00 0.00 1.921 1,243,685.72 780,382,163.88 1,248,611.46
369 Services 72,438,102.73 1,167,405.11 1,167,405.11 100,206.03 0.00 0.00 1.66 100,206.03 72,731,928.71 100,612.50
37000 Meters 19,630,358.60 660,686.09 660,686.09 56,437.28 0.00 0.00 3.45 56,437.28 19,653,077.33 56,502.60
37010 Meters-AMI 99,291,362.59 5,066,436.06 5,066,436.06 434,399.71 0.00 0.00 5.25 434,399.71 99,864,308.97 436,906.35
371 Installations,Cust Premises 5,844,012.79 217,332.81 217,332.81 20,259.24 0.00 0.00 4.16 20,259.24 5,878,271.72 20,378.01
373 Street Lighting,Signal System 7,085,273.43 224,904.66 224,904.66 19,602.59 0.00 0.00 3.32 19,602.59 7,129,856.86 19,725.94
TOTAL DISTRIBUTION LINES 1,899,730,509.77 40,592,371.28 0.00 0.00 40,592,371.28 3,530,050.36 0.00 0.00 0.00 3,530,050.36 1,901,645,444.08 3,522,880.48
390 Structures and Improvements 178,408,553.24 3,293,855.19 3,293,855.19 301,402.60 0.00 0.00 2.08 301,402.60 179,253,121.31 310,705.41
391 Office Furniture,Equipment 42,146,172.99 6,891,212.22 6,891,212.22 588,372.19 0.00 0.00 14.88 66,586.76 588,372.19 40,492,650.35 568,695.62
392 Transportation Equipment 131,015,979.11 72,443.89 72,443.89 6,036.99 0.00 0.00 4.90 6,036.99 132,549,698.63 6,036.99
393 Stores Equipment 7,753,504.48 220,416.72 220,416.72 25,582.30 0.00 0.00 4.00 (262.72) 25,582.30 7,620,557.52 25,139.14
394 Tools,Shop,Garage Equipment 15,757,638.34 795,511.33 795,511.33 68,227.43 0.00 0.00 5.00 2,570.60 68,227.43 15,808,534.88 68,439.50
395 Laboratory Equipment 16,451,896.00 819,640.63 819,640.63 70,995.07 0.00 0.00 5.00 2,445.50 70,995.07 16,457,035.15 71,016.48
396 Power Operated Equipment 31,332,414.44 0.00 0.00 0.00 0.00 0.00 3.21 0.00 31,473,283.03 -
397 Communication Equipment 81,680,577.28 5,401,103.11 5,401,103.11 452,345.04 0.00 0.00 6.531 5,890.11 452,345.04 82,024,277.83 452,238.89
398 Miscellaneous Equipment 10,914,929.39 798,192.98 798,192.98 66,218.52 0.00 0.00 6.671 5,549.70 66,218.52 10,910,725.11 66,195.15
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 1 of 8
\\fillmore\RegAdmin\2024 Idaho General Rate Case\Workpapers\Larkin\LARKIN Workpaper 2-Depreciation and Amortization Expense.xlsx; Expense Depreciation and Amortization Expense

January 2024
Expense
Adj Plant Balance Actuals Adj'd Exp Accrual Monthly Reserve Adjusted Plant Bal Expense
ACCT ACCOUNT DESCRIPTION @ 12/31/2023 12/31/23 Bridger Coal Exp Valmy Exp 12/31/23 Expense Bridger Exp Coal Valmy Exp Rate Adj Expense 1/31/2024 2/28/2024
TOTAL GENERAL EQUIPMENT PLANT 515,461,665.27 18,292,376.07 0.00 0.00 18,292,376.07 1,579,180.14 0.00 0.00 1 82,779.95 1,579,180.14 516,589,883.81 1,568,467.18
Depreciation and Amortization Exp 6,502,685,886.72 194,634,597.66 19,724,177.48 20,865,030.36 154,045,389.82 18,612,370.97 3,137,220.78 1,524,044.52 82,779.95 13,951,105.67 6,508,934,038.78 13,850,603.27
Depreciation Expense on Disallowed Costs 296 299.32 296 299.32 24 691.61 24 691.61 24 691.61
Total Depreciation and Amortization Exp 194 338 298.34 19 724 177.48 20 865 030.36 153 749 090.50 18 587 679.36 3 137 220.78 1 524 044.52 82 779.95 13 926 414.06 6 508 934 038.78 13 825 911.66
*12/31/23 Expense balance includes Bridger,Valmy,and Wildfire Mitigation deferrals
Wildfire deferrals will not be included in the 2024 forecast
Total Depreciation&Amortization 201,252,228.03 19,204,399.54 14,544,800.30 14,446,976.36
Remove 184 Transportation(392&396) (6,945,947.99) Remove 184 Transportation(392&396) (622,757.17) (622,757.17) (625,435.63)
Add back 39230 Airplane 72,443.89 Add back 39230 Airplane 6,036.99 6,036.99 6,036.99
Remove 151(31230) (40,425.59) 1 Remove 151 (31230) (3,368.87) (1,666.06) (1,666.06)
Remove 404 (6,193,955.04). Remove 404 Amort Expense 595 766.23 595 766.23 556 677.90
Total 403 188,144 343 30 Total 403 Depreciation Expense 17,988,544.26 13,330,647.82 13,269,233.76
188 144 343.30 17 988 544.26
Add Plant not included in totals: 6,502,685,886.72 TB: 6,508,934,038.78
30100 5,703.01 403001 Bridger 4,023,885.34 5,703.01
31010 JBRG gas 198,695.90 198,695.90
33000 31,695,741.47 403003 Val my 1,523,903.40 31,696,880.98
34000 2,699,793.95 403200 12,465,447.13 2,699,793.95
35011 4,027,662.95 403400 (24,691.61) 3,853,716.59
35012 474,930.13 17,988,544.26 474,930.13
36000 8,201,980.45 8,202,146.09
38900 21,077,173.52 38900 21,077,173.52
6,571,067,568.10 6,577,143,078.95
Kristen's Sheet 6,571,067,568.10 Kristen's Sheet 6,577,143,078.95
0.00 0.00
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 2 of 8
\\fillmore\RegAdmin\2024 Idaho General Rate Case\Workpapers\Larkin\LARKIN Workpaper 2-Depreciation and Amortization Expense.xlsx; Expense Depreciation and Amortization Expense

IDAHO POWER COMPANY
Depreciation and Amortization Expense
Actuals for December 31,2023 thru January
Estimated February thru December 2024
Plant Bal Expense Plant Bal Expense Plant Bal Expense Plant Bal Expense Plant Bal Expense Plant Bal Expense Plant Bal
ACCT ACCOUNT DESCRIPTION 2/28/24 3/31/2024 3/31/24 4/30/2024 4/30/24 5/31/2024 5/31/24 6/30/2024 6/30/24 7/31/2024 7131124 8/31/2024 8/31/24
302 Franchises and Consents 54,603,068.62 124,221.98 54,945,539.39 125,001.10 54,973,604.61 125,064.95 55,148,019.65 125,461.74 55,474,741.78 126,205.04 55,832,325.32 127,018.54 55,928,500.62
3031 Miscellaneous Intangible Plant 61,727,710.34 435,180.36 62,377,290.34 439,759.90 62,595,772.15 441,300.19 62,716,944.15 442,154.46 63,438,276.56 447,239.85 63,496,891.56 447,653.09 63,655,798.56
Total Amortization Expense 116,330,778.96 559,402.34 117,322,829.73 564,761.00 117,569,376.76 566,365.14 117,864,963.80 567,616.20 118,913,018.34 573,444.89 119,329,216.88 574,671.63 119,584,299.18
310 Land and Land Rights 148,899.77 198.53 148,899.77 198.53 148,899.77 198.53 148,899.77 198.53 148,899.77 198.53 148,899.77 198.53 148,899.77
311 Structures and Improvements 37,303,704.94 52,536.05 37,303,704.94 52,536.05 37,303,704.94 52,536.05 37,303,704.94 52,536.05 37,303,704.94 52,536.05 37,303,704.94 52,536.05 37,303,704.94
312 Boiler Plant Equipment 185,403,956.25 563,816.01 185,403,956.25 563,816.01 185,403,956.25 563,816.01 185,403,956.25 563,816.01 185,403,956.25 563,816.01 185,403,956.25 563,816.01 185,403,956.25
314 Turbogenerator Units 56,378,666.21 208,131.24 56,378,666.21 208,131.24 56,378,666.21 208,131.24 56,378,666.21 208,131.24 56,378,666.21 208,131.24 56,378,666.21 208,131.24 56,378,666.21
315 Accessory electric Equipment 16,473,701.28 21,690.37 16,473,701.28 21,690.37 16,473,701.28 21,690.37 16,473,701.28 21,690.37 16,473,701.28 21,690.37 16,473,701.28 21,690.37 16,473,701.28
316 Misc Power Plant Equipment 8,423,945.60 27,307.62 8,423,945.60 27,307.62 8,423,945.60 27,307.62 8,423,945.60 27,307.62 8,423,945.60 27,307.62 8,423,945.60 27,307.62 8,423,945.60
TOTAL STEAM PRODUCTION PLANT 304,132,874.05 873,679.82 304,132,874.05 873,679.82 304,132,874.05 873,679.82 304,132,874.05 873,679.82 304,132,874.05 873,679.82 304,132,874.05 873,679.82 304,132,874.05
331 Structures and Improvements 270,058,586.02 474,853.01 271,229,630.85 476,912.10 271,679,453.19 477,703.04 272,752,544.90 479,589.89 273,897,297.42 481,602.75 275,972,243.53 483,451.04 276,266,929.58
332 Reservoirs,Dams,Waterways 312,522,767.11 440,136.23 313,047,532.44 440,875.27 313,409,912.81 441,385.63 314,107,414.93 442,367.94 314,632,922.02 443,108.03 315,950,028.16 443,661.62 316,066,551.08
333 Waterwheel,Turbines,Generato 399,914,020.52 946,463.18 402,908,876.74 953,551.01 405,027,750.19 958,565.68 409,076,795.93 968,148.42 412,079,838.16 975,255.62 419,718,851.16 980,506.60 420,378,950.09
334 Accessory Electric Equipment 76,208,284.11 212,113.06 76,462,836.18 212,821.56 76,642,932.85 213,322.83 76,987,087.25 214,280.73 77,242,335.10 214,991.17 77,891,623.88 215,516.06 77,947,729.93
335 Misc Power Plant Equipment 33,162,363.15 81,524.14 33,274,541.67 81,799.91 33,351,837.09 81,989.93 33,500,712.02 82,355.92 33,613,035.85 82,632.05 33,894,182.20 82,838.82 33,919,107.62
336 Roads,Railroads and Bridges 19,457,383.70 57,074.99 19,542,892.97 57,325.82 19,593,384.34 57,473.93 19,695,512.23 57,773.50 19,780,475.89 58,022.73 19,974,485.02 58,222.78 19,994,298.67
TOTAL HYDRO PRODUCTION PLANT 1,111,323,404.61 2,212,164.61 1,116,466,310.85 2,223,285.67 1,119,705,270.46 2,230,441.04 1,126,120,067.27 2,244,516.40 1,131,245,904.44 2,255,612.35 1,143,401,413.96 2,264,196.92 1,144,573,566.97
341 Structures and Improvements 154,979,451.83 334,497.32 155,240,777.11 335,061.34 155,287,341.96 335,161.85 155,327,095.30 335,247.65 156,065,285.16 336,840.91 156,258,459.53 337,257.84 156,325,482.21
342 Fuel Holders,Producers,Acces 10,438,142.08 23,137.88 10,435,623.00 23,132.30 10,435,174.13 23,131.30 10,434,790.92 23,130.45 10,427,675.01 23,114.68 10,425,812.88 23,110.55 10,425,166.80
343 Prime Movers 294,490,929.71 944,825.07 294,373,262.70 944,447.55 294,352,295.93 944,380.28 294,334,396.18 944,322.85 294,002,011.22 943,256.45 293,915,030.54 942,977.39 293,884,852.22
344 Generators 67,666,536.04 134,769.18 67,670,254.37 134,776.59 67,670,916.93 134,777.91 67,671,482.57 134,779.04 67,681,986.09 134,799.96 67,684,734.72 134,805.43 67,685,688.37
345 Accessory Electric Equipment 93,825,667.44 227,527.24 93,861,716.71 227,614.66 93,868,140.23 227,630.24 93,873,624.12 227,643.54 93,975,455.85 227,890.48 94,002,103.84 227,955.10 94,011,349.48
346 Misc Power Plant Equipment 7,775,274.16 20,604.48 7,799,939.86 20,669.84 7,804,334.98 20,681.49 7,808,087.18 20,691.43 7,877,762.69 20,876.07 7,895,995.84 20,924.39 7,902,321.91
TOTAL OTHER PRODUCTION PLANT 629,176,001.26 1,685,361.17 629,381,573.75 1,685,702.28 629,418,204.16 1,685,763.07 629,449,476.27 1,685,814.96 630,030,176.02 1,686,778.55 630,182,137.35 1,687,030.70 630,234,860.99
350.2 Land Rights&Easements 37,425,933.95 34,307.11 37,555,498.31 34,425.87 37,622,176.22 34,486.99 37,649,520.41 34,512.06 37,801,246.15 34,651.14 37,821,350.81 34,669.57 37,860,172.56
350.22 Transm-ROW Renewal Cost 1,322,938.75 3,671.16 1,328,382.60 3,686.26 1,331,184.18 3,694.04 1,332,333.09 3,697.22 1,338,708.09 3,714.91 1,339,552.82 3,717.26 1,341,183.98
352 Structures and Improvements 106,772,125.44 169,055.87 106,956,795.82 169,348.26 107,233,952.06 169,787.09 107,320,691.61 169,924.43 107,514,994.72 170,232.07 107,517,630.86 170,236.25 107,599,272.40
353 Station Equipment 492,648,740.92 894,978.55 493,847,208.78 897,155.76 495,325,420.92 899,841.18 495,807,167.84 900,716.35 497,126,781.23 903,113.65 497,187,256.83 903,223.52 497,663,455.18
354 Towers and Fixtures 233,377,526.05 233,377.53 234,951,311.51 234,951.31 235,761,231.12 235,761.23 236,093,374.15 236,093.37 237,936,348.18 237,936.35 238,180,554.38 238,180.55 238,652,112.35
355 Poles and Fixtures 246,811,440.87 526,531.07 248,687,244.24 530,532.79 249,652,591.79 532,592.20 250,048,474.86 533,436.75 252,245,125.55 538,122.93 252,536,196.22 538,743.89 253,098,248.72
3561 Overhead Conductors,Devices 272,425,167.20 338,261.25 273,981,347.52 340,193.51 274,782,206.98 341,187.91 275,110,634.50 341,595.70 276,932,992.13 343,858.47 277,174,466.51 344,158.30 277,640,749.41
3591 Roads and Trails 405,090.98 232.93 405,090.98 232.93 405,090.98 232.93 405,090.98 232.93 405,090.98 232.93 405,090.98 232.93 405,090.98
TOTAL TRANSMISSION PLANT 1,391,188,964.15 2,200,415.47 1,397,712,879.76 2,210,526.69 1,402,113,854.25 2,217,583.57 1,403,767,287.43 2,220,208.81 1,411,301,287.03 2,231,862.45 1,412,162,099.41 2,233,162.27 1,414,260,285.58
360 Distr-ROW Renewal Cost 873,576.40 2,424.17 873,576.40 2,424.17 873,576.40 2,424.17 873,576.40 2,424.17 873,576.40 2,424.17 873,576.40 2,424.17 873,576.40
361 Structures and improvements 66,218,897.12 118,090.37 66,961,523.50 119,414.72 67,521,089.91 120,412.61 68,178,798.40 121,585.52 70,324,602.80 125,412.21 70,907,695.01 126,452.06 71,094,992.36
362 Station Equipment 340,329,755.68 538,855.45 343,262,038.23 543,498.23 345,471,387.76 546,996.36 348,068,276.54 551,108.10 356,540,604.90 564,522.62 358,842,952.41 568,168.01 359,582,460.20
TOTAL SUBSTATION EQUIPMENT 407,422,229.20 659,369.99 411,097,138.13 665,337.12 413,866,054.07 669,833.14 417,120,651.34 675,117.79 427,738,784.11 692,359.00 430,624,223.82 697,044.24 431,551,028.96
3631 Battery Storage 141,129,691.06 588,040.38 168,088,389.54 700,368.29 168,088,389.54 700,368.29 168,088,389.54 700,368.29 367,353,311.98 1,530,638.80 367,353,311.98 1,530,638.80 367,353,311.98
TOTAL BATTERY STORAGE 141,129,691.06 588,040.38 168,088,389.54 700,368.29 168,088,389.54 700,368.29 168,088,389.54 700,368.29 367,353,311.98 1,530,638.80 367,353,311.98 1,530,638.80 367,353,311.98
364 Poles,Towers and Fixtures 345,828,242.50 561,970.89 348,609,536.80 566,490.50 350,075,128.67 568,872.08 351,904,362.17 571,844.59 355,911,573.23 578,356.31 356,915,619.81 579,987.88 358,950,533.24
365 Overhead Conductors,Devices 165,600,315.96 307,740.59 166,637,848.56 309,668.67 167,167,905.98 310,653.69 167,869,103.16 311,956.75 169,382,195.85 314,768.58 169,741,404.12 315,436.11 170,493,843.96
366 Underground Conduit 56,809,038.60 112,197.85 57,075,545.67 112,724.20 57,272,721.55 113,113.63 57,528,699.50 113,619.18 57,968,712.14 114,488.21 58,156,260.04 114,858.61 58,471,213.30
367 Underground Conductors,Device 351,005,424.43 663,985.26 352,976,217.40 667,713.34 354,434,313.20 670,471.58 356,327,244.33 674,052.37 359,581,093.59 680,207.57 360,967,991.38 682,831.12 363,297,034.62
368 Line Transformers 782,546,239.67 1,252,073.98 786,904,444.39 1,259,047.11 788,784,365.62 1,262,054.98 792,135,120.12 1,267,416.19 798,872,966.81 1,278,196.75 800,120,187.78 1,280,192.30 803,218,331.87
369 Services 72,794,255.50 100,698.72 72,920,550.00 100,873.43 72,984,099.13 100,961.34 73,067,278.35 101,076.40 73,248,936.68 101,327.70 73,296,207.36 101,393.09 73,391,777.66
37000 Meters 19,681,955.01 56,585.62 19,732,413.17 56,730.69 19,755,739.85 56,797.75 19,797,603.41 56,918.11 19,869,494.63 57,124.80 19,887,690.50 57,177.11 19,924,634.81
37010 Meters-AMI 100,362,296.35 439,085.05 100,917,650.15 441,514.72 101,391,921.58 443,589.66 101,875,442.46 445,705.06 102,282,981.84 447,488.05 102,785,123.34 449,684.91 103,316,954.38
371 Installations,Cust Premises 5,878,361.45 20,378.32 5,878,442.56 20,378.60 5,878,494.33 20,378.78 5,878,561.63 20,379.01 5,878,604.19 20,379.16 5,878,649.06 20,379.32 5,878,689.90
373 Street Lighting,Signal System 7,130,155.52 19,726.76 7,131,418.85 19,730.26 7,131,476.98 19,730.42 7,131,669.91 19,730.95 7,133,650.20 19,736.43 7,133,650.20 19,736.43 7,134,795.99
TOTAL DISTRIBUTION LINES 1,907,636,285.00 3,534,443.04 1,918,784,067.55 3,554,871.52 1,924,876,166.89 3,566,623.91 1,933,515,085.04 3,582,698.61 1,950,130,209.17 3,612,073.56 1,954,882,783.59 3,621,676.88 1,964,077,809.73
390 Structures and Improvements 180,048,405.76 312,083.90 181,410,070.87 314,444.12 182,113,941.91 315,664.17 182,315,552.73 316,013.62 183,161,574.15 317,480.06 183,559,051.14 318,169.02 183,691,261.51
391 Office Furniture,Equipment 40,606,196.96 570,103.60 41,199,539.65 577,461.05 41,633,351.09 582,840.31 41,715,934.33 583,864.35 42,120,678.33 588,883.17 42,631,175.34 595,213.33 42,935,321.96
392 Transportation Equipment 133,653,663.49 6,036.99 135,391,335.58 6,036.99 136,583,113.35 6,036.99 136,905,402.55 6,036.99 137,819,749.90 6,036.99 138,793,439.19 6,036.99 139,869,767.27
393 Stores Equipment 7,732,876.52 25,513.54 8,185,973.52 27,023.86 8,325,570.52 27,489.18 8,334,318.52 27,518.34 8,339,775.52 27,536.53 8,339,775.52 27,536.53 8,372,506.52
394 Tools,Shop,Garage Equipment 15,873,748.88 68,711.22 15,930,886.33 68,949.29 15,984,782.33 69,173.86 15,994,838.63 69,215.76 16,057,434.82 69,476.58 16,092,620.31 69,623.18 16,164,173.31
395 Laboratory Equipment 16,546,305.15 71,388.44 16,632,752.15 71,748.63 16,716,264.15 72,096.60 16,734,422.79 72,172.26 16,779,557.79 72,360.32 16,748,679.70 72,231.67 16,742,395.87
396 Power Operated Equipment 31,476,077.47 - 31,476,664.26 - 31,484,725.05 - 31,486,771.80 - 31,491,154.63 - 31,491,211.47 - 31,492,348.88
397 Communication Equipment 81,949,237.50 451,830.54 82,290,179.53 453,685.84 82,353,076.06 454,028.10 83,334,056.37 459,366.27 83,864,313.24 462,251.75 84,083,013.85 463,441.84 84,199,862.57
398 Miscellaneous Equipment 10,993,381.11 66,654.58 11,070,296.78 67,082.10 11,084,198.78 67,159.37 11,125,809.78 67,390.66 11,417,385.60 69,011.33 11,404,262.61 68,938.39 11,469,447.61
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 3 of 8
\\fillmore\RegAdmin\2024 Idaho General Rate Case\Workpapers\Larkin\LARKIN Workpaper 2-Depreciation and Amortization Expense.xlsx; Expense Depreciation and Amortization Expense

Plant Bal Expense Plant Bal Expense Plant Bal Expense Plant Bal Expense Plant Bal Expense Plant Bal Expense Plant Bal
ACCT ACCOUNT DESCRIPTION 2/28/24 3/31/2024 3/31/24 4/30/2024 4/30/24 5/31/2024 5/31/24 6/30/2024 6/30/24 7/31/2024 7131124 8/31/2024 8/31/24
TOTAL GENERAL EQUIPMENT PLANT 518,879,892.84 1,572,322.81 523,587,698.68 1,586,431.88 526,279,023.24 1,594,488.58 527,947,107.50 1,601,578.25 531,051,623.98 1,613,036.73 533,143,229.13 1,621,190.95 534,937,085.50
Depreciation and Amortization Exp 6,527,220,121.13 13,885,199.63 6,586,573,762.04 14,064,964.27 6,606,049,213.43 14,105,146.56 6,628,005,902.24 14,151,599.13 6,871,897,189.12 15,069,486.15 6,895,211,290.15 15,103,292.21 6,910,705,122.93
Depreciation Expense on Disallowed Costs 24 691.61 24 691.61 24 691.61 24 691.61 24,691.61 24 691.61
Total Depreciation and Amortization Exp 6 527 220 121.13 13 860 508.02 6 586 573 762.04 14 040 272.66 6 606 049 213.43 14 080 454.95 6 628 005 902.24 14 126 907.52 6 871 897 189.12 15 044 794.54 6 895 211 290.15 15 078 600.60 6 910 705 122.93
*12/31/23 Expense balance includes Bridger,Valmy,and Wili
Wildfire deferrals will not be included in the 2024 forecast
Total Depreciation&Amortization 14,486,088.06 14,672,949.76 14,718,020.04 14,765,794.09 15,687,426.43 15,725,208.54
Remove 184 Transportation(392&396) (629,950.97) (637,048.03) (641,936.02) (643,257.50) (647,002.82) (650,978.87)
Add back 39230 Airplane 6,036.99 6,036.99 6,036.99 6,036.99 6,036.99 6,036.99
Remove 151(31230) (1,666.06) (1,666.06) (1,666.06) (1,666.06) (1,666.06) (1,666.06)
Remove 404 559 402.34 564 761.00 566 365.14 567 616.20 573 444.89 574 671.63
Total 403 13,301,105.68 13,475,511.66 13,514,089.81 13,559,291.32 14,471,349.65 14,503,928.97
Add Plant not included in totals: 6,527,220,121.13 6,586,573,762.04 6,606,049,213.43 6,628,005,902.24 6,871,897,189.12 6,895,211,290.15 6,910,705,122.93
30100 5,703.01 5,703.01 5,703.01 5,703.01 5,703.01 5,703.01 5,703.01
31010 JBRG gas 198,695.90 198,695.90 198,695.90 198,695.90 198,695.90 198,695.90 198,695.90
33000 31,696,880.98 31,696,880.98 31,696,880.98 31,696,880.98 31,696,880.98 31,696,880.98 31,696,880.98
34000 2,699,793.95 2,699,793.95 2,699,793.95 2,699,793.95 2,699,793.95 2,699,793.95 2,699,793.95
35011 3,853,716.59 3,853,716.59 3,853,716.59 3,853,716.59 3,853,716.59 3,853,716.59 3,853,716.59
35012 474,930.13 474,930.13 474,930.13 474,930.13 474,930.13 474,930.13 474,930.13
36000 8,820,623.09 9,018,823.09 9,018,823.09 9,018,823.09 9,018,823.09 9,018,823.09 9,018,823.09
38900 21,077,173.52 21,077,173.52 21,077,173.52 21,077,173.52 21,077,173.52 21,077,173.52 21,077,173.52
6,596,047,638.30 6,655,599,479.21 6,675,074,930.60 6,697,031,619.41 6,940,922,906.29 6,964,237,007.32 6,979,730,840.10
Kristen's Sheet 6,596,047,638.30 6,655,599,479.21 6,675,074,930.60 6,697,031,619.41 6,940,922,906.29 6,956,085,365.50 6 971 579 198.28
0.00 0.00 0.00 0.00 0.00 8,151,641.83 8,151,641.83
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 4 of 8
\\fillmore\RegAdmin\2024 Idaho General Rate Case\Workpapers\Larkin\LARKIN Workpaper 2-Depreciation and Amortization Expense.xlsx; Expense Depreciation and Amortization Expense

IDAHO POWER COMPANY
Depreciation and Amortization Expense
Actuals for December 31,2023 thru January
Estimated February thru December 2024
Test Year Annual Depr
Expense Plant Bal Expense Plant Bal Expense Plant Bal Expense Expense Plant Bal Exp for 12/31/2024
ACCT ACCOUNT DESCRIPTION 9/30/2024 9/30/24 10/31/2024 10/31/24 11/30/2024 11/30/24 12/31/2024 12 Month Total 12/31/24 Ending Plant
302 Franchises and Consents 127,237.34 64,036,988.70 145,684.15 64,907,426.04 147,664.39 65,603,102.47 149,247.06 1,569,187.59 67,759,450.41 1,849,833.00
3031 Miscellaneous Intangible Plant 448,773.38 63,991,461.56 451,139.80 74,912,773.60 528,135.05 74,233,572.52 523,346.69 5,510,745.60 75,434,751.62 6,381,779.99
Total Amortization Expense 576,010.72 128,028,450.26 996,823.95 139,820,199.64 675,799.44 139,836,674.99 672,593.75 7,079,933.19 143,194,202.03 8,231,612.99
310 Land and Land Rights 198.53 148,899.77 198.53 148,899.77 198.53 148,899.77 198.53 2,382.36 148,899.77 2,382.40
311 Structures and Improvements 52,536.05 37,303,704.94 52,536.05 37,303,704.94 52,536.05 37,303,704.94 52,536.05 630,432.60 37,303,704.94 630,432.61
312 Boiler Plant Equipment 563,816.01 185,403,956.25 563,816.01 185,403,956.25 563,816.01 185,403,956.25 563,816.01 6,765,792.12 185,403,956.25 6,784,118.74
314 Turbogenerator Units 208,131.24 56,378,666.21 208,131.24 56,378,666.21 208,131.24 56,378,666.21 208,131.24 2,497,574.88 56,378,666.21 2,497,574.91
315 Accessory electric Equipment 21,690.37 16,473,701.28 21,690.37 16,473,701.28 21,690.37 16,473,701.28 21,690.37 260,284.44 16,473,701.28 260,284.48
3161 Misc Power Plant Equipment 27,307.62 8,423,945.60 27,307.62 8,423,945.60 27,307.62 8,423,945.60 27,307.62 327,691.44 8,423,945.60 327,691.48
TOTAL STEAM PRODUCTION PLANT 873,679.82 304,132,874.05 873,679.82 304,132,874.05 873,679.82 304,132,874.05 873,679.82 10,484,157.84 304,132,874.05 10,502,484.62
331 Structures and Improvements 483,969.20 290,809,576.27 509,540.02 292,409,699.46 512,353.57 293,894,302.84 514,964.00 5,819,336.89 297,845,397.13 6,284,537.88
332 Reservoirs,Dams,Waterways 443,825.73 316,592,207.80 444,566.03 316,683,823.63 444,695.05 316,942,740.57 445,059.69 5,313,594.07 317,158,044.63 5,359,970.95
333 Waterwheel,Turbines,Generato 982,068.84 421,487,944.12 984,693.46 421,813,399.77 985,463.70 423,162,792.26 988,657.26 11,655,506.79 423,900,667.59 12,038,778.96
334 Accessory Electric Equipment 215,672.22 78,041,990.46 215,934.58 78,069,653.03 216,011.57 78,184,346.56 216,330.80 2,573,090.07 78,247,063.33 2,613,451.92
335 Misc Power Plant Equipment 82,900.09 34,037,819.68 83,191.93 34,058,066.45 83,241.70 34,113,845.08 83,378.82 988,652.73 34,161,516.98 1,007,764.75
336 Roads,Railroads and Bridges 58,280.90 20,398,783.30 59,467.39 20,446,995.11 59,608.81 20,510,810.16 59,796.01 699,958.85 20,628,658.86 726,128.79
TOTAL HYDRO PRODUCTION PLANT 2,266,716.98 1,161,368,321.62 2,297,393.41 1,163,481,637.45 2,301,374.40 1,166,808,837.47 2,308,186.58 27,050,139.40 1,171,941,348.52 28,030,633.25
341 Structures and Improvements 337,402.50 156,358,614.82 337,474.01 156,388,103.45 337,537.66 156,464,461.44 337,702.46 4,032,996.80 157,205,257.97 4,071,616.18
342 Fuel Holders,Producers,Acces 23,109.12 10,424,847.42 23,108.41 10,424,563.15 23,107.78 10,423,827.09 23,106.15 277,449.67 10,416,686.06 277,083.85
343 Prime Movers 942,880.57 293,869,933.59 942,832.70 293,856,655.73 942,790.10 293,822,274.00 942,679.80 11,339,423.79 293,488,715.33 11,299,315.54
344 Generators 134,807.33 67,686,159.81 134,808.27 67,686,579.39 134,809.10 67,687,665.87 134,811.27 1,628,726.97 67,698,206.49 1,617,987.14
345 Accessory Electric Equipment 227,977.52 94,015,920.05 227,988.61 94,019,987.95 227,998.47 94,030,521.37 228,024.01 2,733,118.31 94,132,712.68 2,739,261.94
346 Misc Power Plant Equipment 20,941.15 7,905,449.19 20,949.44 7,908,232.54 20,956.82 7,915,439.74 20,975.92 249,255.30 7,985,361.28 253,934.49
TOTAL OTHER PRODUCTION PLANT 1,687,118.19 630,260,924.87 1,687,161.44 630,284,122.22 1,687,199.93 630,344,189.51 1,687,299.61 20,260,970.84 630,926,939.81 20,259,199.14
350.2 Land Rights&Easements 34,705.16 37,890,101.24 34,732.59 38,308,657.02 35,116.27 38,418,822.17 35,217.25 415,323.68 39,138,710.42 430,525.81
350.22 Transm-ROW Renewal Cost 3,721.79 1,342,441.48 3,725.28 1,360,027.78 3,774.08 1,364,656.54 3,786.92 44,521.74 1,394,903.80 46,450.30
352 Structures and Improvements 170,365.51 107,836,686.17 170,741.42 108,023,617.97 171,037.40 108,475,832.15 171,753.40 2,038,302.70 109,288,682.47 2,076,484.97
353 Station Equipment 904,088.61 498,970,009.93 906,462.18 499,955,825.52 908,253.08 502,834,252.23 913,482.22 10,800,211.73 507,541,457.65 11,064,403.78
354 Towers and Fixtures 238,652.11 239,015,648.33 239,015.65 244,099,739.22 244,099.74 245,437,887.39 245,437.89 2,849,007.73 254,182,187.22 3,050,186.25
355 Poles and Fixtures 539,942.93 253,531,549.21 540,867.30 259,591,304.56 553,794.78 261,186,250.57 557,197.33 6,443,029.26 271,608,628.69 6,953,180.89
3561 Overhead Conductors,Devices 344,737.26 278,000,218.70 345,183.60 283,027,436.47 351,425.73 284,350,615.46 353,068.68 4,118,503.14 292,997,097.29 4,365,656.75
3591 Roads and Trails 232.93 405,090.98 232.93 405,090.98 232.93 405,090.98 232.93 2,795.16 405,090.98 2,795.13
TOTAL TRANSMISSION PLANT 2,236,446.33 1,416,991,746.04 2,240,960.95 1,434,771,699.52 2,267,734.01 1,442,473,407.48 2,280,176.62 26,711,695.14 1,476,556,758.53 27,989,683.88
360 Distr-ROW Renewal Cost 2,424.17 873,576.40 2,424.17 873,576.40 2,424.17 873,576.40 2,424.17 29,090.04 873,576.40 29,090.09
361 Structures and improvements 126,786.07 71,591,600.17 127,671.69 72,159,788.75 128,684.96 72,733,319.74 129,707.75 1,479,356.91 73,907,861.51 1,581,628.24
362 Station Equipment 569,338.90 361,543,235.66 572,443.46 363,786,619.72 575,995.48 366,051,097.27 579,580.90 6,682,977.78 370,688,639.07 7,043,084.14
TOTAL SUBSTATION EQUIPMENT 698,549.14 434,008,412.22 702,539.32 436,819,984.87 707,104.61 439,657,993.41 711,712.82 8,191,424.73 445,470,076.98 8,653,802.47
3631 Battery Storage 1,530,638.80 367,353,311.98 1,530,638.80 367,353,311.98 1,530,638.80 367,353,311.98 1,530,638.80 13,047,237.52 367,353,311.98 18,367,665.60
TOTAL BATTERY STORAGE 1,530,638.80 367,353,311.98 1,530,638.80 367,353,311.98 1,530,638.80 367,353,311.98 1,530,638.80 13,047,237.52 367,353,311.98 18,367,665.60
364 Poles,Towers and Fixtures 583,294.62 361,646,203.17 587,675.08 362,702,020.23 589,390.78 364,049,109.78 591,579.80 6,909,835.40 367,617,271.69 7,168,536.80
365 Overhead Conductors,Devices 316,834.39 171,512,941.98 318,728.22 171,890,659.38 319,430.14 172,403,009.12 320,382.26 3,759,033.07 173,759,820.73 3,874,844.00
366 Underground Conduit 115,480.65 59,043,195.79 116,610.31 59,477,773.93 117,468.60 60,895,446.33 120,268.51 1,376,699.67 61,422,626.86 1,455,716.26
367 Underground Conductors,Device 687,236.89 367,526,786.14 695,238.17 370,740,447.76 701,317.35 381,223,992.49 721,148.72 8,170,129.32 385,122,437.95 8,742,279.34
368 Line Transformers 1,285,149.33 808,139,742.05 1,293,023.59 809,698,435.25 1,295,517.50 813,407,048.16 1,301,451.28 15,266,420.19 819,847,335.92 15,741,068.85
369 Services 101,525.29 73,540,828.46 101,731.48 73,607,429.68 101,823.61 73,762,010.90 102,037.45 1,214,267.04 73,940,381.53 1,227,410.33
37000 Meters 57,283.33 19,980,635.61 57,444.33 20,001,110.70 57,503.19 20,042,673.34 57,622.69 684,127.50 20,114,093.15 693,936.21
37010 Meters-AMI 452,011.68 103,815,467.88 454,192.67 104,318,810.56 456,394.80 104,787,694.54 458,446.16 5,359,418.82 105,259,706.82 5,526,134.61
371 Installations,Cust Premises 20,379.46 5,878,721.54 20,379.57 5,878,769.86 20,379.74 5,878,837.16 20,379.97 244,429.18 5,878,905.03 244,562.45
373 Street Lighting,Signal System 19,739.60 7,135,198.71 19,740.72 7,135,579.52 19,741.77 7,136,157.05 19,743.37 236,685.24 7,136,611.15 236,935.49
TOTAL DISTRIBUTION LINES 3,638,935.24 1,978,219,721.32 3,664,764.14 1,985,451,036.87 3,678,967.48 2,003,585,978.86 3,713,060.21 43,221,045.43 2,020,099,190.82 44,911,424.34
390 Structures and Improvements 318,398.19 184,185,239.39 319,254.41 184,649,332.81 320,058.84 184,933,049.93 320,550.62 3,784,224.96 187,603,356.39 3,902,149.81
391 Office Furniture,Equipment 598,984.75 43,879,083.44 610,687.39 44,385,920.11 616,972.17 45,284,621.74 628,116.07 7,110,194.00 45,895,872.77 7,628,346.99
392 Transportation Equipment 6,036.99 140,883,695.29 6,036.99 142,001,222.20 6,036.99 142,875,688.03 6,036.99 72,443.88 146,232,891.07 6,036.99
393 Stores Equipment 27,645.64 8,464,423.52 27,952.03 8,481,521.75 28,009.02 8,509,748.75 28,103.11 325,049.22 8,997,577.75 356,750.47
394 Tools,Shop,Garage Equipment 69,921.32 16,194,053.69 70,045.82 16,176,750.98 69,973.73 16,202,373.54 70,080.49 831,838.18 16,583,328.91 860,013.65
395 Laboratory Equipment 72,205.48 16,870,221.87 72,738.09 16,856,435.12 72,680.65 16,712,147.94 72,079.45 863,713.14 16,747,259.21 866,708.96
396 Power Operated Equipment - 31,495,237.80 - 31,498,332.65 - 31,499,850.92 - 0.00 31,516,343.02
397 Communication Equipment 464,077.70 84,825,584.09 467,482.66 86,099,668.59 474,415.81 86,345,971.31 475,756.10 5,530,920.54 89,930,528.21 5,943,144.81
398 Miscellaneous Equipment 69,300.71 11,507,740.97 69,513.56 11,628,453.97 70,184.52 11,654,799.97 70,330.96 817,979.85 11,482,711.48 832,493.26
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 5 of 8
\\fillmore\RegAdmin\2024 Idaho General Rate Case\Workpapers\Larkin\LARKIN Workpaper 2-Depreciation and Amortization Expense.xlsx; Expense Depreciation and Amortization Expense

Test Year Annual Depr
Expense Plant Bal Expense Plant Bal Expense Plant Bal Expense Expense Plant Bal Exp for 12/31/2024
ACCT ACCOUNT DESCRIPTION 9/30/2024 9/30/24 10/31/2024 10/31/24 11/30/2024 11/30/24 12/31/2024 12 Month Total 12/31/24 Ending Plant
TOTAL GENERAL EQUIPMENT PLANT 1,626,570.78 538,305,280.06 1,643,710.95 541,777,638.19 1,658,331.73 544,018,252.14 1,671,053.79 19,336,363.77 554,989,868.81 20,395,644.94
Depreciation and Amortization Exp 15,134,665.97 6,958,669,042.43 15,237,672.78 7,003,892,504.78 15,380,830.22 7,038,211,519.87 15,448,402.00 175,382,967.86 7,114,664,571.53 187,342,151.23
Depreciation Expense on Disallowed Costs 24 691.61 24 691.61 24 691.61 24 691.61 296,299.32 296,299.32
Total Depreciation and Amortization Exp 15 109 974.36 6 958 669 042.43 15 212 981.17 7,003 892 504.78 15 356 138.61 7 038 211 519.87 15 423 710.39 175 086 668.54 7 114 664 571.53 187 045 851.91
*12/31/23 Expense balance includes Bridger,Valmy,and Wili
Wildfire deferrals will not be included in the 2024 forecast
Total Depreciation&Amortization 15,760,980.34 15,868,135.09 16,015,864.04 16,087,010.62 195,218,567.25
Remove 184 Transportation(392&396) (655,376.91) (659,524.85) (664,096.36) (667,671.16) (8,177,086.27)
Add back 39230 Airplane 6,036.99 6,036.99 6,036.99 6,036.99 6,036.99
Remove 151(31230) (1,666.06) (1,666.06) (1,666.06) (1,666.06) (1,666.06)
Remove 404 576 010.72 596 823.95 675 799.44 672 593.75 8 231 612.99
Total 403 14,533,963.64 14,616,157.22 14,680,339.17 14,751,116.64 178,814,238.92
Add Plant not included in totals: 6,958,669,042.43 7,003,892,504.78 7,038,211,519.87 7,114,664,571.53
30100 5,703.01 5,703.01 5,703.01 5,703.01
31010 JBRG gas 198,695.90 198,695.90 198,695.90 198,695.90
33000 31,696,880.98 31,696,880.98 31,696,880.98 31,696,880.98
34000 2,699,793.95 2,699,793.95 2,699,793.95 2,699,793.95
35011 3,853,716.59 3,853,716.59 3,853,716.59 3,853,716.59
35012 474,930.13 474,930.13 474,930.13 474,930.13
36000 9,018,823.09 9,518,823.09 9,518,823.09 9,518,823.09
38900 21,077,173.52 21,077,173.52 21,077,173.52 21,077,173.52
7,027,694,759.60 7,073,418,221.95 7,107,737,237.04 7,184,190,288.70
Kristen's Sheet 7,019,543,117.78 7,065,266,580.13 7,099,585,595.21 7,184,190,288.70
8,151,641.83 8,151,641.83 8,151,641.83 0.00
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 6 of 8
\\fillmore\RegAdmin\2024 Idaho General Rate Case\Workpapers\Larkin\LARKIN Workpaper 2-Depreciation and Amortization Expense.xlsx; Expense Depreciation and Amortization Expense

IDAHO POWER COMPANY
INCREMENTAL DEPRECIATION AND AMORTIZATION EXPENSE
December 31, 2024
Account Account Description 2023 GRC Settled 2024 Expense Incremental 2024 TY
302 Franchises and Consents 1,543,543 1,849,833 306,290
303 Miscellaneous Intangible Plant 4,422,755 6,381,780 1,959,025
Total Amortization Expense 5,966,298 8,231,613 2,265,315
310 Land and Land Rights
311 Structures and Improvements
312 Boiler Plant Equipment
314 Turbogenerator Units
315 Accessory electric Equipment
316 Misc Power Plant Equipment
TOTAL STEAM PRODUCTION PLANT 9,604,775 10,502,485 897,709
331 Structures and Improvements
332 Reservoirs, Dams, Waterways
333 Waterwheel, Turbines, Generator
334 Accessory Electric Equipment
335 Misc Power Plant Equipment
336 Roads, Railroads and Bridges
TOTAL HYDRO PRODUCTION PLANT 25,359,140 28,030,633 2,671,493
341 Structures and Improvements
342 Fuel Holders, Producers, Access
343 Prime Movers
344 Generators
345 Accessory Electric Equipment
346 Misc Power Plant Equipment
TOTAL OTHER PRODUCTION PLANT 19,988,116 20,259,199 271,083
350 Land Rights & Easements 416,355 476,976 60,621
352 Structures and Improvements 1,920,891 2,076,485 155,594
353 Station Equipment 10,291,818 11,064,404 772,586
354 Towers and Fixtures 2,890,165 3,050,186 160,021
355 Poles and Fixtures 6,155,439 6,953,181 797,742
356 Overhead Conductors, Devices 4,098,377 4,365,657 267,279
359 Roads and Trails 2,693 2,795 102
TOTAL TRANSMISSION PLANT 25,775,739 27,989,684 2,213,945
360 Distr- ROW Renewal Cost 30,928 29,090 (1,838)
361 Structures and improvements 1,393,285 1,581,628 188,344
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 7 of 8
Depreciation and Amortization Expense

362 Station Equipment 6,761,927 7,043,084 281,157
TOTAL SUBSTATION EQUIPMENT 8,186,140 8,653,802 467,662
363 Battery Storage 8,740,027 18,367,666 9,627,639
TOTAL BATTERY STORAGE
364 Poles, Towers and Fixtures 6,652,506 7,168,537 516,031
365 Overhead Conductors, Devices 3,687,824 3,874,844 187,020
366 Underground Conduit 1,327,818 1,455,716 127,898
367 Underground Conductors, Device 7,931,228 8,742,279 811,051
368 Line Transformers 14,560,366 15,741,069 1,180,703
369 Services 1,163,810 1,227,410 63,601
370 Meters 5,908,929 6,220,071 311,142
371 Installations, Cust Premises 193,380 244,562 51,182
373 Street Lighting, Signal System 217,455 236,935 19,480
TOTAL DISTRIBUTION LINES 41,643,317 44,911,424 3,268,108
390 Structures and Improvements 3,366,802 3,902,150 535,348
391 Office Furniture, Equipment 6,992,274 7,628,347 636,073
392 Transportation Equipment 72,444 6,037 (66,407)
393 Stores Equipment 227,417 356,750 129,334
394 Tools, Shop, Garage Equipment 808,645 860,014 51,369
395 Laboratory Equipment 781,567 866,709 85,142
396 Power Operated Equipment - - -
397 Communication Equipment 5,615,068 5,943,145 328,077
398 Miscellaneous Equipment 860,793 832,493 (28,300)
TOTAL GENERAL EQUIPMENT PLANT 18,725,011 20,395,645 1,670,634
Depreciation and Amortization Exp 163,988,563 187,342,151 23,353,588
Depreciation Expense on Disallowed Costs (296,299) (296,299) -
Total 163,692,264 187,045,852 23,353,588
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 8 of 8
Depreciation and Amortization Expense

IDAHO POWER COMPANY
INCREMENTAL ELECTRIC PLANT IN SERVICE
December 31, 2024
Account Account Description 2023 GRC Settled 2024 Plant Incremental EPIS
301 Organization 5,703.01 5,703.01 0.00
302 Franchises and Consents 52,690,323.89 67,759,450.41 15,069,126.52
303 Miscellaneous Intangible Plant 52,524,883.01 75,434,751.62 22,909,868.62
TOTAL INTANGIBLE PLANT 105,220,909.91 143,199,905.04 37,978,995.13
310 Land and Land Rights
311 Structures and Improvements
312 Boiler Plant Equipment
314 Turbogenerator Units
315 Accessory electric Equipment
316 Misc Power Plant Equipment
TOTAL STEAM PRODUCTION PLANT 274,155,558 304,331,569.95 30,176,012.00
330 Land and Land Rights
331 Structures and Improvements
332 Reservoirs, Dams, Waterways
333 Waterwheel, Turbines, Generator
334 Accessory Electric Equipment
335 Misc Power Plant Equipment
336 Roads, Railroads and Bridges
TOTAL HYDRO PRODUCTION PLANT 1,092,528,822 1,203,638,229.50 111,109,407.39
340 LAND AND LAND RIGHTS
341 Structures and Improvements
342 Fuel Holders, Producers,Access
343 Prime Movers
344 Generators
345 Accessory Electric Equipment
346 Misc Power Plant Equipment
TOTAL OTHER PRODUCTION PLANT 625,844,417 633,626,733.76 7,782,316.76
350 Land 41,039,057 44,862,260.94 3,823,203.69
352 Structures and Improvements 100,562,285 109,288,682.47 8,726,397.74
353 Station Equipment 468,500,193 507,541,457.65 39,041,265.10
354 Towers and Fixtures 237,158,275 254,182,187.22 17,023,911.98
355 Poles and Fixtures 236,066,559 271,608,628.69 35,542,070.09
356 Overhead Conductors, Devices 271,757,281 292,997,097.29 21,239,816.10
359 Roads and Trails 390,266 405,090.98 14,824.80
TOTAL TRANSMISSION PLANT 1,355,473,916 1,480,885,405.25 125,411,489.51
360 Land and Land Rights 9,601,720 10,392,399.49 790,679.41
361 Structures and improvements 62,384,614 73,907,861.51 11,523,247.16
362 Station Equipment 343,076,495 370,688,639.07 27,612,143.60
TOTAL SUBSTATION EQUIPMENT 415,062,830 454,988,900.07 39,926,070.17
363 Storage Battery Equipment 112,074,984 367,353,311.98 255,278,328.33
TOTAL STORAGE BATTERY EQUIPMENT
364 Poles, Towers and Fixtures 334,235,525 367,617,271.69 33,381,746.58
365 Overhead Conductors, Devices 162,758,591 173,759,820.73 11,001,229.42
366 Underground Conduit 54,848,113 61,422,626.86 6,574,514.14
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 1 of 14
Incremental Plant Determination

367 Underground Conductors, Device 338,877,918 385,122,437.95 46,244,519.88
368 Line Transformers 745,644,817 819,847,335.92 74,202,519.29
369 Services 69,707,265 73,940,381.53 4,233,116.89
370 Meters 116,503,219 125,373,799.97 8,870,580.99
371 Installations, Cust Premises 4,646,860 5,878,905.03 1,232,045.35
373 Street Lighting, Signal System 6,313,711 7,136,611.15 822,900.13
TOTAL DISTRIBUTION LINES 1,833,536,018 2,020,099,190.82 186,563,172.67
389 Land and Land Rights 20,940,797 21,077,173.52 136,376.58
390 Structures and Improvements 170,196,006 187,603,356.39 17,407,350.64
391 Office Furniture, Equipment 41,438,522 45,895,872.77 4,457,350.41
392 Transportation Equipment 119,914,591 146,232,891.07 26,318,299.96
393 Stores Equipment 5,476,857 8,997,577.75 3,520,720.79
394 Tools, Shop, Garage Equipment 15,380,479 16,583,328.91 1,202,850.02
395 Laboratory Equipment 14,914,034 16,747,259.21 1,833,225.66
396 Power Operated Equipment 27,588,092 31,516,343.02 3,928,251.12
397 Communication Equipment 82,670,542 89,930,528.21 7,259,986.61
398 Miscellaneous Equipment 11,406,368 11,482,711.48 76,343.94
TOTAL GENERAL EQUIPMENT PLANT 509,926,287 576,067,042.33 66,140,755.74
SUBTOTAL W/O ARO 6,323,823,741 7,184,190,288.70 860,366,548
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 2 of 14
Incremental Plant Determination

ACTUAL ADJUSTED
December-23 December-23 JANUARY FEBRUARY
Boardman Bridger
ACCOUNT DESCRIPTION BALANCE Adjustments Adjustments Valmy Adjustments BALANCE Adjusted Closings+ Adjusted Retirements= BALANCE Total Closings+ Retirements = BALANCE
ACCT
301 Organization 5,703.01 5,703.01 0.00 0.00 5,703.01 0.00 0.00 5,703.01
302 Franchises and Consents 54,064,548.50 54,064,548.50 17,054.90 0.00 54,081,603.40 521,465.22 0.00 54,603,068.62
303 Miscellaneous Intangible Plant 61,504,910.47 61,504,910.47 16,705.90 12,077.03 61,509,539.34 218,171.00 0.00 61,727,710.34
TOTAL INTANGIBLE PLANT 115,575,161.98 0.00 0.00 0.00 115,575,161.98 33,760.80 12,077.03 115,596,845.75 739,636.22 0.00 116,336,481.97
310 Land and Land Rights 1,722,421.20 (106,609.86) (162,075.40) (1,106,140.27) 347,595.67 0.00 0.00 347,595.67 0.00 0.00 347,595.67
311 Structures and Improvements 122,135,411.52 (36,925,147.03) (47,906,559.55) 37,303,704.94 0.00 0.00 37,303,704.94 0.00 0.00 37,303,704.94
312 Boiler Plant Equipment 636,004,939.11 (309,271,976.37) (141,329,006.49) 185,403,956.25 0.00 0.00 185,403,956.25 0.00 0.00 185,403,956.25
314 Turbogenerator Units 143,045,841.63 (46,837,425.50) (39,829,749.92) 56,378,666.21 0.00 0.00 56,378,666.21 0.00 0.00 56,378,666.21
315 Accessory electric Equipment 54,669,297.80 (16,126,040.21) (22,069,556.31) 16,473,701.28 (0.00) 0.00 16,473,701.28 0.00 0.00 16,473,701.28
316 Misc Power Plant Equipment 19,930,767.91 5,563,455.10 5,943,367.21 8,423,945.60 0.00 0.00 8,423,945.60 0.00 0.00 8,423,945.60
TOTAL STEAM PRODUCTION PLANT 977,508,679.17 106,609.86 414,886,119.61 258,184,379.75 304,331,569.95 0.00 0.00 304,331,569.95 0.00 0.00 304,331,569.95
330 Land and Land Rights 31,695,741.47 31,695,741.47 1,139.51 0.00 31,696,880.98 0.00 0.00 31,696,880.98
331 Structures and Improvements 268,903,107.87 268,903,107.87 12,844.30 0.00 268,915,952.17 1,203,852.98 (61,219.13) 270,058,586.02
332 Reservoirs,Dams,Waterways 312,287,739.29 312,287,739.29 17,499.85 (3,451.52) 312,301,787.62 233,737.94 (12,758.45) 312,522,767.11
333 Waterwheel,Turbines,Generato 398,767,042.05 398,767,042.05 (22,296.43) 0.00 398,744,745.62 1,238,217.43 (68,942.53) 399,914,020.52
334 Accessory Electric Equipment 76,190,449.29 76,190,449.29 (78,523.34) (3,026.02) 76,108.899.93 112,209.84 (12,825.66) 76,208,284.11
335 Misc Power Plant Equipment 33,078,416.73 33,078,416.73 36,399.72 0.00 33,114,816.45 71,840.13 (24,293.44) 33,162,363.15
336 Roads,Railroads and Bridges 19,342,200.77 19,342,200.77 63,685.86 0.00 19,405,886.63 51,510.45 (13.38) 19,457,383.70
TOTAL HYDRO PRODUCTION PLANT 1,140,264,697.47 0.00 0.00 0.00 1,140,264,697.47 30,749.47 6,477.54 1,140,288,969.40 2,911,368.78 180,052.59 1,143,020,285.59
340 LAND AND LAND RIGHTS 2,699,793.95 2,699,793.95 0.00 0.00 2,699,793.95 0.00 0.00 2,699,793.95
341 Structures and Improvements 154,940,383.08 154.940,383.08 28,134.09 0.00 154,968,517.17 11,631.56 (696.90) 154,979,451.83
342 Fuel Holders,Producers,Acces 10,438,247.49 10,438,247.49 0.00 0.00 10,438,247.49 188.16 (293.57) 10,438,142.08
343 Prime Movers 294,719,247.73 294,719,247.73 (223,394.47) 0.00 294,495,853.26 48,363.17 (53,286.72) 294,490,929.71
344 Generators 72,448,963.87 72,448,963.87 (4,782,583.42) 0.00 67,666,380.45 176.81 (21.23) 67,666,536.04
345 Accessory Electric Equipment 93,819,601.05 93,819,601.05 4,557.98 0.00 93,824,159.03 1,975.37 (466.96) 93,825,667.44
346 Misc Power Plant Equipment 7,774,242.07 7,774,242.07 0.00 0.00 7,774,242.07 1,514.92 482.83 7,775,274.16
TOTAL OTHER PRODUCTION PLANT 636,840,479.24 0.00 0.00 0.00 636,840,479.24 4,973,285.82 0.00 631,867,193.42 63,850.00 55,248.21 631,875,795.21
3501X Land 4,502,593.08 4,502,593.08 (173,946.36) 0.00 4,328,646.72 0.00 0.00 4,328,646.72
35020 Land Rights and Easements 37,340,279.85 37,340,279.85 46,354.01 0.00 37,386,633.86 39,300.09 0.00 37,425,933.95
35022 Transm ROW Renewal Cost 1,321,169.55 1,321,169.55 117.94 0.00 1,321,287.49 1,651.26 0.00 1,322,938.75
352 Structures and Improvements 106,293,359.74 (140,406.10) (380,257.64) 105,772,696.00 566,205.61 (10,956.45) 106,327,945.16 490,241.85 (46,061.57) 106,772,125.44
353 Station Equipment 493,035,296.34 (4,470,773.20) (4,287,793.71) 484,276,729.43 6,076,686.76 (1,950.00) 490,351,466.19 3,912,494.10 (1,615,219.37) 492,648,740.92
354 Towers and Fixtures 232,601,840.66 232,601,840.66 298,317.23 0.00 232,900,157.89 488,354.87 (10,986.71) 233,377,526.05
355 Poles and Fixtures 245,301,825.40 245,301,825.40 940,637.78 0.00 246,242,463.18 653,194.01 (84,216.32) 246,811,440.87
356 Overhead Conductors,Devices 271,536,308.82 271,536,308.82 416,830.29 0.00 271,953,139.11 550,841.78 (78,813.69) 272,425,167.20
359 Roads and Trails 405,090.98 405,090.98 0.00 0.00 405,090.98 0.00 0.00 405,090.98
TOTAL TRANSMISSION PLANT 1,392,337,764.42 0.00 4,611,179.30 4,668,051.35 1,383,058,533.77 8,171,203.26 12,906.45 1,391,216,830.58 6,136,077.95 1,835,297.65 1,395,517,610.87
360 Land and Land Rights 9,075,556.85 9,075,556.85 165.64 0.00 9,075,722.49 618,477.00 0.00 9,694,199.49
361 Structures and improvements 66,084,348.25 66,084,348.25 (310,226.09) (4,850.40) 65,769.271.76 476,720.37 (27,095.00) 66,218,897.12
362 Station Equipment 338,795,158.69 338,795,158.69 237,475.56 3,200.00 338,554,483.13 2,097,708.10 322,435.55 340,329,755.68
TOTAL SUBSTATION EQUIPMENT 413,955,063.79 0.00 0.00 0.00 413,955,063.79 (547,536.01) (8,050.40) 413,399,477.38 3,192,905.46 (349,530.55) 416,242,852.29
363 Storage Battery Equipment 140,772,713.34 140,772,713.34 356,977.72 0.00 141,129,691.06 0.00 0.00 141,129,691.06
TOTAL STORAGE BATTERY EQUIPMENT 140,772,713.34 0.00 0.00 0.00 140,772,713.34 356,977.72 0.00 141,129,691.06 0.00 0.00 141,129,691.06
364 Poles,Towers and Fixtures 344,304,526.41 344,304,526.41 547,014.37 (406,302.58) 344,445,238.20 1,904,387.27 (521,382.97) 345,828,242.50
365 Overhead Conductors,Devices 165,014,147.73 165,014,147.73 343,776.37 (273,237.87) 165,084,686.23 812,838.67 (297,208.94) 165,600,315.96
366 Underground Conduit 57,714,926.36 57,714,926.36 (1,034,980.79) (30,355.08) 56,649,590.49 228,827.23 (69,379.11) 56,809,038.60
367 Underground Conductors,Device 351,104,223.52 351,104,223.52 (896,072.09) (381,829.74) 349,826,321.69 1,373,187.24 (194,084.51) 351,005,424.43
368 Line Transformers 777,303,575.61 777,303,575.61 3,833,509.89 (754,921.62) 780,382,163.88 2,631,923.90 (467,848.11) 782,546,239.67
369 Services 72,438,102.73 72,438,102.73 333,239.69 (39,413.71) 72,731,928.71 72,170.53 (9,843.74) 72,794,255.50
37000 Meters 19,630,358.60 19,630,358.60 37,048.17 (14,329.44) 19,653,077.33 73,835.08 (44,957.40) 19,681,955.01
37010 Meters-AMI 99,291,362.59 99,291,362.59 572,946.38 0.00 99,864,308.97 845,388.23 (347,400.85) 100,362,296.35
371 Installations,Cust Premises 5,844,012.79 5,844,012.79 46,908.22 (12,649.29) 5,878,271.72 156.00 (66.27) 5,878,361.45
373 Street Lighting,Signal System 7,085,273.43 7,085,273.43 47,223.01 2,639.58 7,129,856.86 671.85 373.18 7,130,155.52
TOTAL DISTRIBUTION LINES 1,899,730,509.77 0.00 0.00 0.00 1,899,730,509.77 3,830,613.22 1,915,678.91 1,901,645,444.08 7,943,386.00 1,952,545.08 1,907,636,285.00
389 Land and Land Rights 21,077,173.52 21,077,173.52 0.00 0.00 21,077,173.52 0.00 0.00 21,077,173.52
390 Structures and Improvements 178,408,553.24 178.408,553.24 844,568.07 0.00 179,253,121.31 1,049,230.00 (253,945.55) 180,048,405.76
391 Office Furniture,Equipment 42,146,172.99 42,146,172.99 145,693.43 (1,799,216.07) 40,492,650.35 721,976.00 (608,429.39) 40,606,196.96
392 Transportation Equipment 131,015,979.11 131,015,979.11 1,533,719.52 0.00 132,549,698.63 1,981,137.00 (877,172.14) 133,653,663.49
392 Stores Equipment 7,753,504.48 7,753,504.48 (132,946.96) 0.00 7,620,557.52 112,319.00 0.00 7,732,876.52
394 Tools,Shop,Garage Equipment 15,757,638.34 15,757,638.34 50,896.54 0.00 15,808.534.88 65,214.00 0.00 15,873,748.88
395 Laboratory Equipment 16,451,896.00 16,451,896.00 5,139.15 0.00 16,457,035.15 89,270.00 0.00 16,546,305.15
396 Power Operated Equipment 31,332,414.44 31,332,414.44 140,868.59 0.00 31,473.283.03 3,786.00 (991.56) 31,476,077.47
397 Communication Equipment 81,680,577.28 81,680,577.28 385,003.54 (41,302.99) 82,024,277.83 327,023.49 (402,063.82) 81,949,237.50
398 Miscellaneous Equipment 10,914,929.39 10,914,929.39 78,804.73 (83,009.01) 10,910,725.11 82,656.00 0.00 10,993,381.11
TOTAL GENERAL EQUIPMENT PLANT 536,538,838.79 0.00 0.00 0.00 536,538,838.79 3,051,746.61 1,923,528.07 537,667,057.33 4,432,611.49 2,142,602.46 539,957,066.36
SUBTOTAL W/O ARO 7,253,523,907.97 106,609.86 419,497,298.91 262,852,431.10 6,571,067,568.10 9,954,229.25 3,878,718.40 6,577,143,078.95 25,419,835.90 6,515,276.55 6,596,047,638.30
317 Asset Retire Cost Steam Prod 39,919,735.75 39,919,735.75 0.00 0.00 39,919,735.75 0.00 0.00 39,919,735.75
374 Asset Retirement Cost-Dist Pit 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
TOTAL ASSET RETIREMENT OBLIGATIONS 39,919,735.75 0.00 0.00 0.00 39,919,735.75 0.00 0.00 39,919,735.75 0.00 0.00 39,919,735.75
TOTAL ELECTRIC PLANT IN SERVICE 7,293,443,643.72 106,609.86 419,497,298.91 262,852,431.10 6,610,987,303.85 9,954,229.25 3,878,718.40 6,617,062,814.70 25,419,835.90 6,515,276.55 6,635,967,374,05
M.Larkin Workpaper
Case No. IPC-E-24-07
LARKIN Workpaper 3-Incremental Plant Determination.xlsx Page 3 of 14
Elec Plant In Service Incremental Plant Determination

13 MONTH
ACCOUNT 101-ELECTRIC PLANT IN SERVICE
ACTUALS FOR DECEMBER 2023 THRU JANUARY 2024
ESTIMATED FEBRUARY THRU DECEMBER 2024
MARCH APRIL MAY JUNE
ACCOUNT DESCRIPTION Total Closings+Retirements = BALANCE Total Closings+ Retirements = BALANCE Total Closings+ Retirements = BALANCE Total Closings+ Retirements = BALANCE
ACCT
301 Organization 0.00 0.00 5,703.01 0.00 0.00 5,703.01 0.00 0.00 5,703.01 0.00 0.00 5,703.01
302 Franchises and Consents 342,470.77 0.00 64,945,539.39 28,065.23 0.00 64,973,604.61 174,415.03 0.00 55,148,019.65 326,722.13 0.00 65,474,741.78
303 Miscellaneous Intangible Plant 649,580.00 0.00 62,377,290.34 264,561.00 46,079.19 62,595,772.15 121,172.00 0.00 62,716,944.15 775,687.00 54,354.59 63,438,276.56
TOTAL INTANGIBLE PLANT 992,050.77 0.00 117,328,632.74 292,626.23 46,079.19 117,575,079.77 295,587.03 0.00 117,870,666.81 1,102,409.13 54,354.59 118,918,721.35
310 Land and Land Rights 0.00 0.00 347,595.67 0.00 0.00 347,695.67 0.00 0.00 347,696 67 0.00 0.00 347,595.67
311 Structures and Improvements 0.00 0.00 37,303,704.94 0.00 0.00 37,303,704.94 0.00 0.00 37,303,704.94 0.00 0.00 37,303,704.94
312 Boiler Plant Equipment 0.00 0.00 186,403,966.25 0.00 0.00 186,403,956.25 0.00 0.00 186,403,956.25 0.00 0.00 186,403,966.25
314 Turbogenerator Units 0.00 0.00 56,378,666.21 0.00 0.00 56,378,666.21 0.00 0.00 56,378,666.21 0.00 0.00 56,378,666.21
315 Accessory electric Equipment 0.00 0.00 16,473,701.28 0.00 0.00 16,473,701.28 0.00 0.00 16,473,701.28 0.00 0.00 16,473,701.28
316 Misc Power Plant Equipment 0.00 0.00 8,423,945.60 0.00 0.00 8,423,945.60 0.00 0.00 8,423,945.60 0.00 0.00 8,423,945.60
TOTAL STEAM PRODUCTION PLANT 0.00 0.00 304,331,569.95 0.00 0.00 304,331,569.95 0.00 0.00 304,331,569.95 0.00 0.00 304,331,569.95
330 Land and Land Rights 0.00 0.00 31,696,880.98 0.00 0.00 31,696,880.98 0.00 0.00 31,696,880.98 0.00 0.00 31,696,880.98
331 Structures and Improvements 1,233,786.15 (62,741.32) 271,229,630.85 473,922.57 (24,100.23) 271,679,453.19 1,130,584.96 (57,493.26) 272,752,544.90 1,206,085.17 (61,332.65) 273,897,297.42
332 Reservoirs,Dams,Waterways 555,063.16 (30,297.81) 313,047,532.44 383,302.73 (20,922.37) 313,409,912.81 737,773.05 (40,270.93) 314,107,414.93 555,847.72 (30,340.64) 314,632,922.02
333 Waterwheel,Turbines,Generato 3,171,438.26 (176,582.05) 402,908,876.74 2,243,805.99 (124,932.54) 405,027,750.19 4,287,784.68 (238,738.93) 409,076,795.93 3,180,106.93 (177,064.71) 412,079,838.16
334 Accessory Electric Equipment 287,402.34 (32,850.27) 76,462,836.18 203,338.37 (23,241.70) 76,642,932.85 388,567.97 (44,413.56) 76,987,087.25 288,187.91 (32,940.06) 77,242,335.10
335 Misc Power Plant Equipment 169,494.86 (57,316.33) 33,274,541.67 116,788.62 (39,493.20) 33,351,837.09 224,940.87 (76,065.94) 33,500,712.02 169,714.40 (57,390.57) 33,613,035.85
336 Roads,Railroads and Bridges 85,531.48 (22.22) 19,542,892.97 50,504.49 (13.12) 19,593,384.34 102,154.43 (26.54) 19,695,512.23 84,985.73 (22.08) 19,780,475.89
TOTAL HYDRO PRODUCTION PLANT 5,502,716.23 359,809.99 1,148,163,191.83 3,471,662.77 232,703.16 1,151,402,151.44 6,871,805.97 457,009.16 1,157,816,948.25 5,484,927.87 359,090.70 1,162,942,785.42
340 LAND AND LAND RIGHTS 0.00 0.00 2,699,793.95 0.00 0.00 2,699,793.95 0.00 0.00 2,699,793.95 0.00 0.00 2,699,793.95
341 Structures and Improvements 277,980.43 (16,655.15) 155,240,777.11 49,532.59 (2,967.74) 155,287,341.96 42,286.96 (2,533.62) 155,327,095.30 785,237.20 (47,047.34) 156,065,285.16
342 Fuel Holders,Producers,Acres 4,496.84 (7,015.93) 10,435,623.00 801.28 (1,250.15) 10,435,174.13 684.07 (1,067.28) 10,434,790.92 12,702.65 (19,818.55) 10,427,675.01
343 Prime Movers 1,155,822.20 (1,273,489.21) 294,373,262.70 205,952.87 (226,919.65) 294,352,295.93 175,826.07 (193,725.82) 294,334,396.18 3,264,958.61 (3,697,343.57) 294,002,011.22
344 Generators 4,225.60 (507.26) 67,670,254.37 752.95 (90.39) 67,670,916.93 642.81 (77.17) 67,671,482.57 11,936.44 (1,432.91) 67,681,986.09
345 Accessory Electric Equipment 47,209.08 (11,159.81) 93,861.716.71 8,412.06 (1,988.54) 93,868,140.23 7,181.54 (1,697.65) 93,873,624.12 133,355.89 (31,524.16) 93,975.455.85
346 Misc Power Plant Equipment 36,204.85 11,539.15 7,799,939.86 6,451.25 2,056.13 7,804,334.98 5,507.56 1,755.36 7,808,087.18 102,271.22 32,595.71 7,877,762.69
TOTAL OTHER PRODUCTION PLANT 1,625,939.00 1,320,366.51 632,081,367.70 271,903.00 235,272.59 632,117,998.11 232,129.00 200,856.89 632,149,270.22 4,310,462.00 3,729,762.25 632,729,969.97
3501X Land 0.00 0.00 4,328,646.72 0.00 0.00 4,328,646.72 0.00 0.00 4,328,646.72 0.00 0.00 4,328,646.72
35020 Land Rights and Easements 129,564.36 0.00 37,555,498.31 66,677.91 0.00 37,622,176.22 27,344.20 0.00 37,649,520.41 151,725.74 0.00 37,801,246.15
35022 Transm ROW Renewal Cost 6,443.86 0.00 1,328,382.60 2,801.68 0.00 1,331,184.18 1,148.91 0.00 1,332,333.09 6,376.00 0.00 1,338,708.09
352 Structures and Improvements 203,820.73 (19,150.35) 106,956,795.82 305,897.39 (28,741.15) 107,233,952.06 95,734.45 (8,994.90) 107,320,691.61 214,452.37 (20,149.26) 107,514,994.72
353 Station Equipment 2,041,113.48 (842,645.62) 493,847,208.78 2,517,546.63 (1,039,334.49) 495,325,420.92 820,464.33 (338,717.41) 496,807,167.84 2,247,436.73 (927,823.34) 497,126,781.23
354 Towers and Fixtures 1,610,006.39 (36,220.93) 234,951,311.51 828,560.05 (18,640.43) 235,761,231.12 339,787.35 (7,644.33) 236,093,374.15 1,885,390.39 (42,416.35) 237,936,348.18
366 Poles and Fixtures 2,153,447.41 (277,644.04) 248,687,244.24 1,108,231.93 (142,884.38) 249,652,591.79 464,479.07 (58,596.00) 260,048,474.86 2,521,784.43 (326,133.74) 252,245,126.55
356 Overhead Conductors,Devices 1,816,012.99 (259,832.66) 273,981,347.52 934,577.54 (133,718.08) 274,782,206.98 383,264.47 (54,836.96) 275,110,634.50 2,126,633.44 (304,275.81) 276,932,992.13
359 Roads and Trails 0.00 0.00 405,090.98 0.00 0.00 405,090.98 0.00 0.00 405,090.98 0.00 0.00 405,090.98
TOTAL TRANSMISSION PLANT 7,959,409.21 1,435,493.60 1,402,041,526.48 5,764,293.02 1,363,318.53 1,406,442,500.97 2,122,222.79 468,789.60 1,408,095,934.15 9,153,798.10 1,619,798.51 1,415,629,933.75
360 Land and Land Rights 198,200.00 0.00 9,892,399.49 0.00 0.00 9,892,399.49 0.00 0.00 9,892,399.49 0.00 0.00 9,892,399.49
361 1 Structures and improvements 787,378.00 (44,751.62) 66,961.523.50 593,286.60 (33,720.19) 67,521,089.91 697,342.85 (39,634.36) 68,178,798.40 2,275,113.34 (129,308.93) 70,324.602.80
362 1 Station Equipment 3,464,861.14 532,578.59 343,262,038.23 2,610,624.72 401,275.19 345,471,387.76 3,068,551.16 471,662.38 348,068,276.54 10,011,122.99 1,538,794.63 356,540,604.90
TOTAL SUBSTATION EQUIPMENT 4,450,439.14 (577,330.21) 420,115,961.22 3,203,911.32 (434,995.38) 422,884,877.16 3,765,894.01 (511,296.74) 426,139,474.43 12,286,236.33 (1,668,103.57) 436,757,607.20
363 Storage Battery Equipment 26,958,698.48 0.00 168,088,389.54 0.00 0.00 168,088,389.54 0.00 0.00 168,088,389.54 199,264,922.43 0.00 367,353,311.98
TOTAL STORAGE BATTERY EQUIPMENT 26,958,698.48 0.00 168,088,389.54 0.00 0.00 168,088,389.54 0.00 0.00 168,088,389.54 199,264,922.43 0.00 367,353,311.98
364 Poles,Towers and Fixtures 3,829,822.84 (1,048,528.54) 348,609,536.80 2,018,109.77 (552,517.90) 350,075,128.67 2,518,841.76 (689,608.26) 351,904,362.17 5,517,901.67 (1,510,690.60) 355,911,573.23
365 Overhead Conductors,Devices 1,636,566.31 (598,033.71) 166,637,848.56 835,582.49 (305,525.06) 167,167,905.98 1,105,367.18 (404,170.00) 167,869,103.16 2,385,239.20 (872,146.52) 169,382,196.85
366 Underground Conduit 382,469.71 (115,962.64) 57,075,545.67 282,971.12 (85,795.23) 57,272,721.55 367,359.15 (111,381.21) 57,528,699.50 631,471.10 (191,458.45) 57,968,712.14
367 Underground Conductors,Device 2,296,192.61 (324,399.54) 362,976,217.40 1,698,103.57 (240,007.76) 354,434,313.20 2,204,514.32 (311,583.20) 366,327,244.33 3,789,444.43 (535,595.17) 359,581,093.59
368 Line Transformers 5,300,398.07 (942,193.35) 786,904,444.39 2,286,338.41 (406,417.18) 788,784,365.62 4,075,148.80 (724,394.29) 792,135,120.12 8,194,491.05 (1,456,644.37) 798,872,966.81
369 Services 146,241.16 (19,946.65) 72,920.550.00 73,585.92 (10,036.80) 72,984,099.13 96,316.35 (13,137.13) 73,067,278.35 210,349.00 (28,690.68) 73,248.936.68
37000 Meters 129,012.54 (78,554.38) 19,732,413.17 59,642.15 (36,315.48) 19,755,739.85 107,037.68 (65,174.12) 19,797,603.41 183,813.05 (111,921.83) 19,869,494.63
37010 Meters-AMI 942,774.02 (387,420.22) 100,917,650.15 805,127.81 (330,856.38) 101,391,921.58 820,829.76 (337,308.88) 101,875,442.46 691,842.83 (284,303.45) 102,282,981.84
371 Installations,Cust Premises 141.00 (59.89) 5,878,442.56 90.00 (38.23) 5,878,494.33 117.00 (49.70) 5,878,561.63 74.00 (31.43) 5,878,604.19
373 1 Street Lighting,Signal System 2,841.85 1,578.53 7,131,418.85 130.77 72.64 7,131,476.98 434.00 241.07 7,131,669.91 4,454.67 2,474.38 7,133,650.20
TOTAL DISTRIBUTION LINES 14,664,460.00 3,516,677.45 1,918,784,067.55 8,059,682.00 1,967,582.66 1,924,876,166.89 11,295,966.00 (2,657,047.85). 1,933,515,085.04 21,609,081.00 4,993,956.87 1,950,130,209.17
389 Land and Land Rights 0.00 0.00 21,077,173.52 0.00 0.00 21,077,173.52 0.00 0.00 21,077,173.52 0.00 0.00 21,077,173.52
390 Structures and Improvements 1,796,464.00 (434,798.89) 181,410,070.87 928,627.00 (224,755.96) 182,113,941.91 265,988.00 (64,377.18) 182,315,552.73 1,116,168.00 (270,146.58) 183,161,574.15
391 Office Furniture,Equipment 837,702.00 (244,359.31) 41,199,539.65 589,846.00 (156,034.56) 41,633,351.09 483,350.00 (400,766.76) 41,715,934.33 1,503,251.00 (1,098,507.00) 42,120,678.33
392 Transportation Equipment 3,118,366.00 (1,380,693.91) 135,391,335.58 2,138,723.00 (946,945.23) 136,583,113.35 578,369.00 (256,079.80) 136,905,402.55 1,640,856.00 (726,508.65) 137,819,749.90
393 Stores Equipment 453,097.00 0.00 8,185,973.52 139,597.00 0.00 8,325,570.52 8,748.00 0.00 8,334,318.52 5,457.00 0.00 8,339,775.52
394 Tools,Shop,Garage Equipment 59,587.00 (2,449.55) 15,930.886.33 53,896.00 0.00 15,984,782.33 37,820.00 (27,763.70) 15,994,838.63 95,697.00 (33,100.81) 16,057.434.82
395 Laboratory Equipment 86,447.00 0.00 16,632,752.15 110,109.00 (26,597.00) 16,716,264.15 22,146.00 (3,987.36) 16,734,422.79 45,135.00 0.00 16,779,557.79
396 Power OperatedEquipment 795.00 (208.21) 31,476.664.26 10,921.00 (2,860.22) 31,484,725.05 2,773.00 (726.25) 31,486,771.80 5,938.00 (1,555.17) 31,491.154.63
397 Communication Equipment 703,723.50 (362,781.47) 82,290,179.53 348,243.19 (285,346.66) 82,353,076.06 1,148,338.34 (167,358.03) 83,334,056.37 817,374.03 (287,117.16) 83,864,313.24
398 1 Miscellaneous Equipment 77,760.00 (844.33) 11,070,296.78 13,902.00 0.00 11,084,198.78 41,611.00 0.00 11,125,809.78 427,820.00 (136,244.18) 11,417,385.60
TOTAL GENERAL EQUIPMENT PLANT 7,133,941.50 2,426,135.66 544,664,872.20 4,333,864.19 1,642,539.62 547,356,196.76 2,589,143.34 921,059.08 549,024,281.02 5,657,696.03 2,553,179.55 552,128,797.50
SUBTOTAL W/O ARO 69,187,654.33 9,635,813.43 6,655,599,479.21 25,397,942.53 5,922,491.14 6,675,074,930.60 27,172,748.13 5,216,059.32 6,697,031,619.41 258,869,532.90 14,978,246.02 6,940,922,906.29
317 Asset Retire Cost Steam Prod 0.00 0.00 39,919,735.75 0.00 0.00 39,919,735.75 0.00 0.00 39,919,735.75 0.00 0.00 39,919,735.75
374 Asset Retirement Cost-Dist Pit 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
TOTAL ASSET RETIREMENT OBLIGATIONS 0.00 0.00 39,919,735.75 0.00 0.00 39,919,735.75 0.00 0.00 39,919,735.75 0.00 0.00 39,919,735.75
TOTAL ELECTRIC PLANT IN SERVICE 69,187,654.33 9,635,813,43 6,695,519,214.96 25,397,942.53 5,922,491.14 6,714,994,666.35 1 27,172,748.13 5,216,059.32 6,736,951,366.16 258,869,532.90 14,978,246.02 6,980,842,642.04
M.Larkin Workpaper
Case No. IPC-E-24-07
LARKIN Workpaper 3-Incremental Plant Determination.xlsx Page 4 of 14
Elec Plant In Service Incremental Plant Determination

JULY AUGUST SEPTEMBER
ACCOUNT DESCRIPTION Total Closings+ Retirements = BALANCE Total Closings+ Retirements = BALANCE Total Closings+ Retirements = BALANCE
ACCT
301 Organization 0.00 0.00 5,703.01 0.00 0.00 5,703.01 0.00 0.00 5,703.01
302 Franchises and Consents 357,583.54 0.00 55,832,325.32 96,175.30 0.00 55,928,500.62 8,108,488.08 0.00 64,036,988.70
303 Miscellaneous Intangible Plant 58,615.00 0.00 63,496,891.56 158,907.00 0.00 63,655,798.56 335,663.00 0.00 63,991,461.56
TOTAL INTANGIBLE PLANT 416,198.54 0.00 119,334,919.89 255,082.30 0.00 119,590,002.19 8,444,151.08 0.00 128,034,153.27
310 Land and Land Rights 0.00 0.00 347,595.67 0.00 0.00 347,595.67 0.00 0.00 347,595.67
311 Structures and Improvements 0.00 0.00 37,303,704.94 0.00 0.00 37,303,704.94 0.00 0.00 37,303,704.94
312 Boiler Plant Equipment 0.00 0.00 185,403,956.25 0.00 0.00 185,403,956.25 0.00 0.00 185,403,956.25
314 Turbogenerator Units 0.00 0.00 56,378,666.21 0.00 0.00 56,378,666.21 0.00 0.00 56,378,666.21
315 Accessory electric Equipment 0.00 0.00 16,473,701.28 0.00 0.00 16,473,701.28 0.00 0.00 16,473,701.28
316 Misc Power Plant Equipment 0.00 0.00 8,423,945.60 0.00 0.00 8,423,945.60 0.00 0.00 8,423,945.60
TOTAL STEAM PRODUCTION PLANT 0.00 0.00 304,331,569.95 0.00 0.00 304,331,569.95 0.00 0.00 304,331,569.95
330 Land and Land Rights 0.00 0.00 31,696,880.98 0.00 0.00 31,696,880.98 0.00 0.00 31,696,880.98
331 Structures and Improvements 1,107,482.56 (56,318.44) 274,948,461.53 310,474.50 (15,788.46) 275,243,147.58 15,321,801.13 (779,154.44) 289,785,794.27
332 Reservoirs,Dams,Waterways 415,776.72 (22,694.94) 315,026,003.80 123,250.48 (6,727.56) 315,142,526.73 556,005.99 (30,349.28) 315,668,183.44
333 Waterwheel,Turbines,Generato 2,349,546.15 (130,820.04) 414,298,564.27 699,019.54 (38,920.61) 414,958,663.20 1,174,382.30 (65,388.26) 416,067,657.23
334 Accessory Electric Equipment 212,920.76 (24,336.98) 77,430,918.89 63,346.61 (7,240.56) 77,487,024.93 106,424.97 (12,164.44) 77,581,285.46
335 Misc Power Plant Equipment 127,086.87 (42,975.66) 33,697,147.07 37,660.78 (12,735.36) 33,722,072.49 179,366.62 (60,654.56) 33,840,784.55
336 Roads,Railroads and Bridges 68,218.40 (17.72) 19,848,676.57 19,818.79 (5.15) 19,868,490.21 404,589.72 (105.09) 20,272,974.84
TOTAL HYDRO PRODUCTION PLANT 4,281,031.46 277,163.77 1,166,946,653.11 1,253,570.70 81,417.69 1,168,118,806.12 17,742,570.73 947,816.08 1,184,913,560.78
340 LAND AND LAND RIGHTS 0.00 0.00 2,699,793.95 0.00 0.00 2,699,793.95 0.00 0.00 2,699,793.95
341 Structures and Improvements 205,486.03 (12,311.66) 156,258,459.53 71,294.26 (4,271.58) 156,325,482.21 35,244.26 (2,111.65) 156,358,614.82
342 Fuel Holders,Producers,Acces 3,324.11 (5,186.25) 10,425,812.88 1,153.31 (1,799.39) 10,425,166.80 570.14 (889.53) 10,424,847.42
343 Prime Movers 864,395.81 (941,376.49) 293,916,030.54 296,436.31 (326,614.64) 293,884,852.22 146,543.06 (161,461.69) 293,869,933.69
344 Generators 3,123.60 (374.97) 67,684,734.72 1,083.75 (130.10) 67,685,688.37 535.75 (64.31) 67,686,159.81
345 Accessory Electric Equipment 34,897.44 (8,249.45) 94,002,103.84 12,107.82 (2,862.18) 94,011,349.48 5,985.49 (1,414.92) 94,016,920.05
346 Misc Power Plant Equipment 26,763.01 8,529.86 7,895,995.84 9,285.54 2,959.47 7,902,321.91 4,590.30 1,463.01 7,905,449.19
TOTAL OTHER PRODUCTION PLANT 1,127,990.00 976,028.68 632,881,931.30 391,361.00 338,637.36 632,934,654.94 193,469.00 167,405.11 632,960,718.82
3501X Land 0.00 0.00 4,328,646.72 0.00 0.00 4,328,646.72 0.00 0.00 4,328,646.72
35020 Land Rights and Easements 20,104.66 0.00 37,821,350.81 38,821.75 0.00 37,860,172.56 29,928.67 0.00 37,890,101.24
35022 Transm ROW Renewal Cost 844.73 0.00 1,339,552.82 1,631.16 0.00 1,341,183.98 1,257.50 0.00 1,342,441.48
352 Structures and Improvements 2,909.51 (273.37) 107,517,630.86 90,107.78 (8,466.24) 107,599,272.40 262,033.63 (24,619.85) 107,836,686.17
353 Station Equipment 102,996.13 (42,520.54) 497,187,256.83 811,014.66 (334,816.20) 497,663,455.18 2,226,196.63 (918,641.78) 498,970,009.93
354 Towers and Fixtures 249,826.64 (5,620.45) 238,180,554.38 482,410.96 (10,852.98) 238,652,112.35 371,902.82 (8,366.84) 239,015,648.33
355 Poles and Fixtures 334,153.04 (43,082.36) 252,636,196.22 645,243.80 (83.191.30) 253,098,248.72 497,434.77 (64,134.28) 253,531,549.21
356 Overhead Conductors,Devices 281,792.93 (40,318.55) 277,174,466.51 544,137.33 (77,854.43) 277,640,749.41 419,489.24 (60,019.95) 278,000,218.70
359 Roads and Trails 0.00 0.00 405,090.98 0.00 0.00 405,090.98 0.00 0.00 405,090.98
TOTAL TRANSMISSION PLANT 992,627.64 131,815.26 1,416,490,746.13 2,613,367.33 515,181.15 1,418,588,932.30 3,807,243.15 1,075,782.69 1,421,320,392.76
360 Land and Land Rights 0.00 0.00 9,892,399.49 0.00 0.00 9,892,399.49 0.00 0.00 9,892,399.49
361 Structures and improvements 618,230.09 (35,137.89) 70,907,695.01 198,584.13 (11,286.78) 71,094,992.36 526,534.04 (29,926.23) 71,591,600.17
362 Station Equipment 2,720,513.54 418,166.04 358,842,952.41 873,821.60 134,313.80 359,582,460.20 2,316,903.15 356,127.69 361,543,235.66
TOTAL SUBSTATION EQUIPMENT 3,338,743.64 (453,303.92) 439,643,046.91 1,072,405.72 (145,600.58) 440,569,852.05 2,843,437.18 (386,053.92) 443,027,235.31
363 Storage Battery Equipment 0.00 0.00 367,353,311.98 0.00 0.00 367,353,311.98 0.00 0.00 367,353,311.98
TOTAL STORAGE BATTERY EQUIPMENT 0.00 0.00 367,353,311.98 0.00 0.00 367,353,311.98 0.00 0.00 367,353,311.98
364 Poles,Towers and Fixtures 1,382,565.13 (378,518.55) 356,915,619.81 2,802,061.59 (767,148.16) 358,950,533.24 3,711,918.67 (1,016,248.74) 361,646,203.17
365 Overhead Conductors,Devices 666,255.89 (207,047.62) 169,741,404.12 1,186,146.10 (433,706.27) 170,493,843.96 1,606,506.06 (587,408.03) 171,512,941.98
366 Underground Conduit 269,153.79 (81,605.90) 58,156,260.04 451,995.83 (137,042.57) 58,471,213.30 820,863.71 (248,881.21) 59,043,195.79
367 Underground Conductors,Device 1,616,186.10 (228,288.31) 360,967,991.38 2,712,412.05 (383,368.81) 363,297,034.62 4,926,983.67 (696,232.15) 367,526,786.14
368 Line Transformers 1,516,855.69 (269,634.72) 800,120,187.78 3,767,926.94 (669,782.85) 803,218,331.87 5,985,362.03 (1,063,951.85) 808,139,742.05
369 Services 64,736.50 (7,465.82) 73,296,207.36 110,664.44 (15.094.14) 73,391,777.66 172,591.62 (23,640.72) 73,540,828.46
37000 Meters 46,523.59 (28,327.72) 19,887,690.50 94,460.03 (57,515.71) 19,924,634.81 143,184.06 (87,183.26) 19,980,635.61
37010 Meters-AMI 852,440.31 (350,298.81) 102,785,123.34 902,841.55 (371,010.51) 103,316,954.38 846,281.38 (347,767.88) 103,815,467.88
371 Installations,Cust Premises 78.00 (33.13) 5,878,649.06 71.00 (30.16) 5,878,689.90 55.00 (23.36) 5,878,721.54
373 1 Street Lighting,Signal System 0.00 0.00 7,133,650.20 2,577.47 1,431.68 7,134,795.99 905.91 503.19 7,135,198.71
TOTAL DISTRIBUTION LINES 6,303,795.00 1,551,220.58 1,954,882,783.59 12,031,157.00 2,836,130.86 1,964,077,809.73 18,213,652.00 4,071,740.41 1,978,219,721.32
389 Land and Land Rights 0.00 0.00 21,077,173.52 0.00 0.00 21,077,173.52 0.00 0.00 21,077,173.52
390 Structures and Improvements 524,397.00 (126,920.01) 183,559,051.14 174,427.00 (42.216.64) 183,691,261.51 651,712.00 (157,734.11) 184,185,239.39
391 Office Furniture,Equipment 624,563.00 (114,065.99) 42,631,175.34 762,291.00 (458,144.38) 42,935,321.96 988,819.00 (45,057.52) 43,879,083.44
392 Transportation Equipment 1,747,349.00 (773,669.70) 138,793,439.19 1,931,541.00 (855,212.92) 139,869,767.27 1,819,560.00 (805,631.99) 140,883,695.29
393 Stores Equipment 0.00 0.00 8,339,775.52 32,731.00 0.00 8,372,506.52 91,917.00 0.00 8,464,423.52
394 Tools,Shop,Garage Equipment 45,955.00 (10,769.51) 16,092,620.31 71,553.00 0.00 16,164,173.31 36,458.00 (6,577.62) 16,194,053.69
395 Laboratory Equipment 25,741.00 (56,619.09) 16,748,679.70 10,247.00 (16,530.83) 16,742,395.87 127,826.00 0.00 16,870,221.87
396 Power Operated Equipment 77.00 (20.17) 31,491,211.47 1,541.00 (403.59) 31,492,348.88 3,914.00 (1,025.08) 31,495,237.80
397 Communication Equipment 409,669.42 (190,968.81) 84,083,013.85 175,522.61 (58,673.89) 84,199,862.57 799,601.66 (173,880.15) 84,825,584.09
398 Miscellaneous Equipment 64,266.00 (77,388.99) 11,404,262.61 65,185.00 0.00 11,469,447.61 76,900.00 (38,606.64) 11,507,740.97
TOTAL GENERAL EQUIPMENT PLANT 3,442,017.42 1,350,412.27 554,220,402.65 3,225,038.61 1,431,182.24 556,014,259.02 4,596,707.66 1,228,513.11 559,382,453.58
SUBTOTAL W/O ARO 19,902,403.70 4,739,944.49 6,956,085,365.50 20,841,982.66 5,348,149.88 6,971,579,198.28 55,841,230.81 7,877,311.31 7,019,543,117.78
317 Asset Retire Cost Steam Prod 0.00 0.00 39,919,735.75 0.00 0.00 39,919,735.75 0.00 0.00 39,919,735.75
374 Asset Retirement Cost-Dist Plt 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
TOTAL ASSET RETIREMENT OBLIGATIONS 0.00 0.00 39,919,735.75 0.00 0.00 39,919,735.75 0.00 39,919,735.75
TOTAL ELECTRIC PLANT IN SERVICE 19,902,403.70 4,739,944.49 6,996,005,101.25 1 20,841,982.66 5,348,149.88 7,011,498,934.03 55,841,230.81 7,877,311.31 7,059,462,853.63
M.Larkin Workpaper
Case No. IPC-E-24-07
LARKIN Workpaper 3-Incremental Plant Determination.xlsx Page 5 of 14
Elec Plant In Service Incremental Plant Determination

OCTOBER NOVEMBER DECEMBER 13-MONTH
ACCOUNT DESCRIPTION Total Closings+ Retirements = BALANCE Total Closings+ Retirements = BALANCE Total Closings+ Retirements = BALANCE TOTAL AVERAGE
ACCT
301 Organization 0.00 0.00 5,703.01 0.00 0.00 5,703.01 0.00 0.00 5,703.01 74,139.13 5,703.01
302 Franchises and Consents 870,437.33 0.00 64,907,426.04 695,676.43 0.00 66,603,102.47 2,156,347.94 0.00 67,759,450.41 757,358,919.50 58,258,378.42
303 Miscellaneous Intangible Plant 10,921,312.04 0.00 74,912,773.60 642,966.21 1,322,167.29 74,233,572.52 1,201,179.10 0.00 75,434,751.62 851,595,692.78 65,507,360.98
TOTAL INTANGIBLE PLANT 11,791,749.37 0.00 139,825,902.65 1,338,642.64 1,322,167.29 139,842,378.00 3,357,527.04 0.00 143,199,905.04 1,609,028,761.41 123,771,442.42
310 Land and Land Rights 0.00 0.00 347,696.67 0.00 0.00 347,695.67 0.00 0.00 347,595.67 4,518,743.71 347,595.67
311 Structures and Improvements 0.00 0.00 37,303,704.94 0.00 0.00 37,303,704.94 0.00 0.00 37,303,704.94 484,948,164.22 37,303,704.94
312 Boiler Plant Equipment 0.00 0.00 185,403,956.25 0.00 0.00 185,403,966.25 0.00 0.00 185,403,956.25 2,410,251,431.25 185,403,956.25
314 Turbogenerator Units 0.00 0.00 56,378,666.21 0.00 0.00 56,378,666.21 0.00 0.00 56,378,666.21 732,922,660.73 56,378,666.21
315 Accessory electric Equipment 0.00 0.00 16,473,701.28 0.00 0.00 16,473,701.28 0.00 0.00 16,473,701.28 214,158,116.64 16,473,701.28
316 Misc Power Plant Equipment 0.00 0.00 8,423,945.60 0.00 0.00 8,423,945.60 0.00 0.00 8,423,945.60 109,511,292.80 8,423,945.60
TOTAL STEAM PRODUCTION PLANT 0.00 0.00 304,331,569.95 0.00 0.00 304,331,569.95 0.00 0.00 304,331,569.95 3,956,310,409.35 304,331,569.95
330 Land and Land Rights 0.00 0.00 31,696,880.98 0.00 0.00 31,696,880.98 0.00 0.00 31,696,880.98 412,058,313.23 31,696,793.33
331 Structures and Improvements 1,685,853.33 (85,730.14) 291,385,917.46 1,564,144.29 (79,540.91) 292,870,520.84 5,241,416.28 (266,539.99) 297,845,397.13 3,619,515,811.22 278,424,293.17
332 Reservoirs,Dams,Waterways 96,905.36 (5,289.52) 315,759,799.27 273,865.75 (14,948.81) 316,018,716.22 1,205,108.60 (65,780.18) 317,158,044.63 4,087,083,350.31 314,391,026.96
333 Waterwheel,Turbines,Generato 344,645.09 (19,189.44) 416,393,112.88 1,428,955.07 (79,562.58) 417,742,505.37 6,521,258.41 (363,096.19) 423,900,667.59 5,329,880,239.76 409,990,787.67
334 Accessory Electric Equipment 31,232.46 (3,569.89) 77,608,948.03 129,494.88 (14,801.35) 77,723,641.56 590,970.01 (67,548.25) 78,247,063.33 1,001,921,706.91 77,070,900.53
335 Misc Power Plant Equipment 30,591.63 (10,344.86) 33,861,031.32 84,278.07 (28,499.45) 33,916,809.95 369,737.28 (125,030.25) 34,161,516.98 436,295,085.31 33,561,160.41
336 Roads,Railroads and Bridges 48,224.34 (12.53) 20,321,186.65 63,831.63 (16.58) 20,385,001.71 243,720.46 (63.31) 20.628,658.86 258,142,725.39 19,857,132.72
TOTAL HYDRO PRODUCTION PLANT 2,237,452.20 124,136.38 1,187,026,876.60 3,544,569.69 217,369.67 1,190,354,076.62 14,172,211.04 888,058.16 1,203,638,229.50 15,144,897,232.13 1,164,992,094.78
340 LAND AND LAND RIGHTS 0.00 0.00 2,699,793.95 0.00 0.00 2,699,793.95 0.00 0.00 2,699,793.95 35,097,321.35 2,699,793.95
341 Structures and Improvements 31,368.05 (1,879.41) 156,388,103.45 81,224.54 (4,866.55) 156,464,461.44 788,010.01 (47,213.48) 157,205,257.97 2,026,809,231.01 155,831,479.31
342 Fuel Holders,Producers,Acres 507.44 (791.70) 10,424,563.15 1,313.96 (2,050.02) 10,423,827.09 12,747.50 (19,888.53) 10,416,686.06 135,588,803.51 10,429,907.96
343 Prime Movers 130,426.04 (143,703.90) 293,856,655.73 337,725.66 (372,107.39) 293,822,274.00 3,276,487.76 (3,610,046.42) 293,488,715.33 3,823,605,458.13 294,123,496.78
344 Generators 476.83 (57.24) 67,686,579.39 1,234.70 (148.22) 67,687,665.87 11,978.59 (1,437.97) 67,698,206.49 884,605,554.98 68,046,581.15
345 Accessory Electric Equipment 5,327.20 (1,259.30) 94,019,987.95 13,794.27 (3,260.84) 94,030,521.37 133,826.79 (31,635.48) 94.132,712.68 1,221,260,959.83 93,943,160.76
346 Misc Power Plant Equipment 4,085.45 1,302.11 7,908,232.54 10,578.88 3,371.68 7,915,439.74 102,632.36 32,710.81 7,985,361.28 102,126,683.50 7,855,898.73
TOTAL OTHER PRODUCTION PLANT 172,191.00 148,993.66 632,983,916.17 445,872.00 386,804.71 633,043,983.46 4,325,683.00 3,742,932.69 633,626,733.76 8,228,094,012.31 632,930,308.64
3501X Land 0.00 0.00 4,328,646.72 0.00 0.00 4,328,646.72 0.00 0.00 4,328,646.72 56,446,353.72 4,342,027.21
35020 Land Rights and Easements 418,555.78 0.00 38,308,657.02 110,165.15 0.00 38,418,822.17 719,888.25 0.00 39,138,710.42 492,219,102.97 37,863,007.92
35022 Transm ROW Renewal Cost 17,586.29 0.00 1,360,027.78 4,628.77 0.00 1,364,656.54 30,247.26 0.00 1,394,903.80 17,438,770.15 1,341,443.86
352 Structures and Improvements 206,316.65 (19,384.86) 108,023,617.97 499,108.86 (46,894.68) 108,475,832.15 897,143.04 (84,292.71) 109,288,682.47 1,396,640,922.81 107,433,917.14
353 Station Equipment 1,678,944.89 (693,129.30) 499,955,825.52 4,902.255.43 (2,023,828.71) 502,834,252.23 8,016,852.82 (3,309,647.40) 507,541,457.65 6,463,535,772.65 496,425,828.67
354 Towers and Fixtures 5,201,102.08 (117,011.19) 244,099,739.22 1,368,945.86 (30,797.70) 245,437,887.39 8,945,551.34 (201,251.50) 254,182,187.22 3,103,189,918.46 238,706,916.80
355 Poles and Fixtures 6,956,680.36 (896,925.01) 259,591,304.56 1,831,019.39 (236,073.39) 261,186,260.57 11,965,029.78 (1,542,661.65) 271,608,628.69 3,290,541,343.86 253,118,564.91
356 Overhead Conductors,Devices 5,866,603.39 (839,385.61) 283,027,436.47 1,544,107.83 (220,928.84) 284,350,615.46 10,090,169.54 (1,443,687.70) 292,997,097.29 3,609,912,380.09 277,685,567.70
359 Roads and Trails 0.00 0.00 405,090.98 0.00 0.00 405,090.98 0.00 0.00 405,090.98 5,266,182.74 405,090.98
TOTAL TRANSMISSION PLANT 20,345,789.44 2,565,835.97 1,439,100,346.24 10,260,231.29 2,558,523.33 1,446,802,054.20 40,664,882.01 6,581,530.96 1,480,885,405.25 18,425,190,747.44 1,417,322,365.19
k31
�Lantdd Land Rights 500,00000 0.00 10,392,399.49 0.00 0.00 10,392,399.49 0.00 0.00 10,392,399.49 128,269,473.73 9,866,882.59
es and improvements 602,428.36 (34,239.78) 72,159,788.75 608,092.71 (34,561.72) 72,733,319.74 1,245,321.17 (70,779.40) 73.907,861.51 903,453,789.28 69,496,445.33
Equipment 2,650,840.82 407,456.75 363,786,619.72 2,675,765.42 411,287.87 366,051,097.27 5,479,839.71 842,297.90 370,688,639.07 4,591,516,709.26 353,193,593.02
TOTAL SUBSTATION EQUIPMENT 3,753,269.17 (441,696.52) 446,338,807.96 3,283,858.12 (445,849.59) 449,176,816.50 6,725,160.87 (913,077.30) 454,988,900.07 5,623,239,972.27 432,556,920.94
363 Storage Battery Equipment 0.00 0.00 367,353,311.98 0.00 0.00 367,353,311.98 0.00 0.00 367,353,311.98 3,498,770,447.93 269,136,188.30
TOTAL STORAGE BATTERY EQUIPMENT 0.00 0.00 367,353,311.98 0.00 0.00 367,353,311.98 0.00 0.00 367,353,311.98 3,498,770,447.93 269,136,188.30
364 Poles,Towers and Fixtures 1,453,852.72 (398,035.66) 362,702,020.23 1,854,932.91 (507,843.36) 364,049,109.78 4,913,334.04 (1,345,172.13) 367,617,271.69 4,612,959,365.91 354,843,028.15
365 Overhead Conductors,Devices 595,433.68 (217,716.28) 171,890,659.38 807,668.09 (295,318.35) 172,403,009.12 2,138,877.72 (782,066.11) 173,759,820.73 2,196,557,882.76 168,966,990.98
366 Underground Conduit 623,671.93 (189,093.78) 59,477,773.93 2,034,530.48 (616,858.08) 60,895,446.33 756,567.49 (229,386.96) 61,422,626.86 758,485,750.57 58,345,057.74
367 Underground Conductors,Device 3,742,641.77 (528,980.14) 370,740,447.76 12,209,173.50 (1,725,628.77) 381,223,992.49 4,540,143.46 (641,698.00) 385,122,437.95 4,704,133,528.48 361,856,425.27
368 Line Transformers 1,895,664.61 (336,971.41) 809,698,435.25 4,510,372.04 (801,759.13) 813,407,048.16 7,832,603.34 (1,392,315.58) 819,847,335.92 10,361,359,957.13 797,027,689.01
369 Services 77,120.06 (10,518.84) 73,607,429.68 178,995.40 (24,414.18) 73,762,010.90 206,542.06 (28,171.43) 73,940,381.53 951,723,786.69 73,209,522.05
37000 Meters 52,351.17 (31,876.08) 20,001,110.70 106,268.26 (64,705.62) 20,042,673.34 182,607.74 (111,187.93) 20,114,093.15 258,071,480.11 19,851,652.32
37010 Meters-AMI 854,479.45 (351,136.76) 104,318,810.56 795,982.02 (327,098.04) 104,787,694.54 801,292.64 (329,280.36) 105,269,706.82 1,330,269,721.45 102,328,440.11
371 Installations,Cust Premises 84.00 (35.68) 5,878,769.86 117.00 (49.70) 5,878,837.16 118.00 (50.12) 5,878,905.03 76,387,321.21 5,875,947.79
373 Street Lighting,Signal System 856.63 475.82 7,135,579.52 1,299.16 721.63 7,136,157.05 1,021.51 567.41 7,136,611.15 92,685,494.37 7,129,653.41
TOTAL DISTRIBUTION LINES 9,296,156.00 2,064,840.45 1,985,451,036.87 22,499,338.85 4,364,396.87 2,003,585,978.86 21,373,108.00 4,859,896.03 2,020,099,190.82 25,342,634,288.68 1,949,433,406.82
389 Land and Land Rights 0.00 0.00 21,077,173.52 0.00 0.00 21,077,173.52 0.00 0.00 21,077,173.52 274,003,255.76 21,077,173.52
390 Structures and Improvements 612,286.00 (148,191.58) 184,649,332.81 374,312.00 (90,594.88) 184,933,049.93 3,522,973.00 (852,666.54) 187,603,356.39 2,375,332,511.17 182,717,885.47
391 Office Furniture,Equipment 542,396.00 (35,559.33) 44,385,920.11 921,138.00 (22,436.37) 45,284,621.74 1,661,869.00 (1,050,617.97) 45,895,872.77 554,926,519.06 42,686,655.31
392 Transportation Equipment 2,005,475.00 (887,948.08) 142,001,222.20 1,569,286.00 (694,820.18) 142,875,688.03 6,024,720.00 (2,667,516.96) 146,232,891.07 1,794,575,645.66 138,044,280.44
393 Stores Equipment 21,739.00 (4,640.77) 8,481,521.75 28,227.00 0.00 8,509,748.75 487,829.00 0.00 8,997,577.75 107,458,130.41 8,266,010.03
394 Tools,Shop,Garage Equipment 68,543.00 (85,845.71) 16,176,750.98 27.391.00 (1,768.44) 16,202,373.54 518,298.00 (137,342.63) 16,583,328.91 208,821,164.95 16,063,166.53
395 Laboratory Equipment 57,333.00 (71,119.75) 16,856,435.12 70,623.00 (214,910.18) 16,712,147.94 48,874.00 (13,762.73) 16,747,259.21 216,995,372.89 16,691,951.76
396 Power Operated Equipment 4,193.00 (1,098.15) 31,498,332.65 2,057.00 (538.73) 31,499,850.92 22,344.00 (5,851.90) 31.516,343.02 409,214.415.43 31,478,031.96
397 Communication Equipment 1,435,583.28 (161,498.78) 86,099,668.59 460,698.59 (214,395.87) 86,345,971.31 4,352,835.27 (768,278.37) 89,930,528.21 1,092,980,346.44 84,075,411.26
398 Miscellaneous Equipment 120,713.00 0.00 11,628,453.97 126,942.00 (100,596.00) 11,654,799.97 146,244.00 (318,332.49) 11,482,711.48 146,664,143.16 11,281,867.17
TOTAL GENERAL EQUIPMENT PLANT 4,868,260.28 1,395,902.15 562,854,811.71 3,580,674.59 1,340,060.65 565,095,425.66 16,785,986.27 5,814,369.59 576,067,042.33 7,180,971,504.93 552,382,423.46
SUBTOTAL W/O ARO 52,464,867.48 6,741,405.13 7,065,266,580.13 44,953,187.19 10,634,172.10 7,099,585,595.21 107,404,558.24 22,799,864.75 7,184,190,288.70 89,009,137,366.44 6,846,856,720.50 0.00 0.00
317 Asset Retire Cost Steam Prod 0.00 0.00 39,919,735.75 0.00 0.00 39,919,735.75 0.00 0.00 39,919,735.75 518,956,564.75 39,919,735.75
374 Asset Retirement Cost-Dist Pit 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
TOTAL ASSET RETIREMENT OBLIGATIONS 0.00 0.00 39,919,735.75 0.00 0.00 39,919,735.75 1 0.00 0.00 39,919,735.75 518,956,564.75 39,919,735.75
TOTAL ELECTRIC PLANT IN SERVICE 52,464,867.48 6,741,405,13 7,105,186,315.88 44,953,187.19 10,634,172,10 7,139,505,330.96 1 107,404,558.24 22,799,864.75 7,224,110,024.46 89,528,093,931.19 6,886,776,456.25
M.Larkin Workpaper
Case No. IPC-E-24-07
LARKIN Workpaper 3-Incremental Plant Determination.xlsx Page 6 of 14
Elec Plant In Service Incremental Plant Determination

Idaho Power Company
2024 Test Year
Forecasted Capital Closings(Project Type 21 Removed)
Attorney Work Product-Prepared at the direction of Idaho Power Legal
Source:Charles Peterson,Budget Application Analyst
Total
2024 Forecast • -.• w/o January
PROJ TYPE PROJ_DESCRIPTION 1 2 3 4 5 6 7 8 9 10 11 12 Total
11 11-Gen.Plant&Other Intangibles 15,735 218,171 649,580 264,561 121,172 775,687 58,615 158,907 335,663 66,919 187,532 958,677 3,811,219 3,811,217 3,795,484
12 12-Cogeneration-Transm.Station -9,330 0 20 4 3,964 3,286 0 51 105 1656 0 243 0 0 9,329
13 13-Cogeneration-Transm.Lines 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
15 15-Cogeneration-Distribution Lines 2 0 0 0 0 0 0 0 0 0 0 0 2 2 0
17 17-Interconnection Fac-Dist Stations 3181 15 194 10 62 35 141 0 17 0 0 104 3,760 3,760 578
21 21-Thermal Production 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
23 23-Hydro Production 11,2631 1,885,322 4,828,863 3,416,441 6,528,6231 4,842,062 3,577,442 1,064,334 1,788,1261 524,760 2,175,741 9,929,332 40,572,3101 40,572,310 40,561,046
24 24-Other Production -4,616,307 63,850 1,525,939 271,903 232,129 4,310,462 1,127,990 391,361 193,469 172,191 445,872 4,325,683 8,444,544 8,444,544 13,060,849
25 25-Relicensing 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
26 26-Hydro License Compliance 29,731 1,547,512 1,016,324 83,287 517598 969,588 1,061,173 285,412 366,321 2,549,323 1,356,833 4,627,965 14,411,067 14,411,067 14,381,336
30 30-Station Load Control 10,714 8,818 183,593 40,005 35,492 7,037 40,162 93,185 128,466 44,465 31,287 416,540 1,039,765 1,039,765 1,029,050
31 31-Step Up Stations 28,277 44,123 386,981 93,158 38,007 851,561 62,611 8538 39,484 2811 1,454,367 798,036 3,807,954 3,807,954 3,779,677
32 32-Transmission Station 6,493,514 374,548 1,662,319 808,017 835,724 1,601,222 0 798,245 2,322,179 1,838,708 3,920,782 7,709,149 28,364,408 28,364,408 21,870,893
33 33-Transmission Lines 1,795,552 1,733,342 5,714,475 2,940,849 1,206,024 6,691,909 886,722 1,712,245 1,320,013 3,479,809 4,858,867 10,583,293 42,923,102 42,923,102 41,127,548
40 40-Underground Reconstruction 1,492,3961 1,820,191 3,042,330 2,250,875 2,922,1341 5,022,995 2,140,966 3,595,362 6,529,503 4,960,957 4,388,988 6,018,063 44,184,761 44,184,761 42,692,364
41 41-Distribution Stations -553,936 2,711,517 4,478,493 3,374,529 3,966,3861 12,940,518 3,516,404 1,129,518 2,994,850 3,426,526 3,458,744 7,083,208 48,526,757 48,526,757 49,080,693
42 42-Overhead New Business -1,267,254 668,085 1,362,632 183,506 1,498,453 2,547,874 0 783,734 1,752,516 0 974,911 2,571,710 11,076,167 11,076,167 12,343,421
43 43-Overhead Reconstruction 4,330,587 4,527,469 9,104,782 4,797,908 5,988,326 13,117,868 3,286,959 6,661,381 8,824,727 3,456,328 4,409,812 11,680,999 80,187,146 80,187,146 75,856,559
44 44-Underground Duct Vault 35 0 0 0 0 0 0 3 1 0 0 1 41 41 5
45 45-Underground New Business -1,176,709 58,287 183,102 0 43,292 205,010 0 60,385 236,594 0 111,906 278,133 0 0 1,176,709
46 46-Ni ht uardLighting 6,054 156 1411 90 117 74 781 71 55 84 117 118 7,155 7,155 1,101
47 47-Street Lighting 88,137 709 2,999 138 458 4,701 0 2,720 9561 904 1,371 1,078 104,172 104,172 16,034
48 48-Transformer Purchases 01 0 0 0 0 0 0 0 01 0 0 0 0 0 0
49 49-Meter Purchases 574,419 868,489 968,474 827,1651 843,186 710,559 875,792 927,501 869,300 877,883 817,684 823,006 9,983,458 9,983,458 9,409,039
51 51-General Plant Lands&Building 844,567 1,049,230 1,796,464 928,6271 265,988 1,116,168 524,397 174,427 651,712 612,285 374,312 3,522,973 11,861,150 11,861,150 11,016,583
52 52-General Plant-Office Furniture 327 59,219 4,871 63,149 0 88,782 7,544 60,970 24,535 69,850 17,143 243,684 640,074 640,074 639,747
53 53-Transportation Equipment 1,351,043 1,981,137 3,118,366 2,138,723 578,369 1,640,856 1,747,349 1,931,541 1,819,560 2,005,475 1,569,286 6,024,720 25,906,425 25,906,425 24,555,382
54 54-General Plant-Stores Equipment -130059 112,319 453,097 139,597 8,748 5,457 0 32,731 91,917 21739 28,227 487,829 1,251,603 1,251,603 1,381,661
55 55-Shop/Garage Tools&Equipment 50,897 65,214 59,587 53,896 37,820 95,697 45,955 71,553 36,458 68,543 27,391 518,298 1,131,309 1,131,309 1,080,412
56 56-General Plant-Laboratory Equip 159 89,270 86,447 110,109 22,146 45,135 25,741 10,247 127,826 57,333 70,623 48,874 693,910 693,910 693,751
57 57-Power Operated Equipment 320,657 3,786 795 10,921 2,773 5,938 77 1,541 3,914 4,193 2,057 22,344 378,996 378,996 58,339
58 58-Data&Word Processing Equip. 140,760 659,491 816,849 526,281 483,355 1,414,469 615,548 696,072 958,520 460,287 898,075 1,415,309 9,085,011 9,085,011 8,944,251
59 59-Gen.Plant-Other Office Equip. 0 3,266 15,982 416 0 0 1,471 5,249 5,764 12,259 5,920 2,876 53,201 53,201 53,203
61 61-Communication Lines 0 0 1191 0 0 0 0 0 0 0 0 0 1191 1,191 1,191
62 62-Gen.Plant-Communication Equip 31,287 184,286 473,916 174,131 946,698 160,985 231,864 117,375 645,168 1,259,948 280,741 3,984,712 8,491,111 8,491,111 8,459,824
70 70-General Plant-Misc.Equipment 85,615 82,656 77,760 13,902 41,611 427,820 64,266 65,185 76,900 120,713 126,942 146,2441 1,329,614 1,329,614 1,243,999
TOTAL 9,951,314 20,820,4781 42,016,566 23,512,198 27,168,650 59,603,7551 19,899,2671 20,839,8441 32,144,619 26,095,9491 31,995,5311 84,223,2011 398,271,383 398,271,381 388,320,058
Land Purchases(Gold Dust&Artesian) 198,200.00 500,000 698,200
Sawmill(Acct 105 balance) 618,477 618,477
Total with Land 21,438,955 42,214,766 26,595,949 389,636,735
Difference in February,March&October
due to land purchases/adjustments
M.Larkin Workpaper
Case No.IPC-E-24-07
\\fillmore\RegAdmin\2024 Idaho General Rate Case\Workpapers\Larkin\LARKIN Workpaper 3-Incremental Plant Determination.xlsx Page 7 of 14
Capital WO Closings<$8M Incremental Plant Determination

Closings to Plant Allocation%
By Project Type and Plant Account
2024
Januaryr
March April May June July August September October November December Total
s ima a rojecestimatedProjects ima a rofee s 1ma a rojecEstimatedrofee s ima a rofeeEstimatedProjects ima a rofee s ima a rofee s ima a rofee s ima a rofee
Proj Plant 5 Year Actual 5 Year Closing$ Type Closings byy Type Closings by Type Closings by Type Closings by Estimated Project Type Type Closings by Type Closings by Type Closings by Type Closings by Type Closings by Type Closings by Type Closings by
Type Descr Account Descr Closing$ Percentage Account Account Account Account Closings by Account Account Account Account Account Account Account Account
11 Gen.Plant&Other Intangibles 303 Miscellaneous Intangible Plant 44,801,201.72 100.00% 0.0000 649,580.00 264,561.00 121,172.00 775,687.00 58,615.00 158,907.00 335,663.00 66,919.00 187,532.00 958,677.00 3,795,484.00
Project Type Total 44,801,201.72 100.00% .00 649,580.00 264,561.00 121,172.00 775,687.00 58,615.00 158,907.00 335,663.00 66,919.00 187,532.00 958,677.00 3,795,484.00
12 Cogeneration-Transm.Station 353 Meters 74,976.56 100.00% 0.00 .00 20.00 4.00 3,964.00 3,286.00 0.00 51.00 105.00 1,656.00 0.00 243.00 9,329.00
ProjectT pe Total 74,976.56 100.00% .00 20.00 4.00= 3,964.00 3,286.00 0.00 51.00 105.00 1,656.00 0.00 243.00 9,329.00
13 Co eneration-Transm.Lines 355 Poles and Fixtures 0.00 0.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
13 Co eneration-Transm.Lines 356 Overhead Conductors,Devices 0.00 0.00% 0.00 0.00 1 0.00 0.00 0.00 0.00 1 0.00 1 0.00 0.00 0.00 0.00 0.00 1 0.00
Project Type Total 0.00 0.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
15 Cogeneration-Distrib.Lines 37000 Meters 333,836.63 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 333,836.63 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
17 Interconnect Fee-Dist Stat 362 Station Equipment 140,515.10 100.00% 0.00 15.00 194.00 10.00 62.00 35.00 141.00 0.00 17.00 0.00 0.00 104.00 578.00
Project Type Total 140,515.10 100.00% 15.00 194.00 10.00! 62.00 35.00 141.00 0.00 17.00 0.00 0.00 104.00 578.00
21 Thermal Production 310 Land and Land Rights 0.00 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1 0.00 0.00 0.00 0.00
Project Type Total 0.00 100.00% 1110 li 0.00
21 Thermal Production 311 Structures and Improvements 2,695,998.76 1.71% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
21 Thermal Production 312 Boiler Plant Equipment 141,578,430.24 89.98% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
21 Thermal Production 314 Turbogenerator Units 7,337,042.98 4.66% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
21 Thermal Production 315 Accessoryelectric Equipment 1,965,508.20 1.25% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
21 Thermal Production 316 Misc Povrer Plant Equipment 3,614,344.41 2.30% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
21 Thermal Production 353 Station Equipment 146,433.46 0.09% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 157,337,758.05 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
23 Hydro Production 330 Land and Land Rights 0.00 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 0.00 100.00% 0.00
23 H dro Production 331 Structures and Improvements 24,933,924.30 12.34% 0.00 232,684.91 595,974.34 421,654.37 805,757.34 597,603.35 441,524.98 131,359.24 220,689.06 64,765.45 268,528.18 1,225,470.07 5,006,011.28
23 Hdro Production 332 Reservoirs,Dams,Wateivas 22,593,184.65 11.18% 0.00 210,840.98 540,025.64 382,070.42 730,114.68 541,501.72 400,075.63 119,027.53 199,971.27 58,685.42 243,319.37 1,110,425.75 4,536,058.41
23 H dro Production 333 Waterwheel,Turbines,Generato 132,684,238.67 65.68% 0.00 1,238,217.43 3,171,438.26 2,243,805.99 4,287,784.68 3,180,106.93 2,349,546.15 699,019.54 1,174,382.30 344,645.09 1,428:955.07 6,521,258.41 26,639,159.85
23 H droProduction 334 Accessory Electric Equipment 12,024,121.85 5.95% 0.00 112,209.84 287,402.34 203,338.37 388:567.97 288,187.91 212,920.76 63,346.61 106,424.97 31,232.46 129,494.88 590,970.01 2,414,096.11
23 H dro Production 335 Misc Power Plant Equipment 6,881,882.21 3.41% 0.00 64,222.15 164,491.76 116,378.62 222,392.87 164,941.38 121,863.00 36,255.78 60,911.23 17,875.57 74,115.06 338,235.59 1,381,683.02
23 H dro Production 336 Roads,Railroads&Bridges 2,908,971.20 1.44% 0.00 27,146.70 69,530.66 49,193.24 94,005.45 69,720.71 51,511.48 15,325.31 25,747.17 7,556.00 31,328.43 142,972.17 584,037.33
Project T pe Total 202,026,322.88 100.00% IN 1,885,322.00 4,828,863.00 3,416,441.00 6,528,623.00 4,842,062.00 3,577,442.00 1,064,334.00 1,788,126.00 524,760.00 2,175,741.00 9,929,332.00 40,561,046.00
24 Other Production 340 Land and Land Rights 0.00 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 0.00 100.00% 0.00
24 Other Production 341 Structures and Improvements 10,960,005.55 18.22% 0.00 11,631.56 277,980.43 49,532.59 42,286.96 785,237.20 205,486.03 71,294.26 35,244.26 31,368.05 81,224.54 788,010.01 2,379295.88
24 Other Production 342 Fuel Holders,Producers,Acces 177,298.11 0.29% 0.00 188.16 4,496.84 801.28 684.07 12,702.65 3,324.11 1,153.31 570.14 507.44 1,313.96 12,747.50 38:489.46
24 Other Production 343 Prime Movers 45,570,898.36 75.74% 0.00 48,363.17 1,155,822.20 205,952.87 175,826.07 3,264,958.61 854,395.81 296,436.31 146,543.06 130,426.04 337,725.66 3,276,487.75 9,892,937.56
24 Other Production 344 Generators 166,603.68 0.28% 0.00 176.81 4,225.60 752.95 642.81 11,936.44 3,123.60 1,083.75 535.75 476.83 1,234.70 11,978.59 36,167.81
24 Other Production 345 Accessory Electric Equipment 1,861,324.52 3.09% 0.00 1,975.37 47,209.08 8,412.06 7,181.54 133,355.89 1 1,897.44 12,107.82 5,985.49 5,327.20 13,794.27 133,826.79 404,072.95
24 Other Production 346 Misc Power Plant Equipment 1,427,458.09 2.37% 0.00 1,514.92 36,204.85 6,451.25 5,507.56 102,271.22 26,763.01 9,285.54 4,590.30 4,085.45 10,578.88 102,632.36 309,885.35
Project Type Total 60,163,588.31 100.00% 63,850.00 1,525,939.00 271,903.00 232,129.00 4,310,462.00 1,127,990.00 391,361.00 193,469.00 172,191.00 445,872.00 4,325,683.00 13,060,849.00
24 Other Production 363 Storage Battery Equipment 0.00 100.00%
Project Type Total 0.00 100.00
25 Relicensing 302 Franchises and Consents 0.00 100000% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 0.00 100.00% 0.00 , 0.00 0.00 0.00 0a 0.00 0.00 0.00 0.00 0.00 0.00
26 Compliance&Mitigation 330 Land and Land Rights 0.00 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 0.00 100.00% 0.00
26 Compliance&Mitigation 302 Franchises and Consents 20,136,638.08 33.70% 0.00 521,465.22 342,470.77 28,065.23 174,415.03 326,722.13 357,583.54 96,175.30 123,439.21 859,045.54 457,212.11 1,559,485.68 4,846,079.76
26 Compliance&Mitigation 331 Structures and Improvements 37,502,136.70 62.76% 0.00 971,168.08 637,811.81 52,268.21 324,827.63 608,481.82 665,957.58 179,115.27 2252891.12 1,599,872.00 851,504.15 2,904,3%991 9,025,257.58
26 Compliance&Miti Mitigation 332 Reservoirs,Dams,Waterways 884,177.44 1.48% 0.00 22,896.96 15,037.51 1,232.31 7,658.37 14,346.01 15,701.10 4,222.95 5,420.08 37,719.74 2Q075.68 68,475.29 212,785.99
26 Compliance&Mitigation 335 Misc Power Plant Equipment 294,172.38 0.49% 0.00 7,617.99 5,003.09 410.00 2,548.00 4,773.02 5,223.87 1,405.01 1,803.30 12,549.64 6,679.33 22,782.23 70,795.47
26 Compliance&Mitigation 336 Roads,Railroads&Bridges 940,818.46 1.57% 0.00 24,363.75 16,000.82 1,311.26 8,148.97 15,265.02 16,706.92 4,493.48 5,767.29 40,136.09 21,361.74 72,861.86 226,417.20
Project Type Total 59,757,943.06 100.00% 1,547,512.00 1,016,324.00 83,287.00 517,598.00 969,588.00 1,061,173.00 285,412.00 366,321.00 2,549,323.00 1,356,833.00 4,627,965.00 14,381,336.00
30 Station Load Control 3501X Land Owned in Fee-TS 0.00 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 0.00 100.00% 0.00
30 Station Load Control 353 Station Equipment 2,025,945.37 100.00% 0.00 8,818.00 183,593.00 40,005.00 35,492.00 7,037.00 40,162.00 93,185.00 128,466.00 44,465.00 31,287.00 416,540.00 1,029,050.00
Project Type Total 2,025,945.37 100.00% 8,818.00 183,593.00 40,005.00 35,492.00 7,037.00 40,162.00 93,185.00 128,466.00 44:465.00 31:287.00 416,540.00 1,029,050.00
31 Step Up Stations 352 Structures and Improvements 255,072.28 4.09% 0.00 1,802.49 15,808.72 1 3,805.64 1 1,552.64 34,787.48 1 2,557.75 1 348.79 1,612.98 1 114.83 1 59,412.96 32,600.90 1 154,405.17
31 Step Up Stations 353 Station Equipment 5,988,830.14 95.91% 0.00 42,320.51 371,172.28 89,352.36 36,454.36 816,773.52 60,053.25 8,189.21 37,871.02 2,696.17 1,394,954.04 765,435.10 3,625,271.83
Project Type Total 6,243,902.42 100.00% 44,123.00 386,981.00 93,158.00 38,007.00 851,561.00 62,611.00 8,538.00 39,484.00 2,811.00 1,454,367.00 798,036.00 3,779,677.00
32 Transmission Station 3501X Land Owned in Fee-TS 0.00 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 0.00 100.00% 0.00
32 Transmission Station 352 Structures and Improvements 7,974,502.98 11.21% 0.00 42,003.67 186,420.68 90,615.03 93,722.23 179,568.96 0.00 89,519.15 260,420.65 206,201.82 439,695.90 864,542.13 2,452,710.21
32 Transmission Station 353 Station Equipment 63,042,404.64 88.66% 0.00 332,059.84 1,473,748.03 1 716,356.77 1 740,920.73 1,419,581.78 0.00 1 707,693.29 2,058,754.50 1,630,127.73 3,476,014.38 6,834,634.72 19,389,891.77
32 Transmission Station 397 Communication Equipment 91,982.67 0.139% 0.00 484.50 2,150.29 1,045.21 1,081.05 2,071.26 0.00 1,032.57 3,003.85 2,378.45 5,071.71 9,972.14 28,291.02
Project Type Total 71,108,890.29 100.00% 374,548.00 1,662,319.00 808,017.00 835,724.00 1,601,222.00 0.00 798,245.00 2,322,179.00 1,838,708.00 3,920,782.00 7,709,149.00 21,870,893.00
33 Transmission Lines 3501X Land Owned in Fee-TL 0.00 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 0.00 100.00% 0.00
33 Transmission Lines 35020 Land Ri hts and Easements 3,286,924.81 2.27% 0.00 39,300.09 129,564.36 66,677.91 27,344.20 151,725.74 20,104.66 38,821.75 29,928.67 78,897.75 110,165.15 239,955.14 932,485.42
33 Transmission Lines 35022 Transin ROW Renewal Cost 138,105.43 0.10% 0.00 1,651.26 5,443.86 2,801.58 1,148.91 6,375.00 844.73 1,631.16 1,257.50 3IN 2 4,628.77 10,082.10 39,179.87
33 Transmission Lines 354 Towers and Fixtures 40,844,332.14 28.17% 0.00 488,354.87 1,610,006.39 828,560.05 339,787.35 1,885,390.39 249,826.64 482,410.96 371,902.82 980%7.60 1,368,945.86 2,981,755.86 11,587,348.78
33 Transmission Lines 355 Poles and Fixtures 54,630,914.51 37.68% 0.00 653,194.01 2,153,447.41 1,108,231.93 454,479.07 2,521,784.43 334,153.04 645,243.80 497,434.77 1,311,334.06 1,831,019.39 3,988,216.75 15,498,538.66
33 Transmission Lines 356 Overhead Conductors,Devices 46,070,523.82 31.78% 550,841.78 1,816,012.99 934,577.54 383,264.47 2,126,633.44 281,792.93 544,137.33 419,489.24 1,105,854.58 1,544,107.83 3,363,283.16 13,069,995.27
Project Type Total 144,970,800.71 100.00% mli 1,733,342.00 5,714,475.00 2,940,849.00 1,206,024.00 6,691,909.00 886,722.00 1,712,245.00 1,320,013.00 3,479,809.00 4,858,867.00 10,583,293.00 41,127,548.00
M.Larkin Workpaper
Case No.IPC-E-24-07
LARKIN Workpaper 3-Incremental Plant Determination.xlsx Page 8 of 14
Closings to Pit c$8M Incremental Plant Determination

Closings to Plant Allocation%
By Project Type and Plant Account
2024
January February March April May June July August September October November December Total
Estimated Project Estimated Project Estimated Projeet Estimatetl Project Estimated Project Estimatetl Project Estimated Project Estimated Project Estimated Project Estimatetl Project Estimated Project Estimated Project
Proj Plant 5 Year Actual 5 Year Closing$ Type Closings by Type Closings by Type Closings by Type Closin s b
g y Type Closings by Estimated Project Type Type Closings by Type Closings by Type Closings by Type Closings by Type Closings by Type Closings by Type Closings by
Type Descr Account Descr Closing$ Percentage Account Account Account Account Account Closings by Account Account Account Account Account Account Account Account
40 Underground Reconstruction 366 Underground Conduit 15,731,958.08 12.57% 0.00 228,827.23 382,469.71 282,971.12 367,359.15 631,471.10 269,153.79 451,994.71 820,863.34 623,671.93 551,766.24 756,567.12 5,367,115.43
40 Underground Reconstmction 367 Underground Conductors,Device 94,407,14100 75.44% 0.00 1,373,187.24 2,295,192.51 1,698,103.57 2,204,514.32 3,789,444.43 1,615,186.10 2,712,410.53 4,925,983.16 3,742,641.77 3,311,137.31 4,540,142.95 32,207,943.89
40 Underground Reconstruction 368 Line Transformers 13,884,655:25 11.10% 0.00 221,957.51 337,558.75 249,743.64 324,222.52 557,321.50 237,548.79 398,919.88 724,474.62 550,438.14 486,975.87 667,728.30 4,736,889.52
40 Under round Reconstmction 369 Services 903,469.20 0.72% 0.00 13,141.30 21,964.82 16,250.72 21,097.04 36,264.70 15,457.21 25,957.56 47,141.29 35,816.80 31,687.33 43,448.82 308,227.59
40 Underground
Reconstmction 37000 Meters 211,434.66 0.17% 0.00 3,075.40 5,140.32 3,803.08 4,937.24 8,486.86 3,617.38 6,074.73 11,032.25 8,382.04 7,415.64 10,168.12 72,133.06
40 Underground Reconstruction 37010 Meters-AMI 159.78 0.00% 0.00 2.32 3.88 2.87 3.73 6.41 2.73 4.59 8.34 6.33 5.60 7.68 54.51
Project Type Total 125,138,817.97 100.00% 1,820,191.00 3,042,330.00 2,250,875.00 2,922,134.00 5,022,995.00 2,140,966.00 3,595,362.00 6,529,503.00 4,960,957.00 4,388,988.00 6,018,063.00 42,692,364.00
41 Distribution Stations 360 Land and Land Ri hts 0.00 100.00% 0.00 618,477.00 198,200.00 0.00 0.00 0.00 0.00 0.00 0.00 500,000.00 0.00 0.00 1,316,677.00
Project T pe Total 0.00 100.00% 618,477.00 198,200.00 _ 500,000.00 1,316,677:00
41 Distribution Stations 361 Structures and improvements 13,639,588.92 17.58% 0.00 476,720.37 787,378.00 593,286.60 697,342.85 2,275,113.34 618,230.09 198,584.13 526,534.04 602,428.36 608,092.71 1,245,321.17 8,629,031.64
41 Distribution Stations 362 Station Equipment 60,017,724:20 77.36% 0.00 2,097,693.10 3,464,667.14 2,610,614.72 3,068,489.16 10,011,087.99 2,720,372.54 873,821.60 2,316,886.15 2,65Q840.82 2,675,765.42 5,479,735.71 37,969,974.33
41 Distribution Stations 397 Communication Equipment 3,922,710.26 5.06% 0.00 137,103.54 226,447.86 170,627.68 200,553.99 654,316.67 177,801.36 57,112.28 151,429.82 173,256.83 174,885:88 358,151.13 2,481,687.03
Project Type Total 77,580,023.38 100.00% 2,711,517.00 4,478,493.00 3,374,529.00 3,966,386.00 12,940,518.00 3,516,404.00 1,129,518.00 2,994,850.00 3,426,526.00 3,458:744.00 7,083,208.00 49,080,693:00
42 Overhead New Business 364 Poles,Towers and Fixtures 0.00 0.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
42 Overhead New Business 365 Overhead Conductors,Devices 1,700,797.65 4.92% 0.00 32,875.80 67,053.76 9,030.15 73,737.38 125,378.33 0.00 38,566.77 86,239.56 0.00 47,974.40 126,551.28 607,407.42
42 Overhead New Business 368 Line Transformers 31,871,298.98 92.21% 0.00 616,060.54 1,256,522.45 169,216.20 1,381,766.93 2,349,468.44 0.00 722,703.83 1,616,045.78 0.00 898,993.68 2,371,448.30 11,382,226.13
42 Overhead New Business 369 Services 0.00 0.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
42 Overhead New Business 37000 Meters 987,896.24 2.86% 0.00 19,095.67 38,947.70 5,245.10 42,829.83 72,825.12 0.00 22,401.23 50,091.64 0.00 27,865.59 73,506.41 352,808.29
42 Overhead New Business 37010 Meters-AMI 2,741.74 0.01% 0.00 53.00 108.09 14.56 11887 20211 0.00 6217 13902 0.00 7734 204.00 979.16
Project Type Total 34,562,734.61 100.00% 668,085.00 1,362,632.00 183,506.00 1,498,45100 2,547,874:00 0.00 783,734:00 1,752,516:00 0.00 974,911:00 2,571,710.00 12,343,421.00
43 Overhead Reconstruction 364 Poles,Towers and Fixtures 74,581,75694 42.06% 0.00 1,904,350.12 3,829,665.69 2,018,102.54 2,518,817.76 5,517,655.33 1,382,565.13 2,801,919.06 3,711,868.58 1,453,805.35 1,854,861.07 4,913,277.56 31,906,888.18
43 Overhead Reconstruction 365 Overhead Conductors,Devices 30,546,379:54 17.23% 0.00 779,962.87 1,568,512.55 826,552.34 1,031,629.80 2,259,860.87 566,255.89 1,147,579.34 1,520,266.50 595,433.68 759,693.69 2,012,326.43 13,068,073.97
43 Overhead Reconstruction 368 Line Transformers 69,011,545.38 38.92% 0.00 1,762,121.86 3,543,643.35 1,867,378.57 2,330,697.39 5,105,563.84 1,279,306.90 2,592,654.99 3,434,644.04 1,345:226:47 1,716,328.96 4,546,324.61 29,523,890.99
43 Overhead Reconstruction 369 Services 2:118:901:13 1.20% 0.00 54,103.44 108,802.52 57,335.20 71,560.74 156,759.06 39,279.29 79,603.78 105,455.85 41,303.26 52,697.43 139,588% 906,488.99
43 Overhead Reconstruction 37000 Meters 1,054,388.46 0.59% 0.00 26,922.47 54,141.33 28,530.62 35,609.41 78,005.03 19,545.81 39,611.71 52,475.99 20,552.96 26,222.82 69,460.73 451,078.87
43 Overhead Reconstruction 37010 Meters-AMI 322.59 0.00% 0.00 8.24 16.56 8.73 10.89 23.87 598 1212 1606 629 802 21.25 1 138.01
Project Type Total 177,313,294.04 100.00% 4,527,469.00 9,104,782.00 4,797,908.00 5,988,326.00 13,117,868.00 3,286,959:00 6,661,381:00 8,824,727:00 3,456,328:00 4,409,812:00 11,680,999.00 75,856,559.00
44 Underground Duct Vault 366 Underground Conduit 3,051,512.55 37.19% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.12 0.37 0.00 0.00 0.37 1.86
44 Underground Duct Vault 367 Unde round Conductors,Device 4,160,774.53 50.71% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.52 0.51 0.00 0.00 0.51 2.54
44 Underground Duct Vault 368 Line Transformers 899,065.68 10.96% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.33 0.11 0.00 0.00 0.11 0.55
44 Underground Duct Vault 369 Services 15:705:66 0.19% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.01
44 Underground Duct Vault 37000 Meters 77,935.75 0.95% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.01 0.00 0.00 0.01 0.65
Project Type Total 8,204,994.17 100.00% 0.00 0.00 0.00 0.00 0.00 3.00 1.00 0.00 0.00 1.00 5.00
45 Underground New Business 366 Underground Conduit 0.00 0.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
45 Underground New Business 367 Underground Conductors,Device 0.00 0.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
45 Underground New Business 368 Line Transformers 90 585 065.72 88.84% 0.0 551,783.99 162,673.52 0.00 38,461.96 182,137.27 0.00 53,647.92 210,197.48 0.00 99,420.78 247,102.02 1,045,424.93
45 Underground New Business 369 Services 8,616,624.56 8.45% 0.00 4,925.79 15,473.82 0.00 3,658.58 17,325.25 0.00 5,103.09 19,994.39 0.00 9,457.09 23,504.82 99,442.82
45 Underground New Business 37000 Meters 2,756,772.29 2.70% 0.00 1,575.94 4,950.64 0.00 1,170.51 5,542.98 0.00 1,632.67 6,396.93 0.00 3,025.67 7,520.05 31,815.38
45 Underground New Business 37010 Meters-AMI 2,241.64 0.00% 0.00 1.28 4.03 0.00 0.95 4.51 0.00 1.33 5.20 0.00 2.46 6.11 25.87
Project Type Total 101,960,704.21 100.00% 58,287.00 183,102.00 0.00 43,292.00 205,010.00 0.00 60,385.00 236,594.00 0.00 111,906.00 278,133.00 1,176,709.00
46 Ni ht uard Lighting 371 Installations,CustPromises 2,432,619.32 100.00% 0.00 156.00 141.00 90.00 117.00 74.00 78.00 71.00 55.00 84.00 117.00 118.00 1,101.00
Project Type Total 2,432,619.32 100.00% 156.00 141.00 90.00 � 117.00 74.00 78.00 71.00 55.00 84.00 117.00 118.00 1,101.00
47 Street Lighting 364 Poles,Towers and Fixtures 223,783.27 5.24% 0.00 37.15 157.15 7.23 24.00 246.33 0.00 142.53 50.09 47.37 71.84 56.49 840.18
47 Street Lighting 373 Street Lighting,Signal System 4,046,886.98 94.76% 0.00 671.85 2,841.85 130.77 434.00 4,454.67 0.00 2,577.47 905.91 856.63 1:219.16 1,021.51 15,193.82
Project Type Total 4,270,670.25 100.00% 709.00 2,999.00 138.00 _ 458.00 4:701:00 0.00 2,720.00 956.00 904.00 1,371.00 1,078.00 16,034.00
49 Meter Purchases 37000 Meters 991,298.23 2.67% 0.00 23,165.61 25,832.55 22,063.35 22,490.69 18,953.07 23,360.40 24,739.66 23,187.24 23,416.18 21,810.46 21,952.42 250,971.62
49 Meter Purchases 37010 Meters-AMI 36,172,918.44 97.33% 0.00 845,323.36 942,641.45 805,101.65 820,695.31 691,605.93 852,431.60 902,761.34 846,112.76 854,466.82 795,873.54 801,053.58 9,158,067.38
Project Type Total 37,164,216.67 100.00% 868,489.00 968,474.00 827,165.00 843:186.00 710,559.00 875,792.00 927,501.00 869,300.00 877,883.00 817,684.00 823,006.00 9,409,039.00
51 General Plant Lands&Buildings 389 Structures and Improvements 0.00 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 0.00 100.00% 0.00 0.00
51 General Plant Lands&Building 390 Structures and Improvements 33,214,472.11 100.00% 0.00 1,049,230.00 1,796,464.00 928,627.00 265,988.00 1,116,168.00 524,397.00 174,427.00 651,712.00 612,285.00 374,312.00 3,522,973.00 11,016,583.00
Project Type Total 33,214,472.11 100.00% 1,049,230.00 1,796,464.00 928,627.00= 265,988.00 1,116,168.00 524,397.00 174,427.00 651,712.00 612,285.00 374,312.00 3,522,973.00 11,016,583.00
52 General Plant-Office Furniture 391 Office Furniture,Equipment 1,807,451.49 100.00% 0.00 59,219.00 4,871.00 63,149.00 0.00 88,782.00 7,544.00 60,970.00 24,535.00 69,850.00 17,143.00 243,684.00 639,747.00
Project Type Total 1,807,451.49 100.00% 59,219.00 4,871.00 63,149.00 0.00 88,782.00 7,544.00 60,970.00 24,535.00 69,850.00 17,143.00 243,684.00 639,747.00
53 Transportation Equipment 392 Transportation Equipment 62,680,967.37 100.00% 0.00 1,981,137.00 3,118,366.00 2,138,723.00 578,369.00 1,640,856.00 1,747,349.00 1,931,541.00 1,819,560.00 2,005,475.00 1,569,286.00 6,024,720.00 24,555,382.00
Project Type Total 62,680,967.37 100.00% 1,981,137.00 3,118,366.00 2,138,723.00 578,369.00 1,640,856.00 1,747,349.00 1,931,541.00 1,819,560.00 2,005,475.00 1,569,286.00 6,024,720.00 24,555,382.00
54 General Plant-Stores Equipment 393 Stores Equipment 2,443,581.26 100.00% 0.00 112,319.00 453,097.00 139,597.00 8,748.00 5,457.00 0.00 32,731.00 91,917.00 21,739.00 28,227.00 487,829.00 11381,661.00
Project Type Total 2,443,581.26 100.00% 112,319.00 453,097.00 139,597.00 8,748.00 5,457.00 0.00 32,731.00 91,917.00 21,739.00 28,227.00 487,829.00 1,381,661.00
55 Shop/Garage Tools&Equipment 394 Tools,Shop,Garage Equipment 6,049,719.45 100.00% 0.00 65,214.00 59,587.00 53,896.00 37,820.00 95,697.00 45,955.00 71,553.00 36,458.00 68,543.00 27,391.00 518,298.00 1,080,412.00
Project Type Total 6,049,719.45 100.00% 65,214.00 59,587.00 53,896.00 37,820.00 95,697.00 45,955.00 71,553.00 36,458.00 68,543.00 27,391.00 518,298.00 1,080,412.00
56 General Plant-Laboratory Equip 395 Laboratory Equipment 4,092,521.48 100.00% 0.00 89,270.00 86,447.00 110,109.00 22,146.00 45,135.00 25,741.00 10,247.00 127,826.00 57,333.00 70,623.00 48,874.00 693,751.00
Project Type Total 4,092,521.48 100.00% 89,270.00 86,447.00 110,109.00 22,146.00 45,135.00 25,741.00 10,247.00 127,826.00 57,333.00 70,623.00 48,874.00 693,751.00
57 Power Operated Equipment 396 Power Operated Equipment 14,875,422.63 100.00% 0.00 3,786.00 795.00 10,921.00 2,773.00 5,938.00 77.00 1,541.00 3,914.00 4,193.00 2,057.00 22,344.00 58,339.00
Project Type Total 14,875,422.63 100.00% 3,786.00 795.00 10,921.00 2,773.00 5,938.00 77.00 1,541.00 3,914.00 4,193.00 2,057.00 22,344.00 58,339.00
58 Data&Word Processing Equip. 391 Office Furniture,Equipment 29,181,591.53 100.00% 0.00 659,491.00 816,849.00 526,281.00 483,350.00 1,414,469.00 615,548.00 696,072.00 958,520.00 460,287.00 898,075.00 1,415,309.00 8,944,251.00
Project Type Total 29,181,591.53 100.00% 659,491.00 816,849.00 526,281.00 Jr 483,350.00 1,414,469.00 615,548.00 696,072.00 958,520.00 460,287.00 898,075.00 1,415,309.00 8,944,251.00
59 Gen.Plant-Other Office Equip. 391 Office Furniture,Equipment 160,777.06 100.00% 0.00 3,266.00 15,982.00 416.00 0.00 0.00 1,471.00 5,249.00 5,764.00 12,259.00 5,920.00 2,876.00 53,203.00
Project Type Total 160,777.06 100.00% 0.00 3,266.00 15,982.00 416.00 � 0.00 0.00 1,471.00 5,249.00 5,764.00 12,259.00 5,920.00 2,876.00 53,203.00
61 Communication Lines 397 Communication Equipment 228,837.44 100.00% 0.00 0.00 1,191.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1,191.00
Project Type Total 228,837.44 100.00% 0.00 0.00 1,191.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1,191.00
62 Gen.Plant-Communication Equip 397 Communication Equipment 15,023,875.68 100.00% 0.00 184,286.00 473,916.00 174,131.00 946,698.00 160,985.00 231,864.00 117,375.00 645,168.00 1,259,948.00 280,741.00 3,984,712.00 845982400
ProjectT Type Total 15,023,875.68 100.00% 184,286.00 473,916.00 174,131.00 946,698.00 160,985.00 231,864.00 117,375.00 645,168.00 1,259,948.00 280,741.00 3,984,712.00 8,459,824.00
M.Larkin Workpaper
Case No.IPC-E-24-07
LARKIN Workpaper 3-Incremental Plant Determination.xlsx Page 9 of 14
Closings to Pit<$8M Incremental Plant Determination

Closings to Plant Allocation
By Project Type and Plant Account
2024
January February March April May June July August September October November December Total
Estimated Project Estimated Project Estimated Project Estimatetl Project Estimated Project Estimatetl Project Estimated Project Estimated Project Estimated Project Estimatetl Project Estimated Project Estimated Project
Proj Plant 5 Year Actual 5 Year Closing$ Type Closings by Type Closings by Type Closings by Type Closin s b T
g y ype Closings by Estimated Project Type Type Closings by Type Closings by Type Closings by Type Closings by Type Closings by Type Closings by Type Closings by
Type Descr Account Descr Closing$ Percentage Account Account Account Account Account Closings by Account Account Account Account Account Account Account Account
70 General Plant-Misc.Equipment 398 Miscellaneous Equipment 5,065,118.85 100.00% 0.00 82,656.00 77,760.00 13,902.00 41,611.00 427,820.00 64,266.00 65,185.00 76,900.00 120,713.00 126,942.00 146,244.00 1,243,999.00
Project Type Total 5,065,118.85 100.00% 82,656.00 77,760.00 13,902.00 41,611.00 427,820.00 64,266.00 65,185.00 76,900.00 120,713.00 126,942.00 146,244.00 1,243,999.00
Total 1,492,438,092.07 0.00 21,438,955.00 42,214,766.00 23,512,198.00 27,168,650.00 59,603,755.00 19,899,267.00 20,839,844.00 32,144,619.00 26,595,949.00 31,995,531.00 84,223,201.00 389,636,735.00
added values for 2024 land urchases/adjustments
M.Larkin Workpaper
Case No.IPC-E-24-07
LARKIN Workpaper 3-Incremental Plant Determination.xlsx Page 10 of 14
Closings to Pit<$8M Incremental Plant Determination

Idaho Power Company
2024 Test Year
Forecasted Capital Closings(Project Type 21 Removed)
Attorney Work Product-Prepared at the direction of Idaho Power Legal
2024 ESTIMATED CLOSINGS(Gross Additions)TO PLANT FOR PROJECTS>$8M
Total Total Total Total Total Total Total Total Total Total
Projected Projected Projected Projected Projected Projected Projected Projected Projected Projected
Closing to Closing to Closing to Closing to Closing to Total Projected Closing to Closing to Closing to Closing to Closing to Total Projected
Plant Plant Plant Plant Plant Closing to Plant Plant Plant Plant Plant Plant Closing to Plant
Work Work Order In Service
Order Type Budget ID Title Type Date Land(Y/N) Jan-24 Feb-24 Mar-24 Apr-24 May-24 Jun-24 Jul-24 Aug-24 Sep-24 Oct-24 Nov-24 Dec-24 2024 Total Total w/o January
24 FRBS230001 FRBS(Franklin 60MW BESS)-2024 Peak Capacity Resource 24-Battery 6/1/2024 N 125,470,022 125,470,022 125,470,021.92
24 HMWY230003 HMWY(Hemingway 36MW BESS)-2024 Peak Capacity Resource 24-Battery 6/1/2024 N 68,794,901 68,794,901 68,794,900.51
24 BMSU220002 2023 Peak Capacity Resource(2021 All Source RFP)-40MW 24-Battery 3/31/2024 N 26,958,698 5,000,000 31,958,698 31,958,698.48
33 T423290001 T423-Rebuild Huntington-Quartz 138kV Transmission Line 33 10/31/2024 N 14,980,719 14,980,719 14,980,718.90
26 BLPR130013 Oxbow Fish Hatchery Renovation 26 9/30/2024 N 23,696,612 33,807 707,672 1,771,262 26,209,352 26,209,352.45
33 T902220002 T902 Rebuild RTSN-DRAM segment on the Boise Bench-DRAM-Midpoint#1230kV line(Phase 1) 33 12/31/2024 N 21,167,593 21,167,593 21,167,593.16
11 BOBN220002 GridMod Single Vendor Platform 11 10/31/2024 N 10,854,393 455,434 242,502 11,552,329 11,552,329.35
32 MPSN210001 Replace C506 Series Capacitor Bank at MPSN 32 1/25/2024 N 5,445,315.92 3,980,880.90 14,189.85 1,885,744.53 4,098.13 855.46 3,136.70 2,138.66 11,336,360 5,891,044.23
40 VAR11005 VARI Distribution Underground Work associated with new WDRI-KCHM Transmission Line 40 11/29/2024 N 11,794,550 11,794,550 11,794,549.85
Total 5,445,316 3,980,881 26,972,888 1,885,745 4,098 199,265,778 3,137 2,139 23,696,612 25,868,918 12,957,656 23,181,357 323,264,525 317,819,208.86
January
included in
actuals
27577662 8
27577670
IS date
1/25/24
M.Larkin Workpaper
Case No.IPC-E-24-07
\\fllmore\RegAdmin\2024 Idaho General Rate Case\Workpapem\Larkin\LARKIN Workpaper 3-Incremental Plant Determinatio-dsx Page 11 of 14
Capital WO Closing>$8M Incremental Plant Determination

Closings to Plant Allocation
By Project Type and Plant Account
2024
January February March Aril May June July August September October November December Total
Estimated Project Estimated Project Estimated Project Estimatetl Project Estimatetl Project Estimated Project Estimated Project Estimated Project Estimated Project Estimatetl Project Estimated Project Estimated Project
Proj Plant 5 Year Actual 5 Year Closing$ Type Closings by Type Closings by Type Closings by Type Closings by Type Closings by Estimated Project Type Type Closings by Type Closings by Type Closings by Type Closings by Type Closings by Type Closings by Type Closings by
Type Descr Account Descr Closing$ Percentage Account Account Account Account Account Closings by Account Account Account Account Account Account Account Account
11 Gen.Plant&Other Intangibles 303 Miscellaneous Intangible Plant 44,801,201.72 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 10,854,393.04 455,434.21 242,502.10 11,552,329.35
Project Type Total 44,801,201.72 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 10,854,393.04 455,434.21 242,502.10 11,552,329.35
12 Co eneralion-Transm.Station 353 Meters 74,976.56 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 74,976.56 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
13 Co eneralion-Transm.Lines 355 Poles and Fixtures 0.00 0.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
13 Co eneration-Transm.Lines 356 Overhead Conductors,Devices 0.00 0.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 0.00 0.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
15 Co eneration-Distrib.Lines 37000 Meters 333,836.63 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 333,836.63 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
17 Interconnect Fac-Dist Stat 362 Station Equipment 140,515.10 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 140,515.10 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
21 Thermal Production 310 Land and Land Rights 0.00 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 0.00 100.00% 0.00
21 Thermal Production 311 Structures and Improvements 2,695,998.76 1.71% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
21 Thermal Production 312 Boiler Plant Equipment 141,578,430.24 89.98% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
21 Thermal Production 314 Turbogenerator Units 7,337,042.98 4.66% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
21 Thermal Production 315 Accessory electric Equipment 1,965,508.20 1.25% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
21 Thermal Production 316 Misc Power Plant Equipment 3,614,344.41 2.30% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
21 Thermal Production 353 Station Equipment 146,433.46 0.09% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 157,337,758.05 100.00% 0.00 1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 �M0
23 Hydro Production 330 Land and Land Rights 0.00 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 0.00 100.00% 0
23 Hydro Production 331 Structures and Improvements 24,933,924.30 12.34% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
23 Hydro Production 332 Reservoirs,Dams,Waterways22,593,184.65 11.18% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
23 Hydro Production 333 Waterwheel,Turbines,Generato 132,684,238.67 65.68% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
23 Hydro Production 334 AccessoryElectric Equipment 12,024,121.85 5.95% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
23 Hydro Production 335 Misc Power Plant Equipment 6,881,882.21 3.41% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
23 Hydro Production 336 Roads,Railroads&Bridges 2,908,971.20 1.44% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 202,026,322.88 100.00% 0.00 0.00 w 0.00 0.00 0.00 0.00
24 Other Production 340 Land and Land Rights 0.00 100.00% 0.00 0.00 0.00to.
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 0.00 100.00% 0.00
24 Other Production 341 Structures and Improvements 10,960,005.55 18.22% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
24 Other Production 342 Fuel Holders,Producers,Acces 177,298.11 0.29% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
24 Other Production 343 Prime Movers 45,570,898.36 75.74% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
24 Other Production 344 Generators 166,603.68 0.28% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
24 Other Production 345 AccessoryElectric Equipment 1,861,324.52 3.09% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
24 Other Production 346 Misc Power Plant Equipment 1,427,458.09 2.37% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 60,163,588.31 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 7 0.00 0.00 0.00
24 Other Production 363 Storage Batte Equipment 0.00 100.00% 0.00 0.00 26,958,698.48 0.00 0.00 199,264,922.43 0.00 0.00 0.00 0.00 0.00 0.00 226,223,620.92
Project Type Total 0.00 100.00% 0.00 0.00 26,958,698.48 0.00 0.00 199,264,922.43 0.00 0.00 0.00 0.00 0.00 0.00 226,223,620.92
25 Relicensing 302 Franchises and Consents 0.00 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 0.00 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
26 Compliance&Mitigation 330 Land and Land Rights 0.00 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 0.00 100.00% 0.00
26 Compliance&Mitigation 302 Franchises and Consents 20,136,638.08 33.70% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 7,985,048.87 11,391.79 238,464.32 596,862.27 8,831,767.25
26 Compliance&Mitigation 331 Structures and Improvements 37,502,136.70 62.76% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 14,871,220.96 21,215.88 444,111.95 1,111,586.27 16,448,135.06
26 Compliance&Mitigation 332 Reservoirs,Dams,Waterways 884,177.44 1.48% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 350,614.64 500.20 10,470.70 26,207.56 387,793.10
26 Compliance&Mitigation 335 Misc Power Plant Equipment 294,172.38 0.49% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 116,652.09 166.42 1 3,483.68 8,719.45 129,021.64
26 Compliance&Mitigation 336 Roads,Railroads&Bridges 940,818.46 1.57% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 373,075.25 532.24 11,141.46 27,886.43 412,635.40
Project Type Total 59,757,943.06 100.00% 0.00 0.00 0.00 0.00 23,696,611.81 33,806.53 707,672.13 1,771,261.98 26,209,352.45
30 Station Load Control 3501X Land Owned in Fee-TS 0.00 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 0.00 100.00% 0.00
30 Station Load Control 353 Station Equipment 2,025,945.37 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 2,025,945.37 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
31 Step Up Stations 352 Structures and Improvements 255,072.28 4.09% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
31 Ste U Stations 353 Station Equipment 5,988,830.14 95.91% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 6,243,902.42 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
32 Transmission Station 3501X Land Owned in Fee-TS 0.00 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 0.00 100.00% 0.00
32 Transmission Station 352 Structures and Improvements 7,974,502.98 11.21% 0.00 446,435.69 1,591.32 211,476.73 459.59 95.94 351.77 239.84 0.00 0.00 0.00 0.00 660,650.86
32 Transmission Station 353 Station Equipment 63,042,404.64 88.66% 0.00 3,529,295.75 12,580.17 1,671,828.50 3,633.25 758.42 2,780.88 1,896.05 0.00 0.00 0.00 0.00 5,222,773.03
32 Transmission Station 397 Communication Equipment 91,982.67 0.13% 0.00 5,149.46 18.36 2,439.30 5.30 1.11 4.06 2.77 0.00 0.00 0.00 0.00 7,620.34
Project Type Total 71,108,890.29 100.00% 0.00 3,980,880.90 14,189.85 1,885,744.53 4,098.13 855.46 3,136.70 2,138.66 0.00 0.00 0.00 0.00 5,891,044.23
33 Transmission Lines 3501X Land Owned in Fee-TL 0.00 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 0.00 100.00% ' 0.00
33 Transmission Lines 35020 Land Rights and Easements 3,286,924.81 2.27% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 339,658.03 0.00 479,933.11 819,591.14
33 Transmission Lines 35022 Transm ROW Renewal Cost 138,105.43 0.10% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 14,271.28 0.00 20,165.16 34,436.44
33 Transmission Lines 354 Towers and Fixtures 40,844,332.14 28.17% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4,220,694.48 0.00 5,963,795.48 10,184,489.96
33 Transmission Lines 355 Poles and Fixtures 54,630,914.51 37.68% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5,645,346.30 0.00 7,976,813.03 13,622,159.33
33 Transmission Lines 356 Overhead Conductors,Devices 46,070,523.82 31.78% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4,760,748.81 0.00 6,726,886.38 11,487,635.19
Project Type Total 144,970,800.71 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 14,980,718.90 0.00 21,167,593.16 36,148,312.05
40 1 Underground Reconstruction 1366 1 Underground Conduit 15,731,958.08 12.57% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1,482,764.24 0.00 1,482,764.24
40 1 Underground Reconstruction 1367 1 Underground Conductors Device 94 407 141.00 75.44% 0.00 1 0.00 0.00 1 0.00 1 0.00 1 0.00 1 0.00 0.00 0.00 1 0.00 1 8,898,036.19 0.00 1 8,898,036.19
M.Larkin Workpaper
Case No.IPC-E-24-07
\\fillmore\RegAdmin\2024 Idaho General Rate Case\Workpapers\Larkin\LARKIN Workpaper 3-Incremental Plant Determination.xlsx Page 12 of 14
Closings to Pit>$8M Incremental Plant Determination

Closings to Plant Allocation%
By Project Type and Plant Account
2024
January February March April May June July August September October November December Total
Estimated Project Estimatetl Project s ima a rojec Estimatetl Project Estimatetl Project stimatetl Project stimatetl Project Estimated Project Estimatetl Project Estimatetl Project Estimatetl Project stimatetl Project
Proj Plant 5 Year Actual 5 Year Closing$ Type Closings by Type Closings by Type Closings by Type Closings by Type Closings by Estimated Project Type Type Closings by Type Closings by Type Closings by Type Closings by Type Closings by Type Closings by Type Closings by
Type Descr Account Descr Closing$ Percentage Account Account Account Account Account Closings by Account Account Account Account Account Account Account Account
40 Under round Reconstruction 368 Line Transformers 13,884,655.25 11.10% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1,308,652.75 0.00 1,308,652.75
40 Under round Reconstruction 369 Services 903,469.20 0.72% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.06 85,153.53 0.00 85,153.53
40 Under round Re construction 37000 Meters 211,434.66 0.17% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 19,928.08 0.00 19,928.08
40 Under round Reconstruction 37010 Meters-AMI 159.78 0.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 15.06 0.00 15.06
Project Type Total 125,138,817.97 100.00% 0.00 0.00 N0 0.00 0.00 0.00 11,794,549.85 11,794,549.85
41 Distribution Stations 360 Land and Land Rights 0.00 100.00% 0.00 E]E
00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 0.00 100.00% 0.00
41 Distribution Stations 361 Structures and improvements 13,639,588.92 17.58% 0.00 00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
41 Distribution Stations 362 Station Equipment 60,017,724.20 77.36% 0.00 00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
41 Distribution Stations 397 Communication Equipment 3,922,710.26 5.06% 0.00 00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
ProjectType Total 77,580,023.38 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00
42 Overhead New Business 364 Poles,Towers and Fixtures 0.00 0.00% 0.00 .00 0.00 0.00 0.00 7EI
0.00 0.00 0.00 0.00 0.00 0.00
42 Overhead New Business 365 Overhead Conductors,Devices 1,700,797.65 4.92% 0.00 .00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
42 Overhead New Business 368 Line Transformers 31,871,298.98 92.21% 0.00 .00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
42 Overhead New Business 369 Services 0.00 0.00% 0.00 .00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
42 Overhead New Business 37000 Meters 987,896.24 2.86% 0.00 .00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
42 Overhead New Business 37010 Meters-AMI 2,741.74 0.01% 0.00 .00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 34,562,734.61 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 n-
43 Overhead Reconstruction 364 Pales,Towers and Fixtures 74,581,756.94 42.06% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
43 Overhead Reconstruction 365 Overhead Conductors,Devices 30,546,379.54 17.23% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
43 Overhead Reconstruction 368 Line Transformers 69,011,545.38 38.92% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
43 Overhead Reconstruction 369 Services 2,118,901.13 1.20% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
43 Overhead Reconstruction 37000 Meters 1,054,388.46 0.59% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
43 Overhead Reconstruction 37010 Meters-AMI 322.59 0.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 177,313,294.04 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0
44 Underground Dud Vault 366 Underground Conduit 3,051,512.55 37.19% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
44 Underground Dud Vault 367 Underground Conductors,Device 4,160,774.53 50.71% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
44 Underground Dud Vault 368 Line Transformers 899,065.68 10.96% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
44 Underground Dud Vault 369 Services 15,705.66 0.19%
44 Underground Duct Vault 37000 Meters 77,935.75 0.95% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 8,204,994.17 100.00% 0.00 IIM 0.00 0.00 0.00 0.00 0.00 0.00 0.00 00
45 Underground New Business 366 Underground Conduit 0.00 0.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
45 Underground New Business 367 Underground Conductors,Device 0.00 0.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
45 Underground New Business 368 Line Transformers 90,585,065.72 88.84% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
45 Underground New Business 369 Services 8,616,624.56 8.45% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
45 Underground New Business 37000 Meters 2,756,772.29 2.70% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
45 Underground New Business 37010 Meters-AMI 2,241.64 0.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 101,960,704.21 100.00% 0.00 0.00 �.00 0.00 0.00 "M 0.00 0.00 0.00 0.00 �i00 1W 0.00 0.00
46 Ni ht uard Lighting 371 Installations,Cust Premises 2,432,619.32 100.00% 0.00 0.00 0.00 0.00 0.00 1 0.00 0.00 0.00 1 0.00 0.00 0.00 1 0.00 1 0.00
Project Type Total 2,432,619.32 100.00% 0.00 0.00 �0.00 : 0.00 0.00 0.00 0.00 0.00 0.00 0.00 -0.00 0.00 0.00
47 Street Lighting 364 Poles,Towers and Fixtures 223,783.27 5.24% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
47 Street Lighting 373 Street Lighting,Signal System 4,046,886.98 94.76% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 4,270,670.25 100.00% 0.00 0.00 = 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0�.00 9W 0.00 0.00
49 Meter Purchases 37000 Meters 991,298.23 2.67% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
49 Meter Purchases 37010 Meters-AMI 36,172,918.44 97.33% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 37,164,216.67 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 O.00 0.00 0.00 0.00 0.00 0.00
51 General Plant Lands&Buildings 389 Structures and Improvements 0.00 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 0.00 100.00% 0.00
51 General Plant Lands&Building 390 Structures and Improvements 33,214,472.11 100.00% 0.00 0.001 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 33,214,472.11 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
52 General Plant-Office Furniture 391 Office Furniture,Equipment 1,807,451.49 100.001%. 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 1,807,451.49 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
53 Transportation Equipment 392 Transportation Equipment 62,680,967.37 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 62,680,967.37 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
54 General Plant-Stores Equipment 393 Stores Equipment 2,443,581.26 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 2,443,581.26 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
55 Shop/Garage Tools&Equipment 394 Tools,Shop,Garage Equipment 6,049,719.45 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1 0.00 1 0.00 0.00 0.00 0.00 0.00
Project Type Total 6,049,719.45 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
56 General Plant-Laboratory Equip 395 Laboratory Equipment 4,092,521.48 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 4,092,521.48 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
57 Power Operated Equipment 396 Power Operated Equipment 14,875,422.63 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 14,875,422.63 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
58 Data&Word Processing Equip. 391 Office Furniture,Equipment 29,181,591.53 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 29,181,591.53 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
59 Gen.Plant-Other Office Equip. 391 Office Furniture,Equipment 160,777.06 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 160,777.06 100.00% 0.00 0.00 ' 0.00 0.00 0.00 0.00 0.00 = 0.00 0.00 0.00 0.00 0.00 0.00
61 Communication Lines 397 Communication Equipment 228,837.44 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 t22
0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 228,837.44 100.00% 0.00 �0.00 0.00 0.00 -W 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
62 Gen.Plant-Communication Equip 397 Communication Equipment 15,023,875.68 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 15,023,875.68 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
70 General Plant-Misc.Equipment 1398 1 Miscellaneous Equipment 5,065,118.85 100.00% 0.00 1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Project Type Total 5,065,118.85 100.00% 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
M.Larkin Workpaper
Case No.IPC-E-24-07
\\fillmore\RegAdmin\2024 Idaho General Rate Case\Workpapers\Larkin\LARKIN Workpaper 3-Incremental Plant Determination.xlsx Page 13 of 14
Closings to Pit>$8M Incremental Plant Determination

Closings to Plant Allocation
By Project Type and Plant Account
2024
January February March April May June July August September October November December Total
Estimatetl Project Estimatetl Project Esurna a rojec Estimatetl Project Estimatetl Project stimatetl Project Estimatetl Project Estimated Proje stimatetl Project Estimatetl Project Estimatetl Project Estimatetl Project
Proj Plant 5 Year Actual 5 Year Closing$ Type Closings by Type Closings by Type Closings by Type Closings by Type Closings by Estimated Project Type Type Closings by Type Closings by Type Closings by Type Closings by Type Closings by Type Closings by Type Closings by
Type Descr Account Descr Closing$ Percentage Account Account Account Account Account Closings by Account Account Account Account Account Account Account Account
Total 1 492 438 092.07 0.00 3,980,880.90 26 972 888.33 1,885,744.53 4,098.13 199 265 777.90 3,136.70 2.138.66 23 696 611.81 25 868 918.48 12 957 656.19 23 181 357.24 317 819 208.86
M.Larkin Workpaper
Case No.IPC-E-24-07
\\fillmore\RegAdmin\2024 Idaho General Rate Case\Workpapers\Larkin\LARKIN Workpaper 3-Incremental Plant Determination.xlsx Page 14 of 14
Closings to Pit>$81M Incremental Plant Determination

IDAHO POWER COMPANY
Interest Synchronization -IPC-E-24-07
LINE NO. DESCRIPTION 2023 2024 INCREMENTAL INTEREST SYNC
1 Total Company Rate Base 4,092,522,974 4,855,723,284 763,200,310
Adjustments to Rate Base:
2 Construction Work-in-Progress 738,298,620 1,014,178,013 275,879,394
3 Adjusted Rate Base 4,830,821,594 5,869,901,297 1,039,079,704
4 Company Weighted Cost of Debt 2.447%
5 Synchronized Interest Expense
M.Larkin Workpaper
Case No.IPC-E-24-07
Page 1 of 1
LARKIN W orkpaper 4-In/eras/Syn—IsW5/30/2024/Jcb Interest Sync

LARKIN Workpaper 5 - O&M Labor.xlsx
O&M Labor
Year to Date Payroll as % of Total Year
(2021 thru 2023)
2021 2022 2023 3 Yr Total 3yr Avg % 2024 Payroll
Jan 13,580,316 13,515,715 15,254,456 42,350,487 8.4% 17,043,196
Feb 12,480,722 13,673,027 15,413,478 41,567,226 16.7% 16,131,245
Mar 13,930,240 14,822,019 16,465,862 45,218,121 25.7%
Apr 13,167,461 13,376,578 14,290,014 40,834,053 33.8%
May 12,417,933 13,813,719 15,918,099 42,149,751 42.2%
Jun 13,041,800 13,459,770 14,616,382 41,117,952 50.4%
Jul 13,235,366 12,816,103 13,945,783 39,997,252 58.3%
Aug 12,604,445 14,414,850 15,101,558 42,120,852 66.7%
Sep 11,399,600 14,123,087 14,595,216 40,117,903 74.7%
Oct 13,038,751 13,510,332 14,826,111 41,375,194 82.9%
Nov 12,866,656 13,889,919 14,156,630 40,913,205 91.1%
Dec 14,210,778 15,473,323 15,128,897 44,812,998 100.00%
155,974,068 166,888,441 179,712,486 502,574,994 Feb YTD 33,174,442
3yr Avg % 16.7%
2024 projected Base 198,678,494
Less: Mid Year 2% GWA 3,507,696
2024 projected Labor 195,170,798
Annualizing adjustment 1,561,952
Proposed 2025 GWA @ 3% 5,901,982
Incentive 10,845,454
Total O&M Labor Forecast 213,480,186
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 1 of 7
O&M Labor

LARKIN Workpaper 5-O&M Labor.xlsx
Idaho Power Company A
Detail of Adjustments to 2024
Operating Expenses
Line Source
No. Page Amount
1) Operating Payroll (Various accts)
1 1 Actual Total Year 2023 ST Payroll 238,650,681
2 1 Actual December 2023 ST Payroll 18,536,531
3 Annualized December 2023(Dec times 13) x 13 240,974,907
4 Increase Over 2023 Actual 2,324,226
5 1 O&M Percentage 47.83%
6 Annualized December 2024 O&M ST payroll 1,111,589
7 3 Benefit Loading Percent 40.52%
8 Annualized December 2024 O&M ST w/Loading $ 1,561,952
2) Incentive Expense(920 account))
9 A Annualized December 2024 ST Payroll $ 240,974,907
10 2 Plus: 2023 Overtime Payroll-All Accounts 14,456,385
11 5 Less:2023 Officer Payroll (5,144,261)
12 1 Times Annualized Payroll Growth Factor 0.97% (5,194,361)
13 Total Payroll Excl Officers 250,236,930
14 CRI & Reliability Incentive Rates-Normalized 4.00%
15 Normalized Incentive 10,009,477
16 3 Payroll Tax on Normalized Incentive @ 9.44% 945,001
17 Normalized Incentive Including Payroll Tax 10,954,478
18 6 Times incentive operating percent 99.00%
19 Adjustment to Operating Expense for Incentive $ 10,845,454
3) 2024 Operating Payroll SSA(Various accts)
20 A 2024 O&M Labor FCST $ 195,170,798
21 Annualized December 2024 O&M ST w/Loading $ 1,561,952
22 Total 2024 O&M Labor 196,732,750
23 2025 Structured Salary Adjustment 3.00% 5,901,982
24 Adjustment to Operating Expense for SSA $ 5,901,982
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 2 of 7
O&M Labor

LARKIN Workpaper 5 - O&M Labor.xlsx
2023 ACTUAL for 111 - STRAIGHT TIME PAYROLL source Page 1
By Account and Month
1 -O&M 2-Construction 3-Other 242 Accounts Total
Jan,23 7,685,954 4,511,982 952,259 5,052,162 18,202,357
Feb,23 9,633,525 5,860,149 1,186,289 1,657,144 18,337,107
Mar,23 13,515,224 8,345,237 1,727,423 3,752,062 27,339,946
Apr,23 9,344,668 6,094,652 1,211,167 1,588,564 18,239,051
May,23 9,190,906 5,989,094 1,145,691 1,919,293 18,244,984
Jun,23 8,481,399 5,563,806 1,087,079 3,208,774 18,341,057
Jul,23 8,284,229 5,334,427 1,078,112 3,701,990 18,398,758
Aug,23 8,738,824 6,074,047 1,160,647 2,438,631 18,412,149
Sep,23 13,123,022 8,975,067 1,696,608 3,832,365 27,627,062
Oct,23 8,795,428 6,271,697 1,174,641 2,216,697 18,458,462
Nov,23 8,206,944 5,736,081 1,093,735 3,476,456 18,513,216
Dec,23 9,137,402 6,203,226 1,216,726 1,979,177 18,536,531
114,137,525 74,959,464 14,730,377 34,823,314 238,650,681
%of Total 47.83% 31.41% 6.17% 14.59% 100.00%
Annualized December(x 13) 240,974,907
Annualized Payroll Growth Factor 0.97%
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 3 of 7
O&M Labor

LARKIN Workpaper 5-O&M Labor.xlsx
Idaho Power Company Source Page 2
Overtime by Account
2023 Actual Overtime Payroll
(Source = ACB Cube DCE 112)
1 - O&M 6,920,262
2 - Construction 6,887,487
3 - Other 648,635
Total 14,456,385
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 4 of 7
O&M Labor

LARKIN Workpaper 5-O&M Labor.xlsx
2023 Actual Benefits Loading % Source Page 3
Feb-24 2023
111 -STRAIGHT TIME PAYROLL 19,495,532 F 2 88,650,681
131 -INDIRECT BENEFIT LOADING 6,058,070 31.07% 66,951,867 28.05%
140-TAXES-EMPLOYER PAID 1,840,585 9.44% 18,681,741 7.83%
Subtotal loading 7,898,655 40.52% 85,633,607 35.88%
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 5 of 7
O&M Labor

LARKIN Workpaper 5-O&M Labor.xlsx
Source Page 4
Idaho Power Company
2023 Officer Gross Payroll
I=lDescr 11 TSOURCE Sum TOTAMT
111 Total LE 5,144,261.10
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 6 of 7
O&M Labor

LARKIN Workpaper 5 - O&M Labor.xlsx
Source Page 5
2023 Incentive by Account
All Cost Element
1 -O&M Jan,23
1 -O&M Feb,23 3,043,641.04
1 -O&M Mar,23 2,772,439.40
1 -O&M Apr,23 1,822,871.34
1 -O&M May,23 1,822,662.15
1 -O&M Jun,23 1,806,530.76
1 -O&M Jul,23 1,822,761.41
1 -O&M Aug,23 1,821,983.89
1 -O&M Sep,23 3,177,111.72
1 -O&M Oct,23 1,960,581.58
1 -O&M Nov,23 1,971,048.20
1 -O&M Dec,23 7,820,447.83
1 -O&M Subtotal 29,842,079.32 99.005%
3-Other Jan,23
3-Other Feb,23 25,513.96
3-Other Mar,23 15,797.36
3-Other Apr,23 16,741.66
3-Other May,23 16,950.85
3-Other Jun,23 21,890.24
3-Other Jul,23 14,987.59
3-Other Aug,23 15,765.11
3-Other Sep,23 35,183.28
3-Other Oct,23 29,896.42
3-Other Nov,23 19,429.80
3-Other Dec,23 87,832.17
3 -Other Subtotal 299,988.44 0.995%
Subtotal Jan,22
Subtotal Feb,22 3,069,155.00
Subtotal Mar,22 2,788,236.76
Subtotal Apr,22 1,839,613.00
Subtotal May,22 1,839,613.00
Subtotal Jun,22 1,828,421.00
Subtotal Jul,22 1,837,749.00
Subtotal Aug,22 1,837,749.00
Subtotal Sep,22 3,212,295.00
Subtotal Oct,22 1,990,478.00
Subtotal Nov,22 1,990,478.00
Subtotal Dec,22 7,908,280.00
Subtotal Subtotal 30,142,067.76 100.000%
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 7 of 7
O&M Labor

I IDAHO POWER COMPANY EXPORT EXPORT EXPORT
2 SUPPORT FOR ALLOCATED COST OF SERVICE STUDY AREA AREA AREA
3 EXPORT EXPORT EXPORT
4 AREA AREA AREA
5 Blazk =Direct Input Data&Te#. (AF) (AK) (AL)
6 Red=Reverenced Cells. UD (E) (F) (c) (H) TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL
7 Blue=Formulas. TOTALS Annualizing 2024 Increment OTHER REG. 2023 GRC Adj SYSTEM Adjusted 2024 SYSTEM Adjusted 2024
8 DESCRIPTION PER BOOKS ADJUST. ADJUST. ADJUST. ADJUST. PER BOOKS 2023 Increment PER BOOKS 2023 Increment
9"'SUMMARY OF RESULTS"' - L.D) (=COLS.D:E+H+K:L) (=COLS.D:H+K:M
10
11 DEVELOPMENT OF RATE BASE COMPONENTS
12
13 ELECTRIC PLANT IN SERVICE 6,238,594,514 0 860,366,648 0 0 6,238,594,514 6,238,594,514 7,098,961,062 6,238,594,514 6,238,594,514 7,098,961,062
14 LESS:ACCUM PROVISION FOR DEPRECIATION 2,099,026,164 2,685,214 88,598,095 0 0 2,099,026,164 2,101,711,378 2,190,309,473 2,099,026,164 2,101,711,378 2,190,309,4]3
15 AMORT OF OTHER UTILITY PLANT 41,962,522 237,560 5,394,687 0 0 41,962,522 42,200,082 47,594,769 41,962,522 42,200,082 47,594,769
16 NET ELECTRIC PLANT IN SERVICE 4,097,605,828 (2,922,773) 766,373,765 0 0 4,097,605,828 4,094,683,054 4,861,056,819 4,097,605,828 4,094,683,054 4,861,056,819
17 LESS:CUSTOMER ADV FOR CONSTRUCTION 32,170,424 0 0 0 0 32,170,424 32,170,424 32,170,424 32,170,424 32,170,424 32,170,424
18 LESS:ACCUM DEFERRED INCOME TAXES 385,929,342 0 3,173,455 (1,429,987) 0 385,929,342 384,499,355 387,672,810 385,929,342 384,499,355 387,672,810
19 ADD:PLT HLO FOR FUTURE+ACQUIS ADJ 9,379,315 0 0 (801,330) (8,751,068) 9,379,315 8,577,985 (173,083) 9,379,315 8,577,985 (173,083)
20 ADD:WORKING CAPITAL 157,794,969 0 0 (18,310,764) 0 157,794,969 139,484,205 139,484,205 157,794,969 139,484,205 139,484,205
21 ADD:CONSERVATION+OTHER DFRD PROG. 26,912,065 0 0 0 26,678,227 26,912,065 26,912,065 53,590,292 26,912,065 26,912,065 53,590,292
22 ADD:SUBSIDIARY RATE BASE 36,192,061 0 0 0 0 36,192,061 36,192,061 36,192,061 36,192,061 36,192,061 36,192,061
23
24 TOTAL COMBINED RATE BASE 3,909,784,472 (2,922,773) 763,200,310 (17,682,10B) 17,927,159 3,909,784,472 3,8B9,179,591 4,670,307,060 3,909,784,472 3,889,179,591 4,670,307,060
25
26 RATE OF RETURN UNDER PRESENT RATES
27 OPERATING REVENUES
28 SALES REVENUES 1,562,807,566 0 0 (461,752,761) 211,824,243 1,562,807,566 1,101,054,805 1,312,879,048 1,562,807,566 1,101,054,805 1,312,879,048
29 OTHER OPERATING REVENUES 117,737,446 0 0 (27,291,960) 0 117,737,446 90,445,486 90,445,486 117,737,446 90,445,486 90,445,486
30 TOTAL OPERATING REVENUES 1,680,545,011 0 0 (489,044,721) 211,824,243 1,680,545,011 1,191,500,290 1,403,324,534 1,680,545,011 1,191,500,290 1,403,324,534
31 OPERATING EXPENSES
32 OPERATION 8 MAINTENANCE EXPENSES 1,168,028,887 1,340,562 19,557,535 (457,957,469) 203,496,674 1,168,028,887 711,411,980 934,466,188 1,168,028,887 711,411,980 934,466,188
33 DEPRECIATION EXPENSE 147,575,568 5,370,428 21,088,273 0 0 147,575,568 152,945,996 174,034,269 147,575,568 152,945,996 174,034,269
34 AMORTIZATION OF LIMITED TERM PLANT 5,439,874 475,119 2,265,315 769,099 0 5,439,874 6,684,092 8,949,407 5,439,874 6,694,092 8,949,407
35 ACCRETION EXPENSE 12,995 0 0 0 0 12,995 12,995 12,995 12,995 12,995 12,995
36 TAXES OTHER THAN INCOME 25,081,924 0 0 472,238 0 25,081,924 25,554,161 25,554,161 25,081,924 25,554,161 25,554,161
37 REGULATORY DEBITS/CREDITS 1,846,154 0 0 0 3,811,175 1,846,154 1,946,154 5,657,329 1,846,154 1,846,154 5,667,329
38 PROVISION FOR DEFERRED INCOME TAXES (17,705,575) 0 3,173,455 (891,913) 0 (17,705,575) (18,597,487) (15,424,032) (17,705,575) (18,597,487) (15,424,032)
39 INVESTMENT TAX CREDIT ADJUSTMENT 50,193,136 0 73,978,000 0 0 50,193,136 50,193,136 124,171,136 50,193,136 50,193,136 124,171,136
40 FEDERAL INCOME TAXES (16,113,562) (1,418,538) 2,862,852 (5,325,230) 1,091,560 (16,113,562) (22,857,330) (18,902,918) (16,113,562) (22,857,330) (18,902,918)
41 STATE INCOME TAXES 934,158 (431,167) (3,468,598) (7,926,409) 331,781 934,158 (7,423,417) (10,560,234) 934,158 (7,423,417) (10,560,234)
42 TOTAL OPERATING EXPENSES 1,365,293,558 5,336,405 119,456,831 (470,859,684) 208,731,191 1,365,293,558 899,770,278 1,227,958,301 1,365,293,558 899,770,278 1,227,958,301
43 OPERATING INCOME 315,251,453 (5,336,405) (119,456,831) (18,185,037) 3,093,062 315,251,453 291,730,012 175,366,233 315,251,453 291,730,012 175,366,233
44 ADD:IERCO OPERATING INCOME �,033,987 0 0 0 0 8,033,987 8,033,987 8,033,987 8,033,987 8,033,987 8,033,987
45 CONSOLIDATED OPERATING INCOME 323,285,440 (5,336,405) (119,456,831) (18,185,037) 3,093,052 323,285,440 299,763,999 183,400,220 323,285,440 299,763,999 183,400,220
46
47 RATE OF RETURN UNDER PRESENT RATES 8.269% 8.269% 7.708% 3.927% 8.269% 7.708% 3.927%
48•••SUMMARY OF RESULTS+++
49
50 RATE OF RETURN UNDER PRESENT RATES
51 TOTAL COMBINED RATE BASE 3,909,784,472 (2,922,773) 763,200,310 (17,682,108) 17,927,159 3,909,784,472 3,889,179,591 4,670,307.060 3,909,784.472 3,889.179,591 4,670,307,060
52
53 SALES REVENUES 1,562,807,566 0 0 (461,752,761) 211,824,243 1,562,807.566 1.101,054,805 1,312,879,048 1,562,807,566 1,101,054,805 1,312,879,048
54 OTHER OPERATING REVENUES 117,737,446 0 0 (27,291,960) 0 117,737,446 90,445,486 90,445,486 117,737,446 90,445,486 90,445,486
55 TOTAL OPERATING REVENUES 1,680,545,011 0 0 (489,044,721) 211,824,243 1,680,545.011 1.191,500,290 1,403,324,534 1,680,545,011 1,191,500,290 1,403,324,534
56 OPERATING EXPENSES
57 OPERATION B MAINTENANCE EXPENSES 1,168,028,887 1,340,562 19,557,535 (457,957,469) 203,496,674 1,168,028,887 711,411,980 934,466,188 1,168,028,887 711,411,980 934,466,188
58 DEPRECIATION EXPENSE 147,575,568 5,370,428 21,088,273 0 0 147,575,568 152,945,996 174,034,269 147,575,568 152,945,996 174,034,269
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 1 of 202
Results of Operations Model

59 AMORTIZATION OF LIMITED TERM PLANT 5,439,874 475,119 2,265,315 769,099 0 5,439,874 6,684,092 8,949,407 5,439,874 6,684,092 8,949,407
60 ACCRETION EXPENSE 12,995 0 0 0 0 12,995 12,995 12,995 12,995 12,995 12,995
61 TAXES OTHER THAN INCOME 25,081,924 0 0 472,238 0 25,081,924 26,554,161 25,554,161 25,081,924 25,564,161 25,554,161
62 REGULATORY DEBITS/CREDITS 1,846,154 0 0 0 3,811.175 1,846,154 1,846,154 5,657,329 1,846,154 1,846,154 5,657,329
63 PROVISION FOR DEFERRED INCOME TAXES (17,705,575) 0 3,173,455 (891,913) 0 (17,705,575) (18,597,487) (15,424,032) (17,705,575) (18,597,487) (15,424,032)
64 INVESTMENT TAX CREDIT ADJUSTMENT 50,193,136 0 73.978,000 0 0 50,193.136 50,193.136 124,171,136 50,193.136 50.193,136 124,171,136
65 FEDERAL INCOME TAXES (16,113,562) (1,418,538) 2,862,852 (5,325,230) 1,091,560 (16,113,562) (22,857,330) (18,902,918) (16,113,562) (22,857,330) (18,902,918)
66 STATE INCOME TAXES 934,158 (431,167) (3,468,598) (7,926,409) 331,781 934,158 (7,423,417) (10,560,234) 934,158 (7,423,417) (10,560,234)
67 TOTAL OPERATING EXPENSES 1,365,293,558 5,336,405 119,456,831 (470,859,684) 208,731,191 1,365,293,558 899,770,278 1,227,958,301 1,365,293,558 899,770,278 1,227,958,301
68 OPERATING INCOME 315,251,453 (5,336,405) (119,456,831) (18,185,037) 3,093,052 315,251,453 291,730.012 175,366,233 315,251,453 291,730,012 175,366,233
69 ADD:IERCO OPERATING INCOME 8,033,987 0 0 0 0 8,033.987 8,033,987 8,033,987 8,033,987 8,033,987 8,033,987
70 CONSOLIDATED OPERATING INCOME 323,285,440 (5,336,405) (119,456,831) (18,185,037) 3,093,052 323,285,440 299,763,999 183,400,220 323,285,440 299.763,999 183,400,220
71 RATE OF RETURN UNDER PRESENT RATES 8.269% 8.269% T708% 3.927% 8.269% 7.708% 3.927%
72
73 DEVELOPMENT OF REVENUE REQUIREMENTS
74 RATE OF RETURN REQUIRED(BASED ON 10%ROE)
75
76 RETURN AT CLAIMED RATE OF RETURN
77 EARNINGS DEFICIENCY
78 ADD:CWIP(RELICENSING)
79 DEFICIENCY WITH CWIP
80
81 NET-TO-GROSS TAX MULTIPLIER
82
83 REVENUE DEFICIENCY
84
85 FIRM JURISDICTIONAL REVENUES
86
87 PERCENT INCREASE REQUIRED
88
89 SALES AND WHEELING REVENUES REQUIRED
90"`TABLE 1-ELECTRIC PLANT IN SERVICE"`
91
92 INTANGIBLE PLANT
93 301-ORGANIZATION 5,7� 0 0 0 5,703 5,703 5,703 5,703 5.703 5,703
94302-FRANCHISES&CONSENTS 52,232,057 0 0 0 52,232,057 52,232,057 67,301,183 52,232,057 52,232,057 67,301,151
95 303.MISCELLANEOUS 54,860,902 0 0 0 54,860,902 54,860,902 77,770,770 54,860,902 54,860,902 77,770,770
96
97 TOTAL INTANGIBLE PLANT 107,098,661 0 37,978,995 0 0 107,098,661 107,098,661 145,077,656
98
99 PRODUCTION PLANT
100 310-316/STEAM PRODUCTION 267,538a 0 0 0 267,538,090 267,538,090 297,714,102 267,538,090 267,538,090 297,714,102
101 330-336/HYDRAULIC PRODUCTION 1,100,725,931 0 0 0 1,100,725,931 1,100,725,931 1,211,835,338 1,100,725,931 1,100,725,931 1,211,835,338
101 340-346/OTHER PRODUCTION-LANGLEY 410,062,584 0 0 0 410,062,594 410,062,594 415,522,763 410,062,594 410,062,584 415,522,763
102340-346/OTHER PRODUCTION-DANSKIN/BENNETT MTN 199,966.966 0 0 0 199,966,966 199,966,966 202,289,103 199,966,966 199,966,966 202,289,103
103
104 TOTAL PRODUCTION PLANT 1,978,293.572 0 149.067,736 0 0 1,978,293.572 1,978,293.572 2.127,361,308
105
106 TRANSMISSION PLANT
107 350/LAND&LAND RIGHTS
108 TRANSMISSION SERVICE 41,300,354 0 3,823,204 0 0 41,300,354 41,300,354 45,123,558 41,300,354 41,300,354 45,123,558
1 DIRECT ASSIGNMENT 0 0 0 0 0 0 0 0 0 0
110 10 TOTAL ACCOUNT 350 41,300,354 0 0 41,300,354 41,300,354 45,123,558
111
112 352/STRUCTURES&IMPROVEMENTS
113 TRANSMISSION SERVICE 102,251,406 0 8,726,398 0 0 102,251,406 102,251,406 110,977,804 102,251,406 102,251,406 110,977,804
115 DTOTAL ACCOUNT 3 2 0 0 0 102.252,8064 102,252,8064 110.978,462 658 656 658
116
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 2 of 202
Results of Operations Model

117 353/STATION EQUIPMENT
118 TRANSMISSION SERVICE 470,680.037 0 39.041,265 0 0 470,680.037 470,680,037 509,721,3('" 470,680.037 470,680,037 509,721,302
119 DIRECT ASSIGNMENT 11 0 0 0 111,594 111,694 111.Sc- 111,694 111.594 111594
120 TOTAL ACCOUNT 353 ,79 0 0 '.70,791,630 470,791,630 509,832,8',
121"'TABLE 1-ELECTRIC PLANT IN SERVICE"'
122
123 354/TOWERS&FIXTURES
124 TRANSMISSION SERVICE 232,732,978 0 17,023,912 0 0 232,732,978 232,732,978 249,756,890 232,732,978 232,732,978 24-
125 DIRECT ASSIGNMENT 0 0 0 0 0 0 0 0
126 TOTAL ACCOUNT 354 232,732,978 0 0 232,732,978 232,732,978 249,756,890
127
128 355/POLES&FIXTURES
129 TRANSMISSION SERVICE 235,909,163 0 35,542,070 0 0 235,909,163 235,909,163 271,451,233 235,909,163 235,909,163 271,451,23:
130 DIRECT ASSIGNMENT 33,842 0 0 0 33,842 33,842 33,842 33,842 33,842 33,84,
131 TOTAL ACCOUNT 355 235,943,004 0 0 235,943,004 235,943,004 271,485,075
32
133 356/OVERHEAD CONDUCTORS&DEVICES
134 TRANSMISSION SERVICE 269,020,474 0 21,239,816 269,020,474 269,020,474 290,260,290 269,020,474 269,020,474 290,260,290
135 DIRECT ASSIGNMENT 0 26,495 26,495 26,495 26,495 26,495 26,495
136 TOTAL ACCOUNT 356 269,046, 0 269,046,969 269,046,99 290,286,785
137
138 359/ROADS&TRAILS
139 TRANSMISSION SERVICE 391,407 0 14,825 391,407 391,407 406,231 391,407 391,407 40r"
14 DIRECT ASSIGNMENT 0 0 0 10 0 0
141 TOTAL ACCOUNT 359 0 391,407 391,407 406,231
142
143 TOTAL TRANSMISSION PLANT 1,352,458,407 0 125,411,490 1,352,458,407 1,352,458,407 1,477,869,896
144..`TABLE 1-ELECTRIC PLANT IN SERVICE...
145
146 DISTRIBUTION PLANT
147
148 360/LAND&LAND RIGHTS 9,024,558 0 790,679 0 0 9,024,558 9,024,558 9,815,231 9'024,558 9,024,55E 9,815,231
149 361/STRUCTURES&IMPROVEMENTS 62,286'19 0 11,523,247 0 0 62,286'419 62,286,419 73.809,666 62,286,419 62,286,419 73,809,666
150 362/STATION EQUIPMENT 333,778,528 0 27,612,144 0 0 333,776,528 333,778,528 381,390,672 333,776,528 333,778,526 361,390,672
151 363/BATTERY STORAGE 52,299,287 0 55,278.328 0 0 52,299,267 52,299,287 307,577,615 52,299,287 52,299,287 307,577,615
152364/POLES,TOWERS&FIXTURES 333,422,399 0 33,381,747 0 0 333,422,399 333,422,399 386,804,146 333,422,399 333,422,399 386,804,146
153 365/OVERHEAD CONDUCTORS&DEVICES 161,939,763 0 11,001,229 0 0 161,939,763 161,939,763 172,940,993 161,939,763 161,939,763 172,940,993
154366/UNDERGROUND CONDUIT 55,753,674 0 6,574,5124 0 0 55,753,674 55,753,674 62,328,189 55,753,674 55,753,674 62,328,189
155 367/UNDERGROUND CONDUCTORS&DEVICES 338,826,990 0 46,244,520 0 0 338.826,990 338,826,990 385,071,509 338,826,990 338,826,990 385,071,509
11636B/LINE TRANSFORMERS 750,275,508 0 74,202,519 0 0 750,275,508 750,275,508 824,478,027 750,275,508 750,275,50E 824,478,027
157 369/SERVICES 70,650,589 0 4,233,117 0 0 70,651,511 70,650,589 74,883,706 70,650,589 70,650,589 74,883,706
158 370/METERS 115,905,804 0 8,870,581 0 0 115'905,804 115,905,804 124,776,385 115,905,804 115,905,804 124,776,385
159 371/INSTALLATIONS ON CUSTOMER PREMISES M5.271,974 0 1,232.045 0 0 5,271,974 5,271,974 6,504,019 5,271,974 5,271,974 6.504'1,
1603731 STREET LIGHTING SYSTEMS 8,798,038 0 822900 0 0 6,798,038 6,798,038 7,620,938 6,796,038 6,798,038 7,620,938
61
162 TOTAL DISTRIBUTION PLANT 2,296,233,531 0 481,767,571 0 0 2,243,934,245 2,243,934,245 2,470,423,487
163
164 GENERAL PLANT
165 3891 LAND&LAND RIGHTS 21,009.062 0 377 0 0 21,009,062 21,009,062 21,145,439 21,009,062 21,009,062 21,145,439
i66 390/STRUCTURES&IMPROVEMENTS 160,648,651 0 ,351 0 0 160,646,651 160,648,651 178,056,002 160,646,651 160,648,651 178,056,002
167 391/OFFICE FURNITURE&EQUIPMENT 41,685.122 0 4,457,350 0 0 41'685,122 41,685,122 46,142,473 41,685,122 41,685,122 46,142,473
168 392/TRANSPORTATION EQUIPMENT 123,353,458 0 26,318,300 0 0 123,353ASS 123,353,458 149,671,758 123,353,458 123,353,45E 149,671,758
169 393/STORES EQUIPMENT 5,755,716 0 1,520,721 0 0 5,755,716 5,755,716 9,276,437 5,755,716 5,755,716 91276A 7
170 394/TOOLS,SHOP&GARAGE EQUIPMENT 15,329,002 0 1,202,850 0 0 15,329,002 15,329,002 16,531,852 15,329,002 11,321,002 16,531,852
171 395/LABORATORY EQUIPMENT 15,855,583 0 1,833,226 0 0 15,855,583 151855,583 17,688,809 15,855,583 15,855,583 17,688,809
172 396/POWER OPERATED EQUIPMENT 28,599,41 0 3,928,251 0 0 28,599,410 28,591,110 32,527,731 28,599,480 28,599,480 32,527,731
173397/COMMUNICATIONS EQUIPMENT 81,280,140 0 9,987 0 0 81,280,140 81,280,140 .8,540,127 81,280,140 81,280,140 .8,540,121
1743111 MISCELLANEOUS EQUIPMENT 10,994,14 0 344 0 0 10,994,128 10,994,128 11,070,472 10,994,128 10,994,128 11,070,472
75
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 3 of 202
Results of Operations Model

176 TOTAL GENERAL PLANT 504,510,343 0 66,140,756 0 0 504,510,343 504,510,343 570,651,099
177
178 TOTAL ELECTRIC PLANT IN SERVICE 6,238,594,514 0 860,366,548 0 6,186,295,227 6,186,295,227 6,791,383.447
179
180"'TABLE 2-ACCUMULATED PROVISION FOR DEPRECIATION"'
181
182 PRODUCTION PLANT
183 310-316/STEAM PRODUCTION 153,589.237 175,384 38.-M 0 0 153,581,237 153,765,621 192,595,403 153,581,237 153,765,621 192,595,403
184 330-336/HYDRAULIC PRODUCTION 512,200,799 553,906 23,502,564 0 0 512.200,799 512.754,704 536.257,268 512.200,799 '12,764.704 536,257,268
184340-3461 OTHER PRODUCTION 951316,793 (157,530) (9,142,918) 0 0 95,316,793 95,159,263 86,016,347 95,316,793 95,159,263 86,016,347
165 340-346/OTHER PRODUCTION-DANSKIN/BENNETT MTN 68,783,440 (113,678) (3'888,354) 0 0 68,783,"0 68,669,762 64,781,409 68,783,"0 68,669,762 64,781,409
186 TOTAL PRODUCTION PLANT 829,890,269 459,082 49,301,076 0 0 829,890,269 830,349,351 879,650,427
67
188 TRANSMISSION PLANT
189350/LAND&LAND RIGHTS 10,201,176 699 438,309 0 0 10,201,176 10,201,871 10,640,114 10,211,176 10,201,175 11,641,184
190352/STRUCTURES&IMPROVEMENTS 34,024,191 34,476 1.119,495 0 0 34,024,191 34,058,667 35,178,162 34,024'191 34,058,667 35,178,162
191 353/STATION EQUIPMENT 124,571,292 117,38' 914,1 0 0 124,571,292 124,686,613 125,602,861 124,571,292 124,688,673 125,602,861
192354/TOWERS&FIXTURES 80,393,821 (1,085) 2,1 0 0 80,393,821 80,312,731 82,555,492 80,393,821 80,312,736 82,555,492
193 355/POLES&FIXTURES 80,452,007 85,235 1,28
0 0 80,452,007 80,137,242 81,819,694 80,452,007 80,537,242 81,819,694
194356/OVERHEAD CONDUCTORS&DEVICES 90,157,528 1,648 (643,591) 0 0 90,157,528 90,159,176 .9,515,586 90,157,528 90,159,176 89,575,586
195 359/ROADS&TRAILS 297,401 0 2,744 0 0 297,401 297,401 300,145 297,401 297,401 300,145
196 TOTAL TRANSMISSION PLANT 420,09�416 238,355 5276,353 0 0 420,097,416 420,335,T71 425,612,124
97
198 DISTRIBUTION PLANT
199 360/LAND&LAND RIGHTS 238,693.81 0 28.342 0 0 238,694 231,694 267,036 238,694 238,694 267,036
200361/STRUCTURES&IMPROVEMENTS 16,741,102.91 33,912 8221436 0 0 16,741,103 16,775,015 17,.7,451 16,741,103 16,775,015 17,597,451
201 362/STATION EQUIPMENT 73,780,227.15 35,544 3,129,730 0 0 73,780,227 73,815,771 76,945,502 73,780,227 73,815,771 76,945,502
202363/BATTERY STORAGE 515,607.10 1,604,031 5,219,455 0 0 515,607 2,119,638 7,339,093 515,607 2,119,638 7,339,093
203 364/POLES,TOWERS&FIXTURES 147,518,313.70 (75,826) 1,173,924 0 0 147,518,314 147,442,487 148,616,411 147,518,314 147,442,487 148,616,411
2043651 OVERHEAD CONDUCTORS&DEVICES SQ339,694.30 (2,546) 1'099,933 0 0 58,339,694 18,337,141 19,437,012 58,339,694 58,337,149 59,437,082
2"366/UNDERGROUND CONDUIT 19,494,289.27 (4,852) 468,344 0 0 194 289 194 9,437 19,957,781 19,4-289 19,489,437 19,957,781
206367/UNDERGROUND CONDUCTORS&DEVICES 106,185,991�89 82,607 3,574,819 0 0 106,185,992 106,266,599 109,843,417 106,185,992 106,268,599 109,843,417
207368/LINE TRANSFORMERS 200,247,530.57 111,457 5,739,011 0 0 200.247,531 200,358,987 206,097,998 200,247,531 200,358,987 206,097,998
208 369l SERVICES 45,534,801.50 9,066 978,886 0 0 45,534,802 45,543,867 46,522,754 45,534,802 45,543,867 46,522,754
209 3701 METERS 38,082,580.08 65,637 2'343,243 0 0 38,082,580 38,148,217 40,491,460 38,082,580 38,148,217 40,491,460
210 371 INSTALLATIONS ON CUSTOMER PREMISES 1,066,419.07 11,390 (59,426) 0 0 1,066,419 1,077,809 1,018,383 1,066,419 1,077,809 1,016,383
211 373/STREET LIGHTING SYSTEMS 951,612.03 3,792 0 0 951,612 955,404 1,'52'662 951,612 955,404 1,852,662
212 TOTAL DISTRIBUTION PLANT 708,696.863.38 1.874,211 25,415,955 0 0 708,696,&63 710,171,075 735,987,029
213
214...TABLE 2-ACCUMULATED PROVISION FOR DEPRECIATION"'
215
216 GENERAL PLANT
217 389/LAND&LAND RIGHTS 0 0 r 0 0 0 0 0 0 0 0 0
218 390/STRUCTURES&IMPROVEMENTS 36,271,090 155,415 1,040,569 0 0 36,271,090 36,426,504 37,467,073 36,271,090 36,426,504 37,467,073
219 391/OFFICE FURNITURE&EQUIPMENT 18,777,006 (123,852) 912,215 0 0 18,777,006 18,653,154 19,565,369 11,777,006 18,653,154 19,565,369
220392/TRANSPORTATION EQUIPMENT 25,286,446 0 1,760,108 0 0 25,286,446 25,286,446 27,046,555 2,,286,446 25,286,446 27,046,555
221 393/STORES EQUIPMENT 11465,091 5,143 218"" 0 0 1,465,091 1,471,235 1,681,739 1 465,091 1,470,235 1,68Q739
222394/TOOLS,SHOP&GARAGE EQUIPMENT 4,941,389 8,136 439,176 0 0 4,941,389 4,949,524 5,388,701 4,941,389 4,949,524 5,386,701
2233951 LABORATORY EQUIPMENT 6,878,913 15,533 412,414 0 0 6,878,913 6,894,447 71306,941 6,878,913 6,8941447 7,306,141
224396/POWER OPERATED EQUIPMENT 5,668A6 0 1,148,778 0 0 5,668,406 5,668,406 61817'185 5,668,406 5,668,406 6,817,18,
225 3971 COMMUNICATIONS EQUIPMENT 33,377,268 64,958 2,849,017 0 0 33,377,268 33,442,226 36,291,244 33,377,268 33,442,226 36,291,244
226 398/MISCELLANEOUS EQUIPMENT 4,378,613 (11,768) 120,148 0 0 4,378,613 4,366,845 4,486,993 41 378.613 4,366,845 4,486,993
2.27 TOTAL GENERAL PLANT 137,044,223 113,565 8,901,011 0 0 137,044,223 137,157,788 146,058,799
228
2.29 UNDER-IOVERALLOCATED SALVAGE 0 0- 0 0 0 0 0 0 0 0
230 TOTAL DEPR BEFORE FAS 143/OTHER 2.095,728.771 2.685,214 88,894,395 0 0 2,095,728,T71 2,098,413,985 2,187,308,379 0 0 0
231
232 FAS 143 ADJ&/OR DISALLOWED COSTS 3,297.393 0 0 0 3,297,393 3,297,393 3,001,094 3,297,393 3.297.393 3.001.094
233 TOTAL ACCUM PROVISION DEPRECIATION 2,099,026,164 2,685,214 88,598,095 0 0 2,099,026,164 2,101,711,378 2,190,309,473 3,297,393 3,297,393 3,001,094
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Case No. IPC-E-24-07
Page 4 of 202
Results of Operations Model

234
235 AMORTIZATION OF OTHER UTILITY PLANT
236 INTANGIBLE PLANT 18,727,740 18,270 0 0 18,721,740 18,141,010 20,202,730 11,121,740 18,746,110 20,202,13:
237 HYDRAULIC PRODUCTION 23,234.782 219,2. 0 0 231234,782 23,454,072 27,392,039 23,234,782 23,454,.72 27,392,03'
238
239 TOTAL AMORT OF OTHER UTILITY PLANT 41,962.522 237,560 5,394,687 0 0 41,962,522 42,200,082 47,594,769
240
241 TOTAL ACCUM PROVISION FOR DEPR
242 &AMORTIZATION OF OTHER UTILITY PLANT 2,140,988,686 2,922,773 93,992,783 2,140,988,686 2,143,911,460 2,237,904,24:
243
244"'TABLE 3-ADDITIONS&DELETIONS TO RATE BASE"'
245
246 NET ELECTRIC PLANT IN SERVICE 4,097,605,828 (2,922,773) 766,373,765 4,045,306,541 4,042,383,768 4,553,479,2C=
247 LESS:
248 252 CUSTOMER ADVANCES FOR CONSTRUCTION
24 POWER SUPPLY 0 0 0 0 0 0 0 0 0 0 0
25 OTHER 0 0 0 0 32,170,424 32,170,424 32,170,424 32,170,424 32,170,424 32,170,424
251 TOTAL CUSTOMER ADV FOR CONSTRUCTION 32,170,424 0 0 0 32,170,424 32,170,424 32,170,424
252
253 ACCUMULATED DEFERRED INCOME TAXES
254 190/ACCUMULATED DEFERRED INCOME TAXES
255 CUSTOMER ADVANCES FOR CONSTRUCTION (3,854,109) 0 0 0 0 (3,854,109) (3,854,109) (3,854,109) (3,854,109) (3,854,109) (3,854,109)
256 OTHER (13,759,745) 0 0 0 0 (13,759,745) (13,759,745) (13,759,745) (13,759,745) (13,759,745) (13,759,745)
257 TOTAL ACCOUNT 190 (17,613,854) 0 0 0 0 (17,613,854) (17,613,854) (17,613,854) (17,613,854) (17,613,854) (17,613,854)
258 281/ACCELERATED AMORTIZATION 0 0 0 0 0 0 0 0 0 0 0
259 282/OTHER PROPERTY 393,362,324 0 0 393,362,324 391,932,337 395,105,792 393,362,324 391,932,337 395,105,792
260 283/OTHER 10,180,872 0 0 0 0 10,180,872 10,180,872 10,180,872 10,180,872 10,180,872 10,180,872
261 TOTAL ACCUM DEFERRED INCOME TAXES 385,929,342 0 3,173,455 (1,429,987) 0 385,929,342 384,499,355 387,672,810
262
263 NET ELECTRIC PLANT IN SERVICE 3,679,506,062 (2,922,773) 763,200,310 1,429,987 0 3,627,206,775 3,625,713,988 4,133,635,970
264 ADD:
265 WORKING CAPITAL
266 151/FUEL INVENTORY 15,316,a 0 0 0 15,316,675 19,716,209 19,716,209 15,316,675 19,716,209 19,716,209
267 154/PLANT MATERIALS&SUPPLIES � 0 0
268 PRODUCTION-GENERAL 14,733,711 0 0 0 0 14,733,716 14,733,716 14,733,716 14,733,716 14,733,716 14,733,716
269 TRANSMISSION-GENERAL 32,918,344 0 0 0 0 32,918,344 32,918,344 32,918,344 32,918,344 32,918,344 32,918,344
270 DISTRIBUTION-GENERAL 67,378,274 0 0 0 0 67,378,274 67,378,274 67,378,274 67,378,274 67,378,274 67,378,274
271 OTHER-UNCLASSIFIED 4,737,661 0 0 0 0 4,737,661 4,737,661 4,737,661 4,737,661 4,737,661 4,737,661
272 TOTAL ACCOUNT 154 119,767,996 0 0 0 0 119,767,996 119,767.996 119,767,996
273 165/PREPAID ITEMS
274 AD VALOREM TAXES 2,682,156 0 0 (2,682,156) 0 2,682,156 0 0 2,682.156 0 0
275 OTHER PROD-RELATED PREPAYMENTS 360,479 0 0 (360,479) 0 360,479 0 0 360,479 0 0
276 INSURANCE 8,059,861 0 0 (8,059,861) 0 8,059,861 0 0 8,059,861 0 0
277 PENSION-RELATED PREPAYMENTS 0 0 0 0 0 0 0 0 0 0 0
278 SOFTWARE CONTRACTS 5,520,067 0 0 (5,520,067) 0 5,520,067 0 0 5,520,067 0 0
279 MISCELLANEOUS PREPAYMENTS 6,087,735 0 0 (6,087,735) 0 6,087,735 0 0 6,087,735 0 0
280 TOTAL ACCOUNT 165 22,710,298 0 0 (22,710,298) 0 22,710.298 0 0
281 WORKING CASH ALLOWANCE 0 0 0 0 0 0 0 0 0 0
282
283 TOTAL WORKING CAPITAL 157,794,969 0 0 (18,310,764) 0 157,794,969 139,484,205 139,484,205
284
285 NET ELECTRIC PLANT IN SERVICE 3,837,301,031 (2,922,773) 763,200,310 (16,880,777) 0 3,785,001,744 3,765,198,193 4,273,120,175
286...TABLE 3-ADDITIONS&DELETIONS TO RATE BASE"'
287
288 NET ELECTRIC PLANT IN SERVICE 3,837,301.031 (2,922,773) 763,200,310 (16.880,777) 0 3,785,001,744 3.765,198,193 4.273,120,175
289 ADD:
290 1051 PLANT HELD FOR FUTURE USE
291 HYDRAULIC PRODUCTION 104,155 0 0 104,155 0 104,155 0 0
292 TRANS LAND&LAND RIGHTS 2,906.703 0 0 0 (2.'.!'3(i.71" 2,906.703 2,906.703 2,906,703 2,906,703 0
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Case No. IPC-E-24-07
Page 5 of 202
Results of Operations Model

293 TRANS STRUCTURES&IMPROVEMENTS 166,669 0 0 (166,669) 0 166,669 0 0 166,669 0 a
294 TRANS STATION EQUIPMENT 32,400 0 0 32,400) 0 32.400 0 0 32,400 0 0
295 DIST LAND&LAND RIGHTS 5,043,035 0 0 0 (5,043,035) 5,043,035 5,043,035 0 5,043,035 5,043,035 a
296 DIST STRUCTURES&IMPROVEMENTS 498,106 0 0� 0 498.106 0 0 498.106 0 0
297 GEN LAND&LAND RIGHTS 0 0 0 0 0 0 0 0 0 0 a
298 GEN STRUCTURES&IMPROVEMENTS 0 0 0 0 0 0 0 0 0 0 0
299 TOTAL PLANT HELD FOR FUTURE USE 8,751,068 0 0 (801,330) (8,751,068) 8,751,068 7,949,738 0
300
301 ELECTRIC PLANT ACQUISITION ADJ-114/5 0 0 0 628,247 628,247 628,247 628,247 628,247 628,247
302
303 DEFERRED PROGRAMS:
304 182/CONSERVATION PROGRAMS
305 IDAHO DEFERRED CONSERVATION PROGRAMS 0 0 0 0 0 0 0 0 0 a
306 OREGON DEFERRED CONSERVATION PROGRAMS 0 0 0 0 0 0 0 0 0 0
307 TOTAL CONSERVATION PROGRAMS 0 0 0 0 0 0 0 0
308 182/MISC.OTHER REGULATORY ASSETS
309 CUB FUND GRANT-OPUC ORDER 15-399 59,7M 0 0 0 0 59,702 59,702 59,702 59,702 59,702 59,702
310 AM.FALLS BOND REFINANCING 72,977 0 0 0 0 72,977 72,977 72,977 72,977 72,977 72,977
311 SFAS 87 CAPITALIZED PENSION-OPUC ORDER 10-064 7,096,835 0 0 0 a 7,096,135 7,016,135 7,096,835 7,096,835 7,096,835 7,096,835
312 CLOUD COMPUTING-IPUC ORDER 34707 1,250,013 0 0 0 1,250,013 1,250,013 1,250,013 1,210,013 1,250,083 1,250,083
313 WILDFIRE MITIGATION-IPUC ORDER 35077 0 0 0 0 26.3%8.227� 0 0 26,678,227 0 0 26,6711,221
314 SIEMENS LTP DEFERRED RATE BASE-IPUC ORDER 33420 8,181,0d 0 0 0 8,181,006 8,181,006 8,181,006 8,1281,006 8,181,006 8,181,006
315 SIEMENS LTP RATE BASE-IPUC ORDER 33420 12,207,705 0 0 0 0 12,207,705 12,207,705 12,207,705 121207,705 12,207,705 12,20],705
316 SIEMENS LTP DEFERRED RATE BASE-OPUC ORDER 15-387 343.307 0 0 0 0 343,307 343,307 343.307 343,307 343,307 343,307
317 SIEMENS LTP RATE BASE-OPUC ORDER 15-387 471,789 0 0 0 0 471,789 471,789 471,789 471,789 471,789 471,789
318 TOTALOTHER REGULATORYASSETS 29,683,405 0 0 0 26,678,227 29,683,405 29,683,405 56,361,632
319 186/MISC.OTHER DEFERRED PROGRAMS 111 0 0 0 0 0 0 0 0 0 0 0
320 254/JIM BRIDGER PLANT END OF LIFE DE PR-OPUC ORDER 12-296 (2,753,872) 0 0 0 0 (2,753,872) (2,753,872) (2,753,872) (2,753,872) (2,753,872) (2,753,872)
321 RECONNECTFEES-OPUC ADV I6-09 (17,468) (17,468) (17,468) (17,468) (17,468) (17,468) (17,468)
322 TOTAL DEFERRED PROGRAMS 26,912,065 0 0 0 26,678,227 29,683,405 26,912,065 53,590,292
323
324 DEVELOPMENT OF IERCO RATE BASE
325 INVESTMENT IN IERCO 18,375,460 0 0 0 0 18,375,460 18,375,460 18,375,460 18,375,460 18,375,460 18,375,460
326 PREPAID COAL ROYALTIES 606,862 0 0 0 0 606,862 606,862 606,862 606,862 606,862 606,862
327 NOTES RECEIVABLE FROM SUBSIDIARY 17,209,739 0 0 0 0 17,209,739 17,209,739 17,209,739 17,209,739 17,209,739 17,209,739
328 TOTAL SUBSIDIARY RATE BASE 36,192,061 0 0 0 0 36,192,061 36,192,061 36,192,061
329
330 TOTAL COMBINED RATE BASE 3,909,784,472 (2,922,773) 763,200,310 (17,682,108) 17,927,159 3,860,256,525 3,836,880,304 4,363,530,71:
331...TABLE 4.OPERATING REVENUES•"
332 OPERATING REVENUES
333 FIRM ENERGY SALES
334 440-448/RETAIL 1,314,173,521 0 0 234,524,216 1,394,973,529 1,049,319,652 1,283,843,868 1,394,973,529 1,049,319,652 1,283,843,868
335 447/FIRM SALES FOR RESALE 0 0 0 0 0 0 0 0 0 0 0
336447/SYSTEM OPPORTUNITY SALES 167,834,037 0 0 (116,098,884) 167,834,037 51,735,153 29,035,180 167,834,037 51,735,153 29,035,180
337 TOTAL SALES OF ELECTRICITY 1,562,807,566 0 0 (461,752,761) 211,824,243 1,562,.07,566 1"011054,805 1,3121879,048
338
339 OTHER OPERATING REVENUES
340 415/MERCHANDISING REVENUES 0 0 0 0 4,655,894 4,655,894 0 4,655,894 4,655,894
341
342 449/OATT TARIFF REFUND
343 NETWORK 0 0 0 0 0 0 0 0 0 0
344 POINT-TO-POINT 0 0 0 0 0 0 0 0 0 0
345 TOTAL ACCOUNT 449 - - - - - 0 0 0
346
347 451/MISCELLANEOUS SERVICE REVENUES 0 0 0 a 5220,513 5,220,513 5,220,513 5,220,513 5,220.513 5,220,513
348
349 454/RENTS FROM ELECTRIC PROPERTY
350 SUBSTATION EQUIPMENT 3272,778 3272,778 3272,778 3272,778 3,272,778 1 212,711
351 TRANSFORMER RENTALS 17,330 17,330 17,330 17,330 1],330 1].330
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 6 of 202
Results of Operations Model

352 LINE RENTALS - 0 0 0 0 0 0 0 0 0 0
353 COGENERATION 1,896,418 0 0 0 0 1,896,418 1,896,418 1,896.418 1,896.418 1.896,418 1,896,418
354 DARK FIBER PROJECT 66,667 0 0 0 0 66,667 66,667 66,667 66,667 66,667 66,667
355 POLE ATTACHMENTS 1,756,476 0 0 0 0 1,756,476 1,756,476 1,756.476 1,756.476 1.756,476 1,756,476
356 FACILITIES CHARGES 10,841,971 0 0 0 0 10,841,971 10,841,971 10,841,971 10,841,971 10,841,971 10,841,971
357 OTHER RENTALS 1,246,139 0 0 0 0 1,246,139 1,246,139 1,246,139 1,246,139 1,246,139 1,246,139
358 WATER LEASE 66,960 0 0 0 0 66,960 66,960 66,960 66,960 66,960 66,960
359 TOTALACCOUNT454 19,164,738 0 0 0 0 19,164,738 19,164,738 19,164,738
360
361 456/OTHER ELECTRIC REVENUES
362 TRANSMISSION-NETWORK SERVICES 10,740,800 0 0 0 0 10,740,800 10,740,800 10,740,800 10,740,800 '0'7:0,800 '0'740,800
363 TRANSMISSION-NETWORK SERVICES-DIST FACILITIES 765,132 0 0 0 0 765,132 765.1 32 765.132 765,132 75,132 765,132
364 TRANSMISSION-POINT-TO-POINT 49,148,205 0 0 0 0 49,148,205 49,148,205 49,148,205 49,148,205 49,148,205 49,148,205
365 ALTERNATE TRANSMISSION SERV.CHG. 0 0 0 0 0 0 0 0 0 0 0
366 PHOTOVOLTAIC STATION SERVICE 0 0 0 0 0 0 0 0 0 0 0
367 DSM RIDER FUNDS 31,947,854 0 0 (31,947,854) 0 31,947,854 0 0 31,947,854 0 0
368 STANDBY SERVICE CHARGE 741,858 0 0 0 0 741,858 741,858 741,858 741,858 741,858 741,858
369 SIERRA PACIFIC USAGE CHARGE 0 0 0 0 0 0 0 0 0 0
370 SPA-OTHER REVENUE 0 0 0 0 0 0 0 0 0 0
371 ANTELOPE 0 0 0 0 0 0 0 0 0 0
372 MISCELLANEOUS 0 0 0 0 8,346 8,346 8,346 8,346 8,3461111111=j
373 TOTAL ACCOUNT 456 93,352,194 0 0 (31,947,854) 0 93,352,194 61,404,340 61,404,340
374 0
375 TOTAL OTHER OPERATING REVENUES 117,737,446 0 0 (27,291,960) 0 0 117,737,446 90,445,486 90,445,486
376
377 TOTAL OPERATING REVENUES 1,680,545,011 0 0 (489,044,721) 211,824.243 0 1,680,545,011 1,191,500,290 1,403,324,534
378...TABLE 5.OPERATION&MAINTENANCE EXPENSES
379
380 STEAM POWER GENERATION
381 OPERATION
382500/SUPERVISION&ENGINEERING 3 0 0 (154,681) (151,022) (147,309) (154,681) (151,022) (147,3G:
383 501/FUEL 95,.332. 0�0 13,003,853 �.180) 95,499,326 108,503,180 65,523,000 95,499,326 108,503,180 65,523,000
384
385 502/STEAM EXPENSES
386 LABOR 0 0jjjjjjj,,,,,,,,, 0 0 0 0 0 0 0 0 0
387 OTHER (2,000) 0 0 0 0 (2,000) (2,000) (2,000) (2,000) (2,000) (2,000)
388 TOTAL ACCOUNT 502 (2,000) 0 0 0 0 (2,000) (2,000) (2000)
389 505/ELECTRIC EXPENSES
390 LABOR 0 0 0 0 0 0 0 0 0 0
391 OTHER (0) 0 0 0 0 (0) (0) (0) (0) (0) (0)
392 TOTAL ACCOUNT 505 (0) 0 0 0 0 (0) (0) (0)
393506/MISCELLANEOUS EXPENSES 5 0 0 5 80 (59) 5 80 (59)
394 507/RENTS 0 0 0 0 0 0 0 0 0 0
395 TOTAL STEAM OPERATION EXPENSES 95,342,650 3,734 3,573 13.003,853 (42,980,180) 95,342,650 108,350,238 65,373,631
396
397 MAINTENANCE
398 510/SUPERVISION&ENGINEERING 0 0 0 (282,132) (282,132) (282,132) (282,132) (282,132) (282,132)
399 511/STRUCTURES 0 0 0 (0) (0) (0) (0) (0) (0)
400 512/BOILER PLANT
401 LABOR 0 0 0 0 0 0 0 0 0
402 OTHER 0 0 0 0 0 0 0 0 0 0 0
403 TOTAL ACCOUNT 512 0 0 0 0 0 0 0
404 513/ELECTRIC PLANT
405 LABOR 0 0 0 0 0 0 0 0 0
406 OTHER 0 0 0 0 0 0 0 0 0 0 0
407 TOTAL ACCOUNT 513 0 0 0 0 0 0 0
408 514/MISCELLANEOUS STEAM PLANT 0 0 0 0 0 0 0 0 0
409 TOTAL STEAM MAINTENANCE EXPENSES (282,131) 0 0 0 0 (282,131) (282,131) (282,131)
410
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 7 of 202
Results of Operations Model

411 TOTAL STEAM GENERATION EXPENSES 95,060,519 3,734 3,573 13,003,853 (42..980,180) 95,060,519 108,068,106 6:_ �00
412
413"'TABLE 5.OPERATION&MAINTENANCE EXPENSES"'
414
415 HYDRAULIC POWER GENERATION
416535/SUPERVISION&ENGINEERING 5,340.529 35,443 0 5,340,529 5,375.972 5,490,907 5,340,529 5.375,972 5490,907
417 536/WATER FOR POWER
418 WATER LEASE 0 0 0 (2,380,597) 0 2,380,597 0 0 2,380,597 0
419 OTHER 3,307,266 7 0 0 3,307,266 3,314,616 3,312,731 3,307,266 3,314,616 3,312,731
420 TOTAL ACCOUNT 536 3,307,266 7,350 (1,885) 2,380,597 (2,380.597) 3,307.266 5,695.213 3,312.731
421
422 537/HYDRAULIC EXPENSES 19,018.910 0 0 19,018,910 19,074,474 19,552,157 19,018,910 19,074,474 19,552,157
423 538/ELECTRIC EXPENSES
424 LABOR 1,659,356 0 0 1,659,356 1,673,365 1,915,562 1,659,356 1,673,365 1,915,562
425 OTHER 513,003 0 0 0 0 513,003 513,003 513,003 513,003 513,003 513,003
426 TOTAL ACCOUNT 538 2,172,360 14,008 242,198 0 0 2,172,360 2,186,368 2,428,565
427
428 539/MISCELLANEOUS EXPENSES 5,528,687 31,521 0 0 5,528,6-7 5,160,208 6,041,716 5,121,617 1,560,201 6,041,761
429 640/RENTS 311,854 0 0 0 311,854 311,854 311,854 311,854 311,854 311,854
430
431 TOTAL HYDRAULIC OPERATION EXPENSES 35,679,606 143,886 1,322,489 2,380,597 (2,380,597) 35,679,606 38,204,089 37,145,98
432
433 MAINTENANCE
434 541/SUPERVISION&ENGINEERING 198,386 1,417 0 0 198,386 199,803 298,844 198,386 199,803 298,844
435 542/STRUCTURES 926 513 4,788 0 0 926,513 931,301 937,125 926,513 931,301 937,125
436 543/RESERVOIRS,DAMS&WATERWAYS 2,272,689 2,542 0 0 2,272,689 2,275,232 2,361,075 2,272,689 2,275,232 2,361,075
437 544/ELECTRIC PLANT
438 LABOR 1,724,170 0 0 1,724,170 1,738,725 1,725,010 1,724,170 1,738,725 1,725,010
439 OTHER 697,230 0 0 0 0 697,230 697,230 697,230 697,230 697,230 697,230
440 TOTAL ACCOUNT 544 2,421,400 14,555 (13,715) 0 0 2,421,400 2,435,955 2,422,240
441
442 545/MISCELLANEOUS HYDRAULIC PLANT 0 0 3,510,965 3,530,095 3,701,651 3,510,965 3,530,095 3,701,651
443
444 TOTAL HYDRAULIC MAINTENANCE EXPENSES 9,329,953 42,434 348,549 0 0 9,329,953 9,372,386 9,720,935
445
446 TOTAL HYDRAULIC GENERATION EXPENSES 45,009,559 186,320 1,671,038 2,380,597 (2,380,597) 45,009,559 47,576,475 46,866,916
447...TABLE 5.OPERATION&MAINTENANCE EXPENSES"'
448 OTHER POWER GENERATION
449 OPERATION
450 546/SUPERVISION&ENGINEERING 655,573 0 655,573 660,492 759,844 655,573 660,492 759,844
451 547/FUEL
452 SALMON DIESEL 16,517 0 0 0 0 16,517 16,517 16,517 16,517 16,517 16,517
453 OTHER 179,888,998 0 0 (14fi,521,436) 86,286,112 179,888,998 33,367,563 119,653,675 179,888,998 33,367,563 119.653,675
454 TOTAL ACCOUNT 547 179,905,516 0 0 (1413,521,436) 86,286,112 179,905,516 33,384,080 119,670,192
455
456 548/GENERATING EXPENSES
457 LABOR 0 0 0 0 29,508 470,542 0 29,508 470,542
458 OTHER 5,285,971 0 0 0 0 5,285,971 5,285,971 5,285,971 5,285,971 5,285,971 5,285,971
459 TOTAL ACCOUNT 548 5,285,971 29,508 441,033 0 0 5,285,971 5,315,480 5,756,513
460
461 549/MISCELLANEOUS EXPENSES 757,159 0 0 757,159 761,346 933,018 757,159 761,346 933,018
462 550/RENTS 0 0 0 0 0 0 0 0 0 0
463
464 TOTAL OTHER POWER OPER EXPENSES 186,604.219 38,614 712,057 (146,521,436) 86,2&6,112 186,604,219 40,121,398 127,119.567
465
466 MAINTENANCE
467 551/SUPERVISION&ENGINEERING 0 0 0 0 0 0 0 0
468 552/STRUCTURES 144,293 404 0 144,293 144,697 148,767 144,293 144,697 148,767
469 553/GENERATING&ELECTRIC PLANT
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 8 of 202
Results of Operations Model

470 LABOR 65,753 0 0 65,753 66,308 71,469 65,753 66,308 71,469
471 OTHER (91,258) 0 0 0 0 (91.258) (91,258) (91,258) (91,258) (91,258) (91,258)
472 TOTAL ACCOUNT 553 (25,50 555 5,162 0 0 (25,505) (24,950) (19,788)
473
474 554/MISCELLANEOUS EXPENSES 5,193,505 4,417- 0 0 5,193,505 5,197,922 5,257,613 5,193,505 5,197,92.2 5,257,613
475 TOTAL OTHER POWER MAINT EXPENSES 5,312,293 5,376 68,923 0 0 5,312,293 5,317,669 5,386,592
476
477 TOTAL OTHER POWER GENERATION EXP 191,916,512 43,990 780,980 (146,521,436) 86,286.112 191,916,512 45,439,067 132,506,159
478
479 OTHER POWER SUPPLY EXPENSE
480 555.0/PURCHASED POWER
481 PURCHASED POWER-TRANS LOSSES 1,096,106 0 0 0 0 1,096,106 1,096,106 1,096,106 1,096,106 1,096,106 1,096,106
482 DEMAND RESPONSE INCENTIVES 10,775,871 0 0 476,394 w(1,012,262) 10,775,871 11,252,265 10,240,003 10,775,871 11,252,265 10,240,003
483 OTHER PURCHASED POWER 279,389,490 0 0 (216,782,897) 36,858,428 279,389,490 62,606,593 99,465,021 279,389,490 62,606,593 99,465,021
484 TOTAL ACCOUNT 555.0 291,261,467 0 0 (216,306,503) 35,846,166 290,165,361 73,858,858 109,705,024
485 555.1/COGENERATION&SMALL POWER PROD
486 CAPACITY RELATED 0 0 0 0 0 0 0 0 0
487 ENERGY RELATED 0 0 (65,365,227)-80,594,886 199,219,096 133,853,869 214,448,755 199,219,096 133,853,869 214 448,755
488 TOTAL COGEN&SMALL POWER PROD 199,219,096 0 0 (65,365,227) 80,594,886 199,219,096 133,853,869 214,448,755
489
490 TOTAL ACCOUNT 555 490 0 0 (281,671,730) 116,441,052 0 489,384,456 207,712,727 324,153,779
491
492 556/LOAD CONTROL&DISPATCHING EXPENSES 0 0 0 0 0 0 0 0 0 0
493 557/OTHER EXPENSES
494 IDAHO POWER COST-RELATED EXPENSES 5,513,655 0 0 1,57',737 0 5,513,655 11,089,392 11,089,392 5,513,655 11,089,392 11,089,392
495 OREGON POWER COST-RELATED EXPENSES 1,371,393 0 0 1,371,393 1,371,393 2,742,786 2,742,786 1,371,393 2,742,786 2,742,786
496 OTHER 2,277,024 J&41,056 589,891 (669,778) 2,277,024 1,648,302 2,238,194 2,277,024 1,648,302 2,238,194
497 TOTAL ACCOUNT 557 9,162,072 41,056 589,891 6,277,352 9,162,072 15,480,480 16,070,371
498
499 TOTAL OTHER POWER SUPPLY EXPENSES 499,642,635 41,056 589,891 (275,394,378) 116,441,052 498,546,529 223,193,207 340,224,150
500
501 TOTAL PRODUCTION EXPENSES 831,629,224 275,101 3,045,482 (406,531,363) 157,366,388 830,533,118 424,276,855 584,688,725
502...TABLE 5-OPERATION&MAINTENANCE EXPENSES"
503
504 TRANSMISSION EXPENSES
505
506 OPERATION
507 560/SUPERVISION&ENGINEERING 31073,109 1%567 0 0 3,073,109 3,092,676 3,095,555 3,073,109 3,092,676 3,095,555
508 561/LOAD DISPATCHING 5,414.644 28,480 0 0 5,414,644 5,443,124 5,982,841 5,414,644 5,443,124 5,982,841
509 562/STATION EXPENSES 2,751,453 16,046 0 0 2,751,453 2,767,498 2,827,336 2,751,453 2,767,498 2,827,336
510 563/OVERHEAD LINE EXPENSES 1,204,912 4,081 0 0 1,204,912 1,208,992 1,307,218 1,204,912 1,208,992 1,307,218
511 565/TRANSMISSION OF ELECTRICITY BY OTHERS 11,050,622 0 (5,594,667) 11,050,622 5,455,955 10,263,139 11,050,622 5,455,955 10,263,139
512 566/MISCELLANEOUS EXPENSES 0 0 0 0 0 0 0 0 0 0
513 567/RENTS 5,051,708 & 0 0 0 5,051,708 5,051,708 5,051,708 5,051,708 5,051,708 5,051,708
514
515 TOTAL TRANSMISSION OPERATION 28,546,447 68,174 700,660 (5,594,667) 4.807,184 28,546,447 23,019,953 28,527,797
516
517 MAINTENANCE
518568/SUPERVISION BENGINEERING 316,322 1,175 64,239 0 0 316,322 317,498 381,737 316,322 317,498 381,737
519 569/STRUCTURES 1,855,729 12,045 38,010 0 0 1,855,729 1,867,774 1,905,784 1,855,729 1,867,774 1,905,784
520 570/STATION EQUIPMENT 3,214,321 22,084 450,722 0 0 3,214,321 3,236,415 3,687,126 3,214,321 3,236,405 3,687,126
521 571/OVERHEAD LINES 1,223,568 8,210 267,008 0 0 1,223,568 1,231,778 1,498,786 1,223,568 1,231,778 1,498,786
522 5731 MISCELLANEOUS PLANT 2,834 10 (2,922) 0 0 2,834 2,844 (78) 2,834 2,844 (78)
523 575/OPER TRANS MKT ADMIN-EIM L 0 0 0 703,023 703,023 703,023 703,023 703,023 703,021
524
525 TOTAL TRANSMISSION MAINTENANCE 7,315,797 43,524 817,057 0 0 7,315,797 7,359,321 8,176,378
526
527 TOTAL TRANSMISSION EXPENSES 35,862,244 111,697 1,517,716 (5,594,667) 4,807,184 35,862,244 30,379,274 36,704,175
528...TABLE 5.OPERATION&MAINTENANCE EXPENSES...
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 9 of 202
Results of Operations Model

529
530 DISTRIBUTION EXPENSES
531
532 OPERATION
533 580/SUPERVISION&ENGINEERING 4,454,785 27,332 401,388 0 0 4,454,785 4,482,117 4,883,505 4,454,785 4,482,117 4,883,505
534 581/LOAD DISPATCHING 5,797,830 40,021 863,231 0 0 5,797,830 5,837,850 6,701,081 5,797,830 5,837,850 6,701,081
535 582/STATION EXPENSES 1,798,005 8,855 98,208 0 0 1,798,005 1,806,860 1,905,068 1,798,005 1,806,860 1,905.068
536 583/OVERHEAD LINE EXPENSES 5,617,399 31,245 207,838 0 0 5,617,399 5,648,644 5,856,482 5,617,399 5,648,644 5,856,482
537 584/UNDERGROUND LINE EXPENSES 5,370,499 13,814 360,490 0 0 5,370,499 5,384,313 5,744,802 5,370,499 5,384,313 5,744.802
538585/STREET LIGHTING&SIGNAL SYSTEMS 4,822 16 (22,299) 0 0 4,822 4.838 (17,461) 4,822 4,838 (17,461)
539 586/METER EXPENSES 6,557,689 40,013 861,859 0 0 6,557,689 6,597,702 7,459,560 6,557,689 6,597,702 7,459,560
540 587/CUSTOMER INSTALLATIONS EXPENSE 1,271,643 7,242 165,988 0 0 1,271,643 1,278,886 1,444.874 1,271,643 1,278,886 1,444,874
541 588/MISCELLANEOUS EXPENSES 4,413,695 25,156 198,869 0 0 4,413,695 4,438,850 4,637,720 4,413,695 4,438,850 4,637,720
542 589/RENTS 639.456 0 0 0 639,456 639,456 639,456 639,456 639,456 639,456
543 TOTAL DISTRIBUTION OPERATION 35,925,822 193,693 3,135,573 0 0 35,925,822 36,119,515 39,255,088
544
545 MAINTENANCE
546 590/SUPERVISION&ENGINEERING 7,280 65 (1,662) 0 0 7,280 7,346 5,664 7,280 7,346 5,684
547 591/STRUCTURES 0 0 0 0 0 0 0 0 0 0
548592/STATION EQUIPMENT 5,071,241 27,616 0 0 5,071.241 5,098,858 5,931.659 5,071.241 5,098,858 5,931,659
549 593/OVERHEAD LINES 17,770,697 45,742 49, 0�15,764,928 17,770,697 17,816,440 34,078,337 17,770,697 17,816,440 34,078,337
550594/UNDERGROUND LINES 707,482 2,626 15,029 0 0 707,482 710,108 725,137 707,482 710,108 725,137
551 595/LINE TRANSFORMERS 64,462 209 381 0 0 64,482 64,692 65,073 64,482 64,692 65,073
552 596/STREET LIGHTING&SIGNAL SYSTEMS 182,003 789 (32,851) 0 0 182,-3 182,792 149,941 182,003 1821792 141,141
553 5971 METERS '84'112 6,496 140,121 0 0 984,112 990,610 1,130,731 984,112 990,6'0 1,130,731
554 598/MISCELLANEOUS PLANT 150,957 * 894 33.559 0 0 150,957 151,851 185,410 150,957 151,851 185,410
555 TOTAL DISTRIBUTION MAINTENANCE 24,938,256 84,440 1,484,347 0 15,764,928 24,938,256 25,022,696 42,271,971
556
557 TOTAL DISTRIBUTION EXPENSES 60,864,077 278,134 4,619,920 0 15,764,928 60,864,077 61,142,211 81,527,059
558
559 CUSTOMER ACCOUNTING EXPENSES
560 901/SUPERVISION 898,226 6,706 In= 0 0 898,226 904,933 11020,032 898,226 904'933 1,020,032
561 902/METER READING 2,122,543 10,639 0 0 2,122,543 2,133,182 2,160,189 2,122,543 2,133,182 2,160,189
562903/CUSTOMER RECORDS&COLLECTIONS 16,141,973 89,293 0 0 16,141,973 16,231,266 17,401,772 16,141,973 16,231,266 17,401,772
563 904/UNCOLLECTIBLE ACCOUNTS 3,830,494 0 0 0 0 3,830,484 3,830,494 31830,484 3,830,484 3,830,484 3,830,484
564905/MISC EXPENSES (358) 0 0 0 0 (358) (358) (358) (358) (358) (358)
565 TOTAL CUSTOMER ACCOUNTING EXPENSES 22,992,868 106,638 1,312,613 0 0 22,992,868 23,099,506 24,412,119
566 CUSTOMER SERVICES&INFORMATION EXPENSES
567 907/SUPERVISION 1,040,924 0 0 1,040,924 1,047,982 1,076,445 1,040,924 1,047,982 1,076,445
568 908/CUSTOMER ASSISTANCE
569 SYSTEM CONSERVATION 312,791 0 0 0 0 312,791 312,791 312,791 312,791 312,791 312,791
570 OTHER 39,515,607 44,254 (31,947,854) 0 39,515,607 7,612,007 8,884,565 39,515,607 7,612,007 8,884,565
571 TOTAL ACCOUNT 908 39,828,398 44,254 1,272,558 (31,947,854) 0 39,828,398 7,924,798 9,197,356
572 909/INFORMATION&INSTRUCTIONAL 282,865 0 0 0 0 282,865 282,865 282.865 282,&65 212,165 282,811
573 910/MISCELLANEOUS EXPENSES 789'281 3,250 1 0 0 789,281 792,530 889,938 789,281 792,'30 889,938
574 TOTAL CUST SERV&INFORMATN EXPENSES 41,941,469 54,561 1,398,429 (31,947,854) 0 41,941,469 10,048,175 11,446,605
575...TABLE 5-OPERATION&MAINTENANCE EXPENSES
576 SALES EXPENSES
577 912/DEMO&SELLING EXPENSES 0 0 0 0 0 0 0 0 0 0 0
578 TOTAL SALES EXPENSES 0 0 0 0 0 0 0 0
579
580 ADMINISTRATIVE&GENERAL EXPENSES
561 920/ADMINISTRATIVE&GENERAL SALARIES 103,642,129 414,139 (19,278,116) 0 103,542,129 94,758,151 92,786,842 103,542,129 84,758,151 92,786,842
582 9211 OFFICE SUPPLIES 16,350,808 3,408 0 0 1 61 350,808 16,354,216 16,584,609 16,350,808 16,354,216 16,584,609
563 92.2/ADMIN&GENERAL EXPENSES TRANSFERRED-CR (42,650,535) 0 0 0 (42,660,535) (42,660,535) (51,999,902) 142,660,535) (42,660,535) (51,999,902)
584923/OUTSIDE SERVICES 10,180,054 0 0 0 0 10,180,054 10,180,054 10,180,054 10,180,054 10,180,054 10,180,054
565 924/PROPERTY INSURANCE
586 PRODUCTION-STEAM 465,139 0 0 0 0 465,139 465,139 465.139 465,139 465,139 465,139
587 ALL RISK&MISCELLANEOUS 2,865E35 0 0 2.865,635 2'869,237 2'935,891 2.865,635 2,869.237 2,935,891
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 10 of 202
Results of Operations Model

588 TOTAL ACCOUNT 924 3,330,773 3,602 66,654 0 3,330,773 3,334,375 3,401,030
589
590925/INJURIES&DAMAGES 4,152,400 1,237 0 8,124,449 4.1,52,400 41153,637 12296,837 4.152,400 4,153,637 12296,837
591 9261 EMPLOYEE PENSIONS&BENEFITS 43,540,293 0 0 0 43,540,293 43,540,293 51,951,225 43,540,293 43,540,293 51,951,225
592 EMPLOYEE PENSIONS&BENEFITS-OREGON 514,677 0 0 0 0 514,677 514,677 514,677 514'677 514,677 514,677
593 EMPLOYEE PENSIONS&BEN EFTS-IDAHO 17,153.713 0 0 0 18,028,665 17,153,713 17,153,713 35,182,378 17,153,713 17,153,713 35,182,378
594 EMPLOYEE PENSIONS&BENEFITS-FERC p p 0 0 0 0 0 0 0 0
595 927/FRANCHISE REQUIREMENTS 0 0 0 0 0 0 0 0 0
596 928/REGULATORY COMMISSION EXPENSES
597 FERC ADMIN ASSESS&SECURITIES
598 CAPACITY RELATED 3,043,871 0 0 0 0 31043,871 3,043,871 31043,871 3,043,871 3,043,871 31043,871
599 ENERGY RELATED 1,044.908 0 0 0 0 1,044.908 1,044.908 1,044.908 1,044.908 1,044,908 1,044,908
600 FERC RATE CASE 0 0 0 0 0 0 0 0 0 0
601 FERC ORDER 472 1,108.26 0 0 0 0 1,108.266 1,108.266 1,108.266 1,108.266 1,108,26 1,101,261
602 FERC OTHER 283,013 0 0 0 0 283,013 283,013 283,013 283,013 283,013 283,a13
603 FERC-OREGON HYDRO FEE 271.717 0 0 0 0 271.717 271.717 271.717 271.717 2711717 271,717
604 SEC EXPENSES 0 0 0 0 0 0 0 0 0 0 0
605 OTHER REGULATORY COMMISSION EXPENSE 24,718 0 0 0 0 24,718 24,718 24,718 24,718 24,718 24,718
606 IDAHO PUC-RATE CASE 0 0 0 0 0 0 0 0 0 0 0
607 -OTHER 48,457 0 0 0 0 48,457 48,457 48,457 48,457 48,457 48,457
608 OREGON PUC-RATE CASE 0 0 0 0 0 0 0 0 0 0 0
609 -OTHER 329,A 0 0 0 0 329,733 329,733 329,733 329,733 329,733 329,733
610 TOTAL ACCOUNT 928 6,154,682 0 0 0 0 6,154,682 6,154,682 6,154,682
611
612 929/DUPLICATE CHARGES 0 0 0 0 0 0 0 0 0 0 0
613 930.1/GENERAL ADVERTISING 36,747 0 0 (36,747) 0 36,747 0 0 36,747 0 0
614 930.21 MISCELLANEOUS EXPENSES 4,432,222 4,432,222 3,994,389 3,387,272 4,432,222 3,994,389 3,387,272
615 931/RENTS 0 0 0 0 0 0 0 0 0 0 0
616 TOTAL ADM&GEN OPERATION 166,727,963 504,058 7,403,878 (19,754,369) 25,558,174 166,727,963 147,47-7,652 180,439,704
617
618935/GENERAL PLANTMAINTENANCE 0 0 8,011,042 8,021,415 8,280,911 8,011,042 8,021,415 8,280,911
619 TOTAL ADMIN&GENERAL EXPENSES 514,432 7,663,374 (19,754,369) 25,558,174 174,739,005 155,499,068 188,720,615
620 174,739,005
621 4161 MERCHANDISING EXPENSE 0 0 0 5,870,784 0 0 5'870,784 5,870,784 0 5,870,784 5,870,794
622 TOTAL OPER&MAINT EXPENSES 1,168,028,887 1,340,562 19,557,535 (457,957,469) 203,496,674 0 1,166,932,781 710,315,874 933,370,082
623
624"'TABLE 6-DEPRECIATION&AMORTIZATION EXPENSE"'
625
626 DEPRECIATION EXPENSE
627 310-316/STEAM PRODUCTION 8,996,341 352,768 0 0 8,916'341 1,349,110 10,241,111 8,996,341 1,341,110 10,241,811
628330-336/HYDRAULIC PRODUCTION 25.320,109 1,107,611 0 0 25,320,109 26p27,920 29,099,413 25,320,109 26,427,920 29,099,413
629340-346/OTHER PRODUCTION-LANGLEY 12,726,801 (357,420) 0 0 12,726,801 12,369,381 12,'59,576 12,726,801 12,369,381 12,559,576
630340-346/OTHER PRODUCTION-DANSKIN/BENNETT MTN 6,587,217 (184,996) 0 0 6,587,217 6,402,222 6,483,109 6,587,217 6,402,22.2 6,483,109
631 TOTAL PRODUCTION PLANT 53,630,468 918,164 3,840,286 0 0 531630,468 54,548,632 58,388,917
632
633 TRANSMISSION PLANT
634 350/LAND&LAND RIGHTS 415,830 1,398 60,621 0 0 415,830 417,228 477,848 415,830 417,228 471,848
635352/STRUCTURES&IMPROVEMENTS 1,937,155 68,953 155,594 0 0 1,937,155 2,006,107 2,161,701 1,937,155 2,006,107 2,161,701
636353/STATION EQUIPMENT 10,218,625 234,763 772,586 0 0 10,218,625 10p53,388 11,225,973 10,218,625 10,453,388 11,225,973
637354/TOWERS&FIXTURES 2,792,927 (2,169) 160,021 0 0 2,792,927 2,790,758 2,950,779 2,792,927 2,790,758 2,950,771
638 355/POLES&FIXTURES 61050,395 170,470 797,742 0 0 6,050,395 6,220,865 71018,607 6,050,395 6,220,865 7,0113,6.7
639 356/OVERHEAD CONDUCTORS&DEVICES 4,005,706 3,296 267,279 0 0 4,005,706 4,009,003 4,276.282 4,005.706 4,009,003 4,276,282
640 359/ROADS&TRAILS 2,693 0 102 0 0 2,693 2,693 2,796 2,693 2,693 2,796
641 TOTAL TRANSMISSION PLANT 25,423.331 476,711 2,213,945 0 0 25,423,331 25,900,042 28,113,987
642
643 DISTRIBUTION PLANT
644 360/LAND&LAND RIGHTS 9r 29, 0 0 29,090 29,091 27,253 29,090 29,091 27,253
645361/STRUCTURES&IMPROVEMENTS 1,326,157 67,824 0 0 1,326,157 1,393,980 1,582,324 1,326,157 1,393,980 1,582,324
646 362/STATION EQUIPMENT 6,333,753 71,089 0 0 6,333,753 6,404,841 6,685,998 6,333,753 6,404,841 6,685,998
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 11 of 202
Results of Operations Model

647 363/BATTERY STORAGE 2,244,322 3,208,062 F- 9,627,639 0 0 2,244,322 5,452,394 15,080,023 2,244,322 5,452,384 15,080,023
647 364/POLES,TOWERS&FIXTURES 6,442,765 (151,653) 516,031 0 0 6,442,765 6,291.112 6,807.143 6,442,765 6.291,112 6,807,143
648 365/OVERHEAD CONDUCTORS&DEVICES 3,587,925 (5,091) 18 0 0 3,587,925 3,582,834 3,769,855 3,587,925 3,582,834 3,769,855
649366/UNDERGROUND CONDUIT 1,306,134 (9,704) 1 0 0 1,306,134 1,296,430 1,424,328 1,306,134 1,296,430 1,424,328
650 367/UNDERGROUND CONDUCTORS&DEVICES 7,626,875 165,213 811, 0 0 7,626,875 7,792,088 8,603,139 7,626,875 7,792,088 8,603,139
651 368/LINE TRANSFORMERS 14,291,908 222,913 1,180,703 0 0 14,291,908 14,514,821 15,695,524 14,291,908 14,514,821 15,695,524
652 369/SERVICES 1,167,405 18,132 6 0 0 1.167,405 1,185,537 1,249,138 1.167,405 1,185,537 1.249.138
653 370/METERS 5,727,122 131,274 31 0 0 5,727,122 5,858,396 61169,537 5,727,122 5,858,396 6,169,53]
654 371/INSTALLATIONS ON CUSTOMER PREMISES 217,333 22,779 51,182 0 0 217,333 240,112 291,294 217,333 240,112 291,294
655 373/STREET LIGHTING SYSTEMS 224,905 7,584 0 0 224'905 232.489 251,969 224.905 232,489 251,969
656 TOTAL DISTRIBUTION PLANT 50,525,692 3,748,42.2 13,363,409 0 0 50,525,692 64,274,115 67,637,523
657...TABLE 6.DEPRECIATION&AMORTIZATION EXPENSE...
658
659 GENERAL PLANT
660 389/LAND&LAND RIGHTS 0 0 0 0 0 0 0 0 0 0
661 390/STRUCTURES&IMPROVEMENTS 3,293,855 310,829 535,348 0 0 3,293,855 3,604,684 4,140,032 3,293,855 3,604,684 4,140,032
662 391/OFFICE FURNITURE&EQUIPMENT 6,891,212 (247,704) 636,073 0 0 6,891,212 6,643,508 7,279'58' 6,891,212 6,643,508 7,279,581
663 392/TRANSPORTATION EQUIPMENT 72,444 0 (66,407) 0 0 72,444 72,444 6,037 72,444 72,444 6,03]
664 393/STORES EQUIPMENT 220,417 10,287 129,334 0 0 220,417 230,703 360,037 220,417 20,703 360,037
665 394/TOOLS,SHOP&GARAGE EQUIPMENT 795,511 16,271 51,369 0 0 795.511 811.782 .63,151 795,511 8:1,782 8631
151
666 395/LABORATORY EQUIPMENT 819,641 31,067 85,142 0 0 819,641 850,707 935,849 819,641 850,707 935,849
667 396/POWER OPERATED EQUIPMENT 0 0 0 0 0 0 0 0 0 0 0
668397/COMMUNICATIONS EQUIPMENT 5,401,103 129,916 328,077 0 0 5,401,103 5,531,019 5,859,096 5,401,103 5,531,019 5,859,096
669398/MISCELLANEOUS EQUIPMENT 798,193 (23,536)� (28,300) 0 0 798,113 774,657 746,357 798,193 774,657 746,357
670 TOTAL GENERAL PLANT 18,292,376 227,131 1,670,634 0 0 18,292,376 18,519,507 20,190,141
671
672 403/BOARDMAN ARO DEPRECIATION EXP 0 0 0 0 0 0 0 0 0
673 DEPR EXP BEFORE DISALLOWED COSTS 147,871.867 5.370,428 21,088,273 0 0 147,871,867 153,242,295 174,330,569
674
675 DEPRECIATION ON DISALLOWED COSTS 0 0 (296,299) (296,299) (296,299) (296.299) (296,299) (296,299)
676 TOTAL DEPRECIATION EXPENSE 147,575,568 5,370,428 21,088,273 0 0 147,575,568 152,945,996 174,034,269
677
678 AMORTIZATION EXPENSE
679 INTANGIBLE PLANT 6,193,955 475,119 0 0 6,193,955 6,669,074 6,975,364 6,193,955 6,669,074 6,975,364
680 HYDRAULIC PRODUCTION 0 0 0 0 0 0 1,959,025 0 0 1,959025
681 ADJUSTMENTS,GAINS&LOSSES (754,081) 0 0 (754,081) 15,018 15,018 (754,081) 15,018 15,018
682 TOTAL AMORTIZATION EXPENSE 5,439,874 475,119 2,265,315 769,099 0 5,439,874 6,684,092 8,949,407
683
684 TOTAL DEPRECIATION&AMORTIZATION EXP 153,015,442 5,845,647 23,353,588 769,099 0 153,015,442 159,630,088 182,983,676
685
686 411.093/4/ARO ACCRETION EXPENSE 0 0 0 0 12,995 12,995 12,995 12,995 12,995 12,995
687
688"'TABLE 7-TAXES OTHER THAN INCOME TAXES"'
689
690 TAXES OTHER THAN INCOME
691 FEDERALTAXES
692 FICA 20,013,326 0 0 (20,013,326) 20,013,326 0 0 20,013,326 0 0
693 FUTA 94,181 0 0 (94,181) 94,181 0 0 94,181 0 0
694 LESS PAYROLL DEDUCTION (20,385,033) 0 0 20,385,033 (20,385,033) 0 0 120,385,033) 0 0
695
696 STATE TAXES
697 AD VALOREM TAXES
698 JIM BRIDGER STATION 1,310,444 0 0 0 0 1,310,444 1,310,444 1,310,444 1,310,444 1,310,444 1,310,444
699 VALMY 279.802 0 0 0 0 279.802 279.802 279.802 279.802 279,802 279,802
700 BOARDMAN 0 0 0 0 0 0 0 0 0 0 0
701 OTHER-PRODUCTION PLANT 5,023,123 0 0 0 0 5,023,123 5,023,123 5,023,123 5,023,123 5,023,123 5,023,123
702 OTHER-TRANSMISSION PLANT 5,094,471 0 0 0 0 5,094,471 5,094,471 51094,471 51094,471 5,094,471 5,094,471
703 OTHER-DISTRIBUTION PLANT 6,775,452 0 0 0 0 6,775.452 6,775,452 6,775.452 6,775.452 6,775,452 6,775,452
704 OTHER-GENERAL PLANT 1,071,005 0 0 0 0 1,071,005 1,071,005 1,071,005 1,071,005 1,071,005 1,071,005
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 12 of 202
Results of Operations Model

705 SUB-TOTAL 19,554,298 0 0j 19,554298 19,554,298 19,554,298
706
707 LICENSES-HYDRO PROJECTS 4,376 0 0 0 0 4,376 4,376 4,376 4,376 4,376 4,376
708
709 REGULATORY COMMISSION FEES
710 STATE OF IDAHO 2,837,473 0 0 0 0 2,837.473 2,837.473 2,837,473 2,837.473 2.837,473 2,837,473
711 STATE OF OREGON 260,575 0 0 c 0 260,575 260,575 260,575 260,575 260,575 260,575
712
713 FRANCHISE TAXES
714 STATE OF OREGON 944,305 0 0 0 944,305 944,305 944,305 944,305 944,305 944,305
715
716 OTHER STATE TAXES
717 UNEMPLOYMENT TAXES 277,525 0 0 277,525 0 277,525 0 0
718 HYDRO GENERATION KWH TAX 1,273,632 0 0 385,932 1,273,632 1,659,564 1,659,564 1,273,632 1,659,564 1,659,564
719 IRRIGATION-PIC 207,265 0 0 86,306 207,265 293,571 293,571 207,265 293,571 293,571
720
721 CANADA EST TAXES 0 0 0 0 0 0 0 0 0
722
723 TOTAL TAXES OTHER THAN INCOME 25,081,924 0 0 25,081,924 25,554,161 25,554..161
724
725
726"`TABLE 8-REGULA TORY DEBITS7CREDITS`..
727 REGULATORY DEBITS/CREDITS
728 STATE OF IDAHO 0 0 1,528,-5 1,528,445 5,339,621 1,528,445 1,528,445 5,339,621
729 STATE OF OREGON 0 0 0 317,709 317,709 317,709 317,709 317,709 317,709
730
731 TOTAL REGULATORY DEBITS/CREDITS 1,846,154 0 0 11,175 1,846,154 1,846,154 5,657,329 1,846,154 1,846,154 5,657,329
732
733
734"`TABLE 9-INCOME TAXES
735
736 410/411 NET PROVISION FOR DEFERRED INCOME TAXES
737 ACCOUNT#282-RELATED or (29,254,092) 0 (29,254,092) (15,940,296) (12,766,841) (29,254,092) (15,940,296) (12,766,841)
738 ACCOUNTS#190 8#283-RELATED 11,548,518 0 0 (14,205,710) 11,548,518 (2,657,192) (2,657,192) 11,548,518 (2,657,192) (2,657,192)
739 TOTAL NET PROVISION FOR DEFERRED INCOME TAXES (17,705,575) 0 3,173,455 (891,913) (17,705,575) (18,597,487) (15,424,032) 117,705,576) (18,597,487) (15,424,032)
740
741 411.4-INVESTMENT TAX CREDIT ADJUSTMENT 50,193,136 0 0 50,193,136 50,193,136 124,171,136 50,193,136 50,193,136 124,171A1
742
743 SUMMARY OF INCOME TAXES
744
745 TOTAL FEDERAL INCOME TAX (16,113,562) (1,418,538) 2,862,852 (5,325,230) 1,091,560 (16,113.562) (22,857,330) (18,902,918)
746
747 STATE INCOME TAX
748 STATE OF IDAHO 230,568 (402,422) (3,237,358) (7,731,824) 309,662 230,568 (7,903,678) (10,831,374)
749 STATE OF OREGON 725,216 (21,558) (173,430) (145,939) 16,589 725,216 557,719 400,878
750 OTHER STATES (21,626) (7,186) (57,810) (48,646) 5,530 (21,626) (77,459) (129,739)
751 TOTAL STATE INCOME TAXES 934,158 (431,167) (3,468,598) (7,926,409) 331,781 934,158 (7,423,417) (10.560,234)
752••`TABLE 10-CALCULATION OF FEDERAL INCOME TAX
753
754 OPERATING REVENUES 1,680,545,011 0 0 (489,044,721) 211,824,243 1 680,545,011 1,191,500,290 1,403,324,534
755
756 OPERATING EXPENSES
757 OPERATION 8 MAINTENANCE 1,168,028,887 1,340,562 19,557,535 (457.957,469) 203,496.674 1.168,028.887 711,411.980 934,466.188
758 DEPRECIATION EXPENSE 147,575,568 5,370,428 21,088,273 0 0 147,575,568 152,945,996 174,034,269
759 AMORTIZATION OF LIMITED TERM PLANT 5,439,874 475,119 2.265,315 769,099 0 5,439.874 6,684.092 8,949.407
760 ACCRETION EXPENSE 12,995 0 0 0 0 12,995 12,995 12,995
761 TAXES OTHER THAN INCOME 25,081,924 0 0 472,238 0 25,081.924 25,554.161 25,554,161
762 REGULATORY DEBITS/CREDITS 1,846,154 0 0 0 3,811,175 1,846,154 1,846,154 5,657,329
763 TOTAL OPERATING EXPENSES 1,347,985.401 7.186,109 42.911,123 (456.716,133) 207,307.849 1.347,985.401 898,455,377 1.148,674.349
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 13 of 202
Results of Operations Model

764
765 BOOK-TAX ADJUSTMENT 0 0 0 0 0 0 0 0
766
767 INCOME BEFORE TAX ADJUSTMENTS 332,559.611 (7,186,109) (42,911,123) (32,328,589) 4,516,394 332,559.611 293,044.913 254,650,184
768
769 INCOME STATEMENT ADJUSTMENTS
770 LONG TERM DEBT INTEREST EXPENSE W6.216296 0 0 116.216.296 137,657,281 136,643,988 116,216,296 137,657,281 136.643.98:
771 OTHER INTEREST EXPENSE 19,913.023 0 0 0 0 19,913,023 19,913,023 19,913,023 19,913,023 19,913,023 19,913,02,
772 TOTAL INTEREST CHARGES 136,129,319 0 0 21,440,985 (1,013,293) 136,129,319 157,570,305 156,557,011
773
774 NET OPERATING INCOME BEFORE TAXES 196,430,291 (7,186,109) (42,911,123) (53,769,574) 5,529,687 196,430,291 135,474,608 98,093,173
775
776 ALLOWANCE FOR AFUDC �63,233,6� 0 0 (63,233,684) 0 63,233,684 0 0 63,233,684 0
777
778 FEDERAL INCOME TAX ADJUSTMENTS-PLANT (37,229,713) 0 (14,898,848) 0 (37.229,713) (23,762,778) (38,661,626) 137.229,713) (23,762,778) (38,661,626)
779 FEDERAL INCOME TAX ADJUSTMENTS-OTHER (59,917) 0 0 2 7783,462 0 (59.917) 23,723,545 23,723,545 (59,917) 23,723,545 23,723,545
780 FEDERAL INCOME TAX ADJUSTMENTS-TOTAL (37,289,630) 0 (14,898,848) 37,250,397 0 (37,289,630) (39,233) (14,938,081) (37,289,630) (39,233) (14,938,081)
FEDERAL GENERAL BUSINESS CREDITS 0 0 67.974,000 0 0 0 0 67,974,000 0 0 67,974,000
781
782 NET OPER INCOME BEFORE STATE INCOME TAXES 222,374.345 (7,186,109) 10.164,029 (79.752,861) 5,529.687 222,374.345 135,435,376 83,155.092
783
784 TOTAL STATE INCOME TAXES(ALLOWED) 6,685,045 (431,167) (3,468,598) (9,792,805) 331,781 6,685,045 (3,538,926) (6,675,743)
785
786 TOTAL FEDERAL TAXABLE INCOME 215,689,301 (6,754,942) 13,632,627 (69,960,056) 5,197,906 215,689,301 138,974,302 89,830,836
787
788 FEDERAL TAX AT 21 PERCENT 45,294,753 (1,418,538) 2,862,852 (14,691,612) 1,091,560 45,294,753 29,184,603 18,864,47n
789 OTHER CURRENT TAX ADJUSTMENTS 0 0 0 0 (42,231,900) (42,231,900) (42,231,900) (42,231,900) (42,231,900) (42,231,9'.
790 PRIOR YEAR TAX ADJUSTMENT 0 0 9,388,381 0 (19,176,415) (9,810,034) (9,810,034) (19,176,415) (9,810,034) (9,810.0_
791
792 TOTAL FEDERAL INCOME TAX (16,113,562) (1,418,538) 2A62,852 (5,325,230) 1,091,560 (16,113,562) (22,857,330) (33,1T7,458)
793"•TABLE 11-OREGON STATE INCOME TAXES"' 32,389,001 0 30,071,475
794
795 NET OPERATING INCOME BEFORE TAXES-OREGON 196,430,291 (7,186,109) (42,911,123) (53,769,574) 5,529,687 196,430,291 135,474,608 98,093,173
796
797 ALLOWANCE FOR AFUDC 63,233,684 0 0 (63,233,684) 0 63,233,684 0 0 63,233,684 0 0
798
799 STATE INCOME TAX ADJUSTMENTS-PLANT (37,229,713) 0 (14,898,848) 13,466,935 0 (37,229,713) (23,762,778) (38,661,626) (37,229,713) (23,762,778) (38,661,626)
800 STATE INCOME TAX ADJUSTMENTS-OTHER (59,917) 0 0 23,783,462 0 (59,917) 23,723,545 23,723,545 (59,917) 23,723,545 23,723,545
801 TOTAL STATE INCOME TAX ADJUSTMENTS (37,289,630) 0 (14,898,848) 37,250,397 0 (37,289,630) (39,233) (14,938,081) (37,289,630) (39,233) (14,938,081)
802 ADD:MFG DEDUCTION NOT ALLOWED 0�i 0 0 0 0 0 0 0 0
803
804 TOTAL STATE INCOME TAX ADJUSTMENTS-OREGON 25,944,054 0 (14,898,948) (25,983,287) 0 25,944,054 (39,233) (14,938,081)
805
806 INCOME SUBJECT TO OREGON TAX 222,374,345 (7,186,109) (57,809,971) (79,752,861) 5,529,687 222,374,345 135,435,376 83,155,092
807
808 IERCO TAXABLE INCOME 13,361,504 0 0 0 13,361,504 13,361,504 13,361,504 13,361,504 13,361,504 13,361,504
809 BONUS DEPRECIATION ADJUSTMENT (6,823,240) 0 0 0 (6,823,240) (6,823,240) (6,823,240) (6,823,240) (6,823,240) (6,823,240)
810 FEDERAL NOL 0 0 0 0 0 0 0 0 0 0
811 TOTAL STATE TAXABLE INCOME-OREGON 228,912,609 (7,186,109) (57,809,971) (79,752,861) 5,529.687 228,912.609 141,973,640 89,693.356
812 APPORTIONMENT FACTOR(0.45454550) 10,405,120 (326,641) (2,627,726) (3,625,130) 251,349 10,405,120 6,453,348 4,076,971
813 POST APPORTIONMENT M ITEMS 0 0 0 0 0 0 0 0 0 0
814 TOTAL TAXABLE INCOME-OREGON 10,405,120 (326,641) (2,627,726) (3,625,130) 251,349 10,405,120 6,453,348 4,076,971 10,405,120 6,453,348 4,076,971
815
816 OREGON TAX AT 6.60%PERCENT 686,738 (21,558) (173,430) (239,259) 16,589 686,738 425,921 269,080
817 LESS:INVESTMENT TAX CREDIT 0 0 0 0 0 0 0 0 0 0
818
819 STATE INCOME TAX ALLOWED-OREGON 686,738 (21,558) (173,430) (239,259) 16,589 686.738 425,921 269.080
820 ADD:OR CAT TAX 282,224 0 0 0 282,224 282,224 282,224 282,224 282,224 282,224
821 PRIOR VEARS'TAX ADJUSTMENT (243,746) 0 0 0 (243,746) (150,426) (150,426) (243,746) (150,426) (150,426)
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 14 of 202
Results of Operations Model

822
823 STATE INCOME TAX PAID-OREGON 725.216 (21,558) (173,430) (145,939) 725.216 557.719
824
825...TABLE 12-IDAHO STATE INCOME TAXES"""
826
827 NET OPERATING INCOME BEFORE TAXES-IDAHO 196,430,291 (7,186,109) (42,911,123) (53,769,574) 5,529,687 196,430,291 135,474,608 98,093,1, 196,430,291 135.474,608 98,093,173
828
829 ALLOWANCE FOR AFUDC 63,233.684 0 0 (63,233,684) 0 63,233.684 0 0 63,233,684 0 0
830
831 STATE INCOME TAX ADJUSTMENTS-PLANT (37,229,713) 0 (14.898,848) 13.466,935 0 (37,229.713) (23,762.778) (38,661,626) (37,229.713) (23.762,778) (38,661,626)
832 STATE INCOME TAX ADJUSTMENTS-OTHER (59,917) 0 0 23,783,462 0 (59,917) 23,723,545 23,723,545 (59,917) 23,723,545 23,723,545
833 STATE INCOME TAX ADJUSTMENTS (37,289,630) 0 (14,898,848) 37,250,397 0 (37,289.630) (39.233) (14,938,081) (37,289,630) (39,233) (14,938,081,
834
835 INCOME SUBJECT TO IDAHO TAX 222,374,345 (7,186,109) (57,&09,971) (79,752,861) 5,529,687 222,374,345 135,435,376 83,155,092
836
837 IERCO TAXABLE INCOME 13,361,504 0 0 0 13,361.504 13,361,504 13,361,504 13,361,504 13,361,504 13,361,504
838 BONUS DEPRECIATION ADJUSTMENT (42,661,135) 0 0 0 (42,661,135) (42,661,135) (42,661,135) (42,661,135) (42,661,135) (42,661,135)
839 FEDERAL NOL 0 0 0 0 0 0 0 0 0
840 TOTAL STATE TAXABLE INCOME-IDAHO 193,074,714 (7,186,109) (57,809,971) (79,752,861) 5,529,687 193,074,714 106,135,745 53,855,461
841
842 IDAHO TAX AT 5.6 PERCENT 10,812,184 (402,422) (3,237,358) (4,466,160) 309,662 10,812,184 5,943,602 3,015,906
843 LESS:INVESTMENT TAX CREDIT 0 0 0 5,049,613 10,057,246 10,057,246 5,049,613 10,057,246 1I
844
845 STATE INCOME TAX ALLOWED-IDAHO 5,762,571 (402,422) (3,237,358) (9,473,793) 309,662 5,762,571 (4,113,644) (7,041,340)
846 ADD:FIN 48 ADJUSTMENT 0 0 0 0 0 0 0 0 0 0
847 PRIOR YEARS'TAX ADJUSTMENT (5,532,003) 0 0 1,741,969 0 (5,532,003) (3,790,034) (3,790,034) (5,532,003) (3,790,034) �.
848 STATE INCOME TAX PAID-IDAHO 230,568 (402,422) (3,237,358) (7,731,824) 309,662 230,568 (7,903,678) (10,831,374)
849
850
851 OTHER STATES'INCOME TAX
852 INCOME SUBJECT TO TAX 222,374,345 (7,186,109) (57,809,971) (79,752,861) 5,529,687 222,374,345 135,435,376 83,155,092
853
854 IERCO TAXABLE INCOME 13,361,504 0 0 0 13,361,504 13,361,504 13,361,504 13,361,504 13,361,504 13.361,504
856 FBONUSEDER DEPRECIATION ADJUSTMENT 0 0 0 0 0 0 0 0 0
85 FEDERAL NOL 0 0 0 0 0 0 0 0 0
857 TOTAL TAXABLE INCOME BEFORE APPORTIONMENT-OTHER STATES 235,735,849 (7,186,109) (57,809,971) (79,752,861) 5,529,687 235,735,849 148,796,880 96,516,596
858 POST APPORTIONMENT M ITEMS 0 0 0 0 0 0 0 0 0 0
859 TOTAL TAXABLE INCOME-OTHER STATES 235,735,849 (7,186,109) (57,809,971) (79,752,861) 5,529,687 235,735,849 148,796,880 96,516,596
860
861 OTHER TAX AT 0.1 PERCENT 235,736 (7,186) (57,810) (79,753) 5,530 235,736 148,797 96,517
862 ADD:FIN48ADJUSTMENT mmm==" 0 0 0 0 0 0 0 0 0
863 PRIOR YEARS'TAX ADJUSTMENT (257,362) 0 0 0 (257,362) (226,255) (226,255) (257,362) (226,255) (226,255)
864 OTHER STATES'INCOME TAX PAID (21,626) (7,186) (57,810) (48,646) 5,530 (21,626) (T7,459) (129,739)
865..`TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR...
866 STEAM POWER GENERATION
867 500-513/TOTAL STEAM GENERATION 0 0 0 0 442,341 442,341 442,341 442,341 442,341 442,341
868 HYDRAULIC POWER GENERATION
869 535/SUPERVISION&ENGINEERING 4,198,454 0 0 0 0 4,198,454 4,198,454 4,198,454 4,198,454 4,198,454 4,198,454
870 536/WATER FOR POWER 870,626 0 0 0 0 870,626 870,626 870,626 870,626 870,626 870,626
871 537/HYDRAULIC EXPENSES 6,581,987 0 0 0 0 6,581,987 6,581,987 6,581,987 6,581,987 6,581,987 6,581,987
872 538/ELECTRIC EXPENSES 1,659.356 0 0 0 0 1,659,356 1,659,356 1,659.356 1,659,356 1,659,356 1,669,356
873 539/MISCELLANEOUS EXPENSES 3,733,853 0 0 0 0 3,733,853 3,733,853 3,733,853 3,733,853 3,733,853 3,733,853
874 540/RENTS 0 0 0 0 0 0 0 0 0 0 0
875 TOTAL HYDRAULIC OPERATION EXPENSES 17,044,277 0 0 0 0 17,044,277 17,044,277 17,044,277
876 541/SUPERVISION&ENGINEERING 167.910 0 0 0 0 167,910 167,910 167,910 167,910 167,910 167,910
877 542/STRUCTURES 567,222 0 0 0 0 567,222 567,222 567,222 567,222 567,222 567,212
8785431 RESERVOIRS,DAMS&WATERWAYS 301.175 0 0 0 0 301,175 301,175 301,175 301,175 301,175 301,175
879 544/ELECTRIC PLANT 1,724,170 0 0 0 0 1,724,170 1,724,170 1,724,170 1,724,170 1,724,170 1,724,170
880 645/MISCELLANEOUS HYDRAULIC PLANT 2,266,086 0 0 0 0 2,266,086 2,266,086 2,266,086 2,266,086 2,266,086 2,266,086
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 15 of 202
Results of Operations Model

881 TOTAL HYDRAULIC MAINTENANCE EXPENSES 5,026,564 0 0 0 0 5,026,564 5,026,564 5,026,564
882 TOTAL HYDRAULIC GENERATION EXPENSES 22,070,840 0 0 0 0 22,070,840 22,070,840 22,070,840
883 OTHER POWER GENERATION
884 546/SUPERVISION&ENGINEERING 582.511 0 0 0 0 582.577 582.577 582,577 582,577 582,577 582,577
885 648/GENERATING EXPENSES 0 0 0 0 0 0 0 0 0 0 0
886 549/MISCELLANEOUS EXPENSES 3,495,474 0 0 0 0 3,495,474 3,495,474 3,495,474 3,495,474 3,495,474 3,495,474
887 550/RENTS 496,069 0 0 0 0 496,069 496,069 496,069 496,069 496,069 496.069
888 TOTAL OTHER POWER OPER EXPENSES 4,574,120 0 0 0 0 4,574,120 4,574,120 4,574,120
889
890 551/SUPERVISION&ENGINEERING 0 0 0 0 0 0 0 0 0 0 0
891 552/STRUCTURES 47,812 0 0 0 0 47,812 47,812 47,812 47,812 47,812 47,812
892 553/GENERATING&ELECTRIC PLANT 65,753 0 0 0 0 65,753 65,753 65,753 65,753 65,753 65,753
893 554/MISCELLANEOUS EXPENSES 523,281 0 0 0 0 523,281 523,281 523,281 523,281 523,281 523,281
894 TOTAL OTHER POWER MAINT EXPENSES 636,845 0 0 0 0 636,845 636,845 636,845
895 TOTAL OTHER POWER GENERATION EXP 5,210,965 0 0 0 0 5,210,965 5,210,965 5,210,965
896 555/PURCHASE POWER 0 0 0 0 0 0 0 0 0 0
897 556/LOAD CONTROL&DISPATCHING EXPENSES 0 0 0 0 0 0 0 0 0 0
898 557/OTHER EXPENSES 4,863.381 0 0 0 0 4,863,381 4,863,381 4,863.381 4,863.381 4,863,381 4,863,381
899 TOTAL OTHER POWER SUPPLY EXPENSES 4,863,381 0 0 0 0 4,863,381 4,863,381 4,863,381
900
901 TOTAL PRODUCTION EXPENSES 32,587,528 0 0 0 0 32,587,528 32,587,528 32,587,528
902
903"'TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR"`
904
905 TRANSMISSION EXPENSES
906 560/SUPERVISION&ENGINEERING 2,317.807 0 0 0 0 2,317,807 2,317,807 2,317.807 2,317.807 2.317,807 2,317,807
907 561/LOAD DISPATCHING 3,373,689 0 0 0 0 3,373,689 3,373,68' 31373'689 31373,689 3'373,689 3,373,689
908562/STATION EXPENSES 1'900,727 0 0 0 0 1,900,727 1,900,727 1,9W.727 1,900,727 1,900,727 1,900,727
909 563/OVERHEAD LINE EXPENSES 483,392 0 0 0 0 483,392 483,392 483,392 483,392 483,392 483,392
910 565/TRANSMISSION OF ELECTRICITY BY OTHERS 0 0 0 0 0 0 0 0 0 0 0
911 566/MISCELLANEOUS EXPENSES 4 0 0 0 0 0 0 0 0 0 0
912 567/RENTS 0 0 0 0 0 0 0 0 0 0 0
913 TOTAL TRANSMISSION OPERATION 8,075,615 0 0 0 0 8,075,615 8,075,615 8,075,615
914 568/SUPERVISION&ENGINEERING 139,203 0 0 0 0 139,203 139,203 139,203 139,203 139,203 131,213
915569/STRUCTURES 1,426,838 0 0 0 0 1,426,838 1,426,838 1,426,838 1,421,838 1,426,838 1,426,838
916 570/STATION EQUIPMENT 2,616,011 0 0 0 0 2,616,011 2,616,011 2,616.011 2,616.011 2,61 61 011
2,616,011
917 571/OVERHEAD LINES 972,477 0 0 0 0 972,477 972,477 972,477 972,477 972,477 972,477
9185751 OPER TRANS MKT ADMIN-EIM 1,155 0 0 0 0 1,155 1,155 1,155 1,155 1,155 1,155
919 TOTAL TRANSMISSION MAINTENANCE 5,155,684 0 0 0 0 51155,684 5,155,684 5,155,684
920 TOTAL TRANSMISSION EXPENSES 13,231,299 0 0 0 0 13,231,299 13,231,299 13,231,299
921
922 DISTRIBUTION EXPENESES
923 580/SUPERVISION&ENGINEERING 3,237,656 0 0 0 0 3,237,656 3,237,656 31237,656 3,237,656 3,237,656 3,237,656
924 581/LOAD DISPATCHING 4,740,713 0 0 0 0 41740,713 4,740.713 4,740.713 41740.713 4,740,713 4,740,713
925 582/STATION EXPENSES 1,048,893 0 0 0 0 1,048,893 1,041,813 1,048,893 1,048,893 1,048,893 1,048,893
926583/OVERHEAD LINE EXPENSES 3,701,154 0 0 0 0 3,701,154 3,701,154 3,701.154 3,701.154 3,701,154 3,701,114
927 584/UNDERGROUND LINE EXPENSES 1,636,360 0 0 0 0 1,636,360 1,636,360 1,636,360 1,636,360 1,636,16' 1,131,110
928 585/STREET LIGHTING&SIGNAL SYSTEMS 1,916 0 0 0 0 1,916 1,916 1,916 1,916 1,916 1,916
929 586/METER EXPENSES 4,739,824 0 0 0 0 4,739,824 4,739,824 4,739,824 4,739,824 4,739.824 4,739,824
930 587/CUSTOMER INSTALLATIONS EXPENSE 857,913 0 0 0 0 857,913 857,913 857,913 857,913 857,913 857,913
931 588/MISCELLANEOUS EXPENSES 2,979,865 0 0 0 0 2,979,865 2,979,865 2,979,865 2,979,865 2,979,865 2,979,865
932 589/RENTS 0 0 0 0 0 0 0 0 0 0 0
933 TOTAL DISTRIBUTION OPERATION 22,944,293 0 0 0 0 22,944,293 22,944,293 22,944,293
934...TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
935
936
937 590/SUPERVISION&ENGINEERING 7,755 0 9 0 0 7,755 7,755 7,755 7,755 71755 755
938 591/STRUCTURES 0 0 0 0 0 0 0 0 0 0 0
939 592/STATION EQUIPMENT 3,271,354 0 0 0 0 3,271,354 3,271,354 3,271,354 3,271,354 3,271,3M 3,271,354
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 16 of 202
Results of Operations Model

940 5931 OVERHEAD LINES 5,418,492 0 0 0 0 5,418,492 5,418,492 5,418,492 5,418,492 5,418,492 5,418,492
941 5941 UNDERGROUND LINES 311,063 0 0 0 0 311,063 311,063 311,063 311,063 311,063 311,063
942 595/LINE TRANSFORMERS 24,796 0 0 0 0 24,796 24,796 24,796 24,796 24,796 24,796
943 596/STREET LIGHTING&SIGNAL SYSTEMS 93,462 0 0 0 0 93,462 93,462 93,462 93.462 93,462 93,462
944 5971 METERS 769,699 0 0 0 0 769,699 769,699 769,699 769,699 769,699 769,699
945 598/MISCELLANEOUS PLANT 105,914 0 0 0 0 105,914 105,914 105,914 105,914 105,914 105,914
946 TOTAL DISTRIBUTION MAINTENANCE 10,002,534 0 0 0 0 10,002,534 10,002,534 10,002,534
947 TOTAL DISTRIBUTION EXPENSES 32,946,827 0 0 0 0 32,946,827 32,946,827 32,946,827
948
949 CUSTOMER ACCOUNTING EXPENSES
950 901/SUPERVISION 794,380 0 0 0 0 794,380 794,380 794,380 794,380 794,380 794,380
951 902/METER READING 1,260,207 0 0 0 0 1,260,207 1,260,207 1,260,207 1,260,207 1,260,207 1,260,207
952 903/CUSTOMER RECORDS&COLLECTIONS 10,677,395 0 0 0 0 10,577,395 10,577,395 10,577,395 10,577,395 10,577,395 10,577,395
953 904/UNCOLLECTIBLE ACCOUNTS 0 0 0 0 0 0 0 0 0 0 0
954905/MISC EXPENSES 0 0 0 0 0 0 0 0 0 0 0
955 TOTAL CUSTOMER ACCOUNTING EXPENSES 12,631,982 0 0 0 0 12,631,982 12,631,982 12,631,982
956
957 CUSTOMER SERVICES&INFORMATION EXPENSES
958 907/SUPERVISION 836,042 0 0 0 0 836,042 836,042 836,042 836,042 836,042 836,042
959908/CUSTOMER ASSISTANCE 5,242,141 0 0 0 0 5,242,141 5,242,141 5,242,141 5,242,141 5,242,141 5,242,141
960 909/INFORMATION&INSTRUCTIONAL 0 0 0 0 0 0 0 0 0 0 0
961 910/MISCELLANEOUS EXPENSES 384,926 0 0 0 0 384,926 384,926 384,926 384,926 384,926 384,926
962 TOTAL CUST SERV&INFORMATN EXPENSES 6,463,109 0 0 0 0 6,463,109 6,463,109 6,463,109
963
964 SALES EXPENSES
965 912/DEMO&SELLING EXPENSES 0 0 0 0 0 0 0 0 0 0
966 TOTAL SALES EXPENSES 0 0 0 0 0 0 0 0 0
967"`TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
968
969 ADMINISTRATIVE&GENERAL EXPENSES
970 920/ADMINISTRATIVE&GENERAL SALARIES 58,534,0� 0 0 0 0 58,534,056 58,534,056 58,534'056 58,534,056 58,534,056 58,534,056
971 921/OFFICE SUPPLIES 403,723 0 0 0 0 403,723 403.723 403,723 403'723 403,723 403,723
972 922/ADMIN&GENERAL EXPENSES TRANSFERRED-CR 0 0 0 0 0 0 0 0 0 0 0
973 9231 OUTSIDE SERVICES 0 0 0 0 0 0 0 0 0 0
974 924/PROPERTY INSURANCE 0 0 0 0 0 0 0 0
975 PRODUCTION-STEAM 0 0 0 0 0 0 0 0
976 ALL RISK&MISCELLANEOUS 426,708 0 0 0 0 426,708 426,708 426,708 426,708 426,708 426,708
977 TOTAL ACCOUNT 924 426,708
978
979925/INJURIES&DAMAGES 146,5 0 0 0 0 146,518 146,518 146,518 146,518 146,518 146,518
980 926/EMPLOYEE PENSIONS&BENEFITS 0 0 0 0 0 0 0 0 0 0
981 927/FRANCHISE REQUIREMENTS 0 0 0 0 0 0 0 0 0
982 928/REGULATORY COMMISSION EXPENSES 0
983 FERC ADMIN ASSESSMENTS 11 0 0 0 0 0 0 0 0 0 0
964 FERC RATE CASE EXPENSE , 0 0 0 0 0 0 0 0 0 0 0
985 SEC EXPENSES 0 0 0 0 0 0 0 0 0 0 0
986 IDAHO PUC-RATE CASE 0 0 0 0 0 0 0 0 0 0 0
987 -OTHER 0 0 0 0 0 0 0 0 0 0 0
988 OREGON PUC-RATE CASE 0 0 0 0 0 0 0 0 0 0
989 -OTHER 0 0 0 0 0 0 0 0 0 0
990 TOTAL ACCOUNT 928 0 0 0 0 0 0 0 0
991
992 929/DUPLICATE CHARGES 0 0 0 0 0 0 0 0 0 0
993930.1/GENERAL ADVERTISING 0 0 0 0 0 0 0 0 0 0 0
994 930.2/MISCELLANEOUS EXPENSES 198,088 0 0 0 0 198,088 198,088 198,088 198,088 198,088 198,088
995 931/RENTS 0 0 0 0 0 0 0 0 0 0
996935/GENERAL PLANT MAINTENANCE 1,228, 0 0 0 0 1,228,809 1,228,809 1,228,809 1,228,809 1,228,809 1,228,809
997 TOTAL ADMIN&GENERAL EXPENSES 60,937,902 0 0 0 0 60,937,902 60,937,902 60,937,902
998 TOTAL OPER&MAINT EXPENSES 158,798,646 0 0 0 0 158,798,646 158,798,646 158,798,646
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 17 of 202
Results of Operations Model

u u
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 18 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
9***SUMMARY OFRESULTS***
10
11 DEVELOPMENT OF RATE BASE COMPONENTS
12
13 ELECTRIC PLANT IN SERVICE 6,238,594,514 5,974,559,255 264,035,259
14 LESS:ACCUM PROVISION FOR DEPRECIATION 2,099,026,164 2,009,627,929 89,398,235
15 AMORT OF OTHER UTILITY PLANT 41,962,522 40,292,832 1,669,690
16 NET ELECTRIC PLANT IN SERVICE 4,097,605,828 3,924,638,495 172,967,333
17 LESS:CUSTOMER ADV FOR CONSTRUCTION 32,170,424 32,110,363 60,062
18 LESS:ACCUM DEFERRED INCOME TAXES 385,929,342 369,441,578 16,487,764
19 ADD:PLT HLD FOR FUTURE+ACQUIS ADJ 9,379,315 9,018,500 360,815
20 ADD:WORKING CAPITAL 157,794,969 150,984,835 6,810,134
21 ADD:CONSERVATION+OTHERDFRDFROG. 26,912,065 21,708,923 5,203,142
22 ADD:SUBSIDIARY RATE BASE 36,192,061 34,681,665 1,510,396
23
24 TOTAL COMBINED RATE BASE 3,909,784,472 3,739,480,478 170,303,994
25
26 RATE OF RETURN UNDER PRESENT RATES
27 OPERATING REVENUES
28 SALES REVENUES 1,562,807,566 1,493,119,939 69,687,626
29 OTHER OPERATING REVENUES 117,737,446 112,760,555 4,976,890
30 TOTAL OPERATING REVENUES 1,680,545,011 1,605,880,495 74,664,517
31 OPERATING EXPENSES
32 OPERATION&MAINTENANCE EXPENSES 1,168,004,169 1,117,407,351 50,596,818
33 DEPRECIATION EXPENSE 147,575,568 141,446,830 6,128,738
34 AMORTIZATION OF LIMITED TERM PLANT 5,439,874 5,217,016 222,858
35 ACCRETION EXPENSE 12,995 12,485 509
36 TAXES OTHER THAN INCOME 25,081,924 22,993,101 2,088,823
37 REGULATORY DEBITS/CREDITS 1,846,154 1,528,445 317,709
38 PROVISION FOR DEFERRED INCOME TAXES (17,705,575) (16,998,230) (707,345)
39 INVESTMENT TAX CREDIT ADJUSTMENT 50,193,136 48,067,423 2,125,713
40 FEDERAL INCOME TAXES (16,108,683) (15,313,233) (795,450)
41 STATE INCOME TAXES 935,641 894,784 40,857
42 TOTAL OPERATING EXPENSES 1,365,275,203 1,305,255,974 60,019,230
43 OPERATING INCOME 315,269,808 300,624,521 14,645,287
44 ADD: IER00 OPERATING INCOME 8,033,987 7,698,707 335,281
45 CONSOLIDATED OPERATING INCOME 323,303,796 308,323,228 14,980,568
46
47 RATE OF RETURN UNDER PRESENT RATES 8.269% 8.245% 8.796%
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 19 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
48***SUMMARY OF RESULTS***
49
50 RATE OF RETURN UNDER PRESENT RATES
51 TOTAL COMBINED RATE BASE 3,909,784,472 3,739,480,478 170,303,994
52
53 SALES REVENUES 1,562,807,566 1,493,119,939 69,687,626
54 OTHER OPERATING REVENUES 117,737,446 112,760,555 4,976,890
55 TOTAL OPERATING REVENUES 1,680,545,011 1,605,880,495 74,664,517
56 OPERATING EXPENSES
57 OPERATION&MAINTENANCE EXPENSES 1,168,004,169 1,117,407,351 50,596,818
58 DEPRECIATION EXPENSE 147,575,568 141,446,830 6,128,738
59 AMORTIZATION OF LIMITED TERM PLANT 5,439,874 5,217,016 222,858
60 ACCRETION EXPENSE 12,995 12,485 509
61 TAXES OTHER THAN INCOME 25,081,924 22,993,101 2,088,823
62 REGULATORY DEBITS/CREDITS 1,846,154 1,528,445 317,709
63 PROVISION FOR DEFERRED INCOME TAXES (17,705,575) (16,998,230) (707,345)
64 INVESTMENT TAX CREDIT ADJUSTMENT 50,193,136 48,067,423 2,125,713
65 FEDERAL INCOME TAXES (16,108,683) (15,313,233) (795,450)
66 STATE INCOME TAXES 935,641 894,784 40,857
67 TOTAL OPERATING EXPENSES 1,365,275,203 1,305,255,974 60,019,230
68 OPERATING INCOME 315,269,808 300,624,521 14,645,287
69 ADD: IER00 OPERATING INCOME 8,033,987 7,698,707 335,281
70 CONSOLIDATED OPERATING INCOME 323,303,796 308,323,228 14,980,568
71 RATE OF RETURN UNDER PRESENT RATES 8.269% 8.245% 8.796%
72
73 DEVELOPMENT OF REVENUE REQUIREMENTS
74 RATE OF RETURN REQUIRED(BASED ON 10%ROE) 7.863% 7.863%
75
76 RETURN AT CLAIMED RATE OF RETURN 307,426,353 294,035,350 13,391,003
77 EARNINGS DEFICIENCY (15,877,443) (14,287,878) (1,589,565)
78 ADD:CWIP(RELICENSING) 6,815,472 6,520,122 295,350
79 DEFICIENCY WITH CWIP (9,061,971) (7,767,756) (1,294,215)
80
81 NET-TO-GROSS TAX MULTIPLIER 1.347 1.347 1.347
82
83 REVENUE DEFICIENCY (12,206,474) (10,463,167) (1,743,307)
84
85 FIRM JURISDICTIONAL REVENUES 1,394,973,529 1,332,290,085 62,683,444
86
87 PERCENT INCREASE REQUIRED -0.88% -0.79% -2.78%
88
89 SALES AND WHEELING REVENUES REQUIRED 1,382,767,055 1,321,826,919 60,940,136
M. Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 20 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
90—TABLE TABLE 1-ELECTRIC PLANT IN SERVICE
91
92 INTANGIBLE PLANT
93 301-ORGANIZATION P1o1P 5,703 5,461 242
94302-FRANCHISES&CONSENTS Dio 52,232,057 50,193,385 2,038,672
95303-MISCELLANEOUS P101P 54,860,902 52,537,506 2,323,396
96
97 TOTAL INTANGIBLE PLANT 107,098,661 102,736,352 4,362,309
98
99 PRODUCTION PLANT
100 310-316/STEAM PRODUCTION Dio 267,538,090 257,095,799 10,442,292
101330-336/HYDRAULIC PRODUCTION D10 1,100,725,931 1,057,763,446 42,962,485
102 340-346/OTHER PRODUCTION-LANGLEY D10 410,062,584 394,057,412 16,005,172
103 340-346/OTHER PRODUCTION-DANSKIN/BENNETT MTN D10 199,966,966 192,162,046 7,804,920
104
105 TOTAL PRODUCTION PLANT 1,978,293,572 1,901,078,703 77,214,869
106
107 TRANSMISSION PLANT
108 350/LAND&LAND RIGHTS
109 SYSTEM TRANSMISSION SERVICE D11 41,300,354 39,688,358 1,611,996
110 DIRECT ASSIGNMENT DA350 0 0 0
111 TOTAL ACCOUNT350 41,300,354 39,688,358 1,611,996
112
113 352/STRUCTURES&IMPROVEMENTS
114 SYSTEM TRANSMISSION SERVICE D11 102,251,406 98,260,427 3,990,979
115 DIRECT ASSIGNMENT DA352 658 0 658
116 TOTAL ACCOUNT 352 102,252,064 98,260,427 3,991,638
117
118 353/STATION EQUIPMENT
119 SYSTEM TRANSMISSION SERVICE D11 470,680,037 452,308,902 18,371,134
120 DIRECT ASSIGNMENT DA353 111,594 75,100 36,494
121 TOTAL ACCOUNT 353 470,791,630 452,384,002 18,407,628
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 21 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
122***TABLE 1-ELECTRIC PLANT IN SERVICE*
123
124 3541 TOWERS&FIXTURES
125 SYSTEM TRANSMISSION SERVICE un 232,732,978 223,649,166 9,083,812
126 DIRECT ASSIGNMENT DA354 0 0 0
127 TOTAL ACCOUNT354 232,732,978 223,649,166 9,083,812
128
129 3551 POLES&FIXTURES
130 SYSTEM TRANSMISSION SERVICE D11 235,909,163 226,701,381 9,207,782
131 DIRECT ASSIGNMENT DA355 33,842 0 33,842
132 TOTAL ACCOUNT 355 235,943,004 226,701,381 9,241,623
133
134 3561 OVERHEAD CONDUCTORS&DEVICES
135 SYSTEM TRANSMISSION SERVICE D11 269,020,474 258,520,323 10,500,151
136 DIRECT ASSIGNMENT DA356 26,495 1,189 25,306
137 TOTAL ACCOUNT 356 269,046,969 258,521,512 10,525,457
138
139 3591 ROADS&TRAILS
140 SYSTEM TRANSMISSION SERVICE D11 391,407 376,130 15,277
141 DIRECT ASSIGNMENT DA359 0 0 0
142 TOTAL ACCOUNT 359 391,407 376,130 15,277
143
144 TOTAL TRANSMISSION PLANT 1,352,458,407 1,299,580,976 52,877,431
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 22 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
145-TABLE TABLE 1-ELECTRIC PLANT IN SERVICE
146
147 DISTRIBUTION PLANT
148
149 360/LAND&LAND RIGHTS ACCT360 9,024,558 8,641,897 382,661
150 361/STRUCTURES&IMPROVEMENTS ACCT361 62,286,419 59,574,241 2,712,178
151 362/STATION EQUIPMENT ACCT362 333,778,528 320,186,976 13,591,552
152 363/BATTERY STORAGE D10 52,299,287 50,257,991 2,041,296
153364/POLES,TOWERS&FIXTURES DA364 333,422,399 307,301,185 26,121,215
154 365/OVERHEAD CONDUCTORS&DEVICES DA365 161,939,763 152,866,451 9,073,313
155 366/UNDERGROUND CONDUIT DA366 55,753,674 54,858,172 895,502
156 367/UNDERGROUND CONDUCTORS&DEVICES DA367 338,826,990 333,716,692 5,110,297
157368/LINE TRANSFORMERS ACCT368 750,275,508 709,131,796 41,143,712
158 369/SERVICES DA369 70,650,589 67,740,904 2,909,686
159 370/METERS ACCT370 115,905,804 112,356,866 3,548,937
160 371/INSTALLATIONS ON CUSTOMER PREMISES DA371 5,271,974 4,926,363 345,611
161 373/STREET LIGHTING SYSTEMS DA373 6,798,038 6,459,698 338,340
162
163 TOTAL DISTRIBUTION PLANT 2,296,233,531 2,188,019,232 108,214,300
164
165 GENERAL PLANT
166 389/LAND&LAND RIGHTS PTD 21,009,062 20,119,314 889,748
167390/STRUCTURES&IMPROVEMENTS PTD 160,648,651 153,845,074 6,803,578
168 391/OFFICE FURNITURE&EQUIPMENT PTD 41,685,122 39,919,729 1,765,393
169 392/TRANSPORTATION EQUIPMENT PTD 123,353,458 118,129,356 5,224,101
170 393/STORES EQUIPMENT PTD 5,755,716 5,511,958 243,758
171 394/TOOLS,SHOP&GARAGE EQUIPMENT PTD 15,329,002 14,679,809 649,193
172 395/LABORATORY EQUIPMENT PTD 15,855,583 15,184,089 671,495
173 396 1 POWER OPERATED EQUIPMENT PTD 28,599,480 27,388,272 1,211,207
174 397/COMMUNICATIONS EQUIPMENT PTD 81,280,140 77,837,872 3,442,268
175 398/MISCELLANEOUS EQUIPMENT PTD 10,994,128 10,528,519 465,609
176
177 TOTAL GENERAL PLANT 504,510,343 483,143,992 21,366,350
178
179 TOTAL ELECTRIC PLANT IN SERVICE 6,238,594,514 5,974,559,255 264,035,259
180
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 23 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
181 "**TABLE 2-ACCUMULATED PROVISION FOR DEPRECIATION
182
183 PRODUCTION PLANT
184 310-316/STEAM PRODUCTION L 100 153,589,237 147,594,488 5,994,749
185 330-336/HYDRAULIC PRODUCTION L 101 512,200,799 492,209,066 19,991,733
186 340-346/OTHER PRODUCTION-LANGLEY L102 95,316,793 91,596,479 3,720,314
187 340-346/OTHER PRODUCTION-DANSKIN/BENNETT MTN L 103 68,783,440 66,098,751 2,684,690
188 TOTAL PRODUCTION PLANT 829,890,269 797,498,783 32,391,486
189
190 TRANSMISSION PLANT
191350/LAND&LAND RIGHTS L111 10,201,176 9,803,014 398,163
192 352/STRUCTURES&IMPROVEMENTS L116 34,024,191 32,695,981 1,328,210
193 353/STATION EQUIPMENT L 121 124,571,292 119,700,640 4,870,652
194354/TOWERS&FIXTURES L127 80,393,821 77,255,966 3,137,855
195355/POLES&FIXTURES L132 80,452,007 77,300,792 3,151,215
196 356/OVERHEAD CONDUCTORS&DEVICES L 137 90,157,528 86,630,452 3,527,076
197 359/ROADS&TRAILS L 142 297,401 285,793 11,608
198 TOTAL TRANSMISSION PLANT 420,097,416 403,672,637 16,424,779
199
200 DISTRIBUTION PLANT
201 360/LAND&LAND RIGHTS L 149 238,694 228,573 10,121
202 361/STRUCTURES&IMPROVEMENTS L 150 16,741,103 16,012,134 728,969
203 362/STATION EQUIPMENT L 151 73,780,227 70,775,876 3,004,351
204363/BATTERY STORAGE L152 515,607 495,482 20,125
205 364/POLES,TOWERS&FIXTURES L 153 147,518,314 135,961,329 11,556,985
206 365/OVERHEAD CONDUCTORS&DEVICES L 154 58,339,694 55,070,983 3,268,711
207 366/UNDERGROUND CONDUIT L155 19,494,289 19,181,177 313,113
208 367/UNDERGROUND CONDUCTORS&DEVICES L 156 106,185,992 104,584,461 1,601,531
209 368/LINE TRANSFORMERS L 157 200,247,531 189,266,329 10,981,202
210 369/SERVICES L 156 46,534,802 43,659,489 1,875,313
211 370/METERS L 159 38,082,580 36,916,524 1,166,056
212 3711 INSTALLATIONS ON CUSTOMER PREMISES L 160 1,066,419 996,509 69,910
213 373/STREET LIGHTING SYSTEMS L 161 951,612 904,250 47,362
214 TOTAL DISTRIBUTION PLANT 708,696,863 674,053,115 34,643,748
215
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 24 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
216"'TABLE 2-ACCUMULATED PROVISION FOR DEPRECIATION
217
218 GENERAL PLANT
219 389/LAND&LAND RIGHTS L 166 0 0 0
220 390/STRUCTURES&IMPROVEMENTS L167 36,271,090 34,734,985 1,536,105
221 3911 OFFICE FURNITURE&EQUIPMENT L 168 18,777,006 17,981,787 795,219
222 392/TRANSPORTATION EQUIPMENT L 169 25,286,446 24,215,548 1,070,898
223 393/STORES EQUIPMENT L 170 1,465,091 1,403,044 62,048
224 394 1 TOOLS,SHOP&GARAGE EQUIPMENT L171 4,941,389 4,732,118 209,271
225 395/LABORATORY EQUIPMENT L172 6,878,913 6,587,587 291,327
226 396/POWER OPERATED EQUIPMENT L 173 5,668,406 5,428,346 240,061
227 397/COMMUNICATIONS EQUIPMENT L174 33,377,268 31,963,718 1,413,550
228 398/MISCELLANEOUS EQUIPMENT L 175 4,378,613 4,193,176 185,437
229 TOTAL GENERAL PLANT 137,044,223 131,240,308 5,803,914
230
231 UNDER-/OVERALLOCATED SALVAGE L 97 0 0 0
232 TOTAL DEPR BEFORE FAS 143/OTHER 2,095,728,771 2,006,464,844 89,263,927
233
234 FAS 143 ADJ&/OR DISALLOWED COSTS L 97 3,297,393 3,163,085 134,308
235 TOTAL ACCUM PROVISION DEPRECIATION 2,099,026,164 2,009,627,929 89,398,235
236
237 AMORTIZATION OF OTHER UTILITY PLANT
238 INTANGIBLE PLANT L 97 18,727,740 17,964,928 762,812
239 HYDRAULIC PRODUCTION L 101 23,234,782 22,327,904 906,878
240
241 TOTAL AMORT OF OTHER UTILITY PLANT 41,962,522 40,292,832 1,669,690
242
243 TOTAL ACCUM PROVISION FOR DEPR
244 &AMORTIZATION OF OTHER UTILITY PLANT 2,140,988,686 2,049,920,760 91,067,926
245
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 25 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
246***TABLE 3-ADDITIONS&DELETIONS TO RATE BASE*''
247
248 NET ELECTRIC PLANT IN SERVICE 4,097,605,828 3,924,638,495 172,967,333
249 LESS:
250 252 CUSTOMER ADVANCES FOR CONSTRUCTION
251 POWER SUPPLY D10 0 0 0
252 OTHER DA252 32,170,424 32,110,363 60,062
253 TOTAL CUSTOMER ADV FOR CONSTRUCTION 32,170,424 32,110,363 60,062
254
255 ACCUMULATED DEFERRED INCOME TAXES
256 190/ACCUMULATED DEFERRED INCOME TAXES
257 CUSTOMER ADVANCES FOR CONSTRUCTION DA252 (3,854,109) (3,846,913) (7,196)
258 OTHER LABOR (13,759,745) (13,164,380) (595,365)
259 TOTAL ACCOUNT190 (17,613,854) (17,011,294) (602,560)
260 281/ACCELERATED AMORTIZATION P1o1P 0 0 0
261282/OTHER PROPERTY P1o1P 393,362,324 376,703,166 16,659,157
262 283/OTHER P701P 10,180,872 9,749,705 431,167
263 TOTAL ACCUM DEFERRED INCOME TAXES 385,929,342 369,441,578 16,487,764
264
265 NET ELECTRIC PLANT IN SERVICE 3,679,506,062 3,523,086,554 156,419,508
266 ADD:
267 WORKING CAPITAL
268 151/FUEL INVENTORY E10 15,316,675 14,677,467 639,208
269 154/PLANT MATERIALS&SUPPLIES
270 PRODUCTION-GENERAL L 105 14,733,716 14,158,644 575,072
271 TRANSMISSION-GENERAL L143 32,918,344 31,631,327 1,287,017
272 DISTRIBUTION-GENERAL L 163 67,378,274 64,202,947 3,175,327
273 OTHER-UNCLASSIFIED L 179 4,737,661 4,537,149 200,511
274 TOTAL ACCOUNT 154 119,767,996 114,530,067 5,237,928
275 165/PREPAID ITEMS
276 AD VALOREM TAXES L707 2,682,156 2,569,411 112,745
277 OTHER PROD-RELATED PREPAYMENTS D10 360,479 346,409 14,070
278 INSURANCE L 105 8,059,861 7,745,276 314,585
279 PENSION-RELATED PREPAYMENTS L 1002 0 0 0
280 SOFTWARE CONTRACTS L 95 5,520,067 5,286,288 233,779
281 MISCELLANEOUS PREPAYMENTS P1o1P 6,087,735 5,829,915 257,820
282 TOTAL ACCOUNT165 22,710,298 21,777,300 932,998
283 WORKING CASH ALLOWANCE L 623 0 0 0
284
285 TOTAL WORKING CAPITAL 157,794,969 150,984,835 6,810,134
286
287 NET ELECTRIC PLANT IN SERVICE 3,837,301,031 3,674,071,389 163,229,642
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 26 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
288***TABLE 3-ADDITIONS&DELETIONS TO RATE BASE
289
290 NET ELECTRIC PLANT IN SERVICE 3,837,301,031 3,674,071,389 163,229,642
291 ADD:
292 105/PLANT HELD FOR FUTURE USE
293 HYDRAULIC PRODUCTION L101 104,155 100,090 4,065
294 TRANS LAND&LAND RIGHTS L 111 2,906,703 2,793,251 113,452
295 TRANS STRUCTURES&IMPROVEMENTS L116 166,669 160,163 6,506
296 TRANS STATION EQUIPMENT L 121 32,400 31,133 1,267
297 DIST LAND&LAND RIGHTS L 149 5,043,035 4,829,199 213,836
298 DIST STRUCTURES&IMPROVEMENTS L 150 498,106 476,417 21,689
299 GEN LAND&LAND RIGHTS L 166 0 0 0
300 GEN STRUCTURES&IMPROVEMENTS L 167 0 0 0
301 TOTAL PLANT HELD FOR FUTURE USE 8,751,068 8,390,253 360,815
302
303 ELECTRIC PLANT ACQUISITION ADJ.-1 14/5 CIDA 628,247 628,247 0
304
305 DEFERRED PROGRAMS:
306 1821 CONSERVATION PROGRAMS
307 IDAHO DEFERRED CONSERVATION PROGRAMS CIDA 0 0 0
308 OREGON DEFERRED CONSERVATION PROGRAMS CODA 0 0 0
309 TOTAL CONSERVATION PROGRAMS 0 0 0
310 182/MISC.OTHER REGULATORY ASSETS
311 CUB FUND INTEREST-OPUC ORDER I5-399 CODA 59,702 0 59,702
312 AM.FALLS BOND REFINANCE D10 72,977 70,129 2,848
313 SFAS 87 CAPITALIZED PENSION-OPUC ORDER 10-064 CODA 7,096,835 0 7,096,835
314 CLOUD COMPUTING-IPUC ORDER 34707 CIDA 1,250,083 1,250,083 0
315 WILDFIRE MITIGATION-IPUC ORDER 35077 CIDA 0 0 0
316 SIEMENS LTP DEFERRED RATE BASE-IPUC ORDER 33420 CIDA 8,181,006 8,181,006 0
317 SIEMENS LTP RATE BASE-IPUC ORDER 33420 CIDA 12,207,705 12,207,705 0
318 SIEMENS LTP DEFERRED RATE BASE-OPUC ORDER 15-387 CODA 343,307 0 343,307
319 SIEMENS LTP RATE BASE-OPUC ORDER 15-387 CODA 471,789 0 471,789
320 TOTAL OTHER REGULATORY ASSETS 29,683,405 21,708,923 7,974,482
321 186/MISC.OTHER DEFERRED PROGRAMS EIO 0 0 0
322 254/JIM BRIDGER PLANT END OF LIFE DEPR-OPUC ORD 12-296 CODA (2,753,872) 0 (2,753,872)
323 RECONNECT FEES-OPUC ADV 16-09 CODA (17,468) 0 (17,468)
324 TOTAL DEFERRED PROGRAMS 26,912,065 21,708,923 5,203,142
325
326 DEVELOPMENT OF IERCO RATE BASE
327 INVESTMENT IN IERCO EIO 18,375,460 17,608,601 766,859
328 PREPAID COAL ROYALTIES EIO 606,862 581,536 25,326
329 NOTES RECEIVABLE FROM SUBSIDIARY EIO 17,209,739 16,491,529 718,210
330 TOTAL SUBSIDIARY RATE BASE 36,192,061 34,681,665 1,510,396
331
332 TOTAL COMBINED RATE BASE 3,909,784,472 3,739,480,478 170,303,994
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 27 of 202
Results of Operations Model

I IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
333**"TABLE 4-OPERATING REVENUES"
334 OPERATING REVENUES
335 FIRM ENERGY SALES
336440448/RETAIL RETREV 1,394,973,529 1,332,290,085 62,683,444
337 4471 FIRM SALES FOR RESALE E10 0 0 0
3384471 SYSTEM OPPORTUNITY SALES E10 167,834,037 160,829,854 7,004,183
339 TOTAL SALES OF ELECTRICITY 1,562,807,566 1,493,119,939 69,687,626
340
341 OTHER OPERATING REVENUES
342 415/MERCHANDISING REVENUES D60 0 0 0
343
344 449/OATT TARIFF REFUND
345 NETWORK D11 0 0 0
346 POINT-TO-POINT D11 0 0 0
347 TOTAL ACCOUNT 449 0 0 0
348
349 451/MISCELLANEOUS SERVICE REVENUES DA451 5,220,513 5,158,858 61,655
350
351 454/RENTS FROM ELECTRIC PROPERTY
352 SUBSTATION EQUIPMENT L121 3,272,778 3,144,815 127,963
353 TRANSFORMER RENTALS 311 17,330 16,654 676
354 LINE RENTALS D11 0 0 0
355 COGENERATION L 490 1,896,418 1,817,275 79,143
356 DARK FIBER PROJECT CIDA 66,667 66,667 0
357 POLE ATTACHMENTS L 153 1,756,476 1,618,869 137,607
358 FACILITIES CHARGES DAA54 10,841,971 10,407,743 434,228
359 OTHER RENTALS L101 1,246,139 1,197,501 48,638
360 WATER LEASE E10 66,960 64,166 2,794
361 TOTAL ACCOUNT454 19,164,738 18,333,688 831,050
362
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 28 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
s
s
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
363 4561 OTHER ELECTRIC REVENUES
364 TRANSMISSION-NETWORK SERVICES D11 10,740,800 10,321,575 419,225
365 TRANSMISSION-NETWORK SERVICES-DISTFACILITIES D60 765,132 737,226 27,906
366 TRANSMISSION-POINT-TO-POINT D71 49,148,205 47,229,899 1,918,306
367 ALTERNATE TRANSMISSION SERV.CHG. L 144 0 0 0
368 PHOTOVOLTAIC STATION SERVICE L 163 0 0 0
369 DSM RIDER FUNDS DARIDER 31,947,854 30,229,460 1,718,394
370 STANDBY SERVICE CHARGE CIDA 741,858 741,858 0
371 SIERRA PACIFIC USAGE CHARGE Eio 0 0 0
372 BPA-OTHER REVENUE Dio 0 0 0
373 ANTELOPE L 515 0 0 0
374 MISCELLANEOUS PTD 8,346 7,993 353
375 TOTAL ACCOUNT 456 93,352,194 89,268,010 4,084,184
376
377 TOTAL OTHER OPERATING REVENUES 117,737,446 112,760,555 4,976,890
378
379 TOTAL OPERATING REVENUES 1,680,545,011 1,605,880,495 74,664,517
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 29 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
380"*"TABLE 5-OPERATION&MAINTENANCE EXPENSES*"
381
382 STEAM POWER GENERATION
383 OPERATION
384500/SUPERVISION&ENGINEERING DIO (154,681) (148,644) (6,037)
385 501/FUEL E10 95,499,326 91,513,873 3,985,453
386
387 502/STEAM EXPENSES
388 LABOR DIO 0 0 0
389 OTHER E10 (2,000) (1,917) (83)
390 TOTAL ACCOUNT 502 (2,000) (1,917) (83)
391 505/ELECTRIC EXPENSES
392 LABOR D10 0 0 0
393 OTHER E10 (0) (0) (0)
394 TOTAL ACCOUNT 505 (0) (0) (0)
395 506/MISCELLANEOUS EXPENSES DIO 5 5 0
396 507/RENTS L 100 0 0 0
397 TOTAL STEAM OPERATION EXPENSES 95,342,650 91,363,317 3,979,333
398
399 MAINTENANCE
400 510/SUPERVISION&ENGINEERING DIO (282,132) (271,120) (11,012)
401 511 /STRUCTURES DIO (0) (0) (0)
402 512/BOILER PLANT
403 LABOR D10 0 0 0
404 OTHER E10 0 0 0
405 TOTAL ACCOUNT 512 0 0 0
406 513/ELECTRIC PLANT
407 LABOR DIO 0 0 0
408 OTHER E10 0 0 0
409 TOTAL ACCOUNT 513 0 0 0
410 514/MISCELLANEOUS STEAM PLANT D10 0 0 0
411 TOTAL STEAM MAINTENANCE EXPENSES (282,131) (271,119) (11,012)
412
413 TOTAL STEAM GENERATION EXPENSES 95,060,519 91,092,198 3,968,321
414
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 30 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
415***TABLE 5-OPERATION&MAINTENANCE EXPENSES
416
417 HYDRAULIC POWER GENERATION
418535/SUPERVISION&ENGINEERING L879 5,340,529 5,131,105 209,424
419 536/WATER FOR POWER
420 WATER LEASE D10 0 0 0
421 OTHER D10 3,307,266 3,178,180 129,086
422 TOTAL ACCOUNT 536 3,307,266 3,178,180 129,086
423
424 537/HYDRAULIC EXPENSES DIO 19,018,910 18,276,582 742,328
425 538/ELECTRIC EXPENSES
426 LABOR D10 1,659,356 1,594,590 64,766
427 OTHER E10 513,003 491,594 21,409
428 TOTAL ACCOUNT 538 2,172,360 2,086,184 86,175
429
430 539/MISCELLANEOUS EXPENSES DIO 5,528,687 5,312,896 215,790
431 540/RENTS DIO 311,854 299,682 12,172
432
433 TOTAL HYDRAULIC OPERATION EXPENSES 35,679,606 34,284,630 1,394,976
434
435 MAINTENANCE
436 541/SUPERVISION&ENGINEERING L 885 198,386 190,643 7,743
437542/STRUCTURES DIO 926,513 890,350 36,163
438 543/RESERVOIRS,DAMS&WATERWAYS D10 2,272,689 2,183,984 88,705
439 5"/ELECTRIC PLANT
440 LABOR D10 1,724,170 1,656,874 67,296
441 OTHER E10 697,230 668,133 29,097
442 TOTAL ACCOUNT544 2,421,400 2,325,007 96,394
443
444 545/MISCELLANEOUS HYDRAULIC PLANT L 101 3,510,965 3,373,928 137,037
445
446 TOTAL HYDRAULIC MAINTENANCE EXPENSES 9,329,953 8,963,911 366,042
447
448 TOTAL HYDRAULIC GENERATION EXPENSES 45,009,559 43,248,541 1,761,018
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 31 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
449***TABLE 5-OPERATION&MAINTENANCE EXPENSES
450 OTHER POWER GENERATION
451 OPERATION
452 546/SUPERVISION&ENGINEERING L 892 655,573 629,986 25,588
453 547/FUEL
454 SALMON DIESEL E10 16,517 15,828 689
455 OTHER E10 179,888,998 172,381,728 7,507,270
456 TOTAL ACCOUNT547 179,905,516 172,397,556 7,507,959
457
458 548/GENERATING EXPENSES
459 LABOR D10 0 0 0
460 OTHER E10 5,285,971 5,065,373 220,598
461 TOTAL ACCOUNT 548 5,285,971 5,065,373 220,598
462
463 549/MISCELLANEOUS EXPENSES D10 757,159 727,606 29,553
464 550/RENTS D10 0 0 0
465
466 TOTAL OTHER POWER OPER EXPENSES 186,604,219 178,820,521 7,783,698
467
468 MAINTENANCE
469 551/SUPERVISION&ENGINEERING L 898 0 0 0
470 552/STRUCTURES DI O 144,293 138,661 5,632
471 553/GENERATING&ELECTRIC PLANT
472 LABOR D10 65,753 63,186 2,566
473 OTHER E10 (91,258) (87,449) (3,808)
474 TOTAL ACCOUNT 553 (25,505) (24,263) (1,242)
475
476 554/MISCELLANEOUS EXPENSES L 103 5,193,505 4,990,797 202,708
477 TOTAL OTHER POWER MAINT EXPENSES 5,312,293 5,105,195 207,098
478
479 TOTAL OTHER POWER GENERATION EXP 191,916,512 183,925,716 7,990,796
480
M. Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 32 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
a DESCRIPTION SOURCE SYSTEM IPUC OPUC
481 OTHER POWER SUPPLY EXPENSE
482 555.0/PURCHASED POWER
483 PURCHASED POWER-TRANS LOSSES E10 1,096,106 1,050,362 45,744
484 DEMAND RESPONSE INCENTIVES CIDA 10,775,871 10,775,871 0
485 OTHER PURCHASED POWER E10 279,389,490 267,729,787 11,659,703
486 TOTAL ACCOUNT555.0 291,261,467 279,556,020 11,705,447
487 555.1/COGENERATION&SMALL POWER PROD
488 CAPACITY RELATED D70 0 0 0
489 ENERGY RELATED E10 199,219,096 190,905,127 8,313,969
490 TOTAL COGEN&SMALL POWER PROD 199,219,096 190,905,127 8,313,969
491
492 TOTAL ACCOUNT555 490,480,562 470,461,147 20,019,416
493
494 556/LOAD CONTROL&DISPATCHING EXPENSES D10 0 0 0
495 557/OTHER EXPENSES
496 IDAHO POWER COST-RELATED EXPENSES CIDA 5,513,655 5,513,655 0
497 OREGON POWER COST-RELATED EXPENSES CODA 1,371,393 0 1,371,393
498 OTHER D10 2,277,024 2,188,150 88,875
499 TOTAL ACCOUNT 557 9,162,072 7,701,805 1,460,268
500
501 TOTAL OTHER POWER SUPPLY EXPENSES 499,642,635 478,162,951 21,479,683
502
503 TOTAL PRODUCTION EXPENSES 831,629,224 796,429,406 35,199,818
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 33 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
504"*"TABLE 5-OPERATION&MAINTENANCE EXPENSES*"
505
506 TRANSMISSION EXPENSES
507
508 OPERATION
509 560/SUPERVISION&ENGINEERING L144 3,073,109 2,952,959 120,150
510 561/LOAD DISPATCHING D12 5,414,644 5,203,305 211,339
511 562/STATION EXPENSES L121 2,751,453 2,643,873 107,580
512563/OVERHEAD LINE EXPENSES L127+132+137 1,204,912 1,157,790 47,122
513565/TRANSMISSION OF ELECTRICITY BY OTHERS E10 11,050,622 10,589,449 461,173
514 566/MISCELLANEOUS EXPENSES L 144 0 0 0
515 567/RENTS L 144 5,051,708 4,854,200 197,508
516
517 TOTAL TRANSMISSION OPERATION 28,546,447 27,401,575 1,144,872
518
519 MAINTENANCE
520 568/SUPERVISION&ENGINEERING L 144 316,322 303,955 12,367
521 569/STRUCTURES L 116 1,855,729 1,783,286 72,443
522 570/STATION EQUIPMENT L 121 3,214,321 3,088,643 125,678
523 571/OVERHEAD LINES L 127+132+137 1,223,568 1,175,717 47,851
524 573/MISCELLANEOUS PLANT L 144 2,834 2,723 111
525 575/OPER TRANS MKT ADMIN-EIM L144 703,023 675,537 27,486
526
527 TOTAL TRANSMISSION MAINTENANCE 7,315,797 7,029,861 285,936
528
529 TOTAL TRANSMISSION EXPENSES 35,862,244 34,431,436 1,430,808
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 34 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
530"'TABLE 5-OPERATION&MAINTENANCE EXPENSES
531
532 DISTRIBUTION EXPENSES
533
534 OPERATION
535 580/SUPERVISION&ENGINEERING L 163 4,454,785 4,244,845 209,940
536 581/LOAD DISPATCHING D60 5,797,830 5,586,368 211,461
537 582/STATION EXPENSES L151 1,798,005 1,724,790 73,215
538 583/OVERHEAD LINE EXPENSES L 153+154 5,617,399 5,218,294 399,105
539 584/UNDERGROUND LINE EXPENSES L 155+156 5,370,499 5,288,756 81,743
540 585/STREET LIGHTING&SIGNAL SYSTEMS L 161 4,822 4,582 240
541 586/METER EXPENSES L 159 6,557,689 6,356,898 200,791
542587/CUSTOMER INSTALLATIONS EXPENSE L160 1,271,643 1,188,279 83,364
543 588/MISCELLANEOUS EXPENSES L 163 4,413,695 4,205,691 208,004
544 589/RENTS L 163 639,456 609,320 30,136
545 TOTAL DISTRIBUTION OPERATION 35,925,822 34,427,823 1,497,999
546
547 MAINTENANCE
548 590/SUPERVISION&ENGINEERING L 163 7,280 6,937 343
549 591/STRUCTURES L 150 0 0 0
550 592/STATION EQUIPMENT L 151 5,071,241 4,864,739 206,502
551 593/OVERHEAD LINES L 153+154 17,770,697 16,508,124 1,262,574
552 594/UNDERGROUND LINES L 155+156 707,482 696,714 10,768
553595/LINE TRANSFORMERS L157 64,482 60,946 3,536
554 596/STREET LIGHTING&SIGNAL SYSTEMS L 161 182,003 172,945 9,058
555 597/METERS L 159 984,112 953,979 30,133
556 598/MISCELLANEOUS PLANT L 163 150,957 143,843 7,114
557 TOTAL DISTRIBUTION MAINTENANCE 24,938,256 23,408,227 1,530,029
558
559 TOTAL DISTRIBUTION EXPENSES 60,864,077 57,836,050 3,028,028
560
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 35 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
561 CUSTOMER ACCOUNTING EXPENSES
562 901/SUPERVISION L 959 898,226 859,065 39,161
563902/METER READING CW902 2,122,543 1,836,014 286,529
564903/CUSTOMER RECORDS&COLLECTIONS CW903 16,141,973 15,613,975 527,998
565904/UNCOLLECTIBLE ACCOUNTS CW904 3,830,484 3,458,798 371,686
566 905/MISC EXPENSES L 563+564+565 (358) (339) (19)
567 TOTAL CUSTOMER ACCOUNTING EXPENSES 22,992,868 21,767,513 1,225,355
568 CUSTOMER SERVICES&INFORMATION EXPENSES
569 907/SUPERVISION L 966 1,040,924 988,008 52,917
570 908/CUSTOMER ASSISTANCE
571 SYSTEM CONSERVATION E1oo 312,791 299,737 13,054
572 OTHER DA908 39,515,607 37,503,939 2,011,668
573 TOTAL ACCOUNT 908 39,828,398 37,803,676 2,024,722
574 909/INFORMATION&INSTRUCTIONAL DA909 282,865 273,844 9,021
575 910/MISCELLANEOUS EXPENSES L 573+574 789,281 749,262 40,019
576 TOTAL CUSTSERV&INFORMATN EXPENSES 41,941,469 39,814,791 2,126,678
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 36 of 202
Results of Operations Model

I IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
577***TABLE 5-OPERATION&MAINTENANCE EXPENSES*"
578 SALES EXPENSES
579 912/DEMO&SELLING EXPENSES E10 0 0 0
580 TOTAL ACCOUNT 924 0 0 0
581
582 ADMINISTRATIVE&GENERAL EXPENSES
583 920/ADMINISTRATIVE&GENERAL SALARIES LABOR 103,542,129 99,062,006 4,480,122
584 921/OFFICE SUPPLIES LABOR 16,350,808 15,643,332 707,476
585 922/ADMIN&GENERAL EXPENSES TRANSFERRED-CR LABOR (42,660,535) (40,814,674) (1,845,861)
586 923/OUTSIDE SERVICES LABOR 10,180,054 9,739,578 440,477
587 924/PROPERTY INSURANCE
588 PRODUCTION-STEAM D10 465,139 446,984 18,155
589 ALL RISK&MISCELLANEOUS P110P 2,865,635 2,751,149 114,485
590 TOTAL ACCOUNT 924 3,330,773 3,198,133 132,640
591
592 925/INJURIES&DAMAGES LABOR 4,152,400 3,972,731 179,668
593 926/EMPLOYEE PENSIONS&BENEFITS LABOR 43,540,293 41,656,365 1,883,927
594 EMPLOYEE PENSIONS&BENEFITS-OREGON CODA 514,677 0 514,677
595 EMPLOYEE PENSIONS&BENEFITS-IDAHO CIDA 17,153,713 17,153,713 0
596 EMPLOYEE PENSIONS&BENEFITS-FERC D11 0 0 0
597 927/FRANCHISE REQUIREMENTS CIDA 0 0 0
598 928/REGULATORY COMMISSION EXPENSES
599 FERC ADMIN ASSESS&SECURITIES
600 CAPACITY RELATED D10 3,043,871 2,925,066 118,805
601 ENERGY RELATED E10 1,044,908 1,001,301 43,607
602 FERC RATE CASE D11 0 0 0
603 FERC ORDER472 E99 1,108,266 1,061,698 46,568
604 FERC OTHER D11 283,013 271,966 11,046
605 FERC-OREGONHYDRO FEE D11 271,717 261,111 10,605
606 SEC EXPENSES L 179 0 0 0
607 IDAHO PUC-RATE CASE CIDA 0 0 0
608 -OTHER CIDA 48,457 48,457 0
609 OREGON PUC-RATE CASE CODA 0 0 0
610 -OTHER CODA 329,733 0 329,733
611 TOTAL ACCOUNT 928 6,129,965 5,569,599 560,365
612
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 37 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
s
s
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
613 929/DUPLICATE CHARGES LABOR 0 0 0
614 930.1/GENERAL ADVERTISING LABOR 36,747 35,157 1,590
615 930.2/MISCELLANEOUS EXPENSES LABOR 4,432,222 4,240,446 191,776
616 931/RENTS L 177 0 0 0
617 TOTAL ADM&GEN OPERATION 166,703,245 159,456,387 7,246,858
618
619 935/GENERAL PLANT MAINTENANCE L177 8,011,042 7,671,769 339,273
620 TOTAL ADMIN&GENERAL EXPENSES 174,714,287 167,128,156 7,586,131
621
622 416/MERCHANDISING EXPENSE D60 0 0 0
623 TOTAL OPER&MAINT EXPENSES 1,168,004,169 1,117,407,351 50,596,818
624
M. Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 38 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
625'*'TABLE 6-DEPRECIATION&AMORTIZATION EXPENSE
626
627 DEPRECIATION EXPENSE
628 310-316/STEAM PRODUCTION L 100 8,996,341 8,645,205 351,137
629 330-336/HYDRAULIC PRODUCTION L101 25,320,109 24,331,838 988,270
630 340-346/OTHER PRODUCTION-LANGLEY L102 12,726,801 12,230,060 496,740
631 340-346/OTHER PRODUCTION-DANSKIN/BENNETT MTN L 103 6,587,217 6,330,111 257,106
632 TOTAL PRODUCTION PLANT 53,630,468 51,537,214 2,093,253
633
634 TRANSMISSION PLANT
635 350/LAND&LAND RIGHTS L 111 415,830 399,599 16,230
636 352/STRUCTURES&IMPROVEMENTS L116 1,937,155 1,861,534 75,621
637 353/STATION EQUIPMENT L 121 10,218,625 9,819,084 399,541
638 354/TOWERS&FIXTURES L 127 2,792,927 2,683,916 109,011
639 355/POLES&FIXTURES L 132 6,050,395 5,813,408 236,987
640 356/OVERHEAD CONDUCTORS&DEVICES L 137 4,005,706 3,848,998 156,708
641 359/ROADS&TRAILS L 142 2,693 2,588 105
642 TOTAL TRANSMISSION PLANT 25,423,331 24,429,127 994,204
643
644 DISTRIBUTION PLANT
645 360/LAND&LAND RIGHTS L 149 29,090 27,857 1,233
646 361/STRUCTURES&IMPROVEMENTS L150 1,326,157 1,268,411 57,746
647 362/STATION EQUIPMENT L 151 6,333,753 6,075,840 257,912
648363/BATTERY STORAGE L152 2,244,322 2,156,724 87,598
649 364/POLES,TOWERS&FIXTURES L 153 6,442,765 5,938,021 504,744
650 365/OVERHEAD CONDUCTORS&DEVICES L 154 3,587,925 3,386,898 201,028
651366/UNDERGROUND CONDUIT L155 1,306,134 1,285,155 20,979
652 367/UNDERGROUND CONDUCTORS&DEVICES L 156 7,626,875 7,511,844 115,031
653368/LINE TRANSFORMERS L157 14,291,908 13,508,166 783,742
654 369/SERVICES L 158 1,167,405 1,119,327 48,079
655 370/METERS L 159 5,727,122 5,551,763 175,360
656 371/INSTALLATIONS ON CUSTOMER PREMISES L 160 217,333 203,085 14,248
657373/STREET LIGHTING SYSTEMS L161 224,905 213,711 11,194
658 TOTAL DISTRIBUTION PLANT 50,525,692 48,246,801 2,278,892
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 39 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
659'*'TABLE 6-DEPRECIATION&AMORTIZATION EXPENSE
660
661 GENERALPLANT
662 389/LAND&LAND RIGHTS L 166 0 0 0
663390/STRUCTURES&IMPROVEMENTS L167 3,293,855 3,154,358 139,497
664 391/OFFICE FURNITURE&EQUIPMENT L 168 6,891,212 6,599,365 291,847
665 392/TRANSPORTATION EQUIPMENT L 169 72,444 69,376 3,068
666 393/STORES EQUIPMENT L 170 220,417 211,082 9,335
667 394/TOOLS,SHOP&GARAGE EQUIPMENT L 171 795,511 761,821 33,690
668 395/LABORATORY EQUIPMENT L172 819,641 784,928 34,712
669 396/POWER OPERATED EQUIPMENT L 173 0 0 0
670 397/COMMUNICATIONS EQUIPMENT L174 5,401,103 5,172,363 228,740
671 398/MISCELLANEOUS EQUIPMENT L175 798,193 764,389 33,804
672 TOTAL GENERAL PLANT 18,292,376 17,517,682 774,694
673
674 403/BOARDMAN ARO DEPRECIATION EXP DAARO 0 0 0
675 DEPR EXP BEFORE DISALLOWED COSTS 147,871,867 141,730,824 6,141,043
676
677 DEPRECIATION ON DISALLOWED COSTS L 675 (296,299) (283,994) (12,305)
678 TOTAL DEPRECIATION EXPENSE 147,575,568 141,446,830 6,128,738
679
680 AMORTIZATION EXPENSE
681 INTANGIBLE PLANT L97 6,193,955 5,941,665 252,290
682 HYDRAULIC PRODUCTION L 101 0 0 0
683 ADJUSTMENTS,GAINS&LOSSES L97 (754,081) (724,648) (29,433)
684 TOTAL AMORTIZATION EXPENSE 5,439,874 5,217,016 222,858
685
686 TOTAL DEPRECIATION&AMORTIZATION EXP 153,015,442 146,663,846 6,351,596
687
688 411.093/4/ARO ACCRETION EXPENSE DAACCRETION 12,995 12,485 509
689
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 40 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
690"*"TABLE 7-TAXES OTHER THAN INCOME TAXES*"'
691
692 TAXES OTHER THAN INCOME
693 FEDERALTAXES
694 FICA LABOR 20,013,326 19,147,378 865,948
695 FUTA LABOR 94,181 90,106 4,075
696 LESS PAYROLL DEDUCTION LABOR (20,385,033) (19,503,001) (882,032)
697
698 STATE TAXES
699 AD VALOREM TAXES
700 JIM BRIDGER STATION L100 1,310,444 1,259,296 51,148
701 VALMY L 100 279,802 268,881 10,921
702 BOARDMAN L 100 0 0 0
703 OTHER-PRODUCTION PLANT L105 5,023,123 4,827,066 196,058
704 OTHER-TRANSMISSION PLANT L 143 5,094,471 4,895,292 199,180
705 OTHER-DISTRIBUTION PLANT L 163 6,775,452 6,456,146 319,306
706 OTHER-GENERAL PLANT L177 1,071,005 1,025,647 45,358
707 SUB-TOTAL 19,554,298 18,732,328 821,970
708
709 LICENSES-HYDRO PROJECTS L101 4,376 4,206 171
710
711 REGULATORY COMMISSION FEES
712 STATE OF IDAHO CIDA 2,837,473 2,837,473 0
713 STATE OF OREGON CODA 260,575 0 260,575
714
715 FRANCHISE TAXES
716 STATE OF OREGON CODA 944,305 0 944,305
717
718 OTHER STATE TAXES
719 UNEMPLOYMENTTAXES LABOR 277,525 265,517 12,008
720 HYDRO GENERATION KWH TAX E10 1,273,632 1,220,480 53,152
721 IRRIGATION-PIC E10 207,265 198,615 8,650
722
723 CANADA GST TAXES E10 0 0 0
724
725 TOTAL TAXES OTHER THAN INCOME 25,081,924 22,993,101 2,088,823
726
727
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 41 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
s
s
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
728***TABLE 8-REGULATORY DEBITS/CREDITS
729 REGULATORY DEBITS/CREDITS
730 STATE OF IDAHO CIDA 1,528,445 1,528,445 0
731 STATE OF OREGON CODA 317,709 0 317,709
732
733 TOTAL REGULATORY DEBITS/CREDITS 1,846,154 1,528,445 317,709
734
735
736***TABLE 9-INCOME TAXES
737
738 410/411 NET PROVISION FOR DEFERRED INCOME TAXES
739 ACCOUNT#282-RELATED P101P (29,254,092) (28,015,162) (1,238,930)
740 ACCOUNTS#190&#283-RELATED L769 11,548,518 11,016,933 531,585
741 TOTAL NET PROVISION FOR DEFERRED INCOME TAXES (17,705,575) (16,998,230) (707,345)
742
743411.4-INVESTMENT TAX CREDIT ADJUSTMENT PIOIP 50,193,136 48,067,423 2,125,713
744
745 SUMMARY OF INCOME TAXES
746
747 TOTAL FEDERAL INCOME TAX L 786 (16,108,683) (15,313,233) (795,450)
748
749 STATE INCOME TAX
750 STATE OF IDAHO L 852 231,952 193,382 38,570
751 STATE OF OREGON L 827 725,290 691,244 34,046
752 OTHER STATES L868 (21,601) 10,158 (31,760)
753 TOTAL STATE INCOME TAXES 935,641 894,784 40,857
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 42 of 202
Results of Operations Model

I IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
754""TABLE 10-CALCULATION OF FEDERAL INCOME TAX
755
756 OPERATING REVENUES 1,680,545,011 1,605,880,495 74,664,517
757
758 OPERATING EXPENSES
759 OPERATION&MAINTENANCE 1,168,004,169 1,117,407,351 50,596,818
760 DEPRECIATION EXPENSE 147,575,568 141,446,830 6,128,738
761 AMORTIZATION OF LIMITED TERM PLANT 5,439,874 5,217,016 222,858
762 ACCRETION EXPENSE 12,995 12,485 509
763 TAXES OTHER THAN INCOME 25,081,924 22,993,101 2,088,823
764 REGULATORY DEBITSICREDITS 1,846,154 1,528,445 317,709
765 TOTAL OPERATING EXPENSES 1,347,960,683 1,288,605,229 59,355,455
766
767 BOOK-TAX ADJUSTMENT L 765 0 0 0
768
769 INCOME BEFORE TAX ADJUSTMENTS 332,584,328 317,275,266 15,309,062
770
771 INCOME STATEMENT ADJUSTMENTS
772 LONG TERM DEBT INTEREST EXPENSE L24 116,216,296 111,154,099 5,062,197
773 OTHER INTEREST EXPENSE L24 19,913,023 19,045,644 867,380
774 TOTAL INTEREST CHARGES 136,129,319 130,199,743 5,929,577
775
776 NET OPERATING INCOME BEFORE STATE INCOME TAXES 196,455,009 187,075,523 9,379,485
777
778 TOTAL STATE INCOME TAXES(ALLOWED) 6,686,528 6,340,288 346,239
779
780 NET FEDERAL INCOME AFTER STATE INCOME TAXES 189,768,481 180,735,235 9,033,246
781
782 FEDERAL TAX AT21PERCENT 39,851,381 37,954,399 1,896,982
783 OTHER CURRENT TAX ADJUSTMENTS L782 (42,231,900) (40,221,602) (2,010,298)
784 PRIOR YEARS'TAX ADJUSTMENT L782 (19,176,415) (18,263,591) (912,824)
785
786 TOTAL FEDERAL INCOME TAX BEFORE OTHER ADJUSTMENTS (21,556,934) (20,530,794) (1,026,140)
787
788 OTHER TAX ADJUSTMENTS
789 ALLOWANCE FOR AFUDC P101P 63,233,684 60,555,695 2,677,989
790 FEDERAL INCOME TAX ADJUSTMENTS-PLANT P101P (37,229,713) (35,653,010) (1,576,703)
791 FEDERAL INCOME TAX ADJUSTMENTS-OTHER L769 (59,917) (57,159) (2,758)
792 SUM OF OTHER ADJUSTMENTS 25,944,054 24,845,527 1,098,528
793 FEDERAL TAX ON OTHER TAX ADJ AT 21 PERCENT 5,448,251 5,217,561 230,691
794 FEDERAL GENERAL BUSINESS CREDITS P701P 0 0 0
795
796 TOTAL FEDERAL INCOME TAX (16,108,683) (15,313,233) (795,450)
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 43 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
797***TABLE 11-OREGON STATE INCOME TAXES
798
799 NET OPERATING INCOME BEFORE TAXES-OREGON L776 196,455,009 187,075,523 9,379,485
800
801 ALLOWANCE FOR AFUDC P101P 63,233,684 60,555,695 2,677,989
802
803 STATE INCOME TAX ADJUSTMENTS-PLANT P101P (37,229,713) (35,653,010) (1,576,703)
804 STATE INCOME TAX ADJUSTMENTS-OTHER L769 (59,917) (57,159) (2,758)
805 TOTAL STATE INCOME TAX ADJUSTMENTS (37,289,630) (35,710,169) (1,579,461)
806 ADD: MFG DEDUCTION NOT ALLOWED L 769 0 0 0
807
808 TOTAL STATE INCOME TAX ADJUSTMENTS-OREGON 25,944,054 24,845,527 1,098,528
809
810 INCOME SUBJECT TO OREGON TAX 222,399,063 211,921,050 10,478,013
811
812 IERCO TAXABLE INCOME E10 13,361,504 12,803,891 557,613
813 BONUS DEPRECIATION ADJUSTMENT P101P (6,823,240) (6,534,271) (288,969)
814 FEDERAL NOL L 750 0 0 0
815 TOTAL STATE TAXABLE INCOME-OREGON 228,937,327 218,190,670 10,746,657
816 APPORTIONMENT FACTOR(0.045454550) 10,406,243 9,917,759 488,484
817 POST APPORTIONMENT M ITEMS L 757 0 0 0
818 TOTAL TAXABLE INCOME-OREGON 10,406,243 9,917,759 488,484
819
820 OREGON TAX AT6.6PERCENT 686,812 654,572 32,240
821 LESS:INVESTMENT TAX CREDIT P101P 0 0 0
822
823 STATE INCOME TAX ALLOWED-OREGON 686,812 654,572 32,240
824 ADD: FIN 48 ADJUSTMENT L 820 282,224 268,976 13,248
825 PRIOR YEARS'TAX ADJUSTMENT L820 (243,746) (232,304) (11,442)
826
827 STATE INCOME TAX PAID-OREGON 725,290 691,244 34,046
828
M. Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 44 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
829***TABLE 12-IDAHO STATE INCOME TAXES
830
831 NET OPERATING INCOME BEFORE TAXES-IDAHO L 776 196,455,009 187,075,523 9,379,485
832
833 ALLOWANCE FOR AFUDC P101P 63,233,684 60,555,695 2,677,989
834
835 STATE INCOME TAX ADJUSTMENTS-PLANT P101P (37,229,713) (35,653,010) (1,576,703)
836 STATE INCOME TAX ADJUSTMENTS-OTHER L769 (59,917) (57,159) (2,758)
837 STATE INCOME TAX ADJUSTMENTS (37,289,630) (35,710,169) (1,579,461)
838
839 INCOME SUBJECT TO IDAHO TAX 222,399,063 211,921,050 10,478,013
840
841 IERCO TAXABLE INCOME E10 13,361,504 12,803,891 557,613
842 BONUS DEPRECIATION ADJUSTMENT P101P (42,661,135) (40,854,407) (1,806,728)
843 FEDERAL NOL L 750 0 0 0
844 TOTAL STATE TAXABLE INCOME-IDAHO 193,099,432 183,870,534 9,228,898
845
846 IDAHO TAX AT 5.6 PERCENT 10,813,568 10,296,750 516,818
847 LESS:INVESTMENT TAX CREDIT P101P 5,049,613 4,835,759 213,854
848
849 STATE INCOME TAX ALLOWED-IDAHO 5,763,955 5,460,991 302,964
850 ADD: FIN 48 ADJUSTMENT L 846 0 0 0
851 PRIOR YEARS'TAX ADJUSTMENT L846 (5,532,003) (5,267,609) (264,394)
852 STATE INCOME TAX PAID-IDAHO 231,952 193,382 38,570
853
854
855 OTHER STATE INCOME TAX
856 INCOME SUBJECT TO TAX 222,399,063 211,921,050 10,478,013
857
858 IERCO TAXABLE INCOME E10 13,361,504 12,803,891 557,613
859 BONUS DEPRECIATION ADJUSTMENT P701P 0 0 0
860 FEDERAL NOL L 750 0 0 0
861 TOTAL TAXABLE INCOME BEFORE APPORTIONMENT-OTHER STATES 235,760,567 224,724,941 11,035,626
862 POST APPORTIONMENT M ITEMS L 757 0 0 0
863 TOTAL TAXABLE INCOME-OTHER STATES 235,760,567 224,724,941 11,035,626
864
865 OTHER TAX AT0.1PERCENT 235,761 224,725 11,036
866 ADD: FIN 48 ADJUSTMENT L 852 0 0 0
867 PRIOR YEARS'TAX ADJUSTMENT L852 (257,362) (214,567) (42,795)
868 OTHER STATES'INCOME TAX PAID (21,601) 10,158 (31,760)
M. Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 45 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
s
s
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
869***TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCA TOR
870 STEAM POWER GENERATION
871 500-513/TOTAL STEAM GENERATION Dio 442,341 425,076 17,265
872 HYDRAULIC POWER GENERATION
873 535/SUPERVISION&ENGINEERING L 879 4,198,454 4,033,815 164,639
874 536/WATER FOR POWER E70 870,626 834,293 36,334
875 537/HYDRAULIC EXPENSES Dio 6,581,987 6,325,085 256,902
876 538/ELECTRIC EXPENSES D70 1,659,356 1,594,590 64,766
877 539/MISCELLANEOUS EXPENSES Dio 3,733,853 3,588,117 145,736
878540/RENTS Dio 0 0 0
879 TOTAL HYDRAULIC OPERATION EXPENSES 17,044,277 16,375,900 668,377
880 541/SUPERVISION&ENGINEERING L 885 167,910 161,356 6,554
881542/STRUCTURES Dio 567,222 545,083 22,139
882 543/RESERVOIRS,DAMS&WATERWAYS D70 301,175 289,420 11,755
883544/ELECTRIC PLANT Dio 1,724,170 1,656,874 67,296
884 545/MISCELLANEOUS HYDRAULIC PLANT Dio 2,266,086 2,177,638 88,448
885 TOTAL HYDRAULIC MAINTENANCE EXPENSES 5,026,564 4,830,372 196,192
886 TOTAL HYDRAULIC GENERATION EXPENSES 22,070,840 21,206,271 864,569
887 OTHER POWER GENERATION
888 546/SUPERVISION&ENGINEERING L 892 582,577 559,838 22,739
889 548/GENERATING EXPENSES Dio 0 0 0
890 549/MISCELLANEOUS EXPENSES Dio 3,495,474 3,359,042 136,432
891550/RENTS Dio 496,069 476,707 19,362
892 TOTAL OTHER POWER OPER EXPENSES 4,574,120 4,395,587 178,533
893
894 551/SUPERVISION&ENGINEERING L 898 0 0 0
895 552/STRUCTURES D70 47,812 45,946 1,866
896 553/GENERATING&ELECTRIC PLANT Dio 65,753 63,186 2,566
897 554/MISCELLANEOUS EXPENSES Dio 523,281 502,857 20,424
898 TOTAL OTHER POWER MAINT EXPENSES 636,845 611,989 24,857
899 TOTAL OTHER POWER GENERATION EXP 5,210,965 5,007,576 203,389
900 555/PURCHASE POWER E70 0 0 0
901 556/LOAD CONTROL&DISPATCHING EXPENSES D70 0 0 0
902 Dio 4,863,381 4,673,558 189,823
903 TOTAL OTHER POWER SUPPLY EXPENSES 4,863,381 4,673,558 189,823
904
905 TOTAL PRODUCTION EXPENSES 32,587,528 31,312,481 1,275,046
906
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 46 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
907-TABLE"TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
908
909 TRANSMISSION EXPENSES
910 560/SUPERVISION&ENGINEERING L144 2,317,807 2,227,187 90,620
911 561/LOAD DISPATCHING D12 3,373,689 3,242,010 131,679
912 562/STATION EXPENSES L121 1,900,727 1,826,410 74,317
913 563/OVERHEAD LINE EXPENSES L 127+132+137 483,392 464,488 18,905
914 565/TRANSMISSION OF ELECTRICITY BY OTHERS E10 0 0 0
915 566/MISCELLANEOUS EXPENSES L 529 0 0 0
916 567/RENTS L 144 0 0 0
917 TOTAL TRANSMISSION OPERATION 8,075,615 7,760,095 315,520
918 568/SUPERVISION&ENGINEERING L 144 139,203 133,761 5,442
919 569/STRUCTURES L116 1,426,838 1,371,138 55,700
920 570/STATION EQUIPMENT L 121 2,616,011 2,513,727 102,284
921 571/OVERHEAD LINES L 127+132+137 972,477 934,445 38,032
922575/OPER TRANS MKT ADMIN-EIM L144 1,155 1,109 45
923 TOTAL TRANSMISSION MAINTENANCE 5,155,684 4,954,180 201,503
924 TOTAL TRANSMISSION EXPENSES 13,231,299 12,714,275 517,023
925
926 DISTRIBUTION EXPENESES
927 580/SUPERVISION&ENGINEERING L 163 3,237,656 3,085,075 152,581
928 581/LOAD DISPATCHING D60 4,740,713 4,567,808 172,905
929 582/STATION EXPENSES L151 1,048,893 1,006,182 42,711
930583/OVERHEAD LINE EXPENSES L153+154 3,701,154 3,438,194 262,960
931584/UNDERGROUND LINE EXPENSES L155+156 1,636,360 1,611,453 24,907
932 585/STREET LIGHTING&SIGNAL SYSTEMS L 161 1,916 1,821 95
933586/METER EXPENSES L159 4,739,824 4,594,694 145,129
934 587/CUSTOMER INSTALLATIONS EXPENSE L160 857,913 801,672 56,242
935 588/MISCELLANEOUS EXPENSES L 559 2,979,865 2,831,615 148,250
936 589/RENTS L 163 0 0 0
937 TOTAL DISTRIBUTION OPERATION 22,944,293 21,938,513 1,005,780
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 47 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
938-TABLE"TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
939
940
941 590/SUPERVISION&ENGINEERING L 163 7,755 7,390 365
942 591/STRUCTURES L 150 0 0 0
943 592/STATION EQUIPMENT L 151 3,271,354 3,138,143 133,210
944 593/OVERHEAD LINES L153+154 5,418,492 5,033,519 384,973
945 594/UNDERGROUND LINES L 155+156 311,063 306,328 4,735
946 595/LINE TRANSFORMERS L 157 24,796 23,436 1,360
947 596/STREET LIGHTING&SIGNAL SYSTEMS L 161 93,462 88,810 4,652
948 597/METERS L 159 769,699 746,131 23,568
949 598/MISCELLANEOUS PLANT L 163 105,914 100,922 4,991
950 TOTAL DISTRIBUTION MAINTENANCE 10,002,534 9,444,680 557,854
951 TOTAL DISTRIBUTION EXPENSES 32,946,827 31,383,193 1,563,634
952
953 CUSTOMER ACCOUNTING EXPENSES
954 901/SUPERVISION L 959 794,380 759,746 34,634
955 902/METER READING CW902 1,260,207 1,090,088 170,120
956 903/CUSTOMER RECORDS&COLLECTIONS CW903 10,577,395 10,231,412 345,983
957 904/UNCOLLECTIBLE ACCOUNTS CW904 0 0 0
958 905/MISC EXPENSES L 955-957 0 0 0
959 TOTAL CUSTOMER ACCOUNTING EXPENSES 12,631,982 12,081,246 550,736
960
961 CUSTOMER SERVICES&INFORMATION EXPENSES
962 907/SUPERVISION L 965 836,042 793,541 42,501
963 908/CUSTOMER ASSISTANCE L 573 5,242,141 4,975,651 266,490
964 909/INFORMATION&INSTRUCTIONAL L 574 0 0 0
965 910/MISCELLANEOUS EXPENSES L 963+964 384,926 365,358 19,568
966 TOTAL CUST SERV&INFORMATN EXPENSES 6,463,109 6,134,549 328,559
967
968 SALES EXPENSES
969 912/DEMO&SELLING EXPENSES L 579 0 0 0
970 TOTAL SALES EXPENSES 0 0 0
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 48 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
971 ***TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR**'
972
973 ADMINISTRATIVE&GENERAL EXPENSES
974 920/ADMINISTRATIVE&GENERAL SALARIES PTDCAS 58,534,056 56,000,949 2,533,107
975 921/OFFICE SUPPLIES PTDCAS 403,723 386,252 17,471
976 922/ADMIN&GENERAL EXPENSES TRANSFERRED-CR SUSEX 0 0 0
977 923/OUTSIDE SERVICES PTDCAS 0 0 0
978 924/PROPERTY INSURANCE
979 PRODUCTION-STEAM L 100 0 0 0
980 ALL RISK&MISCELLANEOUS P110P 426,708 409,660 17,047
981 TOTAL ACCOUNT 924
982
983 925/INJURIES&DAMAGES LABOR 146,518 140,178 6,340
984 926/EMPLOYEE PENSIONS&BENEFITS LABOR 0 0 0
985 927/FRANCHISE REQUIREMENTS CIDA 0 0 0
986 928/REGULATORY COMMISSION EXPENSES
987 FERC ADMIN ASSESSMENTS L 179 0 0 0
988 FERC RATE CASE EXPENSE RESREV 0 0 0
989 SEC EXPENSES L 179 0 0 0
990 IDAHO PUC-RATE CASE CIDA 0 0 0
991 -OTHER CIDA 0 0 0
992 OREGON PUC-RATE CASE CODA 0 0 0
993 -OTHER CODA 0 0 0
994 TOTAL ACCOUNT 928
995
996 929/DUPLICATE CHARGES SUSEX 0 0 0
997 930.1/GENERAL ADVERTISING RELAB 0 0 0
998 930.2/MISCELLANEOUS EXPENSES PTDCAS 198,088 189,516 8,572
999 931/RENTS L 177 0 0 0
1000935/GENERAL PLANT MAINTENANCE P3908 1,228,809 1,176,768 52,041
1001 TOTAL ADMIN&GENERAL EXPENSES 60,937,902 58,303,323 2,634,579
1002 TOTAL OPER&MAINT EXPENSES 158,798,646 151,929,068 6,869,578
1003
1004 TOTAL LABOR-RATIO 1%) 1 0.9567 0.0433
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 49 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1005+**TABLE 14-ALLOCATION FACTORS*+
1006
1007 CAPACITY RELATED KW
1008 PRODUCTION RELATED COINCIDENT PEAKS @ GENERATION LEVE 310 2,590,726.1 2,489,607.4 101,118.8
1009 SYSTEM TRANSMISSION SERVICE @ GENERATION LEVEL 311 2,590,726.1 2,489,607.4 101,118.8
1010 RETAIL TRANSMISSION D12 2,590,726.1 2,489,607.4 101,118.8
1011 DISTRIBUTION SERVICE @ GENERATION LEVEL D60 2,451,116.3 2,361,718.1 89,398.2
1012
1013 ENERGY RELATED MWH
1014 GENERATION LEVEL(PSP) E10 16,565,959.5 15,874,615.8 691,343.7
1015 RETAIL MWH AT GENERATION LVL E100 16,565,959.5 15,874,615.8 691,343.7
1016 CUSTOMER LEVEL E99 15,270,580.7 14,628,926.1 641,654.6
1017
1018 CUSTOMER RELATED FACTORS
1019 369-DIRECT ASSIGNMENT DA369 70,650,589 67,740,904 2,909,686
1020 370-METER INVESTMENT ACCT370 115,905,804 112,356,866 3,548,937
1021 902-CUSTOMER WEIGHTED CW902 2,122,543 1,836,014 286,529
1022 903-CUSTOMER WEIGHTED CW903 16,141,973 15,613,975 527,998
1023 904-CUSTOMER WEIGHTED CW904 3,786,792 3,419,345 367,446
1024 909-DIRECT ASSIGN-AVG.NO.CUST. DA909 624,419 604,506 19,913
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 50 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1025""TABLE 14-ALLOCATION FACTORS
1026
1027 DIRECT ASSIGNMENTS
1028 252-CUSTOMER ADVANCES DA252 32,170,424 32,110,363 60,062
1029 350-LAND&LAND RIGHTS DA350 0 0 0
1030 352-STRUCTURES&IMPROVEMENTS DA352 658 0 658
1031 353-STATION EQUIPMENT DA353 111,594 75,100 36,494
1032 354-TOWERS&FIXTURES DA354 0 0 0
1033 355-POLES&FIXTURES DA355 33,842 0 33,842
1034 356-OVERHEAD CONDUCTORS&DEVICES DA356 26,495 1,189 25,306
1035 359-ROADS&TRAILS DA359 0 0 0
1036 360-LAND&LAND RIGHTS ACCT360 9,024,558 8,641,897 382,661
1037 361-STRUCTURES&IMPROVEMENTS ACCT361 62,286,419 59,574,241 2,712,178
1038 362-STATION EQUIPMENT ACCT362 333,778,528 320,186,976 13,591,552
1039 364-POLES,TOWERS&FIXTURES DA364 333,422,399 307,301,185 26,121,215
1040 365-OVERHEAD CONDUCTORS&DEVICES DA365 161,939,763 152,866,451 9,073,313
1041 366-UNDERGROUND CONDUIT DA366 55,753,674 54,858,172 895,502
1042 367-UNDERGROUND CONDUCTORS&DEVICES DA367 338,826,990 333,716,692 5,110,297
1043 368-LINE TRANSFORMERS ACCT368 750,275,508 709,131,796 41,143,712
10" 371-INSTALLATIONS ON CUSTOMER PREMISES DA371 5,271,974 4,926,363 345,611
1045 373-STREET LIGHTING SYSTEMS DA373 6,798,038 6,459,698 338,340
1046 451-REVENUE-MISCELLANEOUS SERVICE DA451 5,103,805 5,043,528 60,277
1047 454-REVENUE-FACILITIES CHARGE DA454 10,841,971 10,407,743 434,228
1048 908-OTHER CUSTOMER ASSISTANCE DA908 39,515,607 37,503,939 2,011,668
1049 440-RETAIL SALES REVENUE RETREV 1,394,973,529 1,332,290,085 62,683,444
1050 447-WHOLESALE SALES REVENUE RESREV 0 0 0
1051 RIDER FUND DIRECT ASSIGNMENT DARIDER 31,947,854 30,229,460 1,718,394
1052 411-BOARDMAN ARO ACCRETION EXP DAACCRETION 12,995 12,485 509
1053 403-BOARDMAN ARO DEPRECIATION EXP DAARO 0 0 0
1054 IDAHO CIDA 1 1 0
1055 OREGON CODA 1 0 1
1056 NET TO GROSS TAX MULTIPLIER DA990 1.347 1.347 1.347
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 51 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1057***TABLE 14-ALLOCATION FACTORS
1058
1059 INTERNALLY DEVELOPED ALLOCATION FACTORS
1060 PLANT-PROD,TRANS&DIST PTD 5,626,985,510 5,388,678,911 238,306,599
1061 LAB-PROD,TRANS,DIST,CUSTACCT&CSIS PTDCAS 97,860,745 93,625,745 4,235,000
1062 PLANT-HYDRO,OTHER,TSUBS,DSUBS&GP Pi lop 2,774,311,882 2,663,475,131 110,836,752
1063 PLANT-GEN PLT(390,391,397&398) P3908 294,608,041 282,131,194 12,476,848
1064 PLANT-PROD,TRANS,DIST&GEN P1o1P 6,131,495,853 5,871,822,903 259,672,950
1065 O&M-PROD,TRANS,DIST,CUSTACCT&CSIS SUBEX 993,289,882 950,279,195 43,010,687
1066 LAB-PROD,TRANS,DIST,CUSTACCT&CSIS RELAB 97,860,745 93,625,745 4,235,000
1067 LAB-ALL LABOR WITHOUT925-6"CIRC' LABOR 158,225,421 151,379,230 6,846,191
1068 REV-RETAIL,RESALE&WHEELING FMREV 1,573,649,537 1,503,527,682 70,121,855
1069 O&M-ALL EXCEPT FUEL O&MM 889,292,061 850,317,741 38,974,319
1070 PLANT-89%*HYD PROD+11%*TRANS SURVEY 1,128,416,503 1,084,363,374 44,053,129
1071 O&M-TOTAL(NOT USED) OM401 1,168,004,169 1,117,407,351 50,596,818
M. Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 52 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1072***TABLE 15-ALLOCATION FACTORS-RATIOS
1073
1074 CAPACITY RELATED KW
1075 PRODUCTION RELATED COINCIDENT PEAKS @ GENERATION LEVE D10 100.00% 96.10% 3.90%
1076 SYSTEM TRANSMISSION SERVICE @ GENERATION LEVEL D11 100.00% 96.10% 3.90%
1077 RETAIL TRANSMISSION D12 100.00% 96.10% 3.90%
1078 DISTRIBUTION SERVICE @ GENERATION LEVEL D60 100.00% 96.35% 3.65%
1079
1080 ENERGY RELATED MWH
1081 GENERATION LEVEL(PSP) E10 100.00% 95.83% 4.17%
1082 RETAIL MWH AT GENERATION LVL E100 100.00% 95.83% 4.17%
1083 CUSTOMER LEVEL E99 100.00% 95.80% 4.20%
1084
1085 CUSTOMER RELATED FACTORS
1086 369-DIRECT ASSIGNMENT DA369 100.00% 95.88% 4.12%
1087 370-METER INVESTMENT ACCT370 100.00% 96.94% 3.06%
1088 902-CUSTOMER WEIGHTED CW902 100.00% 86.50% 13.50%
1089 903-CUSTOMER WEIGHTED CW903 100.00% 96.73% 3.27%
1090 904-CUSTOMER WEIGHTED CW904 100.00% 90.30% 9.70%
1091 909-DIRECT ASSIGN-AVG.NO.CUST. DA909 100.00% 96.81% 3.19%
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 53 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1092"*"TABLE 15-ALLOCATION FACTORS-RATIOS
1093
1094 DIRECT ASSIGNMENTS
1095 252-CUSTOMER ADVANCES DA252 100.00% 99.81% 0.19%
1096 350-LAND&LAND RIGHTS DA350 #DIV/01 #DIV/01 #DIV/0I
1097 352-STRUCTURES&IMPROVEMENTS DA352 100.00% 0.00% 100.00%
1098 353-STATION EQUIPMENT DA353 100.00% 67.30% 32.70%
1099 354-TOWERS&FIXTURES DA354 #DIV/01 #DIV/01 #DIV/0I
1100 355-POLES&FIXTURES DA355 100.00% 0.00% 100.00%
1101 356-OVERHEAD CONDUCTORS&DEVICES DA356 100.00% 4.49% 95.51%
1102 359-ROADS&TRAILS DA359 #DIV/01 #DIV/01 #DIV/0I
1103 360-LAND&LAND RIGHTS ACCT360 100.00% 95.76% 4.24%
1104 361-STRUCTURES&IMPROVEMENTS ACCT361 100.00% 95.65% 4.35%
1105 362-STATION EQUIPMENT ACCT362 100.00% 95.93% 4.07%
1106 364-POLES,TOWERS&FIXTURES DA364 100.00% 92.17% 7.83%
1107 365-OVERHEAD CONDUCTORS&DEVICES DA365 100.00% 94.40% 5.60%
1108 366-UNDERGROUND CONDUIT DA366 100.00% 98.39% 1.61%
1109 367-UNDERGROUND CONDUCTORS&DEVICES DA367 100.00% 98.49% 1.51%
1110 368-LINE TRANSFORMERS ACCT368 100.00% 94.52% 5.48%
1111 371-INSTALLATIONS ON CUSTOMER PREMISES DA371 100.00% 93.44% 6.56%
1112 373-STREET LIGHTING SYSTEMS DA373 100.00% 95.02% 4.98%
1113 451-REVENUE-MISCELLANEOUS SERVICE DA451 100.00% 98.82% 1.18%
1114 454-REVENUE-FACILITIES CHARGE DA454 100.00% 95.99% 4.01%
1115 908-OTHER CUSTOMER ASSISTANCE DA908 100.00% 94.91% 5.09%
1116 440-RETAIL SALES REVENUE RETREV 100.00% 95.51% 4.49%
1117 447-WHOLESALE SALES REVENUE RESREV #DIV/01 #DIV/01 #DIV/0I
1118 IDAHO CIDA 100.00% 100.00% 0.00%
1119 OREGON CODA 100.00% 0.00% 100.00%
1120 NET TO GROSS TAX MULTIPLIER DA990 1.347 1.347 1.347
M.Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 54 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 SYSTEM PER BOOKS
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1121 ***TABLE 15-ALLOCATION FACTORS-RATIOS
1122
1123 INTERNALLY DEVELOPED ALLOCATION FACTORS
1124 PLANT-PROD,TRANS&DIST PTO 100.00% 95.76% 4.24%
1125 LAB-PROD,TRANS,DIST,CUSTACCT&CSIS PTDCAS 100.00% 95.67% 4.33%
1126 PLANT-HYDRO,OTHER,TSUBS,DSUBS&GP P110P 100.00% 96.00% 4.00%
1127 PLANT-GEN PLT(390,391,397&398) P3908 100.00% 95.76% 4.24%
1128 PLANT-PROD,TRANS,DIST&GEN P101P 100.00% 95.76% 4.24%
1129 O&M-PROD,TRANS,DIST,CUSTACCT&CSIS SUBEX 100.00% 95.67% 4.33%
1130 LAB-PROD,TRANS,DIST,CUST ACCT&CSIS RELAB 100.00% 95.67% 4.33%
1131 LAB-ALL LABOR WITHOUT925-6 'CIRC" LABOR 100.00% 95.67% 4.33%
1132 REV-RETAIL,RESALE&WHEELING FMREV 100.00% 95.54% 4.46%
1133 O&M-ALL EXCEPT FUEL O&M M 100.00% 95.62% 4.38%
1134 PLANT-89%*HYD PROD+11%*TRANS SURVEY 100.00% 96.10% 3.90%
1135 O&M-TOTAL(NOT USED) OM401 100.00% 95.67% 4.33%
M. Larkin Workpaper
Case No. IPC-E-24-07
JSS-ACTUAL Page 55 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
9"*"SUMMARY OF RESULTS
10
11 DEVELOPMENT OF RATE BASE COMPONENTS
12
13 ELECTRIC PLANT IN SERVICE 6,238,594,514 5,972,718,153 265,876,361
14 LESS:A000M PROVISION FOR DEPRECIATION 2,101,711,378 2,011,557,947 90,153,431
15 AMORT OF OTHER UTILITY PLANT 42,200,082 40,502,357 1,697,725
16 NET ELECTRIC PLANT IN SERVICE 4,094,683,054 3,920,657,849 174,025,205
17 LESS:CUSTOMER ADV FOR CONSTRUCTION 32,170,424 32,110,363 60,062
18 LESS:A000M DEFERRED INCOME TAXES 384,499,355 367,946,855 16,552,500
19 ADD:PLT HLD FOR FUTURE+ACQUIS ADJ 8,577,985 8,249,279 328,706
20 ADD:WORKING CAPITAL 139,484,205 133,389,045 6,095,160
21 ADD:CONSERVATION+OTHER DFRD FROG. 26,912,065 21,708,887 5,203,177
22 ADD:SUBSIDIARY RATE BASE 36,192,061 34,665,124 1,526,937
23
24 TOTAL COMBINED RATE BASE 3,889,179,591 3,718,612,966 170,566,624
25
26 RATE OF RETURN UNDER PRESENT RATES
27 OPERATING REVENUES
28 SALES REVENUES 1,101,054,805 1,046,577,506 54,477,299
29 OTHER OPERATING REVENUES 90,445,486 86,982,183 3,463,302
30 TOTAL OPERATING REVENUES 1,191,500,290 1,133,559,689 57,940,601
31 OPERATING EXPENSES
32 OPERATION&MAINTENANCE EXPENSES 711,387,262 679,108,466 32,278,796
33 DEPRECIATION EXPENSE 152,945,996 146,565,749 6,380,247
34 AMORTIZATION OF LIMITED TERM PLANT 6,684,092 6,409,265 274,827
35 ACCRETION EXPENSE 12,995 12,485 509
36 TAXES OTHER THAN INCOME 25,554,161 23,438,631 2,115,530
37 REGULATORY DEBITS/CREDITS 1,846,154 1,528,445 317,709
38 PROVISION FOR DEFERRED INCOME TAXES (18,597,487) (17,767,464) (830,024)
39 INVESTMENT TAX CREDIT ADJUSTMENT 50,193,136 48,052,692 2,140,444
40 FEDERAL INCOME TAXES (22,852,451) (21,350,498) (1,501,953)
41 STATE INCOME TAXES (7,421,934) (7,214,035) (207,900)
42 TOTAL OPERATING EXPENSES 899,751,923 858,783,738 40,968,185
43 OPERATING INCOME 291,748,367 274,775,950 16,972,416
44 ADD: IER00 OPERATING INCOME Eio 8,033,987 7,695,035 338,953
45 CONSOLIDATED OPERATING INCOME 299,782,354 282,470,985 17,311,369
46
47 RATE OF RETURN UNDER PRESENT RATES 7.708% 7.596% 10.149%
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 56 of 202
Results of Operations Model

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
48"'SUMMARY OF RESULTS
49
50 RATE OF RETURN UNDER PRESENT RATES
51 TOTAL COMBINED RATE BASE 3,889,179,591 3,718,612,966 170,566,624
52
53 SALES REVENUES 1,101,054,805 1,046,577,506 54,477,299
54 OTHER OPERATING REVENUES 90,445,486 86,982,183 3,463,302
55 TOTAL OPERATING REVENUES 1,191,500,290 1,133,559,689 57,940,601
56 OPERATING EXPENSES
57 OPERATION 8 MAINTENANCE EXPENSES 711,387,262 679,108,466 32,278,796
58 DEPRECIATION EXPENSE 152,945,996 146,565,749 6,380,247
59 AMORTIZATION OF LIMITED TERM PLANT 6,684,092 6,409,265 274,827
60 ACCRETION EXPENSE 12,995 12,485 509
61 TAXES OTHER THAN INCOME 25,554,161 23,438,631 2,115,530
62 REGULATORY DEBITS/CREDITS 1,846,154 1,528,445 317,709
63 PROVISION FOR DEFERRED INCOME TAXES (18,597,487) (17,767,464) (830,024)
64 INVESTMENT TAX CREDIT ADJUSTMENT 50,193,136 48,052,692 2,140,444
65 FEDERAL INCOME TAXES (22,852,451) (21,350,498) (1,501,953)
66 STATE INCOME TAXES (7,421,934) (7,214,035) (207,900)
67 TOTAL OPERATING EXPENSES 899,751,923 858,783,738 40,968,185
68 OPERATING INCOME 291,748,367 274,775,950 16,972,416
69 ADD: IER00 OPERATING INCOME 8,033,987 7,695,035 338,953
70 CONSOLIDATED OPERATING INCOME 299,782,354 282,470,985 17,311,369
71 RATE OF RETURN UNDER PRESENT RATES 7.708% 7.596% 10.149%
72
73 DEVELOPMENT OF REVENUE REQUIREMENTS
74 RATE OF RETURN REQUIRED(BASED ON 10%ROE) 7.863% 7.863% 7.863%
75
76 RETURN AT CLAIMED RATE OF RETURN 305,806,191 292,394,538 13,411,654
77 EARNINGS DEFICIENCY 6,023,837 9,923,552 (3,899,715)
78 ADD:CWIP(RELICENSING) 6,815,472 6,520,122 295,350
79 DEFICIENCY WITH CWIP 12,839,309 16,443,674 (3,604,365)
80
81 NET-TO-GROSS TAX MULTIPLIER 1.347 1.347 1.347
82
83 REVENUE DEFICIENCY 17,294,549 22,149,629 (4,855,080)
84
85 FIRM JURISDICTIONAL REVENUES 1,049,319,652 997,025,050 52,294,601
86
87 PERCENT INCREASE REQUIRED 1.65% 2 22% -9 28%
88
89 SALES AND WHEELING REVENUES REQUIRED 1,066,614,201 1,019,174,680 47,439,521
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 57 of 202
Results of Operations Model

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
3 DESCRIPTION SOURCE SYSTEM IPUC OPUC
90"'"TABLE 1-ELECTRIC PLANT IN SERVICE
91
92 INTANGIBLE PLANT
93 301-ORGANIZATION P1o1P 5,703 5,460 243
94302-FRANCHISES&CONSENTS D10 52,232,057 50,167,887 2,064,170
95303-MISCELLANEOUS P101P 54,860,902 52,521,405 2,339,497
96
97 TOTAL INTANGIBLE PLANT 107,098,661 102,694,751 4,403,910
98
99 PRODUCTION PLANT
100 310-316/STEAM PRODUCTION Dio 267,538,090 256,965,193 10,572,897
101330-336/HYDRAULIC PRODUCTION D10 1,100,725,931 1,057,226,100 43,499,832
102 340-346/OTHER PRODUCTION-LANGLEY D70 410,062,584 393,857,230 16,205,354
103 340-346/OTHER PRODUCTION-DANSKIN/BENNETT MTN D70 199,966,966 192,064,427 7,902,539
104
105 TOTAL PRODUCTION PLANT 1,978,293,572 1,900,112,950 78,180,621
106
107 TRANSMISSION PLANT
108 350/LAND&LAND RIGHTS
109 SYSTEM TRANSMISSION SERVICE D11 41,300,354 39,668,196 1,632,158
110 DIRECT ASSIGNMENT DA350 0 0 0
111 TOTAL ACCOUNT350 41,300,354 39,668,196 1,632,158
112
113 352/STRUCTURES&IMPROVEMENTS
114 SYSTEM TRANSMISSION SERVICE Dii 102,251,406 98,210,510 4,040,896
115 DIRECT ASSIGNMENT DA352 658 0 658
116 TOTAL ACCOUNT 352 102,252,064 98,210,510 4,041,554
117
118 353/STATION EQUIPMENT
119 SYSTEM TRANSMISSION SERVICE Dll 470,680,037 452,079,128 18,600,908
120 DIRECT ASSIGNMENT DA353 111,594 75,100 36,494
121 TOTAL ACCOUNT 353 470,791,630 452,154,228 18,637,402
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 58 of 202
Results of Operations Model

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
122"**TABLE 1-ELECTRIC PLANT IN SERVICE
123
124 354/TOWERS&FIXTURES
125 SYSTEM TRANSMISSION SERVICE Dii 232,732,978 223,535,552 9,197,426
126 DIRECT ASSIGNMENT DA354 0 0 0
127 TOTAL ACCOUNT354 232,732,978 223,535,552 9,197,426
128
129 355/POLES&FIXTURES
130 SYSTEM TRANSMISSION SERVICE DII 235,909,163 226,586,217 9,322,946
131 DIRECT ASSIGNMENT DA355 33,842 0 33,842
132 TOTAL ACCOUNT 355 235,943,004 226,586,217 9,356,788
133
134 356/OVERHEAD CONDUCTORS&DEVICES
135 SYSTEM TRANSMISSION SERVICE 311 269,020,474 258,388,994 10,631,480
136 DIRECT ASSIGNMENT DA356 26,495 1,189 25,306
137 TOTAL ACCOUNT 356 269,046,969 258,390,183 10,656,786
138
139 359/ROADS&TRAILS
140 SYSTEM TRANSMISSION SERVICE D11 391,407 375,938 15,468
141 DIRECT ASSIGNMENT DA359 0 0 0
142 TOTAL ACCOUNT 359 391,407 375,938 15,468
143
144 TOTAL TRANSMISSION PLANT 1,352,458,407 1,298,920,825 53,537,582
M. Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 59 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
145"*"TABLE 1-ELECTRIC PLANT IN SERVICE*"'
146
147 DISTRIBUTION PLANT
148
149 360/LAND&LAND RIGHTS ACCT360 9,024,558 8,641,897 382,661
150 361/STRUCTURES&IMPROVEMENTS ACCT361 62,286,419 59,574,241 2,712,178
151 362/STATION EQUIPMENT ACCT362 333,778,528 320,186,976 13,591,552
152 363/BATTERY STORAGE D70 52,299,287 50,232,460 2,066,827
153364/POLES,TOWERS&FIXTURES DA364 333,422,399 307,301,185 26,121,215
154 365/OVERHEAD CONDUCTORS&DEVICES DA365 161,939,763 152,866,451 9,073,313
155 366/UNDERGROUND CONDUIT DA366 55,753,674 54,858,172 895,502
156 367/UNDERGROUND CONDUCTORS&DEVICES DA367 338,826,990 333,716,692 5,110,297
157368/LINE TRANSFORMERS ACCT368 750,275,508 709,131,796 41,143,712
158 369/SERVICES DA369 70,650,589 67,740,904 2,909,686
159 370/METERS ACCT370 115,905,804 112,356,866 3,548,937
160 371/INSTALLATIONS ON CUSTOMER PREMISES DA371 5,271,974 4,926,363 345,611
161 373/STREET LIGHTING SYSTEMS DA373 6,798,038 6,459,698 338,340
162
163 TOTAL DISTRIBUTION PLANT 2,296,233,531 2,187,993,701 108,239,831
164
165 GENERAL PLANT
166 389/LAND&LAND RIGHTS PTD 21,009,062 20,113,149 895,914
167 390/STRUCTURES&IMPROVEMENTS PTD 160,648,651 153,797,926 6,850,726
168 391/OFFICE FURNITURE&EQUIPMENT PTD 41,685,122 39,907,495 1,777,627
169 392/TRANSPORTATION EQUIPMENT PTD 123,353,458 118,093,154 5,260,304
170 393/STORES EQUIPMENT PTD 5,755,716 5,510,269 245,448
171 394/TOOLS,SHOP&GARAGE EQUIPMENT PTD 15,329,002 14,675,310 653,692
172 395/LABORATORY EQUIPMENT PTD 15,855,583 15,179,435 676,148
173 396/POWER OPERATED EQUIPMENT PTD 28,599,480 27,379,879 1,219,601
174 397/COMMUNICATIONS EQUIPMENT PTD 81,280,140 77,814,017 3,466,123
175 398/MISCELLANEOUS EQUIPMENT PTD 10,994,128 10,525,292 468,835
176
177 TOTAL GENERAL PLANT 504,510,343 482,995,926 21,514,417
178
179 TOTAL ELECTRIC PLANT IN SERVICE 6,238,594,514 5,972,718,153 265,876,361
180
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 60 of 202
Results of Operations Model

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
3 DESCRIPTION SOURCE SYSTEM IPUC OPUC
181 ***TABLE 2-ACCUMULATED PROVISION FOR DEPRECIATION*'
182
183 PRODUCTION PLANT
184 310-316/STEAM PRODUCTION L 100 153,765,621 147,688,923 6,076,698
185 330-336/HYDRAULIC PRODUCTION L 101 512,754,704 492,491,038 20,263,667
186 340-346 1 OTHER PRODUCTION-LANGLEY L102 95,159,263 91,398,643 3,760,620
187 340-346/OTHER PRODUCTION-DANSKIN/BENNETT MTN L 103 68,669,762 65,955,987 2,713,776
188 TOTAL PRODUCTION PLANT 830,349,351 797,534,591 32,814,760
189
190 TRANSMISSION PLANT
191350/LAND&LAND RIGHTS L111 10,201,875 9,798,705 403,170
192 352/STRUCTURES&IMPROVEMENTS L116 34,058,667 32,712,485 1,346,183
193 353/STATION EQUIPMENT L 121 124,688,673 119,752,577 4,936,097
194 354/TOWERS&FIXTURES L127 80,392,736 77,215,678 3,177,058
195 355/POLES&FIXTURES L 132 80,537,242 77,343,378 3,193,864
196 356 1 OVERHEAD CONDUCTORS&DEVICES L137 90,159,176 86,588,026 3,571,150
197 359/ROADS&TRAILS L 142 297,401 285,648 11,753
198 TOTAL TRANSMISSION PLANT 420,335,771 403,696,497 16,639,275
199
200 DISTRIBUTION PLANT
201 360/LAND&LAND RIGHTS L 149 238,694 228,573 10,121
202 361/STRUCTURES&IMPROVEMENTS L 150 16,775,015 16,044,569 730,445
203 362/STATION EQUIPMENT L 151 73,815,771 70,809,973 3,005,798
204 363/BATTERY STORAGE L 152 2,119,638 2,035,872 83,766
205 364/POLES,TOWERS&FIXTURES L 153 147,442,487 135,891,443 11,551,044
206 365/OVERHEAD CONDUCTORS&DEVICES L154 58,337,149 55,068,580 3,268,568
207 366/UNDERGROUND CONDUIT L 155 19,489,437 19,176,403 313,035
208 367/UNDERGROUND CONDUCTORS&DEVICES L 156 106,268,599 104,665,822 1,602,777
209 368/LINE TRANSFORMERS L 157 200,358,987 189,371,673 10,987,314
210 369/SERVICES L 158 45,543,867 43,668,181 1,875,686
211 370/METERS L 159 38,148,217 36,980,151 1,168,066
212 3711 INSTALLATIONS ON CUSTOMER PREMISES L 160 1,077,809 1,007,152 70,657
213 373/STREET LIGHTING SYSTEMS L 161 955,404 907,853 47,551
214 TOTAL DISTRIBUTION PLANT 710,571,075 675,856,245 34,714,829
215
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 61 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
216***TABLE 2-ACCUMULATED PROVISION FOR DEPRECIATION
217
218 GENERAL PLANT
219 389/LAND&LAND RIGHTS L 166 0 0 0
220 390/STRUCTURES&IMPROVEMENTS L167 36,426,504 34,873,127 1,553,377
221 3911 OFFICE FURNITURE&EQUIPMENT L 168 18,653,154 17,857,706 795,448
222 392/TRANSPORTATION EQUIPMENT L 169 25,286,446 24,208,127 1,078,319
223 393/STORES EQUIPMENT L 170 1,470,235 1,407,538 62,697
224 394/TOOLS,SHOP&GARAGE EQUIPMENT L 171 4,949,524 4,738,456 211,068
225 395/LABORATORY EQUIPMENT L 172 6,894,447 6,600,439 294,008
226 3961 POWER OPERATED EQUIPMENT L 173 5,668,406 5,426,682 241,724
227 397/COMMUNICATIONS EQUIPMENT L 174 33,442,226 32,016,111 1,426,115
228 398/MISCELLANEOUS EQUIPMENT L 175 4,366,845 4,180,625 186,220
229 TOTAL GENERAL PLANT 137,157,788 131,308,810 5,848,978
230
231 UNDER-/OVERALLOCATED SALVAGE L 97 0 0 0
232 TOTAL DEPR BEFORE FAS143/OTHER 2,098,413,985 2,008,396,143 90,017,842
233
234 FAS 143 ADJ&/OR DISALLOWED COSTS Li 3,297,393 ` 3,161,804 135,589
235 TOTAL ACCUM PROVISION DEPRECIATION 2,101,711,378 2,011,557,947 90,153,431
236
237 AMORTIZATION OF OTHER UTILITY PLANT
238 INTANGIBLE PLANT L 97 18,746,010 17,975,171 770,838
239 HYDRAULIC PRODUCTION L101 23,454,072 22,527,185 926,887
240
241 TOTAL AMORT OF OTHER UTILITY PLANT 42,200,082 40,502,357 1,697,725
242
243 TOTAL ACCUM PROVISION FOR DEPR
244 &AMORTIZATION OF OTHER UTILITY PLANT 2,143,911,460 2,052,060,304 91,851,156
245
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 62 of 202
Results of Operations Model

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
3 DESCRIPTION SOURCE SYSTEM IPUC OPUC
246"'`TABLE 3-ADDITIONS&DELETIONS TO RATE BASE'"
247
248 NET ELECTRIC PLANT IN SERVICE 4,094,683,054 3,920,657,849 174,025,205
249 LESS:
250 252 CUSTOMER ADVANCES FOR CONSTRUCTION
251 POWER SUPPLY D70 0 0 0
252 OTHER DA252 32,170,424 32,110,363 60,062
253 TOTAL CUSTOMER ADV FOR CONSTRUCTION 32,170,424 32,110,363 60,062
254
255 ACCUMULATED DEFERRED INCOME TAXES
256 190/ACCUMULATED DEFERRED INCOME TAXES
257 CUSTOMER ADVANCES FOR CONSTRUCTION DA252 (3,854,109) (3,846,913) (7,196)
258 OTHER LABOR (13,759,745) (13,171,663) (588,082)
259 TOTAL ACCOUNT190 (17,613,854) (17,018,577) (595,277)
260281/ACCELERATED AMORTIZATION P1o1P 0 0 0
261282/OTHER PROPERTY P701P 391,932,337 375,218,714 16,713,623
262 283/OTHER P701P 10,180,872 9,746,717 434,155
263 TOTAL ACCUM DEFERRED INCOME TAXES 384,499,355 367,946,855 16,552,500
264
265 NET ELECTRIC PLANT IN SERVICE 3,678,013,275 3,520,600,631 157,412,644
266 ADD:
267 WORKING CAPITAL
268 151/FUEL INVENTORY E10 19,716,209 18,884,385 831,824
269 154/PLANT MATERIALS&SUPPLIES
270 PRODUCTION-GENERAL L 105 14,733,716 14,151,451 582,265
271 TRANSMISSION-GENERAL L143 32,918,344 31,615,259 1,303,085
272 DISTRIBUTION-GENERAL L 163 67,378,274 64,202,198 3,176,076
273 OTHER-UNCLASSIFIED L 179 4,737,661 4,535,751 201,910
274 TOTAL ACCOUNT154 119,767,996 114,504,660 5,263,336
275 165/PREPAID ITEMS
276 AD VALOREM TAXES L 707 0 0 0
277 OTHER PROD-RELATED PREPAYMENTS D70 0 0 0
278 INSURANCE L 105 0 0 0
279 PENSION-RELATED PREPAYMENTS L 1002 0 0 0
280 SOFTWARE CONTRACTS L 95 0 0 0
281 MISCELLANEOUS PREPAYMENTS P1o1P 0 0 0
282 TOTAL ACCOUNT 165 0 0 0
283 WORKING CASH ALLOWANCE L 623 0 0 0
284
285 TOTAL WORKING CAPITAL 139,484,205 133,389,045 6,095,160
286
287 NET ELECTRIC PLANT IN SERVICE 3,817,497,480 3,653,989,677 163,507,804
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 63 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
288"*"TABLE 3-ADDITIONS&DELETIONS TO RATE BASE'"
289
290 NET ELECTRIC PLANT IN SERVICE 3,817,497,480 3,653,989,677 163,507,804
291 ADD:
292 105/PLANT HELD FOR FUTURE USE
293 HYDRAULIC PRODUCTION L 101 0 0 0
294 TRANS LAND&LAND RIGHTS L 111 2,906,703 2,791,832 114,871
295 TRANS STRUCTURES&IMPROVEMENTS L 116 0 0 0
296 TRANS STATION EQUIPMENT L 121 0 0 0
297 DIST LAND&LAND RIGHTS L 149 5,043,035 4,829,199 213,836
298 DIST STRUCTURES&IMPROVEMENTS L 150 0 0 0
299 GEN LAND&LAND RIGHTS L 166 0 0 0
300 GEN STRUCTURES&IMPROVEMENTS L 167 0 0 0
301 TOTAL PLANT HELD FOR FUTURE USE 7,949,738 7,621,031 328,706
302
303 ELECTRIC PLANT ACQUISITION ADJ:114/5 CIDA 628,247 628,247 0
304
305 DEFERRED PROGRAMS:
306182/CONSERVATION PROGRAMS
307 IDAHO DEFERRED CONSERVATION PROGRAMS CIDA 0 0 0
308 OREGON DEFERRED CONSERVATION PROGRAMS CODA 0 0 0
309 TOTAL CONSERVATION PROGRAMS 0 0 0
310 182/MISC.OTHER REGULATORY ASSETS
311 CUB FUND INTEREST-OPUC ORDER 15-399 CODA 59,702 0 59,702
312 AM.FALLS BOND REFINANCE D70 72,977 70,093 2,884
313 SFAS 87 CAPITALIZED PENSION-OPUC ORDER 10-064 CODA 7,096,835 0 7,096,835
314 CLOUD COMPUTING-IPUC ORDER 34707 CIDA 1,250,083 1,250,083 0
315 WILDFIRE MITIGATION-IPUC ORDER 35077 CIDA 0 0 0
316 SIEMENS LTP DEFERRED RATE BASE-IPUC ORDER 33420 CIDA 8,181,006 8,181,006 0
317 SIEMENS LTP RATE BASE-IPUC ORDER 33420 CIDA 12,207,705 12,207,705 0
318 SIEMENS LTP DEFERRED RATE BASE-OPUC ORDER 15-387 CODA 343,307 0 343,307
319 SIEMENS LTP RATE BASE-OPUC ORDER 15-387 CODA 471,789 0 471,789
320 TOTAL OTHER REGULATORY ASSETS 29,683,405 21,708,887 7,974,517
321 186/MISC.OTHER DEFERRED PROGRAMS EIO 0 0 0
322 254/JIM BRIDGER PLANT END OF LIFE DEPR-OPUC ORD 12-296 CODA (2,753,872) 0 (2,753,872)
323 RECONNECT FEES-OPUC ADV 16-09 CODA (17,468) 0 (17,468)
324 TOTAL DEFERRED PROGRAMS 26,912,065 21,708,887 5,203,177
325
326 DEVELOPMENT OF IERCO RATE BASE
327 INVESTMENT IN IERCO EIO 18,375,460 17,600,202 775,258
328 PREPAID COAL ROYALTIES EIO 606,862 581,259 25,603
329 NOTES RECEIVABLE FROM SUBSIDIARY E10 17,209,739 16,483,663 726,076
330 TOTAL SUBSIDIARY RATE BASE 36,192,061 34,665,124 1,526,937
331
332 TOTAL COMBINED RATE BASE 3,889,179,591 3,718,612,966 170,566,624
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 64 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
333***TABLE 4-OPERATING REVENUES*"
334 OPERATING REVENUES
335 FIRM ENERGY SALES
336 440-448/RETAIL RETREV 1,049,319,652 997,025,050 52,294,601
337 447/ FIRM SALES FOR RESALE E10 0 0 0
338447/SYSTEM OPPORTUNITY SALES E10 51,735,153 49,552,455 2,182,698
339 TOTAL SALES OF ELECTRICITY 1,101,054,805 1,046,577,506 54,477,299
340
341 OTHER OPERATING REVENUES
342 415/MERCHANDISING REVENUES D60 4,655,894 4,483,811 -
343
344 449/OATT TARIFF REFUND
345 NETWORK D11 0 0 0
346 POINT-TO-POINT D11 0 0 0
347 TOTALACCOUNT449 0 0 0
348
349 451/MISCELLANEOUS SERVICE REVENUES DA451 5,220,513 5,158,858 61,655
350
351 454/RENTS FROM ELECTRIC PROPERTY
352 SUBSTATION EQUIPMENT L121 3,272,778 3,143,217 129,561
353 TRANSFORMER RENTALS D11 17,330 16,645 -
354 LINE RENTALS 311 0 0 0
355 COGENERATION L490 1,896,418 1,816,408 80,010
356 DARK FIBER PROJECT CIDA 66,667 66,667 0
357 POLE ATTACHMENTS L 153 1,756,476 1,618,869 137,607
358 FACILITIES CHARGES DA454 10,841,971 10,407,743 434,228
359 OTHER RENTALS L101 1,246,139 1,196,893 49,246
360 WATER LEASE E10 66,960 64,135 2,825
361 TOTALACCOUNT454 19,164,738 18,330,576 834,162
362
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 65 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
363 456/OTHER ELECTRIC REVENUES
364 TRANSMISSION-NETWORK SERVICES D11 10,740,800 10,316,332 424,468
365 TRANSMISSION-NETWORK SERVICES-DISTFACILITIES D60 765,132 736,853 28,279
366 TRANSMISSION-POINT-TO-POINT D71 49,148,205 47,205,906 1,942,299
367 ALTERNATE TRANSMISSION SERV.CHG. L 144 0 0 0
368 PHOTOVOLTAIC STATION SERVICE L 163 0 0 0
369 DSM RIDER FUNDS DARIDER 0 0 0
370 STANDBY SERVICE CHARGE CIDA 741,858 741,858 0
371 SIERRA PACIFIC USAGE CHARGE Eio 0 0 0
372 BPA-OTHER REVENUE Dio 0 0 0
373 ANTELOPE L 515 0 0 0
374 MISCELLANEOUS PTD 8,346 7,990 356
375 TOTALACCOUNT456 61,404,340 59,008,938 2,395,402
376
377 TOTAL OTHER OPERATING REVENUES 90,445,486 86,982,183 3,463,302
378
379 TOTAL OPERATING REVENUES 1,191,500,290 1,133,559,689 57,940,601
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 66 of 202
Results of Operations Model

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
380"'"TABLE 5-OPERATION&MAINTENANCE EXPENSES
381
382 STEAM POWER GENERATION
383 OPERATION
384500/SUPERVISION&ENGINEERING D10 (151,022) (145,054) (5,968)
385 501/FUEL E10 108,503,180 103,925,449 4,577,731
386
387 502/STEAM EXPENSES
388 LABOR DIO 0 0 0
389 OTHER E10 (2,000) (1,916) (84)
390 TOTAL ACCOUNT 502 (2,000) (1,916) (84)
391 505/ELECTRIC EXPENSES
392 LABOR DIO 0 0 0
393 OTHER E10 (0) (0) (0)
394 TOTAL ACCOUNT 505 (0) (0) (0)
395 506/MISCELLANEOUS EXPENSES DIO 80 77 3
396 507/RENTS L 100 0 0 0
397 TOTAL STEAM OPERATION EXPENSES 108,350,238 103,778,556 4,571,682
398
399 MAINTENANCE
400 510/SUPERVISION&ENGINEERING DIO (282,132) (270,982) (11,150)
401 511 /STRUCTURES DIO (0) (0) (0)
402 512/BOILER PLANT
403 LABOR D10 0 0 0
404 OTHER E10 0 0 0
405 TOTAL ACCOUNT 512 0 0 0
406 513/ELECTRIC PLANT
407 LABOR DIO 0 0 0
408 OTHER E10 0 0 0
409 TOTAL ACCOUNT 513 0 0 0
410 514/MISCELLANEOUS STEAM PLANT D10 0 0 0
411 TOTAL STEAM MAINTENANCE EXPENSES (282,131) (270,982) (11,150)
412
413 TOTAL STEAM GENERATION EXPENSES 108,068,106 103,507,574 4,560,532
414
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 67 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
415"*"TABLE 5-OPERATION&MAINTENANCE EXPENSES
416
417 HYDRAULIC POWER GENERATION
418 535/SUPERVISION&ENGINEERING L 879 5,375,972 5,162,545 213,427
419 536/WATER FOR POWER
420 WATER LEASE D70 2,380,597 2,286,518 94,079
421 OTHER DIO 3,314,616 3,183,625 130,991
422 TOTAL ACCOUNT 536 5,695,213 5,470,143 225,070
423
424 537/HYDRAULIC EXPENSES DIO 19,074,474 18,320,666 753,808
425 538/ELECTRIC EXPENSES
426 LABOR DIO 1,673,365 1,607,234 66,130
427 OTHER E10 513,003 491,360 21,644
428 TOTAL ACCOUNT 538 2,186,368 2,098,594 87,774
429
430 539/MISCELLANEOUS EXPENSES DIO 5,560,208 5,340,473 219,735
431 540/RENTS DIO 311,854 299,530 12,324
432
433 TOTAL HYDRAULIC OPERATION EXPENSES 38,204,089 36,691,950 1,512,139
434
435 MAINTENANCE
436 541/SUPERVISION&ENGINEERING L 885 199,803 191,907 7,896
437 542/STRUCTURES DIO 931,301 894,497 36,804
438 543/RESERVOIRS,DAMS&WATERWAYS D10 2,275,232 2,185,316 89,915
439 544/ELECTRIC PLANT
440 LABOR D10 1,738,725 1,670,012 68,713
441 OTHER E10 697,230 667,814 29,416
442 TOTAL ACCOUNT544 2,435,955 2,337,826 98,129
443
444 545/MISCELLANEOUS HYDRAULIC PLANT L 101 3,530,095 3,390,588 139,507
445
446 TOTAL HYDRAULIC MAINTENANCE EXPENSES 9,372,386 9,000,135 372,251
447
448 TOTAL HYDRAULIC GENERATION EXPENSES 47,576,475 45,692,085 1,884,390
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 68 of 202
Results of Operations Model

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
449"'"TABLE 5-OPERATION&MAINTENANCE EXPENSES
450 OTHER POWER GENERATION
451 OPERATION
452 546/SUPERVISION&ENGINEERING L 892 660,492 634,389 26,102
453 547/FUEL
454 SALMON DIESEL E10 16,517 15,820 697
455 OTHER E10 33,367,563 31,959,791 1,407,772
456 TOTAL ACCOUNT 547 33,384,080 31,975,611 1,408,469
457
458 548/GENERATING EXPENSES
459 LABOR DIO 29,508 28,342 1,166
460 OTHER E10 5,285,971 5,062,957 223,014
461 TOTAL ACCOUNT548 5,315,480 5,091,299 224,180
462
463 549/MISCELLANEOUS EXPENSES DIO 761,346 731,258 30,088
464 550/RENTS DIO 0 0 0
465
466 TOTAL OTHER POWER OPER EXPENSES 40,121,398 38,432,559 1,688,839
467
468 MAINTENANCE
469 551/SUPERVISION&ENGINEERING L 898 0 0 0
470 552/STRUCTURES DIO 144,697 138,978 5,718
471 553/GENERATING&ELECTRIC PLANT
472 LABOR D10 66,308 63,687 2,620
473 OTHER E10 (91,258) (87,407) (3,850)
474 TOTAL ACCOUNT 553 (24,950) (23,720) (1,230)
475
476554/MISCELLANEOUS EXPENSES L103 5,197,922 4,992,504 205,418
477 TOTAL OTHER POWER MAINT EXPENSES 5,317,669 5,107,762 209,906
478
479 TOTAL OTHER POWER GENERATION EXP 45,439,067 43,540,321 1,898,746
480
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 69 of 202
Results of Operations Model

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
481 OTHER POWER SUPPLY EXPENSE
482 555.0/PURCHASED POWER
483 PURCHASED POWER-TRANS LOSSES E10 1,096,106 1,049,861 46,245
484 DEMAND RESPONSE INCENTIVES CIDA 11,252,265 11,252,265 0
485 OTHER PURCHASED POWER E10 62,606,593 59,965,231 2,641,362
486 TOTAL ACCOUNT 555.0 74,954,964 72,267,357 2,687,606
487 555.1/COGENERATION&SMALL POWER PROD
488 CAPACITY RELATED D10 0 0 0
489 ENERGY RELATED E10 133,853,869 128,206,596 5,647,273
490 TOTAL COGEN&SMALL POWER PROD 133,853,869 128,206,596 5,647,273
491
492 TOTAL ACCOUNT 555 208,808,833 200,473,954 8,334,879
493
494 5561 LOAD CONTROL&DISPATCHING EXPENSES D10 0 0 0
495 5571 OTHER EXPENSES
496 IDAHO POWER COST-RELATED EXPENSES CIDA 11,089,392 11,089,392 0
497 OREGON POWER COST-RELATED EXPENSES CODA 2,742,786 0 2,742,786
498 OTHER D10 1,648,302 1,583,163 65,140
499 TOTAL ACCOUNT 557 15,480,480 12,672,555 2,807,925
500
501 TOTAL OTHER POWER SUPPLY EXPENSES 224,289,313 213,146,508 11,142,804
502
503 TOTAL PRODUCTION EXPENSES 425,372,961 405,886,489 19,486,472
M. Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 70 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
504***TABLE 5-OPERATION 8 MAINTENANCE EXPENSES
505
506 TRANSMISSION EXPENSES
507
508 OPERATION
509 560/SUPERVISION&ENGINEERING L 144 3,092,676 2,970,251 122,425
510 561/LOAD DISPATCHING D12 5,443,124 5,228,016 215,108
511 562/STATION EXPENSES L121 2,767,498 2,657,940 109,558
512 563/OVERHEAD LINE EXPENSES L 127+132+137 1,208,992 1,161,121 47,871
513565/TRANSMISSION OF ELECTRICITY BY OTHERS E10 5,455,955 5,225,769 230,186
514 566/MISCELLANEOUS EXPENSES L 144 0 0 0
515 567/RENTS L144 5,051,708 4,851,734 199,974
516
517 TOTAL TRANSMISSION OPERATION 23,019,953 22,094,832 925,122
518
519 MAINTENANCE
520 568/SUPERVISION&ENGINEERING L 144 317,498 304,929 12,568
521 569/STRUCTURES L116 1,867,774 1,793,949 73,825
522 570/STATION EQUIPMENT L 121 3,236,405 3,108,284 128,121
523 571/OVERHEAD LINES L 127+132+137 1,231,778 1,183,004 48,774
524 573/MISCELLANEOUS PLANT L 143 2,844 2,731 113
525 575/OPER TRANS MKT ADMIN-EIM L 144 703,023 675,194 27,829
526
527 TOTAL TRANSMISSION MAINTENANCE 7,359,321 7,068,092 291,229
528
529 TOTAL TRANSMISSION EXPENSES 30,379,274 29,162,923 1,216,351
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 71 of 202
Results of Operations Model

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
530***TABLE 5-OPERATION&MAINTENANCE EXPENSES
531
532 DISTRIBUTION EXPENSES
533
534 OPERATION
535 580/SUPERVISION&ENGINEERING L163 4,482,117 4,270,839 211,278
536 581/LOAD DISPATCHING D60 5,837,850 5,622,082 215,768
537 582/STATION EXPENSES L151 1,806,860 1,733,284 73,576
538 583/OVERHEAD LINE EXPENSES L153+154 5,648,644 5,247,319 401,325
539 584/UNDERGROUND LINE EXPENSES L 155+156 5,384,313 5,302,359 81,953
540 585/STREET LIGHTING&SIGNAL SYSTEMS L 161 4,838 4,597 241
541586/METER EXPENSES L159 6,597,702 6,395,686 202,016
542587/CUSTOMER INSTALLATIONS EXPENSE L160 1,278,886 1,195,047 83,839
543 588/MISCELLANEOUS EXPENSES L 163 4,438,850 4,229,612 209,238
544 589/RENTS L 163 639,456 609,313 30,143
545 TOTAL DISTRIBUTION OPERATION 36,119,515 34,610,138 1,509,377
546
547 MAINTENANCE
548 590/SUPERVISION&ENGINEERING L 163 7,346 7,000 346
549 591/STRUCTURES L 150 0 0 0
550 592/STATION EQUIPMENT L 151 5,098,858 4,891,231 207,627
551 593/OVERHEAD LINES L 153+154 17,816,440 16,550,616 1,265,824
552 594/UNDERGROUND LINES L 155+156 710,108 699,300 10,808
553595/LINE TRANSFORMERS L157 64,692 61,144 3,548
554 596/STREET LIGHTING&SIGNAL SYSTEMS L 161 182,792 173,695 9,098
555 597/METERS L 159 990,610 960,278 30,332
556 598/MISCELLANEOUS PLANT L 163 151,851 144,693 7,158
557 TOTAL DISTRIBUTION MAINTENANCE 25,022,696 23,487,956 1,534,740
558
559 TOTAL DISTRIBUTION EXPENSES 61,142,211 58,098,094 3,044,117
560
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 72 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
561 CUSTOMER ACCOUNTING EXPENSES
562 901/SUPERVISION L 959 904,933 865,479 39,454
563902/METER READING CW902 2,133,182 1,845,216 287,965
564903/CUSTOMER RECORDS&COLLECTIONS CW903 16,231,266 15,700,347 530,919
565904 UNCOLLECTIBLE ACCOUNTS CW904 3,830,484 3,458,798 371,686
566 905/MISC EXPENSES L 563+564+565 (358) (339) (19)
567 TOTAL CUSTOMER ACCOUNTING EXPENSES 23,099,506 21,869,502 1,230,004
568 CUSTOMER SERVICES&INFORMATION EXPENSES
569 907/SUPERVISION L 966 1,047,982 1,007,227 40,755
570 908/CUSTOMER ASSISTANCE
571 SYSTEM CONSERVATION Eioo 312,791 299,594 13,197
572 OTHER DA908 7,612,007 7,317,018 294,989
573 TOTAL ACCOUNT908 7,924,798 7,616,612 308,186
574 909/INFORMATION&INSTRUCTIONAL DA909 282,865 273,844 9,021
575 910/MISCELLANEOUS EXPENSES L 573+574 792,530 761,901 30,629
576 TOTAL CUST SERV&INFORMATN EXPENSES 10,048,175 9,659,585 388,591
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 73 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
577***TABLE 5-OPERATION&MAINTENANCE EXPENSES
578 SALES EXPENSES
579 912/DEMO&SELLING EXPENSES E10 0 0 0
580 TOTAL ACCOUNT 924 0 0 0
581
582 ADMINISTRATIVE&GENERAL EXPENSES
583 920/ADMINISTRATIVE&GENERAL SALARIES LABOR 84,758,151 81,135,647 3,622,504
584 921/OFFICE SUPPLIES LABOR 16,354,216 15,655,248 698,968
585 922/ADMIN&GENERAL EXPENSES TRANSFERRED-CR LABOR (42,660,535) (40,837,254) (1,823,282)
586 923/OUTSIDE SERVICES LABOR 10,180,054 9,744,966 435,088
587 924/PROPERTY INSURANCE
588 PRODUCTION-STEAM D10 I 465,139 ■ 446,757 18,382
589 ALL RISK&MISCELLANEOUS P110P 2,869,237 2,753,509 115,728
590 TOTAL ACCOUNT 924 3,334,375 3,200,265 134,110
591
592925/INJURIES&DAMAGES LABOR 4,153,637 3,976,113 177,524
593 926/EMPLOYEE PENSIONS&BENEFITS LABOR 43,540,293 41,679,411 1,860,882
594 EMPLOYEE PENSIONS&BENEFITS-OREGON CODA 514,677 0 514,677
595 EMPLOYEE PENSIONS&BENEFITS-IDAHO CIDA 17,153,713 17,153,713 0
596 EMPLOYEE PENSIONS&BENEFITS-FERC D11 0 0 0
597 927/FRANCHISE REQUIREMENTS CIDA 0 0 0
598 928/REGULATORY COMMISSION EXPENSES
599 FERC ADMIN ASSESS&SECURITIES
600 CAPACITY RELATED D10 3,043,871 2,923,580 120,291
601 ENERGY RELATED E10 1,044,908 1,000,824 44,084
602 FERC RATE CASE D11 0 0 0
603 FERC ORDER472 E99 1,108,266 1,061,278 46,988
604 FERC OTHER D11 283,013 271,828 11,184
605 FERC-OREGONHYDRO FEE D11 271,717 260,979 10,738
606 SEC EXPENSES L 179 0 0 0
607 IDAHO PUC-RATE CASE CIDA 0 0 0
608 -OTHER CIDA 48,457 48,457 0
609 OREGON PUC-RATE CASE CODA 0 0 0
610 -OTHER CODA 329,733 0 329,733
611 TOTAL ACCOUNT 928 6,129,965 5,566,945 563,019
612
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 74 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
613 929/DUPLICATE CHARGES LABOR 0 0 0
614 930.1/GENERAL ADVERTISING LABOR 0 0 0
615 930.2/MISCELLANEOUS EXPENSES LABOR 3,994,389 3,823,672 170,717
616 931/RENTS L 177 0 0 0
617 TOTAL ADM&GEN OPERATION 147,452,935 141,098,727 6,354,208
618
619935/GENERAL PLANT MAINTENANCE L177 8,021,415 7,679,349 342,066
620 TOTAL ADMIN&GENERAL EXPENSES 155,474,350 148,778,075 6,696,275
621
622 416/MERCHANDISING EXPENSE 5,870,784 5,653,799 216,985
623 TOTAL OPER&MAINT EXPENSES 711,387,262 679,108,466 32,278,796
624
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 75 of 202
Results of Operations Model

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
3 DESCRIPTION SOURCE SYSTEM IPUC OPUC
625"'"TABLE 6-DEPRECIATION&AMORTIZATION EXPENSE'
626
627 DEPRECIATION EXPENSE
628 310-316/STEAM PRODUCTION L 100 9,349,110 8,979,640 369,470
629 330-336/HYDRAULIC PRODUCTION L 101 26,427,920 25,383,509 1,044,411
630 340-346/OTHER PRODUCTION-LANGLEY L 102 12,369,381 11,880,552 488,828
631 340-346/OTHER PRODUCTION-DANSKIN/BENNETT MTN L 103 6,402,222 6,149,211 253,011
632 TOTAL PRODUCTION PLANT 54,548,632 52,392,912 2,155,719
633
634 TRANSMISSION PLANT
635 350/LAND&LAND RIGHTS L 111 417,228 400,739 16,489
636 352/STRUCTURES&IMPROVEMENTS L116 2,006,107 1,926,815 79,292
637 353/STATION EQUIPMENT L 121 10,453,388 10,039,566 413,822
638 354/TOWERS&FIXTURES L 127 2,790,758 2,680,469 110,289
639 355/POLES&FIXTURES L 132 6,220,865 5,974,164 246,701
640356/OVERHEAD CONDUCTORS&DEVICES L137 4,009,003 3,850,208 158,794
641 359/ROADS&TRAILS L 142 2,693 2,587 106
642 TOTAL TRANSMISSION PLANT 25,900,042 24,874,549 1,025,493
643
644 DISTRIBUTION PLANT
645 360/LAND&LAND RIGHTS L 149 29,091 27,857 1,234
646 361/STRUCTURES&IMPROVEMENTS L 150 1,393,980 1,333,281 60,699
647 362/STATION EQUIPMENT L 151 6,404,841 6,144,034 260,807
648 363/BATTERY STORAGE L 152 5,452,384 5,236,910 215,474
649364/POLES,TOWERS&FIXTURES L153 6,291,112 5,798,250 492,863
650 365/OVERHEAD CONDUCTORS&DEVICES L154 3,582,834 3,382,092 200,742
651366/UNDERGROUND CONDUIT L155 1,296,430 1,275,607 20,823
652 367/UNDERGROUND CONDUCTORS&DEVICES L 156 7,792,088 7,674,565 117,523
653 368/LINE TRANSFORMERS L 157 14,514,821 13,718,855 795,966
654 369/SERVICES L 156 1,185,537 1,136,712 48,825
655 370/METERS L 159 5,858,396 5,679,017 179,379
656 3711 INSTALLATIONS ON CUSTOMER PREMISES L 160 240,112 224,371 15,741
657 373 1 STREET LIGHTING SYSTEMS L161 232,489 220,918 11,571
658 TOTAL DISTRIBUTION PLANT 54,274,115 51,852,469 2,421,646
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 76 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
659**"TABLE 6-DEPRECIATION&AMORTIZATION EXPENSE'*'
660
661 GENERALPLANT
662 389/LAND&LAND RIGHTS L 166 0 0 0
663 390/STRUCTURES&IMPROVEMENTS L167 3,604,684 3,450,966 153,719
664 391/OFFICE FURNITURE&EQUIPMENT L 168 6,643,508 6,360,202 283,307
665 392/TRANSPORTATION EQUIPMENT L 169 72,444 69,355 3,089
666 393/STORES EQUIPMENT L 170 230,703 220,865 9,838
667 394/TOOLS,SHOP&GARAGE EQUIPMENT L 171 811,782 777,165 34,618
668 395/LABORATORY EQUIPMENT L 172 850,707 814,430 36,278
669 396/POWER OPERATED EQUIPMENT L 173 0 0 0
670 397/COMMUNICATIONS EQUIPMENT L174 5,531,019 5,295,154 235,866
671 398/MISCELLANEOUS EQUIPMENT L175 774,657 741,623 33,035
672 TOTAL GENERAL PLANT 18,519,507 17,729,758 789,749
673
674 403/BOARDMAN ARO DEPRECIATION EXP DAARO 0 0 0
675 DEPR EXP BEFORE DISALLOWED COSTS 153,242,295 146,849,688 6,392,607
676
677 DEPRECIATION ON DISALLOWED COSTS L 675 (296,299) (283,939) (12,360)
678 TOTAL DEPRECIATION EXPENSE 152,945,996 146,565,749 6,380,247
679
680 AMORTIZATION EXPENSE
681 INTANGIBLE PLANT L97 6,669,074 6,394,841 274,233
682 HYDRAULIC PRODUCTION L 101 0 0 0
683 ADJUSTMENTS,GAINS&LOSSES L 97 15,018 14,424 593
684 TOTAL AMORTIZATION EXPENSE 6,684,092 6,409,265 274,827
685
686 TOTAL DEPRECIATION&AMORTIZATION EXP 159,630,088 152,975,014 6,655,074
687
688 411.093/4/ARO ACCRETION EXPENSE DAACCRETION 12,995 12,485 509
689
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 77 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/3112023
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
690"**TABLE 7-TAXES OTHER THAN INCOME TAXES*'"
691
692 TAXES OTHER THAN INCOME
693 FEDERALTAXES
694 FICA LABOR 0 0 0
695 FUTA LABOR 0 0 0
696 LESS PAYROLL DEDUCTION LABOR 0 0 0
697
698 STATE TAXES
699 AD VALOREM TAXES
700 JIM BRIDGER STATION L100 1,310,444 1,258,656 51,788
701 VALMY L 100 279,802 268,744 11,058
702 BOARDMAN L 100 0 0 0
703 OTHER-PRODUCTION PLANT L105 5,023,123 4,824,613 198,510
704 OTHER-TRANSMISSION PLANT L 143 5,094,471 4,892,805 201,667
705 OTHER-DISTRIBUTION PLANT L 163 6,775,452 6,456,071 319,381
706 OTHER-GENERAL PLANT L177 1,071,005 1,025,333 45,672
707 SUB-TOTAL 19,554,298 18,726,223 828,075
708
709 LICENSES-HYDRO PROJECTS L 101 4,376 4,203 173
710
711 REGULATORY COMMISSION FEES
712 STATE OF IDAHO CODA 2,837,473 2,837,473 0
713 STATE OF OREGON CODA 260,575 0 260,575
714
715 FRANCHISE TAXES
716 STATE OF OREGON CODA 944,305 0 944,305
717
718 OTHER STATE TAXES
719 UNEMPLOYMENTTAXES LABOR 0 0 0
720 HYDRO GENERATION KWH TAX E10 1,659,564 1,589,547 70,017
721 IRRIGATION-PIC E10 293,571 281,185 12,386
722
723 CANADA GST TAXES E10 0 0 0
724
725 TOTAL TAXES OTHER THAN INCOME 25,554,161 23,438,631 2,115,530
726
727
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 78 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
728"*"TABLE 8-REGULATORY DEBITS/CREDITS
729 REGULATORY DEBITS/CREDITS
730 STATE OF IDAHO CIDA 1,528,445 1,528,445 0
731 STATE OF OREGON CODA 317,709 0 317,709
732
733 TOTAL REGULATORY DEBITS/CREDITS 1,846,154 1,528,445 317,709
734
735
736"*"TABLE 9-INCOME TAXES*"
737
738 410/411 NET PROVISION FOR DEFERRED INCOME TAXES
739 ACCOUNT#282-RELATED P101P (15,940,296) (15,260,535) (679,760)
740 ACCOUNTS#1908#283-RELATED L769 (2,657,192) (2,506,928) (150,263)
741 TOTAL NET PROVISION FOR DEFERRED INCOME TAXES (18,597,487) (17,767,464) (830,024)
742
743411.4-INVESTMENT TAX CREDIT ADJUSTMENT PIOIP 50,193,136 48,052,692 2,140,444
744
745 SUMMARY OF INCOME TAXES
746
747 TOTAL FEDERAL INCOME TAX L786 (22,852,451) (21,350,498) (1,501,953)
748
749 STATE INCOME TAX
750 STATE OF IDAHO L852 (7,902,294) (7,650,726) (251,568)
751 STATE OF OREGON L 827 557,793 517,477 40,316
752 OTHER STATES L868 (77,434) (80,785) 3,352
753 TOTAL STATE INCOME TAXES (7,421,934) (7,214,035) (207,900)
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 79 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
754"*"TABLE 10-CALCULATION OF FEDERAL INCOME TAX
755
756 OPERATING REVENUES 1,191,500,290 1,133,559,689 57,940,601
757
758 OPERATING EXPENSES
759 OPERATION&MAINTENANCE 711,387,262 679,108,466 32,278,796
760 DEPRECIATION EXPENSE 152,945,996 146,565,749 6,380,247
761 AMORTIZATION OF LIMITED TERM PLANT 6,684,092 6,409,265 274,827
762 ACCRETION EXPENSE 12,995 12,485 509
763 TAXES OTHER THAN INCOME 25,554,161 23,438,631 2,115,530
764 REGULATORY DEBITS/CREDITS 1,846,154 1,528,445 317,709
765 TOTAL OPERATING EXPENSES 898,430,660 857,063,042 41,367,617
766
767 BOOK-TAX ADJUSTMENT L 765 0 0 0
768
769 INCOME BEFORE TAX ADJUSTMENTS 293,069,631 276,496,647 16,572,984
770
771 INCOME STATEMENT ADJUSTMENTS
772 LONG TERM DEBT INTEREST EXPENSE L24 137,657,281 131,620,086 6,037,196
773 OTHER INTEREST EXPENSE L24 19,913,023 19,039,704 873,320
774 TOTAL INTEREST CHARGES 157,570,305 150,659,789 6,910,515
775
776 NET OPERATING INCOME BEFORE STATE INCOME TAXES 135,499,326 125,836,857 9,662,469
777
778 TOTAL STATE INCOME TAXES(ALLOWED) (3,537,443) (3,639,074) 101,631
779
780 NET FEDERAL INCOME AFTER STATE INCOME TAXES 139,036,769 129,475,931 9,560,838
781
782 FEDERAL TAX AT21 PERCENT 29,197,722 27,189,946 2,007,776
783 OTHER CURRENT TAX ADJUSTMENTS L782 (42,231,900) (39,327,831) (2,904,069)
784 PRIOR YEARS'TAX ADJUSTMENT L782 (9,810,034) (9,135,448) (674,585)
785
786 TOTAL FEDERAL INCOME TAX BEFORE OTHER ADJUSTMENTS (22,844,212) (21,273,334) (1,570,878)
787
788 OTHER TAX ADJUSTMENTS
789 ALLOWANCE FOR AFUDC P1o1P 0 0 0
790 FEDERAL INCOME TAX ADJUSTMENTS-PLANT P101P (23,762,778) (22,749,434) (1,013,344)
791 FEDERAL INCOME TAX ADJUSTMENTS-OTHER L769 23,723,545 22,381,987 1,341,558
792 SUM OF OTHER ADJUSTMENTS (39,233) (367,447) 328,215
793 FEDERAL TAX ON OTHER TAX ADJ AT 21 PERCENT (8,239) (77,164) 68,925
794 FEDERAL GENERAL BUSINESS CREDITS P1o1P 0 0 0
795
796 TOTAL FEDERAL INCOME TAX (22,852,451) (21,350,498) (1,501,953)
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 80 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/3112023
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
797"*"TABLE 11-OREGON STATE INCOME TAXES
798
799 NET OPERATING INCOME BEFORE TAXES-OREGON L776 135,499,326 125,836,857 9,662,469
800
801 ALLOWANCE FOR AFUDC P101P 0 0 0
802
803 STATE INCOME TAX ADJUSTMENTS-PLANT P101P (23,762,778) (22,749,434) (1,013,344)
804 STATE INCOME TAX ADJUSTMENTS-OTHER L769 23,723,545 22,381,987 1,341,558
805 TOTAL STATE INCOME TAX ADJUSTMENTS (39,233) (367,447) 328,215
806 ADD: MFG DEDUCTION NOT ALLOWED L 769 0 0 0
807
808 TOTAL STATE INCOME TAX ADJUSTMENTS-OREGON (39,233) (367,447) 328,215
809
810 INCOME SUBJECT TO OREGON TAX 135,460,093 125,469,410 9,990,683
811
812 IERCO TAXABLE INCOME E10 13,361,504 12,797,784 563,720
813 BONUS DEPRECIATION ADJUSTMENT P101P (6,823,240) (6,532,269) (290,971)
814 FEDERAL NOL L 750 0 0 0
815 TOTAL STATE TAXABLE INCOME-OREGON 141,998,357 131,734,926 10,263,432
816 APPORTIONMENT FACTOR(0.045454550) 6,454,471 5,987,952 466,520
817 POST APPORTIONMENT M ITEMS L 757 0 0 0
818 TOTAL TAXABLE INCOME-OREGON 6,454,471 5,987,952 466,520
819
820 OREGON TAX AT 6.6 PERCENT 425,995 395,205 30,790
821 LESS:INVESTMENT TAX CREDIT P101P 0 0 0
822
823 STATE INCOME TAX ALLOWED-OREGON 425,995 395,205 30,790
824 ADD: FIN 48 ADJUSTMENT L819 282,224 261,825 20,399
825 PRIOR YEARS'TAX ADJUSTMENT L820 (150,426) (139,554) (10,873)
826
827 STATE INCOME TAX PAID-OREGON 557,793 517,477 40,316
828
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 81 of 202
Results of Operations Model

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/3112023
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
829"'"TABLE 12-IDAHO STATE INCOME TAXES*"
830
831 NET OPERATING INCOME BEFORE TAXES-IDAHO L776 135,499,326 125,836,857 9,662,469
832
833 ALLOWANCE FOR AFUDC P101P 0 0 0
834
835 STATE INCOME TAX ADJUSTMENTS-PLANT P101P (23,762,778) (22,749,434) (1,013,344)
836 STATE INCOME TAX ADJUSTMENTS-OTHER L769 23,723,545 22,381,987 1,341,558
837 STATE INCOME TAX ADJUSTMENTS (39,233) (367,447) 328,215
838
839 INCOME SUBJECT TO IDAHO TAX 135,460,093 125,469,410 9,990,683
840
841 IERCO TAXABLE INCOME E10 13,361,504 12,797,784 563,720
842 BONUS DEPRECIATION ADJUSTMENT P101P (42,661,135) (40,841,887) (1,819,248)
843 FEDERAL NOL L 750 0 0 0
844 TOTAL STATE TAXABLE INCOME-IDAHO 106,160,462 97,425,307 8,735,155
845
846 IDAHO TAX AT 5.6 PERCENT 5,944,986 5,455,817 489,169
847 LESS:INVESTMENT TAX CREDIT P101P 10,057,246 9,628,363 428,883
848
849 STATE INCOME TAX ALLOWED-IDAHO (4,112,260) (4,172,546) 60,286
850 ADD: FIN 48 ADJUSTMENT L 845 0 0 0
851 PRIOR YEARS'TAX ADJUSTMENT L846 (3,790,034) (3,478,180) (311,854)
852 STATE INCOME TAX PAID-IDAHO (7,902,294) (7,650,726) (251,568)
853
854
855 OTHER STATE INCOME TAX
856 INCOME SUBJECT TO TAX 135,460,093 125,469,410 9,990,683
857
858 IERCO TAXABLE INCOME E10 13,361,504 12,797,784 563,720
859 BONUS DEPRECIATION ADJUSTMENT P101P 0 0 0
860 FEDERAL NOL L 750 0 0 0
861 TOTAL TAXABLE INCOME BEFORE APPORTIONMENT-OTHER STATES 148,821,597 138,267,194 10,554,403
862 POST APPORTIONMENT M ITEMS L 757 0 0 0
863 TOTAL TAXABLE INCOME-OTHER STATES 148,821,597 138,267,194 10,554,403
864
865 OTHER TAX AT0.1 PERCENT 148,822 138,267 10,554
866 ADD: FIN 48 ADJUSTMENT L 852 0 0 0
867 PRIOR YEARS'TAX ADJUSTMENT L852 (226,255) (219,053) (7,203)
868 OTHER STATES'INCOMETAX PAID (77,434) (80,785) 3,352
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 82 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
869***TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
870 STEAM POWER GENERATION
871 500-513/TOTAL STEAM GENERATION Dio 442,341 424,860 17,481
872 HYDRAULIC POWER GENERATION
873 535/SUPERVISION&ENGINEERING L879 4,198,454 4,031,774 166,680
874536/WATER FOR POWER E10 870,626 833,895 36,732
875537/HYDRAULIC EXPENSES D10 6,581,987 6,321,872 260,115
876 538/ELECTRIC EXPENSES D10 1,659,356 1,593,780 65,576
877 539/MISCELLANEOUS EXPENSES Dio 3,733,853 3,586,294 147,559
878540/RENTS Dio 0 0 0
879 TOTAL HYDRAULIC OPERATION EXPENSES 17,044,277 16,367,615 676,662
880 541/SUPERVISION&ENGINEERING L 885 167,910 161,275 6,636
881 542/STRUCTURES Dio 567,222 544,806 22,416
882 543/RESERVOIRS,DAMS&WATERWAYS D10 301,175 289,273 11,902
883544/ELECTRIC PLANT Dio 1,724,170 1,656,032 68,138
884 545/MISCELLANEOUS HYDRAULIC PLANT Dio 2,266,086 2,176,532 89,554
885 TOTAL HYDRAULIC MAINTENANCE EXPENSES 5,026,564 4,827,918 198,646
886 TOTAL HYDRAULIC GENERATION EXPENSES 22,070,840 21,195,533 875,307
887 OTHER POWER GENERATION
888 546/SUPERVISION&ENGINEERING L 892 582,577 559,554 23,023
889 548/GENERATING EXPENSES Dio 0 0 0
890549/MISCELLANEOUS EXPENSES Dio 3,495,474 3,357,336 138,138
891550/RENTS Dio 496,069 476,464 19,604
892 TOTAL OTHER POWER OPER EXPENSES 4,574,120 4,393,354 180,766
893
894 551/SUPERVISION&ENGINEERING L 898 0 0 0
895 552/STRUCTURES D70 47,812 45,922 1,889
896553/GENERATING&ELECTRIC PLANT Dio 65,753 63,154 2,598
897 554/MISCELLANEOUS EXPENSES Dio 523,281 502,601 20,680
898 TOTAL OTHER POWER MAINT EXPENSES 636,845 611,678 25,168
899 TOTAL OTHER POWER GENERATION EXP 5,210,965 5,005,032 205,933
900 555/PURCHASE POWER E10 0 0 0
901 556/LOAD CONTROL&DISPATCHING EXPENSES D10 0 0 0
902 Dio 4,863,381 4,671,184 192,197
903 TOTAL OTHER POWER SUPPLY EXPENSES 4,863,381 4,671,184 192,197
904
905 TOTAL PRODUCTION EXPENSES 32,587,528 31,296,609 1,290,919
906
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 83 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
907***TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
908
909 TRANSMISSION EXPENSES
910 560/SUPERVISION&ENGINEERING L 144 2,317,807 2,226,056 91,751
911 561/LOAD DISPATCHING D12 3,373,689 3,240,363 133,326
912 562/STATION EXPENSES L121 1,900,727 1,825,482 75,245
913 563/OVERHEAD LINE EXPENSES L127+132+137 483,392 464,252 19,140
914565/TRANSMISSION OF ELECTRICITY BY OTHERS E10 0 0 0
915 566/MISCELLANEOUS EXPENSES L 529 0 0 0
916 567/RENTS L 144 0 0 0
917 TOTAL TRANSMISSION OPERATION 8,075,615 7,756,153 319,462
918 568/SUPERVISION&ENGINEERING L 144 139,203 133,693 5,510
919 569/STRUCTURES L 116 1,426,838 1,370,441 56,396
920 570/STATION EQUIPMENT L 121 2,616,011 2,512,450 103,561
921 571/OVERHEAD LINES L 127+132+137 972,477 933,971 38,506
922 575/OPER TRANS MKT ADMIN-EIM L144 1,155 1,109 46
923 TOTAL TRANSMISSION MAINTENANCE 5,155,684 4,951,664 204,020
924 TOTAL TRANSMISSION EXPENSES 13,231,299 12,707,817 523,482
925
926 DISTRIBUTION EXPENESES
927 580/SUPERVISION&ENGINEERING L 163 3,237,656 3,085,039 152,617
928 581/LOAD DISPATCHING D60 4,740,713 4,565,495 175,218
929 582/STATION EXPENSES L151 1,048,893 1,006,182 42,711
930 583/OVERHEAD LINE EXPENSES L153+154 3,701,154 3,438,194 262,960
931584/UNDERGROUND LINE EXPENSES L155+156 1,636,360 1,611,453 24,907
932 585/STREET LIGHTING&SIGNAL SYSTEMS L 161 1,916 1,821 95
933586/METER EXPENSES L159 4,739,824 4,594,694 145,129
934 587/CUSTOMER INSTALLATIONS EXPENSE L 160 857,913 801,672 56,242
935588/MISCELLANEOUS EXPENSES L559 2,979,865 2,831,505 148,360
936 589/RENTS L 163 0 0 0
937 TOTAL DISTRIBUTION OPERATION 22,944,293 21,936,055 1,008,238
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 84 of 202
Results of Operations Model

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
3 DESCRIPTION SOURCE SYSTEM IPUC OPUC
938"'"TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
939
940
941 590/SUPERVISION&ENGINEERING L 163 7,755 7,390 366
942 591/STRUCTURES L 150 0 0 0
943 592/STATION EQUIPMENT L 151 3,271,354 3,138,143 133,210
9"593/OVERHEAD LINES L 153+154 5,418,492 5,033,519 384,973
945 594/UNDERGROUND LINES L 155+156 311,063 306,328 4,735
946595/LINE TRANSFORMERS L157 24,796 23,436 1,360
947 596/STREET LIGHTING&SIGNAL SYSTEMS L 161 93,462 88,810 4,652
948 597/METERS L 159 769,699 746,131 23,568
949 598/MISCELLANEOUS PLANT L 163 105,914 100,921 4,993
950 TOTAL DISTRIBUTION MAINTENANCE 10,002,534 9,444,679 557,855
951 TOTAL DISTRIBUTION EXPENSES 32,946,827 31,380,734 1,566,094
952
953 CUSTOMER ACCOUNTING EXPENSES
954 901/SUPERVISION L 959 794,380 759,746 34,634
955 9021 METER READING Cw902 1,260,207 1,090,088 170,120
956 903/CUSTOMER RECORDS&COLLECTIONS CW903 10,577,395 10,231,412 345,983
957904/UNCOLLECTIBLE ACCOUNTS CW904 0 0 0
958 905/MISC EXPENSES L 955-957 0 0 0
959 TOTAL CUSTOMER ACCOUNTING EXPENSES 12,631,982 12,081,246 550,736
960
961 CUSTOMER SERVICES&INFORMATION EXPENSES
962 907/SUPERVISION L 965 836,042 803,529 32,513
963 908/CUSTOMER ASSISTANCE L 573 5,242,141 5,038,281 203,860
964 909/INFORMATION&INSTRUCTIONAL L 574 0 0 0
965 910/MISCELLANEOUS EXPENSES L 963+964 384,926 369,957 14,969
966 TOTAL CUST SERV&INFORMATN EXPENSES 6,463,109 6,211,766 251,342
967
968 SALES EXPENSES
969 912/DEMO&SELLING EXPENSES L 579 0 0 0
970 TOTAL SALES EXPENSES 0 0 0
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 85 of 202
Results of Operations Model

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
971 ***TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
972
973 ADMINISTRATIVE&GENERAL EXPENSES
974 920/ADMINISTRATIVE&GENERAL SALARIES PTDCAS 58,534,056 56,032,308 2,501,748
975 921/OFFICE SUPPLIES PTDCAS 403,723 386,468 17,255
976 922/ADMIN&GENERAL EXPENSES TRANSFERRED-CR SUBEX 0 0 0
977 923/OUTSIDE SERVICES PTDCAS 0 0 0
978 924/PROPERTY INSURANCE
979 PRODUCTION-STEAM L 100 0 0 0
980 ALL RISK&MISCELLANEOUS P110P 426,708 409,497 17,211
981 TOTAL ACCOUNT 924
982
983 925/INJURIES&DAMAGES LABOR 146,518 140,256 6,262
984 926/EMPLOYEE PENSIONS&BENEFITS LABOR 0 0 0
985 927/FRANCHISE REQUIREMENTS CIDA 0 0 0
986 928/REGULATORY COMMISSION EXPENSES
987 FERC ADMIN ASSESSMENTS L 179 0 0 0
988 FERC RATE CASE EXPENSE RESREV 0 0 0
989 SEC EXPENSES L 179 0 0 0
990 IDAHO PUC-RATE CASE CIDA 0 0 0
991 -OTHER CIDA 0 0 0
992 OREGON PUC-RATE CASE CODA 0 0 0
993 -OTHER CODA 0 0 0
994 TOTAL ACCOUNT 928
995
996 929/DUPLICATE CHARGES SUBEX 0 0 0
997 930.1/GENERAL ADVERTISING RELAB 0 0 0
998 930.2/MISCELLANEOUS EXPENSES PTDCAS 198,088 189,622 8,466
999 931/RENTS L 177 0 0 0
1000 935/GENERAL PLANT MAINTENANCE P3908 1,228,809 1,176,407 52,401
1001 TOTAL ADMIN&GENERAL EXPENSES 60,937,902 58,334,557 2,603,344
1002 TOTAL OPER&MAINT EXPENSES 158,798,646 152,012,729 6,785,917
1003
1004 TOTAL LABOR-RATIO(%) 1 0.9573 0.0427
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 86 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/3112023
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1005-TABLE"TABLE 14-ALLOCATION FACTORS
1006
1007 CAPACITY RELATED KW
1008 PRODUCTION RELATED COINCIDENT PEAKS @ GENERATION LEVE DIO 2,563,697.3 _ 2,462,382.0 101,315.3
1009 SYSTEM TRANSMISSION SERVICE @ GENERATION LEVEL D11 2,563,697.3 2,462,382.0 101,315.3
1010 RETAIL TRANSMISSION D12 2,563,697.3 2,462,382.0 101,315.3
1011 DISTRIBUTION SERVICE @ GENERATION LEVEL D60 2,424,087.8 -2,334,493.0_ 89,594.8
1012
1013 ENERGY RELATED MWH
1014 GENERATION LEVEL(PSP) E10 16,435,689.0 P11115,742,270.0 693,419.0
1015 RETAIL MWH AT GENERATION LVL E100 16,435,689.0 15,742,270.0 693,419.0
1016 CUSTOMER LEVEL E99 15,410,622.3 14,757,250.1 653,372.1
1017
1018 CUSTOMER RELATED FACTORS
1019 369-DIRECT ASSIGNMENT DA369 70,650,589 67,740,904 2,909,686
1020 370-METER INVESTMENT ACCT370 115,905,804 112,356,866 3,548,937
1021 902-CUSTOMER WEIGHTED CW902 2,122,543 1,836,014 286,529
1022 903-CUSTOMER WEIGHTED CW903 16,141,973 15,613,975 527,998
1023 904-CUSTOMER WEIGHTED CW904 3,786,792 3,419,345 367,446
1024 909-DIRECT ASSIGN-AVG.NO.CUST. DA909 624,419 604,506 19,913
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 87 of 202
Results of Operations Model

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1025-TABLE*TABLE 14-ALLOCATION FACTORS
1026
1027 DIRECT ASSIGNMENTS
1028 252-CUSTOMER ADVANCES DA252 32,170,424 32,110,363 60,062
1029 350-LAND&LAND RIGHTS DA350 0 0 0
1030 352-STRUCTURES&IMPROVEMENTS DA352 658 0 658
1031 353-STATION EQUIPMENT DA353 111,594 75,100 36,494
1032 354-TOWERS&FIXTURES DA354 0 0 0
1033 355-POLES&FIXTURES DA355 33,842 0 33,842
1034 356-OVERHEAD CONDUCTORS&DEVICES DA356 26,495 1,189 25,306
1035 359-ROADS&TRAILS DA359 0 0 0
1036 360-LAND&LAND RIGHTS ACCT360 9,024,558 8,641,897 382,661
1037 361-STRUCTURES&IMPROVEMENTS ACCT361 62,286,419 59,574,241 2,712,178
1038 362-STATION EQUIPMENT ACCT362 333,778,528 320,186,976 13,591,552
1039 364-POLES,TOWERS&FIXTURES DA364 333,422,399 307,301,185 26,121,215
1040 365-OVERHEAD CONDUCTORS&DEVICES DA365 161,939,763 152,866,451 9,073,313
1041 366-UNDERGROUND CONDUIT DA366 55,753,674 54,858,172 895,502
1042 367-UNDERGROUND CONDUCTORS&DEVICES DA367 338,826,990 333,716,692 5,110,297
1043 368-LINE TRANSFORMERS ACCT368 750,275,508 709,131,796 41,143,712
1044 371-INSTALLATIONS ON CUSTOMER PREMISES DA371 5,271,974 4,926,363 345,611
1045 373-STREET LIGHTING SYSTEMS DA373 6,798,038 6,459,698 338,340
1046 451-REVENUE-MISCELLANEOUS SERVICE DA451 5,103,805 5,043,528 60,277
1047 454-REVENUE-FACILITIES CHARGE DA454 10,841,971 10,407,743 434,228
1048 908-OTHER CUSTOMER ASSISTANCE DA908 7,567,753 7,274,479 293,274
1049 440-RETAIL SALES REVENUE RETREV 1,082,229,582 1,028,294,859 53,934,723
1050 447-WHOLESALE SALES REVENUE RESREV 0 0 0
1051 RIDER FUND DIRECT ASSIGNMENT DARIDER 0 0 0
1052 411-BOARDMAN ARO ACCRETION EXP DAACCRETION 12,995 12,485 509
1053 403-BOARDMAN ARO DEPRECIATION EXP DAARO 0 0 0
1054 IDAHO CIDA 1 1 0
1055 OREGON CODA 1 0 1
1056 NET TO GROSS TAX MULTIPLIER DA990 1.347 1.347 1.347
M. Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 88 of 202
Results of Operations Model

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1057***TABLE 14-ALLOCATION FACTORS
1058
1059 INTERNALLY DEVELOPED ALLOCATION FACTORS
1060 PLANT-PROD,TRANS&DIST PTD 5,626,985,510 5,387,027,475 239,958,034
1061 LAB-PROD,TRANS,DIST,CUSTACCT&CSIS PTDCAS 97,860,745 93,678,172 4,182,573
1062 PLANT-HYDRO,OTHER,TSUBS,DSUBS&GP P110P 2,774,311,882 2,662,412,409 111,899,473
1063 PLANT-GEN PLT(390,391,397&398) P3908 294,608,041 282,044,731 12,563,311
1064 PLANT-PROD,TRANS,DIST&GEN P101P 6,131,495,853 5,870,023,402 261,472,451
1065 O&M-PROD,TRANS,DIST,CUSTACCT&CSIS SUBEX 550,042,128 524,676,592 25,365,536
1066 LAB-PROD,TRANS,DIST,CUSTACCT&CSIS RELAB 97,860,745 93,678,172 4,182,573
1067 LAB-ALL LABOR WITHOUT925-6"CIRC' LABOR 158,225,421 151,462,977 6,762,444
1068 REV-RETAIL,RESALE&WHEELING FMREV 1,111,896,775 1,056,985,248 54,911,527
1069 O&M-ALL EXCEPT FUEL O&MM 563,804,789 537,737,264 26,067,525
1070 PLANT-89%*HYD PROD+11%*TRANS SURVEY 1,128,416,503 1,083,812,519 44,603,984
1071 O&M-TOTAL(NOT USED) OM401 711,387,262 679,108,466 32,278,796
M. Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 89 of 202
Results of Operations Model

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1072-TABLE*TABLE 15-ALLOCATION FACTORS-RATIOS***
1073
1074 CAPACITY RELATED KW
1075 PRODUCTION RELATED COINCIDENT PEAKS @ GENERATION LEVE D10 100.00% 96.05% 3.95%
1076 SYSTEM TRANSMISSION SERVICE @ GENERATION LEVEL D11 100.00% 96.05% 3.95%
1077 RETAIL TRANSMISSION D12 100.00% 96.05% 3.95%
1078 DISTRIBUTION SERVICE @ GENERATION LEVEL D60 100.00% 96.30% 3.70%
1079
1080 ENERGY RELATED MWH
1081 GENERATION LEVEL(PSP) E10 100.00% 95.78% 4.22%
1082 RETAIL MWH AT GENERATION LVL E100 100.00% 95.78% 4.22%
1083 CUSTOMER LEVEL E99 100.00% 95.76% 4.24%
1084
1085 CUSTOMER RELATED FACTORS
1086 369-DIRECT ASSIGNMENT DA369 100.00% 95.88% 4.12%
1087 370-METER INVESTMENT ACCT370 100.00% 96.94% 3.06%
1088 902-CUSTOMER WEIGHTED CW902 100.00% 86.50% 13.50%
1089 903-CUSTOMER WEIGHTED CW903 100.00% 96.73% 3.27%
1090 904-CUSTOMER WEIGHTED CW904 100.00% 90.30% 9.70%
1091 909-DIRECT ASSIGN-AVG.NO.CUST. DA909 100.00% 96.81% 3.19%
M. Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 90 of 202
Results of Operations Model

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
3 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1092-TABLE*TABLE 15-ALLOCATION FACTORS-RATIOS***
1093
1094 DIRECT ASSIGNMENTS
1095 252-CUSTOMER ADVANCES DA252 100.00% 99.81% 0.19%
1096 350-LAND&LAND RIGHTS DA350 #DIV/01 #DIV/01 #DIV/01
1097 352-STRUCTURES&IMPROVEMENTS DA352 100.00% 0.00% 100.00%
1098 353-STATION EQUIPMENT DA353 100.00% 67.30% 32.70%
1099 354-TOWERS&FIXTURES DA354 #DIV/01 #DIV/01 #DIV/01
1100 355-POLES&FIXTURES DA355 100.00% 0.00% 100.00%
1101 356-OVERHEAD CONDUCTORS&DEVICES DA356 100.00% 4.49% 95.51%
1102 359-ROADS&TRAILS DA359 #DIV/01 #DIV/01 #DIV/01
1103 360-LAND&LAND RIGHTS ACCT360 100.00% 95.76% 4.24%
1104 361-STRUCTURES&IMPROVEMENTS ACCT361 100.00% 95.65% 4.35%
1105 362-STATION EQUIPMENT ACCT362 100.00% 95.93% 4.07%
1106 364-POLES,TOWERS&FIXTURES DA364 100.00% 92.17% 7.83%
1107 365-OVERHEAD CONDUCTORS&DEVICES DA365 100.00% 94.40% 5.60%
1108 366-UNDERGROUND CONDUIT DA366 100.00% 98.39% 1.61%
1109 367-UNDERGROUND CONDUCTORS&DEVICES DA367 100.00% 98.49% 1.51%
1110 368-LINE TRANSFORMERS ACCT368 100.00% 94.52% 5.48%
1111 371-INSTALLATIONS ON CUSTOMER PREMISES DA371 100.00% 93.44% 6.56%
1112 373-STREET LIGHTING SYSTEMS DA373 100.00% 95.02% 4.98%
1113 451-REVENUE-MISCELLANEOUS SERVICE DA451 100.00% 98.82% 1.18%
1114 454-REVENUE-FACILITIES CHARGE DA454 100.00% 95.99% 4.01%
1115 908-OTHER CUSTOMER ASSISTANCE DA908 100.00% 96.12% 3.88%
1116 440-RETAIL SALES REVENUE RETREV 100.00% 95.02% 4.98%
1117 447-WHOLESALE SALES REVENUE RESREV #DIV/01 #DIV/01 #DIV/01
1118 IDAHO CIDA 100.00% 100.00% 0.00%
1119 OREGON CODA 100.00% 0.00% 100.00%
1120 NET TO GROSS TAX MULTIPLIER DA990 1.347 1.347 1.347
M.Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 91 of 202
Results of Operations Model

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE 1
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2023
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1121 -TABLE*TABLE 15-ALLOCATION FACTORS-RATIOS***
1122
1123 INTERNALLY DEVELOPED ALLOCATION FACTORS
1124 PLANT-PROD,TRANS&DIST PTO 100.00% 95.74% 4.26%
1125 LAB-PROD,TRANS,DIST,CUST ACCT&CSIS PTDCAS 100.00% 95.73% 4.27%
1126 PLANT-HYDRO,OTHER,TSUBS,DSUBS&GP P110P 100.00% 95.97% 4.03%
1127 PLANT-GEN PLT(390,391,397&398) P3908 100.00% 95.74% 4.26%
1128 PLANT-PROD,TRANS,DIST&GEN P101P 100.00% 95.74% 4.26%
1129 O&M-PROD,TRANS,DIST,CUST ACCT&CSIS SUBEX 100.00% 95.39% 4.61%
1130 LAB-PROD,TRANS,DIST,CUST ACCT&CSIS RELAB 100.00% 95.73% 4.27%
1131 LAB-ALL LABOR WITHOUT925-6"CIRC' LABOR 100.00% 95.73% 4.27%
1132 REV-RETAIL,RESALE&WHEELING FMREV 100.00% 95.06% 4.94%
1133 O&M-ALL EXCEPT FUEL O&M M 100.00% 95.38% 4.62%
1134 PLANT-89%*HYD PROD+11%*TRANS SURVEY 100.00% 96.05% 3.95%
1135 O&M-TOTAL(NOT USED) OM401 100.00% 95.46% 4.54%
M. Larkin Workpaper
Case No. IPC-E-24-07
Adjusted 2023 Page 92 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
9"**SUMMARY OF RESULTS"+
10
11 DEVELOPMENT OF RATE BASE COMPONENTS
12
13 ELECTRIC PLANT IN SERVICE 7,098,961,062 6,797,524,777 301,436,285
14 LESS:ACCUM PROVISION FOR DEPRECIATION 2,190,309,473 2,096,603,554 93,705,920
15 AMORT OF OTHER UTILITY PLANT 47,594,769 45,681,683 1,913,086
16 NET ELECTRIC PLANT IN SERVICE 4,861,056,819 4,655,239,540 205,817,279
17 LESS:CUSTOMER ADV FOR CONSTRUCTION 32,170,424 32,110,363 60,062
18 LESS:A000M DEFERRED INCOME TAXES 387,672,810 371,048,649 16,624,160
19 ADD:PLT HLD FOR FUTURE+ACQUIS ADJ 628,247 628,247 -
20 ADD:WORKING CAPITAL 139,484,205 133,445,511 6,038,694
21 ADD:CONSERVATION+OTHERDFRDFROG. 53,590,292 48,387,114 5,203,177
22 ADD:SUBSIDIARY RATE BASE 36,192,061 34,665,124 1,526,937
23
24 TOTAL COMBINED RATE BASE 4,671,108,390 4,469,206,525 201,901,865
25
26 RATE OF RETURN UNDER PRESENT RATES
27 OPERATING REVENUES
28 SALES REVENUES 1,312,879,048 1,257,826,285 55,052,763
29 OTHER OPERATING REVENUES 90,445,486 86,982,202 3,463,284
30 TOTAL OPERATING REVENUES 1,403,324,534 1,344,808,487 58,516,046
31 OPERATING EXPENSES
32 OPERATION&MAINTENANCE EXPENSES 934,441,471 893,018,187 41,423,284
33 DEPRECIATION EXPENSE 174,034,269 166,800,152 7,234,117
34 AMORTIZATION OF LIMITED TERM PLANT 8,949,407 8,584,623 364,784
35 ACCRETION EXPENSE 12,995 12,485 509
36 TAXES OTHER THAN INCOME 25,554,161 23,444,410 2,109,751
37 REGULATORY DEBITS/CREDITS 5,657,329 5,339,621 317,709
38 PROVISION FOR DEFERRED INCOME TAXES (15,424,032) (14,807,844) (616,189)
39 INVESTMENT TAX CREDIT ADJUSTMENT 124,171,136 118,895,080 5,276,056
40 FEDERAL INCOME TAXES (101,146,838) (97,812,600) (3,334,238)
41 STATE INCOME TAXES (10,557,516) (10,149,457) (408,059)
42 TOTAL OPERATING EXPENSES 1,145,692,381 1,093,324,658 52,367,723
43 OPERATING INCOME 257,632,152 251,483,829 6,148,323
44 ADD: IER00 OPERATING INCOME E10 8,033,987 7,695,035 338,953
45 CONSOLIDATED OPERATING INCOME 265,666,140 259,178,864 6,487,276
46
47 RATE OF RETURN UNDER PRESENT RATES 5.69% 5.80% 3.21%
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 93 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
48"**SUMMARY OF RESULTS
49
50 RATE OF RETURN UNDER PRESENT RATES
51 TOTAL COMBINED RATE BASE 4,671,108,390 4,469,206,525 201,901,865
52
53 SALES REVENUES 1,312,879,048 1,257,826,285 55,052,763
54 OTHER OPERATING REVENUES 90,445,486 86,982,202 3,463,284
55 TOTAL OPERATING REVENUES 1,403,324,534 1,344,808,487 58,516,046
56 OPERATING EXPENSES
57 OPERATION&MAINTENANCE EXPENSES 934,441,471 893,018,187 41,423,284
58 DEPRECIATION EXPENSE 174,034,269 166,800,152 7,234,117
59 AMORTIZATION OF LIMITED TERM PLANT 8,949,407 8,584,623 364,784
60 ACCRETION EXPENSE 12,995 12,485 509
61 TAXES OTHER THAN INCOME 25,554,161 23,444,410 2,109,751
62 REGULATORY DEBITS/CREDITS 5,657,329 5,339,621 317,709
63 PROVISION FOR DEFERRED INCOME TAXES (15,424,032) (14,807,844) (616,189)
64 INVESTMENT TAX CREDIT ADJUSTMENT 124,171,136 118,895,080 5,276,066
65 FEDERAL INCOME TAXES (101,146,838) (97,812,600) (3,334,238)
66 STATE INCOME TAXES (10,557,516) (10,149,457) (408,059)
67 TOTAL OPERATING EXPENSES 1,145,692,381 1,093,324,658 52,367,723
68 OPERATING INCOME 257,632,152 251,483,829 6,148,323
69 ADD: IER00 OPERATING INCOME 8,033,987 7,695,035 338,953
70 CONSOLIDATED OPERATING INCOME 265,666,140 259,178,864 6,487,276
71 RATE OF RETURN UNDER PRESENT RATES 5.69% 5.80% 3.21%
72
73 DEVELOPMENT OF REVENUE REQUIREMENTS
74 RATE OF RETURN REQUIRED(BASED ON 10%ROE) 7.247% 7.247%
75
76 RETURN AT CLAIMED RATE OF RETURN 338,515,225 323,883,397 14,631,828
77 EARNINGS DEFICIENCY 72,849,085 64,704,533 8,144,552
78 ADD:CWIP(RELICENSING) 6,815,472 6,520,122 295,350
79 DEFICIENCY WITH CWIP 79,664,557 71,224,655 8,439,902
80
81 NET-TO-GROSS TAX MULTIPLIER 1.347 1.347 1.347
82
83 REVENUE DEFICIENCY 107,308,159 95,939,611 11,368,548
84
85 FIRM JURISDICTIONAL REVENUES 1,283,843,868 1,230,016,095 53,827,773
86
87 PERCENT INCREASE REQUIRED 8.36% 7.80% 21.12%
88
89 SALES AND WHEELING REVENUES REQUIRED 1,391,152,027 1,325,955,705 65,196,321
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 94 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
6 DESCRIPTION SOURCE SYSTEM IPUC OPUC
90-TABLE*TABLE 1-ELECTRIC PLANT IN SERVICE***
91
92 INTANGIBLE PLANT
93 301-ORGANIZATION P101P 5,703 5,461 242
94302-FRANCHISES&CONSENTS 310 67,301,183 64,641,493 2,659,690
95303-MISCELLANEOUS P101P 77,770,770 74,466,275 3,304,495
96
97 TOTAL INTANGIBLE PLANT 145,077,656 139,113,229 5,964,428
98
99 PRODUCTION PLANT
100 310-316/STEAM PRODUCTION 310 297,714,102 285,948,673 11,765,429
101330-336/HYDRAULIC PRODUCTION D10 1,211,835,338 1,163,944,550 47,890,789
102 340-346/OTHER PRODUCTION-LANGLEY D10 415,522,763 399,101,627 16,421,136
103 340-346/OTHER PRODUCTION-DANSKIN/BENNETT MTN D10 202,289,103 194,294,795 7,994,308
104
105 TOTAL PRODUCTION PLANT 2,127,361,308 2,043,289,646 84,071,662
106
107 TRANSMISSION PLANT
108 350/LAND&LAND RIGHTS
109 SYSTEM TRANSMISSION SERVICE D11 45,123,558 43,340,310 1,783,248
110 DIRECT ASSIGNMENT DA350 - - -
111 TOTAL ACCOUNT350 45,123,558 43,340,310 1,783,248
112
113 352/STRUCTURES&IMPROVEMENTS
114 SYSTEM TRANSMISSION SERVICE D11 110,977,804 106,592,048 4,385,756
115 DIRECT ASSIGNMENT DA352 658 - 658
116 TOTAL ACCOUNT 352 110,978,462 106,592,048 4,386,415
117
118 353/STATION EQUIPMENT
119 SYSTEM TRANSMISSION SERVICE D11 509,721,302 489,577,513 20,143,789
120 DIRECT ASSIGNMENT DA353 111,594 75,100 36,494
121 TOTAL ACCOUNT 353 509,832,896 489,652,613 20,180,283
M. Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 95 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
122"*"TABLE 1-ELECTRIC PLANT IN SERVICE
123
124 354/TOWERS&FIXTURES
125 SYSTEM TRANSMISSION SERVICE D11 249,756,890 239,886,692 9,870,198
126 DIRECT ASSIGNMENT DA354 - - -
127 TOTAL ACCOUNT354 249,756,890 239,886,692 9,870,198
128
129 355/POLES&FIXTURES
130 SYSTEM TRANSMISSION SERVICE D11 271,451,233 260,723,692 10,727,541
131 DIRECT ASSIGNMENT DA355 33,842 - 33,842
132 TOTAL ACCOUNT 355 271,485,075 260,723,692 10,761,383
133
134 356/OVERHEAD CONDUCTORS&DEVICES
135 SYSTEM TRANSMISSION SERVICE D11 290,260,290 278,789,429 11,470,861
136 DIRECT ASSIGNMENT DA356 26,495 1,189 25,306
137 TOTAL ACCOUNT 356 290,286,785 278,790,618 11,496,167
138
139 359/ROADS&TRAILS
140 SYSTEM TRANSMISSION SERVICE D11 406,231 390,177 16,054
141 DIRECT ASSIGNMENT DA359 - - -
142 TOTAL ACCOUNT 359 406,231 390,177 16,054
143
144 TOTAL TRANSMISSION PLANT 1,477,869,896 1,419,376,150 58,493,747
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 96 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
145***TABLE 1-ELECTRIC PLANT IN SERVICE*"
146
147 DISTRIBUTION PLANT
148
149 360/LAND&LAND RIGHTS ACCT360 9,815,237 9,399,050 416,188
150 361/STRUCTURES&IMPROVEMENTS ACCT361 73,809,666 70,595,724 3,213,942
151 362/STATION EQUIPMENT ACCT362 361,390,672 346,674,746 14,715,926
152 363/BATTERY STORAGE DIO 307,577,615 295,422,387 12,155,228
153 364/POLES,TOWERS&FIXTURES DA364 366,804,146 338,067,715 28,736,431
154 365/OVERHEAD CONDUCTORS&DEVICES DA365 172,940,993 163,251,293 9,689,700
155 366/UNDERGROUND CONDUIT DA366 62,328,189 61,327,088 1,001,101
156 367/UNDERGROUND CONDUCTORS&DEVICES DA367 385,071,509 379,263,738 5,807,772
157368/LINE TRANSFORMERS ACCT368 824,478,027 779,265,187 45,212,840
158 369/SERVICES DA369 74,883,706 71,799,683 3,084,023
159 370/METERS ACCT370 124,776,385 120,955,838 3,820,547
160 371/INSTALLATIONS ON CUSTOMER PREMISES DA371 6,504,019 6,077,640 426,379
161 373/STREET LIGHTING SYSTEMS DA373 7,620,938 7,241,643 379,296
162
163 TOTAL DISTRIBUTION PLANT 2,778,001,103 2,649,341,730 128,659,372
164
165 GENERAL PLANT
166 389/LAND&LAND RIGHTS PTD 21,145,439 20,246,965 898,474
167 390/STRUCTURES&IMPROVEMENTS PTD 178,056,002 170,490,368 7,665,634
168391/OFFICE FURNITURE&EQUIPMENT PTD 46,142,473 44,181,870 1,960,603
169392/TRANSPORTATION EQUIPMENT PTD 149,671,758 143,312,176 6,359,582
170 393/STORES EQUIPMENT PTD 9,276,437 8,882,279 394,158
171 394/TOOLS,SHOP&GARAGE EQUIPMENT PTD 16,531,852 15,829,411 702,442
172 395/LABORATORY EQUIPMENT PTD 17,688,809 16,937,208 751,601
173 396/POWER OPERATED EQUIPMENT PTD 32,527,731 31,145,621 1,382,110
174 397/COMMUNICATIONS EQUIPMENT PTD 88,540,127 84,778,040 3,762,087
175 398/MISCELLANEOUS EQUIPMENT PTD 11,070,472 10,600,085 470,386
176
177 TOTAL GENERAL PLANT 570,651,099 546,404,023 24,247,076
178
179 TOTAL ELECTRIC PLANT IN SERVICE 7,098,961,062 6,797,524,777 301,436,285
180
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 97 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
181 ***TABLE 2-ACCUMULATED PROVISION FOR DEPRECIATION*'
182
183 PRODUCTION PLANT
184 310-316/STEAM PRODUCTION L100 192,595,403 184,984,183 7,611,220
185 330-336/HYDRAULIC PRODUCTION L101 536,257,268 515,064,799 21,192,470
186 340-346/OTHER PRODUCTION-LANGLEY L102 86,016,347 82,617,048 3,399,299
187 340-346/OTHER PRODUCTION-DANSKIN/BENNETT MTN L 103 64,781,409 62,221,298 2,560,111
188 TOTAL PRODUCTION PLANT 879,650,427 844,887,327 34,763,100
189
190 TRANSMISSION PLANT
191 350/LAND&LAND RIGHTS L 111 10,640,184 10,219,692 420,492
192352/STRUCTURES&IMPROVEMENTS L116 35,178,162 33,787,748 1,390,414
193 353/STATION EQUIPMENT L 121 125,602,861 120,631,230 4,971,631
194 354/TOWERS&FIXTURES L 127 82,555,492 79,292,963 3,262,529
195 355/POLES&FIXTURES L 132 81,819,694 78,576,448 3,243,247
196 356/OVERHEAD CONDUCTORS&DEVICES L 137 89,515,586 85,970,519 3,545,067
197359/ROADS&TRAILS L142 300,145 288,284 11,861
198 TOTAL TRANSMISSION PLANT 425,612,124 408,766,883 16,845,241
199
200 DISTRIBUTION PLANT
201 360/LAND&LAND RIGHTS L 149 267,036 255,713 11,323
202 361/STRUCTURES&IMPROVEMENTS L 150 17,597,451 16,831,194 766,257
203 362/STATION EQUIPMENT L 151 76,945,502 73,812,260 3,133,242
204 363 1 BATTERY STORAGE L 152 7,339,093 7,049,058 290,035
205 364/POLES,TOWERS&FIXTURES L 153 148,616,411 136,973,399 11,643,013
206365/OVERHEAD CONDUCTORS&DEVICES L154 59,437,082 56,106,885 3,330,196
207 366/UNDERGROUND CONDUIT L 155 19,957,781 19,637,224 320,557
208 367/UNDERGROUND CONDUCTORS&DEVICES L 156 109,843,417 108,186,724 1,656,694
209 368/LINE TRANSFORMERS L 157 206,097,998 194,795,968 11,302,031
210 369/SERVICES L 158 46,522,754 44,606,753 1,916,001
211 370/METERS L 159 40,491,460 39,251,646 1,239,814
212 371/INSTALLATIONS ON CUSTOMER PREMISES L 160 1,018,383 951,621 66,761
213373/STREET LIGHTING SYSTEMS L161 1,852,662 1,760,454 92,207
214 TOTAL DISTRIBUTION PLANT 735,987,029 700,218,898 35,768,131
215
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 98 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
216***TABLE 2-ACCUMULATED PROVISION FOR DEPRECIATION
217
218 GENERAL PLANT
219 389/LAND&LAND RIGHTS L 166 - - -
220390/STRUCTURES&IMPROVEMENTS L167 37,467,073 35,875,090 1,591,983
221 391/OFFICE FURNITURE&EQUIPMENT L 168 19,565,369 18,734,033 831,336
222 392/TRANSPORTATION EQUIPMENT L 169 27,046,555 25,897,341 1,149,213
223 393/STORES EQUIPMENT L 170 1,688,739 1,616,985 71,755
224 394/TOOLS,SHOP&GARAGE EQUIPMENT L 171 5,388,701 5,159,734 228,967
225 395/LABORATORY EQUIPMENT L172 7,306,941 6,996,467 310,473
226 396 1 POWER OPERATED EQUIPMENT L 173 6,817,185 6,527,521 289,664
227 397/COMMUNICATIONS EQUIPMENT L174 36,291,244 34,749,222 1,542,022
228 398/MISCELLANEOUS EQUIPMENT L 175 4,486,993 4,296,340 190,653
229 TOTAL GENERAL PLANT 146,058,799 139,852,732 6,206,067
230
231 UNDER-/OVERALLOCATED SALVAGE L 97 - - -
232 TOTAL DEPR BEFORE FAS 143/OTHER 2,187,308,379 2,093,725,841 93,582,539
233
234 FAS 143 ADJ&/OR DISALLOWED COSTS L 97 3,001,094 2,877,713 123,381
235 TOTAL ACCUM PROVISION DEPRECIATION 2,190,309,473 2,096,603,554 93,705,920
236
237 AMORTIZATION OF OTHER UTILITY PLANT
238 INTANGIBLE PLANT L 97 20,202,730 19,372,156 830,574
239 HYDRAULIC PRODUCTION L101 27,392,039 26,309,527 1,082,512
240
241 TOTAL AMORT OF OTHER UTILITY PLANT 47,594,769 45,681,683 1,913,086
242
243 TOTAL ACCUM PROVISION FOR DEPR
244 &AMORTIZATION OF OTHER UTILITY PLANT 2,237,904,242 2,142,285,237 95,619,006
245
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 99 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
246***TABLE 3-ADDITIONS&DELETIONS TO RATE BASE"
247
248 NET ELECTRIC PLANT IN SERVICE 4,861,056,819 4,655,239,540 205,817,279
249 LESS:
250 252 CUSTOMER ADVANCES FOR CONSTRUCTION
251 POWER SUPPLY D10 - - -
252 OTHER DA252 32,170,424 32,110,363 60,062
253 TOTAL CUSTOMER ADV FOR CONSTRUCTION 32,170,424 32,110,363 60,062
254
255 ACCUMULATED DEFERRED INCOME TAXES
256 190/ACCUMULATED DEFERRED INCOME TAXES
257 CUSTOMER ADVANCES FOR CONSTRUCTION DA252 (3,854,109) (3,846,913) (7,196)
258 OTHER LABOR (13,759,745) (13,170,392) (589,353)
259 TOTAL ACCOUNT190 (17,613,854) (17,017,305) (596,549)
260 281/ACCELERATED AMORTIZATION P101P - - -
261 282/OTHER PROPERTY P101P 395,105,792 378,317,670 16,788,122
262 283/OTHER P101P 10,180,872 9,748,285 432,587
263 TOTAL ACCUM DEFERRED INCOME TAXES 387,672,810 371,048,649 16,624,160
264
265 NET ELECTRIC PLANT IN SERVICE 4,441,213,585 4,252,080,528 189,133,057
266 ADD:
267 WORKING CAPITAL
268 151/FUEL INVENTORY E10 19,716,209 18,884,385 831,824
269 154/PLANT MATERIALS&SUPPLIES
270 PRODUCTION-GENERAL L 105 14,733,716 14,151,451 582,265
271 TRANSMISSION-GENERAL L 143 32,918,344 31,615,444 1,302,900
272 DISTRIBUTION-GENERAL L 163 67,378,274 64,257,741 3,120,534
273 OTHER-UNCLASSIFIED L 179 4,737,661 4,536,490 201,171
274 TOTAL ACCOUNT154 119,767,996 114,561,126 5,206,870
275 165/PREPAID ITEMS
276 AD VALOREM TAXES L 707 - - -
277 OTHER PROD-RELATED PREPAYMENTS D70 - - -
278 INSURANCE L 105 - - -
279 PENSION-RELATED PREPAYMENTS L 1002 - - -
280 SOFTWARE CONTRACTS L 95 - - -
281 MISCELLANEOUS PREPAYMENTS P101P - - -
282 TOTAL ACCOUNT 165 - - -
283 WORKING CASH ALLOWANCE L 623 - - -
284
285 TOTAL WORKING CAPITAL 139,484,205 133,445,511 6,038,694
286
287 NET ELECTRIC PLANT IN SERVICE 4,580,697,790 4,385,526,039 195,171,751
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 100 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
288***TABLE 3-ADDITIONS&DELETIONS TO RATE BASE"
289
290 NET ELECTRIC PLANT IN SERVICE 4,580,697,790 4,385,526,039 195,171,751
291 ADD:
292 105/PLANT HELD FOR FUTURE USE
293 HYDRAULIC PRODUCTION L 101 - - -
294 TRANS LAND&LAND RIGHTS L III - - -
295 TRANS STRUCTURES&IMPROVEMENTS L 116 - - -
296 TRANS STATION EQUIPMENT L 121 - - -
297 DIST LAND&LAND RIGHTS L 149 - - -
298 DIST STRUCTURES&IMPROVEMENTS L 150 - - -
299 GEN LAND&LAND RIGHTS L 166 - - -
300 GEN STRUCTURES&IMPROVEMENTS L 167 - - -
301 TOTAL PLANT HELD FOR FUTURE USE - - -
302
303 ELECTRIC PLANT ACQUISITION ADJ.-1 14/5 CIDA 628,247 628,247 -
304
305 DEFERRED PROGRAMS:
306 182/CONSERVATION PROGRAMS
307 IDAHO DEFERRED CONSERVATION PROGRAMS CIDA - - -
308 OREGON DEFERRED CONSERVATION PROGRAMS CODA - - -
309 TOTAL CONSERVATION PROGRAMS - - -
310 182/MISC.OTHER REGULATORY ASSETS
311 CUB FUND INTEREST-OPUC ORDERI5-399 CODA 59,702 - 59,702
312 AM.FALLS BOND REFINANCE D10 72,977 70,093 2,884
313 SFAS 87 CAPITALIZED PENSION-OPUC ORDER 10-064 CODA 7,096,835 - 7,096,835
314 CLOUD COMPUTING-IPUC ORDER 34707 CIDA 1,250,083 1,250,083 -
315 WILDFIRE MITIGATION-IPUC ORDER 35077 CIDA 26,678,227 26,678,227 -
316 SIEMENS LTP DEFERRED RATE BASE-IPUC ORDER 33420 CIDA 8,181,006 8,181,006 -
317 SIEMENS LTP RATE BASE-IPUC ORDER 33420 CIDA 12,207,705 12,207,705 -
318 SIEMENS LTP DEFERRED RATE BASE-OPUC ORDER 15-387 CODA 343,307 - 343,307
319 SIEMENS LTP RATE BASE-OPUC ORDER 15-387 CODA 471,789 - 471,789
320 TOTAL OTHER REGULATORY ASSETS 56,361,632 48,387,114 7,974,517
321 186/MISC.OTHER DEFERRED PROGRAMS EIO - - -
322 254/JIM BRIDGER PLANT END OF LIFE DEPR-OPUC ORD 12-296 CODA (2,753,872) - (2,753,872)
323 RECONNECT FEES-OPUC ADV 16-09 CODA (17,468) - (17,468)
324 TOTAL DEFERRED PROGRAMS 53,590,292 48,387,114 5,203,177
325
326 DEVELOPMENT OF IERCO RATE BASE
327 INVESTMENT IN IERCO EIO 18,375,460 17,600,202 775,258
328 PREPAID COAL ROYALTIES EIO 606,862 581,259 25,603
329 NOTES RECEIVABLE FROM SUBSIDIARY EIO 17,209,739 16,483,663 726,076
330 TOTAL SUBSIDIARY RATE BASE 36,192,061 34,665,124 1,526,937
331
332 TOTAL COMBINED RATE BASE 4,671,108,390 4,469,206,525 201,901,865
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 101 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
333"*"TABLE 4-OPERATING REVENUES
334 OPERATING REVENUES
335 FIRM ENERGY SALES
336440-448/RETAIL RETREV 1,283,843,868 1,230,016,095 53,827,773
337 4471 FIRM SALES FOR RESALE E10 - - -
338447/SYSTEM OPPORTUNITY SALES E10 29,035,180 27,810,191 1,224,989
339 TOTAL SALES OF ELECTRICITY 1,312,879,048 1,257,826,285 55,052,763
340
341 OTHER OPERATING REVENUES
342 415/MERCHANDISING REVENUES D60 4,655,894 4,483,811 172,083
343
344 449/OATT TARIFF REFUND
345 NETWORK D11 - - -
346 POINT-TO-POINT D11 - - -
347 TOTAL ACCOUNT 449 - - -
348
349 451/MISCELLANEOUS SERVICE REVENUES DA451 5,220,513 5,158,858 61,655
350
351 454/RENTS FROM ELECTRIC PROPERTY
352 SUBSTATION EQUIPMENT L121 3,272,778 3,143,234 129,544
353 TRANSFORMER RENTALS 311 17,330 16,645 685
354 LINE RENTALS 311 - - -
355 COGENERATION L 490 1,896,418 1,816,408 80,010
356 DARK FIBER PROJECT CIDA 66,667 66,667 -
357 POLE ATTACHMENTS L 153 1,756,476 1,618,869 137,607
358 FACILITIES CHARGES DA454 10,841,971 10,407,743 434,228
359 OTHER RENTALS L101 1,246,139 1,196,893 49,246
360 WATER LEASE E10 66,960 64,135 2,825
361 TOTAL ACCOUNT454 19,164,738 18,330,593 834,145
362
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 102 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
363 4561 OTHER ELECTRIC REVENUES
364 TRANSMISSION-NETWORK SERVICES D11 10,740,800 10,316,332 424,468
365 TRANSMISSION-NETWORK SERVICES-DISTFACILITIES D60 765,132 736,853 28,279
366 TRANSMISSION-POINT-TO-POINT D71 49,148,205 47,205,906 1,942,299
367 ALTERNATE TRANSMISSION SERV.CHG. L 144 - - -
368 PHOTOVOLTAIC STATION SERVICE L 163 - - -
369 DSM RIDER FUNDS DARIDER - - -
370 STANDBY SERVICE CHARGE CIDA 741,858 741,858 -
371 SIERRA PACIFIC USAGE CHARGE Eio - - -
372 BPA-OTHER REVENUE Dio - - -
373 ANTELOPE L 515 - - -
374 MISCELLANEOUS PTD 8,346 7,991 355
375 TOTAL ACCOUNT 456 61,404,340 59,008,940 2,395,401
376
377 TOTAL OTHER OPERATING REVENUES 90,445,486 86,982,202 3,463,284
378
379 TOTAL OPERATING REVENUES 1,403,324,534 1,344,808,487 58,516,046
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 103 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
380***TABLE 5-OPERATION&MAINTENANCE EXPENSES
381
382 STEAM POWER GENERATION
383 OPERATION
384500/SUPERVISION&ENGINEERING DIO (147,309) (141,488) (5,822)
385 501/FUEL E10 65,523,000 62,758,595 2,764,405
386
387 502/STEAM EXPENSES
388 LABOR DIO - - -
389 OTHER E10 (2,000) (1,916) (84)
390 TOTAL ACCOUNT 502 (2,000) (1,916) (84)
391 505/ELECTRIC EXPENSES
392 LABOR D10 - - -
393 OTHER E10 (0) (0) (0)
394 TOTAL ACCOUNT 505 (0) (0) (0)
395 506/MISCELLANEOUS EXPENSES DIO (59) (57) (2)
396 507/RENTS L 100 - - -
397 TOTAL STEAM OPERATION EXPENSES 65,373,631 62,615,135 2,758,496
398
399 MAINTENANCE
400 510/SUPERVISION&ENGINEERING DIO (282,132) (270,982) (11,150)
401 511 /STRUCTURES DIO (0) (0) (0)
402 512/BOILER PLANT
403 LABOR D70 - - -
404 OTHER E10 0 0 0
405 TOTAL ACCOUNT 512 0 0 0
406 513/ELECTRIC PLANT
407 LABOR DIO - - -
408 OTHER E10 - - -
409 TOTAL ACCOUNT 513 - - -
410 514/MISCELLANEOUS STEAM PLANT D10 0 0 0
411 TOTAL STEAM MAINTENANCE EXPENSES (282,131) (270,982) (11,150)
412
413 TOTAL STEAM GENERATION EXPENSES 65,091,500 62,344,153 2,747,347
414
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 104 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
415***TABLE 5-OPERATION&MAINTENANCE EXPENSES
416
417 HYDRAULIC POWER GENERATION
418 535/SUPERVISION&ENGINEERING L 879 5,490,907 5,272,917 217,990
419 536/WATER FOR POWER
420 WATER LEASE D10 - - -
421 OTHER D10 3,312,731 3,181,814 130,917
422 TOTAL ACCOUNT 536 3,312,731 3,181,814 130,917
423
424 537/HYDRAULIC EXPENSES DIO 19,552,157 18,779,471 772,686
425 538/ELECTRIC EXPENSES
426 LABOR DIO 1,915,562 1,839,861 75,702
427 OTHER E10 513,003 491,360 21,644
428 TOTAL ACCOUNT 538 2,428,565 2,331,220 97,345
429
430 539/MISCELLANEOUS EXPENSES DIO 6,049,766 5,810,684 239,082
431 540/RENTS DIO 311,854 299,530 12,324
432
433 TOTAL HYDRAULIC OPERATION EXPENSES 37,145,981 35,675,637 1,470,344
434
435 MAINTENANCE
436 5411 SUPERVISION&ENGINEERING L 885 298,844 287,034 11,810
437542/STRUCTURES DIO 937,125 900,090 37,034
438 543/RESERVOIRS,DAMS&WATERWAYS D10 2,361,075 2,267,768 93,308
439 5"/ELECTRIC PLANT
440 LABOR DIO 1,725,010 1,656,839 68,171
441 OTHER E10 697,230 667,814 29,416
442 TOTAL ACCOUNT 544 2,422,240 2,324,653 97,587
443
444 545/MISCELLANEOUS HYDRAULIC PLANT L 101 3,701,651 3,555,365 146,286
445
446 TOTAL HYDRAULIC MAINTENANCE EXPENSES 9,720,935 9,334,909 386,026
447
448 TOTAL HYDRAULIC GENERATION EXPENSES 46,866,916 45,010,546 1,856,370
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 105 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
449***TABLE 5-OPERATION&MAINTENANCE EXPENSES
450 OTHER POWER GENERATION
451 OPERATION
452 546/SUPERVISION&ENGINEERING L 892 759,844 729,816 30,028
453 547/FUEL
454 SALMON DIESEL E10 16,517 15,820 697
455 OTHER E10 119,653,675 114,605,506 5,048,169
456 TOTAL ACCOUNT547 119,670,192 114,621,327 5,048,866
457
458 548/GENERATING EXPENSES
459 LABOR DIO 470,542 451,946 18,595
460 OTHER E10 5,285,971 5,062,957 223,014
461 TOTAL ACCOUNT548 5,756,513 5,514,903 241,610
462
463 549/MISCELLANEOUS EXPENSES DIO 933,018 896,145 36,872
464 550/RENTS DIO - - -
465
466 TOTAL OTHER POWER OPER EXPENSES 127,119,567 121,762,191 5,357,376
467
468 MAINTENANCE
469 551/SUPERVISION&ENGINEERING L 898 - - -
470552/STRUCTURES D70 148,767 142,887 5,879
471 553/GENERATING&ELECTRIC PLANT
472 LABOR DIO 71,469 68,645 2,824
473 OTHER E10 (91,258) (87,407) (3,850)
474 TOTAL ACCOUNT 553 (19,788) (18,763) (1,026)
475
476554/MISCELLANEOUS EXPENSES L103 5,257,613 5,049,837 207,777
477 TOTAL OTHER POWER MAINT EXPENSES 5,386,592 5,173,962 212,630
478
479 TOTAL OTHER POWER GENERATION EXP 132,506,159 126,936,153 5,570,006
480
M. Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 106 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
481 OTHER POWER SUPPLY EXPENSE
482 555.0/PURCHASED POWER
483 PURCHASED POWER-TRANS LOSSES E10 1,096,106 1,049,861 46,245
484 DEMAND RESPONSE INCENTIVES CIDA 10,240,003 10,240,003 -
485 OTHER PURCHASED POWER E10 99,465,021 95,268,608 4,196,413
486 TOTAL ACCOUNT555.0 110,801,130 106,558,473 4,242,657
487 555.1/COGENERATION&SMALL POWER PROD
488 CAPACITY RELATED D70 - - -
489 ENERGY RELATED E10 214,448,755 205,401,197 9,047,658
490 TOTAL COGEN&SMALL POWER PROD 214,448,755 205,401,197 9,047,558
491
492 TOTAL ACCOUNT555 325,249,885 311,959,670 13,290,215
493
494 556/LOAD CONTROL&DISPATCHING EXPENSES D10 - - -
495 557/OTHER EXPENSES
496 IDAHO POWER COST-RELATED EXPENSES CIDA 11,089,392 11,089,392 -
497 OREGON POWER COST-RELATED EXPENSES CODA 2,742,786 - 2,742,786
498 OTHER D10 2,238,194 2,149,742 88,452
499 TOTAL ACCOUNT 557 16,070,371 13,239,134 2,831,237
500
501 TOTAL OTHER POWER SUPPLY EXPENSES 341,320,256 325,198,804 16,121,452
502
503 TOTAL PRODUCTION EXPENSES 585,784,831 559,489,656 26,296,175
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 107 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
504***TABLE 5-OPERATION&MAINTENANCE EXPENSES
505
506 TRANSMISSION EXPENSES
507
508 OPERATION
509 560/SUPERVISION&ENGINEERING L 144 3,095,555 2,973,034 122,521
510 561/LOAD DISPATCHING D12 5,982,841 5,746,404 236,437
511 562/STATION EXPENSES L121 2,827,336 2,715,424 111,912
512 563 1 OVERHEAD LINE EXPENSES L127+132+137 1,307,218 1,255,466 51,752
513 565/TRANSMISSION OF ELECTRICITY BY OTHERS E10 10,263,139 9,830,139 433,000
514 566/MISCELLANEOUS EXPENSES L 144 - - -
515 567/RENTS L 144 5,051,708 4,851,762 199,945
516
517 TOTAL TRANSMISSION OPERATION 28,527,797 27,372,229 1,155,568
518
519 MAINTENANCE
520568/SUPERVISION&ENGINEERING L144 381,737 366,628 15,109
521 569/STRUCTURES L116 1,905,784 1,830,458 75,326
522 570/STATION EQUIPMENT L 121 3,687,126 3,541,182 145,944
523 571/OVERHEAD LINES L 127+132+137 1,498,786 1,439,450 59,336
524 573/MISCELLANEOUS PLANT L 143 (78) (75) (3)
525 575/OPER TRANS MKT ADMIN-EIM L 144 703,023 675,198 27,825
526
527 TOTAL TRANSMISSION MAINTENANCE 8,176,378 7,852,840 323,537
528
529 TOTAL TRANSMISSION EXPENSES 36,704,175 35,225,070 1,479,105
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 108 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
530***TABLE 5-OPERATION&MAINTENANCE EXPENSES
531
532 DISTRIBUTION EXPENSES
533
534 OPERATION
535580/SUPERVISION&ENGINEERING L163 4,883,505 4,657,332 226,173
536 581/LOAD DISPATCHING D60 6,701,081 6,453,408 247,673
537 582/STATION EXPENSES L151 1,905,068 1,827,493 77,575
538 583/OVERHEAD LINE EXPENSES L 153+154 5,856,482 5,439,541 416,941
539 584/UNDERGROUND LINE EXPENSES L 155+156 5,744,802 5,657,373 87,429
540 585/STREET LIGHTING&SIGNAL SYSTEMS L 161 (17,461) (16,592) (869)
541 586/METER EXPENSES L 159 7,459,560 7,231,155 228,405
542 587/CUSTOMER INSTALLATIONS EXPENSE L160 1,444,874 1,350,153 94,721
543 588/MISCELLANEOUS EXPENSES L 163 4,637,720 4,422,930 214,790
544 589/RENTS L 163 639,456 609,840 29,616
545 TOTAL DISTRIBUTION OPERATION 39,255,088 37,632,635 1,622,453
546
547 MAINTENANCE
548 590/SUPERVISION&ENGINEERING L 163 5,684 5,421 263
549 591/STRUCTURES L 150 - - -
550 592/STATION EQUIPMENT L 151 5,931,659 5,690,120 241,539
551 593/OVERHEAD LINES L153+154 34,078,337 31,652,194 2,426,143
552 594/UNDERGROUND LINES L155+156 725,137 714,102 11,036
553595/LINE TRANSFORMERS L157 65,073 61,504 3,568
554 596/STREET LIGHTING&SIGNAL SYSTEMS L 161 149,941 142,478 7,463
555 597/METERS L 159 1,130,731 1,096,109 34,622
556 598/MISCELLANEOUS PLANT L163 185,410 176,823 8,587
557 TOTAL DISTRIBUTION MAINTENANCE 42,271,971 39,538,751 2,733,220
558
559 TOTAL DISTRIBUTION EXPENSES 81,527,059 77,171,386 4,355,674
560
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 109 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
561 CUSTOMER ACCOUNTING EXPENSES
562 901/SUPERVISION L 959 1,020,032 975,561 44,472
563902/METER READING CW902 2,160,189 1,868,578 291,611
564 903/CUSTOMER RECORDS&COLLECTIONS CW903 17,401,772 16,832,566 569,206
565904/UNCOLLECTIBLE ACCOUNTS CW904 3,830,484 3,458,798 371,686
566 905/MISC EXPENSES L 563+564+565 (358) (339) (19)
567 TOTAL CUSTOMER ACCOUNTING EXPENSES 24,412,119 23,135,163 1,276,955
568 CUSTOMER SERVICES&INFORMATION EXPENSES
569 907/SUPERVISION L 966 1,076,445 1,034,603 41,841
570 908/CUSTOMER ASSISTANCE
571 SYSTEM CONSERVATION E1oo 312,791 299,594 13,197
572 OTHER DA908 8,884,565 8,540,260 344,305
573 TOTAL ACCOUNT908 9,197,356 8,839,855 357,501
574 909/INFORMATION&INSTRUCTIONAL DA909 282,865 273,844 9,021
575 910/MISCELLANEOUS EXPENSES L 573+574 889,938 855,532 34,407
576 TOTAL CUSTSERV&INFORMATNEXPENSES 11,446,605 11,003,834 442,770
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 110 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
577***TABLE 5-OPERATION&MAINTENANCE EXPENSES
578 SALES EXPENSES
579 912/DEMO&SELLING EXPENSES E10 - - -
580 TOTAL ACCOUNT 924 - - -
581
582 ADMINISTRATIVE&GENERAL EXPENSES
583 920/ADMINISTRATIVE&GENERAL SALARIES LABOR 92,786,842 88,812,625 3,974,217
584 921/OFFICE SUPPLIES LABOR 16,584,609 15,874,262 710,347
585 922/ADMIN&GENERAL EXPENSES TRANSFERRED-CR LABOR (51,999,902) (49,772,659) (2,227,243)
586 923/OUTSIDE SERVICES LABOR 10,180,054 9,744,026 436,029
587 924/PROPERTY INSURANCE
588 PRODUCTION-STEAM DIO 465,139 446,757 18,382
589 ALL RISK&MISCELLANEOUS P110P 2,935,891 2,817,492 118,398
590 TOTAL ACCOUNT 924 3,401,030 3,264,249 136,780
591
592 925/INJURIES&DAMAGES LABOR 12,296,837 11,770,143 526,694
593 926/EMPLOYEE PENSIONS&BENEFITS LABOR 51,951,225 49,726,067 2,225,158
594 EMPLOYEE PENSIONS&BENEFITS-OREGON CODA 514,677 - 514,677
595 EMPLOYEE PENSIONS&BENEFITS-IDAHO CIDA 35,182,378 35,182,378 -
596 EMPLOYEE PENSIONS&BENEFITS-FERC D11 - - -
597 927/FRANCHISE REQUIREMENTS CIDA - - -
598 928/REGULATORY COMMISSION EXPENSES
599 FERC ADMIN ASSESS&SECURITIES
600 CAPACITY RELATED DIO 3,043,871 2,923,580 120,291
601 ENERGY RELATED E10 1,044,908 1,000,824 44,084
602 FERC RATE CASE D11 - - -
603 FERC ORDER472 E99 1,108,266 1,061,278 46,988
604 FERC OTHER D11 283,013 271,828 11,184
605 FERC-OREGON HYDRO FEE D11 271,717 260,979 10,738
606 SEC EXPENSES L 179 - - -
607 IDAHO PLC-RATE CASE CIDA - - -
608 -OTHER CIDA 48,457 48,457
609 OREGON PUC-RATE CASE CODA - - -
610 -OTHER CODA 329,733 - 329,733
611 TOTAL ACCOUNT 928 6,129,965 5,566,945 563,019
612
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 111 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
a DESCRIPTION SOURCE SYSTEM IPUC OPUC
613 929/DUPLICATE CHARGES LABOR - - -
614 930.1/GENERAL ADVERTISING LABOR - - -
615 930.2/MISCELLANEOUS EXPENSES LABOR 3,387,272 3,242,190 145,083
616 931/RENTS L 177 - - -
617 TOTAL ADM&GEN OPERATION 180,414,987 173,410,225 7,004,761
618
619935/GENERAL PLANT MAINTENANCE L177 8,280,911 7,929,054 351,858
620 TOTAL ADMIN&GENERAL EXPENSES 188,695,898 181,339,279 7,356,619
621
622 416/MERCHANDISING EXPENSE D60 5,870,784 5,653,799 216,985
623 TOTAL OPER&MAINT EXPENSES 934,441,471 893,018,187 41,423,284
624
M. Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 112 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
625***TABLE 6-DEPRECIATION&AMORTIZATION EXPENSE
626
627 DEPRECIATION EXPENSE
628 310-316/STEAM PRODUCTION L 100 10,246,819 9,841,873 404,946
629 330-336/HYDRAULIC PRODUCTION L101 29,099,413 27,949,427 1,149,986
630 340-346/OTHER PRODUCTION-LANGLEY L 102 12,559,576 12,063,232 496,345
631 340-346/OTHER PRODUCTION-DANSKIN/BENNETT MTN L 103 6,483,109 6,226,902 256,207
632 TOTAL PRODUCTION PLANT 58,388,917 56,081,433 2,307,485
633
634 TRANSMISSION PLANT
635 350/LAND&LAND RIGHTS L 111 477,848 458,964 18,884
636352/STRUCTURES&IMPROVEMENTS L116 2,161,701 2,076,260 85,441
637 353/STATION EQUIPMENT L 121 11,225,973 10,781,625 444,348
638 354/TOWERS&FIXTURES L127 2,950,779 2,834,166 116,612
639 355/POLES&FIXTURES L 132 7,018,607 6,740,397 278,210
640 356/OVERHEAD CONDUCTORS&DEVICES L 137 4,276,282 4,106,929 169,353
641 359/ROADS&TRAILS L 142 2,796 2,685 110
642 TOTAL TRANSMISSION PLANT 28,113,987 27,001,027 1,112,959
643
6"DISTRIBUTION PLANT
645 360/LAND&LAND RIGHTS L 149 27,253 26,097 1,156
646 361/STRUCTURES&IMPROVEMENTS L150 1,582,324 1,513,424 68,900
647 362/STATION EQUIPMENT L 151 6,685,998 6,413,742 272,256
648 363 1 BATTERY STORAGE L152 15,080,023 14,484,072 595,951
649 364/POLES,TOWERS&FIXTURES L 153 6,807,143 6,273,853 533,290
650 365/OVERHEAD CONDUCTORS&DEVICES L 154 3,769,855 3,558,634 211,221
651366/UNDERGROUND CONDUIT L155 1,424,328 1,401,450 22,877
652 367/UNDERGROUND CONDUCTORS&DEVICES L 156 8,603,139 8,473,384 129,755
653 368/LINE TRANSFORMERS L 157 15,695,524 14,834,810 860,713
654 369/SERVICES L 158 1,249,138 1,197,693 51,445
655 370/METERS L 159 6,169,537 5,980,631 188,906
656 371/INSTALLATIONS ON CUSTOMER PREMISES L 160 291,294 272,198 19,096
657 373/STREET LIGHTING SYSTEMS L 161 251,969 239,428 12,541
658 TOTAL DISTRIBUTION PLANT 67,637,523 64,669,417 2,968,106
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 113 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
659***TABLE 6-DEPRECIATION&AMORTIZATION EXPENSE*'
660
661 GENERALPLANT
662 389/LAND&LAND RIGHTS L 166 - - -
663390/STRUCTURES&IMPROVEMENTS L167 4,140,032 3,964,122 175,911
664 391/OFFICE FURNITURE&EQUIPMENT L 168 7,279,581 6,970,270 309,311
665 392/TRANSPORTATION EQUIPMENT L 169 6,037 5,781 257
666 393/STORES EQUIPMENT L 170 360,037 344,739 15,298
667 394/TOOLS,SHOP&GARAGE EQUIPMENT L 171 863,151 826,476 36,675
668 395/LABORATORY EQUIPMENT L172 935,849 896,085 39,764
669 396/POWER OPERATED EQUIPMENT L 173 - - -
670397/COMMUNICATIONSEQUIPMENT L174 5,859,096 5,610,142 248,954
671 398/MISCELLANEOUS EQUIPMENT L175 746,357 714,644 31,713
672 TOTAL GENERAL PLANT 20,190,141 19,332,258 857,883
673
674 403/BOARDMAN ARO DEPRECIATION EXP DAARO - - -
675 DEPR EXP BEFORE DISALLOWED COSTS 174,330,569 167,084,135 7,246,433
676
677 DEPRECIATION ON DISALLOWED COSTS L 675 (296,299) (283,983) (12,316)
678 TOTAL DEPRECIATION EXPENSE 174,034,269 166,800,152 7,234,117
679
680 AMORTIZATION EXPENSE
681 INTANGIBLE PLANT L 97 6,975,364 6,688,593 286,771
682 HYDRAULIC PRODUCTION L101 1,959,025 1,881,606 77,419
683 ADJUSTMENTS,GAINS&LOSSES L 97 15,018 14,424 593
684 TOTAL AMORTIZATION EXPENSE 8,949,407 8,584,623 364,784
685
686 TOTAL DEPRECIATION&AMORTIZATION EXP 182,983,676 175,384,775 7,598,900
687
688 411.093/4/ARO ACCRETION EXPENSE DAACCRETION 12,995 12,485 509
689
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 114 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
690***TABLE 7-TAXES OTHER THAN INCOME TAXES
691
692 TAXES OTHER THAN INCOME
693 FEDERALTAXES
694 FICA LABOR - - -
695 FUTA LABOR - - -
696 LESS PAYROLL DEDUCTION LABOR - - -
697
698 STATE TAXES
699 AD VALOREM TAXES
700 JIM BRIDGER STATION L100 1,310,444 1,258,656 51,788
701 VALMY L 100 279,802 268,744 11,058
702 BOARDMAN L 100 - - -
703 OTHER-PRODUCTION PLANT L 105 5,023,123 4,824,613 198,510
704 OTHER-TRANSMISSION PLANT L 143 5,094,471 4,892,833 201,638
705 OTHER-DISTRIBUTION PLANT L 163 6,775,452 6,461,656 313,796
706 OTHER-GENERAL PLANT L177 1,071,005 1,025,498 45,507
707 SUB-TOTAL 19,554,298 18,732,002 822,296
708
709 LICENSES-HYDRO PROJECTS L101 4,376 4,203 173
710
711 REGULATORY COMMISSION FEES
712 STATE OF IDAHO CIDA 2,837,473 2,837,473 -
713 STATE OF OREGON CODA 260,575 - 260,575
714
715 FRANCHISE TAXES
716 STATE OF OREGON CODA 944,305 - 944,305
717
718 OTHER STATE TAXES
719 UNEMPLOYMENTTAXES LABOR - - -
720 HYDRO GENERATION KWH TAX E10 1,659,564 1,589,547 70,017
721 IRRIGATION-PIC E10 293,571 281,185 12,386
722
723 CANADA GST TAXES E10 - - -
724
725 TOTAL TAXES OTHER THAN INCOME 25,554,161 23,444,410 2,109,751
726
727
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 115 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
728***TABLE 8-REGULATORY DEBITS/CREDITS
729 REGULATORY DEBITS/CREDITS
730 STATE OF IDAHO CIDA 5,339,621 5,339,621 -
731 STATE OF OREGON CODA 317,709 - 317,709
732
733 TOTAL REGULATORY DEBITS/CREDITS 5,657,329 5,339,621 317,709
734
735
736***TABLE 9-INCOME TAXES
737
738 410/411 NET PROVISION FOR DEFERRED INCOME TAXES
739 ACCOUNT#282-RELATED P101P (12,766,841) (12,224,375) (542,466)
740 ACCOUNTS#190&#283-RELATED L769 (2,657,192) (2,583,469) (73,723)
741 TOTAL NET PROVISION FOR DEFERRED INCOME TAXES (15,424,032) (14,807,8") (616,189)
742
743411.4-INVESTMENT TAX CREDIT ADJUSTMENT PIOIP 124,171,136 118,895,080 5,276,056
744
745 SUMMARY OF INCOME TAXES
746
747 TOTAL FEDERAL INCOME TAX L786 (101,146,838) (97,812,600) (3,334,238)
748
749 STATE INCOME TAX
750 STATE OF IDAHO L 852 (10,829,990) (10,430,400) (399,589)
751 STATE OF OREGON L 827 402,188 402,188 -
752 OTHER STATES L868 (129,714) (121,244) (8,470)
753 TOTAL STATE INCOME TAXES (10,557,516) (10,149,457) (408,059)
M. Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 116 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
754***TABLE 10-CALCULATION OF FEDERAL INCOME TAX
755
756 OPERATING REVENUES 1,403,324,534 1,344,808,487 58,516,046
757
758 OPERATING EXPENSES
759 OPERATION&MAINTENANCE 934,441,471 893,018,187 41,423,284
760 DEPRECIATION EXPENSE 174,034,269 166,800,152 7,234,117
761 AMORTIZATION OF LIMITED TERM PLANT 8,949,407 8,584,623 364,784
762 ACCRETION EXPENSE 12,995 12,485 509
763 TAXES OTHER THAN INCOME 25,554,161 23,444,410 2,109,751
764 REGULATORY DEBITS/CREDITS 5,657,329 5,339,621 317,709
765 TOTAL OPERATING EXPENSES 1,148,649,632 1,097,199,478 51,450,153
766
767 BOOK-TAX ADJUSTMENT L765 - - -
768
769 INCOME BEFORE TAX ADJUSTMENTS 254,674,902 247,609,009 7,065,893
770
771 INCOME STATEMENT ADJUSTMENTS
772 LONG TERM DEBT INTEREST EXPENSE L24 136,643,988 130,737,750 5,906,238
773 OTHER INTEREST EXPENSE L24 19,913,023 19,052,312 860,711
774 TOTAL INTEREST CHARGES 156,557,011 149,790,062 6,766,949
775
776 NET OPERATING INCOME BEFORE STATE INCOME TAXES 98,117,891 97,818,947 298,944
777
778 TOTAL STATE INCOME TAXES(ALLOWED) (6,673,025) (6,137,234) (535,791)
779
780 NET FEDERAL INCOME AFTER STATE INCOME TAXES 104,790,916 103,956,180 834,735
781
782 FEDERAL TAX AT 21 PERCENT 22,006,092 21,830,798 175,294
783 OTHER CURRENT TAX ADJUSTMENTS L782 (42,231,900) (41,895,493) (336,407)
784 PRIOR YEARS'TAX ADJUSTMENT L782 (9,810,034) (9,731,890) (78,144)
785
786 TOTAL FEDERAL INCOME TAX BEFORE OTHER ADJUSTMENTS (30,035,841) (29,796,584) (239,257)
787
788 OTHER TAX ADJUSTMENTS
789 ALLOWANCE FOR AFUDC P101P - - -
790 FEDERAL INCOME TAX ADJUSTMENTS-PLANT P101P (38,661,626) (37,018,886) (1,642,740)
791 FEDERAL INCOME TAX ADJUSTMENTS-OTHER L769 23,723,545 23,065,341 658,204
792 SUM OF OTHER ADJUSTMENTS (14,938,081) (13,953,545) (984,536)
793 FEDERAL TAX ON OTHER TAX ADJ AT 21 PERCENT (3,136,997) (2,930,244) (206,753)
794 FEDERAL GENERAL BUSINESS CREDITS P101P 67,974,000 65,085,772 2,888,228
795
796 TOTAL FEDERAL INCOME TAX (101,146,838) (97,812,600) (3,334,238)
M. Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 117 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
6 DESCRIPTION SOURCE SYSTEM IPUC OPUC
797***TABLE 11-OREGON STATE INCOME TAXES
798
799 NET OPERATING INCOME BEFORE TAXES-OREGON L776 98,117,891 97,818,947 298,944
800
801 ALLOWANCE FOR AFUDC P101P - - -
802
803 STATE INCOME TAX ADJUSTMENTS-PLANT P101P (38,661,626) (37,018,886) (1,642,740)
804 STATE INCOME TAX ADJUSTMENTS-OTHER L769 23,723,545 23,065,341 658,204
805 TOTAL STATE INCOME TAX ADJUSTMENTS (14,938,081) (13,953,545) (984,536)
806 ADD: MFG DEDUCTION NOT ALLOWED L 769 - - -
807
808 TOTAL STATE INCOME TAX ADJUSTMENTS-OREGON (14,938,081) (13,953,545) (984,536)
809
810 INCOME SUBJECT TO OREGON TAX 83,179,810 83,865,402 (685,592)
811
812 IERCO TAXABLE INCOME EIO 13,361,504 12,797,784 563,720
813 BONUS DEPRECIATION ADJUSTMENT P1o1P (6,823,240) (6,533,319) (289,921)
814 FEDERAL NOL L 750 - - -
815 TOTAL STATE TAXABLE INCOME-OREGON 89,718,074 90,129,867 (411,793)
816 APPORTIONMENT FACTOR(0.045454550) 4,096,813 4,096,813 -
817 POST APPORTIONMENT M ITEMS L 757 - - -
818 TOTAL TAXABLE INCOME-OREGON 4,096,813 4,096,813 -
819
820 OREGON TAX AT 6.6 PERCENT 270,390 270,390 -
821 LESS:INVESTMENT TAX CREDIT P101P - - -
822
823 STATE INCOME TAX ALLOWED-OREGON 270,390 270,390 -
824 ADD: FIN 48 ADJUSTMENT L 819 282,224 282,224 -
825 PRIOR YEARS'TAX ADJUSTMENT L 820 (150,426) (150,426) -
826
827 STATE INCOME TAX PAID-OREGON 402,188 402,188 -
828
M. Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 118 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
829***TABLE 12-IDAHO STATE INCOME TAXES
830
831 NET OPERATING INCOME BEFORE TAXES-IDAHO L 776 98,117,891 97,818,947 298,944
832
833 ALLOWANCE FOR AFUDC P101P - - -
834
835 STATE INCOME TAX ADJUSTMENTS-PLANT P101P (38,661,626) (37,018,886) (1,642,740)
836 STATE INCOME TAX ADJUSTMENTS-OTHER L769 23,723,545 23,065,341 658,204
837 STATE INCOME TAX ADJUSTMENTS (14,938,081) (13,953,545) (984,636)
838
839 INCOME SUBJECT TO IDAHO TAX 83,179,810 83,865,402 (685,592)
840
841 IERCO TAXABLE INCOME E10 13,361,504 12,797,784 563,720
842 BONUS DEPRECIATION ADJUSTMENT P101P (42,661,135) (40,848,455) (1,812,680)
843 FEDERAL NOL L 750 - - -
844 TOTAL STATE TAXABLE INCOME-IDAHO 53,880,179 55,814,731 (1,934,552)
845
846 IDAHO TAX AT 5.6 PERCENT 3,017,290 3,125,625 (108,335)
847 LESS:INVESTMENT TAX CREDIT P101P 10,057,246 9,629,912 427,334
848
849 STATE INCOME TAX ALLOWED-IDAHO (7,039,956) (6,504,287) (535,669)
850 ADD: FIN 48 ADJUSTMENT L 845 - - -
851 PRIOR YEARS'TAX ADJUSTMENT L846 (3,790,034) (3,926,114) 136,080
852 STATE INCOME TAX PAID-IDAHO (10,829,990) (10,430,400) (399,589)
853
854
855 OTHER STATE INCOME TAX
856 INCOME SUBJECT TO TAX 83,179,810 83,865,402 (685,592)
857
858 IERCO TAXABLE INCOME E10 13,361,504 12,797,784 563,720
859 BONUS DEPRECIATION ADJUSTMENT P101P - - -
860 FEDERAL NOL L 750 - - -
861 TOTAL TAXABLE INCOME BEFORE APPORTIONMENT-OTHER STATES 96,541,314 96,663,186 (121,872)
862 POST APPORTIONMENT M ITEMS L 757 - - -
863 TOTAL TAXABLE INCOME-OTHER STATES 96,541,314 96,663,186 (121,872)
864
865 OTHER TAX AT0.1PERCENT 96,541 96,663 (122)
866 ADD: FIN 48 ADJUSTMENT L 852 - - -
867 PRIOR YEARS'TAX ADJUSTMENT L852 (226,255) (217,907) (8,348)
868 OTHER STATES'INCOME TAX PAID (129,714) (121,244) (8,470)
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 119 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
869***TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCA TOR
870 STEAM POWER GENERATION
871 500-513/TOTAL STEAM GENERATION Dio 442,341 424,860 17,481
872 HYDRAULIC POWER GENERATION
873535/SUPERVISION&ENGINEERING L879 4,198,454 4,031,774 166,680
874536/WATER FOR POWER E10 870,626 833,895 36,732
875 537/HYDRAULIC EXPENSES D10 6,581,987 6,321,872 260,115
876 538/ELECTRIC EXPENSES D10 1,659,356 1,593,780 65,576
877 539/MISCELLANEOUS EXPENSES Dio 3,733,853 3,586,294 147,559
878 540/RENTS Dio - - -
879 TOTAL HYDRAULIC OPERATION EXPENSES 17,044,277 16,367,615 676,662
880 541/SUPERVISION&ENGINEERING L 885 167,910 161,275 6,636
881542/STRUCTURES Dio 567,222 544,806 22,416
882 543/RESERVOIRS,DAMS&WATERWAYS D70 301,175 289,273 11,902
883544/ELECTRIC PLANT Dio 1,724,170 1,656,032 68,138
884 545/MISCELLANEOUS HYDRAULIC PLANT Dio 2,266,086 2,176,532 89,554
885 TOTAL HYDRAULIC MAINTENANCE EXPENSES 5,026,564 4,827,918 198,646
886 TOTAL HYDRAULIC GENERATION EXPENSES 22,070,840 21,195,533 875,307
887 OTHER POWER GENERATION
888 546/SUPERVISION&ENGINEERING L 892 582,577 559,554 23,023
889 548/GENERATING EXPENSES Dio - - -
890549/MISCELLANEOUSEXPENSES Dio 3,495,474 3,357,336 138,138
891550/RENTS Dio 496,069 476,464 19,604
892 TOTAL OTHER POWER OPER EXPENSES 4,574,120 4,393,354 180,766
893
894 551/SUPERVISION&ENGINEERING L 898 - - -
895 552/STRUCTURES D70 47,812 45,922 1,889
896 553/GENERATING&ELECTRIC PLANT Dio 65,753 63,154 2,598
897 554/MISCELLANEOUS EXPENSES Dio 523,281 502,601 20,680
898 TOTAL OTHER POWER MAINT EXPENSES 636,845 611,678 25,168
899 TOTAL OTHER POWER GENERATION EXP 5,210,965 5,005,032 205,933
900 555/PURCHASE POWER E10 - - -
901 556/LOAD CONTROL&DISPATCHING EXPENSES D70 - - -
902 Dio 4,863,381 4,671,184 192,197
903 TOTAL OTHER POWER SUPPLY EXPENSES 4,863,381 4,671,184 192,197
904
905 TOTAL PRODUCTION EXPENSES 32,587,528 31,296,609 1,290,919
906
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 120 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
907***TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCA TOR
908
909 TRANSMISSION EXPENSES
910 560/SUPERVISION&ENGINEERING L144 2,317,807 2,226,069 91,738
911 561/LOAD DISPATCHING D12 3,373,689 3,240,363 133,326
912 562/STATION EXPENSES L121 1,900,727 1,825,492 75,235
913 563/OVERHEAD LINE EXPENSES L 127+132+137 483,392 464,255 19,137
914 565/TRANSMISSION OF ELECTRICITY BY OTHERS E10 - - -
915 566/MISCELLANEOUS EXPENSES L 529 - - -
916 567/RENTS L 144 - - -
917 TOTAL TRANSMISSION OPERATION 8,075,615 7,756,179 319,436
918 568/SUPERVISION&ENGINEERING L 144 139,203 133,694 5,510
919 569/STRUCTURES L 116 1,426,838 1,370,442 56,396
920 570/STATION EQUIPMENT L 121 2,616,011 2,512,464 103,547
921 571/OVERHEAD LINES L 127+132+137 972,477 933,977 38,500
922 575 1 OPER TRANS MKT ADMIN-EIM L144 1,155 1,109 46
923 TOTAL TRANSMISSION MAINTENANCE 5,155,684 4,951,686 203,998
924 TOTAL TRANSMISSION EXPENSES 13,231,299 12,707,865 523,434
925
926 DISTRIBUTION EXPENESES
927 580/SUPERVISION&ENGINEERING L 163 3,237,656 3,087,708 149,948
928 581/LOAD DISPATCHING D60 4,740,713 4,565,495 175,218
929 582/STATION EXPENSES L151 1,048,893 1,006,182 42,711
930 5831 OVERHEAD LINE EXPENSES L 153+154 3,701,154 3,437,657 263,497
931584/UNDERGROUND LINE EXPENSES L155+156 1,636,360 1,611,456 24,903
932 585/STREET LIGHTING&SIGNAL SYSTEMS L 161 1,916 1,821 95
933 586/METER EXPENSES L 159 4,739,824 4,594,694 145,129
934 587/CUSTOMER INSTALLATIONS EXPENSE L160 857,913 801,672 56,242
935 588/MISCELLANEOUS EXPENSES L 559 2,979,865 2,820,662 159,203
936 589/RENTS L 163 - - -
937 TOTAL DISTRIBUTION OPERATION 22,944,293 21,927,348 1,016,946
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 121 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
938***TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCA TOR
939
940
941 590/SUPERVISION&ENGINEERING L 163 7,755 7,396 359
942 591/STRUCTURES L 150 - - -
943 592/STATION EQUIPMENT L 151 3,271,354 3,138,143 133,210
9"593/OVERHEAD LINES L 153+154 5,418,492 5,032,733 385,759
945 594/UNDERGROUND LINES L 155+156 311,063 306,329 4,734
946 595/LINE TRANSFORMERS L 157 24,796 23,436 1,360
947 596/STREET LIGHTING&SIGNAL SYSTEMS L 161 93,462 88,810 4,652
948 597/METERS L 159 769,699 746,131 23,568
949 598/MISCELLANEOUS PLANT L163 105,914 101,008 4,905
950 TOTAL DISTRIBUTION MAINTENANCE 10,002,534 9,443,987 558,547
951 TOTAL DISTRIBUTION EXPENSES 32,946,827 31,371,335 1,575,493
952
953 CUSTOMER ACCOUNTING EXPENSES
954 901/SUPERVISION L 959 794,380 759,746 34,634
955 902/METER READING CW902 1,260,207 1,090,088 170,120
956 903/CUSTOMER RECORDS&COLLECTIONS CW903 10,577,395 10,231,412 345,983
957 904/UNCOLLECTIBLE ACCOUNTS CW904 - - -
958 905/MISC EXPENSES L 955-957 - - -
959 TOTAL CUSTOMER ACCOUNTING EXPENSES 12,631,982 12,081,246 550,736
960
961 CUSTOMER SERVICES&INFORMATION EXPENSES
962 907/SUPERVISION L 965 836,042 803,545 32,497
963 908/CUSTOMER ASSISTANCE L 573 5,242,141 5,038,379 203,762
964 909/INFORMATION&INSTRUCTIONAL L 574 - - -
965 910/MISCELLANEOUS EXPENSES L 963+964 384,926 369,964 14,962
966 TOTAL CUST SERV&INFORMATN EXPENSES 6,463,109 6,211,888 251,221
967
968 SALES EXPENSES
969 912/DEMO&SELLING EXPENSES L 579 - - -
970 TOTAL SALES EXPENSES - - -
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 122 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
971 ***TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR**'
972
973 ADMINISTRATIVE&GENERAL EXPENSES
974 920/ADMINISTRATIVE&GENERAL SALARIES PTDCAS 58,534,056 56,026,787 2,507,269
975 921/OFFICE SUPPLIES PTDCAS 403,723 386,430 17,293
976 922/ADMIN&GENERAL EXPENSES TRANSFERRED-CR SUBEX - - -
977 923/OUTSIDE SERVICES PTDCAS - - -
978 924/PROPERTY INSURANCE
979 PRODUCTION-STEAM L 100 - - -
980 ALL RISK&MISCELLANEOUS P710P 426,708 409,500 17,208
981 TOTAL ACCOUNT 924
982
983 925/INJURIES&DAMAGES LABOR 146,518 140,242 6,276
984 926/EMPLOYEE PENSIONS&BENEFITS LABOR - - -
985 927/FRANCHISE REQUIREMENTS CIDA - - -
986 928/REGULATORY COMMISSION EXPENSES
987 FERC ADMIN ASSESSMENTS L179 - - -
988 FERC RATE CASE EXPENSE RESREV - - -
989 SEC EXPENSES L 179 - - -
990 IDAHO PUC-RATE CASE CIDA - - -
991 -OTHER CIDA - - -
992 OREGON PUC-RATE CASE CODA - - -
993 -OTHER CODA - - -
994 TOTAL ACCOUNT 928
995
996 929/DUPLICATE CHARGES SUBEX - - -
997 930.1/GENERAL ADVERTISING RELAB - - -
998 930.2/MISCELLANEOUS EXPENSES PTDCAS 198,088 189,603 8,485
999 931/RENTS L 177 - - -
1000 935/GENERAL PLANT MAINTENANCE P3908 1,228,809 1,176,596 52,212
1001 TOTAL ADMIN&GENERAL EXPENSES 60,937,902 58,329,159 2,608,743
1002 TOTAL OPER&MAINT EXPENSES 158,798,646 151,998,101 6,800,545
1003
1004 TOTAL LABOR-RATIO 1%) 1 1 0
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 123 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1005***TABLE 14-ALLOCATION FACTORS
1006
1007 CAPACITY RELATED KW
1008 PRODUCTION RELATED COINCIDENT PEAKS @ GENERATION LEVE 310 2,563,697 2,462,382 101,315
1009 SYSTEM TRANSMISSION SERVICE @ GENERATION LEVEL 311 2,563,697 2,462,382 101,315
1010 RETAIL TRANSMISSION D12 2,563,697 2,462,382 101,315
1011 DISTRIBUTION SERVICE @ GENERATION LEVEL D60 2,424,088 2,334,493 89,595
1012
1013 ENERGY RELATED MWH
1014 GENERATION LEVEL(PSP) E10 16,435,689 15,742,270 693,419
1015 RETAIL MWH AT GENERATION LVL E100 16,435,689 15,742,270 693,419
1016 CUSTOMER LEVEL E99 15,410,622 14,757,250 653,372
1017
1018 CUSTOMER RELATED FACTORS
1019 369-DIRECT ASSIGNMENT DA369 70,650,589 67,740,904 2,909,686
1020 370-METER INVESTMENT ACCT370 115,905,804 112,356,866 3,548,937
1021 902-CUSTOMER WEIGHTED CW902 2,122,543 1,836,014 286,529
1022 903-CUSTOMER WEIGHTED CW903 16,141,973 15,613,975 527,998
1023 904-CUSTOMER WEIGHTED CW904 3,786,792 3,419,345 367,446
1024 909-DIRECT ASSIGN-AVG.NO.CUST. DA909 624,419 604,506 19,913
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 124 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1025***TABLE 14-ALLOCATION FACTORS
1026
1027 DIRECT ASSIGNMENTS
1028 252-CUSTOMER ADVANCES DA252 32,170,424 32,110,363 60,062
1029 350-LAND&LAND RIGHTS DA350 - - -
1030 352-STRUCTURES&IMPROVEMENTS DA352 658 - 658
1031 353-STATION EQUIPMENT DA353 111,594 75,100 36,494
1032 354-TOWERS&FIXTURES DA354 - - -
1033 355-POLES&FIXTURES DA355 33,842 - 33,842
1034 356-OVERHEAD CONDUCTORS&DEVICES DA356 26,495 1,189 25,306
1035 359-ROADS&TRAILS DA359 - - -
1036 360-LAND&LAND RIGHTS ACCT360 9,024,558 8,641,897 382,661
1037 361-STRUCTURES&IMPROVEMENTS ACCT361 62,286,419 59,574,241 2,712,178
1038 362-STATION EQUIPMENT ACCT362 333,778,528 320,186,976 13,591,552
1039 364-POLES,TOWERS&FIXTURES DA364 333,422,399 307,301,185 26,121,215
1040 365-OVERHEAD CONDUCTORS&DEVICES DA365 161,939,763 152,866,451 9,073,313
1041 366-UNDERGROUND CONDUIT DA366 55,753,674 54,858,172 895,502
1042 367-UNDERGROUND CONDUCTORS&DEVICES DA367 338,826,990 333,716,692 5,110,297
1043 368-LINE TRANSFORMERS ACCT368 750,275,508 709,131,796 41,143,712
1044 371-INSTALLATIONS ON CUSTOMER PREMISES DA371 5,271,974 4,926,363 345,611
1045 373-STREET LIGHTING SYSTEMS DA373 6,798,038 6,459,698 338,340
1046 451-REVENUE-MISCELLANEOUS SERVICE DA451 5,103,805 5,043,528 60,277
1047 454-REVENUE-FACILITIES CHARGE DA454 10,841,971 10,407,743 434,228
1048 908-OTHER CUSTOMER ASSISTANCE DA908 7,567,753 7,274,479 293,274
1049 440-RETAIL SALES REVENUE RETREV 1,283,843,868 ■ 1,230,016,095 53,827,773
1050 447-WHOLESALE SALES REVENUE RESREV - - -
1051 RIDER FUND DIRECT ASSIGNMENT DARIDER - - -
1052 411-BOARDMAN ARO ACCRETION EXP DAACCRETION 12,995 12,485 509
1053 403-BOARDMAN ARO DEPRECIATION EXP DAARO - - -
1054 IDAHO CIDA 1 1 -
1055 OREGON CODA 1 - 1
1056 NET TO GROSS TAX MULTIPLIER DA990 1 1 1
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 125 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1057***TABLE 14-ALLOCATION FACTORS
1058
1059 INTERNALLY DEVELOPED ALLOCATION FACTORS
1060 PLANT-PROD,TRANS&DIST PTO 6,383,232,307 6,112,007,526 271,224,781
1061 LAB-PROD,TRANS,DIST,CUSTACCT&CSIS PTDCAS 97,860,745 93,668,943 4,191,802
1062 PLANT-HYDRO,OTHER,TSUBS,DSUBS&GP P110P 3,040,787,236 2,918,158,498 122,628,738
1063 PLANT-GEN PLT(390,391,397&398) P3908 323,809,073 310,050,362 13,758,710
1064 PLANT-PROD,TRANS,DIST&GEN P101P 6,953,883,405 6,658,411,548 295,471,857
1065 O&M-PROD,TRANS,DIST,CUSTACCT&CSIS SUBEX 739,874,789 706,025,109 33,849,680
1066 LAB-PROD,TRANS,DIST,CUSTACCT&CSIS RELAB 97,860,745 93,668,943 4,191,802
1067 LAB-ALL LABOR WITHOUT925-6"CIRC' LABOR 158,225,421 151,448,360 6,777,061
1068 REV-RETAIL,RESALE&WHEELING FMREV 1,323,721,019 1,268,234,028 55,486,991
1069 O&M-ALL EXCEPT FUEL O&MM 745,935,548 712,456,451 33,479,097
1070 PLANT-89%*HYD PROD+11%*TRANS SURVEY 1,241,099,140 1,192,042,026 49,057,114
1071 O&M-TOTAL(NOT USED) OM401 934,441,471 893,018,187 41,423,284
M. Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 126 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1072***TABLE 15-ALLOCATION FACTORS-RATIOS***
1073
1074 CAPACITY RELATED KW
1075 PRODUCTION RELATED COINCIDENT PEAKS @ GENERATION LEVE D10 100.00% 96.05% 3.95%
1076 SYSTEM TRANSMISSION SERVICE @ GENERATION LEVEL D11 100.00% 96.05% 3.95%
1077 RETAIL TRANSMISSION D12 100.00% 96.05% 3.95%
1078 DISTRIBUTION SERVICE @ GENERATION LEVEL D60 100.00% 96.30% 3.70%
1079
1080 ENERGY RELATED MWH
1081 GENERATION LEVEL(PSP) E10 100.00% 95.78% 4.22%
1082 RETAIL MWH AT GENERATION LVL E100 100.00% 95.78% 4.22%
1083 CUSTOMER LEVEL E99 100.00% 95.76% 4.24%
1084
1085 CUSTOMER RELATED FACTORS
1086 369-DIRECT ASSIGNMENT DA369 100.00% 95.88% 4.12%
1087 370-METER INVESTMENT ACCT370 100.00% 96.94% 3.06%
1088 902-CUSTOMER WEIGHTED CW902 100.00% 86.50% 13.50%
1089 903-CUSTOMER WEIGHTED CW903 100.00% 96.73% 3.27%
1090 904-CUSTOMER WEIGHTED CW904 100.00% 90.30% 9.70%
1091 909-DIRECT ASSIGN-AVG.NO.CUST. DA909 100.00% 96.81% 3.19%
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 127 of 202
Results of Operations Model

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1092***TABLE 15-ALLOCATION FACTORS-RATIOS
1093
1094 DIRECT ASSIGNMENTS
1095 252-CUSTOMER ADVANCES DA252 100.00% 99.81% 0.19%
1096 350-LAND&LAND RIGHTS DA350 #DIV/0I #DIV/0I #DIV/0I
1097 352-STRUCTURES&IMPROVEMENTS DA352 100.00% 0.00% 100.00%
1098 353-STATION EQUIPMENT DA353 100.00% 67.30% 32.70%
1099 354-TOWERS&FIXTURES DA354 #DIV/0I #DIV/0I #DIV/0I
1100 355-POLES&FIXTURES DA355 100.00% 0.00% 100.00%
1101 356-OVERHEAD CONDUCTORS&DEVICES DA356 100.00% 4.49% 95.51%
1102 359-ROADS&TRAILS DA359 #DIV/0I #DIV/0I #DIV/0I
1103 360-LAND&LAND RIGHTS ACCT360 100.00% 95.76% 4.24%
1104 361-STRUCTURES&IMPROVEMENTS ACCT361 100.00% 95.65% 4.35%
1105 362-STATION EQUIPMENT ACCT362 100.00% 95.93% 4.07%
1106 364-POLES,TOWERS&FIXTURES DA364 100.00% 92.17% 7.83%
1107 365-OVERHEAD CONDUCTORS&DEVICES DA365 100.00% 94.40% 5.60%
1108 366-UNDERGROUND CONDUIT DA366 100.00% 98.39% 1.61%
1109 367-UNDERGROUND CONDUCTORS&DEVICES DA367 100.00% 98.49% 1.51%
1110 368-LINE TRANSFORMERS ACCT368 100.00% 94.52% 5.48%
1111 371-INSTALLATIONS ON CUSTOMER PREMISES DA371 100.00% 93.44% 6.56%
1112 373-STREET LIGHTING SYSTEMS DA373 100.00% 95.02% 4.98%
1113 451-REVENUE-MISCELLANEOUS SERVICE DA451 100.00% 98.82% 1.18%
1114 454-REVENUE-FACILITIES CHARGE DA454 100.00% 95.99% 4.01%
1115 908-OTHER CUSTOMER ASSISTANCE DA908 100.00% 96.12% 3.88%
1116 440-RETAIL SALES REVENUE RETREV 100.00% 95.81% 4.19%
1117 447-WHOLESALE SALES REVENUE RESREV #DIV/0I #DIV/0I #DIV/0I
1118 IDAHO CIDA 100.00% 100.00% 0.00%
1119 OREGON CODA 100.00% 0.00% 100.00%
1120 NET TO GROSS TAX MULTIPLIER DA990 1.347 1.347 1.347
M.Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 128 of 202
Results of Operations Model

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1121 -TABLE*TABLE 15-ALLOCATION FACTORS-RATIOS
1122
1123 INTERNALLY DEVELOPED ALLOCATION FACTORS
1124 PLANT-PROD,TRANS&DIST PTD 100.00% 95.75% 4.25%
1125 LAB-PROD,TRANS,DIST,CUST ACCT&CSIS PTDCAS 100.00% 95.72% 4.28%
1126 PLANT-HYDRO,OTHER,TSUBS,DSUBS&GP P110P 100.00% 95.97% 4.03%
1127 PLANT-GEN PLT(390,391,397&398) P3908 100.00% 95.75% 4.25%
1128 PLANT-PROD,TRANS,DIST&GEN P101P 100.00% 95.75% 4.25%
1129 O&M-PROD,TRANS,DIST,CUSTACCT&CSIS SUBEX 100.00% 95.42% 4.58%
1130 LAB-PROD,TRANS,DIST,CUST ACCT&CSIS RELAB 100.00% 95.72% 4.28%
1131 LAB-ALL LABOR WITHOUT 925-6"CIRC' LABOR 100.00% 95.72% 4.28%
1132 REV-RETAIL,RESALE&WHEELING FMREV 100.00% 95.81% 4.19%
1133 O&M-ALL EXCEPT FUEL O&M M 100.00% 95.51% 4.49%
1134 PLANT-89%*HYD PROD+11%*TRANS SURVEY 100.00% 96.05% 3.95%
1135 O&M-TOTAL(NOT USED) OM401 100.00% 95.57% 4.43%
M. Larkin Workpaper
Case No. IPC-E-24-07
2024 Increment Page 129 of 202
Results of Operations Model

IMPLIED COST OF CAPITAL
2024 Increment
APPROVED EMBEDDED WEIGHTED
Approved Cost of Capital -2023 ID GRC STRUCTURE COST COST
Long Term Debt 50.00% 4.89% 2.45%
Preferred Stock 0.00% 0.00% 0.00%
Common Equity 50.00% 6.70% 3.35%
Total 100.00% 5.80%
2023 GRC Approved ROE 9.60%
Difference -2.90%
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 130 of 202
Results of Operations Model

Bridger and Valmy are Removed from the 2023 Base - Column D on JSS - PF Tab
Bridger Adjustments Valmy Adjustments
Table 1 Table 1
EPIS 13-mo avg EPIS 13-mo avg
310-316 $ 474,338,208 310-316 $ 256,926,646
352 $ 140,406 352 $ 380,258
353 $ 4,471,709 353 $ 4,287,794
Table 2 13-mo avg Table 2 13-mo avg
Accum Depr Accum Depr
310-316 $ 332,389,413 310-316 $ 214,055,101
352 $ 108,981 352 $ 350,555
353 $ 1,818,043 353 $ 3,630,206
Table 4 12/31/2023 Total Table 4 12/31/2023 Total
Revenue Revenue
Bridger $ 47,794,440 Valmy $ 29,898,422
Table 5 12/31/2023 Total Table 5 12/31/2023 Total
O&M O&M
500 $ 268,861 500 $ 514,428
502 $ 6,103,197 502 $ 4,049,014
505 $ - 505 $ 1,589,402
506 $ 6,576,575 506 $ 1,552,020
507 $ 233,996 507 $ -
510 $ 17,707 510 $ -
511 $ - 511 $ 1,142,007
512 $ 5,527,262 512 $ 2,169,915
513 $ 2,464,174 513 $ 555,201
514 $ 8,576,992 514 $ 269,361
Table 6 12/31/2023 Total Table 6 12/31/2023 Total
Depr Exp Depr Exp
310-316 $ 19,476,994 310-316 $ 20,537,138
352 $ 2,631 352 $ 14,906
353 $ 225,812 353 $ 311,294
SEE BRIDGER&VALMY TAX CALCS TAB FOR TAX INPUTS
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 131 of 202
Results of Operations Model

Boardman Plant Removal
Table 1
EPIS
310-316 $ 106,610
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 132 of 202
Results of Operations Model

Idaho Power Company
Total System
Estimate of income tax items for regulatory purposes
12/31/2023
Valmy2 Bridger Coal Total
Accumulated Deferred Income Taxes:
Acct 282xxx,12-31-22 (4,697,287) (4,853,504) (9,563,489)
2023 Activity 3,178,414 1,634,638 4,813,052
Acct 282xxx,12-31-23 (1,518,873) (3,218,866) (4,750,437)
Average ' (3,108,080) (4,036,185) (7,156,963)Cr balance Reduce total system 282 ADIT by this amount
Deferred Income Tax Expense(Benefit): (3,178,414) (1,634,638) (4,813,052)Cr balance If total system net deferred tax expense is a Dr,then increase the expense
If a Cr,then reduce the benefit
Current Income Tax Expense(Benefit):
Book/Tax Differences-Income or(Deduction):
Depreciation 12,186,204 36,634,057 48,820,261
Tax Basis Items
Net Differences 12,186,204 36,634,057 48,820,261 Addback If total system net tax adjustments are an add-back,decrease the add-back
If a deduction,then increase the deduction
State Taxes-
Idaho 651,938 1,650,114 2,302,051
Oregon 36,612 107,574 144,187
Other 12,186 36,634 48,820
Current State Taxes 1,794,322 2,495,058 Dr With difference removed,total system current tax expense should decrease by this
Federal-
Net Differences 12,186,204 36,634,057 48,820,261
State Tax Deduction (700,736) (1,794,322) (2,495,058)
Taxable Income or(Loss) 11,485,468 34,839,735 46,325,203
Current Federal Tax 2,411,948 7,316,344 9,728,293 Dr With difference removed,total system current tax expense should decrease by this
Net Tax Expense for Flow-Thru 1 (65,730)1 7,476,028 1 7,410,299
Proof-Tax Rate Reconciliation:
Book Loss(book depreciation expense) (13,378,366) (48,648,307) (62,026,673)
Statutory Taxes (3,443,591) (12,522,074) (15,965,666)
Originating Flow-Thru - - -
Reversing Flow-Thru 629,122 7,382,219 8,011,341
EDIT Amortization (1,220,810) (1,322,116) (2,542,926)
Deferred Tax Rate Differential 550,003 1,734,865 2,284,868
ID&OR Bonus Depreciation (24,046) (318,940) (342,986)
Total Flow-Thru 1 (65,730)1 7,476,028 1 7,410,298
Net Tax Expense(Benefit) (3,509,322) (5,046,046) (8,555,368)
M.Larkin Workpaper
Case No. IPC-E-24-07
Willmore\RegAdmin\2024 Idaho General Rate Case\Workpapers\Larkin\LARKIN Workpaper 6-IR@�Mjygq rations Model.xlsxBridger&Valmy Tax Calcs Page 133 of 202
Results of Operations Model

M. Larkin Workpaper
Case No. IPC-E-24-07
Internal Use Only Page 134 of 202
Results of Operations Model

M. Larkin Workpaper
Case No. IPC-E-24-07
Internal Use Only Page 135 of 202
Results of Operations Model

IDAHO POWER COMPANY
SUMMARY OF PROFORMED NORMALIZED REVENUES
IDAHO JURISDICTION
BY MONTH BY RATE
12 MONTHS ENDING DECEMBER 31,2023
Tariff Description January February March April May June
1-Residential Serv. 55,094,867 50,504,326 45,886,869 37,927,461 32,383,040 34,382,410
3-Residential Master Meter 57,395 50,783 44,661 37,327 30,129 24,373
4-Residential Energy Watch 0 0 0 0 0 0
5-Residential TOD 167,205 151,213 136,730 116,220 102,103 107,492
6-Residential On-Site Generation 1,337,521 1,099,709 846,409 554,652 268,379 250,437
7-Small General Serv. 1,618,377 1,513,303 1,389,933 1,197,343 1,122,219 1,159,481
8-Small General Serv.On-Site Generation 3,993 3,569 2,763 1,872 879 716
9-Large General Serv. 22,018,903 21,556,228 20,737,048 19,497,634 19,941,650 21,512,371
84L-Large General Serv.On-Site Generation 149,518 145,759 132,137 115,133 103,449 112,340
15-Dusk/Dawn Lighting 48,668 48,488 48,946 48,890 48,945 48,978
16-Dusk/Dawn Lighting 57,485 56,199 56,622 56,142 56,767 56,299
19-Uniform Rate Cont. 9,494,508 9,666,557 8,899,225 9,517,018 8,461,339 8,837,151
841-Industrial On-Site Generation 70,017 67,598 59,607 62,443 55,623 53,382
24-Irrigation&Pump. 288,805 293,132 250,876 1,300,531 9,163,535 21,889,293
84A-Irrigation&Pump On-Site Generation 4,962 5,391 751 1,055 9,003 373,108
40-Unmetered Gen.Serv. 98,443 98,467 98,468 98,391 98,387 98,402
41-Municipal St.Light. 288,043 285,541 283,134 276,625 279,434 275,785
42-Traffic Control Light. 15,301 14,808 14,563 13,231 14,947 14,099
Total Idaho Rates 90,814,012 85,561,072 78,888,740 70,821,968 72,139,827 89,196,113
Special Contracts
26-Micron 2,302,531 2,172,325 2,328,560 2,306,995 2,367,813 2,058,920
29-J R Simplot 700,491 659,726 697,455 665,717 623,379 644,680
30-DOE 988,312 930,454 903,880 810,966 699,758 611,283
32-J R Simplot-Caldwell 0 0 0 595,072 628,336 612,283
Total Specials 3,991,334 3,762,505 3,929,894 4,378,750 4,319,286 3,927,166
Total Idaho Firm Sales 94,805,346 89,323,577 82,818,635 75,200,718 76,459,113 93,123,279
M.Larkin Workpaper
Case No. IPC-E-24-07
.Internal Use Only Page 136 of 202
Results of Operations Model

IDAHO POWER COMPANY
SUMMARY OF PROFORMED NORMALIZED REVENUES
IDAHO JURISDICTION
BY MONTH BY RATE
12 MONTHS ENDING DECEMBER 31,2023
Tariff Description July August September October November December Total
1-Residential Serv. 43,386,759 52,466,184 42,206,660 31,275,301 35,112,032 46,569,735 507,195,644
3-Residential Master Meter 28,741 35,362 31,241 25,226 31,039 44,010 440,287
4-Residential Energy Watch 0 0 0 0 0 0 0
5-Residential TOD 129,813 156,429 129,961 99,816 107,071 140,314 1,544,367
6-Residential On-Site Generation 354,211 568,896 498,146 335,912 488,368 963,307 7,565,946
7-Small General Serv. 1,318,566 1,503,510 1,338,009 1,135,714 1,150,167 1,383,344 15,829,966
8-Small General Serv.On-Site Generation 1,126 1,513 1,206 977 1,177 2,125 21,916
9-Large General Serv. 24,548,860 26,447,283 24,874,593 21,226,763 20,572,700 21,466,173 264,400,205
84L-Large General Serv.On-Site Generation 125,463 139,103 138,863 128,424 135,925 162,504 1,588,618
15-Dusk/Dawn Lighting 48,726 48,834 48,735 48,572 48,775 48,789 585,347
16-Dusk/Dawn Lighting 56,333 56,183 56,464 56,306 56,033 56,564 677,398
19-Uniform Rate Cont. 10,672,485 11,131,162 11,703,755 9,254,160 9,400,769 9,039,542 116,077,671
841-Industrial On-Site Generation 75,621 94,175 92,544 66,112 57,863 58,088 813,073
24-Irrigation&Pump. 32,529,989 31,114,909 25,896,582 8,826,978 1,377,142 348,508 133,280,280
84A-Irrigation&Pump On-Site Generation 707,931 690,822 508,199 291,065 15,498 4,630 2,612,413
40-Unmetered Gen.Serv. 98,449 98,451 96,880 100,317 98,308 98,673 1,181,637
41-Municipal St.Light. 274,421 275,260 278,718 280,709 282,989 286,150 3,366,807
42-Traffic Control Light. 13,937 13,245 15,267 14,417 14,592 15,081 173,490
Total Idaho Rates 114,371,433 124,841,322 107,915,823 73,166,768 68,950,450 80,687,537 1,057,355,064
Special Contracts
26-Micron 2,064,460 2,135,604 2,061,879 2,139,778 2,133,566 2,233,048 26,305,479
29-J R Simplot 672,489 680,527 612,482 679,745 668,962 689,676 7,995,328
30-DOE 589,707 636,361 608,948 644,471 744,924 807,831 8,976,893
32-J R Simplot-Caldwell 555,788 644,898 604,243 613,397 548,010 552,929 5,354,957
Total Specials 3,882,444 4,097,390 3,887,551 4,077,390 4,095,462 4,283,484 48,632,656
Total Idaho Firm Sales 118,253,876 128,938,712 111,803,374 77,244,158 73,045,912 84,971,021 , 1,105,987,721
M.Larkin Workpaper
Case No. IPC-E-24-07
.Internal Use Only Page 137 of 202
Results of Operations Model

IDAHO POWER COMPANY
SUMMARY OF PROFORMED NORMALIZED REVENUES
STATE OF OREGON
BY MONTH BY RATE
12 MONTHS ENDING DECEMBER 31,2023
Tariff Description January February March April May June
01-Residential Serv. 2,417,617 2,162,639 1,882,358 1,492,187 1,203,394 1,103,785
84R-Residential Net Metering 13,898 12,030 10,680 6,360 2,968 2,905
05-Residential TOD 1,305 1,249 976 809 609 689
07-Small General Serv. 213,549 193,171 175,287 155,393 140,797 137,450
84C-Small General Serv.Net Metering 170 154 333 373 271 137
09-Large General Serv. 1,020,180 909,726 889,628 798,233 734,962 773,367
84L-Large General Serv.Net Metering 8,308 7,708 6,883 6,233 5,774 5,859
15-Dusk/Dawn Lighting 4,324 4,326 4,316 4,293 4,297 4,280
16-Dusk/Dawn Lighting 4,755 4,813 4,791 4,383 4,793 4,808
19-Uniform Rate Cont. 1,369,512 1,298,814 910,254 1,243,390 1,359,901 1,400,124
24-Irrigation Service 22,723 21,917 19,867 20,820 255,328 1,172,097
84A-Irrigation&Pump Net Metering 54 57 57 60 60 8,035
40-Unmetered Gen.Serv. 33 33 33 33 33 33
41-Municipal St.Light. 12,386 12,381 12,302 12,169 12,151 12,109
42-Traffic Control Light. 197 195 181 175 210 169
Total Oregon Firm Sales 5,089,011 4,629,214 3,917,945 3,744,911 3,725,547 4,625,847
M.Larkin Workpaper
Case No. IPC-E-24-07
.Internal Use Only Page 138 of 202
Results of Operations Model

IDAHO POWER COMPANY
SUMMARY OF PROFORMED NORMALIZED REVENUES
STATE OF OREGON
BY MONTH BY RATE
12 MONTHS ENDING DECEMBER 31,2023
Tariff Description July August September October November December Total
01-Residential Serv. 1,197,886 1,472,458 1,242,526 1,011,840 1,322,244 1,931,773 18,440,708
84R-Residential Net Metering 3,851 6,005 5,629 4,417 7,316 15,296 91,355
05-Residential TOD 1,068 1,255 928 545 618 1,102 11,152
07-Small General Serv. 162,844 193,222 166,130 146,597 172,533 199,454 2,056,427
84C-Small General Serv.Net Metering 183 418 221 170 169 185 2,782
09-Large General Serv. 856,666 917,539 901,536 862,391 958,725 983,443 10,606,395
84L-Large General Serv.Net Metering 6,276 7,676 7,411 5,447 5,583 6,468 79,626
15-Dusk/Dawn Lighting 4,288 4,280 4,294 4,287 4,300 4,299 51,584
16-Dusk/Dawn Lighting 4,825 4,842 4,811 4,814 4,810 4,816 57,260
19-Uniform Rate Cont. 1,196,436 1,473,010 1,498,525 1,244,657 1,317,037 1,315,644 15,627,304
24-Irrigation Service 1,655,089 1,832,948 1,356,181 296,884 44,240 20,484 6,718,578
84A-Irrigation&Pump Net Metering 10,495 11,297 10,002 2,224 60 60 42,463
40-Unmetered Gen.Serv. 33 33 33 33 33 33 392
41-Municipal St.Light. 12,063 12,094 12,122 12,193 12,229 12,309 146,508
42-Traffic Control Light. 174 173 172 168 196 180 2,189
Total Oregon Firm Sales 5,112,178 5,937,249 5,210,519 3,596,665 3,850,093 4,495,546 53,934,723
M.Larkin Workpaper
Case No. IPC-E-24-07
.Internal Use Only Page 139 of 202
Results of Operations Model

IDAHO POWER COMPANY
SUMMARY OF PROFORMED NORMALIZED REVENUES
TOTAL COMPANY
BY MONTH BY RATE
12 MONTHS ENDING DECEMBER 31,2023
Tariff Description January February March April May June
1-Residential Serv. 57,512,485 52,666,965 47,769,227 39,419,648 33,586,434 35,486,194
3-Residential Master Meter 57,395 50,783 44,661 37,327 30,129 24,373
4-Residential Energy Watch 0 0 0 0 0 0
5-Residential TOD 168,510 152,462 137,706 117,028 102,712 108,181
6/84R-Residential On-Site Generation 1,351,419 1,111,739 857,090 561,012 271,346 253,341
7-Small General Serv. 1,831,926 1,706,474 1,565,220 1,352,736 1,263,016 1,296,931
8/84C-Small General Serv.On-Site Generation 4,164 3,723 3,095 2,246 1,150 852
9-Large General Serv. 23,039,083 22,465,954 21,626,675 20,295,867 20,676,612 22,285,738
84L-Large General Serv.On-Site Generation 157,826 153,468 139,020 121,366 109,222 118,199
15-Dusk/Dawn Lighting 52,992 52,814 53,262 53,183 53,242 53,258
16-Dusk/Dawn Lighting 62,241 61,011 61,413 60,525 61,560 61,107
19-Uniform Rate Cont. 10,864,020 10,965,371 9,809,480 10,760,408 9,821,240 10,237,275
841-Industrial On-Site Generation 70,017 67,598 59,607 62,443 55,623 53,382
24-Irrigation&Pump. 311,528 315,050 270,742 1,321,351 9,418,863 23,061,390
84A-Irrigation&Pump On-Site Generation 5,016 5,448 808 1,115 9,063 381,143
40-Unmetered Gen.Serv. 98,476 98,500 98,501 98,424 98,420 98,434
41-Municipal St.Light. 300,428 297,922 295,435 288,793 291,585 287,894
42-Traffic Control Light. 15,498 15,003 14,744 13,406 15,157 14,267
Total All Rates 95,903,023 90,190,285 82,806,685 74,566,879 75,865,374 93,821,960
Special Contracts
26-Micron 2,302,531 2,172,325 2,328,560 2,306,995 2,367,813 2,058,920
29-J R Simplot 700,491 659,726 697,455 665,717 623,379 644,680
30-DOE 988,312 930,454 903,880 810,966 699,758 611,283
32-J R Simplot-Caldwell 0 0 0 595,072 628,336 612,283
Total Specials 3,991,334 3,762,505 3,929,894 4,378,750 4,319,286 3,927,166
Total Firm Retail Sales 99,894,357 93,952,790 86,736,580 78,945,629 80,184,660 97,749,126
M.Larkin Workpaper
Case No. IPC-E-24-07
.Internal Use Only Page 140 of 202
Results of Operations Model

IDAHO POWER COMPANY
SUMMARY OF PROFORMED NORMALIZED REVENUES
TOTAL COMPANY
BY MONTH BY RATE
12 MONTHS ENDING DECEMBER 31,2023
Tariff Description July August September October November December Total
1-Residential Serv. 44,584,646 53,938,643 43,449,186 32,287,140 36,434,276 48,501,507 525,636,352
3-Residential Master Meter 28,741 35,362 31,241 25,226 31,039 44,010 440,287
4-Residential Energy Watch 0 0 0 0 0 0 0
5-Residential TOD 130,881 157,683 130,889 100,361 107,690 141,416 1,555,519
6/84R-Residential On-Site Generation 358,062 574,900 503,775 340,329 495,684 978,603 7,657,301
7-Small General Serv. 1,481,410 1,696,732 1,504,138 1,282,311 1,322,700 1,582,798 17,886,393
8/84C-Small General Serv.On-Site Generation 1,309 1,931 1,426 1,147 1,346 2,309 24,698
9-Large General Serv. 25,405,526 27,364,821 25,776,129 22,089,154 21,531,425 22,449,616 275,006,600
84L-Large General Serv.On-Site Generation 131,740 146,778 146,275 133,870 141,508 168,972 1,668,244
15-Dusk/Dawn Lighting 53,014 53,115 53,028 52,859 53,075 53,088 636,931
16-Dusk/Dawn Lighting 61,158 61,024 61,275 61,120 60,843 61,380 734,658
19-Uniform Rate Cont. 11,868,921 12,604,173 13,202,280 10,498,817 10,717,806 10,355,186 131,704,976
841-Industrial On-Site Generation 75,621 94,175 92,544 66,112 57,863 58,088 813,073
24-Irrigation&Pump. 34,185,079 32,947,857 27,252,763 9,123,862 1,421,382 368,992 139,998,858
84A-Irrigation&Pump On-Site Generation 718,426 702,119 518,202 293,289 15,558 4,690 2,654,876
40-Unmetered Gen.Serv. 98,482 98,484 96,913 100,349 98,341 98,706 1,182,029
41-Municipal St.Light. 286,484 287,354 290,839 292,902 295,218 298,459 3,513,315
42-Traffic Control Light. 14,111 13,418 15,439 14,585 14,788 15,261 175,679
Total All Rates 119,483,611 130,778,570 113,126,342 76,763,432 72,800,543 85,183,082 1,111,289,787
Special Contracts
26-Micron 2,064,460 2,135,604 2,061,879 2,139,778 2,133,566 2,233,048 26,305,479
29-J R Simplot 672,489 680,527 612,482 679,745 668,962 689,676 7,995,328
30-DOE 589,707 636,361 608,948 644,471 744,924 807,831 8,976,893
32-J R Simplot-Caldwell 555,788 644,898 604,243 613,397 548,010 552,929 5,354,957
Total Specials 3,882,444 4,097,390 3,887,551 4,077,390 4,095,462 4,283,484 48,632,656
Total Firm Retail Sales 123,366,054 134,875,960 117,013,893 80,840,822 76,896,005 89,466,567 1,159,922,444
M.Larkin Workpaper
Case No. IPC-E-24-07
.Internal Use Only Page 141 of 202
Results of Operations Model

Revenues Subiect to SBA- Column G on JSS- PF Tab
12013 Idaho Base-Level NPSE Sales 13,498,892
2023 Normalized kWh Sales 14,730,551
Difference 1,231,659
2015 SBAR $ 26.72
Revenues subject to the Sales Base Adjustment $ 32,909,930
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 142 of 202
Results of Operations Model

2013 Base NPSE
System
Langley 2013
Approved
Account 501,Coal $ 167,192,744 $ 108,503,180
Account 536,Water for Power $ 1,828,640 $ 2,380,597
Account 547,Gas $ 51,934,201 $ 33,367,563
Account 555,Non-PURPA $ 45,510,093 $ 62,606,593
Account 565,Transmission $ 8,262,000 $ 5,455,955
Account 447,Surplus Sales $ (124,916,153) $ (51,735,153)
Account 442,Hoku Revenues $ (23,921,466) $ -
Net 95%Accounts $ 125,890,059 $ 160,578,735
Account 555,PURPA $ 62,851,454 $ 133,853,869
Account 555,DR Incentives $ 11,252,265 $ 11,252,265
Total $ 199,993,778 $ 305,684,869
$ 357,420,021 w/o Surplus Sales
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 143 of 202
Results of Operations Model

Annualizing Accumulated Depreciation and Depreciation Expense-Column E on JSS-PF Tab
IDAHO POWER COMPANY
DEPRECIATION EXPENSE
FOR THE TWELVE MONTHS ENDED DECEMBER 31,2023
ACTUAL TOTAL DEPR EXPENSE ACCUM DEPR
DEPR EXP ANNUALIZED DEPRECIATION ANNUALIZING ANNUALIZING
DESCRIPTION DEC 2023 DEPR EXPENSE 2023 ADJUSTMENTS ADJUSTMENTS
PRODUCTION PLANT
Steam Production-Accounts 310-316 779,092 9,349,110 8,996,341.11 352,768 176,384
Hydro Production-Accounts 330-336 2,202,327 26,427,920 25,320,108.53 1,107,811 553,906
Other Production-Accounts 340-346 1,564,300 18,771,603 19,314,018.32 54( 2.416) 27( 1.208)
*TOTAL PRODUCTION PLANT 4,545,719 54,548,632 53,630,468 918,164 459,082
TRANSMISSION PLANT
Account 350 34,769 417,228 415,829.52 1,398 699
Account 352 167,176 2,006,107 1,937,154.72 68,953 34,476
Account 353 871,116 10,453,388 10,218,625.16 234,763 117,381
Account 354 232,563 2,790,758 2,792,926.96 (2,169) (1,085)
Account 355 518,405 6,220,865 6,050,395.37 170,470 85,235
Account 356 334,084 4,009,003 4,005,706.45 3,296 1,648
Account 359 224 2 693 2,692.84 0 0
*TOTAL TRANSMISSION PLANT 2,158,337 25,900,042 25,423,331 476,711 238,355
DISTRIBUTION PLANT
Account 360 2,424.22 29,091 29,090.09 1 0
Account 361 116,165.04 1,393,980 1,326,156.77 67,824 33,912
Account 362 533,736.77 6,404,841 6,333,752.59 71,089 35,544
Account 363 454,365.32 5,452,384 2,244,321.74 3,208,062 1,604,031
Account 364 524,259.37 6,291,112 6,442,765.12 (151,653) (75,826)
Account365 298,569.52 3,582,834 3,587,925.38 (5,091) (2,546)
Account 366 108,035.82 1,296,430 1,306,133.57 (9,704) (4,852)
Account 367 649,340.67 7,792,088 7,626,874.75 165,213 82,607
Account 368 1,209,568.40 14,514,821 14,291,907.73 222,913 111,457
Account 369 98,794.75 1,185,537 1,167,405.11 18,132 9,066
Account 370 488,199.64 5,858,396 5,727,122.15 131,274 65,637
Account 371 20,009.34 240,112 217,332.81 22,779 11,390
Account 373 19,374.05 232,489 224,904.66 7 584 3 792
*TOTAL DISTRIBUTION PLANT 4,522,843 54,274,115 50,525,692 3,748,422 1,874,211
GENERALPLANT
Account 390 300,390.37 3,604,684 3,293,855.19 310,829 155,415
Account 391 553,625.70 6,643,508 6,891,212.22 (247,704) (123,852)
Account 392 6,037.00 72,444 72,443.89 0 0
Account 393 19,225.28 230,703 220,416.72 10,287 5,143
Account 394 67,648.54 811,782 795,511.33 16,271 8,136
Account 395 70,892.28 850,707 819,640.63 31,067 15,533
Account 396 0.00 0 0.00 0 0
Account 397 460,918.29 5,531,019 5,401,103.11 129,916 64,958
Account 398 64,554.78 774,657 798,192.98 (23,536) (11,768)
*TOTAL GENERAL PLANT 1,543,292 18,519,507 18,292,376 227,131 113,565
DEPR BEFORE DISALLOWED COSTS 12,770,191 153,242,295 147,871,868 5,370,428 2,685,214
Depr On Disallowed Accounts (24,692) (296,299) (296,299) 0 0
Depr On Idaho ARO 0 0 0 0 0
***TOTAL DEPRECIATION 12,745,499.68 152,945,996 147,575,568.20 5,370,428 2,685,214
M.Larkin Workpaper
LARKIN Workpaper 6-Results of Operations Model.xlsx.jeb 5/30/2024 Case No. IPC-E-24-07
Page 144 of 202
Results of Operations Model

Annualizing Accumulated Amortization and Amortization Expense- Column E on JSS- PF Tab
IDAHO POWER COMPANY
AMORTIZATION EXPENSE
FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2023
ACTUAL AMORT EXPENSE ACCUM AMORT
AMORT EXP ANNUALIZED AMORTIZATION ANNUALIZING ANNUALIZING
DESCRIPTION DEC 2023 AMORT EXPENSE 2023 ADJUSTMENTS ADJUSTMENTS
Account 404
#302 122,678 1,472,131 1,435,591 36,539 18,270
#303 433,079 5,196,943 4,758,364 438,580 219,290
---------- ---------- ---------- ---------- ----------
SUBTOTAL 555,756 6,669,074 6,193,955 475,119 237,560
Account 406 15,018
Account 411.6 0
Account 411.7 0
Account 411.8 -769,099 769,099
---------- ----------
SUBTOTAL -754,081 769,099
GRAND TOTAL 555,756 6,669,074 5,439,874 1,244,218
M. Larkin Workpaper
LARKIN Workpaper 6-Results of Operations Model.xlsx.jcb Case No. IPC-E-24-07
Page 145 of 202
Results of Operations Model

IDAHO POWER COMPANY
INCREMENTAL REVENUE ASSOCIATED WITH LOAD GROWTH
2023 ID kWh Sales
14,907,835,244
Mill Rate (Rate Base and Labor Only Rev Reg/Sales)
0.0440775
Incremental 2024 ID kWh Sales
124,724,470
Incremental 2024 Revenues
$ 5,497,548
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 1 of 37
Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
1
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
4 SUMMARY OF RESULTS
5 RATE OF RETURN UNDER PRESENT RATES
6 TOTAL COMBINED RATE BASE 3,814,724,493 3,648,879,611 165,844,882
7
8 OPERATING REVENUES
9 FIRM JURISDICTIONAL SALES 0 0 0
10 SYSTEM OPPORTUNITY SALES 0 0 0
11 OTHER OPERATING REVENUES 0 0 0
12 TOTAL OPERATING REVENUES 0 0 0
13 OPERATING EXPENSES
14 OPERATION&MAINTENANCE EXPENSES 229,857,514 221,465,558 8,391,956
15 DEPRECIATION EXPENSE 157,725,966 150,906,642 6,819,324
16 AMORTIZATION OF LIMITED TERM PLANT 5,981,316 5,724,796 256,520
17 TAXES OTHER THAN INCOME 0 0 0
18 REGULATORY DEBITS/CREDITS 0 0 0
19 PROVISION FOR DEFERRED INCOME TAXES (17,873,223) (17,099,076) (774,147)
20 INVESTMENT TAX CREDIT ADJUSTMENT 25,014,178 23,923,064 1,091,114
21 FEDERAL INCOME TAXES (104,708,343) (100,471,089) (4,237,254)
22 STATE INCOME TAXES (47,188,876) (45,230,974) (1,957,902)
23 TOTAL OPERATING EXPENSES 248,808,533 239,218,920 9,589,612
24 OPERATING INCOME (248,808,533) (239,218,920) (9,589,612)
25 ADD: IERCO OPERATING INCOME 0 0 0
26 CONSOLIDATED OPERATING INCOME (248,808,533) (239,218,920) (9,589,612)
27 RATE OF RETURN UNDER PRESENT RATES -6.52% -6.56% -5.78%
28
29 DEVELOPMENT OF REVENUE REQUIREMENTS
30 RATE OF RETURN 7.247% 7.247% 7.247%
31
32 RETURN 276,469,471 264,449,980 12,019,491
33 EARNINGS DEFICIENCY 525,278,003 503,668,900 21,609,103
34 ADD:CWIP (HELLS CANYON RELICENSING) D10 0 0 0
35 EARNINGS DEFICIENCY WITH CWIP 525,278,003 503,668,900 21,609,103
36
37 NET-TO-GROSS TAX MULTIPLIER 1.347 1.347 1.347
38 REVENUE DEFICIENCY 707,349,865 678,250,614 29,099,250 2023 ID kWh Sales
39 14,907,835,244
40 ADD:VALMY REVENUE REQUIREMENT CIDA 36,957,501 0 0
41 ADD:BRIDGER REVENUE REQUIREMENT CIDA 67,579,174 0 0 Mill Rate(Rev Reg/Sak
42 LESS:BATTERY ADITC MITIGATION CIDA 21,149,854 21,149,854 0 0.0440775
43 REVENUE DEFICIENCY WITH VALMY AND BRIDGER 790,736,685 657,100,760 29,099,250
44 Incremental 2024 ID kV
45 FIRM JURISDICTIONAL RETAIL REVENUES 0 0 0 124,724,470
46 PERCENT INCREASE REQUIRED
47 Incremental 2024 Reve
48 SALES AND WHEELING REVENUES REQUIRED 686,200,010 657,100,760 29,099,250 $ 5,497,548
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 2 of 37
2 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
49 SUMMARY OF RESULTS
50 DEVELOPMENT OF RATE BASE COMPONENTS
51 ELECTRIC PLANT IN SERVICE
52 INTANGIBLE PLANT 105,220,910 100,780,103 4,440,807
53 PRODUCTION PLANT 1,992,528,797 1,911,246,209 81,282,589
54 TRANSMISSION PLANT 1,355,473,916 1,300,089,883 55,384,033
55 DISTRIBUTION PLANT 2,360,673,832 2,248,329,066 112,344,765
56 GENERAL PLANT 509,926,287 487,683,399 22,242,888
57 TOTAL ELECTRIC PLANT IN SERVICE 6,323,823,741 6,048,128,660 275,695,082
58 LESS:ACCUM PROVISION FOR DEPRECIATION 2,085,671,484 1,994,330,534 91,340,950
59 AMORT OF OTHER UTILITY PLANT 41,915,507 40,140,230 1,775,277
60 NET ELECTRIC PLANT IN SERVICE 4,196,236,751 4,013,657,896 182,578,855
61 LESS:CUSTOMER ADV FOR CONSTRUCTION 0 0 0
62 LESS:ACCUM DEFERRED INCOME TAXES 382,140,505 365,406,532 16,733,973
63 ADD:PLT HLD FOR FUTURE+ACQUIS ADJ 628,247 628,247 0
64 ADD:WORKING CAPITAL 0 0 0
65 ADD:CONSERVATION+OTHER DFRD FROG. 0 0 0
66 ADD:SUBSIDIARY RATE BASE 0 0 0
67 TOTAL COMBINED RATE BASE 3,814,724,493 3,648,879,611 165,844,882
68
69 DEVELOPMENT OF NET INCOME COMPONENTS
70 OPERATING REVENUES
71 SALES REVENUES 0 0 0
72 OTHER OPERATING REVENUES 0 0 0
73 TOTAL OPERATING REVENUES 0 0 0
74 OPERATING EXPENSES
75 OPERATION&MAINTENANCE EXPENSES 229,857,514 221,465,558 8,391,956
76 DEPRECIATION EXPENSE 157,725,966 150,906,642 6,819,324
77 AMORTIZATION OF LIMITED TERM PLANT 5,981,316 5,724,796 256,520
78 TAXES OTHER THAN INCOME 0 0 0
79 REGULATORY DEBITS/CREDITS 0 0 0
80 PROVISION FOR DEFERRED INCOME TAXES (17,873,223) (17,099,076) (774,147)
81 INVESTMENT TAX CREDIT ADJUSTMENT 25,014,178 23,923,064 1,091,114
82 FEDERAL INCOME TAXES (104,708,343) (100,471,089) (4,237,254)
83 STATE INCOME TAXES (47,188,876) (45,230,974) (1,957,902)
84 TOTAL OPERATING EXPENSES 248,808,533 239,218,920 9,589,612
85 OPERATING INCOME (248,808,533) (239,218,920) (9,589,612)
86 ADD: IERCO OPERATING INCOME E10 0 0 0
87 CONSOLIDATED OPERATING INCOME (248,808,533) (239,218,920) (9,589,612)
88
89 NET POWER SUPPLY COSTS:
90 ACCT 447/SURPLUS SALES 0 0 0
91 ACCT 501/FUEL-THERMAL PLANTS 0 0 0
92 ACCT 547/FUEL-OTHER 0 0 0
93 ACCT 555/NON-FIRM PURCHASES 0 0 0
94 ACCT 555/DEMAND RESPONSE INCENTIVE 0 0 0
95 ACCT 555/CSPP PURCHASES 0 0 0
96 SUBTOTAL 0 0 0
97 ACCT 536NVATER FOR POWER(PCA&OTHER) 0 0 0
98 ACCT 565/TRANS OF ELECTRICTY BY OTHERS 0 0 0
99 TOTAL NET POWER SUPPLY COSTS 0 0 0
100 OTHER O&M V1.Larkin Workpaper
101 TOTAL O&M EXPENSES 229,857,514 221,465,558 8,391,95C 3se No. IPC-E-24-07
102 LESS: ACCT 501/FUEL-THERMAL PLANTS 0 0 0 Page 3 of 37
3 of 37 103 ACCT 547/FUEL-OTHER Settled RB&Labor 0 0 FQ enue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
104 ACCT 555/NON-FIRM PURCHASES 0 0 0
105 ACCT 555/DEMAND RESPONSE INCENTIVE 0 0 0
106 ACCT 555/CSPP PURCHASES 0 0 0
107 SUBTOTAL 229,857,514 221,465,558 8,391,956
108 ACCT 536/WATER FOR POWER(PCA&OTHER) 0 0 0
109 ACCT 565/TRANS OF ELECTRICTY BY OTHERS 0 0 0
110 ACCT 416/MERCHANDISING EXPENSE 0 0 0
111 NET OTHER O&M 229,857,514 221,465,558 8,391,956
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 4 of 37
4 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
112 TABLE 1-ELECTRIC PLANT IN SERVICE (175,720,053)
113 INTANGIBLE PLANT
114 301-ORGANIZATION P101 P $ 5,703 5,454 249
115 302-FRANCHISES&CONSENTS D10 52,690,324 50,540,892 2,149,432
116 303-MISCELLANEOUS P101 P 52,524,883 50,233,758 2,291,125
117
118 TOTAL INTANGIBLE PLANT 105,220,910 100,780,103 4,440,807
119
120 PRODUCTION PLANT
121 310-316/STEAM PRODUCTION D10 274,155,558 262,971,743 11,183,815
122 330-336/HYDRAULIC PRODUCTION D10 1,092,528,822 1,047,960,547 44,568,275
123 340-346/OTHER PRODUCTION-BASE LOAD D10 443,280,152 425,197,122 18,083,030
124 340-346/OTHER PRODUCTION-PEAKERS D10 182,564,265 175,116,796 7,447,469
125
126 TOTAL PRODUCTION PLANT 1,992,528,797 1,911,246,209 81,282,589
127
128 TRANSMISSION PLANT
129 350/LAND&LAND RIGHTS-SYSTEM SERVICE D11 41,039,057 39,364,923 1,674,134
130 DIRECT ASSIGNMENT DA350 0 0 0
131 TOTAL ACCOUNT350 41,039,057 39,364,923 1,674,134
132
133 352/STRUCTURES&IMPROVEMENTS-SYSTEM SERVICE D11 100,561,627 96,459,348 4,102,279
134 DIRECT ASSIGNMENT DA352 658 0 658
135 TOTAL ACCOUNT 352 100,562,285 96,459,348 4,102,937
136
137 353/STATION EQUIPMENT-SYSTEM SERVICE D11 468,388,599 449,281,302 19,107,296
138 DIRECT ASSIGNMENT DA353 111,594 75,100 36,494
139 TOTAL ACCOUNT 353 468,500,193 449,356,402 19,143,790
140
141 354/TOWERS&FIXTURES-SYSTEM SERVICE D11 237,158,275 227,483,716 9,674,560
142 DIRECT ASSIGNMENT DA354 0 0 0
143 TOTAL ACCOUNT 354 237,158,275 227,483,716 9,674,560
144
145 355/POLES&FIXTURES-SYSTEM SERVICE D11 236,032,717 226,404,073 9,628,644
146 DIRECT ASSIGNMENT DA355 33,842 0 33,842
147 TOTAL ACCOUNT 355 236,066,559 226,404,073 9,662,486
148
149 356/OVERHEAD CONDUCTORS&DEVICES-SYSTEM SERVICE D11 271,730,786 260,645,887 11,084,900
150 DIRECT ASSIGNMENT DA356 26,495 1,189 25,306
151 TOTAL ACCOUNT 356 271,757,281 260,647,076 11,110,206
152
153 359/ROADS&TRAILS-SYSTEM SERVICE D11 390,266 374,346 15,920
154 DIRECT ASSIGNMENT DA359 0 0 0
155 TOTAL ACCOUNT 359 390,266 374,346 15,920
156
157 TOTAL TRANSMISSION PLANT 1,355,473,916 1,300,089,883 55,384,033
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 5 of 37
5 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
158 TABLE 1-ELECTRIC PLANT IN SERVICE
159
160 DISTRIBUTION PLANT
161 360/LAND&LAND RIGHTS-SYSTEM SERVICE ACCT360 9,601,720 9,271,376 330,344
162 PLUS:ADJUSTMENT FOR CIAC ACCT360CIAC 430,656 430,355 301
163 DISTRIBUTION PLANT+CIAC 10,032,376 9,701,731 330,645
164
165 361/STRUCTURES&IMPROVEMENTS-SYSTEM SERVICE ACCT361 62,384,614 59,436,491 2,948,123
166 PLUS:ADJUSTMENT FOR CIAC ACCT361CIAC 8,009,324 7,447,616 561,708
167 DISTRIBUTION PLANT+CIAC 70,393,938 66,884,107 3,509,831
168
169 362/STATION EQUIPMENT-SYSTEM SERVICE ACCT362 343,076,495 328,626,219 14,450,276
170 PLUS:ADJUSTMENT FOR CIAC ACCT362CIAC 38,463,951 34,892,876 3,571,075
171 DISTRIBUTION PLANT+CIAC 381,540,447 363,519,096 18,021,351
172
173 363/STORAGE BATTERY EQUIPMENT D10 112,074,984 106,951,451 5,123,533
174 TOTAL BATTERY STORAGE EQUIPMENT 112,074,984 106,951,451 5,123,533
175
176 364/POLES,TOWERS&FIXTURES DA364 334,235,525 308,137,437 26,098,088
177 365/OVERHEAD CONDUCTORS&DEVICES DA365 162,758,591 153,461,377 9,297,214
178 366/UNDERGROUND CONDUIT DA366 54,848,113 53,988,992 859,120
179 367/UNDERGROUND CONDUCTORS&DEVICES DA367 338,877,918 333,844,506 5,033,412
180 368/LINE TRANSFORMERS DA368 745,644,817 704,503,661 41,141,155
181 369/SERVICES DA369 69,707,265 66,979,720 2,727,544
182 370/METERS DA370 116,503,219 112,739,963 3,763,256
183 371/INSTALLATIONS ON CUSTOMER PREMISES DA371 4,646,860 4,326,265 320,595
184 373/STREET LIGHTING SYSTEMS DA373 6,313,711 6,061,607 252,104
185
186 TOTAL DISTRIBUTION PLANT(without CIAC) 2,360,673,832 2,248,329,066 112,344,765
187
188 GENERALPLANT
189 389/LAND&LAND RIGHTS PTD 20,940,797 20,027,363 913,434
190 390/STRUCTURES&IMPROVEMENTS PTD 170,196,006 162,772,088 7,423,917
191 391/OFFICE FURNITURE&EQUIPMENT PTD 41,438,522 39,630,982 1,807,540
192 392/TRANSPORTATION EQUIPMENT PTD 119,914,591 114,683,939 5,230,652
193 393/STORES EQUIPMENT PTD 5,476,857 5,237,957 238,899
194 394/TOOLS,SHOP&GARAGE EQUIPMENT PTD 15,380,479 14,709,585 670,894
195 395/LABORATORY EQUIPMENT PTD 14,914,034 14,263,486 650,547
196 396/POWER OPERATED EQUIPMENT PTD 27,588,092 26,384,705 1,203,387
197 397/COMMUNICATIONS EQUIPMENT PTD 82,670,542 79,064,468 3,606,073
198 398/MISCELLANEOUS EQUIPMENT PTD 11,406,368 10,908,824 497,544
199
200 TOTAL GENERAL PLANT 509,926,287 487,683,399 22,242,888
201
202 TOTAL ELECTRIC PLANT IN SERVICE(without CIAC) 6,323,823,741 6,048,128,660 275,695,082
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 6 of 37
6 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
203 TABLE 2-ACCUMULATED PROVISION FOR DEPRECIATION
204
205 PRODUCTION PLANT
206 310-316/STEAM PRODUCTION L 121 151,132,377 144,967,130 6,165,246
207 330-336/HYDRAULIC PRODUCTION L 122 510,334,076 489,515,669 20,818,407
208 340-346/OTHER PRODUCTION-BASE LOAD L 123 95,989,012 92,073,267 3,915,745
209 340-346/OTHER PROD UCTION-PEAKERS L 124 67,786,643 65,021,376 2,765,267
210 TOTAL PRODUCTION PLANT 825,242,107 791,577,442 33,664,665
211
212 TRANSMISSION PLANT
213 350/LAND&LAND RIGHTS L 131 10,201,355 9,785,205 416,151
214 352/STRUCTURES&IMPROVEMENTS L 135 34,251,518 32,854,058 1,397,461
215 353/STATION EQUIPMENT L 139 123,269,932 118,232,894 5,037,039
216 354/TOWERS&FIXTURES L 143 80,447,813 77,166,051 3,281,763
217 355/POLES&FIXTURES L 147 80,583,039 77,284,679 3,298,360
218 356/OVERHEAD CONDUCTORS&DEVICES L 151 90,332,368 86,639,325 3,693,042
219 359/ROADS&TRAILS L 155 297,401 285,269 12,132
220 TOTAL TRANSMISSION PLANT 419,383,427 402,247,480 17,135,948
221
222 DISTRIBUTION PLANT
223 360/LAND&LAND RIGHTS L 161 239,442 231,204 8,238
224 361/STRUCTURES&IMPROVEMENTS L 165 16,778,902 15,985,978 792,924
225 362/STATION EQUIPMENT L 169 72,249,574 69,206,444 3,043,130
226 363/STORAGE BATTERY EQUIPMENT L 173 3,548,486 3,386,266 162,220
227 364/POLES,TOWERS&FIXTURES L 176 144,727,473 133,426,728 11,300,745
228 365/OVERHEAD CONDUCTORS&DEVICES L 177 56,593,997 53,361,193 3,232,803
229 366/UNDERGROUND CONDUIT L 178 18,880,710 18,584,970 295,740
230 367/UNDERGROUND CONDUCTORS&DEVICES L 179 105,526,973 103,959,562 1,567,410
231 368/LINE TRANSFORMERS L 180 199,797,737 188,773,843 11,023,894
232 369/SERVICES L 181 45,500,962 43,720,575 1,780,387
233 370/METERS L 182 37,281,576 36,077,317 1,204,260
234 371/INSTALLATIONS ON CUSTOMER PREMISES L 183 1,185,775 1,103,966 81,809
235 373/STREET LIGHTING SYSTEMS L 184 33,016 31,698 1,318
236 TOTAL DISTRIBUTION PLANT 702,344,623 667,849,745 34,494,878
237
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 7 of 37
7 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
238 TABLE 2-ACCUMULATED PROVISION FOR DEPRECIATION
239
240 GENERALPLANT
241 389/LAND&LAND RIGHTS L 189 0 0 0
242 390/STRUCTURES&IMPROVEMENTS L 190 36,044,691 34,472,428 1,572,263
243 391/OFFICE FURNITURE&EQUIPMENT L 191 18,757,637 17,939,432 818,205
244 392/TRANSPORTATION EQUIPMENT L 192 23,975,721 22,929,905 1,045,816
245 393/STORES EQUIPMENT L 193 1,468,592 1,404,532 64,060
246 394/TOOLS,SHOP&GARAGE EQUIPMENT L 194 5,026,782 4,807,514 219,267
247 395/LABORATORY EQUIPMENT L 195 6,860,809 6,561,542 299,267
248 396/POWER OPERATED EQUIPMENT L 196 5,419,822 5,183,410 236,412
249 397/COMMUNICATIONS EQUIPMENT L 197 33,453,398 31,994,167 1,459,231
250 398/MISCELLANEOUS EQUIPMENT L 198 4,396,481 4,204,708 191,774
251 TOTAL GENERAL PLANT 135,403,933 129,497,639 5,906,294
252
253 AMORTIZATION OF DISALLOWED COSTS L 118 3,297,393 3,158,228 139,165
254
255 TOTAL ACCUM PROVISION DEPRECIATION 2,085,671,484 1,994,330,534 91,340,950
256
257 AMORTIZATION OF OTHER UTILITY PLANT
258 302/FRANCHISES AND CONSENTS L 115 18,778,074 18,012,048 766,027
259 303/MISCELLANEOUS INTANGIBLE PLANT L 116 23,137,432 22,128,182 1,009,250
260
261 TOTAL AMORT OF OTHER UTILITY PLANT 41,915,507 40,140,230 1,775,277
262
263 TOTAL ACCUM PROVISION FOR DEPR
264 &AMORTIZATION OF OTHER UTILITY PLANT 2,127,586,991 2,034,470,764 93,116,227
265
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 8 of 37
8 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
266 TABLE 3-ADDITIONS&DEDUCTIONS TO RATEBASE
267
268 NET ELECTRIC PLANT IN SERVICE 4,196,236,751 4,013,657,896 182,578,855
269 LESS:
270 252 CUSTOMER ADVANCES FOR CONSTRUCTION
271 POWER SUPPLY D10 0 0 0
272 OTHER DA252 0 0 0
273 TOTAL CUSTOMER ADV FOR CONSTRUCTION 0 0 0
274
275 ACCUMULATED DEFERRED INCOME TAXES
276 190/ACCUMULATED DEFERRED INCOME TAXES
277 CUSTOMER ADVANCES FOR CONSTUCTION DA252 (1,806,678) (1,793,446) (13,232)
278 OTHER LABOR (18,108,580) (17,318,189) (790,391)
279 TOTAL ACCOUNT 190 (19,915,258) (19,111,635) (803,623)
280 281/ACCELERATED AMORTIZATION P101 P 0 0 0
281 282/OTHER PROPERTY P101 P 395,790,474 378,526,169 17,264,305
282 283/OTHER P101 P 6,265,289 5,991,998 273,291
283 TOTAL ACCUM DEFERRED INCOME TAXES 382,140,505 365,406,532 16,733,973
284
285 NET ELECTRIC PLANT IN SERVICE 3,814,096,246 3,648,251,364 165,844,882
286 ADD:
287 WORKING CAPITAL
288 151/FUEL INVENTORY E10 0 0 0
289 154&163/PLANT MATERIALS&SUPPLIES
290 PRODUCTION-GENERAL L 126 0 0 0
291 TRANSMISSION-GENERAL L 157 0 0 0
292 DISTRIBUTION-GENERAL L 186+CIAC 0 0 0
293 OTHER-UNCLASSIFIED L 202 0 0 0
294 TOTAL ACCOUNT 154&163 0 0 0
295 165/PREPAID ITEMS
296 AD VALOREM TAXES L 697 0 0 0
297 OTHER PROD-RELATED PREPAYMENTS D10 0 0 0
298 INSURANCE L 126 0 0 0
299 PENSION EXPENSE L 1039 0 0 0
300 PREPAID RETIREE BENEFITS L 1039 0 0 0
301 MISCELLANEOUS PREPAYMENTS P101P 0 0 0
302 TOTAL ACCOUNT165 0 0 0
303 WORKING CASH ALLOWANCE L 618 0 0 0
304
305 TOTAL WORKING CAPITAL 0 0 0
306
307 NET ELECTRIC PLANT IN SERVICE 3,814,096,246 3,648,251,364 165,844,882
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 9 of 37
9 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
308 TABLE 3-ADDITIONS&DEDUCTIONS TO RATEBASE
309
310 NET ELECTRIC PLANT IN SERVICE 3,814,096,246 3,648,251,364 165,844,882
311 ADD:
312 105/PLANT HELD FOR FUTURE USE
313 HYDRAULIC PRODUCTION L 122 0 0 0
314 TRANS LAND&LAND RIGHTS L 131 0 0 0
315 TRANS STRUCTURES&IMPROVEMENTS L 135 0 0 0
316 TRANS STATION EQUIPMENT L 139 0 0 0
317 DIST LAND&LAND RIGHTS L 163 0 0 0
318 DIST STRUCTURES&IMPROVEMENTS L 167 0 0 0
319 DIST STATIONS EQUIPMENT 0
320 GEN LAND&LAND RIGHTS L 189 0 0 0
321 GEN STRUCTURES&IMPROVEMENTS L 190 0 0 0
322 COMMUNICATION L 192 0 0 0
323 TOTAL PLANT HELD FOR FUTURE USE 0 0 0
324
325 114/115-ASSET EXCHANGE ACQUISITION ADJUSTMENT CIDA 628,247 628,247 0
326
327 DEFERRED PROGRAMS:
328 182/ CONSERVATION PROGRAMS
329 IDAHO DEFERRED CONSERVATION PROGRAMS CIDA 0 0 0
330 OREGON DEFERRED CONSERVATION PROGRAMS CODA 0 0 0
331 TOTAL CONSERVATION PROGRAMS 0 0 0
332 182&186/MISC.OTHER REGULATORY ASSETS
333 CUB FUND INTEREST(OPUC 15-399) CODA 0 0 0
334 AM.FALLS BOND REFINANCING D10 0 0 0
335 SFAS 87 CAPITALIZED PENSION-OPUC ORDER 10-064 CODA 0 0 0
336 CLOUD COMPUTING-(IPUC Order 34707) CIDA 0 0 0
337 WILDFIRE MITIGATION(IPUC Order 35077) CIDA 0 0 0
338 SIEMENS LTP RATE BASE(IPUC Order 33420) CIDA 0 0 0
339 SIEMENS LTP DEFERRED RATE BASE(IPUC Order 33420) CIDA 0 0 0
340 SIEMENS LTP RATE BASE(OPUC ORDER 15-387) CODA 0 0 0
341 SIEMENS LTP DEFERRED RATE BASE(OPUC ORDER 15-387) CODA 0 0 0
342 TOTAL OTHER REGULATORY ASSETS 0 0 0
343 186/MISC.OTHER DEFERRED PROGRAMS 0 0 0
344 254/JIM BRIDGER PLANT END OF LIFE DEPR-OPUC ORD 12-296 CODA 0 0 0
345 RECONNECT FEES-(OPUC ADV 16-09) CODA 0 0 0
346 TOTAL DEFERRED PROGRAMS 0 0 0
347
348 DEVELOPMENT OF IERCO RATE BASE
349 INVESTMENT IN IERCO E10 0 0 0
350 PREPAID COAL ROYALTIES E10 0 0 0
351 NOTES PAYABLE TO/RECEIVABLE FROM SUBSIDIARY E10 0 0 0
352 TOTAL SUBSIDIARY RATE BASE 0 0 0
353
354 TOTAL COMBINED RATE BASE 3,814,724,493 3,648,879,611 165,844,882
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 10 of 37
10 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
355 TABLE 4-OPERATING REVENUES
356 FIRM ENERGY SALES
357 440-448/RETAIL RETREV 0 0 0
358 442/BASE REVENUE TRANSFER-PCA CIDA 0 0 0
359 442/BASE REVENUE TRANSFER-EE RIDER CIDA 0 0 0
360 447/SYSTEM OPPORTUNITY SALES E10 0 0 0
361 447.050/FINANCIAL LOSSES E10 0 0 0
362 TOTAL SALES OF ELECTRICITY 0 0 0
363
364 OTHER OPERATING REVENUES
365 415/MERCHANDISING REVENUES D60 0 0 0
366
367 449/OATT TARIFF REFUND
368 NETWORK D11 0 0 0
369 POINT-TO-POINT D11 0 0 0
370 TOTAL ACCOUNT 449 0 0 0
371
372 451/MISCELLANEOUS SERVICE REVENUES DA451 0 0 0
373
374 454/RENTS FROM ELECTRIC PROPERTY
375 SUBSTATION EQUIPMENT L 139 0 0 0
376 TRANSFORMER RENTALS D11 0 0 0
377 LINE RENTALS D11 0 0 0
378 COGENERATION L 495 0 0 0
379 DARK FIBER PROJECT CIDA 0 0 0
380 POLE ATTACHMENTS L 176 0 0 0
381 FACILITIES CHARGES DA454 0 0 0
382 OTHER RENTALS L122 0 0 0
383 MISCELLANEOUS PTD 0 0 0
384 TOTAL ACCOUNT 454 0 0 0
385
386 456/OTHER ELECTRIC REVENUES
387 TRANSMISSION NETWORK SERVICES-FIRM DA D11 0 0 0
388 TRANSMISSION NETWORK SERVICES-DIST FACILITIES D60 0 0 0
389 TRANSMISSION POINT-TO-POINT D11 0 0 0
390 PHOTOVOLTAIC STATION SERVICE L 186+CIAC 0 0 0
391 ENERGY EFFICIENCY RIDER CIDA 0 0 0
392 STAND-BYSERVICE DASTNBY 0 0 0
393 SIERRA PACIFIC USAGE CHARGE E10 0 0 0
394 ANTELOPE L 515 0 0 0
395 MISCELLANEOUS PTD 0 0 0
396 TOTAL ACCOUNT 456 0 0 0
397
398 TOTAL OTHER OPERATING REVENUES 0 0 0
399
400 TOTAL OPERATING REVENUES 0 0 0
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 11 of 37
11 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
401 TABLE 5-OPERATION&MAINTENANCE EXPENSES
402 STEAM POWER GENERATION
403 OPERATION
404 500/SUPERVISION&ENGINEERING D10 115,363 110,657 4,706
405 501/FUEL E10 0 0 0
406 502/STEAM EXPENSES
407 LABOR D10 0 0 0
408 OTHER E10 0 0 0
409 TOTAL ACCOUNT502 0 0 0
410 505/ELECTRIC EXPENSES
411 LABOR D10 0 0 0
412 OTHER E10 0 0 0
413 TOTAL ACCOUNT505 0 0 0
414 506/MISCELLANEOUS EXPENSES D10 139 134 6
415 507/RENTS L 121 0 0 0
416 STEAM OPERATION EXPENSES 115,502 110,791 4,712
417
418 MAINTENANCE
419 510/SUPERVISION&ENGINEERING D10 0 0 0
420 511 /STRUCTURES D10 0 0 0
421 512/BOILER PLANT
422 LABOR D10 0 0 0
423 OTHER E10 0 0 0
424 TOTAL ACCOUNT512 0 0 0
425 513/ELECTRIC PLANT
426 LABOR D10 0 0 0
427 OTHER E10 0 0 0
428 TOTAL ACCOUNT513 0 0 0
429 514/MISCELLANEOUS STEAM PLANT D10 0 0 0
430 STEAM MAINTENANCE EXPENSES 0 0 0
431 TOTAL STEAM GENERATION EXPENSES 115,502 110,791 4,712
432
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 12 of 37
12 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
433 TABLE 5-OPERATION&MAINTENANCE EXPENSES
434 HYDRAULIC POWER GENERATION
435 OPERATION
436 535/SUPERVISION&ENGINEERING L 892 4,956,942 4,753,475 203,467
437 536/WATER FOR POWER
438 WATER FOR POWER/WCLOUD SEEDING D10 1,031,085 989,024 42,062
439 WATER LEASE D10 0 0 0
440 536 TOTAL ACCOUNT 536 1,031,085 989,024 42,062
441 537/HYDRAULIC EXPENSES D10 7,443,522 7,139,873 303,649
442 538/ELECTRIC EXPENSES
443 LABOR D10 1,801,400 1,727,914 73,486
444 OTHER E10 0 0 0
445 TOTAL ACCOUNT 538 1,801,400 1,727,914 73,486
446 539/MISCELLANEOUS EXPENSES D10 4,022,565 3,858,470 164,095
447 540/RENTS D10 0 0 0
448 HYDRAULIC OPERATION EXPENSES 19,255,514 18,468,756 786,758
449
450 MAINTENANCE
451 541/SUPERVISION&ENGINEERING L 903 104,038 99,794 4,244
452 542/STRUCTURES D10 689,550 661,421 28,129
453 543/RESERVOIRS,DAMS&WATERWAYS D10 302,571 290,228 12,343
454 544/ELECTRIC PLANT
455 LABOR D10 2,105,412 2,019,524 85,887
456 OTHER E10 0 0 0
457 TOTAL ACCOUNT 544 2,105,412 2,019,524 85,887
458 545/MISCELLANEOUS HYDRAULIC PLANT L 122 2,619,430 2,512,574 106,856
459 HYDRAULIC MAINTENANCE EXPENSES 5,821,001 5,583,541 237,460
460 TOTAL HYDRAULIC GENERATION EXPENSES 25,076,515 24,052,297 1,024,219
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 13 of 37
13 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
461 TABLE 5-OPERATION&MAINTENANCE EXPENSES
462 OTHER POWER GENERATION
463 OPERATION
464 546/SUPERVISION&ENGINEERING L 916 609,948 585,066 24,882
465 547/FUEL
466 DIESEL FUEL E10 0 0 0
467 OTHER E10 0 0 0
468 TOTAL ACCOUNT 547 0 0 0
469 548/GENERATING EXPENSES
470 LABOR D10 3,738,956 3,586,431 152,526
471 OTHER E10 0 0 0
472 TOTAL ACCOUNT 548 3,738,956 3,586,431 152,526
473 549/MISCELLANEOUS EXPENSES D10 431,985 414,363 17,622
474 550/RENTS D10 0 0 0
475 OTHER POWER OPER EXPENSES 4,780,890 4,585,860 195,030
476
477 MAINTENANCE
478 551/SUPERVISION&ENGINEERING L 926 0 0 0
479 552/STRUCTURES D10 53,429 51,249 2,180
480 553/GENERATING&ELECTRIC PLANT
481 LABOR D10 69,314 66,486 2,828
482 OTHER E10 0 0 0
483 TOTAL ACCOUNT 553 69,314 66,486 2,828
484 554/MISCELLANEOUS EXPENSES L 124 554,042 531,441 22,601
485 OTHER POWER MAINT EXPENSES 676,784 649,176 27,609
486 TOTAL OTHER POWER GENERATION EXP 5,457,674 5,235,036 222,639
487
488 OTHER POWER SUPPLY EXPENSE
489 555.0/PURCHASED POWER
490 POWER EXPENSE E10 0 0 0
491 OTHER CIDA 0 0 0
492 TRANSMISSION LOSSES E10 0 0 0
493 DEMAND RESPONSE INCENTIVE CIDA 0 0 0
494 TOTAL 555.0/PURCHASED POWER 0 0 0
495 555.1/COGENERATION&SMALL POWER PROD E10 0 0 0
496 555/TOTAL 0 0 0
497 556/LOAD CONTROL&DISPATCHING EXPENSES D10 0 0 0
498 557/OTHER EXPENSES
499 PCA/EPC ACCOUNTS CIDA 0 0 0
500 OREGON POWER COST-RELATED EXPENSES CODA 0 0 0
501 OTHER D10 5,226,939 5,013,712 213,226
502 557/TOTAL 5,226,939 5,013,712 213,226
503 TOTAL OTHER POWER SUPPLY EXPENSES 5,226,939 5,013,712 213,226
504
505 TOTAL PRODUCTION EXPENSES 35,876,630 34,411,835 1,464,795
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 14 of 37
14 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
506 TABLE 5-OPERATION&MAINTENANCE EXPENSES
507 TRANSMISSION EXPENSES
508 OPERATION
509 560/SUPERVISION&ENGINEERING L 157 2,777,635 2,664,142 113,493
510 561/LOAD DISPATCHING D12 3,536,030 3,391,783 144,248
511 562/STATION EXPENSES L 139 2,272,101 2,179,259 92,842
512 563/OVERHEAD LINE EXPENSES L 143+147+151 505,284 484,633 20,651
513 565/TRANSMISSION OF ELECTRICITY BY OTHERS E10 0 0 0
514 566/MISCELLANEOUS EXPENSES L 157 0 0 0
515 567/RENTS L 157 0 0 0
516 TOTAL TRANSMISSION OPERATION 9,091,051 8,719,818 371,234
517
518 MAINTENANCE
519 568/SUPERVISION&ENGINEERING L 157 105,816 101,493 4,324
520 569/STRUCTURES L 135 1,671,766 1,603,558 68,208
521 570/STATION EQUIPMENT L 139 2,720,699 2,609,526 111,173
522 571/OVERHEAD LINES L 143+147+151 1,048,408 1,005,559 42,848
523 573/MISCELLANEOUS PLANT L 157 4,259 4,085 174
524 TOTAL TRANSMISSION MAINTENANCE 5,550,949 5,324,222 226,727
525
526 TOTAL TRANSMISSION EXPENSES 14,642,000 14,044,040 597,960
527
528 REGIONAL MARKET EXPENSES
529 OPERATION
530 575/OPER TRANS MKT ADMIN-EIM L 157 0 0 0
531
532 TOTAL REGIONAL MARKET EXPENSES 0 0 0
533
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 15 of 37
15 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
534 TABLE 5-OPERATION&MAINTENANCE EXPENSES
535 DISTRIBUTION EXPENSES
536 OPERATION
537 580/SUPERVISION&ENGINEERING L 186 3,522,183 3,354,562 167,621
538 581/LOAD DISPATCHING D60 5,395,277 5,190,935 204,341
539 582/STATION EXPENSES L 171 1,150,537 1,096,194 54,343
540 583/OVERHEAD LINE EXPENSES L 176+177 4,042,871 3,754,943 287,928
541 584/UNDERGROUND LINE EXPENSES L 178+179 1,551,681 1,528,458 23,223
542 585/STREET LIGHTING&SIGNAL SYSTEMS L 184 24,691 23,705 986
543 586/METER EXPENSES L 182 4,843,487 4,687,034 156,453
544 587/CUSTOMER INSTALLATIONS EXPENSE L 183 864,599 804,949 59,650
545 588/MISCELLANEOUS EXPENSES L 186 3,430,741 3,267,471 163,269
546 589/RENTS L 186 0 0 0
547 TOTAL DISTRIBUTION OPERATION 24,826,067 23,708,252 1,117,815
548
549 MAINTENANCE
550 590/SUPERVISION&ENGINEERING L 186 11,002 10,478 524
551 591/STRUCTURES L167 0 0 0
552 592/STATION EQUIPMENT L 171 3,164,754 3,015,273 149,481
553 593/OVERHEAD LINES L 176+177 6,239,308 5,794,952 444,356
554 594/UNDERGROUND LINES L 178+179 427,358 420,962 6,396
555 595/LINE TRANSFORMERS L 180 29,370 27,750 1,621
556 596/STREET LIGHTING&SIGNAL SYSTEMS L 184 148,234 142,316 5,919
557 597/METERS L 182 795,630 769,930 25,700
558 598/MISCELLANEOUS PLANT L 186 95,035 90,512 4,523
559 TOTAL DISTRIBUTION MAINTENANCE 10,910,692 10,272,173 638,519
560 TOTAL DISTRIBUTION EXPENSES 35,736,759 33,980,425 1,756,334
561
562 CUSTOMER ACCOUNTING EXPENSES
563 901/SUPERVISION L 996 834,306 792,709 41,597
564 902/METER READING CW902 1,492,691 1,292,885 199,806
565 903/CUSTOMER RECORDS&COLLECTIONS CW903 10,740,459 10,387,850 352,609
566 904/UNCOLLECTIBLE ACCOUNTS CW904 0 0 0
567 905/MISC EXPENSES L 564+565+566 0 0 0
568 TOTAL CUSTOMER ACCOUNTING EXPENSES 13,067,456 12,473,444 594,012
569
570 CUSTOMER SERVICES&INFORMATION EXPENSES
571 907/SUPERVISION L 1004 969,984 944,335 25,649
572 908/CUSTOMER ASSISTANCE
573 SYSTEM CONSERVATION E10 0 0 0
574 OTHER CUSTOMER ASSISTANCE DA908 8,975,081 8,742,190 232,891
575 TOTAL ACCOUNT 908 8,975,081 8,742,190 232,891
576 909/INFORMATION&INSTRUCTIONAL DA909 0 0 0
577 910/MISCELLANEOUS EXPENSES L 575+576 367,037 357,512 9,524
578 912/DEMO AND SELLING EXPENSES E10 0 0 0
579 TOTAL CUST SERV&INFORMATN EXPENSES 10,312,102 10,044,037 268,064
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 16 of 37
16 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
580 TABLE 5-OPERATION&MAINTENANCE EXPENSES
581 ADMINISTRATIVE&GENERAL EXPENSES
582 920/ADMINISTRATIVE&GENERAL SALARIES LABOR 82,423,153 78,825,604 3,597,549
583 921/OFFICE SUPPLIES LABOR 298,415 285,390 13,025
584 922/ADMIN&GENERAL EXPENSES TRANSFERRED-CR LABOR (36,723,488) (35,120,607) (1,602,882)
585 923/OUTSIDE SERVICES LABOR 0 0 0
586 924/PROPERTY INSURANCE
587 PRODUCTION-STEAM D10 0 0 0
588 ALL RISK&MISCELLANEOUS P110P 447,587 429,003 18,585
589 TOTAL ACCOUNT 924 447,587 429,003 18,585
590 925/INJURIES&DAMAGES LABOR 157,805 150,917 6,888
591 926/EMPLOYEE PENSIONS&BENEFITS LABOR 36,978,319 35,364,315 1,614,004
592 EMPLOYEE PENSIONS&BENEFITS-OREGON CODA 0 0 0
593 EMPLOYEE PENSIONS&BENEFITS-IDAHO CIDA 35,182,378 35,182,378 0
594 EMPLOYEE PENSIONS&BENEFITS-CAPITALIZED OREGON CODA 0 0 0
595 927/FRANCHISE REQUIREMENTS CIDA 0 0 0
596 928/REGULATORY COMMISSION EXPENSES
597 928.101/FERC ADMIN ASSESS&SECURITIES
598 CAPACITY RELATED D10 0 0 0
599 ENERGY RELATED E10 0 0 0
600 FERC RATE CASE E99 0 0 0
601 FERC ORDER 472 D11 0 0 0
602 FERC OTHER D11 0 0 0
603 FERC-OREGON HYDRO FEE D11 0 0 0
604 SEC EXPENSES CIDA 0 0 0
605 IDAHO PUC -RATE CASE CIDA 0 0 0
606 -OTHER CIDA 0 0 0
607 OREGON PUC-RATE CASE CODA 0 0 0
608 -OTHER CODA 0 0 0
609 TOTAL ACCOUNT 928 0 0 0
610 929/DUPLICATE CHARGES LABOR 0 0 0
611 930.1/GENERAL ADVERTISING LABOR 0 0 0
612 930.2/MISCELLANEOUS EXPENSES LABOR 231,349 221,252 10,098
613 931/RENTS L 200 0 0 0
614 TOTAL ADM&GEN OPERATION 118,995,518 115,338,251 3,657,267
615 PLUS:
616 935/GENERAL PLANT MAINTENANCE L 200 1,227,049 1,173,526 53,524
617 416/MERCHANDISING EXPENSE D60 0 0 0
618 TOTAL OPER&MAINT EXPENSES 229,857,514 221,465,558 8,391,956
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 17 of 37
17 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
619 TABLE 6-DEPRECIATION&AMORTIZATION EXPENSE
620
621 DEPRECIATION EXPENSE
622 310-316/STEAM PRODUCTION L 121 9,604,775 9,212,961 391,814
623 330-336/HYDRAULIC PRODUCTION L 122 25,359,140 24,324,647 1,034,493
624 340-346/OTHER PROD UCTION-BASELOAD L 123 13,814,802 13,251,245 563,557
625 340-346/OTHER PROD UCTION-PEAKERS L 124 6,173,315 5,921,482 251,832
626 TOTAL PRODUCTION PLANT 54,952,032 52,710,336 2,241,696
627
628 TRANSMISSION PLANT
629 350/LAND&LAND RIGHTS L 131 416,355 399,371 16,985
630 352/STRUCTURES&IMPROVEMENTS L 135 1,920,891 1,842,519 78,372
631 353/STATION EQUIPMENT L 139 10,291,818 9,871,275 420,543
632 354/TOWERS&FIXTURES L 143 2,890,165 2,772,265 117,900
633 355/POLES&FIXTURES L 147 6,155,439 5,903,489 251,949
634 356/OVERHEAD CONDUCTORS&DEVICES L 151 4,098,377 3,930,824 167,553
635 359/ROADS&TRAILS L 155 2,693 2,583 110
636 TOTAL TRANSMISSION PLANT 25,775,739 24,722,326 1,053,413
637
638 DISTRIBUTION PLANT
639 360/LAND&LAND RIGHTS L 163 30,928 29,909 1,019
640 361/STRUCTURES&IMPROVEMENTS L 167 1,393,285 1,323,816 69,469
641 362/STATION EQUIPMENT L 171 6,761,927 6,442,540 319,387
642 363/STORAGE BATTERY EQUIPMENT L 173 8,740,027 8,340,475 399,552
643 364/POLES,TOWERS&FIXTURES L 176 6,652,506 6,133,059 519,447
644 365/OVERHEAD CONDUCTORS&DEVICES L 177 3,687,824 3,477,165 210,659
645 366/UNDERGROUND CONDUIT L 178 1,327,818 1,307,020 20,798
646 367/UNDERGROUND CONDUCTORS&DEVICES L 179 7,931,228 7,813,424 117,804
647 368/LINE TRANSFORMERS L 180 14,560,366 13,756,994 803,372
648 369/SERVICES L 181 1,163,810 1,118,272 45,538
649 370/METERS L 182 5,908,929 5,718,060 190,869
650 371/INSTALLATIONS ON CUSTOMER PREMISES L 183 193,380 180,039 13,342
651 373/STREET LIGHTING SYSTEMS L 184 217,455 208,773 8,683
652 TOTAL DISTRIBUTION PLANT 58,569,484 55,849,545 2,719,939
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 18 of 37
18 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
653 TABLE 6-DEPRECIATION&AMORTIZATION EXPENSE
654
655 GENERALPLANT
656 389/LAND&LAND RIGHTS L 189 0 0 0
657 390/STRUCTURES&IMPROVEMENTS L 190 3,366,802 3,219,943 146,859
658 391/OFFICE FURNITURE&EQUIPMENT L 191 6,992,274 6,687,273 305,002
659 392/TRANSPORTATION EQUIPMENT L 192 72,444 69,284 3,160
660 393/STORES EQUIPMENT L 193 227,417 217,497 9,920
661 394/TOOLS,SHOP&GARAGE EQUIPMENT L 194 808,645 773,372 35,273
662 395/LABORATORY EQUIPMENT L 195 781,567 747,475 34,092
663 396/POWER OPERATED EQUIPMENT L 196 0 0 0
664 397/COMMUNICATIONS EQUIPMENT L 197 5,615,068 5,370,140 244,928
665 398/MISCELLANEOUS EQUIPMENT L 198 860,793 823,246 37,548
666 TOTAL GENERAL PLANT 18,725,011 17,908,229 816,781
667
668 TOTAL DEPRECIATION EXPENSE 158,022,265 151,190,436 6,831,829
669
670 DEPRECIATION ON DISALLOWED COSTS L 118 (296,299) (283,794) (12,505)
671 TOTAL DEPRECIATION EXPENSE 157,725,966 150,906,642 6,819,324
672
673 AMORTIZATION EXPENSE
674 302/FRANCHISES AND CONSENTS L 115 1,543,543 1,480,576 62,967
675 303/MISCELLANEOUS INTANGIBLE PLANT L 116 4,422,755 4,229,835 192,920
676 ADJUSTMENTS,GAINS&LOSSES L 118 15,018 14,384 634
677 TOTAL AMORTIZATION EXPENSE 5,981,316 5,724,796 256,520
678
679 TOTAL DEPRECIATION&AMORTIZATION EXP 163,707,282 156,631,438 7,075,844
680
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 19 of 37
19 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
681 TABLE 7-TAXES OTHER THAN INCOME TAXES
682
683 TAXES OTHER THAN INCOME
684 FEDERALTAXES
685 FICA LABOR 0 0 0
686 FUTA LABOR 0 0 0
687 LESS PAYROLL DEDUCTION LABOR 0 0 0
688
689 STATE TAXES
690 AD VALOREM TAXES
691 JIM BRIDGER STATION L 121 0 0 0
692 VALMY L 121 0 0 0
693 OTHER-PRODUCTION PLANT L 126 0 0 0
694 OTHER-TRANSMISSION PLANT L 157 0 0 0
695 OTHER-DISTRIBUTION PLANT L 186 0 0 0
696 OTHER-GENERAL PLANT L200 0 0 0
697 SUB-TOTAL 0 0 0
698
699 LICENSES-HYDRO PROJECTS L 122 0 0 0
700
701 REGULATORY COMMISSION FEES
702 STATE OF IDAHO CIDA 0 0 0
703 STATE OF OREGON CODA 0 0 0
704
705 FRANCHISE TAXES
706 STATE OF OREGON CODA 0 0 0
707
708 OTHER STATE TAXES
709 UNEMPLOYMENT TAXES LABOR 0 0 0
710 HYDRO GENERATION KWH TAX E10 0 0 0
711 IRRIGATION-PIC E10 0 0 0
712
713 TOTAL TAXES OTHER THAN INCOME 0 0 0
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 20 of 37
20 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
714 TABLE 8-REGULATORY DEBITS&CREDITS
715 REGULATORY DEBITS/CREDITS
716 STATE OF IDAHO CIDA 0 0 0
717 STATE OF OREGON CODA 0 0 0
718
719 TOTAL REGULATORY DEBITS/CREDITS 0 0 0
720
721
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 21 of 37
21 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
722 TABLE 9-INCOME TAXES
723
724 410/411 NET PROVISION FOR DEFERRED INCOME TAXES
725 ACCOUNT#282-RELATED P101 P (16,604,189) (15,879,917) (724,272)
726 ACCOUNTS#190&#283-RELATED L 753 (1,269,034) (1,219,159) (49,875)
727 TOTAL NET PROVISION FOR DEFERRED INCOME TAXES (17,873,223) (17,099,076) (774,147)
728
729 411.4-INVESTMENT TAX CREDIT ADJUSTMENT P101 P 25,014,178 23,923,064 1,091,114
730
731 SUMMARY OF INCOME TAXES
732
733 TOTAL FEDERAL INCOME TAX (104,708,343) (100,471,089) (4,237,254)
734
735 STATE INCOME TAX
736 STATE OF IDAHO (45,200,749) (43,322,871) (1,877,878)
737 STATE OF OREGON (1,495,270) (1,435,070) (60,200)
738 OTHER STATES (492,857) (473,033) (19,824)
739 TOTAL STATE INCOME TAXES (47,188,876) (45,230,974) (1,957,902)
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 22 of 37
22 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
740 TABLE 10-CALCULATION OF FEDERAL INCOME TAX
741 OPERATING REVENUES 0 0 0
742
743 OPERATING EXPENSES
744 OPERATION&MAINTENANCE 229,857,514 221,465,558 8,391,956
745 DEPRECIATION EXPENSE 157,725,966 150,906,642 6,819,324
746 AMORTIZATION OF LIMITED TERM PLANT 5,981,316 5,724,796 256,520
747 TAXES OTHER THAN INCOME 0 0 0
748 REGULATORY DEBITS/CREDITS 0 0 0
749 TOTAL OPERATING EXPENSES 393,564,796 378,096,995 15,467,801
750
751 BOOK-TAX ADJUSTMENT L 749 0 0 0
752
753 INCOME BEFORE TAX ADJUSTMENTS(NOI Before Interest) (393,564,796) (378,096,995) (15,467,801)
754
755 INCOME STATEMENT ADJUSTMENTS
756 INTEREST EXPENSE SYNCHRONIZATION L 354 115,891,410 110,853,039 5,038,371
757
758 NET OPERATING INCOME BEFORE TAXES (509,456,206) (488,950,034) (20,506,172)
759
760 TOTAL STATE INCOME TAXES(ALLOWED) (47,188,876) (45,230,974) (1,957,902)
761
762 NET FEDERAL INCOME AFTER STATE INCOME TAXES (462,267,330) (443,719,060) (18,548,270)
763
764 FEDERAL TAX AT21 PERCENT @ 21% (97,076,139) (93,181,003) (3,895,137)
765 OTHER CURRENT TAX ADJUSTMENTS L 764 0 0 0
766 PRIOR YEAR TAX ADJUSTMENT L 764 0 0 0
767
768 TOTAL FEDERAL INCOME TAX BEFORE OTHER ADJUSTMENTS (97,076,139) (93,181,003) (3,895,137)
769
770 OTHER TAX ADJUSTMENTS
771 ALLOWANCE FOR AFUDC P101 P 0 0 0
772 FEDERAL INCOME TAX ADJUSTMENTS-PLANT P101 P 3,451,222 3,300,680 150,542
773 FEDERAL INCOME TAX ADJUSTMENTS-OTHER L753 10,147,810 9,748,983 398,827
774 SUM OF OTHER ADJUSTMENTS 13,599,032 13,049,663 549,369
775 FEDERAL TAX ON OTHER TAX ADJ AT 21 PERCENT @ 21% 2,855,797 2,740,429 115,367
776 FEDERAL GENERAL BUSINESS CREDITS P101 P 10,488,000 10,030,515 457,485
777
778 TOTAL FEDERAL INCOME TAX (104,708,343) (100,471,089) (4,237,254)
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 23 of 37
23 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
779 TABLE 11-OREGON STATE INCOME TAX
780
781 NET OPERATING INCOME BEFORE TAXES-OREGON L 758 (509,456,206) (488,950,034) (20,506,172)
782
783 ALLOWANCE FOR AFUDC P101 P 0 0 0
784 STATE INCOME TAX ADJUSTMENTS-PLANT P101 P 3,451,222 3,300,680 150,542
785 STATE INCOMETAXADJUSTMENTS-OTHER L 753 10,147,810 9,748,983 398,827
786 ADD: OTHER L 753 0 0 0
787
788 TOTAL STATE INCOME TAX ADJUSTMENTS-OREGON 13,599,032 13,049,663 549,369
789
790 INCOME SUBJECT TO OREGON TAX (495,857,174) (475,900,371) (19,956,803)
791
792 IERCO TAXABLE INCOME E10 3,000,000 2,867,063 132,937
793 BONUS DEPRECIATION&OTHER OREGON ADJ P101 P (5,566,032) (5,323,243) (242,789)
794 OTHER L 753 0 0 0
795
796 TOTAL STATE TAXABLE INCOME-OREGON (498,423,206) (478,356,551) (20,066,655)
797 APPORTIONMENT FACTOR(0.045454550) @ 0.045454550 (22,655,603) (21,743,482) (912,121)
798 POST APPORTIONMENT M ITEMS L 753 0 0 0
799 TOTAL TAXABLE INCOME-OREGON (22,655,603) (21,743,482) (912,121)
800
801 OREGON TAX AT 6.6 PERCENT @ 6.60% (1,495,270) (1,435,070) (60,200)
802 LESS:INVESTMENT TAX CREDIT P101 P 0 0 0
803
804 STATE INCOME TAX ALLOWED-OREGON (1,495,270) (1,435,070) (60,200)
805 ADD: OR CAT TAX L 785 0 0 0
806 PRIOR YEARS'TAX ADJUSTMENT L 785 0 0 0
807
808 STATE INCOME TAX PAID-OREGON (1,495,270) (1,435,070) (60,200)
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 24 of 37
24 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
809 TABLE 12-IDAHO STATE INCOME TAX
810
811 NET OPERATING INCOME BEFORE TAXES-IDAHO L 744 (509,456,206) (488,950,034) (20,506,172)
812
813 ALLOWANCE FOR AFUDC P101 P 0 0 0
814 STATE INCOME TAX ADJUSTMENTS-PLANT P101 P 3,451,222 3,300,680 150,542
815 STATE INCOMETAXADJUSTMENTS-OTHER L 753 10,147,810 9,748,983 398,827
816
817 INCOME SUBJECT TO IDAHO TAX (495,857,174) (475,900,371) (19,956,803)
818
819 IERCO TAXABLE INCOME E10 3,000,000 2,867,063 132,937
820 BONUS DEPRECIATION ADJUSTMENT P101 P (29,602,625) (28,311,364) (1,291,261)
821 OTHER L 753 0 0 0
822 TOTAL STATE TAXABLE INCOME-IDAHO (522,459,799) (501,344,672) (21,115,127)
823 APPORTIONMENT FACTOR(.965517241) @ 0.965517241 (504,443,943) (484,056,925) (20,387,019)
824 POST APPORTIONMENT SCHEDULE M L 753 0 0 0
825 TOTAL TAXABLE INCOME-IDAHO (504,443,943) (484,056,925) (20,387,019)
826 IDAHO TAX AT 5.8 PERCENT @ 5.80% (29,257,749) (28,075,302) (1,182,447)
827 LESS:INVESTMENT TAX CREDIT P101 P 15,943,000 15,247,569 695,431
828
829 STATE INCOME TAX ALLOWED-IDAHO (45,200,749) (43,322,871) (1,877,878)
830 ADD: CURRENT TAX ADJUSTMENT L 826 0 0 0
831 PRIOR YEARS'TAX ADJUSTMENT 826 0 0 0
832 STATE INCOME TAX PAID-IDAHO (45,200,749) (43,322,871) (1,877,878)
833
834 OTHER STATE INCOME TAX
835 INCOME SUBJECT TO TAX (495,857,174) (475,900,371) (19,956,803)
836
837 IERCO TAXABLE INCOME E10 3,000,000 2,867,063 132,937
838 BONUS DEPRECIATION ADJUSTMENT P101 P 0 0 0
839 OTHER L 753 0 0 0
840 TOTAL TAXABLE INCOME-OTHER STATES (492,857,174) (473,033,308) (19,823,866)
841 APPORTIONMENT FACTOR(1.0) (492,857,174) (473,033,308) (19,823,866)
842 POST APPORTIONMENT SCHEDULE M L 756 0 0 0
843 TAXABLE INCOME (492,857,174) (473,033,308) (19,823,866)
844 OTHER TAX AT 0.1 PERCENT (492,857) (473,033) (19,824)
845 ADD:CURRENT YEAR'S TAX DEFICIENCY L 829 0 0 0
846 PRIOR YEARS'TAX ADJUSTMENT L 829 0 0 0
847 OTHER STATES'INCOME TAX PAID (492,857) (473,033) (19,824)
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 25 of 37
25 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
848 TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
849 STEAM POWER GENERATION
850 OPERATION
851 500/SUPERVISION&ENGINEERING L 852-862 266,133 255,277 10,857
852 501/FUEL D10 2,559,614 2,455,198 104,416
853 502/STEAM EXPENSES
854 LABOR D10 1,607,750 1,542,164 65,586
855 OTHER D10 0 0 0
856 TOTAL ACCOUNT 502 1,607,750 1,542,164 65,586
857 505/ELECTRIC EXPENSES
858 LABOR D10 626,112 600,571 25,541
859 OTHER D10 0 0 0
860 TOTAL ACCOUNT 505 626,112 600,571 25,541
861 506/MISCELLANEOUS EXPENSES D10 3,352,418 3,215,661 136,757
862 507/RENTS D10 0 0 0
863 STEAM OPERATION EXPENSES 8,412,027 8,068,870 343,158
864
865 MAINTENANCE
866 510/SUPERVISION&ENGINEERING L 867-876 0 0 0
867 511 /STRUCTURES D10 658 631 27
868 512/BOILER PLANT
869 LABOR D10 3,983,710 3,821,200 162,510
870 OTHER D10 0 0 0
871 TOTAL ACCOUNT 512 3,983,710 3,821,200 162,510
872 513/ELECTRIC PLANT
873 LABOR D10 1,522,637 1,460,523 62,114
874 OTHER D10 0 0 0
875 TOTAL ACCOUNT513 1,522,637 1,460,523 62,114
876 514/MISCELLANEOUS STEAM PLANT D10 2,441,874 2,342,261 99,613
877 STEAM MAINTENANCE EXPENSES 7,948,879 7,624,615 324,264
878 TOTAL STEAM GENERATION EXPENSES 16,360,906 15,693,485 667,422
879
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 26 of 37
26 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
880 TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
881 HYDRAULIC POWER GENERATION
882 OPERATION
883 535/SUPERVISION&ENGINEERING L 884-891 4,235,258 4,061,414 173,844
884 536/WATER FOR POWER E10 866,414 $28,021 38,393
885 537/HYDRAULIC EXPENSES D10 6,262,192 6,006,734 255,458
886 538/ELECTRIC EXPENSES
887 LABOR D10 1,510,454 1,448,837 61,617
888 OTHER D10 0 0 0
889 TOTAL ACCOUNT 538 1,510,454 1,448,837 61,617
890 539/MISCELLANEOUS EXPENSES D10 3,401,219 3,262,471 138,748
891 540/RENTS D10 0 0 0
892 HYDRAULIC OPERATION EXPENSES 16,275,537 15,607,477 668,060
893
894 MAINTENANCE
895 541/SUPERVISION&ENGINEERING L 896-902 90,192 86,513 3,679
896 542/STRUCTURES D10 577,669 554,103 23,565
897 543/RESERVOIRS,DAMS&WATERWAYS D10 254,872 244,475 10,397
898 544/ELECTRIC PLANT
899 LABOR D10 1,799,397 1,725,993 73,404
900 OTHER D10 0 0 0
901 TOTAL ACCOUNT 544 1,799,397 1,725,993 73,404
902 545/MISCELLANEOUS HYDRAULIC PLANT D10 2,163,612 2,075,350 88,262
903 HYDRAULIC MAINTENANCE EXPENSES 4,885,742 4,686,434 199,307
904 TOTAL HYDRAULIC GENERATION EXPENSES 21,161,279 20,293,911 867,367
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 27 of 37
27 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
905 TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
906 OTHER POWER GENERATION
907 OPERATION
908 546/SUPERVISION&ENGINEERING L 909-915 516,722 495,643 21,079
909 547/FUEL E10 0 0 0
910 548/GENERATING EXPENSES
911 LABOR D10 3,234,939 3,102,974 131,965
912 OTHER D10 0 0 0
913 TOTAL ACCOUNT 548 3,234,939 3,102,974 131,965
914 549/MISCELLANEOUS EXPENSES D10 370,607 355,488 15,118
915 550/RENTS D10 0 0 0
916 OTHER POWER OPER EXPENSES 4,122,267 3,954,105 168,162
917
918 MAINTENANCE
919 551/SUPERVISION&ENGINEERING L 920-925 0 0 0
920 552/STRUCTURES D10 43,046 41,290 1,756
921 553/GENERATING&ELECTRIC PLANT
922 LABOR D10 56,825 54,507 2,318
923 OTHER D10 0 0 0
924 TOTAL ACCOUNT 553 56,825 54,507 2,318
925 554/MISCELLANEOUS EXPENSES D10 690,424 662,259 28,165
926 OTHER POWER MAINT EXPENSES 790,295 758,056 32,239
927 TOTAL OTHER POWER GENERATION EXP 4,912,562 4,712,161 200,402
928
929 OTHER POWER SUPPLY EXPENSE
930 555.0/PURCHASED POWER E10 0 0 0
931 555.1/COGENERATION&SMALL POWER PROD
932 CAPACITY RELATED D10 0 0 0
933 ENERGY RELATED E10 0 0 0
934 TOTAL 555.1/CSPP 0 0
935 555/TOTAL 0 0
936 556/LOAD CONTROL&DISPATCHING EXPENSES D10 0 0 0
937 557/OTHER EXPENSES D10 4,495,330 4,311,949 183,381
938 TOTAL OTHER POWER SUPPLY EXPENSES 4,495,330 4,311,949 183,381
939
940 TOTAL PRODUCTION EXPENSES 46,930,078 45,011,506 1,918,572
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 28 of 37
28 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
941 TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
942 TRANSMISSION EXPENSES
943 OPERATION
944 560/SUPERVISION&ENGINEERING L 157 2,380,639 2,283,367 97,272
945 561/LOAD DISPATCHING D12 3,053,979 2,929,396 124,583
946 562/STATION EXPENSES L 139 1,883,621 1,806,653 76,968
947 563/OVERHEAD LINE EXPENSES L 143+147+151 428,401 410,892 17,509
948 565/TRANSMISSION OF ELECTRICITY BY OTHERS E10 0 0 0
949 566/MISCELLANEOUS EXPENSES L 526 0 0 0
950 567/RENTS L 157 0 0 0
951 TOTAL TRANSMISSION OPERATION 7,746,639 7,430,307 316,332
952
953 MAINTENANCE
954 568/SUPERVISION&ENGINEERING L 157 90,949 87,233 3,716
955 569/STRUCTURES L 135 1,442,019 1,383,185 58,834
956 570/STATION EQUIPMENT L 139 2,327,169 2,232,077 95,092
957 571/OVERHEAD LINES L 143+147+151 865,811 830,425 35,385
958 573/MISCELLANEOUS PLANT L 157 3,520 3,376 144
959 TOTAL TRANSMISSION MAINTENANCE 4,729,468 4,536,296 193,172
960
961 TOTAL TRANSMISSION EXPENSES 12,476,107 11,966,603 509,504
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 29 of 37
29 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
962 TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
963 DISTRIBUTION EXPENSES
964 OPERATION
965 580/SUPERVISION&ENGINEERING L 186 2,995,909 2,854,543 141,367
966 581/LOAD DISPATCHING D60 4,166,909 4,009,091 157,818
967 582/STATION EXPENSES L 171 983,432 936,981 46,451
968 583/OVERHEAD LINE EXPENSES L 176+177 3,611,849 3,354,617 257,231
969 584/UNDERGROUND LINE EXPENSES L 178+179 1,372,655 1,352,112 20,543
970 585/STREET LIGHTING&SIGNAL SYSTEMS L 184 20,365 19,552 813
971 586/METER EXPENSES L 182 4,176,379 4,041,475 134,904
972 587/CUSTOMER INSTALLATIONS EXPENSE L 183 736,676 685,851 50,825
973 588/MISCELLANEOUS EXPENSES L 560 2,911,186 2,749,719 161,468
974 589/RENTS L 186 0 0 0
975 TOTAL DISTRIBUTION OPERATION 20,975,360 20,003,940 971,420
976
977 MAINTENANCE
978 590/SUPERVISION&ENGINEERING L 186 9,353 8,912 441
979 591/STRUCTURES L 167 0 0 0
980 592/STATION EQUIPMENT L 171 2,716,642 2,588,326 128,316
981 593/OVERHEAD LINES L 176+177 5,201,009 4,830,600 370,409
982 594/UNDERGROUND LINES L 178+179 304,799 300,238 4,562
983 595/LINE TRANSFORMERS L 180 25,793 24,370 1,423
984 596/STREET LIGHTING&SIGNAL SYSTEMS L 184 123,794 118,851 4,943
985 597/METERS L 182 678,112 656,208 21,904
986 598/MISCELLANEOUS PLANT L 186 79,964 76,191 3,773
987 TOTAL DISTRIBUTION MAINTENANCE 9,139,466 8,603,695 535,771
988 TOTAL DISTRIBUTION EXPENSES 30,114,827 28,607,635 1,507,191
989
990 CUSTOMER ACCOUNTING EXPENSES
991 901/SUPERVISION L 992 705,017 610,646 94,371
992 902/METER READING CW902 1,267,888 1,098,173 169,715
993 903/CUSTOMER RECORDS&COLLECTIONS CW903 9,731,713 9,412,221 319,492
994 904/UNCOLLECTIBLE ACCOUNTS CW904 0 0 0
995 905/MISC EXPENSES L 992-994 0 0 0
996 TOTAL CUSTOMER ACCOUNTING EXPENSES 11,704,618 11,121,040 583,577
997
998 CUSTOMER SERVICES&INFORMATION EXPENSES
999 907/SUPERVISION L 1003 828,671 806,758 21,912
1000 908/CUSTOMER ASSISTANCE L 572 4,679,331 4,555,597 123,734
1001 908/ENERGY EFFICIENCY RIDER CIDA 0 0 0
1002 909/INFORMATION&INSTRUCTIONAL L 576 0 0 0
1003 910/MISCELLANEOUS EXPENSES L 1000+1002 308,799 300,634 8,165
1004 TOTAL CUST SERV&INFORMATN EXPENSES 5,816,801 5,662,989 153,812
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 30 of 37
30 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
1005 TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
1006 ADMINISTRATIVE&GENERAL EXPENSES
1007 920/ADMINISTRATIVE&GENERAL SALARIES PTDCAS 53,511,744 51,175,830 2,335,915
1008 921/OFFICE SUPPLIES PTDCAS 228,890 218,898 9,992
1009 922/ADMIN&GENERAL EXPENSES TRANSFERRED-CR SUBEX 0 0 0
1010 923/OUTSIDE SERVICES PTDCAS 0 0 0
1011 924/PROPERTY INSURANCE 0
1012 PRODUCTION-STEAM L 121 0 0 0
1013 ALL RISK&MISCELLANEOUS P110P 378,934 363,208 15,726
1014
1015 925/INJURIES&DAMAGES LABOR 132,355 126,578 5,777
1016 926/EMPLOYEE PENSIONS&BENEFITS LABOR 0 0 0
1017 927/FRANCHISE REQUIREMENTS CIDA 0 0 0
1018 928/REGULATORY COMMISSION EXPENSES
1019 928.101/FERC ADMIN ASSESS&SECURITIES
1020 CAPACITY RELATED D10 0 0 0
1021 ENERGY RELATED E10 0 0 0
1022 928.101/FERC ORDER 472 E99 0 0 0
1023 928.101/FERC MISCELLANIOUS L RESREV 0 0 0
1024 928.102 FERC RATE CASE RESREV 0 0 0
1025 928.104/FERC OREGON HYDRO RESREV 0 0 0
1026 SEC EXPENSES L202 0 0 0
1027 928.202/IDAHO PUC -RATE CASE CIDA 0 0 0
1028 928.203/IDAHO PUC-OTHER CIDA 0 0 0
1029 928.301/OREGON PUC-FILING FEES CODA 0 0 0
1030 928.302/OREGON PUC-RATE CASE CODA 0 0 0
1031 928.303/OREGON PUC-OTHER CODA 0 0 0
1032 IPC/PUC JSS TRUE-UP ADJ PTD 0 0 0
1033 TOTAL ACCOUNT 928 0 0
1034 929/DUPLICATE CHARGES SUBEX 0 0 0
1035 930.1/GENERAL ADVERTISING RELAB 0 0 0
1036 930.2/MISCELLANEOUS EXPENSES PTDCAS 214,755 205,380 9,375
1037 931/RENTS L 200 0 0 0
1038 TOTAL ADM&GEN OPERATION 54,466,679 52,089,895 2,376,784
1039 PLUS:
1040 935/GENERAL PLANT MAINTENANCE P3908 1,038,440 993,286 45,155
1041 416/MERCHANDISING EXPENSE E10 0 0 0
1042 TOTAL OPER&MAINT EXPENSES 162,547,550 155,452,955 7,094,595
1043 TOTAL LABOR-RATIO(%) 100.00% 95.64% 4.36%
1044
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 31 of 37
31 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
1045 TABLE 14-ALLOCATION FACTORS
1046
1047 CAPACITY RELATED KW
1048 PRODUCTION RELATED COINCIDENT PEAKS @ GEN LEVEL D10 2,585,316 2,479,852 105,465
1049 SYSTEM TRANSMISSION SERVICE @ GENERATION LEVEL D11 2,585,316 2,479,852 105,465
1050 RETAIL TRANSMISSION SERVICE @ GENERATION LEVEL D12 2,585,316 2,479,852 105,465
1051 DISTRIBUTION SERVICE @ GENERATION LEVEL D60 2,431,714 2,339,615 92,099
1052
1053 ENERGY RELATED MWH
1054 GENERATION LEVEL(PSP) E10 16,783,429 16,039,716 743,713
1055 CUSTOMER LEVEL E99 15,740,718 15,039,426 701,292
1056
1057 CUSTOMER RELATED FACTORS
1058 902-CUSTOMER WEIGHTED CW902 1,819,788 1,576,198 243,590
1059 903-CUSTOMER WEIGHTED CW903 15,041,849 14,548,026 493,823
1060 904-CUSTOMER WEIGHTED CW904 2,751,851 2,564,962 186,889
1061 909-DIRECT ASSIGN-AVG.NO.CUST. DA909 610,567 590,862 19,705
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 32 of 37
32 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
1062 TABLE 14-ALLOCATION FACTORS
1063
1064 DIRECT ASSIGNMENTS (red font denotes allocator comes from Plant Book)
1065 252-CUSTOMER ADVANCES DA252 13,139,360 13,043,126 96,234
1066 350-LAND&LAND RIGHTS DA350 0 0 0
1067 352-STRUCTURES&IMPROVEMENTS DA352 658 0 658
1068 353-STATION EQUIPMENT DA353 111,594 75,100 36,494
1069 354-TOWERS&FIXTURES DA354 0 0 0
1070 355-POLES&FIXTURES DA355 33,842 0 33,842
1071 356-OVERHEAD CONDUCTORS&DEVICES DA356 26,495 1,189 25,306
1072 359-ROADS&TRAILS DA359 0 0 0
1073 360LAND&LAND RIGHTS ACCT360 7,818,143 7,549,162 268,981
1074 360LAND&LAND RIGHTS-CIAC ACCT360CIAC 430,656 430,355 301
1075 361-STRUCTURES&IMPROVEMENTS ACCT361 52,245,201 49,776,238 2,468,963
1076 361-STRUCTURES&IMPROVEMENTS-CIAC ACCT361CIAC 8,009,324 7,447,616 561,708
1077 362-STATION EQUIPMENT ACCT362 300,357,806 287,706,828 12,650,978
1078 362-STATION EQUIPMENT-CIAC ACCT362CIAC 38,463,951 34,892,876 3,571,075
1079 364-POLES,TOWERS&FIXTURES-NET DA364 313,204,206 288,748,305 24,455,901
1080 365-OVERHEAD CONDUCTORS&DEVICES-NET DA365 155,253,318 146,384,826 8,868,492
1081 366-UNDERGROUND CONDUIT-NET DA366 52,785,315 51,958,505 826,810
1082 367-UNDERGROUND CONDUCTORS&DEVICES-NET DA367 318,155,073 313,429,461 4,725,612
1083 368-LINE TRANSFORMERS DA368 704,959,938 666,063,582 38,896,356
1084 369-DIRECT ASSIGNMENT DA369 67,920,301 65,262,678 2,657,623
1085 370-METERS DA370 112,940,727 109,292,546 3,648,181
1086 371-INSTALLATIONS ON CUSTOMER PREMISES-NET DA371 4,931,439 4,591,211 340,228
1087 373-STREET LIGHTING SYSTEMS-NET DA373 5,706,749 5,478,881 227,868
1088 451-REVENUE-MISCELLANEOUS SERVICE DA451 4,936,204 4,890,357 45,847
1089 454-REVENUE-FACILITIES CHARGE DA454 10,470,031 10,041,240 428,792
1090 908-OTHER CUSTOMER ASSISTANCE DA908 6,971,635 6,790,730 180,904
1091 440-RETAIL SALES REVENUE RETREV 1,169,833,173 1,116,166,332 53,666,841
1092 447-WHOLESALE SALES REVENUE RESREV 0 0 0
1093 456-REVENUE-STANDBY SERVICE DASTNBY 1 1 0
1094 440-REVENUE OFFSET FOR PLANT ADDITIONS DAREV 1 1 0
1095 IDAHO CIDA 1 1 0
1096 OREGON CODA 1 0 1
1097 NET TO GROSS TAX MULTIPLIER DA990 1.347 1.347 1.347
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 33 of 37
33 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
1098 TABLE 14-ALLOCATION FACTORS
1099
1100 INTERNALLY DEVELOPED ALLOCATION FACTORS
1101 PLANT-PROD,TRANS&DIST PTD 5,708,676,545 5,459,665,157 249,011,387
1102 LAB-PROD,TRANS,DIST,CUST ACCT&CSIS PTDCAS 107,042,430 102,369,774 4,672,656
1103 PLANT-HYDRO,OTHER,TSUBS,DSUBS&GP P110P 3,202,823,113 3,069,836,325 132,986,789
1104 PLANT-GEN PLT(390,391,397&398) P3908 305,711,437 292,376,362 13,335,075
1105 PLANT-PROD,TRANS,DIST&GEN P101P 6,218,602,832 5,947,348,556 271,254,275
1106 O&M-PROD,TRANS,DIST,CUST ACCT&CSIS SUBEX 109,634,947 104,953,781 4,681,166
1107 LAB-PROD,TRANS,DIST,CUST ACCT&CSIS RELAB 3,202,823,113 3,069,836,325 132,986,789
1108 LAB-ALL LABOR WITHOUT925-6 "CIRC" LABOR 161,161,999 154,127,711 7,034,288
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 34 of 37
34 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
1109 TABLE 15-ALLOCATION FACTORS-RATIOS
1110
1111 CAPACITY RELATED KW
1112 PRODUCTION RELATED COINCIDENT PEAKS @ GEN LEVEL D10 100.00% 95.92% 4.08%
1113 SYSTEM TRANSMISSION SERVICE @ GENERATION LEVEL D11 100.00% 95.92% 4.08%
1114 RETAIL TRANSMISSION SERVICE @ GENERATION LEVEL D12 100.00% 95.92% 4.08%
1115 DISTRIBUTION SERVICE @ GENERATION LEVEL D60 100.00% 96.21% 3.79%
1116
1117 ENERGY RELATED MWH
1118 GENERATION LEVEL(PSP) E10 100.00% 95.57% 4.43%
1119 CUSTOMER LEVEL E99 100.00% 95.54% 4.46%
1120
1121 CUSTOMER RELATED FACTORS
1122 369-DIRECT ASSIGNMENT DA369 100.00% 96.09% 3.91%
1123 370-METERS DA370 100.00% 96.77% 3.23%
1124 902-CUSTOMER WEIGHTED CW902 100.00% 86.61% 13.39%
1125 903-CUSTOMER WEIGHTED CW903 100.00% 96.72% 3.28%
1126 904-CUSTOMER WEIGHTED CW904 100.00% 93.21% 6.79%
1127 909-DIRECT ASSIGN-AVG.NO.CUST. DA909 100.00% 96.77% 3.23%
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 35 of 37
35 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
1128 TABLE 15-ALLOCATION FACTORS-RATIOS
1129
1130 DIRECT ASSIGNMENTS
1131 252-CUSTOMER ADVANCES DA252 100.00% 99.27% 0.73%
1132 350-LAND&LAND RIGHTS DA350 #DIV/0! #DIV/0! #DIV/0!
1133 352-STRUCTURES&IMPROVEMENTS DA352 100.00% 0.00% 100.00%
1134 353-STATION EQUIPMENT DA353 100.00% 67.30% 32.70%
1135 354-TOWERS&FIXTURES DA354 #DIV/0! #DIV/0! #DIV/0!
1136 355-POLES&FIXTURES DA355 100.00% 0.00% 100.00%
1137 356-OVERHEAD CONDUCTORS&DEVICES DA356 100.00% 4.49% 95.51%
1138 359-ROADS&TRAILS DA359 #DIV/0! #DIV/0! #DIV/0!
1139 360LAND&LAND RIGHTS-DA DA360 100.00% 96.56% 3.44%
1140 360LAND&LAND RIGHTS-CIAC DA360C 100.00% 99.93% 0.07%
1141 361-STRUCTURES&IMPROVEMENTS-DA DA361 100.00% 95.27% 4.73%
1142 361-STRUCTURES&IMPROVEMENTS-CIAC DA361C 100.00% 92.99% 7.01%
1143 362-STATION EQUIPMENT-DA DA362 100.00% 95.79% 4.21%
1144 362-STATION EQUIPMENT-CIAC DA362C 100.00% 90.72% 9.28%
1145 364-POLES,TOWERS&FIXTURES-NET DA364 100.00% 92.19% 7.81%
1146 365-OVERHEAD CONDUCTORS&DEVICES-NET DA365 100.00% 94.29% 5.71%
1147 366-UNDERGROUND CONDUIT-NET DA366 100.00% 98.43% 1.57%
1148 367-UNDERGROUND CONDUCTORS&DEVICES-NET DA367 100.00% 98.51% 1.49%
1149 368-LINE TRANSFORMERS DA368 100.00% 94.48% 5.52%
1150 371-INSTALLATIONS ON CUSTOMER PREMISES-NET DA371 100.00% 93.10% 6.90%
1151 373-STREET LIGHTING SYSTEMS-NET DA373 100.00% 96.01% 3.99%
1152 451-REVENUE-MISCELLANEOUS SERVICE DA451 100.00% 99.07% 0.93%
1153 454-REVENUE-FACILITIES CHARGE DA454 100.00% 95.90% 4.10%
1154 908-OTHER CUSTOMER ASSISTANCE DA908 100.00% 97.41% 2.59%
1155 440-RETAIL SALES REVENUE RETREV 100.00% 95.41% 4.59%
1156 447-WHOLESALE SALES REVENUE RESREV #DIV/0! #DIV/0! #DIV/0!
1157 456-REVENUE-STANDBY SERVICE DASTNBY 100.00% 100.00% 0.00%
1158 440-REVENUE OFFSET FOR PLANT ADDITIONS DAREV 100.00% 100.00% 0.00%
1159 IDAHO CIDA 100.00% 100.00% 0.00%
1160 OREGON CODA 100.00% 0.00% 100.00%
1161 NET TO GROSS TAX MULTIPLIER DA990 1.347 1.347 1.347
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 36 of 37
36 of 37 Settled RB&Labor Revenue Growth Offset

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-SETTLED 2023 GRC RATE BASE AND LABOR ONLY
FOR THE TEST YEAR ENDING DECEMBER 31,2023
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
1162 TABLE 15-ALLOCATION FACTORS-RATIOS
1163
1164 INTERNALLY DEVELOPED ALLOCATION FACTORS
1165 PLANT-PROD,TRANS&DIST PTD 100.00% 95.64% 4.36%
1166 LAB-PROD,TRANS,DIST,CUST ACCT&CSIS PTDCAS 100.00% 95.63% 4.37%
1167 PLANT-HYDRO,OTHER,TSUBS,DSUBS&GP P110P 100.00% 95.85% 4.15%
1168 PLANT-GEN PLT(390,391,397&398) P3908 100.00% 95.64% 4.36%
1169 PLANT-PROD,TRANS,DIST&GEN P101P 100.00% 95.64% 4.36%
1170 O&M-PROD,TRANS,DIST,CUST ACCT&CSIS SUBEX 100.00% 95.73% 4.27%
1171 LAB-PROD,TRANS,DIST,CUST ACCT&CSIS RELAB 100.00% 95.85% 4.15%
1172 LAB-ALL LABOR WITHOUT 925-6 "CIRC" LABOR 100.00% 95.64% 4.36%
M. Larkin Workpaper
Case No. IPC-E-24-07
Page 37 of 37
37 of 37 Settled RB&Labor Revenue Growth Offset

Description GRC J55 Line Reference
ADIT 282 Account(Ending) 3,173,455 credit balance Row 281
Provision for deferred income taxes-282 acct related 3,173,455 debit balance Row 728
Federal income tax adjustment-plant (14,898,848) tax deduction Row 775 and flows through state tax rows 787 and 817
No state adjustments -
Federal General Business Credits 67,974,000 credit to current expense Row 779
Idaho Investment Tax Credit 6,004,000 credit to current expense Row 830
Investment Tax Credit Adjustment 73,978,000 debit balance Row 732
M.Larkin Workpaper
Case No. IPC-E-24-07
Page 1 of 1
Taxes

Gust, Stacy
From: Keri Hawker <[e-mail]>
Sent: Monday,June 3, 2024 3:45 PM
To: Gust, Stacy
Subject: [EXTERNAL] FW:Attached Image
Attachments: 0132_001.pdf
KEEP IDAHO POWER SECURE! External emails may request information or contain malicious links or attachments.Verify the
sender before proceeding, and check for additional warning messages below.
IPC-E-24-07 additional Ex. A
Keri Hawker I Legal Administrative Assistant
Idaho Public Utilities Commission
From: [e-mail]<[e-mail]>
Sent: Monday,June 3, 2024 3:44 PM
To: Keri Hawker<[e-mail]>
Subject:Attached Image
1

EXHIBIT "A"
I have reviewed the foregoing Protective Agreement dated May 28, 2024, in Case No.
IPC-E-24-07 and agree to be bound by the terms and conditions of such Agreement.
es Chandler
Public Utilities Commission
Employer or Firm
11331 W. Chinden Blvd., Building 8, Suite 201-A
Boise, Idaho 83714
Business Address
Commission Staff
Party
:S- 3o Zy
Date
EXHIBIT"A"

Gust, Stacy
From: Gust, Stacy
Sent: Monday,June 10, 2024 9:03 AM
To: secretary
Subject: RE: IPC-E-24-07 - Idaho Power Company's Limited Rate Case - Workpapers
Thank you so much!
Stacy Gust
Regulatory Administrative Assistant
Idaho Power I Regulatory Affairs
Office 208-388-5749
[e-mail]
From: secretary<[e-mail]>
Sent: Monday,June 10, 2024 8:45 AM
To: Gust, Stacy<[e-mail]>
Subject: [EXTERNAL] RE: IPC-E-24-07- Idaho Power Company's Limited Rate Case-Workpapers
KEEP IDAHO POWER SECURE! External emails may request information or contain malicious links or attachments.Verify the
sender before proceeding, and check for additional warning messages below.
Good morning!
Apologies. Of course, I'll get that taken care of right away.
Let me know if you have any questions.
Thankyou
Monica Barrios-Sanchez
Commission Secretary
Idaho Public Utilities Commission
11331 W. Chinden Blvd.
Bldg. 8, Ste. 201-A
Boise, ID 83714
From: Gust, Stacy<[e-mail]>
Sent: Monday,June 10, 2024 8:36 AM
To: Monica Barrios-Sanchez<[e-mail]>
Subject: IPC-E-24-07- Idaho Power Company's Limited Rate Case-Workpapers
1

CAUTION:This email originated outside the State of Idaho network.Verify links and attachments BEFORE you click or open,even
if you recognize and/or trust the sender.Contact your agency service desk with any concerns.
Hi Monica,
It looks like Idaho Power Company's Workpapers were posted to the Commission site. Could you please have them
removed from the website and distributed to Staff instead?
Thank you.
Stacy Gust
Regulatory Administrative Assistant
Idaho Power I Regulatory Affairs
Office 208-388-S749
[e-mail]
IDAHO POWER LEGAL DISCLAIMER
This transmission may contain information that is privileged, confidential and/or exempt from disclosure
under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure,
copying, distribution, or use of the information contained herein (including any reliance thereon) is
STRICTLY PROHIBITED. If you received this transmission in error, please immediately contact the sender
and destroy the material in its entirety, whether in electronic or hard copy format.Thank you.
2

Gust, Stacy
From: Gust, Stacy
Sent: Tuesday,June 11, 2024 3:04 PM
To: Keri Hawker
Subject: RE: I PC-E-24-07
Thank you.
Stacy Gust
Regulatory Administrative Assistant
Idaho Power I Regulatory Affairs
Office 208-388-5749
[e-mail]
From: Keri Hawker<[e-mail]>
Sent:Tuesday,June 11, 2024 1:57 PM
To: Gust, Stacy<[e-mail]>
Cc: Keri Hawker<[e-mail]>
Subject: [EXTERNAL] IPC-E-24-07
KEEP IDAHO POWER SECURE! External emails may request information or contain malicious links or attachments.Verify the
sender before proceeding, and check for additional warning messages below.
Stacy,
More Exhibit A's for you.
Keri Hawker Legal Administrative Assistant
Idaho Public Utilities Commission
11331 W. Chinden Blvd., Building 8, Suite 201-A
P.O. Box 83720
Boise, Idaho 83720-0074
Direct: [phone] 1 Fax: [phone]
[e-mail]
CONFIDENTIALITY NOTICE: This e-mail may be confidential, privileged, and exempt from public disclosure, and the
sender intends that it be used only by the individual or entity named above. If you are not the intended recipient, then you
may not use, disclose, copy, or distribute the e-mail or its contents. If you believe you have received this e-mail in error,
please immediately notify the sender and delete the copy you received.
1

2

Gust, Stacy
From: Mike Louis <[e-mail]>
Sent: Monday,June 17, 2024 4:25 PM
To: Larkin, Matt
Subject: [EXTERNAL] Draft Production Requests for Capital Projects
Attachments: IPC-E-24-07 Capital Projects PR_DRAFT.pdf
KEEP IDAHO POWER SECURE! External emails may request information or contain malicious links or attachments.Verify the
sender before proceeding, and check for additional warning messages below.
HI Matt,
Here is the first set of draft production requests for the capital project review. We will send the final version soon.
Mike Louis
Engineering Program Manager
Idaho Public Utilities Commission
[e-mail]
208-334-0316 (work)
208-631-6804(cell)

Draft Production Requests for IPC-E-24-07
REQUEST NO.1: Please provide an Excel spreadsheet with formulas intact and
enabled showing all capital projects that makes up the$860,366,584 of Capital Project Cost the
Company is proposing for recovery in this case.For each project,please include the following:
a. Plant Account Description(Such as"Intangible Plant","Hydro Production Plant",
etc.as shown in Larkin's Workpaper No.3,page 1);
b. Project Type Description(As shown in Larkin's Workpaper No.3,page 8—
Column 2);
c. Project ID/Unique Project Identifier;
d. Project Name/Title;
e. Detailed Project Description;
f. Business Need;
g. Actual Project Start Date;
h. Anticipated/Actual In-Service Date;
i. Budgeted Cost by Year;
j. Annual Actual Project Cost to Date(Broken out by year);
k. Cost Benefit Analysis Completed(Yes/No);
1. Request for Proposal Completed(Yes/No);
in. Wildfire Mitigation Related(Yes/No);
n. Grant Funding Awarded(Yes/No).
REQUEST NO.2: For all capital projects that make up the$860,366,584 of Capital
Project Cost the Company is proposing for recovery in this case,please provide an Excel
spreadsheet listing any grants that the Company has applied for and/or have been awarded.For
each grant referenced,please provide the following:
a. Grant Title;
b. Project ID/Unique Project Identifier;
c. Project Name/Title;
d. Date Of Application;
e. Status Of Application;

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Gust, Stacy
From: Gust, Stacy
Sent: Monday,June 17, 2024 11:40 AM
To: Monica Barrios-Sanchez
Subject: RE: IPC-E-24-07 Larkin testimony
Thank you!
Stacy Gust
Regulatory Administrative Assistant
Idaho Power I Regulatory Affairs
Office 208-388-5749
[e-mail]
From: Monica Barrios-Sanchez<[e-mail]>
Sent: Monday,June 17, 2024 11:39 AM
To: Gust, Stacy<[e-mail]>
Subject: [EXTERNAL] RE: IPC-E-24-07 Larkin testimony
KEEP IDAHO POWER SECURE! External emails may request information or contain malicious links or attachments.Verify the
sender before proceeding, and check for additional warning messages below.
I'll get those files swapped so we have the full version of Larkin's testimony.
Thankyou
Monica Barrios-Sanchez
Commission Secretary
Idaho Public Utilities Commission
11331 W. Chinden Blvd.
Bldg. 8, Ste. 201-A
Boise, ID 83714
From: Gust, Stacy<[e-mail]>
Sent: Monday,June 17, 2024 10.36 AM
To: Monica Barrios-Sanchez<[e-mail]>
Subject: FW: IPC-E-24-07 Larkin testimony
CAUTION:This email originated outside the State of Idaho network.Verify links and attachments BEFORE you click or open,
even if you recognize and/or trust the sender.Contact your agency service desk with any concerns.
Hi Monica,
1

It looks like one of the pages on one of the exhibits to Matt Larkin's testimony was cut off. Could you please have the
attached replaced with the version that you have on your system?
Thank you.
Stacy Gust
Regulatory Administrative Assistant
Idaho Power I Regulatory Affairs
Office 208-388-5749
[e-mail]
From: Gust, Stacy
Sent: Monday,June 17, 2024 10:32 AM
To: Keri Hawker<[e-mail]>
Subject: RE: IPC-E-24-07 Larkin testimony
Hi Keri,
Yes,there is a page 2, please see the attached. It must have got cut off somehow. I will ask Monica if she will replace it.
Thank you.
Stacy Gust
Regulatory Administrative Assistant
Idaho Power I Regulatory Affairs
Office 208-388-5749
[e-mail]
From: Keri Hawker<[e-mail]>
Sent: Monday,June 17, 2024 10:23 AM
To: Gust, Stacy<[e-mail]>
Subject: [EXTERNAL] IPC-E-24-07 Larkin testimony
Stacy, good morning.
We were looking at case IPC-E-24-07, specifically the Larkin DI Testimony - Exhibit No 7, and
noticed that it is page 1 of 2, but we do not see a page 2.
Is there a page 2?
Thank you,
Keri Hawker I Legal Administrative Assistant
2

'O
Idaho Public Utilities Commission
11331 W. Chinden Blvd., Building 8, Suite 201-A
P.O. Box 83720
Boise, Idaho 83720-0074
Direct: [phone] 1 Fax: [phone]
[e-mail]
CONFIDENTIALITY NOTICE: This e-mail may be confidential, privileged, and exempt from public disclosure, and the
sender intends that it be used only by the individual or entity named above. If you are not the intended recipient, then you
may not use, disclose, copy, or distribute the e-mail or its contents. If you believe you have received this e-mail in error,
please immediately notify the sender and delete the copy you received.
IDAHO POWER LEGAL DISCLAIMER
This transmission may contain information that is privileged, confidential and/or exempt from disclosure
under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure,
copying, distribution, or use of the information contained herein (including any reliance thereon) is
STRICTLY PROHIBITED. If you received this transmission in error, please immediately contact the sender
and destroy the material in its entirety, whether in electronic or hard copy format.Thank you.
3

Gust, Stacy
From: Gust, Stacy
Sent: Monday,June 17, 2024 10:36 AM
To: Monica Barrios-Sanchez
Subject: FW: IPC-E-24-07 Larkin testimony
Attachments: Larkin DI Testimony.pdf
Hi Monica,
It looks like one of the pages on one of the exhibits to Matt Larkin's testimony was cut off. Could you please have the
attached replaced with the version that you have on your system?
Thank you.
Stacy Gust
Regulatory Administrative Assistant
Idaho Power I Regulatory Affairs
Office 208-388-5749
[e-mail]
From: Gust, Stacy
Sent: Monday,June 17, 2024 10:32 AM
To: Keri Hawker<[e-mail]>
Subject: RE: IPC-E-24-07 Larkin testimony
Hi Keri,
Yes,there is a page 2, please see the attached. It must have got cut off somehow. I will ask Monica if she will replace it.
Thank you.
Stacy Gust
Regulatory Administrative Assistant
Idaho Power I Regulatory Affairs
Office 208-388-5749
[e-mail]
From: Keri Hawker<[e-mail]>
Sent: Monday,June 17, 2024 10:23 AM
To: Gust, Stacy<[e-mail]>
Subject: [EXTERNAL] IPC-E-24-07 Larkin testimony
1

KEEP IDAHO POWER SECURE! External emails may request information or contain malicious links or attachments.Verify the
sender before proceeding, and check for additional warning messages below.
Stacy, good morning.
We were looking at case IPC-E-24-07, specifically the Larkin DI Testimony - Exhibit No 7, and
noticed that it is page 1 of 2, but we do not see a page 2.
Is there a page 2?
Thank you,
Keri Hawker I Legal Administrative Assistant
Idaho Public Utilities Commission
11331 W. Chinden Blvd., Building 8, Suite 201-A
P.O. Box 83720
Boise, Idaho 83720-0074
Direct: [phone] 1 Fax: [phone]
[e-mail]
CONFIDENTIALITY NOTICE: This e-mail may be confidential, privileged, and exempt from public disclosure, and the
sender intends that it be used only by the individual or entity named above. If you are not the intended recipient, then you
may not use, disclose, copy, or distribute the e-mail or its contents. If you believe you have received this e-mail in error,
please immediately notify the sender and delete the copy you received.
2

Gust, Stacy
From: Gust, Stacy
Sent: Monday,June 17, 2024 10:32 AM
To: Keri Hawker
Subject: RE: IPC-E-24-07 Larkin testimony
Attachments: Larkin DI Testimony.pdf
Hi Keri,
Yes,there is a page 2, please see the attached. It must have got cut off somehow. I will ask Monica if she will replace it.
Thank you.
Stacy Gust
Regulatory Administrative Assistant
Idaho Power I Regulatory Affairs
Office 208-388-5749
[e-mail]
From: Keri Hawker<[e-mail]>
Sent: Monday,June 17, 2024 10:23 AM
To: Gust, Stacy<[e-mail]>
Subject: [EXTERNAL] IPC-E-24-07 Larkin testimony
KEEP IDAHO POWER SECURE! External emails may request information or contain malicious links or attachments.Verify the
sender before proceeding, and check for additional warning messages below.
Stacy, good morning.
We were looking at case IPC-E-24-07, specifically the Larkin DI Testimony - Exhibit No 7, and
noticed that it is page I of 2, but we do not see a page 2.
Is there a page 2?
Thank you,
Keri Hawker Legal Administrative Assistant
t
1

Idaho Public Utilities Commission
11331 W. Chinden Blvd., Building 8, Suite 201-A
P.O. Box 83720
Boise, Idaho 83720-0074
Direct: [phone] 1 Fax: [phone]
[e-mail]
CONFIDENTIALITY NOTICE: This e-mail may be confidential, privileged, and exempt from public disclosure, and the
sender intends that it be used only by the individual or entity named above. If you are not the intended recipient, then you
may not use, disclose, copy, or distribute the e-mail or its contents. If you believe you have received this e-mail in error,
please immediately notify the sender and delete the copy you received.
2

BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF THE APPLICATION )
OF IDAHO POWER COMPANY FOR ) CASE NO. IPC-E-24-07
AUTHORITY TO INCREASE RATES FOR )
ELECTRIC SERVICE TO RECOVER )
COSTS ASSOCIATED WITH )
INCREMENTAL CAPITAL INVESTMENTS )
AND CERTAIN ONGOING OPERATIONS )
AND MAINTENANCE EXPENSES . )
IDAHO POWER COMPANY
DIRECT TESTIMONY
OF
MATTHEW T . LARKIN

1 Q. Please state your name, business address, and
2 present position with Idaho Power Company ("Idaho Power" or
3 "Company") .
4 A. My name is Matthew T. Larkin. My business
5 address is 1221 West Idaho Street, Boise, Idaho 83702 . I am
6 employed by Idaho Power as the Revenue Requirement Senior
7 Manager in the Regulatory Affairs Department.
8 Q. Please describe your educational background.
9 A. I received a Bachelor of Business
10 Administration degree in Finance from the University of
11 Oregon in 2007 . In 2008, I earned a Master of Business
12 Administration degree from the University of Oregon. I have
13 also attended electric utility ratemaking courses,
14 including the Electric Rates Advanced Course, offered by
15 the Edison Electric Institute, and Estimation of
16 Electricity Marginal Costs and Application to Pricing,
17 presented by National Economic Research Associates, Inc.
18 Q. Please describe your work experience with
19 Idaho Power.
20 A. I began my employment with Idaho Power as a
21 Regulatory Analyst in January 2009 . As a Regulatory
22 Analyst, I provided support for the Company' s regulatory
23 activities, including compliance reporting, financial
24 analysis, and the development of revenue forecasts for
25 regulatory filings .
LARKIN, DI 1
Idaho Power Company

1 In January 2014, I was promoted to Senior Regulatory
2 Analyst where my responsibilities expanded to include the
3 development of complex cost-related studies and the
4 analysis of strategic regulatory issues .
5 Since becoming the Revenue Requirement Senior
6 Manager in March 2016, I have overseen the Company' s
7 regulatory activities related to revenue requirement, such
8 as power supply expense modeling, jurisdictional separation
9 studies, and Idaho Power' s Open Access Transmission Tariff
10 formula rate.
11 I . OVERVIEW
12 Q. What is the purpose of your testimony in this
13 proceeding?
14 A. The purpose of my testimony in this proceeding
15 is twofold. First, I discuss the development of the Idaho
16 Results of Operations ("ROO") discussed in the Direct
17 Testimony of Company Witness, Mr. Timothy Tatum, Vice
18 President of Regulatory Affairs . Second, I detail the
19 methodology utilized to develop the revenue increase
20 requested in this case.
21 Q. How is your testimony organized?
22 A. My testimony is divided into two sections .
23 Section II provides a detailed discussion of the
24 development of the ROO that was performed at my direction,
25 and the conclusions that can be drawn from the analysis .
LARKIN, DI 2
Idaho Power Company

1 Section III of my testimony details each component of the
2 Company' s incremental revenue request related to the update
3 of capital and labor-related operations and maintenance
4 ("O&M") expense ("O&M Labor") .
5 Q. Did you consult with Mr. Tatum regarding the
6 development of the incremental revenue request?
7 A. Yes . The methodology utilized to develop the
8 incremental revenue request as presented in my testimony is
9 a direct result of numerous discussions with Mr. Tatum. I
10 will discuss the resulting methodology in detail in Section
11 III of my testimony.
12 Q. Did Mr. Tatum direct you to exclude any 2024
13 capital projects from the Company' s request in this case?
14 A. Yes . I was directed to exclude any expected
15 2024 capital projects associated with the Jim Bridger Power
16 Plant ("Bridger") and the North Valmy Generating Station
17 ("Valmy") from the incremental 2024 revenue requirement.
18 For each of these plants, Idaho Power currently has in
19 place separate rate mechanisms that utilize balancing
20 accounts and levelized revenue collection to smooth
21 recovery over the assets' remaining lives . Because of the
22 changing nature of operations at these facilities (i .e . ,
23 changing end-of-life assumptions and/or conversion to
24 natural gas) , Idaho Power intends to make a filing before
25 the Idaho Public Utilities Commission ("Commission") in the
LARKIN, DI 3
Idaho Power Company

1 coming months to update the mechanisms for both Bridger and
2 Valmy. Consequently, the Company has excluded 2024 Bridger
3 and Valmy investments from this case.
4 II . IDAHO RESULTS OF OPERATIONS
5 Q. What is the purpose of the ROO?
6 A. As detailed in Mr. Tatum' s testimony, the
7 purpose of the ROO is to demonstrate that existing rates
8 resulting from the settlement stipulation ("2023
9 Stipulation") approved in the Company' s most recently
10 completed general rate case, Case No. IPC-E-23-11 ("2023
11 GRC") , do not result in sufficient cost recovery given
12 expectations for 2024 . The ROO demonstrates that a rate
13 adjustment is needed to appropriately capture increasing
14 costs and ensure the Company remains financially healthy
15 and able to continue providing safe, reliable electric
16 service to customers .
17 Q. Please generally describe the methodology
18 utilized to develop the ROO.
19 A. The starting point for the ROO is actual 2023
20 year-end results . The Company then applied typical
21 ratemaking adjustments, such as the normalization of
22 revenues and the removal of non-rate case items such as
23 Energy Efficiency Rider ("Rider") funded expenses and
24 revenues, to develop adjusted year-end 2023 results
25 ("Adjusted 2023 Results") . Then, to provide a consistent
LARKIN, DI 4
Idaho Power Company

1 comparison with the results of the 2023 GRC, Idaho Power
2 applied certain ratemaking adjustments as contemplated in
3 the 2023 Stipulation to align the ROO with the
4 methodological results of that case. Finally, the Company
5 layered on incremental capital and 0&M Labor expectations
6 for 2024 to determine the sufficiency of current rates .
7 Q. Are you sponsoring any exhibits to support
8 your discussion of the ROO?
9 A. Yes . I am sponsoring two exhibits related to
10 the development of the ROO. Exhibit No. 5 provides a list
11 of adjustments made at each of the three steps utilized to
12 develop the ROO: 1) Adjusted 2023 Results, 2) 2023
13 Stipulation Adjustments, and 3) 2024 Incremental
14 Adjustments . Exhibit No. 6 contains the Excel model used to
15 calculate the ROO. Please note that Exhibit No. 6 contains
16 the summary results from the jurisdictional separation
17 study ("JSS") containing the results of this analysis; the
18 complete Excel model and supporting schedules are provided
19 as a comprehensive Excel file with formulas intact with my
20 workpapers accompanying this filing.
21 Adjusted 2023 Results
22 Q. How were the Adjusted 2023 Results developed?
23 A. To develop the Adjusted 2023 Results, Idaho
24 Power applied standard ratemaking adjustments to actual
25 year-end 2023 results .
LARKIN, DI 5
Idaho Power Company

1 Q. What standard ratemaking adjustments were
2 applied to rate base?
3 A. As further detailed in Exhibit No . 5, a number
4 of adjustments were made to rate base to reflect standard
5 Idaho ratemaking treatment . These adjustments include the
6 removal of typically non-allowable items such as
7 prepayments and non-land plant held for future use . In
8 addition, rate base associated with Bridger coal-related
9 investments and Valmy investments, including associated
10 accumulated depreciation, was removed as previously
11 discussed.
12 Q. What standard ratemaking adjustments were
13 applied to operating revenues?
14 A. Retail revenues were adjusted to reflect
15 weather normalized historical sales for 2023 including an
16 adjustment for revenues subject to the Sales Based
17 Adjustment. Federal Energy Regulatory Commission ("FERC")
18 Account 447, Sales for Resale, was set at 2013 base net
19 power supply expense ("NPSE") levels, as this was the
20 amount reflected in the Company' s base rates prior to the
21 implementation of the 2023 Stipulation effective January 1,
22 2024 . Rider revenues were removed, and Account 415 revenues
23 were added. Lastly, the Bridger and Valmy levelized revenue
24 requirement amounts were removed from retail revenues to
25 align with the corresponding removal of costs .
LARKIN, DI 6
Idaho Power Company

1 Q. What standard ratemaking adjustments were
2 applied to 0&M?
3 A. Standard expense adjustments were made that
4 reflect items typically excluded from rate proceedings in
5 Idaho, including image-related advertising, certain senior
6 management expenses, and certain purchasing card
7 transactions . In accordance with the previously described
8 treatment for Bridger and Valmy, non-fuel 0&M was removed
9 for these plants . In the same manner as Account 447, NPSE
10 accounts (501, 536, 547, 555, and 565) were all set to base
11 levels embedded in rates prior to the January 1, 2024,
12 tariff update resulting from the 2023 GRC. Rider-funded
13 expenses were removed to align with the treatment of Rider
14 revenues . Power cost deferrals were removed from Account
15 557 as these are out-of-period adjustments not reflected in
16 general rate filings . 0&M payroll was annualized and short-
17 term incentive was set to target levels for components
18 previously allowed for recovery from customers .
19 Q. What standard ratemaking adjustments were
20 applied to depreciation?
21 A. Depreciation expense was annualized for 2023
22 in accordance with the Company' s prior rate case practice .
23 Depreciation expense for Bridger coal-related investments
24 and Valmy investments was removed in accordance with the
LARKIN, DI 7
Idaho Power Company

1 treatment of other revenue requirement components related
2 to these plants .
3 Q. Were the remaining components of revenue
4 requirement adjusted in accordance with the other year-end
5 2023 adjustments you just described?
6 A. Yes . The remaining components of revenue
7 requirement, including Taxes Other Than Income Taxes and
8 Current Income Taxes, were all adjusted accordingly.
9 2023 Stipulation Adjustments
10 Q. Why did Idaho Power apply 2023 Stipulation
11 adjustments to the Adjusted 2023 Results?
12 A. As discussed previously, the intent of the ROO
13 is to evaluate if revenue through existing rates is
14 sufficient when taking into account growth in capital and
15 0&M Labor relative to the stipulated results of the 2023
16 GRC. To provide a consistent comparison between the outcome
17 of the 2023 GRC and the Company' s expectation for 2024,
18 certain adjustments were necessary to reflect ratemaking
19 treatment approved in the 2023 Stipulation.
20 Q. What items were adjusted to conform with the
21 2023 Stipulation?
22 A. To align the results of the ROO with the 2023
23 Stipulation, Idaho Power adjusted amounts related to
24 wildfire mitigation ("WM") , base NPSE, pension, Board of
25 Director ("BoD") costs, and retail revenues .
LARKIN, DI 8
Idaho Power Company

1 Q. How did Idaho Power apply the WM-related
2 provisions of the 2023 Stipulation to the Adjusted 2023
3 Results?
4 A. Idaho Power currently has in place a deferral
5 related to WM. To align with the 2023 Stipulation, Idaho
6 Power added to rate base the year-end 2023 WM deferral
7 balance. Additionally, an adjustment was made to set WM 0&M
8 at the approved levels in the 2023 GRC. Lastly, the Company
9 added the level of WM amortization expense approved through
10 the 2023 Stipulation.
11 Q. How did Idaho Power adjust base NPSE to align
12 with the 2023 Stipulation?
13 A. The 2023 Stipulation contained updated base
14 NPSE amounts for Accounts 447, 501, 536, 547, 555, and 565 .
15 Idaho Power updated the Adjusted 2023 Results to reflect
16 the new stipulated level of base NPSE.
17 Q. How did Idaho Power adjust pension
18 amortization?
19 A. Idaho Power adjusted pension amortization to
20 reflect the newly approved level contained in the 2023
21 Stipulation.
22 Q. How did Idaho Power adjust O&M for BoD costs?
23 A. In the 2023 Stipulation, Idaho Power agreed to
24 remove certain BoD-related compensation and expenses . The
LARKIN, DI 9
Idaho Power Company

1 Company removed the dollar amount associated with these
2 adjustments from 0&M.
3 Q. How did Idaho Power adjust retail revenues?
4 A. Retail rates reflecting the 2023 Stipulation
5 went into effect on January 1, 2024 . To appropriately
6 reflect this change, Idaho Power applied the newly approved
7 rates to normalized 2023 billing determinants .
8 Incremental 2024 Adjustments
9 Q. Why did Idaho Power layer on incremental 2024
10 adjustments in the final step of the R00?
11 A. The purpose of the R00 is to evaluate how well
12 the Company' s existing rates from the 2023 Stipulation
13 support its financial health in light of incremental
14 changes to capital and 0&M Labor in 2024 . Therefore, once
15 the Company adjusted year-end 2023 results for standard
16 ratemaking adjustments, then further modified these results
17 to align with the ratemaking treatment contemplated in the
18 2023 Stipulation, the final step in determining the
19 sufficiency of existing rates is to layer on increased
20 costs and revenues associated with capital and 0&M Labor in
21 2024 .
22 Q. What general methodology did Idaho Power
23 utilize to determine the incremental revenue requirement
24 related to incremental 2024 capital?
LARKIN, DI 10
Idaho Power Company

1 A. At a high level, Idaho Power estimated
2 incremental plant by comparing estimated year-end 2024
3 plant balances to amounts reflected in the 2023
4 Stipulation. Incremental accumulated depreciation and
5 amortization was set using a mid-year approach, and
6 depreciation expense was calculated by determining 12
7 months of expense based on year-end 2024 plant balances . I
8 will describe in detail the derivation of incremental
9 revenue requirement associated with 2024 capital
10 expenditures later in my testimony when I discuss the
11 calculation of the incremental revenue request in Section
12 III .
13 Q. What general methodology did Idaho Power
14 utilize to determine the incremental revenue requirement
15 related to incremental 0&M Labor?
16 A. At a high level, Idaho Power calculated
17 incremental 0&M Labor by comparing expected annualized 0&M
18 labor effective year-end 2024 to amounts reflected in the
19 2023 Stipulation. I will describe in detail the derivation
20 of incremental 0&M Labor later in my testimony when I
21 discuss the calculation of the incremental revenue request
22 in Section III .
23 Q. Was an adjustment to retail revenues necessary
24 as well?
LARKIN, DI 11
Idaho Power Company

1 A. Yes . In addition to cost growth in 2024, Idaho
2 Power expects to experience growth in retail sales as well .
3 Therefore, within the ROO an adjustment was made to reflect
4 incremental revenue collection associated with capital and
5 0&M Labor due to sales growth between the 2023 Stipulation
6 results and year-end 2024 . Similar to capital and O&M
7 Labor, I will expand on my explanation of this adjustment
8 later in my testimony.
9 ROO Results
10 Q. What are the results of the ROO after applying
11 the three sets of adjustments you just described?
12 A. After adjusting for standard ratemaking
13 treatment, aligning with the results of the 2023
14 Stipulation, and applying incremental capital and O&M
15 Labor, the results of the ROO indicate existing rates fall
16 short of revenues required to maintain the financial health
17 of Idaho Power. As shown in cell H47 of the "JSS - 2024
18 Increment" tab of Exhibit No. 6, the ROO indicates an
19 expected rate of return ("ROR") of 5 . 80 percent, which
20 reflects a return on equity ("ROE") of 6 . 7 percent . These
21 values are well below the Company' s currently authorized
22 ROR of 7 .247 percent and currently authorized ROE of 9 . 6
23 percent.
24 Q. Based on these results, is it necessary to
25 increase Idaho Power' s retail rates?
LARKIN, DI 12
Idaho Power Company

1 A. Yes . The 2024 incremental revenue request,
2 which I will discuss in detail in the next section of my
3 testimony, is justified and necessary given the results of
4 the ROO. Absent a rate increase, the expected rates of
5 return are insufficient to maintain the financial health of
6 Idaho Power as it continues to make significant levels of
7 investment in the electrical grid to ensure safe, reliable
8 service to customers .
9 III . DEVELOPMENT OF INCREMENTAL REVENUE REQUIREMENT REQUEST
10 Q. Is the development of the incremental revenue
11 requirement based on the analysis performed for the ROO?
12 A. No. The intent of the ROO is different from
13 the intent of the incremental revenue requirement
14 calculation, and therefore the underlying methodologies are
15 not the same . The intent of the ROO was to evaluate the
16 sufficiency of current rates as applied to 2024
17 expectations based on year-end 2023 results, while the
18 intent of the incremental revenue requirement request is to
19 determine the amount of incremental revenue necessary to
20 account for increases to capital and 0&M Labor between the
21 results of the 2023 Stipulation and expectations for 2024 .
22 While the two analyses share some inputs, it is important
23 to recognize that the determination of the incremental
24 revenue requirement was performed as a standalone analysis .
LARKIN, DI 13
Idaho Power Company

1 Q. What was Idaho Power' s general approach to
2 developing the incremental revenue requirement in this
3 case?
4 A. As discussed in Mr. Tatum' s testimony, the
5 Company' s revenue request reflects the revenue requirement
6 associated with incremental 2024 capital and O&M Labor
7 relative to amounts approved for recovery in the 2023
8 Stipulation. To determine the rate increase requested in
9 this case, the Company computed the revenue requirement on
10 these isolated components .
11 Determination of Incremental 2024 Capital
12 Q. How did Idaho Power determine incremental 2024
13 capital?
14 A. The starting point for incremental 2024
15 capital is year-end 2023 actual plant balances . The
16 December 31, 2023, actual plant balances were adjusted to
17 remove Bridger coal-related amounts, all Valmy plant and
18 remaining plant from the Boardman power plant ("Boardman") .
19 The Company then estimated 2024 capital closings utilizing
20 the same general method applied in the 2023 GRC (i .e . , by
21 bifurcating expected plant closings into projects above and
22 below $8 million) , then applying different methodologies to
23 each category.
24 Q. How did Idaho Power determine 2024 plant
25 closings for projects greater than $8 million?
LARKIN, DI 14
Idaho Power Company

1 A. Idaho Power estimates that eight projects over
2 $8 million will close in 2024 . For each of these projects,
3 the Company began with year-end 2023 construction work-in-
4 process ("CWIP") , then developed a forecasted close amount
5 and timing by project with the respective business unit
6 managers . Each of these eight projects is discussed in
7 detail throughout the Direct Testimonies of Company
8 Witnesses Mr. Eric Hackett and Mr. Mitch Colburn.
9 Q. How did Idaho Power determine 2024 plant
10 closings for projects less than $8 million?
11 A. For projects less than $8 million, Idaho Power
12 first calculated a five-year average of the ratio between
13 the previous year' s CWIP balance and the percent of project
14 closings in the subsequent year. This ratio was then
15 applied to the year-end 2023 CWIP balance to determine
16 estimated 2024 closings . These closings were then spread to
17 FERC accounts based on a five-year history of plant
18 closings from 2019 through 2023 .
19 Q. Do Idaho Power' s estimated 2024 plant levels
20 account for retirements?
21 A. Yes . For the majority of FERC accounts, Idaho
22 Power estimated 2024 retirements using a five-year average
23 for the time period 2019 through 2023 . Accounts 302, 303,
24 391, 393, 394, 395, 397, and 398 have known retirement
LARKIN, DI 15
Idaho Power Company

1 dates and amounts based on vintage layers and therefore
2 estimates were not necessary.
3 Q. How did Idaho Power calculate accumulated
4 depreciation related to 2024 plant balances?
5 A. Accumulated depreciation was determined based
6 on a mid-year convention. The 2024 forecast was developed
7 by first determining the actual year-end 2023 balance and
8 then building upon that to determine the 2024 monthly
9 balances . The December 31, 2023, actual accumulated
10 depreciation reserve balance was adjusted to remove Bridger
11 coal-related accumulated depreciation, and all Valmy
12 accumulated depreciation. Land does not depreciate so there
13 was no adjustment for Boardman. The mid-year average was
14 determined by adding the adjusted December 2023 balance and
15 the forecasted December 2024 balance and dividing the total
16 by two .
17 Q. How did Idaho Power calculate expected
18 depreciation expense?
19 A. To determine expected depreciation expense,
20 Idaho Power applied annual depreciation rates approved in
21 Commission Order No. 35272' to expected plant balances at
22 month-end December 2024 to determine a full year of
23 depreciation expense.
1 In the Matter of Idaho Power Company's Application for Authority to
Increase its Rates Due to Revised Depreciation Rates for Electric
Plant-In-Service, Case No. IPC-E-21-18.
LARKIN, DI 16
Idaho Power Company

1 Q. How did the Company calculate incremental
2 capital utilized in the revenue requirement computation
3 once it had calculated expected 2024 values?
4 A. Once the Company determined expected 2024
5 values, an account-by-account comparison was performed
6 relative to approved capital components from the 2023
7 Stipulation. Exhibit No. 7 presents this account-by-account
8 comparison utilized to determine the incremental revenue
9 requirement components related to 2024 plant.
10 Q. What are the results of the analysis as
11 presented in Exhibit No. 7?
12 A. The analysis presented in Exhibit No . 7 shows
13 the composition of the approximately $860 million in
14 incremental 2024 plant by FERC account. Column C contains
15 plant amounts reflected in the 2023 Stipulation, while
16 Column D provides expected 2024 plant levels calculated in
17 accordance with the methodology I just described. A
18 complete Excel file containing supporting schedules with
19 formulas intact is included in my workpapers accompanying
20 this filing.
21 Determination of Incremental 2024 O&M Labor
22 Q. What components of labor are reflected in the
23 Company' s incremental revenue request?
24 A. The incremental revenue request only includes
25 0&M Labor related to wages and salaries, including
LARKIN, DI 17
Idaho Power Company

1 benefits, loadings, and short-term incentive for non-
2 officers . All other components of labor and benefits are
3 excluded from the determination of incremental labor costs
4 in this case.
5 Q. How did Idaho Power calculate expected 2024
6 0&M Labor?
7 A. Expected 2024 0&M Labor was calculated
8 utilizing the same general methodology applied in the
9 Company' s 2023 GRC. First, the Company developed a three-
10 year history of the ratio between February year-to-date 0&M
11 Labor expenses and full year 0&M Labor expenses . This ratio
12 was then applied to month-end February 2024 year-to-date
13 0&M Labor to determine the expectation of full year 2024
14 0&M Labor expenses . An annualizing adjustment was then
15 applied based on year-end 2023 levels, and a 2025 general
16 wage adjustment ("GWA") of 3 percent was added.
17 Q. How was the 2024 expectation determined for
18 short-term incentive?
19 A. In line with prior filings, Idaho Power
20 adjusted the short-term incentive to reflect target levels
21 for just the Customer Satisfaction and Reliability
22 components for non-officers .
23 Q. How did Idaho Power determine the incremental
24 labor request based on the expectation of 2024 O&M Labor?
LARKIN, DI 18
Idaho Power Company

1 A. Expected 2024 O&M Labor amounts were compared
2 to 0&M Labor reflected in the 2023 Stipulation. To isolate
3 wages and salaries, a number of adjustments were required
4 to ensure that other components of labor expense were not
5 included in the incremental revenue requirement developed
6 in this case. This includes an adjustment to remove the
7 impact of the mid-year 2022 GWA that was excluded from
8 revenue requirement as part of the 2023 Stipulation.
9 Q. Are you sponsoring an exhibit that details the
10 comparison of 2024 0&M Labor to the stipulated results of
11 the 2023 GRC?
12 A. Yes . Exhibit No. 8 steps through the
13 determination of incremental revenue requirement related to
14 2024 0&M Labor.
15 Q. What are the results of the analysis presented
16 in Exhibit No. 8?
17 A. Exhibit No. 8 details how the system
18 incremental labor in the amount of $19, 557, 535 was
19 determined. This value can be found in cell E88 of Exhibit
20 No . 8 .
21 Determination of Incremental Revenue Requirement
22 Q. Once incremental capital and O&M Labor were
23 determined, how did Idaho Power calculate the ultimate rate
24 increase requested in this case?
LARKIN, DI 19
Idaho Power Company

1 A. Once the incremental revenue requirement
2 components were determined by FERC account, Idaho Power
3 applied the jurisdictional allocation factors from the JSS
4 from the 2023 Stipulation to determine the Idaho
5 jurisdictional portion of each revenue requirement
6 component.
7 Q. Were any other adjustments required to
8 calculate the appropriate revenue increase requested in
9 this case?
10 A. Yes . Because the rate increase requested in
11 this case is intended to update the results of the 2023 GRC
12 for two specific components of revenue requirement,
13 increased revenue collection due to sales growth between
14 the 2023 Stipulation and 2024 must be considered as well,
15 serving as an offset to the increase in costs contemplated
16 in this case.
17 Q. How did Idaho Power determine the appropriate
18 level of revenue growth to apply as an offset?
19 A. Exhibit No. 9 walks through the calculation of
20 the revenue growth offset applied in this case . First,
21 Idaho Power determined an estimated cents-per-kilowatt-hour
22 ("kWh") rate of cost recovery for capital-related items and
23 0&M Labor that is currently embedded in retail rates as a
24 result of the 2023 GRC. Then, the Company determined the
25 estimated kWh sales growth between the stipulated results
LARKIN, DI 20
Idaho Power Company

1 of the 2023 GRC and 2024 . The cents-per-kWh rate was
2 applied to the kWh sales growth to determine the estimated
3 increase in recovery related to capital and O&M Labor. As
4 shown in cell A14, the revenue growth offset applied in
5 this case is $5 . 5 million.
6 Q. What is the Company' s requested rate increase
7 after taking into account incremental capital and 0&M
8 Labor, offset by incremental revenue collection?
9 A. Exhibit No. 10 details the results of the
10 incremental revenue requirement quantification. The system
11 incremental revenue requirement by FERC account is
12 presented in Column F, while the Idaho-allocated portion is
13 presented in Column G. The revenue growth offset of $5 . 5
14 million is applied in cell G45 . As shown in cell G43, the
15 Company' s requested increase in this case is $99 . 3 million,
16 or 7 . 31 percent.
17 Q. In the 2023 Stipulation, the Commission
18 authorized Idaho Power to utilize Investment Tax Credits
19 ("ITC") to offset the revenue requirement associated with
20 battery projects expected to come online in the 2023 GRC
21 test year ("2023 Battery Projects") . Is Idaho Power
22 proposing to modify that treatment in this case?
23 A. No. Embedded in Idaho Power' s existing rates
24 is a reduction equivalent to the revenue requirement of the
25 2023 Battery Projects . The incremental revenue requirement
LARKIN, DI 21
Idaho Power Company

1 calculation in this case has no impact on this existing
2 revenue requirement reduction. In other words, the proposed
3 rates effective January 1, 2025, would maintain the
4 stipulated offset to the 2023 Battery Projects revenue
5 requirement that currently exists today.
6 IV. CONCLUSION
7 Q. Please summarize your testimony.
8 A. Idaho Power performed an ROO to determine the
9 ability of existing rates to maintain the financial health
10 of the Company as it continues to make significant
11 investment in the safe, reliable operation of the
12 electrical grid. This analysis began with year-end 2023
13 results, then applied standard ratemaking adjustments,
14 changes related to the 2023 Stipulation, and expected 2024
15 costs, ultimately demonstrating that current rates are
16 insufficient to support the Company' s operations while
17 maintaining its financial health.
18 Given the results of the ROO, the Company calculated
19 an incremental rate increase based on expected capital
20 expenditures and 0&M Labor costs in 2024, updating the
21 results of the 2023 Stipulation for these two revenue
22 requirement components . The resulting analysis determined
23 that an increase to current revenues of $99 . 3 million, or
24 7 . 31 percent, is necessary to ensure timely cost recovery
LARKIN, DI 22
Idaho Power Company

1 and provide the Company with the necessary financial
2 stability.
3 Q. Would approval of the requested rate increase
4 result in fair, just, and reasonable rates?
5 A. Yes . The Company' s proposed methodology in
6 this case would provide rate relief that is commensurate
7 with the ongoing needs of the system, appropriately
8 balancing affordability with the investment required to
9 build, operate, and maintain a safe and reliable electrical
10 grid.
11 Q. Does this conclude your direct testimony in
12 this case?
13 A. Yes, it does .
14
15
16
LARKIN, DI 23
Idaho Power Company

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BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION
CASE NO. IPC-E-24-07
IDAHO POWER COMPANY
LARKIN , DI
TESTIMONY
EXHIBIT NO. 5

Exhibit No. 5
Results of Operations Adjustment Summary
Idaho Power Company — IPC-E-24-07
The following document summarizes adjustments made to year-end 2023 actuals to complete
the Idaho Results of Operations ("ROO") analysis. The adjustments are applied in three
sequential steps:
1) 2023 Ratemaking Adjustments;
2) 2023 Stipulation Adjustments; and
3) 2024 Incremental Adjustments.
The adjustments in this document correspond to the analysis results presented in Exhibit No. 6:
Results of Operations.xlsx. The complete Excel model and supporting schedules are provided
as a comprehensive Excel file with formulas intact in Mr. Larkin's workpapers accompanying
this filing. The final results of the ROO as contained in Exhibit No. 6 can be found in the
comprehensive workpaper model on the "JSS —2024 Increment" tab.' For ease of reference,
when possible, the adjustments are delineated by the corresponding table in the respective
jurisdictional separation study ("JSS") tabs (e.g., Table 1 — Electric Plant in Service).
Step 1 : 2023 Ratemakinq Adjustments
Standard ratemaking adjustments are applied to year-end 2023 results to capture typical
regulatory treatment of revenue requirement components, including the normalization of
revenues and the removal of non-rate case items such as Energy Efficiency Rider ("Rider")
expenses and revenues, to develop the Adjusted 2023 Results.
General Adjustments
• Removed Jim Bridger Power Plant ("Bridger") and North Valmy Generating Station
("Valmy") components from 2023 actuals. This flows through to each subsequent step in
the analysis.
• Added construction work-in-process ("CWIP") for Hells Canyon Complex ("HCC")
relicensing into the computation of the revenue deficiency to account for currently
authorized collection of HCC allowance-for-funds-used-during-construction.
• Set Idaho Energy Resources Company ("IERCo") operating income to the December 31,
2023 balance.
• Demand and energy jurisdictional allocations reflect normalized 2023 data.
Table 1 — Electric Plant in Service CEPIS")
• Removed Bridger Coal and Val my Plant (1 3-monthaverage).
1 Please note the "2023 Stipulation Adjustments" and the "2024 Incremental Adjustments"were applied
within the same tab of the model, therefore there is not a separate tab that isolates the results of Step 2
prior to applying the 2024 Incremental Adjustments detailed in Step 3.
Exhibit No.5
Case No. IPC-E-24-07
M.Larkin, IPC
Page 1 of 4

Table 2 —Accumulated Depreciation and Amortization
• Removed Bridger Coal and Valmy 13-month average and associated annualizing
adjustment.
• Applied annualizing adjustment that includes a reserve adjustment equal to one-half of
the depreciation expense annualizing adjustment.
Table 3— Other Rate Base Items
• Account 282: Adjusted based on adjustments to plant, as well as an adjustment for
Bridger and Valmy deferred tax to ensure the reduction flows through appropriately.
• Fuel Inventory: Adjusted to reflect required fuel inventory per general rate case ("GRC")
methodology.
• Removed prepayments.
• Adjusted Plant Held for Future Use to only reflect Land Held for Future Use.
• Added Accounts 114/115.
Table 4 — Operating Revenues
• Normalized 2023 retail revenues.
o Removed levelized Bridger and Valmy revenue requirement.
o Removed revenues subject to Sales Based Adjustment.
• Account 447 revenues set at 2013 base net power supply expense ("NPSE") levels to
match amounts reflected in 2023 retail rates/2023 normalized revenues.
• Removed Account 456: Rider revenues.
• Added Account 415.
Table 5— Operations and Maintenance Expense ("O&M")
• Typical GRC O&M deductions include general advertising expenses, certain
memberships and contributions, senior management expenses, and miscellaneous other
expenses as detailed below:
o Advertising (Account 930.1)
o Senior management expenses (Account 930.2)
o Miscellaneous expenses (Purchasing Card charges) (Account 930.2)
o Certain memberships and contributions (Account 930.2)
• Other adjustments to O&M:
o Removed Account 908: Rider Funded Expenses.
o Removed 2023 actual Bridger and Valmy O&M.
o NPSE Accounts (501, 536, 547, 555 & 565): set at 2013 base levels to match
amounts reflected in 2023 retail rates/ 2023 normalized revenues.
o Account 557: Removed Power Cost Adjustment deferrals.
o Account 920: Adjusted short-term incentive to reflect target levels for Customer
Satisfaction and Reliability.
o Added GRC payroll annualizing adjustment.
o Added Account 416.
Exhibit No.5
Case No. IPC-E-24-07
M.Larkin, IPC
Page 2 of 4

Table 6 — Depreciation/Amortization Expense
• Annualized per typical GRC methodology.
• Removed Bridger coal and Valmy depreciation expense.
• Removed 411.8.
Table 7—Taxes Other Than Income Taxes
• Removed Federal Insurance Contribution Act ("FICA"), Federal Unemployment Tax Act
("FUTA"), Payroll, and Unemployment taxes.
• Normalized Hydro Generation kilowatt-hour ("kWh") tax.
Tables 9-12 — Current Income Taxes
• Adjustments calculated on a system basis to align with other adjustments detailed
above.
• Adjusted taxes to reflect Bridger and Valmy removal.
Step 2: 2023 Stipulation Adjustments
Table 3— Other Rate Base Items
• Added Wildfire mitigation deferral year-end 2023 balance.
Table 4 — Operating Revenues
• Adjusted retail revenues to reflect January 1, 2024, rates applied to 2023 normalized
billing determinants.
o Removed levelized Bridger and Valmy revenue requirement.
• Account 447 revenues set at new 2023 base NPSE level approved in 2023 General
Rate Case, IPC-E-23-11 ("2023 GRC').
Table 5— O&M
• Adjusted Board of Directors ("BoD") costs to align with treatment from 2023 Stipulation.
• NPSE Accounts 501, 536, 547, 555, and 565 set at new base approved in 2023 GRC.
• Wildfire mitigation O&M set at new level approved in 2023 GRC.
• Idaho pension amortization set at new level approved in 2023 GRC.
Table 8— Regulatory Debits and Credits
• Added wildfire mitigation amortization as approved in 2023 GRC.
Exhibit No.5
Case No. IPC-E-24-07
M. Larkin, IPC
Page 3 of 4

Step 3: 2024 Incremental Adjustments
Table 1 — EPIS
• Added incremental 2024 plant.
Table 2 —Accumulated Depreciation and Amortization
• Added mid-year incremental Depreciation and Amortization for incremental plant.
Table 3— Other Rate Base Items
• Account 282: Adjusted to reflect ending balance for incremental plant additions.
Table 4 — Operating Revenues
• Added incremental revenue due to sales growth associated with plant and O&M labor
embedded in rates approved in the 2023 GRC.
Table 5— O&M
• Added incremental labor expenses.
Table 6— Depreciation/Amortization Expense
• Annualized depreciation expense based on year-end 2024 balances.
Tables 9-12 —Current Income Taxes
• Adjusted tax for incremental 2024 plant.
Exhibit No.5
Case No. IPC-E-24-07
M. Larkin, IPC
Page 4 of 4

BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION
CASE NO. IPC-E-24-07
IDAHO POWER COMPANY
LARKIN , DI
TESTIMONY
EXHIBIT NO. 6

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
9''"SUMMARY OF RESULTS'"
10
11 DEVELOPMENT OF RATE BASE COMPONENTS
12
13 ELECTRIC PLANT IN SERVICE 7,098,961,062 6,797,524,777 301,436,285
14 LESS:ACCUM PROVISION FOR DEPRECIATION 2,190,309,473 2,096,603,554 93,705,920
15 AMORT OF OTHER UTILITY PLANT 47,594,769 45,681,683 1,913,086
16 NET ELECTRIC PLANT IN SERVICE 4,861,056,819 4,655,239,540 205,817,279
17 LESS:CUSTOMER ADV FOR CONSTRUCTION 32,170,424 32,110,363 60,062
18 LESS:A000M DEFERRED INCOME TAXES 387,672,810 371,048,649 16,624,160
19 ADD:PLT HLD FOR FUTURE+ACQUIS ADJ 628,247 628,247 -
20 ADD:WORKING CAPITAL 139,484,205 133,445,511 6,038,694
21 ADD:CONSERVATION+OTHERDFRDFROG. 51,563,314 46,360,137 5,203,177
22 ADD:SUBSIDIARY RATE BASE 36,192,061 34,665,124 1,526,937
23
24 TOTAL COMBINED RATE BASE 4,669,081,412 4,467,179,547 201,901,865
25
26 RATE OF RETURN UNDER PRESENT RATES
27 OPERATING REVENUES
28 SALES REVENUES 1,312,879,048 1,257,826,285 55,052,763
29 OTHER OPERATING REVENUES 90,445,486 86,982,202 3,463,284
30 TOTAL OPERATING REVENUES 1,403,324,534 1,344,808,487 58,516,046
31 OPERATING EXPENSES
32 OPERATION&MAINTENANCE EXPENSES 934,441,471 893,018,187 41,423,284
33 DEPRECIATION EXPENSE 174,034,269 166,800,152 7,234,117
34 AMORTIZATION OF LIMITED TERM PLANT 8,949,407 8,584,623 364,784
35 ACCRETION EXPENSE 12,995 12,485 509
36 TAXES OTHER THAN INCOME 25,554,161 23,444,410 2,109,751
37 REGULATORY DEBITS/CREDITS 5,657,329 5,339,621 317,709
38 PROVISION FOR DEFERRED INCOME TAXES (15,424,032) (14,807,844) (616,189)
39 INVESTMENT TAX CREDIT ADJUSTMENT 124,171,136 118,895,080 5,276,056
40 FEDERAL INCOME TAXES (101,137,048) (97,803,208) (3,333,840)
41 STATE INCOME TAXES (10,554,538) (10,146,359) (408,178)
42 TOTAL OPERATING EXPENSES 1,145,705,150 1,093,337,148 52,368,003
43 OPERATING INCOME 257,619,383 251,471,339 6,148,044
44 ADD: IER00 OPERATING INCOME Eio 8,033,987 7,695,035 338,953
45 CONSOLIDATED OPERATING INCOME 265,653,371 259,166,374 6,486,997
46
47 RATE OF RETURN UNDER PRESENT RATES 5.69% 5.80% 3.21%
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 1 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
48*"'SUMMARY OF RESULTS***
49
50 RATE OF RETURN UNDER PRESENT RATES
51 TOTAL COMBINED RATE BASE 4,669,081,412 4,467,179,547 201,901,865
52
53 SALES REVENUES 1,312,879,048 1,257,826,285 55,052,763
54 OTHER OPERATING REVENUES 90,445,486 86,982,202 3,463,284
55 TOTAL OPERATING REVENUES 1,403,324,534 1,344,808,487 58,516,046
56 OPERATING EXPENSES
57 OPERATION&MAINTENANCE EXPENSES 934,441,471 893,018,187 41,423,284
58 DEPRECIATION EXPENSE 174,034,269 166,800,152 7,234,117
59 AMORTIZATION OF LIMITED TERM PLANT 8,949,407 8,584,623 364,784
60 ACCRETION EXPENSE 12,995 12,485 509
61 TAXES OTHER THAN INCOME 25,554,161 23,444,410 2,109,751
62 REGULATORY DEBITS/CREDITS 5,657,329 5,339,621 317,709
63 PROVISION FOR DEFERRED INCOME TAXES (15,424,032) (14,807,844) (616,189)
64 INVESTMENT TAX CREDIT ADJUSTMENT 124,171,136 118,895,080 5,276,056
65 FEDERAL INCOME TAXES (101,137,048) (97,803,208) (3,333,840)
66 STATE INCOME TAXES (10,554,538) (10,146,359) (408,178)
67 TOTAL OPERATING EXPENSES 1,145,705,150 1,093,337,148 52,368,003
68 OPERATING INCOME 257,619,383 251,471,339 6,148,044
69 ADD: IER00 OPERATING INCOME 8,033,987 7,695,035 338,953
70 CONSOLIDATED OPERATING INCOME 265,653,371 259,166,374 6,486,997
71 RATE OF RETURN UNDER PRESENT RATES 5.69% 5.80% 3.21%
72
73 DEVELOPMENT OF REVENUE REQUIREMENTS
74 RATE OF RETURN REQUIRED(BASED ON 10%ROE) 7.247% 7.247% 7.247%
75
76 RETURN AT CLAIMED RATE OF RETURN 338,368,330 323,736,502 14,631,828
77 EARNINGS DEFICIENCY 72,714,959 64,570,128 8,144,832
78 ADD:CWIP(RELICENSING) 6,815,472 6,520,122 295,350
79 DEFICIENCY WITH CWIP 79,530,431 71,090,250 8,440,182
80
81 NET-TO-GROSS TAX MULTIPLIER 1.347 1.347 1.347
82
83 REVENUE DEFICIENCY 107,127,491 95,758,566 11,368,925
84
85 FIRM JURISDICTIONAL REVENUES 1,283,843,868 1,230,016,095 53,827,773
86
87 PERCENT INCREASE REQUIRED 8.34% 7.79% 21.12%
88
89 SALES AND WHEELING REVENUES REQUIRED 1,390,971,359 1,325,774,661 65,196,698
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 2 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
90***TABLE 1-ELECTRIC PLANT IN SERVICE
91
92 INTANGIBLE PLANT
93 301-ORGANIZATION P1o1P 5,703 5,461 242
94 302-FRANCHISES&CONSENTS Dio 67,301,183 64,641,493 2,659,690
95303-MISCELLANEOUS P1o1P 77,770,770 74,466,275 3,304,495
96
97 TOTAL INTANGIBLE PLANT 145,077,656 139,113,229 5,964,428
98
99 PRODUCTION PLANT
100310-316/STEAM PRODUCTION D10 297,714,102 285,948,673 11,765,429
101330-336/HYDRAULIC PRODUCTION D10 1,211,835,338 1,163,944,550 47,890,789
102 340-346/OTHER PRODUCTION-LANGLEY D10 415,522,763 399,101,627 16,421,136
103 340-346/OTHER PRODUCTION-DANSKIN/BENNETT MTN D70 202,289,103 194,294,795 7,994,308
104
105 TOTAL PRODUCTION PLANT 2,127,361,308 2,043,289,646 84,071,662
106
107 TRANSMISSION PLANT
108 350/LAND&LAND RIGHTS
109 SYSTEM TRANSMISSION SERVICE D11 45,123,558 43,340,310 1,783,248
110 DIRECT ASSIGNMENT DA350 - - -
III TOTAL ACCOUNT350 45,123,558 43,340,310 1,783,248
112
113 352/STRUCTURES&IMPROVEMENTS
114 SYSTEM TRANSMISSION SERVICE D11 110,977,804 106,592,048 4,385,756
115 DIRECT ASSIGNMENT DA352 658 - 658
116 TOTAL ACCOUNT 352 110,978,462 106,592,048 4,386,415
117
118 353/STATION EQUIPMENT
119 SYSTEM TRANSMISSION SERVICE DII 509,721,302 489,577,513 20,143,789
120 DIRECT ASSIGNMENT DA353 111,594 75,100 36,494
121 TOTAL ACCOUNT 353 509,832,896 489,652,613 20,180,283
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 3 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
122—TABLE TABLE 1-ELECTRIC PLANT IN SERVICE"*"
123
124 3541 TOWERS&FIXTURES
125 SYSTEM TRANSMISSION SERVICE Dii 249,756,890 239,886,692 9,870,198
126 DIRECT ASSIGNMENT DA354 - - -
127 TOTAL ACCOUNT 354 249,756,890 239,886,692 9,870,198
128
129 355/POLES&FIXTURES
130 SYSTEM TRANSMISSION SERVICE oil 271,451,233 260,723,692 10,727,541
131 DIRECT ASSIGNMENT DA355 33,842 - 33,842
132 TOTAL ACCOUNT 355 271,485,075 260,723,692 10,761,383
133
134 356/OVERHEAD CONDUCTORS&DEVICES
135 SYSTEM TRANSMISSION SERVICE D11 290,260,290 278,789,429 11,470,861
136 DIRECT ASSIGNMENT DA356 26,495 1,189 25,306
137 TOTAL ACCOUNT 356 290,286,785 278,790,618 11,496,167
138
139 359/ROADS&TRAILS
140 SYSTEM TRANSMISSION SERVICE D11 406,231 390,177 16,054
141 DIRECT ASSIGNMENT DA359 - - -
142 TOTAL ACCOUNT 359 406,231 390,177 16,054
143
144 TOTAL TRANSMISSION PLANT 1,477,869,896 1,419,376,150 58,493,747
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 4 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
145***TABLE 1-ELECTRIC PLANT IN SERVICE
146
147 DISTRIBUTION PLANT
148
149 360/LAND&LAND RIGHTS ACCT360 9,815,237 9,399,050 416,188
150 361/STRUCTURES&IMPROVEMENTS ACCT361 73,809,666 70,595,724 3,213,942
151 362/STATION EQUIPMENT ACCT362 361,390,672 346,674,746 14,715,926
152363/BATTERY STORAGE D70 307,577,615 295,422,387 12,155,228
153 364/POLES,TOWERS&FIXTURES DA364 366,804,146 338,067,715 28,736,431
154365/OVERHEAD CONDUCTORS&DEVICES DA365 172,940,993 163,251,293 9,689,700
155 366/UNDERGROUND CONDUIT DA366 62,328,189 61,327,088 1,001,101
156 367/UNDERGROUND CONDUCTORS&DEVICES DA367 385,071,509 379,263,738 5,807,772
157368/LINE TRANSFORMERS ACCT368 824,478,027 779,265,187 45,212,840
158 369/SERVICES DA369 74,883,706 71,799,683 3,084,023
159 370/METERS ACCT370 124,776,385 120,955,838 3,820,547
160 371/INSTALLATIONS ON CUSTOMER PREMISES DA371 6,504,019 6,077,640 426,379
161 373/STREET LIGHTING SYSTEMS DA373 7,620,938 7,241,643 379,296
162
163 TOTAL DISTRIBUTION PLANT 2,778,001,103 2,649,341,730 128,659,372
164
165 GENERAL PLANT
166 389/LAND&LAND RIGHTS PTD 21,145,439 20,246,965 898,474
167 390/STRUCTURES&IMPROVEMENTS PTD 178,056,002 170,490,368 7,565,634
168 391/OFFICE FURNITURE&EQUIPMENT PTD 46,142,473 44,181,870 1,960,603
169 392/TRANSPORTATION EQUIPMENT PTD 149,671,758 143,312,176 6,359,582
170 393/STORES EQUIPMENT PTD 9,276,437 8,882,279 394,158
171 394/TOOLS,SHOP&GARAGE EQUIPMENT PTD 16,531,852 15,829,411 702,442
172 395/LABORATORY EQUIPMENT PTD 17,688,809 16,937,208 751,601
173 396/POWER OPERATED EQUIPMENT PTD 32,527,731 31,145,621 1,382,110
174 397/COMMUNICATIONS EQUIPMENT PTD 88,540,127 84,778,040 3,762,087
175 398/MISCELLANEOUS EQUIPMENT PTD 11,070,472 10,600,085 470,386
176
177 TOTAL GENERAL PLANT 570,651,099 546,404,023 24,247,076
178
179 TOTAL ELECTRIC PLANT IN SERVICE 7,098,961,062 6,797,524,777 301,436,285
180
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 5 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
181 ***TABLE 2-ACCUMULATED PROVISION FOR DEPRECIATION*
182
183 PRODUCTION PLANT
184 310-316/STEAM PRODUCTION L 100 192,595,403 184,984,183 7,611,220
185 330-336/HYDRAULIC PRODUCTION L101 536,257,268 515,064,799 21,192,470
186 340-346/OTHER PRODUCTION-LANGLEY L102 86,016,347 82,617,048 3,399,299
187 340-346/OTHER PRODUCTION-DANSKIN/BENNETT MTN L103 64,781,409 62,221,298 2,560,111
188 TOTAL PRODUCTION PLANT 879,650,427 844,887,327 34,763,100
189
190 TRANSMISSION PLANT
191 350/LAND&LAND RIGHTS L 111 10,640,184 10,219,692 420,492
192 352/STRUCTURES&IMPROVEMENTS L116 35,178,162 33,787,748 1,390,414
193 353/STATION EQUIPMENT L 121 125,602,861 120,631,230 4,971,631
194 354/TOWERS&FIXTURES L 127 82,555,492 79,292,963 3,262,529
195355/POLES&FIXTURES L132 81,819,694 78,576,448 3,243,247
196356/OVERHEAD CONDUCTORS&DEVICES L137 89,515,586 85,970,519 3,545,067
197359/ROADS&TRAILS L142 300,145 288,284 11,861
198 TOTAL TRANSMISSION PLANT 425,612,124 408,766,883 16,845,241
199
200 DISTRIBUTION PLANT
201 360/LAND&LAND RIGHTS L 149 267,036 255,713 11,323
202 361/STRUCTURES&IMPROVEMENTS L150 17,597,451 16,831,194 766,257
203 362/STATION EQUIPMENT L 151 76,945,502 73,812,260 3,133,242
204363/BATTERY STORAGE L152 7,339,093 7,049,058 290,035
205 364/POLES,TOWERS&FIXTURES L 153 148,616,411 136,973,399 11,643,013
206365/OVERHEAD CONDUCTORS&DEVICES L154 59,437,082 56,106,885 3,330,196
207 366/UNDERGROUND CONDUIT L 155 19,957,781 19,637,224 320,557
208 367/UNDERGROUND CONDUCTORS&DEVICES L 156 109,843,417 108,186,724 1,656,694
209 368/LINE TRANSFORMERS L 157 206,097,998 194,795,968 11,302,031
210 369/SERVICES L 158 46,522,754 44,606,753 1,916,001
211 370/METERS L 159 40,491,460 39,251,646 1,239,814
212 371/INSTALLATIONS ON CUSTOMER PREMISES L160 1,018,383 951,621 66,761
213373/STREET LIGHTING SYSTEMS L161 1,852,662 1,760,454 92,207
214 TOTAL DISTRIBUTION PLANT 735,987,029 700,218,898 35,768,131
215
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 6 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
216***TABLE 2-ACCUMULATED PROVISION FOR DEPRECIATION`
217
218 GENERAL PLANT
219 389/LAND&LAND RIGHTS L 166 - - -
220390/STRUCTURES&IMPROVEMENTS L167 37,467,073 35,875,090 1,591,983
221 391/OFFICE FURNITURE&EQUIPMENT L 168 19,565,369 18,734,033 831,336
222 392/TRANSPORTATION EQUIPMENT L 169 27,046,555 25,897,341 1,149,213
223 393/STORES EQUIPMENT L 170 1,688,739 1,616,985 71,755
224 394/TOOLS,SHOP&GARAGE EQUIPMENT L171 5,388,701 5,159,734 228,967
225 395/LABORATORY EQUIPMENT L172 7,306,941 6,996,467 310,473
226 396/POWER OPERATED EQUIPMENT L173 6,817,185 6,527,521 289,664
227 397/COMMUNICATIONS EQUIPMENT L 174 36,291,244 34,749,222 1,542,022
228 398/MISCELLANEOUS EQUIPMENT L 175 4,486,993 4,296,340 190,653
229 TOTAL GENERAL PLANT 146,058,799 139,852,732 6,206,067
230
231 UNDER-/OVERALLOCATED SALVAGE L 97 - - -
232 TOTAL DEPR BEFORE FAS143/OTHER 2,187,308,379 2,093,725,841 93,582,539
233
234 FAS 143ADJ&/OR DISALLOWED COSTS L 97 3,001,094 2,877,713 123,381
235 TOTAL ACCUM PROVISION DEPRECIATION 2,190,309,473 2,096,603,554 93,705,920
236
237 AMORTIZATION OF OTHER UTILITY PLANT
238 INTANGIBLE PLANT L 97 20,202,730 19,372,156 830,574
239 HYDRAULIC PRODUCTION L101 27,392,039 26,309,527 1,082,512
240
241 TOTAL AMORT OF OTHER UTILITY PLANT 47,594,769 45,681,683 1,913,086
242
243 TOTAL ACCUM PROVISION FOR DEPR
244 &AMORTIZATION OF OTHER UTILITY PLANT 2,237,904,242 2,142,285,237 95,619,006
245
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 7 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
246"`TABLE 3-ADDITIONS&DELETIONS TO RATE BASE'"
247
248 NET ELECTRIC PLANT IN SERVICE 4,861,056,819 4,655,239,540 205,817,279
249 LESS:
250 252 CUSTOMER ADVANCES FOR CONSTRUCTION
251 POWER SUPPLY D10 - - -
252 OTHER DA252 32,170,424 32,110,363 60,062
253 TOTAL CUSTOMER ADV FOR CONSTRUCTION 32,170,424 32,110,363 60,062
254
255 ACCUMULATED DEFERRED INCOME TAXES
256 190/ACCUMULATED DEFERRED INCOME TAXES
257 CUSTOMER ADVANCES FOR CONSTRUCTION DA252 (3,854,109) (3,846,913) (7,196)
258 OTHER LABOR (13,759,745) (13,170,392) (589,353)
259 TOTAL ACCOUNT190 (17,613,854) (17,017,305) (596,549)
260 281/ACCELERATED AMORTIZATION P7o1P - - -
261 282/OTHER PROPERTY P1o1P 395,105,792 378,317,670 16,788,122
262 283/OTHER P1o1P 10,180,872 9,748,285 432,587
263 TOTAL ACCUM DEFERRED INCOME TAXES 387,672,810 371,048,649 16,624,160
264
265 NET ELECTRIC PLANT IN SERVICE 4,441,213,585 4,252,080,528 189,133,057
266 ADD:
267 WORKING CAPITAL
268 151/FUEL INVENTORY Eio 19,716,209 18,884,385 831,824
269 154/PLANT MATERIALS&SUPPLIES
270 PRODUCTION-GENERAL L 105 14,733,716 14,151,451 582,265
271 TRANSMISSION-GENERAL L143 32,918,344 31,615,444 1,302,900
272 DISTRIBUTION-GENERAL L 163 67,378,274 64,257,741 3,120,534
273 OTHER-UNCLASSIFIED L 179 4,737,661 4,536,490 201,171
274 TOTAL ACCOUNT154 119,767,996 114,561,126 5,206,870
275 165/PREPAID ITEMS
276 AD VALOREM TAXES L 707 - - -
277 OTHER PROD-RELATED PREPAYMENTS D10 - - -
278 INSURANCE L 105 - - -
279 PENSION-RELATED PREPAYMENTS L 1002 - - -
280 SOFTWARE CONTRACTS L 95 - - -
281 MISCELLANEOUS PREPAYMENTS P7o1P - - -
282 TOTAL ACCOUNT 165 - - -
283 WORKING CASH ALLOWANCE L 623 - - -
284
285 TOTAL WORKING CAPITAL 139,484,205 133,445,511 6,038,694
286
287 NET ELECTRIC PLANT IN SERVICE 4,580,697,790 4,385,526,039 195,171,751
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 8 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
3 DESCRIPTION SOURCE SYSTEM IPUC OPUC
288***TABLE 3-ADDITIONS&DELETIONS TO RATE BASE***
289
290 NET ELECTRIC PLANT IN SERVICE 4,580,697,790 4,385,526,039 195,171,751
291 ADD:
292 105/PLANT HELD FOR FUTURE USE
293 HYDRAULIC PRODUCTION L 101 - - -
294 TRANS LAND&LAND RIGHTS L III - - -
295 TRANS STRUCTURES&IMPROVEMENTS L 116 - - -
296 TRANS STATION EQUIPMENT L 121 - - -
297 DIST LAND&LAND RIGHTS L 149 - - -
298 DIST STRUCTURES&IMPROVEMENTS L 150 - - -
299 GEN LAND&LAND RIGHTS L 166 - - -
300 GEN STRUCTURES&IMPROVEMENTS L 167 - - -
301 TOTAL PLANT HELD FOR FUTURE USE - - -
302
303 ELECTRIC PLANT ACQUISITION ADJ:114/5 CIDA 628,247 628,247 -
304
305 DEFERRED PROGRAMS:
306 182/CONSERVATION PROGRAMS
307 IDAHO DEFERRED CONSERVATION PROGRAMS CIDA - - -
308 OREGON DEFERRED CONSERVATION PROGRAMS CODA - - -
309 TOTAL CONSERVATION PROGRAMS - - -
310 182/MISC.OTHER REGULATORY ASSETS
311 CUB FUND INTEREST-OPUC ORDER I5-399 CODA 59,702 - 59,702
312 AM.FALLS BOND REFINANCE D10 72,977 70,093 2,884
313 SFAS 87 CAPITALIZED PENSION-OPUC ORDER 10-064 CODA 7,096,835 - 7,096,835
314 CLOUD COMPUTING-IPUC ORDER 34707 CIDA 1,250,083 1,250,083 -
315 WILDFIRE MITIGATION-IPUC ORDER 35077 CIDA 24,651,249 24,651,249 -
316 SIEMENS LTP DEFERRED RATE BASE-IPUC ORDER 33420 CIDA 8,181,006 8,181,006 -
317 SIEMENS LTP RATE BASE-IPUC ORDER 33420 CIDA 12,207,705 12,207,705 -
318 SIEMENS LTP DEFERRED RATE BASE-OPUC ORDER 15-387 CODA 343,307 - 343,307
319 SIEMENS LTP RATE BASE-OPUC ORDER 15-387 CODA 471,789 - 471,789
320 TOTAL OTHER REGULATORY ASSETS 54,334,654 46,360,137 7,974,517
321 186/MISC.OTHER DEFERRED PROGRAMS EIO - - -
322 254/JIM BRIDGER PLANT END OF LIFE DEPR-OPUC ORD 12-296 CODA (2,753,872) - (2,753,872)
323 RECONNECT FEES-OPUC ADV 16-09 CODA (17,468) - (17,468)
324 TOTAL DEFERRED PROGRAMS 51,563,314 46,360,137 5,203,177
325
326 DEVELOPMENT OF IERCO RATE BASE
327 INVESTMENT IN IERCO EIO 18,375,460 17,600,202 775,258
328 PREPAID COAL ROYALTIES EIO 606,862 581,259 25,603
329 NOTES RECEIVABLE FROM SUBSIDIARY EIO 17,209,739 16,483,663 726,076
330 TOTAL SUBSIDIARY RATE BASE 36,192,061 34,665,124 1,526,937
331 Exhibit No. 6
332 TOTAL COMBINED RATE BASE 4,669,081,412 4,467,179,547 201,901,865
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 9 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
333***TABLE 4-OPERATING REVENUES
334 OPERATING REVENUES
335 FIRM ENERGY SALES
336 440-448/RETAIL RETREV 1,283,843,868 1,230,016,095 53,827,773
337 447/ FIRM SALES FOR RESALE E10 - - -
338447/SYSTEM OPPORTUNITY SALES E10 29,035,180 27,810,191 1,224,989
339 TOTAL SALES OF ELECTRICITY 1,312,879,048 1,257,826,285 55,052,763
340
341 OTHER OPERATING REVENUES
342 415/MERCHANDISING REVENUES D60 4,655,894 4,483,811 172,083
343
3"449/OATT TARIFF REFUND
345 NETWORK D11 - - -
346 POINT-TO-POINT D11 - - -
347 TOTALACCOUNT449 - - -
348
349 4511 MISCELLANEOUS SERVICE REVENUES DA451 5,220,513 5,158,858 61,655
350
351 454/RENTS FROM ELECTRIC PROPERTY
352 SUBSTATION EQUIPMENT L121 3,272,778 3,143,234 129,544
353 TRANSFORMER RENTALS 011 17,330 16,645 685
354 LINE RENTALS 011 - - -
355 COGENERATION L 490 1,896,418 1,816,408 80,010
356 DARK FIBER PROJECT CIDA 66,667 66,667 -
357 POLE ATTACHMENTS L 153 1,756,476 1,618,869 137,607
358 FACILITIES CHARGES DA454 10,841,971 10,407,743 434,228
359 OTHER RENTALS L101 1,246,139 1,196,893 49,246
360 WATER LEASE E10 66,960 64,135 2,825
361 TOTALACCOUNT454 19,164,738 18,330,593 834,145
362
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 10 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
363 4561 OTHER ELECTRIC REVENUES
364 TRANSMISSION-NETWORK SERVICES D11 10,740,800 10,316,332 424,468
365 TRANSMISSION-NETWORK SERVICES-DISTFACILITIES D60 765,132 736,853 28,279
366 TRANSMISSION-POINT-TO-POINT D71 49,148,205 47,205,906 1,942,299
367 ALTERNATE TRANSMISSION SERV.CHG. L 144 - - -
368 PHOTOVOLTAIC STATION SERVICE L 163 - - -
369 DSM RIDER FUNDS DARIDER - - -
370 STANDBY SERVICE CHARGE CIDA 741,858 741,858 -
371 SIERRA PACIFIC USAGE CHARGE Eio - - -
372 BPA-OTHER REVENUE Dio - - -
373 ANTELOPE L 515 - - -
374 MISCELLANEOUS PTD 8,346 7,991 355
375 TOTALACCOUNT456 61,404,340 59,008,940 2,395,401
376
377 TOTAL OTHER OPERATING REVENUES 90,445,486 86,982,202 3,463,284
378
379 TOTAL OPERATING REVENUES 1,403,324,534 1,344,808,487 58,516,046
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 11 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
3 DESCRIPTION SOURCE SYSTEM IPUC OPUC
380***TABLE 5-OPERATION&MAINTENANCE EXPENSES
381
382 STEAM POWER GENERATION
383 OPERATION
384 500/SUPERVISION&ENGINEERING DIO (147,309) (141,488) (5,822)
385 501/FUEL E10 65,523,000 62,758,595 2,764,405
386
387 502/STEAM EXPENSES
388 LABOR DIO - - -
389 OTHER E10 (2,000) (1,916) (84)
390 TOTAL ACCOUNT502 (2,000) (1,916) (84)
391 505/ELECTRIC EXPENSES
392 LABOR DIO - - -
393 OTHER E10 (0) (0) (0)
394 TOTAL ACCOUNT 505 (0) (0) (0)
395 506/MISCELLANEOUS EXPENSES DIO (59) (57) (2)
396 507/RENTS L 100 - - -
397 TOTAL STEAM OPERATION EXPENSES 65,373,631 62,615,135 2,758,496
398
399 MAINTENANCE
400 510/SUPERVISION&ENGINEERING DIO (282,132) (270,982) (11,150)
401 511 /STRUCTURES DIO (0) (0) (0)
402 512/BOILER PLANT
403 LABOR DIO - - -
404 OTHER E10 0 0 0
405 TOTAL ACCOUNT 512 0 0 0
406 513/ELECTRIC PLANT
407 LABOR DIO - - -
408 OTHER E10 - - -
409 TOTAL ACCOUNT 513 - - -
410 514/MISCELLANEOUS STEAM PLANT D70 0 0 0
411 TOTAL STEAM MAINTENANCE EXPENSES (282,131) (270,982) (11,150)
412
413 TOTAL STEAM GENERATION EXPENSES 65,091,500 62,344,153 2,747,347
414
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 12 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
415***TABLE 5-OPERATION&MAINTENANCE EXPENSES'
416
417 HYDRAULIC POWER GENERATION
418 535/SUPERVISION&ENGINEERING L 879 5,490,907 5,272,917 217,990
419 536/WATER FOR POWER
420 WATER LEASE D10 - - -
421 OTHER DIO 3,312,731 3,181,814 130,917
422 TOTAL ACCOUNT 536 3,312,731 3,181,814 130,917
423
424 537/HYDRAULIC EXPENSES DIO 19,552,157 18,779,471 772,686
425 538/ELECTRIC EXPENSES
426 LABOR DIO 1,915,562 1,839,861 75,702
427 OTHER E10 513,003 491,360 21,644
428 TOTAL ACCOUNT 538 2,428,565 2,331,220 97,345
429
430 539/MISCELLANEOUS EXPENSES DIO 6,049,766 5,810,684 239,082
431 540/RENTS DIO 311,854 299,530 12,324
432
433 TOTAL HYDRAULIC OPERATION EXPENSES 37,145,981 35,675,637 1,470,344
434
435 MAINTENANCE
436 541/SUPERVISION&ENGINEERING L 885 298,844 287,034 11,810
437 542/STRUCTURES DIO 937,125 900,090 37,034
438 543/RESERVOIRS,DAMS&WATERWAYS D70 2,361,075 2,267,768 93,308
439 544/ELECTRIC PLANT
440 LABOR DIO 1,725,010 1,656,839 68,171
441 OTHER E10 697,230 667,814 29,416
442 TOTAL ACCOUNT544 2,422,240 2,324,653 97,587
443
444 545/MISCELLANEOUS HYDRAULIC PLANT L 101 3,701,651 3,555,365 146,286
445
446 TOTAL HYDRAULIC MAINTENANCE EXPENSES 9,720,935 9,334,909 386,026
447
448 TOTAL HYDRAULIC GENERATION EXPENSES 46,866,916 45,010,546 1,856,370
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 13 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
449"`TABLE 5-OPERATION&MAINTENANCE EXPENSES
450 OTHER POWER GENERATION
451 OPERATION
452 546/SUPERVISION&ENGINEERING L 892 759,844 729,816 30,028
453 547/FUEL
454 SALMON DIESEL E10 16,517 15,820 697
455 OTHER E10 119,653,675 114,605,506 5,048,169
456 TOTAL ACCOUNT547 119,670,192 114,621,327 5,048,866
457
458 548/GENERATING EXPENSES
459 LABOR DIO 470,542 451,946 18,595
460 OTHER E10 5,285,971 5,062,957 223,014
461 TOTAL ACCOUNT548 5,756,513 5,514,903 241,610
462
463549/MISCELLANEOUS EXPENSES DIO 933,018 896,145 36,872
464 550/RENTS DIO - - -
465
466 TOTAL OTHER POWER OPER EXPENSES 127,119,567 121,762,191 5,357,376
467
468 MAINTENANCE
469 551/SUPERVISION&ENGINEERING L 898 - - -
470 552/STRUCTURES DIO 148,767 142,887 5,879
471 553/GENERATING&ELECTRIC PLANT
472 LABOR D10 71,469 68,645 2,824
473 OTHER E10 (91,258) (87,407) (3,850)
474 TOTAL ACCOUNT 553 (19,788) (18,763) (1,026)
475
476 554/MISCELLANEOUS EXPENSES L 103 5,257,613 5,049,837 207,777
477 TOTAL OTHER POWER MAINT EXPENSES 5,386,592 5,173,962 212,630
478
479 TOTAL OTHER POWER GENERATION EXP 132,506,159 126,936,153 5,570,006
480
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 14 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
481 OTHER POWER SUPPLY EXPENSE
482 555.0/PURCHASED POWER
483 PURCHASED POWER-TRANS LOSSES E10 1,096,106 1,049,861 46,245
484 DEMAND RESPONSE INCENTIVES CIDA 10,240,003 10,240,003 -
485 OTHER PURCHASED POWER E10 99,465,021 95,268,608 4,196,413
486 TOTAL ACCOUNT555.0 110,801,130 106,558,473 4,242,657
487 555.1/COGENERATION&SMALL POWER PROD
488 CAPACITY RELATED D70 - - -
489 ENERGY RELATED E10 214,448,755 205,401,197 9,047,558
490 TOTAL COGEN&SMALL POWER PROD 214,448,755 205,401,197 9,047,558
491
492 TOTAL ACCOUNT555 325,249,885 311,959,670 13,290,215
493
494 556/LOAD CONTROL&DISPATCHING EXPENSES D10 - - -
495 557/OTHER EXPENSES
496 IDAHO POWER COST-RELATED EXPENSES CIDA 11,089,392 11,089,392 -
497 OREGON POWER COST-RELATED EXPENSES CODA 2,742,786 - 2,742,786
498 OTHER D10 2,238,194 2,149,742 88,452
499 TOTAL ACCOUNT 557 16,070,371 13,239,134 2,831,237
500
501 TOTAL OTHER POWER SUPPLY EXPENSES 341,320,256 325,198,804 16,121,452
502
503 TOTAL PRODUCTION EXPENSES 585,784,831 559,489,656 26,295,175
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 15 of 37

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
504"**TABLE 5-OPERATION&MAINTENANCE EXPENSES
505
506 TRANSMISSION EXPENSES
507
508 OPERATION
509 560/SUPERVISION&ENGINEERING L 144 3,095,555 2,973,034 122,521
510 561/LOAD DISPATCHING D12 5,982,841 5,746,404 236,437
511 562/STATION EXPENSES L121 2,827,336 2,715,424 111,912
512 563/OVERHEAD LINE EXPENSES L127+132+137 1,307,218 1,255,466 51,752
513 565/TRANSMISSION OF ELECTRICITY BY OTHERS EIO 10,263,139 9,830,139 433,000
514 566/MISCELLANEOUS EXPENSES L 144 - - -
515 567/RENTS L144 5,051,708 4,851,762 199,945
516
517 TOTAL TRANSMISSION OPERATION 28,527,797 27,372,229 1,155,568
518
519 MAINTENANCE
520 568/SUPERVISION&ENGINEERING L144 381,737 366,628 15,109
521 569/STRUCTURES L116 1,905,784 1,830,458 75,326
522 570/STATION EQUIPMENT L 121 3,687,126 3,541,182 145,944
523 571/OVERHEAD LINES L 127+132+137 1,498,786 1,439,450 59,336
524 573/MISCELLANEOUS PLANT L 143 (78) (75) (3)
525 575/OPER TRANS MKT ADMIN-EIM L144 703,023 675,198 27,825
526
527 TOTAL TRANSMISSION MAINTENANCE 8,176,378 7,852,840 323,537
528
529 TOTAL TRANSMISSION EXPENSES 36,704,175 35,225,070 1,479,105
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 16 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
3 DESCRIPTION SOURCE SYSTEM IPUC OPUC
530***TABLE 5-OPERATION&MAINTENANCE EXPENSES*'
531
532 DISTRIBUTION EXPENSES
533
534 OPERATION
535 580/SUPERVISION&ENGINEERING L163 4,883,505 4,657,332 226,173
536 581/LOAD DISPATCHING D60 6,701,081 6,453,408 247,673
537 582/STATION EXPENSES L151 1,905,068 1,827,493 77,575
538 583/OVERHEAD LINE EXPENSES L 153+154 5,856,482 5,439,541 416,941
539 584/UNDERGROUND LINE EXPENSES L 155+156 5,744,802 5,657,373 87,429
540 585/STREET LIGHTING&SIGNAL SYSTEMS L 161 (17,461) (16,592) (869)
541586/METER EXPENSES L159 7,459,560 7,231,155 228,405
542 587/CUSTOMER INSTALLATIONS EXPENSE L160 1,444,874 1,350,153 94,721
543 588/MISCELLANEOUS EXPENSES L 163 4,637,720 4,422,930 214,790
544 589/RENTS L 163 639,456 609,840 29,616
545 TOTAL DISTRIBUTION OPERATION 39,255,088 37,632,635 1,622,453
546
547 MAINTENANCE
548 590/SUPERVISION&ENGINEERING L 163 5,684 5,421 263
549 591/STRUCTURES L 150 - - -
550 592/STATION EQUIPMENT L 151 5,931,659 5,690,120 241,539
551 593/OVERHEAD LINES L153+154 34,078,337 31,652,194 2,426,143
552 594/UNDERGROUND LINES L155+156 725,137 714,102 11,036
553595/LINE TRANSFORMERS L157 65,073 61,504 3,568
554 596/STREET LIGHTING&SIGNAL SYSTEMS L 161 149,941 142,478 7,463
555 597/METERS L 159 1,130,731 1,096,109 34,622
556 598/MISCELLANEOUS PLANT L 163 185,410 176,823 8,587
557 TOTAL DISTRIBUTION MAINTENANCE 42,271,971 39,538,751 2,733,220
558
559 TOTAL DISTRIBUTION EXPENSES 81,527,059 77,171,386 4,355,674
560
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 17 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
561 CUSTOMER ACCOUNTING EXPENSES
562 901/SUPERVISION L 959 1,020,032 975,561 44,472
563902/METER READING CW902 2,160,189 1,868,578 291,611
564903/CUSTOMER RECORDS&COLLECTIONS CW903 17,401,772 16,832,566 569,206
565904/UNCOLLECTIBLE ACCOUNTS Cw904 3,830,484 3,458,798 371,686
566 905/MISC EXPENSES L 563+564+565 (358) (339) (19)
567 TOTAL CUSTOMER ACCOUNTING EXPENSES 24,412,119 23,135,163 1,276,955
568 CUSTOMER SERVICES&INFORMATION EXPENSES
569 907/SUPERVISION L 966 1,076,445 1,034,603 41,841
570 908/CUSTOMER ASSISTANCE
571 SYSTEM CONSERVATION E100 312,791 299,594 13,197
572 OTHER DA908 8,884,565 8,540,260 344,305
573 TOTAL ACCOUNT908 9,197,356 8,839,855 357,501
574 909/INFORMATION&INSTRUCTIONAL DA909 282,865 273,844 9,021
575 910/MISCELLANEOUS EXPENSES L 573+574 889,938 855,532 34,407
576 TOTAL CUST SERV&INFORMATN EXPENSES 11,446,605 11,003,834 442,770
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 18 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
577***TABLE 5-OPERATION&MAINTENANCE EXPENSES
578 SALES EXPENSES
579 912/DEMO&SELLING EXPENSES E10 - - -
580 TOTAL ACCOUNT 924 - - -
581
582 ADMINISTRATIVE&GENERAL EXPENSES
583 920/ADMINISTRATIVE&GENERAL SALARIES LABOR 92,786,842 88,812,625 3,974,217
584 921/OFFICE SUPPLIES LABOR 16,584,609 15,874,262 710,347
585 922/ADMIN&GENERAL EXPENSES TRANSFERRED-CR LABOR (51,999,902) (49,772,659) (2,227,243)
586 923/OUTSIDE SERVICES LABOR 10,180,054 9,744,026 436,029
587 924/PROPERTY INSURANCE
588 PRODUCTION-STEAM D10 465,139 446,757 18,382
589 ALL RISK&MISCELLANEOUS P710P 2,935,891 2,817,492 118,398
590 TOTAL ACCOUNT 924 3,401,030 3,264,249 136,780
591
592925/INJURIES&DAMAGES LABOR 12,296,837 11,770,143 526,694
593 926/EMPLOYEE PENSIONS&BENEFITS LABOR 51,951,225 49,726,067 2,225,158
594 EMPLOYEE PENSIONS&BENEFITS-OREGON CODA 514,677 - 514,677
595 EMPLOYEE PENSIONS&BENEFITS-IDAHO CIDA 35,182,378 35,182,378 -
596 EMPLOYEE PENSIONS&BENEFITS-FERC D11 - - -
597 927/FRANCHISE REQUIREMENTS CIDA - - -
598 928/REGULATORY COMMISSION EXPENSES
599 FERC ADMIN ASSESS&SECURITIES
600 CAPACITY RELATED D10 3,043,871 2,923,580 120,291
601 ENERGY RELATED E10 1,044,908 1,000,824 44,084
602 FERC RATE CASE D11 - - -
603 FERC ORDER472 E99 1,108,266 1,061,278 46,988
604 FERC OTHER D11 283,013 271,828 11,184
605 FERC-OREGON HYDRO FEE D11 271,717 260,979 10,738
606 SEC EXPENSES L 179 - - -
607 IDAHO PUC-RATE CASE CIDA - - -
608 -OTHER CIDA 48,457 48,457
609 OREGON PUC-RATE CASE CODA - - -
610 -OTHER CODA 329,733 - 329,733
611 TOTAL ACCOUNT 928 6,129,965 5,566,945 563,019
612
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 19 of 37

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
613 929/DUPLICATE CHARGES LABOR - - -
614 930.11 GENERAL ADVERTISING LABOR - - -
615 930.21 MISCELLANEOUS EXPENSES LABOR 3,387,272 3,242,190 145,083
616 931 I RENTS L 177 - - -
617 TOTAL ADM&GEN OPERATION 180,414,987 173,410,225 7,004,761
618
619 9351 GENERAL PLANT MAINTENANCE L 177 8,280,911 7,929,054 351,858
620 TOTAL ADMIN&GENERAL EXPENSES 188,695,898 181,339,279 7,356,619
621
622 4161 MERCHANDISING EXPENSE D60 5,870,784 5,653,799 216,985
623 TOTAL OPER&MAINT EXPENSES 934,441,471 893,018,187 41,423,284
624
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 20 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
625***TABLE 6-DEPRECIATION&AMORTIZATION EXPENSE
626
627 DEPRECIATION EXPENSE
628 310-316 1 STEAM PRODUCTION L 100 10,246,819 9,841,873 404,946
629 330-336/HYDRAULIC PRODUCTION L101 29,099,413 27,949,427 1,149,986
630 340-346/OTHER PRODUCTION-LANGLEY L102 12,559,576 12,063,232 496,345
631 340-3461 OTHER PRODUCTION-DANSKIN/BENNETT MTN L 103 6,483,109 6,226,902 256,207
632 TOTAL PRODUCTION PLANT 58,388,917 56,081,433 2,307,485
633
634 TRANSMISSION PLANT
635 350/LAND&LAND RIGHTS L 111 477,848 458,964 18,884
636 352/STRUCTURES&IMPROVEMENTS L116 2,161,701 2,076,260 85,441
637 353/STATION EQUIPMENT L 121 11,225,973 10,781,625 444,348
638 354/TOWERS&FIXTURES L127 2,950,779 2,834,166 116,612
639 355/POLES&FIXTURES L 132 7,018,607 6,740,397 278,210
640 3561 OVERHEAD CONDUCTORS&DEVICES L 137 4,276,282 4,106,929 169,353
641 359/ROADS&TRAILS L 142 2,796 2,685 110
642 TOTAL TRANSMISSION PLANT 28,113,987 27,001,027 1,112,959
643
644 DISTRIBUTION PLANT
645360/LAND&LAND RIGHTS L149 27,253 26,097 1,156
646 361/STRUCTURES&IMPROVEMENTS L150 1,582,324 1,513,424 68,900
647 362/STATION EQUIPMENT L 151 6,685,998 6,413,742 272,256
648 3631 BATTERY STORAGE L 152 15,080,023 14,484,072 595,951
649 364/POLES,TOWERS&FIXTURES L 153 6,807,143 6,273,853 533,290
650 3651 OVERHEAD CONDUCTORS&DEVICES L 154 3,769,855 3,558,634 211,221
651366/UNDERGROUND CONDUIT L155 1,424,328 1,401,450 22,877
652 367/UNDERGROUND CONDUCTORS&DEVICES L 156 8,603,139 8,473,384 129,755
653368/LINE TRANSFORMERS L157 15,695,524 14,834,810 860,713
654 369/SERVICES L 158 1,249,138 1,197,693 51,445
655 370/METERS L 159 6,169,537 5,980,631 188,906
656 3711 INSTALLATIONS ON CUSTOMER PREMISES L 160 291,294 272,198 19,096
657 373 1 STREET LIGHTING SYSTEMS L161 251,969 239,428 12,541
658 TOTAL DISTRIBUTION PLANT 67,637,523 64,669,417 2,968,106
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 21 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
659***TABLE 6-DEPRECIATION&AMORTIZATION EXPENSE***
660
661 GENERALPLANT
662 389/LAND&LAND RIGHTS L 166 - - -
663390/STRUCTURES&IMPROVEMENTS L167 4,140,032 3,964,122 175,911
664 391/OFFICE FURNITURE&EQUIPMENT L 168 7,279,581 6,970,270 309,311
665 392/TRANSPORTATION EQUIPMENT L 169 6,037 5,781 257
666 393/STORES EQUIPMENT L 170 360,037 344,739 15,298
667 394/TOOLS,SHOP&GARAGE EQUIPMENT L 171 863,151 826,476 36,675
668 395/LABORATORY EQUIPMENT L172 935,849 896,085 39,764
669 396/POWER OPERATED EQUIPMENT L 173 - - -
670 397/COMMUNICATIONS EQUIPMENT L 174 5,859,096 5,610,142 248,954
671 3981 MISCELLANEOUS EQUIPMENT L 175 746,357 714,644 31,713
672 TOTAL GENERAL PLANT 20,190,141 19,332,258 857,883
673
674 403/BOARDMAN ARO DEPRECIATION EXP DAARO - - -
675 DEPR EXP BEFORE DISALLOWED COSTS 174,330,569 167,084,135 7,246,433
676
677 DEPRECIATION ON DISALLOWED COSTS L 675 (296,299) (283,983) (12,316)
678 TOTAL DEPRECIATION EXPENSE 174,034,269 166,800,152 7,234,117
679
680 AMORTIZATION EXPENSE
681 INTANGIBLE PLANT L 97 6,975,364 6,688,593 286,771
682 HYDRAULIC PRODUCTION L101 1,959,025 1,881,606 77,419
683 ADJUSTMENTS,GAINS&LOSSES L 97 15,018 14,424 593
684 TOTAL AMORTIZATION EXPENSE 8,949,407 8,584,623 364,784
685
686 TOTAL DEPRECIATION&AMORTIZATION EXP 182,983,676 175,384,775 7,598,900
687
688 411.093/4/ARO ACCRETION EXPENSE DAACCRETION 12,995 12,485 509
689
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 22 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOCI TOTAL IDAHO OREGON
3 DESCRIPTION SOURCE SYSTEM IPUC OPUC
690***TABLE 7-TAXES OTHER THAN INCOME TAXES
691
692 TAXES OTHER THAN INCOME
693 FEDERALTAXES
694 FICA LABOR - - -
695 FUTA LABOR - - -
696 LESS PAYROLL DEDUCTION LABOR - - -
697
698 STATE TAXES
699 AD VALOREM TAXES
700 JIM BRIDGER STATION L100 1,310,444 1,258,656 51,788
701 VALMY L 100 279,802 268,744 11,058
702 BOARDMAN L 100 - - -
703 OTHER-PRODUCTION PLANT L105 5,023,123 4,824,613 198,510
704 OTHER-TRANSMISSION PLANT L 143 5,094,471 4,892,833 201,638
705 OTHER-DISTRIBUTION PLANT L 163 6,775,452 6,461,656 313,796
706 OTHER-GENERAL PLANT L177 1,071,005 1,025,498 45,507
707 SUB-TOTAL 19,554,298 18,732,002 822,296
708
709 LICENSES-HYDRO PROJECTS L 101 4,376 4,203 173
710
711 REGULATORY COMMISSION FEES
712 STATE OF IDAHO CIDA 2,837,473 2,837,473 -
713 STATE OF OREGON CODA 260,575 - 260,575
714
715 FRANCHISE TAXES
716 STATE OF OREGON CODA 944,305 - 944,305
717
718 OTHER STATE TAXES
719 UNEMPLOYMENTTAXES LABOR - - -
720 HYDRO GENERATION KWH TAX E10 1,659,564 1,589,547 70,017
721 IRRIGATION-PIC E10 293,571 281,185 12,386
722
723 CANADA GST TAXES E10 - - -
724
725 TOTAL TAXES OTHER THAN INCOME 25,554,161 23,444,410 2,109,751
726
727
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 23 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
728***TABLE 8-REGULATORY DEBITS/CREDITS
729 REGULATORY DEBITS/CREDITS
730 STATE OF IDAHO CioA 5,339,621 5,339,621 -
731 STATE OF OREGON CODA 317,709 - 317,709
732
733 TOTAL REGULATORY DEBITS/CREDITS 5,657,329 5,339,621 317,709
734
735
736"**TABLE 9-INCOME TAXES*"
737
738 410/411 NET PROVISION FOR DEFERRED INCOME TAXES
739 ACCOUNT#282-RELATED PioiP (12,766,841) (12,224,375) (542,466)
740 ACCOUNTS#1908#283-RELATED L769 (2,657,192) (2,583,469) (73,723)
741 TOTAL NET PROVISION FOR DEFERRED INCOME TAXES (15,424,032) (14,807,844) (616,189)
742
743411.4-INVESTMENT TAX CREDIT ADJUSTMENT PioiP 124,171,136 118,895,080 5,276,056
744
745 SUMMARY OF INCOME TAXES
746
747 TOTAL FEDERAL INCOME TAX L786 (101,137,048) (97,803,208) (3,333,840)
748
749 STATE INCOME TAX
750 STATE OF IDAHO L 852 (10,827,212) (10,427,509) (399,703)
751 STATE OF OREGON L 827 402,339 402,339 -
752 OTHER STATES L868 (129,664) (121,189) (8,475)
753 TOTAL STATE INCOME TAXES (10,554,538) (10,146,359) (408,178)
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 24 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
754***TABLE 10-CALCULATION OF FEDERAL INCOME TAX***
755
756 OPERATING REVENUES 1,403,324,534 1,344,808,487 58,516,046
757
758 OPERATING EXPENSES
759 OPERATION&MAINTENANCE 934,441,471 893,018,187 41,423,284
760 DEPRECIATION EXPENSE 174,034,269 166,800,152 7,234,117
761 AMORTIZATION OF LIMITED TERM PLANT 8,949,407 8,584,623 364,784
762 ACCRETION EXPENSE 12,995 12,485 509
763 TAXES OTHER THAN INCOME 25,554,161 23,444,410 2,109,751
764 REGULATORY DEBITSICREDITS 5,657,329 5,339,621 317,709
765 TOTAL OPERATING EXPENSES 1,148,649,632 1,097,199,478 51,450,153
766
767 BOOK-TAX ADJUSTMENT L 765 - - -
768
769 INCOME BEFORE TAX ADJUSTMENTS 254,674,902 247,609,009 7,065,893
770
771 INCOME STATEMENT ADJUSTMENTS
772 LONG TERM DEBT INTEREST EXPENSE L24 136,594,388 130,687,731 5,906,657
773 OTHER INTEREST EXPENSE L24 19,913,023 19,051,938 861,085
774 TOTAL INTEREST CHARGES 156,507,411 149,739,669 6,767,742
775
776 NET OPERATING INCOME BEFORE STATE INCOME TAXES 98,167,491 97,869,340 298,151
777
778 TOTAL STATE INCOME TAXES(ALLOWED) (6,670,047) (6,134,210) (535,836)
779
780 NET FEDERAL INCOME AFTER STATE INCOME TAXES 104,837,537 104,003,550 833,987
781
782 FEDERAL TAX AT21PERCENT 22,015,883 21,840,745 175,137
783 OTHER CURRENT TAX ADJUSTMENTS L782 (42,231,900) (41,895,943) (335,957)
784 PRIOR YEARS'TAX ADJUSTMENT L782 (9,810,034) (9,731,994) (78,039)
785
786 TOTAL FEDERAL INCOME TAX BEFORE OTHER ADJUSTMENTS (30,026,051) (29,787,192) (238,859)
787
788 OTHER TAX ADJUSTMENTS
789 ALLOWANCE FOR AFUDC P1o1P - - -
790 FEDERAL INCOME TAX ADJUSTMENTS-PLANT P1o1P (38,661,626) (37,018,886) (1,642,740)
791 FEDERAL INCOME TAX ADJUSTMENTS-OTHER L769 23,723,545 23,065,341 658,204
792 SUM OF OTHER ADJUSTMENTS (14,938,081) (13,953,545) (984,536)
793 FEDERAL TAX ON OTHER TAX ADJ AT 21 PERCENT (3,136,997) (2,930,244) (206,753)
794 FEDERAL GENERAL BUSINESS CREDITS P1o1P 67,974,000 65,085,772 2,888,228
795
796 TOTAL FEDERAL INCOME TAX (101,137,048) (97,803,208) (3,333,840)
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 25 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
8 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
797"*TABLE 11-OREGON STATE INCOME TAXES"*"
798
799 NET OPERATING INCOME BEFORE TAXES-OREGON L776 98,167,491 97,869,340 298,151
800
801 ALLOWANCE FOR AFUDC P1o1P - - -
802
803 STATE INCOME TAX ADJUSTMENTS-PLANT P101P (38,661,626) (37,018,886) (1,642,740)
804 STATE INCOME TAX ADJUSTMENTS-OTHER L769 23,723,545 23,065,341 658,204
805 TOTAL STATE INCOME TAX ADJUSTMENTS (14,938,081) (13,953,545) (984,536)
806 ADD: MFG DEDUCTION NOT ALLOWED L 769 - - -
807
808 TOTAL STATE INCOME TAX ADJUSTMENTS-OREGON (14,938,081) (13,953,545) (984,536)
809
810 INCOME SUBJECT TO OREGON TAX 83,229,410 83,915,795 (686,385)
811
812 IERCO TAXABLE INCOME E10 13,361,504 12,797,784 563,720
813 BONUS DEPRECIATION ADJUSTMENT P1o1P (6,823,240) (6,533,319) (289,921)
814 FEDERAL NOL L 750 - - -
815 TOTAL STATE TAXABLE INCOME-OREGON 89,767,674 90,180,260 (412,586)
816 APPORTIONMENT FACTOR(0.045454550) 4,099,103 4,099,103 -
817 POST APPORTIONMENT M ITEMS L 757 - - -
818 TOTAL TAXABLE INCOME-OREGON 4,099,103 4,099,103 -
819
820 OREGON TAX AT 6.6 PERCENT 270,541 270,541 -
821 LESS:INVESTMENT TAX CREDIT P701P - - -
822
823 STATE INCOME TAX ALLOWED-OREGON 270,541 270,541 -
824 ADD: FIN 48 ADJUSTMENT L 819 282,224 282,224 -
825 PRIOR YEARS'TAX ADJUSTMENT L820 (150,426) (150,426) -
826
827 STATE INCOME TAX PAID-OREGON 402,339 402,339 -
828
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 26 of 37

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
829-TABLE*TABLE 12-IDAHO STATE INCOME TAXES***
830
831 NET OPERATING INCOME BEFORE TAXES-IDAHO L776 98,167,491 97,869,340 298,151
832
833 ALLOWANCE FOR AFUDC P101P - - -
834
835 STATE INCOME TAX ADJUSTMENTS-PLANT P101P (38,661,626) (37,018,886) (1,642,740)
836 STATE INCOME TAX ADJUSTMENTS-OTHER L769 23,723,545 23,065,341 658,204
837 STATE INCOME TAX ADJUSTMENTS (14,938,081) (13,953,545) (984,536)
838
839 INCOME SUBJECT TO IDAHO TAX 83,229,410 83,915,795 (686,385)
840
841 IERCO TAXABLE INCOME E10 13,361,504 12,797,784 563,720
842 BONUS DEPRECIATION ADJUSTMENT P701P (42,661,135) (40,848,455) (1,812,680)
843 FEDERAL NOL L 750 - - -
844 TOTAL STATE TAXABLE INCOME-IDAHO 53,929,779 55,865,124 (1,935,345)
845
846 IDAHO TAX AT 5.6 PERCENT 3,020,068 3,128,447 (108,379)
847 LESS:INVESTMENT TAX CREDIT P701P 10,057,246 9,629,912 427,334
848
849 STATE INCOME TAX ALLOWED-IDAHO (7,037,178) (6,501,465) (535,714)
850 ADD: FIN 48 ADJUSTMENT L 845 - - -
851 PRIOR YEARS'TAX ADJUSTMENT L846 (3,790,034) (3,926,044) 136,011
852 STATE INCOME TAX PAID-IDAHO (10,827,212) (10,427,509) (399,703)
853
854
855 OTHER STATE INCOME TAX
856 INCOME SUBJECT TO TAX 83,229,410 83,915,795 (686,385)
857
858 IERCO TAXABLE INCOME E10 13,361,504 12,797,784 563,720
859 BONUS DEPRECIATION ADJUSTMENT P701P - - -
860 FEDERAL NOL L 750 - - -
861 TOTAL TAXABLE INCOME BEFORE APPORTIONMENT-OTHER STATES 96,590,914 96,713,579 (122,665)
862 POST APPORTIONMENT M ITEMS L 757 - - -
863 TOTAL TAXABLE INCOME-OTHER STATES 96,590,914 96,713,579 (122,665)
864
865 OTHER TAX AT0.1PERCENT 96,591 96,714 (123)
866 ADD: FIN 48 ADJUSTMENT L 852 - - -
867 PRIOR YEARS'TAX ADJUSTMENT L852 (226,255) (217,903) (8,353)
868 OTHER STATES'INCOME TAX PAID (129,664) (121,189) (8,475)
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 27 of 37

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
869***TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
870 STEAM POWER GENERATION
871 500-513/TOTAL STEAM GENERATION Dio 442,341 424,860 17,481
872 HYDRAULIC POWER GENERATION
873 535/SUPERVISION&ENGINEERING L879 4,198,454 4,031,774 166,680
874536/WATER FOR POWER E10 870,626 833,895 36,732
875 537/HYDRAULIC EXPENSES D70 6,581,987 6,321,872 260,115
876 538/ELECTRIC EXPENSES Dio 1,659,356 1,593,780 65,576
877 539/MISCELLANEOUS EXPENSES Dio 3,733,853 3,586,294 147,559
878 540/RENTS Dio - - -
879 TOTAL HYDRAULIC OPERATION EXPENSES 17,044,277 16,367,615 676,662
880 541/SUPERVISION&ENGINEERING L 885 167,910 161,275 6,636
881542/STRUCTURES Dio 567,222 544,806 22,416
882543/RESERVOIRS,DAMS&WATERWAYS D70 301,175 289,273 11,902
883544/ELECTRIC PLANT Dio 1,724,170 1,656,032 68,138
884545/MISCELLANEOUS HYDRAULIC PLANT Dio 2,266,086 2,176,532 89,554
885 TOTAL HYDRAULIC MAINTENANCE EXPENSES 5,026,564 4,827,918 198,646
886 TOTAL HYDRAULIC GENERATION EXPENSES 22,070,840 21,195,533 875,307
887 OTHER POWER GENERATION
888 546/SUPERVISION&ENGINEERING L 892 582,577 559,554 23,023
889 548/GENERATING EXPENSES Dio - - -
890549/MISCELLANEOUS EXPENSES Dio 3,495,474 3,357,336 138,138
891550/RENTS Dio 496,069 476,464 19,604
892 TOTAL OTHER POWER OPER EXPENSES 4,574,120 4,393,354 180,766
893
894 551/SUPERVISION&ENGINEERING L 898 - - -
895 552/STRUCTURES D70 47,812 45,922 1,889
896553/GENERATING&ELECTRIC PLANT Dio 65,753 63,154 2,598
897 554/MISCELLANEOUS EXPENSES Dio 523,281 502,601 20,680
898 TOTAL OTHER POWER MAINT EXPENSES 636,845 611,678 25,168
899 TOTAL OTHER POWER GENERATION EXP 5,210,965 5,005,032 205,933
900 555/PURCHASE POWER E10 - - -
901 556/LOAD CONTROL&DISPATCHING EXPENSES D70 - - -
902 Dio 4,863,381 4,671,184 192,197
903 TOTAL OTHER POWER SUPPLY EXPENSES 4,863,381 4,671,184 192,197
904
905 TOTAL PRODUCTION EXPENSES 32,587,528 31,296,609 1,290,919
906
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 28 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
907***TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
908
909 TRANSMISSION EXPENSES
910 560/SUPERVISION&ENGINEERING L144 2,317,807 2,226,069 91,738
911 561/LOAD DISPATCHING D12 3,373,689 3,240,363 133,326
912 562/STATION EXPENSES L121 1,900,727 1,825,492 75,235
913 563/OVERHEAD LINE EXPENSES L127+132+137 483,392 464,255 19,137
914 565/TRANSMISSION OF ELECTRICITY BY OTHERS E10 - - -
915 566/MISCELLANEOUS EXPENSES L 529 - - -
916 567/RENTS L 144 - - -
917 TOTAL TRANSMISSION OPERATION 8,075,615 7,756,179 319,436
918 568/SUPERVISION&ENGINEERING L 144 139,203 133,694 5,510
919 569/STRUCTURES L 116 1,426,838 1,370,442 56,396
920 570/STATION EQUIPMENT L 121 2,616,011 2,512,464 103,547
921 571/OVERHEAD LINES L 127+132+137 972,477 933,977 38,500
922 575/OPER TRANS MKT ADMIN-EIM L144 1,155 1,109 46
923 TOTAL TRANSMISSION MAINTENANCE 5,155,684 4,951,686 203,998
924 TOTAL TRANSMISSION EXPENSES 13,231,299 12,707,865 523,434
925
926 DISTRIBUTION EXPENESES
927 580/SUPERVISION&ENGINEERING L 163 3,237,656 3,087,708 149,948
928 581/LOAD DISPATCHING D60 4,740,713 4,565,495 175,218
929 582/STATION EXPENSES L151 1,048,893 1,006,182 42,711
930 583/OVERHEAD LINE EXPENSES L153+154 3,701,154 3,437,657 263,497
931584/UNDERGROUND LINE EXPENSES L155+156 1,636,360 1,611,456 24,903
932 585/STREET LIGHTING&SIGNAL SYSTEMS L 161 1,916 1,821 95
933586/METER EXPENSES L159 4,739,824 4,594,694 145,129
934 587/CUSTOMER INSTALLATIONS EXPENSE L160 857,913 801,672 56,242
935 588/MISCELLANEOUS EXPENSES L 559 2,979,865 2,820,662 159,203
936 589/RENTS L 163 - - -
937 TOTAL DISTRIBUTION OPERATION 22,944,293 21,927,348 1,016,946
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 29 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
938***TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR"*'
939
940
941 590/SUPERVISION&ENGINEERING L163 7,755 7,396 359
942 591/STRUCTURES L 150 - - -
943 592/STATION EQUIPMENT L 151 3,271,354 3,138,143 133,210
9"593/OVERHEAD LINES L 153+154 5,418,492 5,032,733 385,759
945 594/UNDERGROUND LINES L155+156 311,063 306,329 4,734
946595/LINE TRANSFORMERS L157 24,796 23,436 1,360
947 596/STREET LIGHTING&SIGNAL SYSTEMS L 161 93,462 88,810 4,652
948 597/METERS L 159 769,699 746,131 23,568
949 598/MISCELLANEOUS PLANT L 163 105,914 101,008 4,905
950 TOTAL DISTRIBUTION MAINTENANCE 10,002,534 9,443,987 558,547
951 TOTAL DISTRIBUTION EXPENSES 32,946,827 31,371,335 1,575,493
952
953 CUSTOMER ACCOUNTING EXPENSES
954 901/SUPERVISION L 959 794,380 759,746 34,634
955 902/METER READING Cw902 1,260,207 1,090,088 170,120
956903/CUSTOMER RECORDS&COLLECTIONS CW903 10,577,395 10,231,412 345,983
957 904/UNCOLLECTIBLE ACCOUNTS CW904 - - -
958 905/MISC EXPENSES L 955-957 - - -
959 TOTAL CUSTOMER ACCOUNTING EXPENSES 12,631,982 12,081,246 550,736
960
961 CUSTOMER SERVICES&INFORMATION EXPENSES
962 907/SUPERVISION L 965 836,042 803,545 32,497
963 908/CUSTOMER ASSISTANCE L 573 5,242,141 5,038,379 203,762
964 909/INFORMATION&INSTRUCTIONAL L 574 - - -
965 910/MISCELLANEOUS EXPENSES L 963+964 384,926 369,964 14,962
966 TOTAL CUST SERV&INFORMATN EXPENSES 6,463,109 6,211,888 251,221
967
968 SALES EXPENSES
969 912/DEMO&SELLING EXPENSES L 579 - - -
970 TOTAL SALES EXPENSES - - -
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 30 of 37

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
971 "**TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
972
973 ADMINISTRATIVE&GENERAL EXPENSES
974 920/ADMINISTRATIVE&GENERAL SALARIES PTOCAS 58,534,056 56,026,787 2,507,269
975 921/OFFICE SUPPLIES PTDCAS 403,723 386,430 17,293
976 922/ADMIN&GENERAL EXPENSES TRANSFERRED-CR SUBEX - - -
977 923/OUTSIDE SERVICES PTOCAS - - -
978 924/PROPERTY INSURANCE
979 PRODUCTION-STEAM L 100 - - -
980 ALL RISK&MISCELLANEOUS P710P 426,708 409,500 17,208
981 TOTAL ACCOUNT 924
982
983 925/INJURIES&DAMAGES LABOR 146,518 140,242 6,276
984 926/EMPLOYEE PENSIONS&BENEFITS LABOR - - -
985 927/FRANCHISE REQUIREMENTS CIDA - - -
986 928/REGULATORY COMMISSION EXPENSES
987 FERC ADMIN ASSESSMENTS L 179 - - -
988 FERC RATE CASE EXPENSE RESREV - - -
989 SEC EXPENSES L 179 - - -
990 IDAHO PUC-RATE CASE CIDA - - -
991 -OTHER CIDA - - -
992 OREGON PUC-RATE CASE CODA - - -
993 -OTHER CODA - - -
994 TOTAL ACCOUNT 928
995
996 929/DUPLICATE CHARGES SUBEX - - -
997 930.1/GENERAL ADVERTISING RELAB - - -
998 930.2/MISCELLANEOUS EXPENSES PTOCAS 198,088 189,603 8,485
999 931/RENTS L 177 - - -
1000935/GENERAL PLANT MAINTENANCE P3908 1,228,809 1,176,596 52,212
1001 TOTAL ADMIN&GENERAL EXPENSES 60,937,902 58,329,159 2,608,743
1002 TOTAL OPER&MAINT EXPENSES 158,798,646 151,998,101 6,800,545
1003
1004 TOTAL LABOR-RATIO 1%) 1 1 0
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 31 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1005"'`TABLE 14-ALLOCATION FACTORS
1006
1007 CAPACITY RELATED KW
1008 PRODUCTION RELATED COINCIDENT PEAKS @ GENERATION LEVE DIO 2,563,697 2,462,382 101,315
1009 SYSTEM TRANSMISSION SERVICE @ GENERATION LEVEL D11 2,563,697 2,462,382 101,315
1010 RETAIL TRANSMISSION D12 2,563,697 2,462,382 101,315
1011 DISTRIBUTION SERVICE @ GENERATION LEVEL D60 2,424,088 2,334,493 89,595
1012
1013 ENERGY RELATED MWH
1014 GENERATION LEVEL(PSP) E10 16,435,689 15,742,270 693,419
1015 RETAIL MWH AT GENERATION LVL E100 16,435,689 15,742,270 693,419
1016 CUSTOMER LEVEL E99 15,410,622 14,757,250 653,372
1017
1018 CUSTOMER RELATED FACTORS
1019 369-DIRECT ASSIGNMENT DA369 70,650,589 67,740,904 2,909,686
1020 370-METER INVESTMENT ACCT370 115,905,804 112,356,866 3,548,937
1021 902-CUSTOMER WEIGHTED CW902 2,122,543 1,836,014 286,529
1022 903-CUSTOMER WEIGHTED CW903 16,141,973 15,613,975 527,998
1023 904-CUSTOMER WEIGHTED CW904 3,786,792 3,419,345 367,446
1024 909-DIRECT ASSIGN-AVG.NO.CUST. DA909 624,419 604,506 19,913
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 32 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1025-TABLE TABLE 14-ALLOCATION FACTORS
1026
1027 DIRECT ASSIGNMENTS
1028 252-CUSTOMER ADVANCES DA252 32,170,424 32,110,363 60,062
1029 350-LAND&LAND RIGHTS DA350 - - -
1030 352-STRUCTURES&IMPROVEMENTS DA352 658 - 658
1031 353-STATION EQUIPMENT DA353 111,594 75,100 36,494
1032 354-TOWERS&FIXTURES DA354 - - -
1033 355-POLES&FIXTURES DA355 33,842 - 33,842
1034 356-OVERHEAD CONDUCTORS&DEVICES DA356 26,495 1,189 25,306
1035 359-ROADS&TRAILS DA359 - - -
1036 360-LAND&LAND RIGHTS ACCT360 9,024,558 8,641,897 382,661
1037 361-STRUCTURES&IMPROVEMENTS ACCT361 62,286,419 59,574,241 2,712,178
1038 362-STATION EQUIPMENT ACCT362 333,778,528 320,186,976 13,591,552
1039 364-POLES,TOWERS&FIXTURES DA364 333,422,399 307,301,185 26,121,215
1040 365-OVERHEAD CONDUCTORS&DEVICES DA365 161,939,763 152,866,451 9,073,313
1041 366-UNDERGROUND CONDUIT DA366 55,753,674 54,858,172 895,502
1042 367-UNDERGROUND CONDUCTORS&DEVICES DA367 338,826,990 333,716,692 5,110,297
1043 368-LINE TRANSFORMERS ACCT368 750,275,508 709,131,796 41,143,712
1044 371-INSTALLATIONS ON CUSTOMER PREMISES DA371 5,271,974 4,926,363 345,611
1045 373-STREET LIGHTING SYSTEMS DA373 6,798,038 6,459,698 338,340
1046 451-REVENUE-MISCELLANEOUS SERVICE DA451 5,103,805 5,043,528 60,277
1047 454-REVENUE-FACILITIES CHARGE DA454 10,841,971 10,407,743 434,228
1048 908-OTHER CUSTOMER ASSISTANCE DA908 7,567,753 7,274,479 293,274
1049 440-RETAIL SALES REVENUE RETREV 1,283,843,868 1,230,016,095 53,827,773
1050 447-WHOLESALE SALES REVENUE RESREV - - -
1051 RIDER FUND DIRECT ASSIGNMENT DARIDER - - -
1052 411-BOARDMAN ARO ACCRETION EXP DAACCRETION 12,995 12,485 509
1053 403-BOARDMAN ARO DEPRECIATION EXP DAARO - - -
1054 IDAHO CIDA 1 1 -
1055 OREGON CODA 1 - 1
1056 NET TO GROSS TAX MULTIPLIER DA990 1 1 1
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 33 of 37

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1057—TABLE*TABLE 14-ALLOCATION FACTORS***
1058
1059 INTERNALLY DEVELOPED ALLOCATION FACTORS
1060 PLANT-PROD,TRANS&DIST PTO 6,383,232,307 6,112,007,526 271,224,781
1061 LAB-PROD,TRANS,DIST,CUSTACCT&CSIS PTDCAS 97,860,745 93,668,943 4,191,802
1062 PLANT-HYDRO,OTHER,TSUBS,DSUBS&GP P710P 3,040,787,236 2,918,158,498 122,628,738
1063 PLANT-GEN PLT(390,391,397&398) P3908 323,809,073 310,050,362 13,758,710
1064 PLANT-PROD,TRANS,DIST&GEN P1o1P 6,953,883,405 6,658,411,548 295,471,857
1065 O&M-PROD,TRANS,DIST,CUSTACCT&CSIS SUBEx 739,874,789 706,025,109 33,849,680
1066 LAB-PROD,TRANS,DIST,CUSTACCT&CSIS RELAB 97,860,745 93,668,943 4,191,802
1067 LAB-ALL LABOR WITHOUT925-6"CIRC" LABOR 158,225,421 151,448,360 6,777,061
1068 REV-RETAIL,RESALE&WHEELING FMREV 1,323,721,019 1,268,234,028 55,486,991
1069 O&M-ALL EXCEPT FUEL O&MM 745,935,548 712,456,451 33,479,097
1070 PLANT-89%*HYD PROD+II%*TRANS SURVEY 1,241,099,140 1,192,042,026 49,057,114
1071 O&M-TOTAL(NOT USED) OM401 934,441,471 893,018,187 41,423,284
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 34 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1072***TABLE 15-ALLOCATION FACTORS-RATIOS
1073
1074 CAPACITY RELATED KW
1075 PRODUCTION RELATED COINCIDENT PEAKS @ GENERATION LEVE D10 100.00% 96.05% 3.95%
1076 SYSTEM TRANSMISSION SERVICE @ GENERATION LEVEL D11 100.00% 96.05% 3.95%
1077 RETAIL TRANSMISSION D12 100.00% 96.05% 3.95%
1078 DISTRIBUTION SERVICE @ GENERATION LEVEL D60 100.00% 96.30% 3.70%
1079
1080 ENERGY RELATED MWH
1081 GENERATION LEVEL(PSP) E10 100.00% 95.78% 4.22%
1082 RETAIL MWH AT GENERATION LVL E100 100.00% 95.78% 4.22%
1083 CUSTOMER LEVEL E99 100.00% 95.76% 4.24%
1084
1085 CUSTOMER RELATED FACTORS
1086 369-DIRECT ASSIGNMENT DA369 100.00% 95.88% 4.12%
1087 370-METER INVESTMENT ACCT370 100.00% 96.94% 3.06%
1088 902-CUSTOMER WEIGHTED CW902 100.00% 86.50% 13.50%
1089 903-CUSTOMER WEIGHTED CW903 100.00% 96.73% 3.27%
1090 904-CUSTOMER WEIGHTED CW904 100.00% 90.30% 9.70%
1091 909-DIRECT ASSIGN-AVG.NO.CUST. DA909 100.00% 96.81% 3.19%
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 35 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1092-TABLE*TABLE 15-ALLOCATION FACTORS-RATIOS,.`
1093
1094 DIRECT ASSIGNMENTS
1095 252-CUSTOMER ADVANCES DA252 100.00% 99.81% 0.19%
1096 350-LAND&LAND RIGHTS DA350 #DIV/01 #DIV/0I #DIV/01
1097 352-STRUCTURES&IMPROVEMENTS DA352 100.00% 0.00% 100.00%
1098 353-STATION EQUIPMENT DA353 100.00% 67.30% 32.70%
1099 354-TOWERS&FIXTURES DA354 #DIV/01 #DIV/0I #DIV/01
1100 355-POLES&FIXTURES DA355 100.00% 0.00% 100.00%
1101 356-OVERHEAD CONDUCTORS&DEVICES DA356 100.00% 4.49% 95.51%
1102 359-ROADS&TRAILS DA359 #DIV/01 #DIV/0I #DIV/01
1103 360-LAND&LAND RIGHTS ACCT360 100.00% 95.76% 4.24%
1104 361-STRUCTURES&IMPROVEMENTS ACCT361 100.00% 95.65% 4.35%
1105 362-STATION EQUIPMENT ACCT362 100.00% 95.93% 4.07%
1106 364-POLES,TOWERS&FIXTURES DA364 100.00% 92.17% 7.83%
1107 365-OVERHEAD CONDUCTORS&DEVICES DA365 100.00% 94.40% 5.60%
1108 366-UNDERGROUND CONDUIT DA366 100.00% 98.39% 1.61%
1109 367-UNDERGROUND CONDUCTORS&DEVICES DA367 100.00% 98.49% 1.51%
1110 368-LINE TRANSFORMERS ACCT368 100.00% 94.52% 5.48%
1111 371-INSTALLATIONS ON CUSTOMER PREMISES DA371 100.00% 93.44% 6.56%
1112 373-STREET LIGHTING SYSTEMS DA373 100.00% 95.02% 4.98%
1113 451-REVENUE-MISCELLANEOUS SERVICE DA451 100.00% 98.82% 1.18%
1114 454-REVENUE-FACILITIES CHARGE DA454 100.00% 95.99% 4.01%
1115 908-OTHER CUSTOMER ASSISTANCE DA908 100.00% 96.12% 3.88%
1116 440-RETAIL SALES REVENUE RETREV 100.00% 95.81% 4.19%
1117 447-WHOLESALE SALES REVENUE RESREV #DIV/01 #DIV/0I #DIV/01
1118 IDAHO CIDA 100.00% 100.00% 0.00%
1119 OREGON CODA 100.00% 0.00% 100.00%
1120 NET TO GROSS TAX MULTIPLIER DA990 1.347 1.347 1.347
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 36 of 37

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1121 ***TABLE 15-ALLOCATION FACTORS-RATIOS
1122
1123 INTERNALLY DEVELOPED ALLOCATION FACTORS
1124 PLANT-PROD,TRANS&DIST PTD 100.00% 95.75% 4.25%
1125 LAB-PROD,TRANS,DIST,CUST ACCT&CSIS PTDCAS 100.00% 95.72% 4.28%
1126 PLANT-HYDRO,OTHER,TSUBS,DSUBS&GP P110P 100.00% 95.97% 4.03%
1127 PLANT-GEN PLT(390,391,397&398) P3908 100.00% 95.75% 4.25%
1128 PLANT-PROD,TRANS,DIST&GEN P101P 100.00% 95.75% 4.25%
1129 O&M-PROD,TRANS,DIST,CUSTACCT&CSIS SUBEX 100.00% 95.42% 4.58%
1130 LAB-PROD,TRANS,DIST,CUST ACCT&CSIS RELAB 100.00% 95.72% 4.28%
1131 LAB-ALL LABOR WITHOUT 925-6 'CIRC" LABOR 100.00% 95.72% 4.28%
1132 REV-RETAIL,RESALE&WHEELING FMREV 100.00% 95.81% 4.19%
1133 O&M-ALL EXCEPT FUEL O&M M 100.00% 95.51% 4.49%
1134 PLANT-89%*HYD PROD+11%*TRANS SURVEY 100.00% 96.05% 3.95%
1135 O&M-TOTAL(NOT USED) OM401 100.00% 95.57% 4.43%
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 37 of 37

BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION
CASE NO. IPC-E-24-07
IDAHO POWER COMPANY
LARKIN , DI
TESTIMONY
EXHIBIT NO. 7

IDAHO POWER COMPANY
INCREMENTAL ELECTRIC PLANT IN SERVICE
December 31, 2024
Account Description 2023 GRC Settled Dec 2024 Balance Incremental EPIS
301 Organization 5,703.01 5,703.01 0.00
302 Franchises and Consents 52,690,323.89 67,759,450.41 15,069,126.52
303 Miscellaneous Intangible Plant 52,524,883.01 75,434,751.62 22,909,868.62
TOTAL INTANGIBLE PLANT 105,220,909.91 143,199,905.04 37,978,995.13
310 Land and Land Rights 347,595.67
311 Structures and Improvements 37,303,704.94
312 Boiler Plant Equipment 185,403,956.25
314 Turbogenerator Units 56,378,666.21
315 Accessory electric Equipment 16,473,701.28
316 Misc Power Plant Equipment 8,423,945.60
TOTAL STEAM PRODUCTION PLANT 274,155,558 304,331,569.95 30,176,012.00
330 Land and Land Rights 31,696,880.98
331 Structures and Improvements 297,845,397.13
332 Reservoirs, Dams, Waterways 317,158,044.63
333 Waterwheel, Turbines, Generato 423,900,667.59
334 Accessory Electric Equipment 78,247,063.33
335 Misc Power Plant Equipment 34,161,516.98
336 Roads, Railroads and Bridges 20,628,658.86
TOTAL HYDRO PRODUCTION PLANT 1,092,528,822 1,203,638,229.50 111,109,407.39
340 LAND AND LAND RIGHTS 2,699,793.95
341 Structures and Improvements 157,205,257.97
342 Fuel Holders, Producers, Acces 10,416,686.06
343 Prime Movers 293,488,715.33
344 Generators 67,698,206.49
345 Accessory Electric Equipment 94,132,712.68
346 Misc Power Plant Equipment 7,985,361.28
TOTAL OTHER PRODUCTION PLANT 625,844,417 633,626,733.76 7,782,316.76
3501X Land 4,328,646.72
35020 Land Rights and Easements 41,039,057 39,138,710.42 3,823,203.69
35022 Transm ROW Renewal Cost 1,394,903.80
352 Structures and Improvements 100,562,285 109,288,682.47 8,726,397.74
353 Station Equipment 468,500,193 507,541,457.65 39,041,265.10
354 Towers and Fixtures 237,158,275 254,182,187.22 17,023,911.98
355 Poles and Fixtures 236,066,559 271,608,628.69 35,542,070.09
356 Overhead Conductors, Devices 271,757,281 292,997,097.29 21,239,816.10
359 Roads and Trails 390,266 405,090.98 14,824.80
TOTAL TRANSMISSION PLANT 1,355,473,916 1,480,885,405.25 125,411,489.51
360 Land and Land Rights 9,601,720 10,392,399.49 790,679.41
361 Structures and improvements 62,384,614 73,907,861.51 11,523,247.16
362 Station Equipment 343,076,495 370,688,639.07 27,612,143.60
TOTAL SUBSTATION EQUIPMENT 415,062,830 454,988,900.07 39,926,070.17
363 Storage Battery Equipment 112,074,984 367,353,311.98 255,278,328.33
TOTAL STORAGE BATTERY EQUIPMENT
364 Poles, Towers and Fixtures 334,235,525 367,617,271.69 33,381,746.58
365 Overhead Conductors, Devices 162,758,591 173,759,820.73 11,001,229.42
366 Underground Conduit 54,848,113 61,422,626.86 6,574 14
�h14.ibit 7
Case No.IPC-E-24-07
M.Larkin, IPC
Page 1 of 2

367 Underground Conductors, Device 338,877,918 385,122,437.95 46,244,519.88
368 Line Transformers 745,644,817 819,847,335.92 74,202,519.29
369 Services 69,707,265 73,940,381.53 4,233,116.89
37000 Meters 20,114,093.15
37010 Meters-AM 116,503,219 105,259,706.82 8,870,580.99
371 Installations, Cust Premises 4,646,860 5,878,905.03 1,232,045.35
373 Street Lighting, Signal System 6,313,711 7,136,611.15 822,900.13
TOTAL DISTRIBUTION LINES 1,833,536,018 2,020,099,190.82 186,563,172.67
389 Land and Land Rights 20,940,797 21,077,173.52 136,376.58
390 Structures and Improvements 170,196,006 187,603,356.39 17,407,350.64
391 Office Furniture, Equipment 41,438,522 45,895,872.77 4,457,350.41
392 Transportation Equipment 119,914,591 146,232,891.07 26,318,299.96
393 Stores Equipment 5,476,857 8,997,577.75 3,520,720.79
394 Tools, Shop, Garage Equipment 15,380,479 16,583,328.91 1,202,850.02
395 Laboratory Equipment 14,914,034 16,747,259.21 1,833,225.66
396 Power Operated Equipment 27,588,092 31,516,343.02 3,928,251.12
397 Communication Equipment 82,670,542 89,930,528.21 7,259,986.61
398 Miscellaneous Equipment 11,406,368 11,482,711.48 76,343.94
TOTAL GENERAL EQUIPMENT PLANT 509,926,287 576,067,042.33 66,140,755.74
SUBTOTAL W/O ARO 6,323,823,741 7,184,190,288.70 860,366,548
Exhibit No.7
Case No.IPC-E-24-07
M.Larkin, IPC
Page 2 of 2

BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION
CASE NO. IPC-E-24-07
IDAHO POWER COMPANY
LARKIN , DI
TESTIMONY
EXHIBIT NO. 8

Incremental Labor Determination
Total2024 2023 2024
FERC Account Account Description O&M Labor Settlement Incremental
500001 Opr Pwr Prd Stm Gnr S&e-bridge - 11,455 (11,455)
500002 Opr Pwr Prd Stm Gnr S&e-board 119,076 96,745 22,331
500003 Opr Pwr Prd Stm Gnr S&e-valmy - 7,163 (7,163)
506003 Opr Pwr Prd Stm Gnr Msc-valmy - 139 (139)
535000 Opr Pwr Prd Hyd Pwr Gnr S&e 5,071,877 4,956,942 114,935
536000 Opr Pwr Prd Hyd Pwr Gnr Wtr Fp 177,428 176,702 726
536001 Opr Pwr Prd Hyd Cloudseeding 851,772 854,383 (2,611)
537000 Opr Pwr Prd Hyd Pwr Gnr Hyd 7,921,204 7,443,522 477,683
538000 Opr Pwr Prd Hyd Pwr Gnr El PI 2,043,598 1,801,400 242,198
539000 Opr Pwr Prd Hyd Pwr Gnr Misc 4,512,124 4,022,565 489,559
541000 Mnt Pwr Prd Hyd Pwr Gnr S&e 203,078 104,038 99,040
542000 Mnt Pwr Prd Hyd Pwr Gnr Strc 695,374 689,550 5,823
543000 Mnt Pwr Prd Hyd Pwr Gnr 388,415 302,571 85,844
544000 Mnt Pwr Prd Hyd Pwr Gnr El PI 2,091,697 2,105,412 (13,715)
545000 Mnt Pwr Prd Hyd Pwr Gnr Msc PI 2,790,986 2,619,430 171,556
546000 Opr Pwr Prd Othr Pwr Gnr S&e 709,301 609,948 99,353
548000 Opr Pwr Prd Othr Gnr 4,179,990 3,738,956 441,033
549000 Opr Pwr Prd Othr Gnr Msc 603,657 431,985 171,671
552000 Mnt Pwr Prd Othr Pwr Strc 57,499 53,429 4,070
553000 Mnt Pwr Prd Othr Pwr Gnr Gn&el 74,475 69,314 5,162
554000 Mnt Pwr Prd Oth Pwr Msc 613,733 554,042 59,691
557000 Opr Pwr Prd Oth Pwr Sp Oth Prd 5,816,830 5,226,939 589,891
560000 Opr Trns S&e 2,780,515 2,777,635 2,879
561200 Opr Trns-Load Dsptch-Monitor 3,373,046 2,842,838 530,207
561300 Opr Trns-Load Dsptch-Svc/Schd 435,990 536,073 (100,083)
561700 Opr Trns-Gen Intercnct Study 266,712 157,119 109,593
562000 Opr Trns Station Expenses 2,331,939 2,272,101 59,838
563000 Opr Trns Overhead Lines 603,510 505,284 98,225
568000 Mnt Trns S&e-mnt Trns S 170,055 105,816 64,239
569100 Mnt Trns Computer Hardware 25,156 28,021 (2,864)
569200 Mnt Trns Computer Software 1,678,905 1,637,358 41,547
569300 Mnt Trns-Comm Equipment 5,715 6,388 (673)
570000 Mnt Trns St Equp 3,171,421 2,720,699 450,722
571000 Maint Trans O/h Lines 1,315,416 1,048,408 267,008
573000 Mnt Trns Msc PI-other 1,337 4,259 (2,922)
580000 Opr Dstr Super&Engineering 3,923,571 3,522,183 401,388
581000 Opr Dstr Load Dispatching 6,258,508 5,395,277 863,231
582000 Opr Dstr Station Expenses 1,248,745 1,150,537 98,208
583000 Opr Dstr Overhead Line Exp 4,250,710 4,042,871 207,838
584000 Opr Dstr Undgrnd Ln Exp 1,912,171 1,551,681 360,490
585000 Opr Dstr Str Lt&Sgnl 2,392 24,691 (22,299)
586000 Opr Dstr Mtr Exp 5,705,346 4,843,487 861,859
587000 Opr Dstr Cust Installation 1,030,587 864,599 165,988
588000 Opr Dstr Msc Exp 3,629,610 3,430,741 198,869
590000 Mnt Dstr S&e 9,340 11,002 (1,662)
592000 Mnt Dstr St Equp 3,997,555 3,164,754 832,801
593000 Mnt Dstr Overhead Lines 6,736,276 6,239,308 496,969
594000 Mnt Dstr Underground Lines 442,387 427,358 15,029
595000 Mnt Dstr Ln Trnsfmrs 29,751 29,370 381
596000 Mnt Dstr Street Light&Signal 115,383 148,234 (32,851)1 Exhibit No. 8
Case No. IPC-E-24-07
M. Larkin, IPC
Page 1 of 2

Incremental Labor Determination
Total 2024 2023 2024
FERC Account Account Description O&M Labor Settlement Incremental
597000 Mnt Dstr Mtrs 935,752 795,630 140,121
598000 Mnt Dstr Msc-nt Grd Lt 128,594 95,035 33,559
901000 Opr Cust Acts&Sry Exp-spivs 949,406 834,306 115,100
902000 Opr Cust Acts&Sry Mtr Rdng 1,519,698 1,492,691 27,007
903000 Opr Cust Records&Coll Exp 11,910,965 10,740,459 1,170,506
907000 Opr Cust Srv-supervision 998,447 969,984 28,463
908000 Opr Cust Srv-cust Assist Exp 1.) 10,247,639 8,975,081 1,272,558
910000 Opr Cust Sry&Info 464,445 367,037 97,408
920000 Opr Admin&General Salaries 79,606,390 72,382,948 7,223,442
920001 Incentive 10,845,454 10,040,205 805,249
921000 Opr A&G Office Supp&Exp 11,118 290 10,828
921002 Opr A&g-Airplane Clearing 517,689 298,125 219,564
922999 P/r Bene Trnsfrd-cr (46,062,855) (36,723,488) (9,339,367)
924000 Opr A&g Prpty Ins-other 514,241 447,587 66,654
925000 Opr A&g Injrs&Dmgs 176,557 157,805 18,752
926104 Opr A&g Emp Pen&Ben-awrd/gft 509,793 549,591 (39,798)
926110 Opr A&g Emp Pen&Ben-If Ins (652,946) (836,860) 183,914
926111 Opr A&g Emp Pen&Ben-ret Life 230,484 82,292 148,193
926112 Opr A&g-emp Pen&Ben-tuition 67,347 83,093 (15,747)
926113 OprA&g-emp Pen&Ben-Med-Ibnr 707,608 536,000 171,608
926114 OprA&g-emp Pen&Ben-Den-Ibnr 5,113 (24,632) 29,746
926118 OPR A&G EMP PEN&BEN-HSA EC 2,034,807 1,922,771 112,036
926119 OPR A&G EMP PEN&BEN-VISION 318,570 192,953 125,617
926120 OprA&g Emp Pen&Ben-medical 25,312,720 21,319,943 3,992,776
926122 OprA&g Emp Pen&Ben-ret Med 1,868,931 521,152 1,347,779
926130 OprA&g Emp Pen&Ben-disablty 1,063,523 466,608 596,915
926141 OprA&g Emp Pen&Benefits-esp 10,624,980 9,186,078 1,438,901
926150 OprA&g Emp Pen&Ben-dental 1,873,910 1,845,528 28,382
926151 Opr A&g Emp Pen&Ben-ret Den 510,824 229,467 281,357
926160 Opr A&G Emp Pen&Ben-Fbap Adm 22,046 21,873 173
926180 Opr A&g Emp Pen&Ben-asst Pg 139,059 129,978 9,081
930200 OprA&g Msc Gnrl Exp 219,173 231,349 (12,177)
935000 MntA&g General Plant 1,486,545 1 1,227,049 1 259,496
Grand Total 213,480,186 1 193,922,651 1 19,557,535
1.)Added 2023 DSM labor charged to 254201 Idaho EE Rider account to appropriately allocate 2024 O&M
labor that includes DSM labor formerly charged to the Rider.
Exhibit No. 8
Case No. IPC-E-24-07
M. Larkin, IPC
Page 2of2

BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION
CASE NO. IPC-E-24-07
IDAHO POWER COMPANY
LARKIN , DI
TESTIMONY
EXHIBIT NO. 9

IDAHO POWER COMPANY
INCREMENTAL REVENUE ASSOCIATED WITH LOAD GROWTH
2023 ID kWh Sales
14,907,835,244
Mill Rate (Rate Base and Labor Only Rev Reg/Sales)
0.0440775
Incremental 2024 ID kWh Sales
124,724,470
Incremental 2024 Revenues
$ 5,497,548
Exhibit No. 9
Case No. IPC-E-24-07
M. Larkin, IPC
Page 1 of 1

BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION
CASE NO. IPC-E-24-07
IDAHO POWER COMPANY
LARKIN , DI
TESTIMONY
EXHIBIT NO. 10

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
1
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
4 SUMMARY OF RESULTS
5 RATE OF RETURN UNDER PRESENT RATES
6 TOTAL COMBINED RATE BASE 763,200,310 730,792,519 32,407,792
7
8 OPERATING REVENUES
9 FIRM JURISDICTIONAL SALES 5,497,548 5,497,548 0
10 SYSTEM OPPORTUNITY SALES 0 0 0
11 OTHER OPERATING REVENUES 0 0 0
12 TOTAL OPERATING REVENUES 5,497,548 5,497,548 0
13 OPERATING EXPENSES
14 OPERATION&MAINTENANCE EXPENSES 19,557,535 18,759,267 798,267
15 DEPRECIATION EXPENSE 21,088,273 20,210,085 878,189
16 AMORTIZATION OF LIMITED TERM PLANT 2,265,315 2,169,836 95,479
17 TAXES OTHER THAN INCOME 0 0 0
18 REGULATORY DEBITS/CREDITS 0 0 0
19 PROVISION FOR DEFERRED INCOME TAXES 3,173,455 3,039,028 134,427
20 INVESTMENT TAX CREDIT ADJUSTMENT 73,978,000 70,844,300 3,133,700
21 FEDERAL INCOME TAXES (82,058,780) (78,545,328) (3,513,452)
22 STATE INCOME TAXES (10,668,322) (10,205,030) (463,292)
23 TOTAL OPERATING EXPENSES 27,335,476 26,272,158 1,063,317
24 OPERATING INCOME (21,837,928) (20,774,610) (1,063,317)
25 ADD: IERCO OPERATING INCOME 0 0 0
26 CONSOLIDATED OPERATING INCOME (21,837,928) (20,774,610) (1,063,317)
27 RATE OF RETURN UNDER PRESENT RATES -2.86% -2.84% -3.28%
28
29 DEVELOPMENT OF REVENUE REQUIREMENTS
30 RATE OF RETURN @ 9.6%ROE 7.247% 7.247% 7.247%
31
32 RETURN 55,309,127 52,960,534 2,348,593
33 EARNINGS DEFICIENCY 77,147,054 73,735,144 3,411,910
34 ADD:CWIP (HELLS CANYON RELICENSING) D10 0 0 0
35 EARNINGS DEFICIENCY WITH CWIP 77,147,054 73,735,144 3,411,910
36
37 NET-TO-GROSS TAX MULTIPLIER 1.347 1.347 1.347
38 REVENUE DEFICIENCY 103,887,766 99,293,220 4,594,546
39
40 ADD:VALMY REVENUE REQUIREMENT CIDA 0 0 0
41 ADD:BRIDGER REVENUE REQUIREMENT CIDA 0 0 0
42 LESS:BATTERY ADITC MITIGATION CIDA 0 0 0
43 REVENUE DEFICIENCY LESS ADJUSTMENTS 103,887,766 99,293,220 4,594,546
44
45
46
47
48
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Pagel of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
49 SUMMARY OF RESULTS
50 DEVELOPMENT OF RATE BASE COMPONENTS
51 ELECTRIC PLANT IN SERVICE
52 INTANGIBLE PLANT 37,978,995 36,393,810 1,585,185
53 PRODUCTION PLANT 149,067,736 142,986,714 6,081,022
54 TRANSMISSION PLANT 125,411,490 120,295,493 5,115,997
55 DISTRIBUTION PLANT 481,767,571 460,930,056 20,837,515
56 GENERAL PLANT 66,140,756 63,339,040 2,801,715
57 TOTAL ELECTRIC PLANT IN SERVICE 860,366,548 823,945,114 36,421,434
58 LESS:ACCUM PROVISION FOR DEPRECIATION 88,598,095 84,945,117 3,652,978
59 AMORT OF OTHER UTILITY PLANT 5,394,687 5,168,451 226,237
60 NET ELECTRIC PLANT IN SERVICE 766,373,765 733,831,546 32,542,219
61 LESS:CUSTOMER ADV FOR CONSTRUCTION 0 0 0
62 LESS:ACCUM DEFERRED INCOME TAXES 3,173,455 3,039,028 134,427
63 ADD:PLT HLD FOR FUTURE+ACQUIS ADJ 0 0 0
64 ADD:WORKING CAPITAL 0 0 0
65 ADD:CONSERVATION+OTHER DFRD PROG. 0 0 0
66 ADD:SUBSIDIARY RATE BASE 0 0 0
67 TOTAL COMBINED RATE BASE 763,200,310 730,792,519 32,407,792
68
69 DEVELOPMENT OF NET INCOME COMPONENTS
70 OPERATING REVENUES
71 SALES REVENUES 5,497,548 5,497,548 0
72 OTHER OPERATING REVENUES 0 0 0
73 TOTAL OPERATING REVENUES 5,497,548 5,497,548 0
74 OPERATING EXPENSES
75 OPERATION&MAINTENANCE EXPENSES 19,557,535 18,759,267 798,267
76 DEPRECIATION EXPENSE 21,088,273 20,210,085 878,189
77 AMORTIZATION OF LIMITED TERM PLANT 2,265,315 2,169,836 95,479
78 TAXES OTHER THAN INCOME 0 0 0
79 REGULATORY DEBITS/CREDITS 0 0 0
80 PROVISION FOR DEFERRED INCOME TAXES 3,173,455 3,039,028 134,427
81 INVESTMENT TAX CREDIT ADJUSTMENT 73,978,000 70,844,300 3,133,700
82 FEDERAL INCOME TAXES (82,058,780) (78,545,328) (3,513,452)
83 STATE INCOME TAXES (10,668,322) (10,205,030) (463,292)
84 TOTAL OPERATING EXPENSES 27,335,476 26,272,158 1,063,317
85 OPERATING INCOME (21,837,928) (20,774,610) (1,063,317)
86 ADD: IERCO OPERATING INCOME E10 0 0 0
87 CONSOLIDATED OPERATING INCOME (21,837,928) (20,774,610) (1,063,317)
88
89 NET POWER SUPPLY COSTS:
90 ACCT447/SURPLUS SALES 0 0 0
91 ACCT 501/FUEL-THERMAL PLANTS 0 0 0
92 ACCT 547/FUEL-OTHER 0 0 0
93 ACCT 555/NON-FIRM PURCHASES 0 0 0
94 ACCT 555/DEMAND RESPONSE INCENTIVE 0 0 0
95 ACCT 555/CSPP PURCHASES 0 0 0
96 SUBTOTAL 0 0 0
97 ACCT 536/WATER FOR POWER(PCA&OTHER) 0 0 0
98 ACCT 565/TRANS OF ELECTRICTY BY OTHERS 0 0 0
99 TOTAL NET POWER SUPPLY COSTS 0 0 0
100 OTHER O&M Exhibit No.10
101 TOTAL O&M EXPENSES 19,557,535 18,759,267 798,267 Case No.IPC-E-24-07
102 LESS: ACCT 501/FUEL-THERMAL PLANTS 0 0 0 M.Larkin,IPC
2024 Page 2 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
103 ACCT 547/FUEL-OTHER 0 0 0
104 ACCT 555/NON-FIRM PURCHASES 0 0 0
105 ACCT 555/DEMAND RESPONSE INCENTIVE 0 0 0
106 ACCT 555/CSPP PURCHASES 0 0 0
107 SUBTOTAL 19,557,535 18,759,267 798,267
108 ACCT 536/WATER FOR POWER(PCA&OTHER) 0 0 0
109 ACCT 565/TRANS OF ELECTRICTY BY OTHERS 0 0 0
110 ACCT416/MERCHANDISING EXPENSE 0 0 0
111 NET OTHER O&M 19,557,535 18,759,267 798,267
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 3 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
112 TABLE 1-ELECTRIC PLANT/N SERVICE (386,020,032)
113 INTANGIBLE PLANT
114 301-ORGANIZATION P101 P $ - 0 0
115 302-FRANCHISES&CONSENTS D10 15,069,127 14,454,401 614,725
116 303-MISCELLANEOUS P101 P 22,909,869 21,939,409 970,460
117
118 TOTAL INTANGIBLE PLANT 37,978,995 36,393,810 1,585,185
119
120 PRODUCTION PLANT
121 310-316/STEAM PRODUCTION D10 30,176,012 28,945,021 1,230,991
122 330-336/HYDRAULIC PRODUCTION D10 111,109,407 106,576,845 4,532,562
123 340-346/OTHER PRODUCTION-BASE LOAD D10 5,460,179 5,237,439 222,741
124 340-346/OTHER PRODUCTION-PEAKERS D10 2,322,137 2,227,409 94,729
125
126 TOTAL PRODUCTION PLANT 149,067,736 142,986,714 6,081,022
127
128 TRANSMISSION PLANT
129 350/LAND&LAND RIGHTS-SYSTEM SERVICE D11 3,823,204 3,667,241 155,963
130 DIRECT ASSIGNMENT DA350 0 0 0
131 TOTAL ACCOUNT 350 3,823,204 3,667,241 155,963
132
133 352/STRUCTURES&IMPROVEMENTS-SYSTEM SERVICE D11 8,726,398 8,370,416 355,982
134 DIRECT ASSIGNMENT DA352 0 0 0
135 TOTAL ACCOUNT 352 8,726,398 8,370,416 355,982
136
137 353/STATION EQUIPMENT-SYSTEM SERVICE D11 39,041,265 37,448,628 1,592,637
138 DIRECT ASSIGNMENT DA353 0 0 0
139 TOTAL ACCOUNT 353 39,041,265 37,448,628 1,592,637
140
141 354/TOWERS&FIXTURES-SYSTEM SERVICE D11 17,023,912 16,329,444 694,468
142 DIRECT ASSIGNMENT DA354 0 0 0
143 TOTAL ACCOUNT 354 17,023,912 16,329,444 694,468
144
145 355/POLES&FIXTURES-SYSTEM SERVICE D11 35,542,070 34,092,178 1,449,892
146 DIRECT ASSIGNMENT DA355 0 0 0
147 TOTAL ACCOUNT 355 35,542,070 34,092,178 1,449,892
148
149 356/OVERHEAD CONDUCTORS&DEVICES-SYSTEM SERVICE D11 21,239,816 20,373,366 866,450
150 DIRECT ASSIGNMENT DA356 0 0 0
151 TOTAL ACCOUNT 356 21,239,816 20,373,366 866,450
152
153 359/ROADS&TRAILS-SYSTEM SERVICE D11 14,825 14,220 605
154 DIRECT ASSIGNMENT DA359 0 0 0
155 TOTAL ACCOUNT 359 14,825 14,220 605
156
157 TOTAL TRANSMISSION PLANT 125,411,490 120,295,493 5,115,997
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 4 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
158 TABLE 1-ELECTRIC PLANT/N SERVICE
159
160 DISTRIBUTION PLANT
161 360/LAND&LAND RIGHTS-SYSTEM SERVICE ACCT360 790,679 763,476 27,203
162 PLUS:ADJUSTMENT FOR CIAC ACCT360CIAC 0 0 0
163 DISTRIBUTION PLANT+CIAC 790,679 763,476 27,203
164
165 361/STRUCTURES&IMPROVEMENTS-SYSTEM SERVICE ACCT361 11,523,247 10,978,691 544,557
166 PLUS:ADJUSTMENT FOR CIAC ACCT361CIAC 0 0 0
167 DISTRIBUTION PLANT+CIAC 11,523,247 10,978,691 544,557
168
169 362/STATION EQUIPMENT-SYSTEM SERVICE ACCT362 27,612,144 26,449,129 1,163,015
170 PLUS:ADJUSTMENT FOR CIAC ACCT362CIAC 0 0 0
171 DISTRIBUTION PLANT+CIAC 27,612,144 26,449,129 1,163,015
172
173 363/STORAGE BATTERY EQUIPMENT D10 255,278,328 244,864,585 10,413,743
174 TOTAL BATTERY STORAGE EQUIPMENT 255,278,328 244,864,585 10,413,743
175
176 364/POLES,TOWERS&FIXTURES DA364 33,381,747 30,775,202 2,606,544
177 365/OVERHEAD CONDUCTORS&DEVICES DA365 11,001,229 10,372,809 628,420
178 366/UNDERGROUND CONDUIT DA366 6,574,514 6,471,533 102,981
179 367/UNDERGROUND CONDUCTORS&DEVICES DA367 46,244,520 45,557,642 686,878
180 368/LINE TRANSFORMERS DA368 74,202,519 70,108,375 4,094,144
181 369/SERVICES DA369 4,233,117 4,067,481 165,636
182 370/METERS DA370 8,870,581 8,584,046 286,535
183 371/INSTALLATIONS ON CUSTOMER PREMISES DA371 1,232,045 1,147,044 85,001
184 373/STREET LIGHTING SYSTEMS DA373 822,900 790,042 32,858
185
186 TOTAL DISTRIBUTION PLANT(without CIAC) 481,767,571 460,930,056 20,837,515
187
188 GENERALPLANT
189 389/LAND&LAND RIGHTS PTD 136,377 130,600 5,777
190 390/STRUCTURES&IMPROVEMENTS PTD 17,407,351 16,669,977 737,374
191 391/OFFICE FURNITURE&EQUIPMENT PTD 4,457,350 4,268,538 188,813
192 392/TRANSPORTATION EQUIPMENT PTD 26,318,300 25,203,460 1,114,840
193 393/STORES EQUIPMENT PTD 3,520,721 3,371,583 149,137
194 394/TOOLS,SHOP&GARAGE EQUIPMENT PTD 1,202,850 1,151,897 50,953
195 395/LABORATORY EQUIPMENT PTD 1,833,226 1,755,570 77,655
196 396/POWER OPERATED EQUIPMENT PTD 3,928,251 3,761,851 166,400
197 397/COMMUNICATIONS EQUIPMENT PTD 7,259,987 6,952,454 307,532
198 398/MISCELLANEOUS EQUIPMENT PTD 76,344 73,110 3,234
199
200 TOTAL GENERAL PLANT 66,140,756 63,339,040 2,801,715
201
202 TOTAL ELECTRIC PLANT IN SERVICE(without CIAC) 860,366,548 823,945,114 36,421,434
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 5 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
203 TABLE 2-ACCUMULATED PROVISION FOR DEPRECIATION
204
205 PRODUCTION PLANT
206 310-316/STEAM PRODUCTION L 121 38,829,782 37,245,772 1,584,010
207 330-336/HYDRAULIC PRODUCTION L 122 23,502,564 22,543,808 958,756
208 340-346/OTHER PRODUCTION-BASE LOAD L 123 (9,142,916) (8,769,943) (372,973)
209 340-346/OTHER PRODUCTION-PEAKERS L 124 (3,888,354) (3,729,733) (158,620)
210 TOTAL PRODUCTION PLANT 49,301,076 47,289,903 2,011,172
211
212 TRANSMISSION PLANT
213 350/LAND&LAND RIGHTS L 131 438,309 420,429 17,880
214 352/STRUCTURES&IMPROVEMENTS L 135 1,119,495 1,073,827 45,668
215 353/STATION EQUIPMENT L 139 914,188 876,895 37,293
216 354/TOWERS&FIXTURES L 143 2,162,756 2,074,529 88,227
217 355/POLES&FIXTURES L 147 1,282,452 1,230,137 52,316
218 356/OVERHEAD CONDUCTORS&DEVICES L 151 (643,591) (617,336) (26,254)
219 359/ROADS&TRAILS L 155 2,744 2,632 112
220 TOTAL TRANSMISSION PLANT 5,276,353 5,061,111 215,242
221
222 DISTRIBUTION PLANT
223 360/LAND&LAND RIGHTS L 161 28,342 27,367 975
224 361/STRUCTURES&IMPROVEMENTS L 165 822,436 783,570 38,866
225 362/STATION EQUIPMENT L 169 3,129,730 2,997,907 131,823
226 363/STORAGE BATTERY EQUIPMENT L 173 5,219,455 5,006,534 212,921
227 364/POLES,TOWERS&FIXTURES L 176 1,173,924 1,082,261 91,663
228 365/OVERHEAD CONDUCTORS&DEVICES L 177 1,099,933 1,037,102 62,831
229 366/UNDERGROUND CONDUIT L 178 468,344 461,008 7,336
230 367/UNDERGROUND CONDUCTORS&DEVICES L 179 3,574,819 3,521,721 53,097
231 368/LINE TRANSFORMERS L 180 5,739,011 5,422,360 316,652
232 369/SERVICES L 181 978,886 940,584 38,302
233 370/METERS L 182 2,343,243 2,267,552 75,691
234 371/INSTALLATIONS ON CUSTOMER PREMISES L 183 (59,426) (55,326) (4,100)
235 373/STREET LIGHTING SYSTEMS L 184 897,258 861,431 35,827
236 TOTAL DISTRIBUTION PLANT 25,415,955 24,354,070 1,061,885
237
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 6 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
238 TABLE 2-ACCUMULATED PROVISION FOR DEPRECIATION
239
240 GENERALPLANT
241 389/LAND&LAND RIGHTS L 189 0 0 0
242 390/STRUCTURES&IMPROVEMENTS L 190 1,040,569 996,490 44,078
243 391/OFFICE FURNITURE&EQUIPMENT L 191 912,215 873,574 38,641
244 392/TRANSPORTATION EQUIPMENT L 192 1,760,108 1,685,550 74,558
245 393/STORES EQUIPMENT L 193 218,505 209,249 9,256
246 394/TOOLS,SHOP&GARAGE EQUIPMENT L 194 439,176 420,573 18,603
247 395/LABORATORY EQUIPMENT L 195 412,494 395,021 17,473
248 396/POWER OPERATED EQUIPMENT L 196 1,148,778 1,100,116 48,662
249 397/COMMUNICATIONS EQUIPMENT L 197 2,849,017 2,728,333 120,684
250 398/MISCELLANEOUS EQUIPMENT L 198 120,148 115,059 5,089
251 TOTAL GENERAL PLANT 8,901,011 8,523,965 377,046
252
253 AMORTIZATION OF DISALLOWED COSTS L 118 (296,299) (283,932) (12,367)
254
255 TOTAL ACCUM PROVISION DEPRECIATION 88,598,095 84,945,117 3,652,978
256
257 AMORTIZATION OF OTHER UTILITY PLANT
258 302/FRANCHISES AND CONSENTS L 115 1,456,720 1,397,295 59,425
259 303/MISCELLANEOUS INTANGIBLE PLANT L 116 3,937,967 3,771,155 166,812
260
261 TOTAL AMORT OF OTHER UTILITY PLANT 5,394,687 5,168,451 226,237
262
263 TOTAL ACCUM PROVISION FOR DEPR
264 &AMORTIZATION OF OTHER UTILITY PLANT 93,992,783 90,113,568 3,879,215
265
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 7 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
266 TABLE 3-ADDITIONS&DEDUCTIONS TO RATEBASE
267
268 NET ELECTRIC PLANT IN SERVICE 766,373,765 733,831,546 32,542,219
269 LESS:
270 252 CUSTOMER ADVANCES FOR CONSTRUCTION
271 POWER SUPPLY D10 0 0 0
272 OTHER DA252 0 0 0
273 TOTAL CUSTOMER ADV FOR CONSTRUCTION 0 0 0
274
275 ACCUMULATED DEFERRED INCOME TAXES
276 190/ACCUMULATED DEFERRED INCOME TAXES
277 CUSTOMER ADVANCES FOR CONSTUCTION DA252 0 0 0
278 OTHER LABOR 0 0 0
279 TOTAL ACCOUNT190 0 0 0
280 281/ACCELERATED AMORTIZATION P101 P 0 0 0
281 282/OTHER PROPERTY P101 P 3,173,455 3,039,028 134,427
282 283/OTHER P101 P 0 0 0
283 TOTAL ACCUM DEFERRED INCOME TAXES 3,173,455 3,039,028 134,427
284
285 NET ELECTRIC PLANT IN SERVICE 763,200,310 730,792,518 32,407,792
286 ADD:
287 WORKING CAPITAL
288 151/FUEL INVENTORY E10 0 0 0
289 154&163/PLANT MATERIALS&SUPPLIES
290 PRODUCTION-GENERAL L 126 0 0 0
291 TRANSMISSION-GENERAL L 157 0 0 0
292 DISTRIBUTION-GENERAL L 186+CIAC 0 0 0
293 OTHER-UNCLASSIFIED L 202 0 0 0
294 TOTAL ACCOUNT 154&163 0 0 0
295 165/PREPAID ITEMS
296 AD VALOREM TAXES L 700 0 0 0
297 OTHER PROD-RELATED PREPAYMENTS D10 0 0 0
298 INSURANCE L 126 0 0 0
299 PENSION EXPENSE L 1042 0 0 0
300 PREPAID RETIREE BENEFITS L 1042 0 0 0
301 MISCELLANEOUS PREPAYMENTS P101P 0 0 0
302 TOTAL ACCOUNT165 0 0 0
303 WORKING CASH ALLOWANCE L 621 0 0 0
304
305 TOTAL WORKING CAPITAL 0 0 0
306
307 NET ELECTRIC PLANT IN SERVICE 763,200,310 730,792,518 32,407,792
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 8 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
308 TABLE 3-ADDITIONS&DEDUCTIONS TO RATEBASE
309
310 NET ELECTRIC PLANT IN SERVICE 763,200,310 730,792,518 32,407,792
311 ADD:
312 105/PLANT HELD FOR FUTURE USE
313 HYDRAULIC PRODUCTION L 122 0 0 0
314 TRANS LAND&LAND RIGHTS L 131 0 0 0
315 TRANS STRUCTURES&IMPROVEMENTS L 135 0 0 0
316 TRANS STATION EQUIPMENT L 139 0 0 0
317 DIST LAND&LAND RIGHTS L 163 0 0 0
318 DIST STRUCTURES&IMPROVEMENTS L 167 0 0 0
319 DIST STATIONS EQUIPMENT 0
320 GEN LAND&LAND RIGHTS L 189 0 0 0
321 GEN STRUCTURES&IMPROVEMENTS L 190 0 0 0
322 COMMUNICATION L 192 0 0 0
323 TOTAL PLANT HELD FOR FUTURE USE 0 0 0
324
325 114/115-ASSET EXCHANGE ACQUISITION ADJUSTMENT CIDA 0 0 0
326
327 DEFERRED PROGRAMS:
328 182/ CONSERVATION PROGRAMS
329 IDAHO DEFERRED CONSERVATION PROGRAMS CIDA 0 0 0
330 OREGON DEFERRED CONSERVATION PROGRAMS CODA 0 0 0
331 TOTAL CONSERVATION PROGRAMS 0 0 0
332 182&186/MISC.OTHER REGULATORY ASSETS
333 CUB FUND INTEREST(OPUC 15-399) CODA 0 0 0
334 AM.FALLS BOND REFINANCING D10 0 0 0
335 SFAS 87 CAPITALIZED PENSION-OPUC ORDER 10-064 CODA 0 0 0
336 CLOUD COMPUTING-(IPUC Order 34707) CIDA 0 0 0
337 WILDFIRE MITIGATION(IPUC Order 35077) CIDA 0 0 0
338 SIEMENS LTP RATE BASE(IPUC Order 33420) CIDA 0 0 0
339 SIEMENS LTP DEFERRED RATE BASE(IPUC Order 33420) CIDA 0 0 0
340 SIEMENS LTP RATE BASE(OPUC ORDER 15-387) CODA 0 0 0
341 SIEMENS LTP DEFERRED RATE BASE(OPUC ORDER 15-387) CODA 0 0 0
342 TOTAL OTHER REGULATORY ASSETS 0 0 0
343 186/MISC.OTHER DEFERRED PROGRAMS 0 0 0
344 254/JIM BRIDGER PLANT END OF LIFE DEPR-OPUC ORD 12-296 CODA 0 0 0
345 RECONNECT FEES-(OPUC ADV 16-09) CODA 0 0 0
346 TOTAL DEFERRED PROGRAMS 0 0 0
347
348 DEVELOPMENT OF IERCO RATE BASE
349 INVESTMENT IN IERCO E10 0 0 0
350 PREPAID COAL ROYALTIES E10 0 0 0
351 NOTES PAYABLE TO/RECEIVABLE FROM SUBSIDIARY E10 0 0 0
352 TOTAL SUBSIDIARY RATE BASE 0 0 0
353
354 TOTAL COMBINED RATE BASE 763,200,310 730,792,519 32,407,792
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 9 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
355 TABLE 4-OPERATING REVENUES
356 FIRM ENERGY SALES
357 440-448/RETAIL RETREV 5,497,548 5,497,548 0
358 442/BASE REVENUE TRANSFER-PCA CIDA 0 0 0
359 442/BASE REVENUE TRANSFER-EE RIDER CIDA 0 0 0
360 447/FIRM SALES FOR RESALE E10 0 0 0
361 447/SYSTEM OPPORTUNITY SALES E10 0 0 0
362 447.050/FINANCIAL LOSSES E10 0 0 0
363 TOTAL SALES OF ELECTRICITY 5,497,548 5,497,548 0
364
365 OTHER OPERATING REVENUES
366 415/MERCHANDISING REVENUES D60 0 0 0
367
368 449/OATT TARIFF REFUND
369 NETWORK D11 0 0 0
370 POINT-TO-POINT D11 0 0 0
371 TOTAL ACCOUNT 449 0 0 0
372
373 451/MISCELLANEOUS SERVICE REVENUES DA451 0 0 0
374
375 454/RENTS FROM ELECTRIC PROPERTY
376 SUBSTATION EQUIPMENT L 139 0 0 0
377 TRANSFORMER RENTALS D11 0 0 0
378 LINE RENTALS D11 0 0 0
379 COGENERATION L 498 0 0 0
380 REAL ESTATE RENTS L 200 0 0 0
381 DARK FIBER PROJECT CIDA 0 0 0
382 POLE ATTACHMENTS L 176 0 0 0
383 FACILITIES CHARGES DA454 0 0 0
384 OTHER RENTALS L122 0 0 0
385 MISCELLANEOUS PTD 0 0 0
386 TOTAL ACCO U NT 454 0 0 0
387
388 456/OTHER ELECTRIC REVENUES
389 TRANSMISSION NETWORK SERVICES-FIRM DA D11 0 0 0
390 TRANSMISSION NETWORK SERVICES-DIST FACILITIES D60 0 0 0
391 TRANSMISSION POINT-TO-POINT D11 0 0 0
392 PHOTOVOLTAIC STATION SERVICE L 186+CIAC 0 0 0
393 ENERGY EFFICIENCY RIDER CIDA 0 0 0
394 STAND-BY SERVICE DASTNBY 0 0 0
395 SIERRA PACIFIC USAGE CHARGE E10 0 0 0
396 ANTELOPE L 518 0 0 0
397 MISCELLANEOUS PTD 0 0 0
398 TOTAL ACCOUNT 456 0 0 0
399
400 TOTAL OTHER OPERATING REVENUES 0 0 0
401
402 TOTAL OPERATING REVENUES 5,497,548 5,497,548 0
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 10 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
403 TABLE 5-OPERATION&MAINTENANCE EXPENSES
404 STEAM POWER GENERATION
405 OPERATION
406 500/SUPERVISION&ENGINEERING D10 3,713 3,561 151
407 501/FUEL E10 0 0 0
408 502/STEAM EXPENSES
409 LABOR D10 0 0 0
410 OTHER E10 0 0 0
411 TOTAL ACCOUNT502 0 0 0
412 505/ELECTRIC EXPENSES
413 LABOR D10 0 0 0
414 OTHER E10 0 0 0
415 TOTAL ACCOUNT 505 0 0 0
416 506/MISCELLANEOUS EXPENSES D10 (139) (134) (6)
417 507/RENTS L 121 0 0 0
418 STEAM OPERATION EXPENSES 3,573 3,428 146
419
420 MAINTENANCE
421 510/SUPERVISION&ENGINEERING D10 0 0 0
422 511 /STRUCTURES D10 0 0 0
423 512/BOILER PLANT
424 LABOR D10 0 0 0
425 OTHER E10 0 0 0
426 TOTAL ACCOUNT 512 0 0 0
427 513/ELECTRIC PLANT
428 LABOR D10 0 0 0
429 OTHER E10 0 0 0
430 TOTAL ACCOUNT 513 0 0 0
431 514/MISCELLANEOUS STEAM PLANT D10 0 0 0
432 STEAM MAINTENANCE EXPENSES 0 0 0
433 TOTAL STEAM GENERATION EXPENSES 3,573 3,428 146
434
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 11 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
435 TABLE 5-OPERATION&MAINTENANCE EXPENSES
436 HYDRAULIC POWER GENERATION
437 OPERATION
438 535/SUPERVISION&ENGINEERING L 895 114,935 110,217 4,718
439 536/WATER FOR POWER
440 WATER FOR POWER/WCLOUD SEEDING D10 (1,885) (1,808) (77)
441 WATER LEASE D10 0 0 0
442 53(TOTAL ACCOUNT 536 (1,885) (1,808) (77)
443 537/HYDRAULIC EXPENSES D10 477,683 458,196 19,486
444 538/ELECTRIC EXPENSES
445 LABOR D10 242,198 232,317 9,880
446 OTHER E10 0 0 0
447 TOTAL ACCOUNT 538 242,198 232,317 9,880
448 539/MISCELLANEOUS EXPENSES D10 489,559 469,588 19,971
449 540/RENTS D10 0 0 0
450 HYDRAULIC OPERATION EXPENSES 1,322,489 1,268,510 53,978
451
452 MAINTENANCE
453 541/SUPERVISION&ENGINEERING L 906 99,040 95,000 4,040
454 542/STRUCTURES D10 5,823 5,586 238
455 543/RESERVOIRS,DAMS&WATERWAYS D10 85,844 82,342 3,502
456 544/ELECTRIC PLANT
457 LABOR D10 (13,715) (13,155) (559)
458 OTHER E10 0 0 0
459 TOTAL ACCOUNT 544 (13,715) (13,155) (559)
460 545/MISCELLANEOUS HYDRAULIC PLANT L 122 171,556 164,558 6,998
461 HYDRAULIC MAINTENANCE EXPENSES 348,549 334,330 14,219
462 TOTAL HYDRAULIC GENERATION EXPENSES 1,671,038 1,602,841 68,197
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 12 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
463 TABLE 5-OPERATION&MAINTENANCE EXPENSES
464 OTHER POWER GENERATION
465 OPERATION
466 546/SUPERVISION&ENGINEERING L 919 99,353 95,300 4,053
467 547/FUEL
468 DIESEL FUEL E10 0 0 0
469 OTHER E10 0 0 0
470 BRIDGER-GAS OPERATIONS E10 0 0 0
471 TOTAL ACCOUNT 547 0 0 0
472 548/GENERATING EXPENSES
473 LABOR D10 441,033 423,042 17,991
474 OTHER E10 0 0 0
475 TOTAL ACCOUNT 548 441,033 423,042 17,991
476 549/MISCELLANEOUS EXPENSES D10 171,671 164,668 7,003
477 550/RENTS D10 0 0 0
478 OTHER POWER OPER EXPENSES 712,057 683,010 29,047
479
480 MAINTENANCE
481 551/SUPERVISION&ENGINEERING L 929 0 0 0
482 552/STRUCTURES D10 4,070 3,904 166
483 553/GENERATING&ELECTRIC PLANT
484 LABOR D10 5,162 4,951 211
485 OTHER E10 0 0 0
486 TOTAL ACCOUNT 553 5,162 4,951 211
487 554/MISCELLANEOUS EXPENSES L 124 59,691 57,256 2,435
488 OTHER POWER MAINT EXPENSES 68,923 66,111 2,812
489 TOTAL OTHER POWER GENERATION EXP 780,980 749,121 31,859
490
491 OTHER POWER SUPPLY EXPENSE
492 555.0/PURCHASED POWER
493 POWER EXPENSE E10 0 0 0
494 OTHER CIDA 0 0 0
495 TRANSMISSION LOSSES E10 0 0 0
496 DEMAND RESPONSE INCENTIVE CIDA 0 0 0
497 TOTAL 555.0/PURCHASED POWER 0 0 0
498 555.1/COGENERATION&SMALL POWER PROD E10 0 0 0
499 555/TOTAL 0 0 0
500 556/LOAD CONTROL&DISPATCHING EXPENSES D10 0 0 0
501 557/OTHER EXPENSES
502 PCA/EPC ACCOUNTS CIDA 0 0 0
503 OREGON POWER COST-RELATED EXPENSES CODA 0 0 0
504 OTHER D10 589,891 565,827 24,064
505 557/TOTAL 589,891 565,827 24,064
506 TOTAL OTHER POWER SUPPLY EXPENSES 589,891 565,827 24,064
507
508 TOTAL PRODUCTION EXPENSES 3,045,482 2,921,217 124,266
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 13 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
509 TABLE 5-OPERATION&MAINTENANCE EXPENSES
510 TRANSMISSION EXPENSES
511 OPERATION
512 560/SUPERVISION&ENGINEERING L 157 2,879 2,762 117
513 561/LOAD DISPATCHING D12 539,717 517,700 22,017
514 562/STATION EXPENSES L 139 59,838 57,397 2,441
515 563/OVERHEAD LINE EXPENSES L 143+147+151 98,225 94,218 4,007
516 565/TRANSMISSION OF ELECTRICITY BY OTHERS E10 0 0 0
517 566/MISCELLANEOUS EXPENSES L157 0 0 0
518 567/RENTS L 157 0 0 0
519 TOTAL TRANSMISSION OPERATION 700,660 672,077 28,582
520
521 MAINTENANCE
522 568/SUPERVISION&ENGINEERING L 157 64,239 61,619 2,621
523 569/STRUCTURES L 135 38,010 36,459 1,551
524 570/STATION EQUIPMENT L 139 450,722 432,335 18,387
525 571/OVERHEAD LINES L 143+147+151 267,008 256,116 10,892
526 573/MISCELLANEOUS PLANT L 157 (2,922) (2,803) (119)
527 TOTAL TRANSMISSION MAINTENANCE 817,057 783,726 33,331
528
529 TOTAL TRANSMISSION EXPENSES 1,517,716 1,455,803 61,913
530
531 REGIONAL MARKET EXPENSES
532 OPERATION
533 575/OPER TRANS MKT ADMIN-EIM L 157 0 0 0
534
535 TOTAL REGIONAL MARKET EXPENSES 0 0 0
536
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 14 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
537 TABLE 5-OPERATION&MAINTENANCE EXPENSES
538 DISTRIBUTION EXPENSES
539 OPERATION
540 580/SUPERVISION&ENGINEERING L 186 401,388 384,027 17,361
541 581/LOAD DISPATCHING D60 863,231 830,537 32,694
542 582/STATION EXPENSES L 171 98,208 94,072 4,136
543 583/OVERHEAD LINE EXPENSES L 176+177 207,838 192,689 15,149
544 584/UNDERGROUND LINE EXPENSES L 178+179 360,490 355,099 5,391
545 585/STREET LIGHTING&SIGNAL SYSTEMS L 184 (22,299) (21,409) (890)
546 586/METER EXPENSES L 182 861,859 834,019 27,840
547 587/CUSTOMER INSTALLATIONS EXPENSE L 183 165,988 154,536 11,452
548 588/MISCELLANEOUS EXPENSES L 186 198,869 190,268 8,602
549 589/RENTS L 186 0 0 0
550 TOTAL DISTRIBUTION OPERATION 3,135,573 3,013,839 121,734
551
552 MAINTENANCE
553 590/SUPERVISION&ENGINEERING L 186 (1,662) (1,590) (72)
554 591/STRUCTURES L167 0 0 0
555 592/STATION EQUIPMENT L 171 832,801 797,724 35,077
556 593/OVERHEAD LINES L 176+177 496,969 460,746 36,223
557 594/UNDERGROUND LINES L 178+179 15,029 14,805 225
558 595/LINE TRANSFORMERS L 180 381 360 21
559 596/STREET LIGHTING&SIGNAL SYSTEMS L 184 (32,851) (31,540) (1,312)
560 597/METERS L 182 140,121 135,595 4,526
561 598/MISCELLANEOUS PLANT L 186 33,559 32,107 1,451
562 TOTAL DISTRIBUTION MAINTENANCE 1,484,347 1,408,207 76,140
563 TOTAL DISTRIBUTION EXPENSES 4,619,920 4,422,046 197,874
564
565 CUSTOMER ACCOUNTING EXPENSES
566 901/SUPERVISION L 999 115,100 109,361 5,739
567 902/METER READING CW902 27,007 23,392 3,615
568 903/CUSTOMER RECORDS&COLLECTIONS CW903 1,170,506 1,132,078 38,428
569 904/UNCOLLECTIBLE ACCOUNTS CW904 0 0 0
570 905/MISC EXPENSES L 567+568+569 0 0 0
571 TOTAL CUSTOMER ACCOUNTING EXPENSES 1,312,613 1,264,831 47,781
572
573 CUSTOMER SERVICES&INFORMATION EXPENSES
574 907/SUPERVISION L 1007 28,463 27,724 739
575 908/CUSTOMER ASSISTANCE
576 SYSTEM CONSERVATION E10 0 0 0
577 OTHER CUSTOMER ASSISTANCE DA908 1,272,558 1,239,537 33,021
578 TOTAL ACCOUNT908 1,272,558 1,239,537 33,021
579 909/INFORMATION&INSTRUCTIONAL DA909 0 0 0
580 910/MISCELLANEOUS EXPENSES L 578+579 97,408 94,880 2,528
581 912/DEMO AND SELLING EXPENSES E10 0 0 0
582 TOTAL CUST SERV&INFORMATN EXPENSES 1,398,429 1,362,142 36,287
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 15 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
583 TABLE 5-OPERATION&MAINTENANCE EXPENSES
584 ADMINISTRATIVE&GENERAL EXPENSES
585 920/ADMINISTRATIVE&GENERAL SALARIES LABOR 8,028,691 7,682,492 346,198
586 921/OFFICE SUPPLIES LABOR 230,392 220,458 9,935
587 922/ADMIN&GENERAL EXPENSES TRANSFERRED-CR LABOR (9,339,367) (8,936,652) (402,715)
588 923/OUTSIDE SERVICES LABOR 0 0 0
589 924/PROPERTY INSURANCE
590 PRODUCTION-STEAM D10 0 0 0
591 ALL RISK&MISCELLANEOUS P110P 66,654 63,882 2,772
592 TOTAL ACCOUNT 924 66,654 63,882 2,772
593 925/INJURIES&DAMAGES LABOR 18,752 17,943 809
594 926/EMPLOYEE PENSIONS&BENEFITS LABOR 8,410,933 8,048,252 362,681
595 EMPLOYEE PENSIONS&BENEFITS-OREGON CODA 0 0 0
596 EMPLOYEE PENSIONS&BENEFITS-IDAHO CIDA 0 0 0
597 EMPLOYEE PENSIONS&BENEFITS-CAPITALIZED OREGON CODA 0 0 0
598 927/FRANCHISE REQUIREMENTS CIDA 0 0 0
599 928/REGULATORY COMMISSION EXPENSES
600 928.101/FERC ADMIN ASSESS&SECURITIES
601 CAPACITY RELATED D10 0 0 0
602 ENERGY RELATED E10 0 0 0
603 FERC RATE CASE E99 0 0 0
604 FERC ORDER 472 D11 0 0 0
605 FERC OTHER D11 0 0 0
606 FERC-OREGON HYDRO FEE D11 0 0 0
607 SEC EXPENSES CIDA 0 0 0
608 IDAHO PUC -RATE CASE CIDA 0 0 0
609 -OTHER CIDA 0 0 0
610 OREGON PUC-RATE CASE CODA 0 0 0
611 -OTHER CODA 0 0 0
612 TOTAL ACCOUNT 928 0 0 0
613 929/DUPLICATE CHARGES LABOR 0 0 0
614 930.1/GENERAL ADVERTISING LABOR 0 0 0
615 930.2/MISCELLANEOUS EXPENSES LABOR (12,177) (11,652) (525)
616 931/RENTS L 200 0 0 0
617 TOTAL ADM&GEN OPERATION 7,403,878 7,084,724 319,154
618 PLUS:
619 935/GENERAL PLANT MAINTENANCE L 200 259,496 248,504 10,992
620 416/MERCHANDISING EXPENSE D60 0 0 0
621 TOTAL OPER&MAINT EXPENSES 19,557,535 18,759,267 798,267
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 16 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
622 TABLE 6-DEPRECIATION&AMORTIZATION EXPENSE
623
624 DEPRECIATION EXPENSE
625 310-316/STEAM PRODUCTION L 121 897,709 861,089 36,621
626 330-336/HYDRAULIC PRODUCTION L 122 2,671,493 2,562,513 108,980
627 340-346/OTHER PRODUCTION-BASELOAD L 123 190,196 182,437 7,759
628 340-346/OTHER PRODUCTION-PEAKERS L 124 80,887 77,588 3,300
629 TOTAL PRODUCTION PLANT 3,840,286 3,683,626 156,659
630
631 TRANSMISSION PLANT
632 350/LAND&LAND RIGHTS L 131 60,621 58,148 2,473
633 352/STRUCTURES&IMPROVEMENTS L 135 155,594 149,246 6,347
634 353/STATION EQUIPMENT L 139 772,586 741,069 31,517
635 354/TOWERS&FIXTURES L 143 160,021 153,493 6,528
636 355/POLES&FIXTURES L 147 797,742 765,199 32,543
637 356/OVERHEAD CONDUCTORS&DEVICES L 151 267,279 256,376 10,903
638 359/ROADS&TRAILS L 155 102 98 4
639 TOTAL TRANSMISSION PLANT 2,213,945 2,123,630 90,315
640
641 DISTRIBUTION PLANT
642 360/LAND&LAND RIGHTS L 163 (1,838) (1,775) (63)
643 361/STRUCTURES&IMPROVEMENTS L 167 188,344 179,443 8,901
644 362/STATION EQUIPMENT L 171 281,157 269,315 11,842
645 363/STORAGE BATTERY EQUIPMENT L 173 9,627,639 9,234,892 392,747
646 364/POLES,TOWERS&FIXTURES L 176 516,031 475,738 40,293
647 365/OVERHEAD CONDUCTORS&DEVICES L 177 187,020 176,337 10,683
648 366/UNDERGROUND CONDUIT L 178 127,898 125,894 2,003
649 367/UNDERGROUND CONDUCTORS&DEVICES L 179 811,051 799,005 12,047
650 368/LINE TRANSFORMERS L 180 1,180,703 1,115,557 65,146
651 369/SERVICES L 181 63,601 61,112 2,489
652 370/METERS L 182 311,142 301,091 10,050
653 371/INSTALLATIONS ON CUSTOMER PREMISES L 183 51,182 47,651 3,531
654 373/STREET LIGHTING SYSTEMS L 184 19,480 18,702 778
655 TOTAL DISTRIBUTION PLANT 13,363,409 12,802,962 560,446
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 17 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
656 TABLE 6-DEPRECIATION&AMORTIZATION EXPENSE
657
658 GENERALPLANT
659 389/LAND&LAND RIGHTS L 189 0 0 0
660 390/STRUCTURES&IMPROVEMENTS L 190 535,348 512,671 22,677
661 391/OFFICE FURNITURE&EQUIPMENT L 191 636,073 609,129 26,944
662 392/TRANSPORTATION EQUIPMENT L 192 (66,407) (63,594) (2,813)
663 393/STORES EQUIPMENT L 193 129,334 123,855 5,479
664 394/TOOLS,SHOP&GARAGE EQUIPMENT L 194 51,369 49,193 2,176
665 395/LABORATORY EQUIPMENT L 195 85,142 81,535 3,607
666 396/POWER OPERATED EQUIPMENT L 196 0 0 0
667 397/COMMUNICATIONS EQUIPMENT L 197 328,077 314,179 13,897
668 398/MISCELLANEOUS EQUIPMENT L 198 (28,300) (27,101) (1,199)
669 TOTAL GENERAL PLANT 1,670,634 1,599,866 70,768
670
671 TOTAL DEPRECIATION EXPENSE 21,088,273 20,210,085 878,189
672
673 DEPRECIATION ON DISALLOWED COSTS L 118 0 0 0
674 TOTAL DEPRECIATION EXPENSE 21,088,273 20,210,085 878,189
675
676 AMORTIZATION EXPENSE
677 302/FRANCHISES AND CONSENTS L 115 306,290 293,795 12,495
678 303/MISCELLANEOUS INTANGIBLE PLANT L 116 1,959,025 1,876,041 82,984
679 ADJUSTMENTS,GAINS&LOSSES L 118 0 0 0
680 TOTAL AMORTIZATION EXPENSE 2,265,315 2,169,836 95,479
681
682 TOTAL DEPRECIATION&AMORTIZATION EXP 23,353,588 22,379,921 973,667
683
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 18 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
684 TABLE 7-TAXES OTHER THAN INCOME TAXES
685
686 TAXES OTHER THAN INCOME
687 FEDERALTAXES
688 FICA LABOR 0 0 0
689 FUTA LABOR 0 0 0
690 LESS PAYROLL DEDUCTION LABOR 0 0 0
691
692 STATE TAXES
693 AD VALOREM TAXES
694 JIM BRIDGER STATION L 121 0 0 0
695 VALMY L 121 0 0 0
696 OTHER-PRODUCTION PLANT L 126 0 0 0
697 OTHER-TRANSMISSION PLANT L 157 0 0 0
698 OTHER-DISTRIBUTION PLANT L 186 0 0 0
699 OTHER-GENERAL PLANT L200 0 0 0
700 SUB-TOTAL 0 0 0
701
702 LICENSES-HYDRO PROJECTS L 122 0 0 0
703
704 REGULATORY COMMISSION FEES
705 STATE OF IDAHO CIDA 0 0 0
706 STATE OF OREGON CODA 0 0 0
707
708 FRANCHISE TAXES
709 STATE OF OREGON CODA 0 0 0
710
711 OTHER STATE TAXES
712 UNEMPLOYMENTTAXES LABOR 0 0 0
713 HYDRO GENERATION KWH TAX E10 0 0 0
714 IRRIGATION-PIC E10 0 0 0
715
716 TOTAL TAXES OTHER THAN INCOME 0 0 0
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 19 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
717 TABLE 8-REGULATORY DEBITS&CREDITS
718 REGULATORY DEBITS/CREDITS
719 STATE OF IDAHO CIDA 0 0 0
720 STATE OF OREGON CODA 0 0 0
721
722 TOTAL REGULATORY DEBITS/CREDITS 0 0 0
723
724
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 20 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
725 TABLE 9-INCOME TAXES
726
727 410/411 NET PROVISION FOR DEFERRED INCOME TAXES
728 ACCOUNT#282-RELATED P101 P 3,173,455 3,039,028 134,427
729 ACCOUNTS#190&#283-RELATED L 756 0 0 0
730 TOTAL NET PROVISION FOR DEFERRED INCOME TAXES 3,173,455 3,039,028 134,427
731
732 411.4-INVESTMENT TAX CREDIT ADJUSTMENT P101 P 73,978,000 70,844,300 3,133,700
733
734 SUMMARY OF INCOME TAXES
735
736 TOTAL FEDERAL INCOME TAX (82,058,780) (78,545,328) (3,513,452)
737
738 STATE INCOME TAX
739 STATE OF IDAHO (10,357,367) (9,908,006) (449,361)
740 STATE OF OREGON (233,216) (222,768) (10,448)
741 OTHER STATES (77,739) (74,256) (3,483)
742 TOTAL STATE INCOME TAXES (10,668,322) (10,205,030) (463,292)
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 21 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
743 TABLE 10-CALCULATION OF FEDERAL INCOME TAX
744 OPERATING REVENUES 5,497,548 5,497,548 0
745
746 OPERATING EXPENSES
747 OPERATION&MAINTENANCE 19,557,535 18,759,267 798,267
748 DEPRECIATION EXPENSE 21,088,273 20,210,085 878,189
749 AMORTIZATION OF LIMITED TERM PLANT 2,265,315 2,169,836 95,479
750 TAXES OTHER THAN INCOME 0 0 0
751 REGULATORY DEBITS/CREDITS 0 0 0
752 TOTAL OPERATING EXPENSES 42,911,123 41,139,188 1,771,935
753
754 BOOK-TAX ADJUSTMENT L 752 0 0 0
755
756 INCOME BEFORE TAX ADJUSTMENTS(NOI Before Interest) (37,413,575) (35,641,640) (1,771,935)
757
758 INCOME STATEMENT ADJUSTMENTS
759 INTEREST EXPENSE SYNCHRONIZATION L 354 25,426,280 24,346,604 1,079,677
760
761 NET OPERATING INCOME BEFORE TAXES (62,839,855) (59,988,244) (2,851,611)
762
763 TOTAL STATE INCOME TAXES(ALLOWED) (10,668,322) (10,205,030) (463,292)
764
765 NET FEDERAL INCOME AFTER STATE INCOME TAXES (52,171,533) (49,783,214) (2,388,319)
766
767 FEDERAL TAX AT 21 PERCENT @ 21% (10,956,022) (10,454,475) (501,547)
768 OTHER CURRENT TAX ADJUSTMENTS L 767 0 0 0
769 PRIOR YEAR TAX ADJUSTMENT L 767 0 0 0
770
771 TOTAL FEDERAL INCOME TAX BEFORE OTHER ADJUSTMENTS (10,956,022) (10,454,475) (501,547)
772
773 OTHER TAX ADJUSTMENTS
774 ALLOWANCE FOR AFUDC P101 P 0 0 0
775 FEDERAL INCOME TAX ADJUSTMENTS-PLANT P101 P (14,898,848) (14,267,734) (631,114)
776 FEDERAL INCOME TAX ADJUSTMENTS-OTHER L 756 0 0 0
777 SUM OF OTHER ADJUSTMENTS (14,898,848) (14,267,734) (631,114)
778 FEDERAL TAX ON OTHER TAX ADJ AT 21 PERCENT @ 21% (3,128,758) (2,996,224) (132,534)
779 FEDERAL GENERAL BUSINESS CREDITS P101 P 67,974,000 65,094,629 2,879,371
780
781 TOTAL FEDERAL INCOME TAX (82,058,780) (78,545,328) (3,513,452)
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 22 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
782 TABLE 11-OREGON STATE INCOME TAX
783
784 NET OPERATING INCOME BEFORE TAXES-OREGON L 761 (62,839,855) (59,988,244) (2,851,611)
785
786 ALLOWANCE FOR AFUDC P101 P 0 0 0
787 STATE INCOME TAX ADJUSTMENTS-PLANT P101 P (14,898,848) (14,267,734) (631,114)
788 STATE INCOME TAX ADJUSTMENTS-OTHER L 756 0 0 0
789 ADD: OTHER L 756 0 0 0
790
791 TOTAL STATE INCOME TAX ADJUSTMENTS-OREGON (14,898,848) (14,267,734) (631,114)
792
793 INCOME SUBJECT TO OREGON TAX (77,738,703) (74,255,978) (3,482,725)
794
795 IERCO TAXABLE INCOME E10 0 0 0
796 BONUS DEPRECIATION&OTHER OREGON ADJ P101 P 0 0 0
797 OTHER L 756 0 0 0
798
799 TOTAL STATE TAXABLE INCOME-OREGON (77,738,703) (74,255,978) (3,482,725)
800 APPORTIONMENT FACTOR(0.045454550) @ 0.045454550 (3,533,578) (3,375,272) (158,306)
801 POST APPORTIONMENT M ITEMS L 756 0 0 0
802 TOTAL TAXABLE INCOME-OREGON (3,533,578) (3,375,272) (158,306)
803
804 OREGON TAX AT6.6 PERCENT @ 6.60% (233,216) (222,768) (10,448)
805 LESS:INVESTMENT TAX CREDIT P101 P 0 0 0
806
807 STATE INCOME TAX ALLOWED-OREGON (233,216) (222,768) (10,448)
808 ADD: OR CAT TAX L 785 0 0 0
809 PRIOR YEARS'TAX ADJUSTMENT L 785 0 0 0
810
811 STATE INCOME TAX PAID-OREGON (233,216) (222,768) (10,448)
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 23 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
812 TABLE 12-IDAHO STATE INCOME TAX
813
814 NET OPERATING INCOME BEFORE TAXES-IDAHO L 744 (62,839,855) (59,988,244) (2,851,611)
815
816 ALLOWANCE FOR AFUDC P101 P 0 0 0
817 STATE INCOME TAX ADJUSTMENTS-PLANT P101 P (14,898,848) (14,267,734) (631,114)
818 STATE INCOME TAX ADJUSTMENTS-OTHER L 756 0 0 0
819
820 INCOME SUBJECT TO IDAHO TAX (77,738,703) (74,255,978) (3,482,725)
821
822 IERCO TAXABLE INCOME E10 0 0 0
823 BONUS DEPRECIATION ADJUSTMENT P101 P 0 0 0
824 OTHER L 756 0 0 0
825 TOTAL STATE TAXABLE INCOME-IDAHO (77,738,703) (74,255,978) (3,482,725)
826 APPORTIONMENT FACTOR(.965517241) @ 0.965517241 (75,058,058) (71,695,427) (3,362,631)
827 POST APPORTIONMENT SCHEDULE M L 756 0 0 0
828 TOTAL TAXABLE INCOME-IDAHO (75,058,058) (71,695,427) (3,362,631)
829 IDAHO TAX AT 5.8 PERCENT @ 5.80% (4,353,367) (4,158,335) (195,033)
830 LESS:INVESTMENT TAX CREDIT P101 P 6,004,000 5,749,671 254,329
831
832 STATE INCOME TAX ALLOWED-IDAHO (10,357,367) (9,908,006) (449,361)
833 ADD: CURRENT TAX ADJUSTMENT L 829 0 0 0
834 PRIOR YEARS'TAX ADJUSTMENT 829 0 0 0
835 STATE INCOME TAX PAID-IDAHO (10,357,367) (9,908,006) (449,361)
836
837 OTHER STATE INCOME TAX
838 INCOME SUBJECT TO TAX (77,738,703) (74,255,978) (3,482,725)
839
840 IERCO TAXABLE INCOME E10 0 0 0
841 BONUS DEPRECIATION ADJUSTMENT P101 P 0 0 0
842 OTHER L 756 0 0 0
843 TOTAL TAXABLE INCOME-OTHER STATES (77,738,703) (74,255,978) (3,482,725)
844 APPORTIONMENT FACTOR(1.0) (77,738,703) (74,255,978) (3,482,725)
845 POST APPORTIONMENT SCHEDULE M L 759 0 0 0
846 TAXABLE INCOME (77,738,703) (74,255,978) (3,482,725)
847 OTHER TAX AT 0.1 PERCENT @ 0.10% (77,739) (74,256) (3,483)
848 ADD:CURRENT YEAR'S TAX DEFICIENCY L 832 0 0 0
849 PRIOR YEARS'TAX ADJUSTMENT L 832 0 0 0
850 OTHER STATES'INCOME TAX PAID (77,739) (74,256) (3,483)
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 24 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
851 TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
852 STEAM POWER GENERATION
853 OPERATION
854 500/SUPERVISION&ENGINEERING L 855-865 266,133 255,277 10,857
855 501/FUEL D10 2,559,614 2,455,198 104,416
856 502/STEAM EXPENSES
857 LABOR D10 1,607,750 1,542,164 65,586
858 OTHER D10 0 0 0
859 TOTAL ACCOUNT 502 1,607,750 1,542,164 65,586
860 505/ELECTRIC EXPENSES
861 LABOR D10 626,112 600,571 25,541
862 OTHER D10 0 0 0
863 TOTAL ACCOUNT 505 626,112 600,571 25,541
864 506/MISCELLANEOUS EXPENSES D10 3,352,418 3,215,661 136,757
865 507/RENTS D10 0 0 0
866 STEAM OPERATION EXPENSES 8,412,027 8,068,870 343,158
867
868 MAINTENANCE
869 510/SUPERVISION&ENGINEERING L 870-879 0 0 0
870 511 /STRUCTURES D10 658 631 27
871 512/BOILER PLANT
872 LABOR D10 3,983,710 3,821,200 162,510
873 OTHER D10 0 0 0
874 TOTAL ACCOUNT 512 3,983,710 3,821,200 162,510
875 513/ELECTRIC PLANT
876 LABOR D10 1,522,637 1,460,523 62,114
877 OTHER D10 0 0 0
878 TOTAL ACCOUNT 513 1,522,637 1,460,523 62,114
879 514/MISCELLANEOUS STEAM PLANT D10 2,441,874 2,342,261 99,613
880 STEAM MAINTENANCE EXPENSES 7,948,879 7,624,615 324,264
881 TOTAL STEAM GENERATION EXPENSES 16,360,906 15,693,485 667,422
882
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 25 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
883 TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
884 HYDRAULIC POWER GENERATION
885 OPERATION
886 535/SUPERVISION&ENGINEERING L 887-894 4,235,258 4,061,414 173,844
887 536/WATER FOR POWER E10 866,414 828,021 38,393
888 537/HYDRAULIC EXPENSES D10 6,262,192 6,006,734 255,458
889 538/ELECTRIC EXPENSES
890 LABOR D10 1,510,454 1,448,837 61,617
891 OTHER D10 0 0 0
892 TOTAL ACCOUNT 538 1,510,454 1,448,837 61,617
893 539/MISCELLANEOUS EXPENSES D10 3,401,219 3,262,471 138,748
894 540/RENTS D10 0 0 0
895 HYDRAULIC OPERATION EXPENSES 16,275,537 15,607,477 668,060
896
897 MAINTENANCE
898 541/SUPERVISION&ENGINEERING L 899-905 90,192 86,513 3,679
899 542/STRUCTURES D10 577,669 554,103 23,565
900 543/RESERVOIRS,DAMS&WATERWAYS D10 254,872 244,475 10,397
901 544/ELECTRIC PLANT
902 LABOR D10 1,799,397 1,725,993 73,404
903 OTHER D10 0 0 0
904 TOTAL ACCOUNT 544 1,799,397 1,725,993 73,404
905 545/MISCELLANEOUS HYDRAULIC PLANT D10 2,163,612 2,075,350 88,262
906 HYDRAULIC MAINTENANCE EXPENSES 4,885,742 4,686,434 199,307
907 TOTAL HYDRAULIC GENERATION EXPENSES 21,161,279 20,293,911 867,367
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 26 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
908 TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
909 OTHER POWER GENERATION
910 OPERATION
911 546/SUPERVISION&ENGINEERING L 912-918 516,722 495,643 21,079
912 547/FUEL E10 0 0 0
913 548/GENERATING EXPENSES
914 LABOR D10 3,234,939 3,102,974 131,965
915 OTHER D10 0 0 0
916 TOTAL ACCOUNT 548 3,234,939 3,102,974 131,965
917 549/MISCELLANEOUS EXPENSES D10 370,607 355,488 15,118
918 550/RENTS D10 0 0 0
919 OTHER POWER OPER EXPENSES 4,122,267 3,954,105 168,162
920
921 MAINTENANCE
922 551/SUPERVISION&ENGINEERING L 923-928 0 0 0
923 552/STRUCTURES D10 43,046 41,290 1,756
924 553/GENERATING&ELECTRIC PLANT
925 LABOR D10 56,825 54,507 2,318
926 OTHER D10 0 0 0
927 TOTAL ACCOUNT 553 56,825 54,507 2,318
928 554/MISCELLANEOUS EXPENSES D10 690,424 662,259 28,165
929 OTHER POWER MAINT EXPENSES 790,295 758,056 32,239
930 TOTAL OTHER POWER GENERATION EXP 4,912,562 4,712,161 200,402
931
932 OTHER POWER SUPPLY EXPENSE
933 555.0/PURCHASED POWER E10 0 0 0
934 555.1/COGENERATION&SMALL POWER PROD
935 CAPACITY RELATED D10 0 0 0
936 ENERGY RELATED E10 0 0 0
937 TOTAL 555.1/CSPP 0 0
938 555/TOTAL 0 0
939 556/LOAD CONTROL&DISPATCHING EXPENSES D10 0 0 0
940 557/OTHER EXPENSES D10 4,495,330 4,311,949 183,381
941 TOTAL OTHER POWER SUPPLY EXPENSES 4,495,330 4,311,949 183,381
942
943 TOTAL PRODUCTION EXPENSES 46,930,078 45,011,506 1,918,572
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 27 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
944 TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
945 TRANSMISSION EXPENSES
946 OPERATION
947 560/SUPERVISION&ENGINEERING L 157 2,380,639 2,283,524 97,115
948 561/LOAD DISPATCHING D12 3,053,979 2,929,396 124,583
949 562/STATION EXPENSES L 139 1,883,621 1,806,781 76,840
950 563/OVERHEAD LINE EXPENSES L 143+147+151 428,401 410,925 17,476
951 565/TRANSMISSION OF ELECTRICITY BY OTHERS E10 0 0 0
952 566/MISCELLANEOUS EXPENSES L 529 0 0 0
953 567/RENTS L 157 0 0 0
954 TOTAL TRANSMISSION OPERATION 7,746,639 7,430,625 316,014
955
956 MAINTENANCE
957 568/SUPERVISION&ENGINEERING L 157 90,949 87,239 3,710
958 569/STRUCTURES L 135 1,442,019 1,383,194 58,825
959 570/STATION EQUIPMENT L 139 2,327,169 2,232,236 94,934
960 571/OVERHEAD LINES L 143+147+151 865,811 830,491 35,320
961 573/MISCELLANEOUS PLANT L 157 3,520 3,376 144
962 TOTAL TRANSMISSION MAINTENANCE 4,729,468 4,536,536 192,932
963
964 TOTAL TRANSMISSION EXPENSES 12,476,107 11,967,161 508,946
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 28 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
965 TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
966 DISTRIBUTION EXPENSES
967 OPERATION
968 580/SUPERVISION&ENGINEERING L 186 2,995,909 2,866,330 129,580
969 581/LOAD DISPATCHING D60 4,166,909 4,009,091 157,818
970 582/STATION EXPENSES L 171 983,432 942,010 41,422
971 583/OVERHEAD LINE EXPENSES L 176+177 3,611,849 3,348,590 263,259
972 584/UNDERGROUND LINE EXPENSES L 178+179 1,372,655 1,352,128 20,527
973 585/STREET LIGHTING&SIGNAL SYSTEMS L 184 20,365 19,552 813
974 586/METER EXPENSES L 182 4,176,379 4,041,475 134,904
975 587/CUSTOMER INSTALLATIONS EXPENSE L 183 736,676 685,851 50,825
976 588/MISCELLANEOUS EXPENSES L 563 2,911,186 2,786,499 124,688
977 589/RENTS L 186 0 0 0
978 TOTAL DISTRIBUTION OPERATION 20,975,360 20,051,526 923,834
979
980 MAINTENANCE
981 590/SUPERVISION&ENGINEERING L 186 9,353 8,948 405
982 591/STRUCTURES L167 0 0 0
983 592/STATION EQUIPMENT L 171 2,716,642 2,602,218 114,424
984 593/OVERHEAD LINES L 176+177 5,201,009 4,821,920 379,089
985 594/UNDERGROUND LINES L 178+179 304,799 300,241 4,558
986 595/LINE TRANSFORMERS L 180 25,793 24,370 1,423
987 596/STREET LIGHTING&SIGNAL SYSTEMS L 184 123,794 118,851 4,943
988 597/METERS L 182 678,112 656,208 21,904
989 598/MISCELLANEOUS PLANT L 186 79,964 76,506 3,459
990 TOTAL DISTRIBUTION MAINTENANCE 9,139,466 8,609,262 530,204
991 TOTAL DISTRIBUTION EXPENSES 30,114,827 28,660,788 1,454,039
992
993 CUSTOMER ACCOUNTING EXPENSES
994 901/SUPERVISION L 995 705,017 610,646 94,371
995 902/METER READING CW902 1,267,888 1,098,173 169,715
996 903/CUSTOMER RECORDS&COLLECTIONS CW903 9,731,713 9,412,221 319,492
997 904/UNCOLLECTIBLE ACCOUNTS CW904 0 0 0
998 905/MISC EXPENSES L 995-997 0 0 0
999 TOTAL CUSTOMER ACCOUNTING EXPENSES 11,704,618 11,121,040 583,577
1000
1001 CUSTOMER SERVICES&INFORMATION EXPENSES
1002 907/SUPERVISION L 1006 828,671 807,168 21,503
1003 908/CUSTOMER ASSISTANCE L 575 4,679,331 4,557,909 121,422
1004 908/ENERGY EFFICIENCY RIDER CIDA 0 0 0
1005 909/INFORMATION&INSTRUCTIONAL L 579 0 0 0
1006 910/MISCELLANEOUS EXPENSES L 1003+1005 308,799 300,787 8,013
1007 TOTAL CUST SERV&INFORMATN EXPENSES 5,816,801 5,665,863 150,938
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 29 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
1008 TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
1009 ADMINISTRATIVE&GENERAL EXPENSES
1010 920/ADMINISTRATIVE&GENERAL SALARIES PTDCAS 53,511,744 51,204,117 2,307,628
1011 921/OFFICE SUPPLIES PTDCAS 228,890 219,019 9,871
1012 922/ADMIN&GENERAL EXPENSES TRANSFERRED-CR SUBEX 0 0 0
1013 923/OUTSIDE SERVICES PTDCAS 0 0 0
1014 924/PROPERTY INSURANCE 0
1015 PRODUCTION-STEAM L 121 0 0 0
1016 ALL RISK&MISCELLANEOUS P110P 378,934 363,177 15,757
1017
1018 925/INJURIES&DAMAGES LABOR 132,355 126,648 5,707
1019 926/EMPLOYEE PENSIONS&BENEFITS LABOR 0 0 0
1020 927/FRANCHISE REQUIREMENTS CIDA 0 0 0
1021 928/REGULATORY COMMISSION EXPENSES
1022 928.101/FERC ADMIN ASSESS&SECURITIES
1023 CAPACITY RELATED D10 0 0 0
1024 ENERGY RELATED E10 0 0 0
1025 928.101 I FERC ORDER 472 E99 0 0 0
1026 928.101/FERC MISCELLANIOUS L RESREV 0 0 0
1027 928.102 FERC RATE CASE RESREV 0 0 0
1028 928.104/FERC OREGON HYDRO RESREV 0 0 0
1029 SEC EXPENSES L 202 0 0 0
1030 928.202/IDAHO PUC -RATE CASE CIDA 0 0 0
1031 928.203/IDAHO PUC-OTHER CIDA 0 0 0
1032 928.301/OREGON PUC-FILING FEES CODA 0 0 0
1033 928.302/OREGON PUC-RATE CASE CODA 0 0 0
1034 928.303/OREGON PUC-OTHER CODA 0 0 0
1035 IPC/PUC JSS TRUE-UP ADJ PTD 0 0 0
1036 TOTAL ACCOUNT 928 0 0
1037 929/DUPLICATE CHARGES SUBEX 0 0 0
1038 930.1/GENERAL ADVERTISING RELAB 0 0 0
1039 930.2/MISCELLANEOUS EXPENSES PTDCAS 214,755 205,494 9,261
1040 931/RENTS L 200 0 0 0
1041 TOTAL ADM&GEN OPERATION 54,466,679 52,118,455 2,348,224
1042 PLUS:
1043 935/GENERAL PLANT MAINTENANCE P3908 1,038,440 994,452 43,988
1044 416/MERCHANDISING EXPENSE E10 0 0 0
1045 TOTAL OPER&MAINT EXPENSES 162,547,550 155,539,266 7,008,284
1046 TOTAL LABOR-RATIO(%) 100.00% 95.69% 4.31%
1047
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 30 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
1048 TABLE 14-ALLOCATION FACTORS
1049
1050 CAPACITY RELATED KW
1051 PRODUCTION RELATED COINCIDENT PEAKS @ GEN LEVEL D10 2,585,316 2,479,852 105,465
1052 SYSTEM TRANSMISSION SERVICE @ GENERATION LEVEL D11 2,585,316 2,479,852 105,465
1053 RETAIL TRANSMISSION SERVICE @ GENERATION LEVEL D12 2,585,316 2,479,852 105,465
1054 DISTRIBUTION SERVICE @ GENERATION LEVEL D60 2,431,714 2,339,615 92,099
1055
1056 ENERGY RELATED MWH
1057 GENERATION LEVEL(PSP) E10 16,783,429 16,039,716 743,713
1058 CUSTOMER LEVEL E99 15,740,718 15,039,426 701,292
1059
1060 CUSTOMER RELATED FACTORS
1061 902-CUSTOMER WEIGHTED CW902 1,819,788 1,576,198 243,590
1062 903-CUSTOMER WEIGHTED CW903 15,041,849 14,548,026 493,823
1063 904-CUSTOMER WEIGHTED CW904 2,751,851 2,564,962 186,889
1064 909-DIRECT ASSIGN-AVG.NO.CUST. DA909 610,567 590,862 19,705
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 31 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
1065 TABLE 14-ALLOCATION FACTORS
1066
1067 DIRECT ASSIGNMENTS (red font denotes allocator comes from Plant 1
1068 252-CUSTOMER ADVANCES DA252 13,139,360 13,043,126 96,234
1069 350-LAND&LAND RIGHTS DA350 0 0 0
1070 352-STRUCTURES&IMPROVEMENTS DA352 658 0 658
1071 353-STATION EQUIPMENT DA353 111,594 75,100 36,494
1072 354-TOWERS&FIXTURES DA354 0 0 0
1073 355-POLES&FIXTURES DA355 33,842 0 33,842
1074 356-OVERHEAD CONDUCTORS&DEVICES DA356 26,495 1,189 25,306
1075 359-ROADS&TRAILS DA359 0 0 0
1076 360LAND&LAND RIGHTS ACCT360 7,818,143 7,549,162 268,981
1077 360LAND&LAND RIGHTS-CIAC ACCT360CIAC 430,656 430,355 301
1078 361-STRUCTURES&IMPROVEMENTS ACCT361 52,245,201 49,776,238 2,468,963
1079 361-STRUCTURES&IMPROVEMENTS-CIAC ACCT361CIAC 8,009,324 7,447,616 561,708
1080 362-STATION EQUIPMENT ACCT362 300,357,806 287,706,828 12,650,978
1081 362-STATION EQUIPMENT-CIAC ACCT362CIAC 38,463,951 34,892,876 3,571,075
1082 364-POLES,TOWERS&FIXTURES-NET DA364 313,204,206 288,748,305 24,455,901
1083 365-OVERHEAD CONDUCTORS&DEVICES-NET DA365 155,253,318 146,384,826 8,868,492
1084 366-UNDERGROUND CONDUIT-NET DA366 52,785,315 51,958,505 826,810
1085 367-UNDERGROUND CONDUCTORS&DEVICES-NET DA367 318,155,073 313,429,461 4,725,612
1086 368-LINE TRANSFORMERS DA368 704,959,938 666,063,582 38,896,356
1087 369-DIRECT ASSIGNMENT DA369 67,920,301 65,262,678 2,657,623
1088 370-METERS DA370 112,940,727 109,292,546 3,648,181
1089 371-INSTALLATIONS ON CUSTOMER PREMISES-NET DA371 4,931,439 4,591,211 340,228
1090 373-STREET LIGHTING SYSTEMS-NET DA373 5,706,749 5,478,881 227,868
1091 451-REVENUE-MISCELLANEOUS SERVICE DA451 4,936,204 4,890,357 45,847
1092 454-REVENUE-FACILITIES CHARGE DA454 10,470,031 10,041,240 428,792
1093 908-OTHER CUSTOMER ASSISTANCE DA908 6,971,635 6,790,730 180,904
1094 440-RETAIL SALES REVENUE RETREV 5,491,025 5,491,025 0
1095 447-WHOLESALE SALES REVENUE RESREV 0 0 0
1096 456-REVENUE-STANDBY SERVICE DASTNBY 1 1 0
1097 440-REVENUE OFFSET FOR PLANT ADDITIONS DAREV 1 1 0
1098 IDAHO C I DA 1 1 0
1099 OREGON CODA 1 0 1
1100 NET TO GROSS TAX MULTIPLIER DA990 1.347 1.347 1.347
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 32 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
1101 TABLE 14-ALLOCATION FACTORS
1102
1103 INTERNALLY DEVELOPED ALLOCATION FACTORS
1104 PLANT-PROD,TRANS&DIST PTD 756,246,797 724,212,263 32,034,534
1105 LAB-PROD,TRANS,DIST,CUST ACCT&CSIS PTDCAS 107,042,430 102,426,358 4,616,072
1106 PLANT-HYDRO,OTHER,TSUBS,DSUBS&GP P110P 271,935,533 260,627,596 11,307,937
1107 PLANT-GEN PLT(390,391,397&398) P3908 29,201,032 27,964,079 1,236,953
1108 PLANT-PROD,TRANS,DIST&GEN P101 P 822,387,553 787,551,303 34,836,249
1109 O&M-PROD,TRANS,DIST,CUSTACCT&CSIS SUBEX 11,894,161 11,426,039 468,121
1110 LAB-PROD,TRANS,DIST,CUST ACCT&CSIS RELAB 271,935,533 260,627,596 11,307,937
1111 LAB-ALL LABOR WITHOUT 925-6 "CIRC LABOR 161,161,999 154,212,672 6,949,328
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 33 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
1112 TABLE 15-ALLOCATION FACTORS-RATIOS
1113
1114 CAPACITY RELATED KW
1115 PRODUCTION RELATED COINCIDENT PEAKS @ GEN LEVEL D10 100.00% 95.92% 4.08%
1116 SYSTEM TRANSMISSION SERVICE @ GENERATION LEVEL D11 100.00% 95.92% 4.08%
1117 RETAIL TRANSMISSION SERVICE @ GENERATION LEVEL D12 100.00% 95.92% 4.08%
1118 DISTRIBUTION SERVICE @ GENERATION LEVEL D60 100.00% 96.21% 3.79%
1119
1120 ENERGY RELATED MWH
1121 GENERATION LEVEL(PSP) E10 100.00% 95.57% 4.43%
1122 CUSTOMER LEVEL E99 100.00% 95.54% 4.46%
1123
1124 CUSTOMER RELATED FACTORS
1125 369-DIRECT ASSIGNMENT DA369 100.00% 96.09% 3.91%
1126 370-METERS DA370 100.00% 96.77% 3.23%
1127 902-CUSTOMER WEIGHTED CW902 100.00% 86.61% 13.39%
1128 903-CUSTOMER WEIGHTED CW903 100.00% 96.72% 3.28%
1129 904-CUSTOMER WEIGHTED CW904 100.00% 93.21% 6.79%
1130 909-DIRECT ASSIGN-AVG.NO.CUST. DA909 100.00% 96.77% 3.23%
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 34 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
1131 TABLE 15-ALLOCATION FACTORS-RATIOS
1132
1133 DIRECT ASSIGNMENTS
1134 252-CUSTOMER ADVANCES DA252 100.00% 99.27% 0.73%
1135 350-LAND&LAND RIGHTS DA350 #DIV/O! #DIV/O! #DIV/0I
1136 352-STRUCTURES&IMPROVEMENTS DA352 100.00% 0.00% 100.00%
1137 353-STATION EQUIPMENT DA353 100.00% 67.30% 32.70%
1138 354-TOWERS&FIXTURES DA354 #DIV/O! #DIV/O! #DIV/O!
1139 355-POLES&FIXTURES DA355 100.00% 0.00% 100.00%
1140 356-OVERHEAD CONDUCTORS&DEVICES DA356 100.00% 4.49% 95.51%
1141 359-ROADS&TRAILS DA359 #DIV/O! #DIV/O! #DIV/0!
1142 360LAND&LAND RIGHTS-DA DA360 100.00% 96.56% 3.44%
1143 360LAND&LAND RIGHTS-CIAC DA360C 100.00% 99.93% 0.07%
1144 361-STRUCTURES&IMPROVEMENTS-DA DA361 100.00% 95.27% 4.73%
1145 361-STRUCTURES&IMPROVEMENTS-CIAC DA361C 100.00% 92.99% 7.01%
1146 362-STATION EQUIPMENT-DA DA362 100.00% 95.79% 4.21%
1147 362-STATION EQUIPMENT-CIAC DA362C 100.00% 90.72% 9.28%
1148 364-POLES,TOWERS&FIXTURES-NET DA364 100.00% 92.19% 7.81%
1149 365-OVERHEAD CONDUCTORS&DEVICES-NET DA365 100.00% 94.29% 5.71%
1150 366-UNDERGROUND CONDUIT-NET DA366 100.00% 98.43% 1.57%
1151 367-UNDERGROUND CONDUCTORS&DEVICES-NET DA367 100.00% 98.51% 1.49%
1152 368-LINE TRANSFORMERS DA368 100.00% 94.48% 5.52%
1153 371-INSTALLATIONS ON CUSTOMER PREMISES-NET DA371 100.00% 93.10% 6.90%
1154 373-STREET LIGHTING SYSTEMS-NET DA373 100.00% 96.01% 3.99%
1155 451-REVENUE-MISCELLANEOUS SERVICE DA451 100.00% 99.07% 0.93%
1156 454-REVENUE-FACILITIES CHARGE DA454 100.00% 95.90% 4.10%
1157 908-OTHER CUSTOMER ASSISTANCE DA908 100.00% 97.41% 2.59%
1158 440-RETAIL SALES REVENUE RETREV 100.00% 100.00% 0.00%
1159 447-WHOLESALE SALES REVENUE RESREV #DIV/O! #DIV/O! #DIV/0I
1160 456-REVENUE-STANDBY SERVICE DASTNBY 100.00% 100.00% 0.00%
1161 440-REVENUE OFFSET FOR PLANT ADDITIONS DAREV 100.00% 100.00% 0.00%
1162 IDAHO CIDA 100.00% 100.00% 0.00%
1163 OREGON CODA 100.00% 0.00% 100.00%
1164 NET TO GROSS TAX MULTIPLIER DA990 1.347 1.347 1.347
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 35 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
1165 TABLE 15-ALLOCATION FACTORS-RATIOS
1166
1167 INTERNALLY DEVELOPED ALLOCATION FACTORS
1168 PLANT-PROD,TRANS&DIST PTD 100.00% 95.76% 4.24%
1169 LAB-PROD,TRANS,DIST,CUST ACCT&CSIS PTDCAS 100.00% 95.69% 4.31%
1170 PLANT-HYDRO,OTHER,TSUBS,DSUBS&GP P110P 100.00% 95.84% 4.16%
1171 PLANT-GEN PLT(390,391,397&398) P3908 100.00% 95.76% 4.24%
1172 PLANT-PROD,TRANS,DIST&GEN P101 P 100.00% 95.76% 4.24%
1173 O&M-PROD,TRANS,DIST,CUST ACCT&CSIS SUBEX 100.00% 96.06% 3.94%
1174 LAB-PROD,TRANS,DIST,CUST ACCT&CSIS RELAB 100.00% 95.84% 4.16%
1175 LAB-ALL LABOR WITHOUT 925-6 "CIRC" LABOR 100.00% 95.69% 4.31%
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 36 of 36

Gust, Stacy
From: Gust, Stacy
Sent: Monday,June 17, 2024 10:36 AM
To: Monica Barrios-Sanchez
Subject: FW: IPC-E-24-07 Larkin testimony
Attachments: Larkin DI Testimony.pdf
Hi Monica,
It looks like one of the pages on one of the exhibits to Matt Larkin's testimony was cut off. Could you please have the
attached replaced with the version that you have on your system?
Thank you.
Stacy Gust
Regulatory Administrative Assistant
Idaho Power I Regulatory Affairs
Office 208-388-5749
[e-mail]
From: Gust, Stacy
Sent: Monday,June 17, 2024 10:32 AM
To: Keri Hawker<[e-mail]>
Subject: RE: IPC-E-24-07 Larkin testimony
Hi Keri,
Yes,there is a page 2, please see the attached. It must have got cut off somehow. I will ask Monica if she will replace it.
Thank you.
Stacy Gust
Regulatory Administrative Assistant
Idaho Power I Regulatory Affairs
Office 208-388-5749
[e-mail]
From: Keri Hawker<[e-mail]>
Sent: Monday,June 17, 2024 10:23 AM
To: Gust, Stacy<[e-mail]>
Subject: [EXTERNAL] IPC-E-24-07 Larkin testimony

KEEP IDAHO POWER SECURE! External emails may request information or contain malicious links or attachments.Verify the
sender before proceeding, and check for additional warning messages below.
Stacy, good morning.
We were looking at case IPC-E-24-07, specifically the Larkin DI Testimony - Exhibit No 7, and
noticed that it is page 1 of 2, but we do not see a page 2.
Is there a page 2?
Thank you,
Keri Hawker Legal Administrative Assistant
Idaho Public Utilities Commission
11331 W. Chinden Blvd., Building 8, Suite 201-A
P.O. Box 83720
Boise, Idaho 83720-0074
Direct: [phone] 1 Fax: [phone]
[e-mail]
CONFIDENTIALITY NOTICE: This e-mail may be confidential, privileged, and exempt from public disclosure, and the
sender intends that it be used only by the individual or entity named above. If you are not the intended recipient, then you
may not use, disclose, copy, or distribute the e-mail or its contents. If you believe you have received this e-mail in error,
please immediately notify the sender and delete the copy you received.
2

BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF THE APPLICATION )
OF IDAHO POWER COMPANY FOR ) CASE NO. IPC-E-24-07
AUTHORITY TO INCREASE RATES FOR )
ELECTRIC SERVICE TO RECOVER )
COSTS ASSOCIATED WITH )
INCREMENTAL CAPITAL INVESTMENTS )
AND CERTAIN ONGOING OPERATIONS )
AND MAINTENANCE EXPENSES . )
IDAHO POWER COMPANY
DIRECT TESTIMONY
OF
MATTHEW T . LARKIN

1 Q. Please state your name, business address, and
2 present position with Idaho Power Company ("Idaho Power" or
3 "Company") .
4 A. My name is Matthew T. Larkin. My business
5 address is 1221 West Idaho Street, Boise, Idaho 83702 . I am
6 employed by Idaho Power as the Revenue Requirement Senior
7 Manager in the Regulatory Affairs Department.
8 Q. Please describe your educational background.
9 A. I received a Bachelor of Business
10 Administration degree in Finance from the University of
11 Oregon in 2007 . In 2008, I earned a Master of Business
12 Administration degree from the University of Oregon. I have
13 also attended electric utility ratemaking courses,
14 including the Electric Rates Advanced Course, offered by
15 the Edison Electric Institute, and Estimation of
16 Electricity Marginal Costs and Application to Pricing,
17 presented by National Economic Research Associates, Inc.
18 Q. Please describe your work experience with
19 Idaho Power.
20 A. I began my employment with Idaho Power as a
21 Regulatory Analyst in January 2009 . As a Regulatory
22 Analyst, I provided support for the Company' s regulatory
23 activities, including compliance reporting, financial
24 analysis, and the development of revenue forecasts for
25 regulatory filings .
LARKIN, DI 1
Idaho Power Company

1 In January 2014, I was promoted to Senior Regulatory
2 Analyst where my responsibilities expanded to include the
3 development of complex cost-related studies and the
4 analysis of strategic regulatory issues .
5 Since becoming the Revenue Requirement Senior
6 Manager in March 2016, I have overseen the Company' s
7 regulatory activities related to revenue requirement, such
8 as power supply expense modeling, jurisdictional separation
9 studies, and Idaho Power' s Open Access Transmission Tariff
10 formula rate.
11 I . OVERVIEW
12 Q. What is the purpose of your testimony in this
13 proceeding?
14 A. The purpose of my testimony in this proceeding
15 is twofold. First, I discuss the development of the Idaho
16 Results of Operations ("ROO") discussed in the Direct
17 Testimony of Company Witness, Mr. Timothy Tatum, Vice
18 President of Regulatory Affairs . Second, I detail the
19 methodology utilized to develop the revenue increase
20 requested in this case.
21 Q. How is your testimony organized?
22 A. My testimony is divided into two sections .
23 Section II provides a detailed discussion of the
24 development of the ROO that was performed at my direction,
25 and the conclusions that can be drawn from the analysis .
LARKIN, DI 2
Idaho Power Company

1 Section III of my testimony details each component of the
2 Company' s incremental revenue request related to the update
3 of capital and labor-related operations and maintenance
4 ("O&M") expense ("O&M Labor") .
5 Q. Did you consult with Mr. Tatum regarding the
6 development of the incremental revenue request?
7 A. Yes . The methodology utilized to develop the
8 incremental revenue request as presented in my testimony is
9 a direct result of numerous discussions with Mr. Tatum. I
10 will discuss the resulting methodology in detail in Section
11 III of my testimony.
12 Q. Did Mr. Tatum direct you to exclude any 2024
13 capital projects from the Company' s request in this case?
14 A. Yes . I was directed to exclude any expected
15 2024 capital projects associated with the Jim Bridger Power
16 Plant ("Bridger") and the North Valmy Generating Station
17 ("Valmy") from the incremental 2024 revenue requirement.
18 For each of these plants, Idaho Power currently has in
19 place separate rate mechanisms that utilize balancing
20 accounts and levelized revenue collection to smooth
21 recovery over the assets' remaining lives . Because of the
22 changing nature of operations at these facilities (i .e . ,
23 changing end-of-life assumptions and/or conversion to
24 natural gas) , Idaho Power intends to make a filing before
25 the Idaho Public Utilities Commission ("Commission") in the
LARKIN, DI 3
Idaho Power Company

1 coming months to update the mechanisms for both Bridger and
2 Valmy. Consequently, the Company has excluded 2024 Bridger
3 and Valmy investments from this case.
4 II . IDAHO RESULTS OF OPERATIONS
5 Q. What is the purpose of the ROO?
6 A. As detailed in Mr. Tatum' s testimony, the
7 purpose of the ROO is to demonstrate that existing rates
8 resulting from the settlement stipulation ("2023
9 Stipulation") approved in the Company' s most recently
10 completed general rate case, Case No. IPC-E-23-11 ("2023
11 GRC") , do not result in sufficient cost recovery given
12 expectations for 2024 . The ROO demonstrates that a rate
13 adjustment is needed to appropriately capture increasing
14 costs and ensure the Company remains financially healthy
15 and able to continue providing safe, reliable electric
16 service to customers .
17 Q. Please generally describe the methodology
18 utilized to develop the ROO.
19 A. The starting point for the ROO is actual 2023
20 year-end results . The Company then applied typical
21 ratemaking adjustments, such as the normalization of
22 revenues and the removal of non-rate case items such as
23 Energy Efficiency Rider ("Rider") funded expenses and
24 revenues, to develop adjusted year-end 2023 results
25 ("Adjusted 2023 Results") . Then, to provide a consistent
LARKIN, DI 4
Idaho Power Company

1 comparison with the results of the 2023 GRC, Idaho Power
2 applied certain ratemaking adjustments as contemplated in
3 the 2023 Stipulation to align the ROO with the
4 methodological results of that case. Finally, the Company
5 layered on incremental capital and 0&M Labor expectations
6 for 2024 to determine the sufficiency of current rates .
7 Q. Are you sponsoring any exhibits to support
8 your discussion of the ROO?
9 A. Yes . I am sponsoring two exhibits related to
10 the development of the ROO. Exhibit No. 5 provides a list
11 of adjustments made at each of the three steps utilized to
12 develop the ROO: 1) Adjusted 2023 Results, 2) 2023
13 Stipulation Adjustments, and 3) 2024 Incremental
14 Adjustments . Exhibit No. 6 contains the Excel model used to
15 calculate the ROO. Please note that Exhibit No. 6 contains
16 the summary results from the jurisdictional separation
17 study ("JSS") containing the results of this analysis; the
18 complete Excel model and supporting schedules are provided
19 as a comprehensive Excel file with formulas intact with my
20 workpapers accompanying this filing.
21 Adjusted 2023 Results
22 Q. How were the Adjusted 2023 Results developed?
23 A. To develop the Adjusted 2023 Results, Idaho
24 Power applied standard ratemaking adjustments to actual
25 year-end 2023 results .
LARKIN, DI 5
Idaho Power Company

1 Q. What standard ratemaking adjustments were
2 applied to rate base?
3 A. As further detailed in Exhibit No . 5, a number
4 of adjustments were made to rate base to reflect standard
5 Idaho ratemaking treatment . These adjustments include the
6 removal of typically non-allowable items such as
7 prepayments and non-land plant held for future use . In
8 addition, rate base associated with Bridger coal-related
9 investments and Valmy investments, including associated
10 accumulated depreciation, was removed as previously
11 discussed.
12 Q. What standard ratemaking adjustments were
13 applied to operating revenues?
14 A. Retail revenues were adjusted to reflect
15 weather normalized historical sales for 2023 including an
16 adjustment for revenues subject to the Sales Based
17 Adjustment. Federal Energy Regulatory Commission ("FERC")
18 Account 447, Sales for Resale, was set at 2013 base net
19 power supply expense ("NPSE") levels, as this was the
20 amount reflected in the Company' s base rates prior to the
21 implementation of the 2023 Stipulation effective January 1,
22 2024 . Rider revenues were removed, and Account 415 revenues
23 were added. Lastly, the Bridger and Valmy levelized revenue
24 requirement amounts were removed from retail revenues to
25 align with the corresponding removal of costs .
LARKIN, DI 6
Idaho Power Company

1 Q. What standard ratemaking adjustments were
2 applied to 0&M?
3 A. Standard expense adjustments were made that
4 reflect items typically excluded from rate proceedings in
5 Idaho, including image-related advertising, certain senior
6 management expenses, and certain purchasing card
7 transactions . In accordance with the previously described
8 treatment for Bridger and Valmy, non-fuel 0&M was removed
9 for these plants . In the same manner as Account 447, NPSE
10 accounts (501, 536, 547, 555, and 565) were all set to base
11 levels embedded in rates prior to the January 1, 2024,
12 tariff update resulting from the 2023 GRC. Rider-funded
13 expenses were removed to align with the treatment of Rider
14 revenues . Power cost deferrals were removed from Account
15 557 as these are out-of-period adjustments not reflected in
16 general rate filings . 0&M payroll was annualized and short-
17 term incentive was set to target levels for components
18 previously allowed for recovery from customers .
19 Q. What standard ratemaking adjustments were
20 applied to depreciation?
21 A. Depreciation expense was annualized for 2023
22 in accordance with the Company' s prior rate case practice .
23 Depreciation expense for Bridger coal-related investments
24 and Valmy investments was removed in accordance with the
LARKIN, DI 7
Idaho Power Company

1 treatment of other revenue requirement components related
2 to these plants .
3 Q. Were the remaining components of revenue
4 requirement adjusted in accordance with the other year-end
5 2023 adjustments you just described?
6 A. Yes . The remaining components of revenue
7 requirement, including Taxes Other Than Income Taxes and
8 Current Income Taxes, were all adjusted accordingly.
9 2023 Stipulation Adjustments
10 Q. Why did Idaho Power apply 2023 Stipulation
11 adjustments to the Adjusted 2023 Results?
12 A. As discussed previously, the intent of the ROO
13 is to evaluate if revenue through existing rates is
14 sufficient when taking into account growth in capital and
15 0&M Labor relative to the stipulated results of the 2023
16 GRC. To provide a consistent comparison between the outcome
17 of the 2023 GRC and the Company' s expectation for 2024,
18 certain adjustments were necessary to reflect ratemaking
19 treatment approved in the 2023 Stipulation.
20 Q. What items were adjusted to conform with the
21 2023 Stipulation?
22 A. To align the results of the ROO with the 2023
23 Stipulation, Idaho Power adjusted amounts related to
24 wildfire mitigation ("WM") , base NPSE, pension, Board of
25 Director ("BoD") costs, and retail revenues .
LARKIN, DI 8
Idaho Power Company

1 Q. How did Idaho Power apply the WM-related
2 provisions of the 2023 Stipulation to the Adjusted 2023
3 Results?
4 A. Idaho Power currently has in place a deferral
5 related to WM. To align with the 2023 Stipulation, Idaho
6 Power added to rate base the year-end 2023 WM deferral
7 balance. Additionally, an adjustment was made to set WM 0&M
8 at the approved levels in the 2023 GRC. Lastly, the Company
9 added the level of WM amortization expense approved through
10 the 2023 Stipulation.
11 Q. How did Idaho Power adjust base NPSE to align
12 with the 2023 Stipulation?
13 A. The 2023 Stipulation contained updated base
14 NPSE amounts for Accounts 447, 501, 536, 547, 555, and 565 .
15 Idaho Power updated the Adjusted 2023 Results to reflect
16 the new stipulated level of base NPSE.
17 Q. How did Idaho Power adjust pension
18 amortization?
19 A. Idaho Power adjusted pension amortization to
20 reflect the newly approved level contained in the 2023
21 Stipulation.
22 Q. How did Idaho Power adjust O&M for BoD costs?
23 A. In the 2023 Stipulation, Idaho Power agreed to
24 remove certain BoD-related compensation and expenses . The
LARKIN, DI 9
Idaho Power Company

1 Company removed the dollar amount associated with these
2 adjustments from 0&M.
3 Q. How did Idaho Power adjust retail revenues?
4 A. Retail rates reflecting the 2023 Stipulation
5 went into effect on January 1, 2024 . To appropriately
6 reflect this change, Idaho Power applied the newly approved
7 rates to normalized 2023 billing determinants .
8 Incremental 2024 Adjustments
9 Q. Why did Idaho Power layer on incremental 2024
10 adjustments in the final step of the R00?
11 A. The purpose of the R00 is to evaluate how well
12 the Company' s existing rates from the 2023 Stipulation
13 support its financial health in light of incremental
14 changes to capital and 0&M Labor in 2024 . Therefore, once
15 the Company adjusted year-end 2023 results for standard
16 ratemaking adjustments, then further modified these results
17 to align with the ratemaking treatment contemplated in the
18 2023 Stipulation, the final step in determining the
19 sufficiency of existing rates is to layer on increased
20 costs and revenues associated with capital and 0&M Labor in
21 2024 .
22 Q. What general methodology did Idaho Power
23 utilize to determine the incremental revenue requirement
24 related to incremental 2024 capital?
LARKIN, DI 10
Idaho Power Company

1 A. At a high level, Idaho Power estimated
2 incremental plant by comparing estimated year-end 2024
3 plant balances to amounts reflected in the 2023
4 Stipulation. Incremental accumulated depreciation and
5 amortization was set using a mid-year approach, and
6 depreciation expense was calculated by determining 12
7 months of expense based on year-end 2024 plant balances . I
8 will describe in detail the derivation of incremental
9 revenue requirement associated with 2024 capital
10 expenditures later in my testimony when I discuss the
11 calculation of the incremental revenue request in Section
12 III .
13 Q. What general methodology did Idaho Power
14 utilize to determine the incremental revenue requirement
15 related to incremental 0&M Labor?
16 A. At a high level, Idaho Power calculated
17 incremental 0&M Labor by comparing expected annualized 0&M
18 labor effective year-end 2024 to amounts reflected in the
19 2023 Stipulation. I will describe in detail the derivation
20 of incremental 0&M Labor later in my testimony when I
21 discuss the calculation of the incremental revenue request
22 in Section III .
23 Q. Was an adjustment to retail revenues necessary
24 as well?
LARKIN, DI 11
Idaho Power Company

1 A. Yes . In addition to cost growth in 2024, Idaho
2 Power expects to experience growth in retail sales as well .
3 Therefore, within the ROO an adjustment was made to reflect
4 incremental revenue collection associated with capital and
5 0&M Labor due to sales growth between the 2023 Stipulation
6 results and year-end 2024 . Similar to capital and O&M
7 Labor, I will expand on my explanation of this adjustment
8 later in my testimony.
9 ROO Results
10 Q. What are the results of the ROO after applying
11 the three sets of adjustments you just described?
12 A. After adjusting for standard ratemaking
13 treatment, aligning with the results of the 2023
14 Stipulation, and applying incremental capital and O&M
15 Labor, the results of the ROO indicate existing rates fall
16 short of revenues required to maintain the financial health
17 of Idaho Power. As shown in cell H47 of the "JSS - 2024
18 Increment" tab of Exhibit No. 6, the ROO indicates an
19 expected rate of return ("ROR") of 5 . 80 percent, which
20 reflects a return on equity ("ROE") of 6 . 7 percent . These
21 values are well below the Company' s currently authorized
22 ROR of 7 .247 percent and currently authorized ROE of 9 . 6
23 percent.
24 Q. Based on these results, is it necessary to
25 increase Idaho Power' s retail rates?
LARKIN, DI 12
Idaho Power Company

1 A. Yes . The 2024 incremental revenue request,
2 which I will discuss in detail in the next section of my
3 testimony, is justified and necessary given the results of
4 the ROO. Absent a rate increase, the expected rates of
5 return are insufficient to maintain the financial health of
6 Idaho Power as it continues to make significant levels of
7 investment in the electrical grid to ensure safe, reliable
8 service to customers .
9 III . DEVELOPMENT OF INCREMENTAL REVENUE REQUIREMENT REQUEST
10 Q. Is the development of the incremental revenue
11 requirement based on the analysis performed for the ROO?
12 A. No. The intent of the ROO is different from
13 the intent of the incremental revenue requirement
14 calculation, and therefore the underlying methodologies are
15 not the same . The intent of the ROO was to evaluate the
16 sufficiency of current rates as applied to 2024
17 expectations based on year-end 2023 results, while the
18 intent of the incremental revenue requirement request is to
19 determine the amount of incremental revenue necessary to
20 account for increases to capital and 0&M Labor between the
21 results of the 2023 Stipulation and expectations for 2024 .
22 While the two analyses share some inputs, it is important
23 to recognize that the determination of the incremental
24 revenue requirement was performed as a standalone analysis .
LARKIN, DI 13
Idaho Power Company

1 Q. What was Idaho Power' s general approach to
2 developing the incremental revenue requirement in this
3 case?
4 A. As discussed in Mr. Tatum' s testimony, the
5 Company' s revenue request reflects the revenue requirement
6 associated with incremental 2024 capital and O&M Labor
7 relative to amounts approved for recovery in the 2023
8 Stipulation. To determine the rate increase requested in
9 this case, the Company computed the revenue requirement on
10 these isolated components .
11 Determination of Incremental 2024 Capital
12 Q. How did Idaho Power determine incremental 2024
13 capital?
14 A. The starting point for incremental 2024
15 capital is year-end 2023 actual plant balances . The
16 December 31, 2023, actual plant balances were adjusted to
17 remove Bridger coal-related amounts, all Valmy plant and
18 remaining plant from the Boardman power plant ("Boardman") .
19 The Company then estimated 2024 capital closings utilizing
20 the same general method applied in the 2023 GRC (i .e . , by
21 bifurcating expected plant closings into projects above and
22 below $8 million) , then applying different methodologies to
23 each category.
24 Q. How did Idaho Power determine 2024 plant
25 closings for projects greater than $8 million?
LARKIN, DI 14
Idaho Power Company

1 A. Idaho Power estimates that eight projects over
2 $8 million will close in 2024 . For each of these projects,
3 the Company began with year-end 2023 construction work-in-
4 process ("CWIP") , then developed a forecasted close amount
5 and timing by project with the respective business unit
6 managers . Each of these eight projects is discussed in
7 detail throughout the Direct Testimonies of Company
8 Witnesses Mr. Eric Hackett and Mr. Mitch Colburn.
9 Q. How did Idaho Power determine 2024 plant
10 closings for projects less than $8 million?
11 A. For projects less than $8 million, Idaho Power
12 first calculated a five-year average of the ratio between
13 the previous year' s CWIP balance and the percent of project
14 closings in the subsequent year. This ratio was then
15 applied to the year-end 2023 CWIP balance to determine
16 estimated 2024 closings . These closings were then spread to
17 FERC accounts based on a five-year history of plant
18 closings from 2019 through 2023 .
19 Q. Do Idaho Power' s estimated 2024 plant levels
20 account for retirements?
21 A. Yes . For the majority of FERC accounts, Idaho
22 Power estimated 2024 retirements using a five-year average
23 for the time period 2019 through 2023 . Accounts 302, 303,
24 391, 393, 394, 395, 397, and 398 have known retirement
LARKIN, DI 15
Idaho Power Company

1 dates and amounts based on vintage layers and therefore
2 estimates were not necessary.
3 Q. How did Idaho Power calculate accumulated
4 depreciation related to 2024 plant balances?
5 A. Accumulated depreciation was determined based
6 on a mid-year convention. The 2024 forecast was developed
7 by first determining the actual year-end 2023 balance and
8 then building upon that to determine the 2024 monthly
9 balances . The December 31, 2023, actual accumulated
10 depreciation reserve balance was adjusted to remove Bridger
11 coal-related accumulated depreciation, and all Valmy
12 accumulated depreciation. Land does not depreciate so there
13 was no adjustment for Boardman. The mid-year average was
14 determined by adding the adjusted December 2023 balance and
15 the forecasted December 2024 balance and dividing the total
16 by two .
17 Q. How did Idaho Power calculate expected
18 depreciation expense?
19 A. To determine expected depreciation expense,
20 Idaho Power applied annual depreciation rates approved in
21 Commission Order No. 35272' to expected plant balances at
22 month-end December 2024 to determine a full year of
23 depreciation expense.
1 In the Matter of Idaho Power Company's Application for Authority to
Increase its Rates Due to Revised Depreciation Rates for Electric
Plant-In-Service, Case No. IPC-E-21-18.
LARKIN, DI 16
Idaho Power Company

1 Q. How did the Company calculate incremental
2 capital utilized in the revenue requirement computation
3 once it had calculated expected 2024 values?
4 A. Once the Company determined expected 2024
5 values, an account-by-account comparison was performed
6 relative to approved capital components from the 2023
7 Stipulation. Exhibit No. 7 presents this account-by-account
8 comparison utilized to determine the incremental revenue
9 requirement components related to 2024 plant.
10 Q. What are the results of the analysis as
11 presented in Exhibit No. 7?
12 A. The analysis presented in Exhibit No . 7 shows
13 the composition of the approximately $860 million in
14 incremental 2024 plant by FERC account. Column C contains
15 plant amounts reflected in the 2023 Stipulation, while
16 Column D provides expected 2024 plant levels calculated in
17 accordance with the methodology I just described. A
18 complete Excel file containing supporting schedules with
19 formulas intact is included in my workpapers accompanying
20 this filing.
21 Determination of Incremental 2024 O&M Labor
22 Q. What components of labor are reflected in the
23 Company' s incremental revenue request?
24 A. The incremental revenue request only includes
25 0&M Labor related to wages and salaries, including
LARKIN, DI 17
Idaho Power Company

1 benefits, loadings, and short-term incentive for non-
2 officers . All other components of labor and benefits are
3 excluded from the determination of incremental labor costs
4 in this case.
5 Q. How did Idaho Power calculate expected 2024
6 0&M Labor?
7 A. Expected 2024 0&M Labor was calculated
8 utilizing the same general methodology applied in the
9 Company' s 2023 GRC. First, the Company developed a three-
10 year history of the ratio between February year-to-date 0&M
11 Labor expenses and full year 0&M Labor expenses . This ratio
12 was then applied to month-end February 2024 year-to-date
13 0&M Labor to determine the expectation of full year 2024
14 0&M Labor expenses . An annualizing adjustment was then
15 applied based on year-end 2023 levels, and a 2025 general
16 wage adjustment ("GWA") of 3 percent was added.
17 Q. How was the 2024 expectation determined for
18 short-term incentive?
19 A. In line with prior filings, Idaho Power
20 adjusted the short-term incentive to reflect target levels
21 for just the Customer Satisfaction and Reliability
22 components for non-officers .
23 Q. How did Idaho Power determine the incremental
24 labor request based on the expectation of 2024 O&M Labor?
LARKIN, DI 18
Idaho Power Company

1 A. Expected 2024 O&M Labor amounts were compared
2 to 0&M Labor reflected in the 2023 Stipulation. To isolate
3 wages and salaries, a number of adjustments were required
4 to ensure that other components of labor expense were not
5 included in the incremental revenue requirement developed
6 in this case. This includes an adjustment to remove the
7 impact of the mid-year 2022 GWA that was excluded from
8 revenue requirement as part of the 2023 Stipulation.
9 Q. Are you sponsoring an exhibit that details the
10 comparison of 2024 0&M Labor to the stipulated results of
11 the 2023 GRC?
12 A. Yes . Exhibit No. 8 steps through the
13 determination of incremental revenue requirement related to
14 2024 0&M Labor.
15 Q. What are the results of the analysis presented
16 in Exhibit No. 8?
17 A. Exhibit No. 8 details how the system
18 incremental labor in the amount of $19, 557, 535 was
19 determined. This value can be found in cell E88 of Exhibit
20 No . 8 .
21 Determination of Incremental Revenue Requirement
22 Q. Once incremental capital and O&M Labor were
23 determined, how did Idaho Power calculate the ultimate rate
24 increase requested in this case?
LARKIN, DI 19
Idaho Power Company

1 A. Once the incremental revenue requirement
2 components were determined by FERC account, Idaho Power
3 applied the jurisdictional allocation factors from the JSS
4 from the 2023 Stipulation to determine the Idaho
5 jurisdictional portion of each revenue requirement
6 component.
7 Q. Were any other adjustments required to
8 calculate the appropriate revenue increase requested in
9 this case?
10 A. Yes . Because the rate increase requested in
11 this case is intended to update the results of the 2023 GRC
12 for two specific components of revenue requirement,
13 increased revenue collection due to sales growth between
14 the 2023 Stipulation and 2024 must be considered as well,
15 serving as an offset to the increase in costs contemplated
16 in this case.
17 Q. How did Idaho Power determine the appropriate
18 level of revenue growth to apply as an offset?
19 A. Exhibit No. 9 walks through the calculation of
20 the revenue growth offset applied in this case . First,
21 Idaho Power determined an estimated cents-per-kilowatt-hour
22 ("kWh") rate of cost recovery for capital-related items and
23 0&M Labor that is currently embedded in retail rates as a
24 result of the 2023 GRC. Then, the Company determined the
25 estimated kWh sales growth between the stipulated results
LARKIN, DI 20
Idaho Power Company

1 of the 2023 GRC and 2024 . The cents-per-kWh rate was
2 applied to the kWh sales growth to determine the estimated
3 increase in recovery related to capital and O&M Labor. As
4 shown in cell A14, the revenue growth offset applied in
5 this case is $5 . 5 million.
6 Q. What is the Company' s requested rate increase
7 after taking into account incremental capital and 0&M
8 Labor, offset by incremental revenue collection?
9 A. Exhibit No. 10 details the results of the
10 incremental revenue requirement quantification. The system
11 incremental revenue requirement by FERC account is
12 presented in Column F, while the Idaho-allocated portion is
13 presented in Column G. The revenue growth offset of $5 . 5
14 million is applied in cell G45 . As shown in cell G43, the
15 Company' s requested increase in this case is $99 . 3 million,
16 or 7 . 31 percent.
17 Q. In the 2023 Stipulation, the Commission
18 authorized Idaho Power to utilize Investment Tax Credits
19 ("ITC") to offset the revenue requirement associated with
20 battery projects expected to come online in the 2023 GRC
21 test year ("2023 Battery Projects") . Is Idaho Power
22 proposing to modify that treatment in this case?
23 A. No. Embedded in Idaho Power' s existing rates
24 is a reduction equivalent to the revenue requirement of the
25 2023 Battery Projects . The incremental revenue requirement
LARKIN, DI 21
Idaho Power Company

1 calculation in this case has no impact on this existing
2 revenue requirement reduction. In other words, the proposed
3 rates effective January 1, 2025, would maintain the
4 stipulated offset to the 2023 Battery Projects revenue
5 requirement that currently exists today.
6 IV. CONCLUSION
7 Q. Please summarize your testimony.
8 A. Idaho Power performed an ROO to determine the
9 ability of existing rates to maintain the financial health
10 of the Company as it continues to make significant
11 investment in the safe, reliable operation of the
12 electrical grid. This analysis began with year-end 2023
13 results, then applied standard ratemaking adjustments,
14 changes related to the 2023 Stipulation, and expected 2024
15 costs, ultimately demonstrating that current rates are
16 insufficient to support the Company' s operations while
17 maintaining its financial health.
18 Given the results of the ROO, the Company calculated
19 an incremental rate increase based on expected capital
20 expenditures and 0&M Labor costs in 2024, updating the
21 results of the 2023 Stipulation for these two revenue
22 requirement components . The resulting analysis determined
23 that an increase to current revenues of $99 . 3 million, or
24 7 . 31 percent, is necessary to ensure timely cost recovery
LARKIN, DI 22
Idaho Power Company

1 and provide the Company with the necessary financial
2 stability.
3 Q. Would approval of the requested rate increase
4 result in fair, just, and reasonable rates?
5 A. Yes . The Company' s proposed methodology in
6 this case would provide rate relief that is commensurate
7 with the ongoing needs of the system, appropriately
8 balancing affordability with the investment required to
9 build, operate, and maintain a safe and reliable electrical
10 grid.
11 Q. Does this conclude your direct testimony in
12 this case?
13 A. Yes, it does .
14
15
16
LARKIN, DI 23
Idaho Power Company

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BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION
CASE NO. IPC-E-24-07
IDAHO POWER COMPANY
LARKIN , DI
TESTIMONY
EXHIBIT NO. 5

Exhibit No. 5
Results of Operations Adjustment Summary
Idaho Power Company — IPC-E-24-07
The following document summarizes adjustments made to year-end 2023 actuals to complete
the Idaho Results of Operations ("ROO") analysis. The adjustments are applied in three
sequential steps:
1) 2023 Ratemaking Adjustments;
2) 2023 Stipulation Adjustments; and
3) 2024 Incremental Adjustments.
The adjustments in this document correspond to the analysis results presented in Exhibit No. 6:
Results of Operations.xlsx. The complete Excel model and supporting schedules are provided
as a comprehensive Excel file with formulas intact in Mr. Larkin's workpapers accompanying
this filing. The final results of the ROO as contained in Exhibit No. 6 can be found in the
comprehensive workpaper model on the "JSS —2024 Increment" tab.' For ease of reference,
when possible, the adjustments are delineated by the corresponding table in the respective
jurisdictional separation study ("JSS") tabs (e.g., Table 1 — Electric Plant in Service).
Step 1 : 2023 Ratemakinq Adjustments
Standard ratemaking adjustments are applied to year-end 2023 results to capture typical
regulatory treatment of revenue requirement components, including the normalization of
revenues and the removal of non-rate case items such as Energy Efficiency Rider ("Rider")
expenses and revenues, to develop the Adjusted 2023 Results.
General Adjustments
• Removed Jim Bridger Power Plant ("Bridger") and North Valmy Generating Station
("Valmy") components from 2023 actuals. This flows through to each subsequent step in
the analysis.
• Added construction work-in-process ("CWIP") for Hells Canyon Complex ("HCC")
relicensing into the computation of the revenue deficiency to account for currently
authorized collection of HCC allowance-for-funds-used-during-construction.
• Set Idaho Energy Resources Company ("IERCo") operating income to the December 31,
2023 balance.
• Demand and energy jurisdictional allocations reflect normalized 2023 data.
Table 1 — Electric Plant in Service CEPIS")
• Removed Bridger Coal and Val my Plant (1 3-monthaverage).
1 Please note the "2023 Stipulation Adjustments" and the "2024 Incremental Adjustments"were applied
within the same tab of the model, therefore there is not a separate tab that isolates the results of Step 2
prior to applying the 2024 Incremental Adjustments detailed in Step 3.
Exhibit No.5
Case No. IPC-E-24-07
M.Larkin, IPC
Page 1 of 4

Table 2 —Accumulated Depreciation and Amortization
• Removed Bridger Coal and Valmy 13-month average and associated annualizing
adjustment.
• Applied annualizing adjustment that includes a reserve adjustment equal to one-half of
the depreciation expense annualizing adjustment.
Table 3— Other Rate Base Items
• Account 282: Adjusted based on adjustments to plant, as well as an adjustment for
Bridger and Valmy deferred tax to ensure the reduction flows through appropriately.
• Fuel Inventory: Adjusted to reflect required fuel inventory per general rate case ("GRC")
methodology.
• Removed prepayments.
• Adjusted Plant Held for Future Use to only reflect Land Held for Future Use.
• Added Accounts 114/115.
Table 4 — Operating Revenues
• Normalized 2023 retail revenues.
o Removed levelized Bridger and Valmy revenue requirement.
o Removed revenues subject to Sales Based Adjustment.
• Account 447 revenues set at 2013 base net power supply expense ("NPSE") levels to
match amounts reflected in 2023 retail rates/2023 normalized revenues.
• Removed Account 456: Rider revenues.
• Added Account 415.
Table 5— Operations and Maintenance Expense ("O&M")
• Typical GRC O&M deductions include general advertising expenses, certain
memberships and contributions, senior management expenses, and miscellaneous other
expenses as detailed below:
o Advertising (Account 930.1)
o Senior management expenses (Account 930.2)
o Miscellaneous expenses (Purchasing Card charges) (Account 930.2)
o Certain memberships and contributions (Account 930.2)
• Other adjustments to O&M:
o Removed Account 908: Rider Funded Expenses.
o Removed 2023 actual Bridger and Valmy O&M.
o NPSE Accounts (501, 536, 547, 555 & 565): set at 2013 base levels to match
amounts reflected in 2023 retail rates/ 2023 normalized revenues.
o Account 557: Removed Power Cost Adjustment deferrals.
o Account 920: Adjusted short-term incentive to reflect target levels for Customer
Satisfaction and Reliability.
o Added GRC payroll annualizing adjustment.
o Added Account 416.
Exhibit No.5
Case No. IPC-E-24-07
M.Larkin, IPC
Page 2 of 4

Table 6 — Depreciation/Amortization Expense
• Annualized per typical GRC methodology.
• Removed Bridger coal and Valmy depreciation expense.
• Removed 411.8.
Table 7—Taxes Other Than Income Taxes
• Removed Federal Insurance Contribution Act ("FICA"), Federal Unemployment Tax Act
("FUTA"), Payroll, and Unemployment taxes.
• Normalized Hydro Generation kilowatt-hour ("kWh") tax.
Tables 9-12 — Current Income Taxes
• Adjustments calculated on a system basis to align with other adjustments detailed
above.
• Adjusted taxes to reflect Bridger and Valmy removal.
Step 2: 2023 Stipulation Adjustments
Table 3— Other Rate Base Items
• Added Wildfire mitigation deferral year-end 2023 balance.
Table 4 — Operating Revenues
• Adjusted retail revenues to reflect January 1, 2024, rates applied to 2023 normalized
billing determinants.
o Removed levelized Bridger and Valmy revenue requirement.
• Account 447 revenues set at new 2023 base NPSE level approved in 2023 General
Rate Case, IPC-E-23-11 ("2023 GRC').
Table 5— O&M
• Adjusted Board of Directors ("BoD") costs to align with treatment from 2023 Stipulation.
• NPSE Accounts 501, 536, 547, 555, and 565 set at new base approved in 2023 GRC.
• Wildfire mitigation O&M set at new level approved in 2023 GRC.
• Idaho pension amortization set at new level approved in 2023 GRC.
Table 8— Regulatory Debits and Credits
• Added wildfire mitigation amortization as approved in 2023 GRC.
Exhibit No.5
Case No. IPC-E-24-07
M. Larkin, IPC
Page 3 of 4

Step 3: 2024 Incremental Adjustments
Table 1 — EPIS
• Added incremental 2024 plant.
Table 2 —Accumulated Depreciation and Amortization
• Added mid-year incremental Depreciation and Amortization for incremental plant.
Table 3— Other Rate Base Items
• Account 282: Adjusted to reflect ending balance for incremental plant additions.
Table 4 — Operating Revenues
• Added incremental revenue due to sales growth associated with plant and O&M labor
embedded in rates approved in the 2023 GRC.
Table 5— O&M
• Added incremental labor expenses.
Table 6— Depreciation/Amortization Expense
• Annualized depreciation expense based on year-end 2024 balances.
Tables 9-12 —Current Income Taxes
• Adjusted tax for incremental 2024 plant.
Exhibit No.5
Case No. IPC-E-24-07
M. Larkin, IPC
Page 4 of 4

BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION
CASE NO. IPC-E-24-07
IDAHO POWER COMPANY
LARKIN , DI
TESTIMONY
EXHIBIT NO. 6

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
9''"SUMMARY OF RESULTS'"
10
11 DEVELOPMENT OF RATE BASE COMPONENTS
12
13 ELECTRIC PLANT IN SERVICE 7,098,961,062 6,797,524,777 301,436,285
14 LESS:ACCUM PROVISION FOR DEPRECIATION 2,190,309,473 2,096,603,554 93,705,920
15 AMORT OF OTHER UTILITY PLANT 47,594,769 45,681,683 1,913,086
16 NET ELECTRIC PLANT IN SERVICE 4,861,056,819 4,655,239,540 205,817,279
17 LESS:CUSTOMER ADV FOR CONSTRUCTION 32,170,424 32,110,363 60,062
18 LESS:A000M DEFERRED INCOME TAXES 387,672,810 371,048,649 16,624,160
19 ADD:PLT HLD FOR FUTURE+ACQUIS ADJ 628,247 628,247 -
20 ADD:WORKING CAPITAL 139,484,205 133,445,511 6,038,694
21 ADD:CONSERVATION+OTHERDFRDFROG. 51,563,314 46,360,137 5,203,177
22 ADD:SUBSIDIARY RATE BASE 36,192,061 34,665,124 1,526,937
23
24 TOTAL COMBINED RATE BASE 4,669,081,412 4,467,179,547 201,901,865
25
26 RATE OF RETURN UNDER PRESENT RATES
27 OPERATING REVENUES
28 SALES REVENUES 1,312,879,048 1,257,826,285 55,052,763
29 OTHER OPERATING REVENUES 90,445,486 86,982,202 3,463,284
30 TOTAL OPERATING REVENUES 1,403,324,534 1,344,808,487 58,516,046
31 OPERATING EXPENSES
32 OPERATION&MAINTENANCE EXPENSES 934,441,471 893,018,187 41,423,284
33 DEPRECIATION EXPENSE 174,034,269 166,800,152 7,234,117
34 AMORTIZATION OF LIMITED TERM PLANT 8,949,407 8,584,623 364,784
35 ACCRETION EXPENSE 12,995 12,485 509
36 TAXES OTHER THAN INCOME 25,554,161 23,444,410 2,109,751
37 REGULATORY DEBITS/CREDITS 5,657,329 5,339,621 317,709
38 PROVISION FOR DEFERRED INCOME TAXES (15,424,032) (14,807,844) (616,189)
39 INVESTMENT TAX CREDIT ADJUSTMENT 124,171,136 118,895,080 5,276,056
40 FEDERAL INCOME TAXES (101,137,048) (97,803,208) (3,333,840)
41 STATE INCOME TAXES (10,554,538) (10,146,359) (408,178)
42 TOTAL OPERATING EXPENSES 1,145,705,150 1,093,337,148 52,368,003
43 OPERATING INCOME 257,619,383 251,471,339 6,148,044
44 ADD: IER00 OPERATING INCOME Eio 8,033,987 7,695,035 338,953
45 CONSOLIDATED OPERATING INCOME 265,653,371 259,166,374 6,486,997
46
47 RATE OF RETURN UNDER PRESENT RATES 5.69% 5.80% 3.21%
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 1 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
48*"'SUMMARY OF RESULTS***
49
50 RATE OF RETURN UNDER PRESENT RATES
51 TOTAL COMBINED RATE BASE 4,669,081,412 4,467,179,547 201,901,865
52
53 SALES REVENUES 1,312,879,048 1,257,826,285 55,052,763
54 OTHER OPERATING REVENUES 90,445,486 86,982,202 3,463,284
55 TOTAL OPERATING REVENUES 1,403,324,534 1,344,808,487 58,516,046
56 OPERATING EXPENSES
57 OPERATION&MAINTENANCE EXPENSES 934,441,471 893,018,187 41,423,284
58 DEPRECIATION EXPENSE 174,034,269 166,800,152 7,234,117
59 AMORTIZATION OF LIMITED TERM PLANT 8,949,407 8,584,623 364,784
60 ACCRETION EXPENSE 12,995 12,485 509
61 TAXES OTHER THAN INCOME 25,554,161 23,444,410 2,109,751
62 REGULATORY DEBITS/CREDITS 5,657,329 5,339,621 317,709
63 PROVISION FOR DEFERRED INCOME TAXES (15,424,032) (14,807,844) (616,189)
64 INVESTMENT TAX CREDIT ADJUSTMENT 124,171,136 118,895,080 5,276,056
65 FEDERAL INCOME TAXES (101,137,048) (97,803,208) (3,333,840)
66 STATE INCOME TAXES (10,554,538) (10,146,359) (408,178)
67 TOTAL OPERATING EXPENSES 1,145,705,150 1,093,337,148 52,368,003
68 OPERATING INCOME 257,619,383 251,471,339 6,148,044
69 ADD: IER00 OPERATING INCOME 8,033,987 7,695,035 338,953
70 CONSOLIDATED OPERATING INCOME 265,653,371 259,166,374 6,486,997
71 RATE OF RETURN UNDER PRESENT RATES 5.69% 5.80% 3.21%
72
73 DEVELOPMENT OF REVENUE REQUIREMENTS
74 RATE OF RETURN REQUIRED(BASED ON 10%ROE) 7.247% 7.247% 7.247%
75
76 RETURN AT CLAIMED RATE OF RETURN 338,368,330 323,736,502 14,631,828
77 EARNINGS DEFICIENCY 72,714,959 64,570,128 8,144,832
78 ADD:CWIP(RELICENSING) 6,815,472 6,520,122 295,350
79 DEFICIENCY WITH CWIP 79,530,431 71,090,250 8,440,182
80
81 NET-TO-GROSS TAX MULTIPLIER 1.347 1.347 1.347
82
83 REVENUE DEFICIENCY 107,127,491 95,758,566 11,368,925
84
85 FIRM JURISDICTIONAL REVENUES 1,283,843,868 1,230,016,095 53,827,773
86
87 PERCENT INCREASE REQUIRED 8.34% 7.79% 21.12%
88
89 SALES AND WHEELING REVENUES REQUIRED 1,390,971,359 1,325,774,661 65,196,698
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 2 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
90***TABLE 1-ELECTRIC PLANT IN SERVICE
91
92 INTANGIBLE PLANT
93 301-ORGANIZATION P1o1P 5,703 5,461 242
94 302-FRANCHISES&CONSENTS Dio 67,301,183 64,641,493 2,659,690
95303-MISCELLANEOUS P1o1P 77,770,770 74,466,275 3,304,495
96
97 TOTAL INTANGIBLE PLANT 145,077,656 139,113,229 5,964,428
98
99 PRODUCTION PLANT
100310-316/STEAM PRODUCTION D10 297,714,102 285,948,673 11,765,429
101330-336/HYDRAULIC PRODUCTION D10 1,211,835,338 1,163,944,550 47,890,789
102 340-346/OTHER PRODUCTION-LANGLEY D10 415,522,763 399,101,627 16,421,136
103 340-346/OTHER PRODUCTION-DANSKIN/BENNETT MTN D70 202,289,103 194,294,795 7,994,308
104
105 TOTAL PRODUCTION PLANT 2,127,361,308 2,043,289,646 84,071,662
106
107 TRANSMISSION PLANT
108 350/LAND&LAND RIGHTS
109 SYSTEM TRANSMISSION SERVICE D11 45,123,558 43,340,310 1,783,248
110 DIRECT ASSIGNMENT DA350 - - -
III TOTAL ACCOUNT350 45,123,558 43,340,310 1,783,248
112
113 352/STRUCTURES&IMPROVEMENTS
114 SYSTEM TRANSMISSION SERVICE D11 110,977,804 106,592,048 4,385,756
115 DIRECT ASSIGNMENT DA352 658 - 658
116 TOTAL ACCOUNT 352 110,978,462 106,592,048 4,386,415
117
118 353/STATION EQUIPMENT
119 SYSTEM TRANSMISSION SERVICE DII 509,721,302 489,577,513 20,143,789
120 DIRECT ASSIGNMENT DA353 111,594 75,100 36,494
121 TOTAL ACCOUNT 353 509,832,896 489,652,613 20,180,283
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 3 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
122—TABLE TABLE 1-ELECTRIC PLANT IN SERVICE"*"
123
124 3541 TOWERS&FIXTURES
125 SYSTEM TRANSMISSION SERVICE Dii 249,756,890 239,886,692 9,870,198
126 DIRECT ASSIGNMENT DA354 - - -
127 TOTAL ACCOUNT 354 249,756,890 239,886,692 9,870,198
128
129 355/POLES&FIXTURES
130 SYSTEM TRANSMISSION SERVICE oil 271,451,233 260,723,692 10,727,541
131 DIRECT ASSIGNMENT DA355 33,842 - 33,842
132 TOTAL ACCOUNT 355 271,485,075 260,723,692 10,761,383
133
134 356/OVERHEAD CONDUCTORS&DEVICES
135 SYSTEM TRANSMISSION SERVICE D11 290,260,290 278,789,429 11,470,861
136 DIRECT ASSIGNMENT DA356 26,495 1,189 25,306
137 TOTAL ACCOUNT 356 290,286,785 278,790,618 11,496,167
138
139 359/ROADS&TRAILS
140 SYSTEM TRANSMISSION SERVICE D11 406,231 390,177 16,054
141 DIRECT ASSIGNMENT DA359 - - -
142 TOTAL ACCOUNT 359 406,231 390,177 16,054
143
144 TOTAL TRANSMISSION PLANT 1,477,869,896 1,419,376,150 58,493,747
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 4 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
145***TABLE 1-ELECTRIC PLANT IN SERVICE
146
147 DISTRIBUTION PLANT
148
149 360/LAND&LAND RIGHTS ACCT360 9,815,237 9,399,050 416,188
150 361/STRUCTURES&IMPROVEMENTS ACCT361 73,809,666 70,595,724 3,213,942
151 362/STATION EQUIPMENT ACCT362 361,390,672 346,674,746 14,715,926
152363/BATTERY STORAGE D70 307,577,615 295,422,387 12,155,228
153 364/POLES,TOWERS&FIXTURES DA364 366,804,146 338,067,715 28,736,431
154365/OVERHEAD CONDUCTORS&DEVICES DA365 172,940,993 163,251,293 9,689,700
155 366/UNDERGROUND CONDUIT DA366 62,328,189 61,327,088 1,001,101
156 367/UNDERGROUND CONDUCTORS&DEVICES DA367 385,071,509 379,263,738 5,807,772
157368/LINE TRANSFORMERS ACCT368 824,478,027 779,265,187 45,212,840
158 369/SERVICES DA369 74,883,706 71,799,683 3,084,023
159 370/METERS ACCT370 124,776,385 120,955,838 3,820,547
160 371/INSTALLATIONS ON CUSTOMER PREMISES DA371 6,504,019 6,077,640 426,379
161 373/STREET LIGHTING SYSTEMS DA373 7,620,938 7,241,643 379,296
162
163 TOTAL DISTRIBUTION PLANT 2,778,001,103 2,649,341,730 128,659,372
164
165 GENERAL PLANT
166 389/LAND&LAND RIGHTS PTD 21,145,439 20,246,965 898,474
167 390/STRUCTURES&IMPROVEMENTS PTD 178,056,002 170,490,368 7,565,634
168 391/OFFICE FURNITURE&EQUIPMENT PTD 46,142,473 44,181,870 1,960,603
169 392/TRANSPORTATION EQUIPMENT PTD 149,671,758 143,312,176 6,359,582
170 393/STORES EQUIPMENT PTD 9,276,437 8,882,279 394,158
171 394/TOOLS,SHOP&GARAGE EQUIPMENT PTD 16,531,852 15,829,411 702,442
172 395/LABORATORY EQUIPMENT PTD 17,688,809 16,937,208 751,601
173 396/POWER OPERATED EQUIPMENT PTD 32,527,731 31,145,621 1,382,110
174 397/COMMUNICATIONS EQUIPMENT PTD 88,540,127 84,778,040 3,762,087
175 398/MISCELLANEOUS EQUIPMENT PTD 11,070,472 10,600,085 470,386
176
177 TOTAL GENERAL PLANT 570,651,099 546,404,023 24,247,076
178
179 TOTAL ELECTRIC PLANT IN SERVICE 7,098,961,062 6,797,524,777 301,436,285
180
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 5 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
181 ***TABLE 2-ACCUMULATED PROVISION FOR DEPRECIATION*
182
183 PRODUCTION PLANT
184 310-316/STEAM PRODUCTION L 100 192,595,403 184,984,183 7,611,220
185 330-336/HYDRAULIC PRODUCTION L101 536,257,268 515,064,799 21,192,470
186 340-346/OTHER PRODUCTION-LANGLEY L102 86,016,347 82,617,048 3,399,299
187 340-346/OTHER PRODUCTION-DANSKIN/BENNETT MTN L103 64,781,409 62,221,298 2,560,111
188 TOTAL PRODUCTION PLANT 879,650,427 844,887,327 34,763,100
189
190 TRANSMISSION PLANT
191 350/LAND&LAND RIGHTS L 111 10,640,184 10,219,692 420,492
192 352/STRUCTURES&IMPROVEMENTS L116 35,178,162 33,787,748 1,390,414
193 353/STATION EQUIPMENT L 121 125,602,861 120,631,230 4,971,631
194 354/TOWERS&FIXTURES L 127 82,555,492 79,292,963 3,262,529
195355/POLES&FIXTURES L132 81,819,694 78,576,448 3,243,247
196356/OVERHEAD CONDUCTORS&DEVICES L137 89,515,586 85,970,519 3,545,067
197359/ROADS&TRAILS L142 300,145 288,284 11,861
198 TOTAL TRANSMISSION PLANT 425,612,124 408,766,883 16,845,241
199
200 DISTRIBUTION PLANT
201 360/LAND&LAND RIGHTS L 149 267,036 255,713 11,323
202 361/STRUCTURES&IMPROVEMENTS L150 17,597,451 16,831,194 766,257
203 362/STATION EQUIPMENT L 151 76,945,502 73,812,260 3,133,242
204363/BATTERY STORAGE L152 7,339,093 7,049,058 290,035
205 364/POLES,TOWERS&FIXTURES L 153 148,616,411 136,973,399 11,643,013
206365/OVERHEAD CONDUCTORS&DEVICES L154 59,437,082 56,106,885 3,330,196
207 366/UNDERGROUND CONDUIT L 155 19,957,781 19,637,224 320,557
208 367/UNDERGROUND CONDUCTORS&DEVICES L 156 109,843,417 108,186,724 1,656,694
209 368/LINE TRANSFORMERS L 157 206,097,998 194,795,968 11,302,031
210 369/SERVICES L 158 46,522,754 44,606,753 1,916,001
211 370/METERS L 159 40,491,460 39,251,646 1,239,814
212 371/INSTALLATIONS ON CUSTOMER PREMISES L160 1,018,383 951,621 66,761
213373/STREET LIGHTING SYSTEMS L161 1,852,662 1,760,454 92,207
214 TOTAL DISTRIBUTION PLANT 735,987,029 700,218,898 35,768,131
215
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 6 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
216***TABLE 2-ACCUMULATED PROVISION FOR DEPRECIATION`
217
218 GENERAL PLANT
219 389/LAND&LAND RIGHTS L 166 - - -
220390/STRUCTURES&IMPROVEMENTS L167 37,467,073 35,875,090 1,591,983
221 391/OFFICE FURNITURE&EQUIPMENT L 168 19,565,369 18,734,033 831,336
222 392/TRANSPORTATION EQUIPMENT L 169 27,046,555 25,897,341 1,149,213
223 393/STORES EQUIPMENT L 170 1,688,739 1,616,985 71,755
224 394/TOOLS,SHOP&GARAGE EQUIPMENT L171 5,388,701 5,159,734 228,967
225 395/LABORATORY EQUIPMENT L172 7,306,941 6,996,467 310,473
226 396/POWER OPERATED EQUIPMENT L173 6,817,185 6,527,521 289,664
227 397/COMMUNICATIONS EQUIPMENT L 174 36,291,244 34,749,222 1,542,022
228 398/MISCELLANEOUS EQUIPMENT L 175 4,486,993 4,296,340 190,653
229 TOTAL GENERAL PLANT 146,058,799 139,852,732 6,206,067
230
231 UNDER-/OVERALLOCATED SALVAGE L 97 - - -
232 TOTAL DEPR BEFORE FAS143/OTHER 2,187,308,379 2,093,725,841 93,582,539
233
234 FAS 143ADJ&/OR DISALLOWED COSTS L 97 3,001,094 2,877,713 123,381
235 TOTAL ACCUM PROVISION DEPRECIATION 2,190,309,473 2,096,603,554 93,705,920
236
237 AMORTIZATION OF OTHER UTILITY PLANT
238 INTANGIBLE PLANT L 97 20,202,730 19,372,156 830,574
239 HYDRAULIC PRODUCTION L101 27,392,039 26,309,527 1,082,512
240
241 TOTAL AMORT OF OTHER UTILITY PLANT 47,594,769 45,681,683 1,913,086
242
243 TOTAL ACCUM PROVISION FOR DEPR
244 &AMORTIZATION OF OTHER UTILITY PLANT 2,237,904,242 2,142,285,237 95,619,006
245
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 7 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
246"`TABLE 3-ADDITIONS&DELETIONS TO RATE BASE'"
247
248 NET ELECTRIC PLANT IN SERVICE 4,861,056,819 4,655,239,540 205,817,279
249 LESS:
250 252 CUSTOMER ADVANCES FOR CONSTRUCTION
251 POWER SUPPLY D10 - - -
252 OTHER DA252 32,170,424 32,110,363 60,062
253 TOTAL CUSTOMER ADV FOR CONSTRUCTION 32,170,424 32,110,363 60,062
254
255 ACCUMULATED DEFERRED INCOME TAXES
256 190/ACCUMULATED DEFERRED INCOME TAXES
257 CUSTOMER ADVANCES FOR CONSTRUCTION DA252 (3,854,109) (3,846,913) (7,196)
258 OTHER LABOR (13,759,745) (13,170,392) (589,353)
259 TOTAL ACCOUNT190 (17,613,854) (17,017,305) (596,549)
260 281/ACCELERATED AMORTIZATION P7o1P - - -
261 282/OTHER PROPERTY P1o1P 395,105,792 378,317,670 16,788,122
262 283/OTHER P1o1P 10,180,872 9,748,285 432,587
263 TOTAL ACCUM DEFERRED INCOME TAXES 387,672,810 371,048,649 16,624,160
264
265 NET ELECTRIC PLANT IN SERVICE 4,441,213,585 4,252,080,528 189,133,057
266 ADD:
267 WORKING CAPITAL
268 151/FUEL INVENTORY Eio 19,716,209 18,884,385 831,824
269 154/PLANT MATERIALS&SUPPLIES
270 PRODUCTION-GENERAL L 105 14,733,716 14,151,451 582,265
271 TRANSMISSION-GENERAL L143 32,918,344 31,615,444 1,302,900
272 DISTRIBUTION-GENERAL L 163 67,378,274 64,257,741 3,120,534
273 OTHER-UNCLASSIFIED L 179 4,737,661 4,536,490 201,171
274 TOTAL ACCOUNT154 119,767,996 114,561,126 5,206,870
275 165/PREPAID ITEMS
276 AD VALOREM TAXES L 707 - - -
277 OTHER PROD-RELATED PREPAYMENTS D10 - - -
278 INSURANCE L 105 - - -
279 PENSION-RELATED PREPAYMENTS L 1002 - - -
280 SOFTWARE CONTRACTS L 95 - - -
281 MISCELLANEOUS PREPAYMENTS P7o1P - - -
282 TOTAL ACCOUNT 165 - - -
283 WORKING CASH ALLOWANCE L 623 - - -
284
285 TOTAL WORKING CAPITAL 139,484,205 133,445,511 6,038,694
286
287 NET ELECTRIC PLANT IN SERVICE 4,580,697,790 4,385,526,039 195,171,751
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 8 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
3 DESCRIPTION SOURCE SYSTEM IPUC OPUC
288***TABLE 3-ADDITIONS&DELETIONS TO RATE BASE***
289
290 NET ELECTRIC PLANT IN SERVICE 4,580,697,790 4,385,526,039 195,171,751
291 ADD:
292 105/PLANT HELD FOR FUTURE USE
293 HYDRAULIC PRODUCTION L 101 - - -
294 TRANS LAND&LAND RIGHTS L III - - -
295 TRANS STRUCTURES&IMPROVEMENTS L 116 - - -
296 TRANS STATION EQUIPMENT L 121 - - -
297 DIST LAND&LAND RIGHTS L 149 - - -
298 DIST STRUCTURES&IMPROVEMENTS L 150 - - -
299 GEN LAND&LAND RIGHTS L 166 - - -
300 GEN STRUCTURES&IMPROVEMENTS L 167 - - -
301 TOTAL PLANT HELD FOR FUTURE USE - - -
302
303 ELECTRIC PLANT ACQUISITION ADJ:114/5 CIDA 628,247 628,247 -
304
305 DEFERRED PROGRAMS:
306 182/CONSERVATION PROGRAMS
307 IDAHO DEFERRED CONSERVATION PROGRAMS CIDA - - -
308 OREGON DEFERRED CONSERVATION PROGRAMS CODA - - -
309 TOTAL CONSERVATION PROGRAMS - - -
310 182/MISC.OTHER REGULATORY ASSETS
311 CUB FUND INTEREST-OPUC ORDER I5-399 CODA 59,702 - 59,702
312 AM.FALLS BOND REFINANCE D10 72,977 70,093 2,884
313 SFAS 87 CAPITALIZED PENSION-OPUC ORDER 10-064 CODA 7,096,835 - 7,096,835
314 CLOUD COMPUTING-IPUC ORDER 34707 CIDA 1,250,083 1,250,083 -
315 WILDFIRE MITIGATION-IPUC ORDER 35077 CIDA 24,651,249 24,651,249 -
316 SIEMENS LTP DEFERRED RATE BASE-IPUC ORDER 33420 CIDA 8,181,006 8,181,006 -
317 SIEMENS LTP RATE BASE-IPUC ORDER 33420 CIDA 12,207,705 12,207,705 -
318 SIEMENS LTP DEFERRED RATE BASE-OPUC ORDER 15-387 CODA 343,307 - 343,307
319 SIEMENS LTP RATE BASE-OPUC ORDER 15-387 CODA 471,789 - 471,789
320 TOTAL OTHER REGULATORY ASSETS 54,334,654 46,360,137 7,974,517
321 186/MISC.OTHER DEFERRED PROGRAMS EIO - - -
322 254/JIM BRIDGER PLANT END OF LIFE DEPR-OPUC ORD 12-296 CODA (2,753,872) - (2,753,872)
323 RECONNECT FEES-OPUC ADV 16-09 CODA (17,468) - (17,468)
324 TOTAL DEFERRED PROGRAMS 51,563,314 46,360,137 5,203,177
325
326 DEVELOPMENT OF IERCO RATE BASE
327 INVESTMENT IN IERCO EIO 18,375,460 17,600,202 775,258
328 PREPAID COAL ROYALTIES EIO 606,862 581,259 25,603
329 NOTES RECEIVABLE FROM SUBSIDIARY EIO 17,209,739 16,483,663 726,076
330 TOTAL SUBSIDIARY RATE BASE 36,192,061 34,665,124 1,526,937
331 Exhibit No. 6
332 TOTAL COMBINED RATE BASE 4,669,081,412 4,467,179,547 201,901,865
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 9 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
333***TABLE 4-OPERATING REVENUES
334 OPERATING REVENUES
335 FIRM ENERGY SALES
336 440-448/RETAIL RETREV 1,283,843,868 1,230,016,095 53,827,773
337 447/ FIRM SALES FOR RESALE E10 - - -
338447/SYSTEM OPPORTUNITY SALES E10 29,035,180 27,810,191 1,224,989
339 TOTAL SALES OF ELECTRICITY 1,312,879,048 1,257,826,285 55,052,763
340
341 OTHER OPERATING REVENUES
342 415/MERCHANDISING REVENUES D60 4,655,894 4,483,811 172,083
343
3"449/OATT TARIFF REFUND
345 NETWORK D11 - - -
346 POINT-TO-POINT D11 - - -
347 TOTALACCOUNT449 - - -
348
349 4511 MISCELLANEOUS SERVICE REVENUES DA451 5,220,513 5,158,858 61,655
350
351 454/RENTS FROM ELECTRIC PROPERTY
352 SUBSTATION EQUIPMENT L121 3,272,778 3,143,234 129,544
353 TRANSFORMER RENTALS 011 17,330 16,645 685
354 LINE RENTALS 011 - - -
355 COGENERATION L 490 1,896,418 1,816,408 80,010
356 DARK FIBER PROJECT CIDA 66,667 66,667 -
357 POLE ATTACHMENTS L 153 1,756,476 1,618,869 137,607
358 FACILITIES CHARGES DA454 10,841,971 10,407,743 434,228
359 OTHER RENTALS L101 1,246,139 1,196,893 49,246
360 WATER LEASE E10 66,960 64,135 2,825
361 TOTALACCOUNT454 19,164,738 18,330,593 834,145
362
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 10 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
363 4561 OTHER ELECTRIC REVENUES
364 TRANSMISSION-NETWORK SERVICES D11 10,740,800 10,316,332 424,468
365 TRANSMISSION-NETWORK SERVICES-DISTFACILITIES D60 765,132 736,853 28,279
366 TRANSMISSION-POINT-TO-POINT D71 49,148,205 47,205,906 1,942,299
367 ALTERNATE TRANSMISSION SERV.CHG. L 144 - - -
368 PHOTOVOLTAIC STATION SERVICE L 163 - - -
369 DSM RIDER FUNDS DARIDER - - -
370 STANDBY SERVICE CHARGE CIDA 741,858 741,858 -
371 SIERRA PACIFIC USAGE CHARGE Eio - - -
372 BPA-OTHER REVENUE Dio - - -
373 ANTELOPE L 515 - - -
374 MISCELLANEOUS PTD 8,346 7,991 355
375 TOTALACCOUNT456 61,404,340 59,008,940 2,395,401
376
377 TOTAL OTHER OPERATING REVENUES 90,445,486 86,982,202 3,463,284
378
379 TOTAL OPERATING REVENUES 1,403,324,534 1,344,808,487 58,516,046
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 11 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
3 DESCRIPTION SOURCE SYSTEM IPUC OPUC
380***TABLE 5-OPERATION&MAINTENANCE EXPENSES
381
382 STEAM POWER GENERATION
383 OPERATION
384 500/SUPERVISION&ENGINEERING DIO (147,309) (141,488) (5,822)
385 501/FUEL E10 65,523,000 62,758,595 2,764,405
386
387 502/STEAM EXPENSES
388 LABOR DIO - - -
389 OTHER E10 (2,000) (1,916) (84)
390 TOTAL ACCOUNT502 (2,000) (1,916) (84)
391 505/ELECTRIC EXPENSES
392 LABOR DIO - - -
393 OTHER E10 (0) (0) (0)
394 TOTAL ACCOUNT 505 (0) (0) (0)
395 506/MISCELLANEOUS EXPENSES DIO (59) (57) (2)
396 507/RENTS L 100 - - -
397 TOTAL STEAM OPERATION EXPENSES 65,373,631 62,615,135 2,758,496
398
399 MAINTENANCE
400 510/SUPERVISION&ENGINEERING DIO (282,132) (270,982) (11,150)
401 511 /STRUCTURES DIO (0) (0) (0)
402 512/BOILER PLANT
403 LABOR DIO - - -
404 OTHER E10 0 0 0
405 TOTAL ACCOUNT 512 0 0 0
406 513/ELECTRIC PLANT
407 LABOR DIO - - -
408 OTHER E10 - - -
409 TOTAL ACCOUNT 513 - - -
410 514/MISCELLANEOUS STEAM PLANT D70 0 0 0
411 TOTAL STEAM MAINTENANCE EXPENSES (282,131) (270,982) (11,150)
412
413 TOTAL STEAM GENERATION EXPENSES 65,091,500 62,344,153 2,747,347
414
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 12 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
415***TABLE 5-OPERATION&MAINTENANCE EXPENSES'
416
417 HYDRAULIC POWER GENERATION
418 535/SUPERVISION&ENGINEERING L 879 5,490,907 5,272,917 217,990
419 536/WATER FOR POWER
420 WATER LEASE D10 - - -
421 OTHER DIO 3,312,731 3,181,814 130,917
422 TOTAL ACCOUNT 536 3,312,731 3,181,814 130,917
423
424 537/HYDRAULIC EXPENSES DIO 19,552,157 18,779,471 772,686
425 538/ELECTRIC EXPENSES
426 LABOR DIO 1,915,562 1,839,861 75,702
427 OTHER E10 513,003 491,360 21,644
428 TOTAL ACCOUNT 538 2,428,565 2,331,220 97,345
429
430 539/MISCELLANEOUS EXPENSES DIO 6,049,766 5,810,684 239,082
431 540/RENTS DIO 311,854 299,530 12,324
432
433 TOTAL HYDRAULIC OPERATION EXPENSES 37,145,981 35,675,637 1,470,344
434
435 MAINTENANCE
436 541/SUPERVISION&ENGINEERING L 885 298,844 287,034 11,810
437 542/STRUCTURES DIO 937,125 900,090 37,034
438 543/RESERVOIRS,DAMS&WATERWAYS D70 2,361,075 2,267,768 93,308
439 544/ELECTRIC PLANT
440 LABOR DIO 1,725,010 1,656,839 68,171
441 OTHER E10 697,230 667,814 29,416
442 TOTAL ACCOUNT544 2,422,240 2,324,653 97,587
443
444 545/MISCELLANEOUS HYDRAULIC PLANT L 101 3,701,651 3,555,365 146,286
445
446 TOTAL HYDRAULIC MAINTENANCE EXPENSES 9,720,935 9,334,909 386,026
447
448 TOTAL HYDRAULIC GENERATION EXPENSES 46,866,916 45,010,546 1,856,370
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 13 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
449"`TABLE 5-OPERATION&MAINTENANCE EXPENSES
450 OTHER POWER GENERATION
451 OPERATION
452 546/SUPERVISION&ENGINEERING L 892 759,844 729,816 30,028
453 547/FUEL
454 SALMON DIESEL E10 16,517 15,820 697
455 OTHER E10 119,653,675 114,605,506 5,048,169
456 TOTAL ACCOUNT547 119,670,192 114,621,327 5,048,866
457
458 548/GENERATING EXPENSES
459 LABOR DIO 470,542 451,946 18,595
460 OTHER E10 5,285,971 5,062,957 223,014
461 TOTAL ACCOUNT548 5,756,513 5,514,903 241,610
462
463549/MISCELLANEOUS EXPENSES DIO 933,018 896,145 36,872
464 550/RENTS DIO - - -
465
466 TOTAL OTHER POWER OPER EXPENSES 127,119,567 121,762,191 5,357,376
467
468 MAINTENANCE
469 551/SUPERVISION&ENGINEERING L 898 - - -
470 552/STRUCTURES DIO 148,767 142,887 5,879
471 553/GENERATING&ELECTRIC PLANT
472 LABOR D10 71,469 68,645 2,824
473 OTHER E10 (91,258) (87,407) (3,850)
474 TOTAL ACCOUNT 553 (19,788) (18,763) (1,026)
475
476 554/MISCELLANEOUS EXPENSES L 103 5,257,613 5,049,837 207,777
477 TOTAL OTHER POWER MAINT EXPENSES 5,386,592 5,173,962 212,630
478
479 TOTAL OTHER POWER GENERATION EXP 132,506,159 126,936,153 5,570,006
480
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 14 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
481 OTHER POWER SUPPLY EXPENSE
482 555.0/PURCHASED POWER
483 PURCHASED POWER-TRANS LOSSES E10 1,096,106 1,049,861 46,245
484 DEMAND RESPONSE INCENTIVES CIDA 10,240,003 10,240,003 -
485 OTHER PURCHASED POWER E10 99,465,021 95,268,608 4,196,413
486 TOTAL ACCOUNT555.0 110,801,130 106,558,473 4,242,657
487 555.1/COGENERATION&SMALL POWER PROD
488 CAPACITY RELATED D70 - - -
489 ENERGY RELATED E10 214,448,755 205,401,197 9,047,558
490 TOTAL COGEN&SMALL POWER PROD 214,448,755 205,401,197 9,047,558
491
492 TOTAL ACCOUNT555 325,249,885 311,959,670 13,290,215
493
494 556/LOAD CONTROL&DISPATCHING EXPENSES D10 - - -
495 557/OTHER EXPENSES
496 IDAHO POWER COST-RELATED EXPENSES CIDA 11,089,392 11,089,392 -
497 OREGON POWER COST-RELATED EXPENSES CODA 2,742,786 - 2,742,786
498 OTHER D10 2,238,194 2,149,742 88,452
499 TOTAL ACCOUNT 557 16,070,371 13,239,134 2,831,237
500
501 TOTAL OTHER POWER SUPPLY EXPENSES 341,320,256 325,198,804 16,121,452
502
503 TOTAL PRODUCTION EXPENSES 585,784,831 559,489,656 26,295,175
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 15 of 37

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
504"**TABLE 5-OPERATION&MAINTENANCE EXPENSES
505
506 TRANSMISSION EXPENSES
507
508 OPERATION
509 560/SUPERVISION&ENGINEERING L 144 3,095,555 2,973,034 122,521
510 561/LOAD DISPATCHING D12 5,982,841 5,746,404 236,437
511 562/STATION EXPENSES L121 2,827,336 2,715,424 111,912
512 563/OVERHEAD LINE EXPENSES L127+132+137 1,307,218 1,255,466 51,752
513 565/TRANSMISSION OF ELECTRICITY BY OTHERS EIO 10,263,139 9,830,139 433,000
514 566/MISCELLANEOUS EXPENSES L 144 - - -
515 567/RENTS L144 5,051,708 4,851,762 199,945
516
517 TOTAL TRANSMISSION OPERATION 28,527,797 27,372,229 1,155,568
518
519 MAINTENANCE
520 568/SUPERVISION&ENGINEERING L144 381,737 366,628 15,109
521 569/STRUCTURES L116 1,905,784 1,830,458 75,326
522 570/STATION EQUIPMENT L 121 3,687,126 3,541,182 145,944
523 571/OVERHEAD LINES L 127+132+137 1,498,786 1,439,450 59,336
524 573/MISCELLANEOUS PLANT L 143 (78) (75) (3)
525 575/OPER TRANS MKT ADMIN-EIM L144 703,023 675,198 27,825
526
527 TOTAL TRANSMISSION MAINTENANCE 8,176,378 7,852,840 323,537
528
529 TOTAL TRANSMISSION EXPENSES 36,704,175 35,225,070 1,479,105
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 16 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
3 DESCRIPTION SOURCE SYSTEM IPUC OPUC
530***TABLE 5-OPERATION&MAINTENANCE EXPENSES*'
531
532 DISTRIBUTION EXPENSES
533
534 OPERATION
535 580/SUPERVISION&ENGINEERING L163 4,883,505 4,657,332 226,173
536 581/LOAD DISPATCHING D60 6,701,081 6,453,408 247,673
537 582/STATION EXPENSES L151 1,905,068 1,827,493 77,575
538 583/OVERHEAD LINE EXPENSES L 153+154 5,856,482 5,439,541 416,941
539 584/UNDERGROUND LINE EXPENSES L 155+156 5,744,802 5,657,373 87,429
540 585/STREET LIGHTING&SIGNAL SYSTEMS L 161 (17,461) (16,592) (869)
541586/METER EXPENSES L159 7,459,560 7,231,155 228,405
542 587/CUSTOMER INSTALLATIONS EXPENSE L160 1,444,874 1,350,153 94,721
543 588/MISCELLANEOUS EXPENSES L 163 4,637,720 4,422,930 214,790
544 589/RENTS L 163 639,456 609,840 29,616
545 TOTAL DISTRIBUTION OPERATION 39,255,088 37,632,635 1,622,453
546
547 MAINTENANCE
548 590/SUPERVISION&ENGINEERING L 163 5,684 5,421 263
549 591/STRUCTURES L 150 - - -
550 592/STATION EQUIPMENT L 151 5,931,659 5,690,120 241,539
551 593/OVERHEAD LINES L153+154 34,078,337 31,652,194 2,426,143
552 594/UNDERGROUND LINES L155+156 725,137 714,102 11,036
553595/LINE TRANSFORMERS L157 65,073 61,504 3,568
554 596/STREET LIGHTING&SIGNAL SYSTEMS L 161 149,941 142,478 7,463
555 597/METERS L 159 1,130,731 1,096,109 34,622
556 598/MISCELLANEOUS PLANT L 163 185,410 176,823 8,587
557 TOTAL DISTRIBUTION MAINTENANCE 42,271,971 39,538,751 2,733,220
558
559 TOTAL DISTRIBUTION EXPENSES 81,527,059 77,171,386 4,355,674
560
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 17 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
561 CUSTOMER ACCOUNTING EXPENSES
562 901/SUPERVISION L 959 1,020,032 975,561 44,472
563902/METER READING CW902 2,160,189 1,868,578 291,611
564903/CUSTOMER RECORDS&COLLECTIONS CW903 17,401,772 16,832,566 569,206
565904/UNCOLLECTIBLE ACCOUNTS Cw904 3,830,484 3,458,798 371,686
566 905/MISC EXPENSES L 563+564+565 (358) (339) (19)
567 TOTAL CUSTOMER ACCOUNTING EXPENSES 24,412,119 23,135,163 1,276,955
568 CUSTOMER SERVICES&INFORMATION EXPENSES
569 907/SUPERVISION L 966 1,076,445 1,034,603 41,841
570 908/CUSTOMER ASSISTANCE
571 SYSTEM CONSERVATION E100 312,791 299,594 13,197
572 OTHER DA908 8,884,565 8,540,260 344,305
573 TOTAL ACCOUNT908 9,197,356 8,839,855 357,501
574 909/INFORMATION&INSTRUCTIONAL DA909 282,865 273,844 9,021
575 910/MISCELLANEOUS EXPENSES L 573+574 889,938 855,532 34,407
576 TOTAL CUST SERV&INFORMATN EXPENSES 11,446,605 11,003,834 442,770
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 18 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
577***TABLE 5-OPERATION&MAINTENANCE EXPENSES
578 SALES EXPENSES
579 912/DEMO&SELLING EXPENSES E10 - - -
580 TOTAL ACCOUNT 924 - - -
581
582 ADMINISTRATIVE&GENERAL EXPENSES
583 920/ADMINISTRATIVE&GENERAL SALARIES LABOR 92,786,842 88,812,625 3,974,217
584 921/OFFICE SUPPLIES LABOR 16,584,609 15,874,262 710,347
585 922/ADMIN&GENERAL EXPENSES TRANSFERRED-CR LABOR (51,999,902) (49,772,659) (2,227,243)
586 923/OUTSIDE SERVICES LABOR 10,180,054 9,744,026 436,029
587 924/PROPERTY INSURANCE
588 PRODUCTION-STEAM D10 465,139 446,757 18,382
589 ALL RISK&MISCELLANEOUS P710P 2,935,891 2,817,492 118,398
590 TOTAL ACCOUNT 924 3,401,030 3,264,249 136,780
591
592925/INJURIES&DAMAGES LABOR 12,296,837 11,770,143 526,694
593 926/EMPLOYEE PENSIONS&BENEFITS LABOR 51,951,225 49,726,067 2,225,158
594 EMPLOYEE PENSIONS&BENEFITS-OREGON CODA 514,677 - 514,677
595 EMPLOYEE PENSIONS&BENEFITS-IDAHO CIDA 35,182,378 35,182,378 -
596 EMPLOYEE PENSIONS&BENEFITS-FERC D11 - - -
597 927/FRANCHISE REQUIREMENTS CIDA - - -
598 928/REGULATORY COMMISSION EXPENSES
599 FERC ADMIN ASSESS&SECURITIES
600 CAPACITY RELATED D10 3,043,871 2,923,580 120,291
601 ENERGY RELATED E10 1,044,908 1,000,824 44,084
602 FERC RATE CASE D11 - - -
603 FERC ORDER472 E99 1,108,266 1,061,278 46,988
604 FERC OTHER D11 283,013 271,828 11,184
605 FERC-OREGON HYDRO FEE D11 271,717 260,979 10,738
606 SEC EXPENSES L 179 - - -
607 IDAHO PUC-RATE CASE CIDA - - -
608 -OTHER CIDA 48,457 48,457
609 OREGON PUC-RATE CASE CODA - - -
610 -OTHER CODA 329,733 - 329,733
611 TOTAL ACCOUNT 928 6,129,965 5,566,945 563,019
612
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 19 of 37

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
613 929/DUPLICATE CHARGES LABOR - - -
614 930.11 GENERAL ADVERTISING LABOR - - -
615 930.21 MISCELLANEOUS EXPENSES LABOR 3,387,272 3,242,190 145,083
616 931 I RENTS L 177 - - -
617 TOTAL ADM&GEN OPERATION 180,414,987 173,410,225 7,004,761
618
619 9351 GENERAL PLANT MAINTENANCE L 177 8,280,911 7,929,054 351,858
620 TOTAL ADMIN&GENERAL EXPENSES 188,695,898 181,339,279 7,356,619
621
622 4161 MERCHANDISING EXPENSE D60 5,870,784 5,653,799 216,985
623 TOTAL OPER&MAINT EXPENSES 934,441,471 893,018,187 41,423,284
624
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 20 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
625***TABLE 6-DEPRECIATION&AMORTIZATION EXPENSE
626
627 DEPRECIATION EXPENSE
628 310-316 1 STEAM PRODUCTION L 100 10,246,819 9,841,873 404,946
629 330-336/HYDRAULIC PRODUCTION L101 29,099,413 27,949,427 1,149,986
630 340-346/OTHER PRODUCTION-LANGLEY L102 12,559,576 12,063,232 496,345
631 340-3461 OTHER PRODUCTION-DANSKIN/BENNETT MTN L 103 6,483,109 6,226,902 256,207
632 TOTAL PRODUCTION PLANT 58,388,917 56,081,433 2,307,485
633
634 TRANSMISSION PLANT
635 350/LAND&LAND RIGHTS L 111 477,848 458,964 18,884
636 352/STRUCTURES&IMPROVEMENTS L116 2,161,701 2,076,260 85,441
637 353/STATION EQUIPMENT L 121 11,225,973 10,781,625 444,348
638 354/TOWERS&FIXTURES L127 2,950,779 2,834,166 116,612
639 355/POLES&FIXTURES L 132 7,018,607 6,740,397 278,210
640 3561 OVERHEAD CONDUCTORS&DEVICES L 137 4,276,282 4,106,929 169,353
641 359/ROADS&TRAILS L 142 2,796 2,685 110
642 TOTAL TRANSMISSION PLANT 28,113,987 27,001,027 1,112,959
643
644 DISTRIBUTION PLANT
645360/LAND&LAND RIGHTS L149 27,253 26,097 1,156
646 361/STRUCTURES&IMPROVEMENTS L150 1,582,324 1,513,424 68,900
647 362/STATION EQUIPMENT L 151 6,685,998 6,413,742 272,256
648 3631 BATTERY STORAGE L 152 15,080,023 14,484,072 595,951
649 364/POLES,TOWERS&FIXTURES L 153 6,807,143 6,273,853 533,290
650 3651 OVERHEAD CONDUCTORS&DEVICES L 154 3,769,855 3,558,634 211,221
651366/UNDERGROUND CONDUIT L155 1,424,328 1,401,450 22,877
652 367/UNDERGROUND CONDUCTORS&DEVICES L 156 8,603,139 8,473,384 129,755
653368/LINE TRANSFORMERS L157 15,695,524 14,834,810 860,713
654 369/SERVICES L 158 1,249,138 1,197,693 51,445
655 370/METERS L 159 6,169,537 5,980,631 188,906
656 3711 INSTALLATIONS ON CUSTOMER PREMISES L 160 291,294 272,198 19,096
657 373 1 STREET LIGHTING SYSTEMS L161 251,969 239,428 12,541
658 TOTAL DISTRIBUTION PLANT 67,637,523 64,669,417 2,968,106
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 21 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
659***TABLE 6-DEPRECIATION&AMORTIZATION EXPENSE***
660
661 GENERALPLANT
662 389/LAND&LAND RIGHTS L 166 - - -
663390/STRUCTURES&IMPROVEMENTS L167 4,140,032 3,964,122 175,911
664 391/OFFICE FURNITURE&EQUIPMENT L 168 7,279,581 6,970,270 309,311
665 392/TRANSPORTATION EQUIPMENT L 169 6,037 5,781 257
666 393/STORES EQUIPMENT L 170 360,037 344,739 15,298
667 394/TOOLS,SHOP&GARAGE EQUIPMENT L 171 863,151 826,476 36,675
668 395/LABORATORY EQUIPMENT L172 935,849 896,085 39,764
669 396/POWER OPERATED EQUIPMENT L 173 - - -
670 397/COMMUNICATIONS EQUIPMENT L 174 5,859,096 5,610,142 248,954
671 3981 MISCELLANEOUS EQUIPMENT L 175 746,357 714,644 31,713
672 TOTAL GENERAL PLANT 20,190,141 19,332,258 857,883
673
674 403/BOARDMAN ARO DEPRECIATION EXP DAARO - - -
675 DEPR EXP BEFORE DISALLOWED COSTS 174,330,569 167,084,135 7,246,433
676
677 DEPRECIATION ON DISALLOWED COSTS L 675 (296,299) (283,983) (12,316)
678 TOTAL DEPRECIATION EXPENSE 174,034,269 166,800,152 7,234,117
679
680 AMORTIZATION EXPENSE
681 INTANGIBLE PLANT L 97 6,975,364 6,688,593 286,771
682 HYDRAULIC PRODUCTION L101 1,959,025 1,881,606 77,419
683 ADJUSTMENTS,GAINS&LOSSES L 97 15,018 14,424 593
684 TOTAL AMORTIZATION EXPENSE 8,949,407 8,584,623 364,784
685
686 TOTAL DEPRECIATION&AMORTIZATION EXP 182,983,676 175,384,775 7,598,900
687
688 411.093/4/ARO ACCRETION EXPENSE DAACCRETION 12,995 12,485 509
689
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 22 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOCI TOTAL IDAHO OREGON
3 DESCRIPTION SOURCE SYSTEM IPUC OPUC
690***TABLE 7-TAXES OTHER THAN INCOME TAXES
691
692 TAXES OTHER THAN INCOME
693 FEDERALTAXES
694 FICA LABOR - - -
695 FUTA LABOR - - -
696 LESS PAYROLL DEDUCTION LABOR - - -
697
698 STATE TAXES
699 AD VALOREM TAXES
700 JIM BRIDGER STATION L100 1,310,444 1,258,656 51,788
701 VALMY L 100 279,802 268,744 11,058
702 BOARDMAN L 100 - - -
703 OTHER-PRODUCTION PLANT L105 5,023,123 4,824,613 198,510
704 OTHER-TRANSMISSION PLANT L 143 5,094,471 4,892,833 201,638
705 OTHER-DISTRIBUTION PLANT L 163 6,775,452 6,461,656 313,796
706 OTHER-GENERAL PLANT L177 1,071,005 1,025,498 45,507
707 SUB-TOTAL 19,554,298 18,732,002 822,296
708
709 LICENSES-HYDRO PROJECTS L 101 4,376 4,203 173
710
711 REGULATORY COMMISSION FEES
712 STATE OF IDAHO CIDA 2,837,473 2,837,473 -
713 STATE OF OREGON CODA 260,575 - 260,575
714
715 FRANCHISE TAXES
716 STATE OF OREGON CODA 944,305 - 944,305
717
718 OTHER STATE TAXES
719 UNEMPLOYMENTTAXES LABOR - - -
720 HYDRO GENERATION KWH TAX E10 1,659,564 1,589,547 70,017
721 IRRIGATION-PIC E10 293,571 281,185 12,386
722
723 CANADA GST TAXES E10 - - -
724
725 TOTAL TAXES OTHER THAN INCOME 25,554,161 23,444,410 2,109,751
726
727
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 23 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
728***TABLE 8-REGULATORY DEBITS/CREDITS
729 REGULATORY DEBITS/CREDITS
730 STATE OF IDAHO CioA 5,339,621 5,339,621 -
731 STATE OF OREGON CODA 317,709 - 317,709
732
733 TOTAL REGULATORY DEBITS/CREDITS 5,657,329 5,339,621 317,709
734
735
736"**TABLE 9-INCOME TAXES*"
737
738 410/411 NET PROVISION FOR DEFERRED INCOME TAXES
739 ACCOUNT#282-RELATED PioiP (12,766,841) (12,224,375) (542,466)
740 ACCOUNTS#1908#283-RELATED L769 (2,657,192) (2,583,469) (73,723)
741 TOTAL NET PROVISION FOR DEFERRED INCOME TAXES (15,424,032) (14,807,844) (616,189)
742
743411.4-INVESTMENT TAX CREDIT ADJUSTMENT PioiP 124,171,136 118,895,080 5,276,056
744
745 SUMMARY OF INCOME TAXES
746
747 TOTAL FEDERAL INCOME TAX L786 (101,137,048) (97,803,208) (3,333,840)
748
749 STATE INCOME TAX
750 STATE OF IDAHO L 852 (10,827,212) (10,427,509) (399,703)
751 STATE OF OREGON L 827 402,339 402,339 -
752 OTHER STATES L868 (129,664) (121,189) (8,475)
753 TOTAL STATE INCOME TAXES (10,554,538) (10,146,359) (408,178)
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 24 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
754***TABLE 10-CALCULATION OF FEDERAL INCOME TAX***
755
756 OPERATING REVENUES 1,403,324,534 1,344,808,487 58,516,046
757
758 OPERATING EXPENSES
759 OPERATION&MAINTENANCE 934,441,471 893,018,187 41,423,284
760 DEPRECIATION EXPENSE 174,034,269 166,800,152 7,234,117
761 AMORTIZATION OF LIMITED TERM PLANT 8,949,407 8,584,623 364,784
762 ACCRETION EXPENSE 12,995 12,485 509
763 TAXES OTHER THAN INCOME 25,554,161 23,444,410 2,109,751
764 REGULATORY DEBITSICREDITS 5,657,329 5,339,621 317,709
765 TOTAL OPERATING EXPENSES 1,148,649,632 1,097,199,478 51,450,153
766
767 BOOK-TAX ADJUSTMENT L 765 - - -
768
769 INCOME BEFORE TAX ADJUSTMENTS 254,674,902 247,609,009 7,065,893
770
771 INCOME STATEMENT ADJUSTMENTS
772 LONG TERM DEBT INTEREST EXPENSE L24 136,594,388 130,687,731 5,906,657
773 OTHER INTEREST EXPENSE L24 19,913,023 19,051,938 861,085
774 TOTAL INTEREST CHARGES 156,507,411 149,739,669 6,767,742
775
776 NET OPERATING INCOME BEFORE STATE INCOME TAXES 98,167,491 97,869,340 298,151
777
778 TOTAL STATE INCOME TAXES(ALLOWED) (6,670,047) (6,134,210) (535,836)
779
780 NET FEDERAL INCOME AFTER STATE INCOME TAXES 104,837,537 104,003,550 833,987
781
782 FEDERAL TAX AT21PERCENT 22,015,883 21,840,745 175,137
783 OTHER CURRENT TAX ADJUSTMENTS L782 (42,231,900) (41,895,943) (335,957)
784 PRIOR YEARS'TAX ADJUSTMENT L782 (9,810,034) (9,731,994) (78,039)
785
786 TOTAL FEDERAL INCOME TAX BEFORE OTHER ADJUSTMENTS (30,026,051) (29,787,192) (238,859)
787
788 OTHER TAX ADJUSTMENTS
789 ALLOWANCE FOR AFUDC P1o1P - - -
790 FEDERAL INCOME TAX ADJUSTMENTS-PLANT P1o1P (38,661,626) (37,018,886) (1,642,740)
791 FEDERAL INCOME TAX ADJUSTMENTS-OTHER L769 23,723,545 23,065,341 658,204
792 SUM OF OTHER ADJUSTMENTS (14,938,081) (13,953,545) (984,536)
793 FEDERAL TAX ON OTHER TAX ADJ AT 21 PERCENT (3,136,997) (2,930,244) (206,753)
794 FEDERAL GENERAL BUSINESS CREDITS P1o1P 67,974,000 65,085,772 2,888,228
795
796 TOTAL FEDERAL INCOME TAX (101,137,048) (97,803,208) (3,333,840)
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 25 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
8 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
797"*TABLE 11-OREGON STATE INCOME TAXES"*"
798
799 NET OPERATING INCOME BEFORE TAXES-OREGON L776 98,167,491 97,869,340 298,151
800
801 ALLOWANCE FOR AFUDC P1o1P - - -
802
803 STATE INCOME TAX ADJUSTMENTS-PLANT P101P (38,661,626) (37,018,886) (1,642,740)
804 STATE INCOME TAX ADJUSTMENTS-OTHER L769 23,723,545 23,065,341 658,204
805 TOTAL STATE INCOME TAX ADJUSTMENTS (14,938,081) (13,953,545) (984,536)
806 ADD: MFG DEDUCTION NOT ALLOWED L 769 - - -
807
808 TOTAL STATE INCOME TAX ADJUSTMENTS-OREGON (14,938,081) (13,953,545) (984,536)
809
810 INCOME SUBJECT TO OREGON TAX 83,229,410 83,915,795 (686,385)
811
812 IERCO TAXABLE INCOME E10 13,361,504 12,797,784 563,720
813 BONUS DEPRECIATION ADJUSTMENT P1o1P (6,823,240) (6,533,319) (289,921)
814 FEDERAL NOL L 750 - - -
815 TOTAL STATE TAXABLE INCOME-OREGON 89,767,674 90,180,260 (412,586)
816 APPORTIONMENT FACTOR(0.045454550) 4,099,103 4,099,103 -
817 POST APPORTIONMENT M ITEMS L 757 - - -
818 TOTAL TAXABLE INCOME-OREGON 4,099,103 4,099,103 -
819
820 OREGON TAX AT 6.6 PERCENT 270,541 270,541 -
821 LESS:INVESTMENT TAX CREDIT P701P - - -
822
823 STATE INCOME TAX ALLOWED-OREGON 270,541 270,541 -
824 ADD: FIN 48 ADJUSTMENT L 819 282,224 282,224 -
825 PRIOR YEARS'TAX ADJUSTMENT L820 (150,426) (150,426) -
826
827 STATE INCOME TAX PAID-OREGON 402,339 402,339 -
828
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 26 of 37

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
829-TABLE*TABLE 12-IDAHO STATE INCOME TAXES***
830
831 NET OPERATING INCOME BEFORE TAXES-IDAHO L776 98,167,491 97,869,340 298,151
832
833 ALLOWANCE FOR AFUDC P101P - - -
834
835 STATE INCOME TAX ADJUSTMENTS-PLANT P101P (38,661,626) (37,018,886) (1,642,740)
836 STATE INCOME TAX ADJUSTMENTS-OTHER L769 23,723,545 23,065,341 658,204
837 STATE INCOME TAX ADJUSTMENTS (14,938,081) (13,953,545) (984,536)
838
839 INCOME SUBJECT TO IDAHO TAX 83,229,410 83,915,795 (686,385)
840
841 IERCO TAXABLE INCOME E10 13,361,504 12,797,784 563,720
842 BONUS DEPRECIATION ADJUSTMENT P701P (42,661,135) (40,848,455) (1,812,680)
843 FEDERAL NOL L 750 - - -
844 TOTAL STATE TAXABLE INCOME-IDAHO 53,929,779 55,865,124 (1,935,345)
845
846 IDAHO TAX AT 5.6 PERCENT 3,020,068 3,128,447 (108,379)
847 LESS:INVESTMENT TAX CREDIT P701P 10,057,246 9,629,912 427,334
848
849 STATE INCOME TAX ALLOWED-IDAHO (7,037,178) (6,501,465) (535,714)
850 ADD: FIN 48 ADJUSTMENT L 845 - - -
851 PRIOR YEARS'TAX ADJUSTMENT L846 (3,790,034) (3,926,044) 136,011
852 STATE INCOME TAX PAID-IDAHO (10,827,212) (10,427,509) (399,703)
853
854
855 OTHER STATE INCOME TAX
856 INCOME SUBJECT TO TAX 83,229,410 83,915,795 (686,385)
857
858 IERCO TAXABLE INCOME E10 13,361,504 12,797,784 563,720
859 BONUS DEPRECIATION ADJUSTMENT P701P - - -
860 FEDERAL NOL L 750 - - -
861 TOTAL TAXABLE INCOME BEFORE APPORTIONMENT-OTHER STATES 96,590,914 96,713,579 (122,665)
862 POST APPORTIONMENT M ITEMS L 757 - - -
863 TOTAL TAXABLE INCOME-OTHER STATES 96,590,914 96,713,579 (122,665)
864
865 OTHER TAX AT0.1PERCENT 96,591 96,714 (123)
866 ADD: FIN 48 ADJUSTMENT L 852 - - -
867 PRIOR YEARS'TAX ADJUSTMENT L852 (226,255) (217,903) (8,353)
868 OTHER STATES'INCOME TAX PAID (129,664) (121,189) (8,475)
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 27 of 37

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
869***TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
870 STEAM POWER GENERATION
871 500-513/TOTAL STEAM GENERATION Dio 442,341 424,860 17,481
872 HYDRAULIC POWER GENERATION
873 535/SUPERVISION&ENGINEERING L879 4,198,454 4,031,774 166,680
874536/WATER FOR POWER E10 870,626 833,895 36,732
875 537/HYDRAULIC EXPENSES D70 6,581,987 6,321,872 260,115
876 538/ELECTRIC EXPENSES Dio 1,659,356 1,593,780 65,576
877 539/MISCELLANEOUS EXPENSES Dio 3,733,853 3,586,294 147,559
878 540/RENTS Dio - - -
879 TOTAL HYDRAULIC OPERATION EXPENSES 17,044,277 16,367,615 676,662
880 541/SUPERVISION&ENGINEERING L 885 167,910 161,275 6,636
881542/STRUCTURES Dio 567,222 544,806 22,416
882543/RESERVOIRS,DAMS&WATERWAYS D70 301,175 289,273 11,902
883544/ELECTRIC PLANT Dio 1,724,170 1,656,032 68,138
884545/MISCELLANEOUS HYDRAULIC PLANT Dio 2,266,086 2,176,532 89,554
885 TOTAL HYDRAULIC MAINTENANCE EXPENSES 5,026,564 4,827,918 198,646
886 TOTAL HYDRAULIC GENERATION EXPENSES 22,070,840 21,195,533 875,307
887 OTHER POWER GENERATION
888 546/SUPERVISION&ENGINEERING L 892 582,577 559,554 23,023
889 548/GENERATING EXPENSES Dio - - -
890549/MISCELLANEOUS EXPENSES Dio 3,495,474 3,357,336 138,138
891550/RENTS Dio 496,069 476,464 19,604
892 TOTAL OTHER POWER OPER EXPENSES 4,574,120 4,393,354 180,766
893
894 551/SUPERVISION&ENGINEERING L 898 - - -
895 552/STRUCTURES D70 47,812 45,922 1,889
896553/GENERATING&ELECTRIC PLANT Dio 65,753 63,154 2,598
897 554/MISCELLANEOUS EXPENSES Dio 523,281 502,601 20,680
898 TOTAL OTHER POWER MAINT EXPENSES 636,845 611,678 25,168
899 TOTAL OTHER POWER GENERATION EXP 5,210,965 5,005,032 205,933
900 555/PURCHASE POWER E10 - - -
901 556/LOAD CONTROL&DISPATCHING EXPENSES D70 - - -
902 Dio 4,863,381 4,671,184 192,197
903 TOTAL OTHER POWER SUPPLY EXPENSES 4,863,381 4,671,184 192,197
904
905 TOTAL PRODUCTION EXPENSES 32,587,528 31,296,609 1,290,919
906
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 28 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
907***TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
908
909 TRANSMISSION EXPENSES
910 560/SUPERVISION&ENGINEERING L144 2,317,807 2,226,069 91,738
911 561/LOAD DISPATCHING D12 3,373,689 3,240,363 133,326
912 562/STATION EXPENSES L121 1,900,727 1,825,492 75,235
913 563/OVERHEAD LINE EXPENSES L127+132+137 483,392 464,255 19,137
914 565/TRANSMISSION OF ELECTRICITY BY OTHERS E10 - - -
915 566/MISCELLANEOUS EXPENSES L 529 - - -
916 567/RENTS L 144 - - -
917 TOTAL TRANSMISSION OPERATION 8,075,615 7,756,179 319,436
918 568/SUPERVISION&ENGINEERING L 144 139,203 133,694 5,510
919 569/STRUCTURES L 116 1,426,838 1,370,442 56,396
920 570/STATION EQUIPMENT L 121 2,616,011 2,512,464 103,547
921 571/OVERHEAD LINES L 127+132+137 972,477 933,977 38,500
922 575/OPER TRANS MKT ADMIN-EIM L144 1,155 1,109 46
923 TOTAL TRANSMISSION MAINTENANCE 5,155,684 4,951,686 203,998
924 TOTAL TRANSMISSION EXPENSES 13,231,299 12,707,865 523,434
925
926 DISTRIBUTION EXPENESES
927 580/SUPERVISION&ENGINEERING L 163 3,237,656 3,087,708 149,948
928 581/LOAD DISPATCHING D60 4,740,713 4,565,495 175,218
929 582/STATION EXPENSES L151 1,048,893 1,006,182 42,711
930 583/OVERHEAD LINE EXPENSES L153+154 3,701,154 3,437,657 263,497
931584/UNDERGROUND LINE EXPENSES L155+156 1,636,360 1,611,456 24,903
932 585/STREET LIGHTING&SIGNAL SYSTEMS L 161 1,916 1,821 95
933586/METER EXPENSES L159 4,739,824 4,594,694 145,129
934 587/CUSTOMER INSTALLATIONS EXPENSE L160 857,913 801,672 56,242
935 588/MISCELLANEOUS EXPENSES L 559 2,979,865 2,820,662 159,203
936 589/RENTS L 163 - - -
937 TOTAL DISTRIBUTION OPERATION 22,944,293 21,927,348 1,016,946
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 29 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
938***TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR"*'
939
940
941 590/SUPERVISION&ENGINEERING L163 7,755 7,396 359
942 591/STRUCTURES L 150 - - -
943 592/STATION EQUIPMENT L 151 3,271,354 3,138,143 133,210
9"593/OVERHEAD LINES L 153+154 5,418,492 5,032,733 385,759
945 594/UNDERGROUND LINES L155+156 311,063 306,329 4,734
946595/LINE TRANSFORMERS L157 24,796 23,436 1,360
947 596/STREET LIGHTING&SIGNAL SYSTEMS L 161 93,462 88,810 4,652
948 597/METERS L 159 769,699 746,131 23,568
949 598/MISCELLANEOUS PLANT L 163 105,914 101,008 4,905
950 TOTAL DISTRIBUTION MAINTENANCE 10,002,534 9,443,987 558,547
951 TOTAL DISTRIBUTION EXPENSES 32,946,827 31,371,335 1,575,493
952
953 CUSTOMER ACCOUNTING EXPENSES
954 901/SUPERVISION L 959 794,380 759,746 34,634
955 902/METER READING Cw902 1,260,207 1,090,088 170,120
956903/CUSTOMER RECORDS&COLLECTIONS CW903 10,577,395 10,231,412 345,983
957 904/UNCOLLECTIBLE ACCOUNTS CW904 - - -
958 905/MISC EXPENSES L 955-957 - - -
959 TOTAL CUSTOMER ACCOUNTING EXPENSES 12,631,982 12,081,246 550,736
960
961 CUSTOMER SERVICES&INFORMATION EXPENSES
962 907/SUPERVISION L 965 836,042 803,545 32,497
963 908/CUSTOMER ASSISTANCE L 573 5,242,141 5,038,379 203,762
964 909/INFORMATION&INSTRUCTIONAL L 574 - - -
965 910/MISCELLANEOUS EXPENSES L 963+964 384,926 369,964 14,962
966 TOTAL CUST SERV&INFORMATN EXPENSES 6,463,109 6,211,888 251,221
967
968 SALES EXPENSES
969 912/DEMO&SELLING EXPENSES L 579 - - -
970 TOTAL SALES EXPENSES - - -
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 30 of 37

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
971 "**TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
972
973 ADMINISTRATIVE&GENERAL EXPENSES
974 920/ADMINISTRATIVE&GENERAL SALARIES PTOCAS 58,534,056 56,026,787 2,507,269
975 921/OFFICE SUPPLIES PTDCAS 403,723 386,430 17,293
976 922/ADMIN&GENERAL EXPENSES TRANSFERRED-CR SUBEX - - -
977 923/OUTSIDE SERVICES PTOCAS - - -
978 924/PROPERTY INSURANCE
979 PRODUCTION-STEAM L 100 - - -
980 ALL RISK&MISCELLANEOUS P710P 426,708 409,500 17,208
981 TOTAL ACCOUNT 924
982
983 925/INJURIES&DAMAGES LABOR 146,518 140,242 6,276
984 926/EMPLOYEE PENSIONS&BENEFITS LABOR - - -
985 927/FRANCHISE REQUIREMENTS CIDA - - -
986 928/REGULATORY COMMISSION EXPENSES
987 FERC ADMIN ASSESSMENTS L 179 - - -
988 FERC RATE CASE EXPENSE RESREV - - -
989 SEC EXPENSES L 179 - - -
990 IDAHO PUC-RATE CASE CIDA - - -
991 -OTHER CIDA - - -
992 OREGON PUC-RATE CASE CODA - - -
993 -OTHER CODA - - -
994 TOTAL ACCOUNT 928
995
996 929/DUPLICATE CHARGES SUBEX - - -
997 930.1/GENERAL ADVERTISING RELAB - - -
998 930.2/MISCELLANEOUS EXPENSES PTOCAS 198,088 189,603 8,485
999 931/RENTS L 177 - - -
1000935/GENERAL PLANT MAINTENANCE P3908 1,228,809 1,176,596 52,212
1001 TOTAL ADMIN&GENERAL EXPENSES 60,937,902 58,329,159 2,608,743
1002 TOTAL OPER&MAINT EXPENSES 158,798,646 151,998,101 6,800,545
1003
1004 TOTAL LABOR-RATIO 1%) 1 1 0
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 31 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1005"'`TABLE 14-ALLOCATION FACTORS
1006
1007 CAPACITY RELATED KW
1008 PRODUCTION RELATED COINCIDENT PEAKS @ GENERATION LEVE DIO 2,563,697 2,462,382 101,315
1009 SYSTEM TRANSMISSION SERVICE @ GENERATION LEVEL D11 2,563,697 2,462,382 101,315
1010 RETAIL TRANSMISSION D12 2,563,697 2,462,382 101,315
1011 DISTRIBUTION SERVICE @ GENERATION LEVEL D60 2,424,088 2,334,493 89,595
1012
1013 ENERGY RELATED MWH
1014 GENERATION LEVEL(PSP) E10 16,435,689 15,742,270 693,419
1015 RETAIL MWH AT GENERATION LVL E100 16,435,689 15,742,270 693,419
1016 CUSTOMER LEVEL E99 15,410,622 14,757,250 653,372
1017
1018 CUSTOMER RELATED FACTORS
1019 369-DIRECT ASSIGNMENT DA369 70,650,589 67,740,904 2,909,686
1020 370-METER INVESTMENT ACCT370 115,905,804 112,356,866 3,548,937
1021 902-CUSTOMER WEIGHTED CW902 2,122,543 1,836,014 286,529
1022 903-CUSTOMER WEIGHTED CW903 16,141,973 15,613,975 527,998
1023 904-CUSTOMER WEIGHTED CW904 3,786,792 3,419,345 367,446
1024 909-DIRECT ASSIGN-AVG.NO.CUST. DA909 624,419 604,506 19,913
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 32 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1025-TABLE TABLE 14-ALLOCATION FACTORS
1026
1027 DIRECT ASSIGNMENTS
1028 252-CUSTOMER ADVANCES DA252 32,170,424 32,110,363 60,062
1029 350-LAND&LAND RIGHTS DA350 - - -
1030 352-STRUCTURES&IMPROVEMENTS DA352 658 - 658
1031 353-STATION EQUIPMENT DA353 111,594 75,100 36,494
1032 354-TOWERS&FIXTURES DA354 - - -
1033 355-POLES&FIXTURES DA355 33,842 - 33,842
1034 356-OVERHEAD CONDUCTORS&DEVICES DA356 26,495 1,189 25,306
1035 359-ROADS&TRAILS DA359 - - -
1036 360-LAND&LAND RIGHTS ACCT360 9,024,558 8,641,897 382,661
1037 361-STRUCTURES&IMPROVEMENTS ACCT361 62,286,419 59,574,241 2,712,178
1038 362-STATION EQUIPMENT ACCT362 333,778,528 320,186,976 13,591,552
1039 364-POLES,TOWERS&FIXTURES DA364 333,422,399 307,301,185 26,121,215
1040 365-OVERHEAD CONDUCTORS&DEVICES DA365 161,939,763 152,866,451 9,073,313
1041 366-UNDERGROUND CONDUIT DA366 55,753,674 54,858,172 895,502
1042 367-UNDERGROUND CONDUCTORS&DEVICES DA367 338,826,990 333,716,692 5,110,297
1043 368-LINE TRANSFORMERS ACCT368 750,275,508 709,131,796 41,143,712
1044 371-INSTALLATIONS ON CUSTOMER PREMISES DA371 5,271,974 4,926,363 345,611
1045 373-STREET LIGHTING SYSTEMS DA373 6,798,038 6,459,698 338,340
1046 451-REVENUE-MISCELLANEOUS SERVICE DA451 5,103,805 5,043,528 60,277
1047 454-REVENUE-FACILITIES CHARGE DA454 10,841,971 10,407,743 434,228
1048 908-OTHER CUSTOMER ASSISTANCE DA908 7,567,753 7,274,479 293,274
1049 440-RETAIL SALES REVENUE RETREV 1,283,843,868 1,230,016,095 53,827,773
1050 447-WHOLESALE SALES REVENUE RESREV - - -
1051 RIDER FUND DIRECT ASSIGNMENT DARIDER - - -
1052 411-BOARDMAN ARO ACCRETION EXP DAACCRETION 12,995 12,485 509
1053 403-BOARDMAN ARO DEPRECIATION EXP DAARO - - -
1054 IDAHO CIDA 1 1 -
1055 OREGON CODA 1 - 1
1056 NET TO GROSS TAX MULTIPLIER DA990 1 1 1
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 33 of 37

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOCI TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1057—TABLE*TABLE 14-ALLOCATION FACTORS***
1058
1059 INTERNALLY DEVELOPED ALLOCATION FACTORS
1060 PLANT-PROD,TRANS&DIST PTO 6,383,232,307 6,112,007,526 271,224,781
1061 LAB-PROD,TRANS,DIST,CUSTACCT&CSIS PTDCAS 97,860,745 93,668,943 4,191,802
1062 PLANT-HYDRO,OTHER,TSUBS,DSUBS&GP P710P 3,040,787,236 2,918,158,498 122,628,738
1063 PLANT-GEN PLT(390,391,397&398) P3908 323,809,073 310,050,362 13,758,710
1064 PLANT-PROD,TRANS,DIST&GEN P1o1P 6,953,883,405 6,658,411,548 295,471,857
1065 O&M-PROD,TRANS,DIST,CUSTACCT&CSIS SUBEx 739,874,789 706,025,109 33,849,680
1066 LAB-PROD,TRANS,DIST,CUSTACCT&CSIS RELAB 97,860,745 93,668,943 4,191,802
1067 LAB-ALL LABOR WITHOUT925-6"CIRC" LABOR 158,225,421 151,448,360 6,777,061
1068 REV-RETAIL,RESALE&WHEELING FMREV 1,323,721,019 1,268,234,028 55,486,991
1069 O&M-ALL EXCEPT FUEL O&MM 745,935,548 712,456,451 33,479,097
1070 PLANT-89%*HYD PROD+II%*TRANS SURVEY 1,241,099,140 1,192,042,026 49,057,114
1071 O&M-TOTAL(NOT USED) OM401 934,441,471 893,018,187 41,423,284
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 34 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1072***TABLE 15-ALLOCATION FACTORS-RATIOS
1073
1074 CAPACITY RELATED KW
1075 PRODUCTION RELATED COINCIDENT PEAKS @ GENERATION LEVE D10 100.00% 96.05% 3.95%
1076 SYSTEM TRANSMISSION SERVICE @ GENERATION LEVEL D11 100.00% 96.05% 3.95%
1077 RETAIL TRANSMISSION D12 100.00% 96.05% 3.95%
1078 DISTRIBUTION SERVICE @ GENERATION LEVEL D60 100.00% 96.30% 3.70%
1079
1080 ENERGY RELATED MWH
1081 GENERATION LEVEL(PSP) E10 100.00% 95.78% 4.22%
1082 RETAIL MWH AT GENERATION LVL E100 100.00% 95.78% 4.22%
1083 CUSTOMER LEVEL E99 100.00% 95.76% 4.24%
1084
1085 CUSTOMER RELATED FACTORS
1086 369-DIRECT ASSIGNMENT DA369 100.00% 95.88% 4.12%
1087 370-METER INVESTMENT ACCT370 100.00% 96.94% 3.06%
1088 902-CUSTOMER WEIGHTED CW902 100.00% 86.50% 13.50%
1089 903-CUSTOMER WEIGHTED CW903 100.00% 96.73% 3.27%
1090 904-CUSTOMER WEIGHTED CW904 100.00% 90.30% 9.70%
1091 909-DIRECT ASSIGN-AVG.NO.CUST. DA909 100.00% 96.81% 3.19%
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 35 of 37

I IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1092-TABLE*TABLE 15-ALLOCATION FACTORS-RATIOS,.`
1093
1094 DIRECT ASSIGNMENTS
1095 252-CUSTOMER ADVANCES DA252 100.00% 99.81% 0.19%
1096 350-LAND&LAND RIGHTS DA350 #DIV/01 #DIV/0I #DIV/01
1097 352-STRUCTURES&IMPROVEMENTS DA352 100.00% 0.00% 100.00%
1098 353-STATION EQUIPMENT DA353 100.00% 67.30% 32.70%
1099 354-TOWERS&FIXTURES DA354 #DIV/01 #DIV/0I #DIV/01
1100 355-POLES&FIXTURES DA355 100.00% 0.00% 100.00%
1101 356-OVERHEAD CONDUCTORS&DEVICES DA356 100.00% 4.49% 95.51%
1102 359-ROADS&TRAILS DA359 #DIV/01 #DIV/0I #DIV/01
1103 360-LAND&LAND RIGHTS ACCT360 100.00% 95.76% 4.24%
1104 361-STRUCTURES&IMPROVEMENTS ACCT361 100.00% 95.65% 4.35%
1105 362-STATION EQUIPMENT ACCT362 100.00% 95.93% 4.07%
1106 364-POLES,TOWERS&FIXTURES DA364 100.00% 92.17% 7.83%
1107 365-OVERHEAD CONDUCTORS&DEVICES DA365 100.00% 94.40% 5.60%
1108 366-UNDERGROUND CONDUIT DA366 100.00% 98.39% 1.61%
1109 367-UNDERGROUND CONDUCTORS&DEVICES DA367 100.00% 98.49% 1.51%
1110 368-LINE TRANSFORMERS ACCT368 100.00% 94.52% 5.48%
1111 371-INSTALLATIONS ON CUSTOMER PREMISES DA371 100.00% 93.44% 6.56%
1112 373-STREET LIGHTING SYSTEMS DA373 100.00% 95.02% 4.98%
1113 451-REVENUE-MISCELLANEOUS SERVICE DA451 100.00% 98.82% 1.18%
1114 454-REVENUE-FACILITIES CHARGE DA454 100.00% 95.99% 4.01%
1115 908-OTHER CUSTOMER ASSISTANCE DA908 100.00% 96.12% 3.88%
1116 440-RETAIL SALES REVENUE RETREV 100.00% 95.81% 4.19%
1117 447-WHOLESALE SALES REVENUE RESREV #DIV/01 #DIV/0I #DIV/01
1118 IDAHO CIDA 100.00% 100.00% 0.00%
1119 OREGON CODA 100.00% 0.00% 100.00%
1120 NET TO GROSS TAX MULTIPLIER DA990 1.347 1.347 1.347
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 36 of 37

1 IDAHO POWER COMPANY
2 BEFORE THE OREGON PUBLIC UTILITY COMMISSION-TYPE I&II
3 JURISDICTIONAL SEPARATION STUDY
4 TWELVE MONTHS ENDED 12/31/2024
5
6
7 ALLOC/ TOTAL IDAHO OREGON
8 DESCRIPTION SOURCE SYSTEM IPUC OPUC
1121 ***TABLE 15-ALLOCATION FACTORS-RATIOS
1122
1123 INTERNALLY DEVELOPED ALLOCATION FACTORS
1124 PLANT-PROD,TRANS&DIST PTD 100.00% 95.75% 4.25%
1125 LAB-PROD,TRANS,DIST,CUST ACCT&CSIS PTDCAS 100.00% 95.72% 4.28%
1126 PLANT-HYDRO,OTHER,TSUBS,DSUBS&GP P110P 100.00% 95.97% 4.03%
1127 PLANT-GEN PLT(390,391,397&398) P3908 100.00% 95.75% 4.25%
1128 PLANT-PROD,TRANS,DIST&GEN P101P 100.00% 95.75% 4.25%
1129 O&M-PROD,TRANS,DIST,CUSTACCT&CSIS SUBEX 100.00% 95.42% 4.58%
1130 LAB-PROD,TRANS,DIST,CUST ACCT&CSIS RELAB 100.00% 95.72% 4.28%
1131 LAB-ALL LABOR WITHOUT 925-6 'CIRC" LABOR 100.00% 95.72% 4.28%
1132 REV-RETAIL,RESALE&WHEELING FMREV 100.00% 95.81% 4.19%
1133 O&M-ALL EXCEPT FUEL O&M M 100.00% 95.51% 4.49%
1134 PLANT-89%*HYD PROD+11%*TRANS SURVEY 100.00% 96.05% 3.95%
1135 O&M-TOTAL(NOT USED) OM401 100.00% 95.57% 4.43%
Exhibit No. 6
Case No. IPC-E-24-07
M. Larkin, IPC
2024 Increment Page 37 of 37

BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION
CASE NO. IPC-E-24-07
IDAHO POWER COMPANY
LARKIN , DI
TESTIMONY
EXHIBIT NO. 7

IDAHO POWER COMPANY
INCREMENTAL ELECTRIC PLANT IN SERVICE
December 31, 2024
Account Description 2023 GRC Settled Dec 2024 Balance Incremental EPIS
301 Organization 5,703.01 5,703.01 0.00
302 Franchises and Consents 52,690,323.89 67,759,450.41 15,069,126.52
303 Miscellaneous Intangible Plant 52,524,883.01 75,434,751.62 22,909,868.62
TOTAL INTANGIBLE PLANT 105,220,909.91 143,199,905.04 37,978,995.13
310 Land and Land Rights 347,595.67
311 Structures and Improvements 37,303,704.94
312 Boiler Plant Equipment 185,403,956.25
314 Turbogenerator Units 56,378,666.21
315 Accessory electric Equipment 16,473,701.28
316 Misc Power Plant Equipment 8,423,945.60
TOTAL STEAM PRODUCTION PLANT 274,155,558 304,331,569.95 30,176,012.00
330 Land and Land Rights 31,696,880.98
331 Structures and Improvements 297,845,397.13
332 Reservoirs, Dams, Waterways 317,158,044.63
333 Waterwheel, Turbines, Generato 423,900,667.59
334 Accessory Electric Equipment 78,247,063.33
335 Misc Power Plant Equipment 34,161,516.98
336 Roads, Railroads and Bridges 20,628,658.86
TOTAL HYDRO PRODUCTION PLANT 1,092,528,822 1,203,638,229.50 111,109,407.39
340 LAND AND LAND RIGHTS 2,699,793.95
341 Structures and Improvements 157,205,257.97
342 Fuel Holders, Producers, Acces 10,416,686.06
343 Prime Movers 293,488,715.33
344 Generators 67,698,206.49
345 Accessory Electric Equipment 94,132,712.68
346 Misc Power Plant Equipment 7,985,361.28
TOTAL OTHER PRODUCTION PLANT 625,844,417 633,626,733.76 7,782,316.76
3501X Land 4,328,646.72
35020 Land Rights and Easements 41,039,057 39,138,710.42 3,823,203.69
35022 Transm ROW Renewal Cost 1,394,903.80
352 Structures and Improvements 100,562,285 109,288,682.47 8,726,397.74
353 Station Equipment 468,500,193 507,541,457.65 39,041,265.10
354 Towers and Fixtures 237,158,275 254,182,187.22 17,023,911.98
355 Poles and Fixtures 236,066,559 271,608,628.69 35,542,070.09
356 Overhead Conductors, Devices 271,757,281 292,997,097.29 21,239,816.10
359 Roads and Trails 390,266 405,090.98 14,824.80
TOTAL TRANSMISSION PLANT 1,355,473,916 1,480,885,405.25 125,411,489.51
360 Land and Land Rights 9,601,720 10,392,399.49 790,679.41
361 Structures and improvements 62,384,614 73,907,861.51 11,523,247.16
362 Station Equipment 343,076,495 370,688,639.07 27,612,143.60
TOTAL SUBSTATION EQUIPMENT 415,062,830 454,988,900.07 39,926,070.17
363 Storage Battery Equipment 112,074,984 367,353,311.98 255,278,328.33
TOTAL STORAGE BATTERY EQUIPMENT
364 Poles, Towers and Fixtures 334,235,525 367,617,271.69 33,381,746.58
365 Overhead Conductors, Devices 162,758,591 173,759,820.73 11,001,229.42
366 Underground Conduit 54,848,113 61,422,626.86 6,574 14
�h14.ibit 7
Case No.IPC-E-24-07
M.Larkin, IPC
Page 1 of 2

367 Underground Conductors, Device 338,877,918 385,122,437.95 46,244,519.88
368 Line Transformers 745,644,817 819,847,335.92 74,202,519.29
369 Services 69,707,265 73,940,381.53 4,233,116.89
37000 Meters 20,114,093.15
37010 Meters-AM 116,503,219 105,259,706.82 8,870,580.99
371 Installations, Cust Premises 4,646,860 5,878,905.03 1,232,045.35
373 Street Lighting, Signal System 6,313,711 7,136,611.15 822,900.13
TOTAL DISTRIBUTION LINES 1,833,536,018 2,020,099,190.82 186,563,172.67
389 Land and Land Rights 20,940,797 21,077,173.52 136,376.58
390 Structures and Improvements 170,196,006 187,603,356.39 17,407,350.64
391 Office Furniture, Equipment 41,438,522 45,895,872.77 4,457,350.41
392 Transportation Equipment 119,914,591 146,232,891.07 26,318,299.96
393 Stores Equipment 5,476,857 8,997,577.75 3,520,720.79
394 Tools, Shop, Garage Equipment 15,380,479 16,583,328.91 1,202,850.02
395 Laboratory Equipment 14,914,034 16,747,259.21 1,833,225.66
396 Power Operated Equipment 27,588,092 31,516,343.02 3,928,251.12
397 Communication Equipment 82,670,542 89,930,528.21 7,259,986.61
398 Miscellaneous Equipment 11,406,368 11,482,711.48 76,343.94
TOTAL GENERAL EQUIPMENT PLANT 509,926,287 576,067,042.33 66,140,755.74
SUBTOTAL W/O ARO 6,323,823,741 7,184,190,288.70 860,366,548
Exhibit No.7
Case No.IPC-E-24-07
M.Larkin, IPC
Page 2 of 2

BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION
CASE NO. IPC-E-24-07
IDAHO POWER COMPANY
LARKIN , DI
TESTIMONY
EXHIBIT NO. 8

Incremental Labor Determination
Total2024 2023 2024
FERC Account Account Description O&M Labor Settlement Incremental
500001 Opr Pwr Prd Stm Gnr S&e-bridge - 11,455 (11,455)
500002 Opr Pwr Prd Stm Gnr S&e-board 119,076 96,745 22,331
500003 Opr Pwr Prd Stm Gnr S&e-valmy - 7,163 (7,163)
506003 Opr Pwr Prd Stm Gnr Msc-valmy - 139 (139)
535000 Opr Pwr Prd Hyd Pwr Gnr S&e 5,071,877 4,956,942 114,935
536000 Opr Pwr Prd Hyd Pwr Gnr Wtr Fp 177,428 176,702 726
536001 Opr Pwr Prd Hyd Cloudseeding 851,772 854,383 (2,611)
537000 Opr Pwr Prd Hyd Pwr Gnr Hyd 7,921,204 7,443,522 477,683
538000 Opr Pwr Prd Hyd Pwr Gnr El PI 2,043,598 1,801,400 242,198
539000 Opr Pwr Prd Hyd Pwr Gnr Misc 4,512,124 4,022,565 489,559
541000 Mnt Pwr Prd Hyd Pwr Gnr S&e 203,078 104,038 99,040
542000 Mnt Pwr Prd Hyd Pwr Gnr Strc 695,374 689,550 5,823
543000 Mnt Pwr Prd Hyd Pwr Gnr 388,415 302,571 85,844
544000 Mnt Pwr Prd Hyd Pwr Gnr El PI 2,091,697 2,105,412 (13,715)
545000 Mnt Pwr Prd Hyd Pwr Gnr Msc PI 2,790,986 2,619,430 171,556
546000 Opr Pwr Prd Othr Pwr Gnr S&e 709,301 609,948 99,353
548000 Opr Pwr Prd Othr Gnr 4,179,990 3,738,956 441,033
549000 Opr Pwr Prd Othr Gnr Msc 603,657 431,985 171,671
552000 Mnt Pwr Prd Othr Pwr Strc 57,499 53,429 4,070
553000 Mnt Pwr Prd Othr Pwr Gnr Gn&el 74,475 69,314 5,162
554000 Mnt Pwr Prd Oth Pwr Msc 613,733 554,042 59,691
557000 Opr Pwr Prd Oth Pwr Sp Oth Prd 5,816,830 5,226,939 589,891
560000 Opr Trns S&e 2,780,515 2,777,635 2,879
561200 Opr Trns-Load Dsptch-Monitor 3,373,046 2,842,838 530,207
561300 Opr Trns-Load Dsptch-Svc/Schd 435,990 536,073 (100,083)
561700 Opr Trns-Gen Intercnct Study 266,712 157,119 109,593
562000 Opr Trns Station Expenses 2,331,939 2,272,101 59,838
563000 Opr Trns Overhead Lines 603,510 505,284 98,225
568000 Mnt Trns S&e-mnt Trns S 170,055 105,816 64,239
569100 Mnt Trns Computer Hardware 25,156 28,021 (2,864)
569200 Mnt Trns Computer Software 1,678,905 1,637,358 41,547
569300 Mnt Trns-Comm Equipment 5,715 6,388 (673)
570000 Mnt Trns St Equp 3,171,421 2,720,699 450,722
571000 Maint Trans O/h Lines 1,315,416 1,048,408 267,008
573000 Mnt Trns Msc PI-other 1,337 4,259 (2,922)
580000 Opr Dstr Super&Engineering 3,923,571 3,522,183 401,388
581000 Opr Dstr Load Dispatching 6,258,508 5,395,277 863,231
582000 Opr Dstr Station Expenses 1,248,745 1,150,537 98,208
583000 Opr Dstr Overhead Line Exp 4,250,710 4,042,871 207,838
584000 Opr Dstr Undgrnd Ln Exp 1,912,171 1,551,681 360,490
585000 Opr Dstr Str Lt&Sgnl 2,392 24,691 (22,299)
586000 Opr Dstr Mtr Exp 5,705,346 4,843,487 861,859
587000 Opr Dstr Cust Installation 1,030,587 864,599 165,988
588000 Opr Dstr Msc Exp 3,629,610 3,430,741 198,869
590000 Mnt Dstr S&e 9,340 11,002 (1,662)
592000 Mnt Dstr St Equp 3,997,555 3,164,754 832,801
593000 Mnt Dstr Overhead Lines 6,736,276 6,239,308 496,969
594000 Mnt Dstr Underground Lines 442,387 427,358 15,029
595000 Mnt Dstr Ln Trnsfmrs 29,751 29,370 381
596000 Mnt Dstr Street Light&Signal 115,383 148,234 (32,851)1 Exhibit No. 8
Case No. IPC-E-24-07
M. Larkin, IPC
Page 1 of 2

Incremental Labor Determination
Total 2024 2023 2024
FERC Account Account Description O&M Labor Settlement Incremental
597000 Mnt Dstr Mtrs 935,752 795,630 140,121
598000 Mnt Dstr Msc-nt Grd Lt 128,594 95,035 33,559
901000 Opr Cust Acts&Sry Exp-spivs 949,406 834,306 115,100
902000 Opr Cust Acts&Sry Mtr Rdng 1,519,698 1,492,691 27,007
903000 Opr Cust Records&Coll Exp 11,910,965 10,740,459 1,170,506
907000 Opr Cust Srv-supervision 998,447 969,984 28,463
908000 Opr Cust Srv-cust Assist Exp 1.) 10,247,639 8,975,081 1,272,558
910000 Opr Cust Sry&Info 464,445 367,037 97,408
920000 Opr Admin&General Salaries 79,606,390 72,382,948 7,223,442
920001 Incentive 10,845,454 10,040,205 805,249
921000 Opr A&G Office Supp&Exp 11,118 290 10,828
921002 Opr A&g-Airplane Clearing 517,689 298,125 219,564
922999 P/r Bene Trnsfrd-cr (46,062,855) (36,723,488) (9,339,367)
924000 Opr A&g Prpty Ins-other 514,241 447,587 66,654
925000 Opr A&g Injrs&Dmgs 176,557 157,805 18,752
926104 Opr A&g Emp Pen&Ben-awrd/gft 509,793 549,591 (39,798)
926110 Opr A&g Emp Pen&Ben-If Ins (652,946) (836,860) 183,914
926111 Opr A&g Emp Pen&Ben-ret Life 230,484 82,292 148,193
926112 Opr A&g-emp Pen&Ben-tuition 67,347 83,093 (15,747)
926113 OprA&g-emp Pen&Ben-Med-Ibnr 707,608 536,000 171,608
926114 OprA&g-emp Pen&Ben-Den-Ibnr 5,113 (24,632) 29,746
926118 OPR A&G EMP PEN&BEN-HSA EC 2,034,807 1,922,771 112,036
926119 OPR A&G EMP PEN&BEN-VISION 318,570 192,953 125,617
926120 OprA&g Emp Pen&Ben-medical 25,312,720 21,319,943 3,992,776
926122 OprA&g Emp Pen&Ben-ret Med 1,868,931 521,152 1,347,779
926130 OprA&g Emp Pen&Ben-disablty 1,063,523 466,608 596,915
926141 OprA&g Emp Pen&Benefits-esp 10,624,980 9,186,078 1,438,901
926150 OprA&g Emp Pen&Ben-dental 1,873,910 1,845,528 28,382
926151 Opr A&g Emp Pen&Ben-ret Den 510,824 229,467 281,357
926160 Opr A&G Emp Pen&Ben-Fbap Adm 22,046 21,873 173
926180 Opr A&g Emp Pen&Ben-asst Pg 139,059 129,978 9,081
930200 OprA&g Msc Gnrl Exp 219,173 231,349 (12,177)
935000 MntA&g General Plant 1,486,545 1 1,227,049 1 259,496
Grand Total 213,480,186 1 193,922,651 1 19,557,535
1.)Added 2023 DSM labor charged to 254201 Idaho EE Rider account to appropriately allocate 2024 O&M
labor that includes DSM labor formerly charged to the Rider.
Exhibit No. 8
Case No. IPC-E-24-07
M. Larkin, IPC
Page 2of2

BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION
CASE NO. IPC-E-24-07
IDAHO POWER COMPANY
LARKIN , DI
TESTIMONY
EXHIBIT NO. 9

IDAHO POWER COMPANY
INCREMENTAL REVENUE ASSOCIATED WITH LOAD GROWTH
2023 ID kWh Sales
14,907,835,244
Mill Rate (Rate Base and Labor Only Rev Reg/Sales)
0.0440775
Incremental 2024 ID kWh Sales
124,724,470
Incremental 2024 Revenues
$ 5,497,548
Exhibit No. 9
Case No. IPC-E-24-07
M. Larkin, IPC
Page 1 of 1

BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION
CASE NO. IPC-E-24-07
IDAHO POWER COMPANY
LARKIN , DI
TESTIMONY
EXHIBIT NO. 10

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
1
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
4 SUMMARY OF RESULTS
5 RATE OF RETURN UNDER PRESENT RATES
6 TOTAL COMBINED RATE BASE 763,200,310 730,792,519 32,407,792
7
8 OPERATING REVENUES
9 FIRM JURISDICTIONAL SALES 5,497,548 5,497,548 0
10 SYSTEM OPPORTUNITY SALES 0 0 0
11 OTHER OPERATING REVENUES 0 0 0
12 TOTAL OPERATING REVENUES 5,497,548 5,497,548 0
13 OPERATING EXPENSES
14 OPERATION&MAINTENANCE EXPENSES 19,557,535 18,759,267 798,267
15 DEPRECIATION EXPENSE 21,088,273 20,210,085 878,189
16 AMORTIZATION OF LIMITED TERM PLANT 2,265,315 2,169,836 95,479
17 TAXES OTHER THAN INCOME 0 0 0
18 REGULATORY DEBITS/CREDITS 0 0 0
19 PROVISION FOR DEFERRED INCOME TAXES 3,173,455 3,039,028 134,427
20 INVESTMENT TAX CREDIT ADJUSTMENT 73,978,000 70,844,300 3,133,700
21 FEDERAL INCOME TAXES (82,058,780) (78,545,328) (3,513,452)
22 STATE INCOME TAXES (10,668,322) (10,205,030) (463,292)
23 TOTAL OPERATING EXPENSES 27,335,476 26,272,158 1,063,317
24 OPERATING INCOME (21,837,928) (20,774,610) (1,063,317)
25 ADD: IERCO OPERATING INCOME 0 0 0
26 CONSOLIDATED OPERATING INCOME (21,837,928) (20,774,610) (1,063,317)
27 RATE OF RETURN UNDER PRESENT RATES -2.86% -2.84% -3.28%
28
29 DEVELOPMENT OF REVENUE REQUIREMENTS
30 RATE OF RETURN @ 9.6%ROE 7.247% 7.247% 7.247%
31
32 RETURN 55,309,127 52,960,534 2,348,593
33 EARNINGS DEFICIENCY 77,147,054 73,735,144 3,411,910
34 ADD:CWIP (HELLS CANYON RELICENSING) D10 0 0 0
35 EARNINGS DEFICIENCY WITH CWIP 77,147,054 73,735,144 3,411,910
36
37 NET-TO-GROSS TAX MULTIPLIER 1.347 1.347 1.347
38 REVENUE DEFICIENCY 103,887,766 99,293,220 4,594,546
39
40 ADD:VALMY REVENUE REQUIREMENT CIDA 0 0 0
41 ADD:BRIDGER REVENUE REQUIREMENT CIDA 0 0 0
42 LESS:BATTERY ADITC MITIGATION CIDA 0 0 0
43 REVENUE DEFICIENCY LESS ADJUSTMENTS 103,887,766 99,293,220 4,594,546
44
45
46
47
48
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Pagel of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
49 SUMMARY OF RESULTS
50 DEVELOPMENT OF RATE BASE COMPONENTS
51 ELECTRIC PLANT IN SERVICE
52 INTANGIBLE PLANT 37,978,995 36,393,810 1,585,185
53 PRODUCTION PLANT 149,067,736 142,986,714 6,081,022
54 TRANSMISSION PLANT 125,411,490 120,295,493 5,115,997
55 DISTRIBUTION PLANT 481,767,571 460,930,056 20,837,515
56 GENERAL PLANT 66,140,756 63,339,040 2,801,715
57 TOTAL ELECTRIC PLANT IN SERVICE 860,366,548 823,945,114 36,421,434
58 LESS:ACCUM PROVISION FOR DEPRECIATION 88,598,095 84,945,117 3,652,978
59 AMORT OF OTHER UTILITY PLANT 5,394,687 5,168,451 226,237
60 NET ELECTRIC PLANT IN SERVICE 766,373,765 733,831,546 32,542,219
61 LESS:CUSTOMER ADV FOR CONSTRUCTION 0 0 0
62 LESS:ACCUM DEFERRED INCOME TAXES 3,173,455 3,039,028 134,427
63 ADD:PLT HLD FOR FUTURE+ACQUIS ADJ 0 0 0
64 ADD:WORKING CAPITAL 0 0 0
65 ADD:CONSERVATION+OTHER DFRD PROG. 0 0 0
66 ADD:SUBSIDIARY RATE BASE 0 0 0
67 TOTAL COMBINED RATE BASE 763,200,310 730,792,519 32,407,792
68
69 DEVELOPMENT OF NET INCOME COMPONENTS
70 OPERATING REVENUES
71 SALES REVENUES 5,497,548 5,497,548 0
72 OTHER OPERATING REVENUES 0 0 0
73 TOTAL OPERATING REVENUES 5,497,548 5,497,548 0
74 OPERATING EXPENSES
75 OPERATION&MAINTENANCE EXPENSES 19,557,535 18,759,267 798,267
76 DEPRECIATION EXPENSE 21,088,273 20,210,085 878,189
77 AMORTIZATION OF LIMITED TERM PLANT 2,265,315 2,169,836 95,479
78 TAXES OTHER THAN INCOME 0 0 0
79 REGULATORY DEBITS/CREDITS 0 0 0
80 PROVISION FOR DEFERRED INCOME TAXES 3,173,455 3,039,028 134,427
81 INVESTMENT TAX CREDIT ADJUSTMENT 73,978,000 70,844,300 3,133,700
82 FEDERAL INCOME TAXES (82,058,780) (78,545,328) (3,513,452)
83 STATE INCOME TAXES (10,668,322) (10,205,030) (463,292)
84 TOTAL OPERATING EXPENSES 27,335,476 26,272,158 1,063,317
85 OPERATING INCOME (21,837,928) (20,774,610) (1,063,317)
86 ADD: IERCO OPERATING INCOME E10 0 0 0
87 CONSOLIDATED OPERATING INCOME (21,837,928) (20,774,610) (1,063,317)
88
89 NET POWER SUPPLY COSTS:
90 ACCT447/SURPLUS SALES 0 0 0
91 ACCT 501/FUEL-THERMAL PLANTS 0 0 0
92 ACCT 547/FUEL-OTHER 0 0 0
93 ACCT 555/NON-FIRM PURCHASES 0 0 0
94 ACCT 555/DEMAND RESPONSE INCENTIVE 0 0 0
95 ACCT 555/CSPP PURCHASES 0 0 0
96 SUBTOTAL 0 0 0
97 ACCT 536/WATER FOR POWER(PCA&OTHER) 0 0 0
98 ACCT 565/TRANS OF ELECTRICTY BY OTHERS 0 0 0
99 TOTAL NET POWER SUPPLY COSTS 0 0 0
100 OTHER O&M Exhibit No.10
101 TOTAL O&M EXPENSES 19,557,535 18,759,267 798,267 Case No.IPC-E-24-07
102 LESS: ACCT 501/FUEL-THERMAL PLANTS 0 0 0 M.Larkin,IPC
2024 Page 2 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
103 ACCT 547/FUEL-OTHER 0 0 0
104 ACCT 555/NON-FIRM PURCHASES 0 0 0
105 ACCT 555/DEMAND RESPONSE INCENTIVE 0 0 0
106 ACCT 555/CSPP PURCHASES 0 0 0
107 SUBTOTAL 19,557,535 18,759,267 798,267
108 ACCT 536/WATER FOR POWER(PCA&OTHER) 0 0 0
109 ACCT 565/TRANS OF ELECTRICTY BY OTHERS 0 0 0
110 ACCT416/MERCHANDISING EXPENSE 0 0 0
111 NET OTHER O&M 19,557,535 18,759,267 798,267
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 3 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
112 TABLE 1-ELECTRIC PLANT/N SERVICE (386,020,032)
113 INTANGIBLE PLANT
114 301-ORGANIZATION P101 P $ - 0 0
115 302-FRANCHISES&CONSENTS D10 15,069,127 14,454,401 614,725
116 303-MISCELLANEOUS P101 P 22,909,869 21,939,409 970,460
117
118 TOTAL INTANGIBLE PLANT 37,978,995 36,393,810 1,585,185
119
120 PRODUCTION PLANT
121 310-316/STEAM PRODUCTION D10 30,176,012 28,945,021 1,230,991
122 330-336/HYDRAULIC PRODUCTION D10 111,109,407 106,576,845 4,532,562
123 340-346/OTHER PRODUCTION-BASE LOAD D10 5,460,179 5,237,439 222,741
124 340-346/OTHER PRODUCTION-PEAKERS D10 2,322,137 2,227,409 94,729
125
126 TOTAL PRODUCTION PLANT 149,067,736 142,986,714 6,081,022
127
128 TRANSMISSION PLANT
129 350/LAND&LAND RIGHTS-SYSTEM SERVICE D11 3,823,204 3,667,241 155,963
130 DIRECT ASSIGNMENT DA350 0 0 0
131 TOTAL ACCOUNT 350 3,823,204 3,667,241 155,963
132
133 352/STRUCTURES&IMPROVEMENTS-SYSTEM SERVICE D11 8,726,398 8,370,416 355,982
134 DIRECT ASSIGNMENT DA352 0 0 0
135 TOTAL ACCOUNT 352 8,726,398 8,370,416 355,982
136
137 353/STATION EQUIPMENT-SYSTEM SERVICE D11 39,041,265 37,448,628 1,592,637
138 DIRECT ASSIGNMENT DA353 0 0 0
139 TOTAL ACCOUNT 353 39,041,265 37,448,628 1,592,637
140
141 354/TOWERS&FIXTURES-SYSTEM SERVICE D11 17,023,912 16,329,444 694,468
142 DIRECT ASSIGNMENT DA354 0 0 0
143 TOTAL ACCOUNT 354 17,023,912 16,329,444 694,468
144
145 355/POLES&FIXTURES-SYSTEM SERVICE D11 35,542,070 34,092,178 1,449,892
146 DIRECT ASSIGNMENT DA355 0 0 0
147 TOTAL ACCOUNT 355 35,542,070 34,092,178 1,449,892
148
149 356/OVERHEAD CONDUCTORS&DEVICES-SYSTEM SERVICE D11 21,239,816 20,373,366 866,450
150 DIRECT ASSIGNMENT DA356 0 0 0
151 TOTAL ACCOUNT 356 21,239,816 20,373,366 866,450
152
153 359/ROADS&TRAILS-SYSTEM SERVICE D11 14,825 14,220 605
154 DIRECT ASSIGNMENT DA359 0 0 0
155 TOTAL ACCOUNT 359 14,825 14,220 605
156
157 TOTAL TRANSMISSION PLANT 125,411,490 120,295,493 5,115,997
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 4 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
158 TABLE 1-ELECTRIC PLANT/N SERVICE
159
160 DISTRIBUTION PLANT
161 360/LAND&LAND RIGHTS-SYSTEM SERVICE ACCT360 790,679 763,476 27,203
162 PLUS:ADJUSTMENT FOR CIAC ACCT360CIAC 0 0 0
163 DISTRIBUTION PLANT+CIAC 790,679 763,476 27,203
164
165 361/STRUCTURES&IMPROVEMENTS-SYSTEM SERVICE ACCT361 11,523,247 10,978,691 544,557
166 PLUS:ADJUSTMENT FOR CIAC ACCT361CIAC 0 0 0
167 DISTRIBUTION PLANT+CIAC 11,523,247 10,978,691 544,557
168
169 362/STATION EQUIPMENT-SYSTEM SERVICE ACCT362 27,612,144 26,449,129 1,163,015
170 PLUS:ADJUSTMENT FOR CIAC ACCT362CIAC 0 0 0
171 DISTRIBUTION PLANT+CIAC 27,612,144 26,449,129 1,163,015
172
173 363/STORAGE BATTERY EQUIPMENT D10 255,278,328 244,864,585 10,413,743
174 TOTAL BATTERY STORAGE EQUIPMENT 255,278,328 244,864,585 10,413,743
175
176 364/POLES,TOWERS&FIXTURES DA364 33,381,747 30,775,202 2,606,544
177 365/OVERHEAD CONDUCTORS&DEVICES DA365 11,001,229 10,372,809 628,420
178 366/UNDERGROUND CONDUIT DA366 6,574,514 6,471,533 102,981
179 367/UNDERGROUND CONDUCTORS&DEVICES DA367 46,244,520 45,557,642 686,878
180 368/LINE TRANSFORMERS DA368 74,202,519 70,108,375 4,094,144
181 369/SERVICES DA369 4,233,117 4,067,481 165,636
182 370/METERS DA370 8,870,581 8,584,046 286,535
183 371/INSTALLATIONS ON CUSTOMER PREMISES DA371 1,232,045 1,147,044 85,001
184 373/STREET LIGHTING SYSTEMS DA373 822,900 790,042 32,858
185
186 TOTAL DISTRIBUTION PLANT(without CIAC) 481,767,571 460,930,056 20,837,515
187
188 GENERALPLANT
189 389/LAND&LAND RIGHTS PTD 136,377 130,600 5,777
190 390/STRUCTURES&IMPROVEMENTS PTD 17,407,351 16,669,977 737,374
191 391/OFFICE FURNITURE&EQUIPMENT PTD 4,457,350 4,268,538 188,813
192 392/TRANSPORTATION EQUIPMENT PTD 26,318,300 25,203,460 1,114,840
193 393/STORES EQUIPMENT PTD 3,520,721 3,371,583 149,137
194 394/TOOLS,SHOP&GARAGE EQUIPMENT PTD 1,202,850 1,151,897 50,953
195 395/LABORATORY EQUIPMENT PTD 1,833,226 1,755,570 77,655
196 396/POWER OPERATED EQUIPMENT PTD 3,928,251 3,761,851 166,400
197 397/COMMUNICATIONS EQUIPMENT PTD 7,259,987 6,952,454 307,532
198 398/MISCELLANEOUS EQUIPMENT PTD 76,344 73,110 3,234
199
200 TOTAL GENERAL PLANT 66,140,756 63,339,040 2,801,715
201
202 TOTAL ELECTRIC PLANT IN SERVICE(without CIAC) 860,366,548 823,945,114 36,421,434
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 5 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
203 TABLE 2-ACCUMULATED PROVISION FOR DEPRECIATION
204
205 PRODUCTION PLANT
206 310-316/STEAM PRODUCTION L 121 38,829,782 37,245,772 1,584,010
207 330-336/HYDRAULIC PRODUCTION L 122 23,502,564 22,543,808 958,756
208 340-346/OTHER PRODUCTION-BASE LOAD L 123 (9,142,916) (8,769,943) (372,973)
209 340-346/OTHER PRODUCTION-PEAKERS L 124 (3,888,354) (3,729,733) (158,620)
210 TOTAL PRODUCTION PLANT 49,301,076 47,289,903 2,011,172
211
212 TRANSMISSION PLANT
213 350/LAND&LAND RIGHTS L 131 438,309 420,429 17,880
214 352/STRUCTURES&IMPROVEMENTS L 135 1,119,495 1,073,827 45,668
215 353/STATION EQUIPMENT L 139 914,188 876,895 37,293
216 354/TOWERS&FIXTURES L 143 2,162,756 2,074,529 88,227
217 355/POLES&FIXTURES L 147 1,282,452 1,230,137 52,316
218 356/OVERHEAD CONDUCTORS&DEVICES L 151 (643,591) (617,336) (26,254)
219 359/ROADS&TRAILS L 155 2,744 2,632 112
220 TOTAL TRANSMISSION PLANT 5,276,353 5,061,111 215,242
221
222 DISTRIBUTION PLANT
223 360/LAND&LAND RIGHTS L 161 28,342 27,367 975
224 361/STRUCTURES&IMPROVEMENTS L 165 822,436 783,570 38,866
225 362/STATION EQUIPMENT L 169 3,129,730 2,997,907 131,823
226 363/STORAGE BATTERY EQUIPMENT L 173 5,219,455 5,006,534 212,921
227 364/POLES,TOWERS&FIXTURES L 176 1,173,924 1,082,261 91,663
228 365/OVERHEAD CONDUCTORS&DEVICES L 177 1,099,933 1,037,102 62,831
229 366/UNDERGROUND CONDUIT L 178 468,344 461,008 7,336
230 367/UNDERGROUND CONDUCTORS&DEVICES L 179 3,574,819 3,521,721 53,097
231 368/LINE TRANSFORMERS L 180 5,739,011 5,422,360 316,652
232 369/SERVICES L 181 978,886 940,584 38,302
233 370/METERS L 182 2,343,243 2,267,552 75,691
234 371/INSTALLATIONS ON CUSTOMER PREMISES L 183 (59,426) (55,326) (4,100)
235 373/STREET LIGHTING SYSTEMS L 184 897,258 861,431 35,827
236 TOTAL DISTRIBUTION PLANT 25,415,955 24,354,070 1,061,885
237
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 6 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
238 TABLE 2-ACCUMULATED PROVISION FOR DEPRECIATION
239
240 GENERALPLANT
241 389/LAND&LAND RIGHTS L 189 0 0 0
242 390/STRUCTURES&IMPROVEMENTS L 190 1,040,569 996,490 44,078
243 391/OFFICE FURNITURE&EQUIPMENT L 191 912,215 873,574 38,641
244 392/TRANSPORTATION EQUIPMENT L 192 1,760,108 1,685,550 74,558
245 393/STORES EQUIPMENT L 193 218,505 209,249 9,256
246 394/TOOLS,SHOP&GARAGE EQUIPMENT L 194 439,176 420,573 18,603
247 395/LABORATORY EQUIPMENT L 195 412,494 395,021 17,473
248 396/POWER OPERATED EQUIPMENT L 196 1,148,778 1,100,116 48,662
249 397/COMMUNICATIONS EQUIPMENT L 197 2,849,017 2,728,333 120,684
250 398/MISCELLANEOUS EQUIPMENT L 198 120,148 115,059 5,089
251 TOTAL GENERAL PLANT 8,901,011 8,523,965 377,046
252
253 AMORTIZATION OF DISALLOWED COSTS L 118 (296,299) (283,932) (12,367)
254
255 TOTAL ACCUM PROVISION DEPRECIATION 88,598,095 84,945,117 3,652,978
256
257 AMORTIZATION OF OTHER UTILITY PLANT
258 302/FRANCHISES AND CONSENTS L 115 1,456,720 1,397,295 59,425
259 303/MISCELLANEOUS INTANGIBLE PLANT L 116 3,937,967 3,771,155 166,812
260
261 TOTAL AMORT OF OTHER UTILITY PLANT 5,394,687 5,168,451 226,237
262
263 TOTAL ACCUM PROVISION FOR DEPR
264 &AMORTIZATION OF OTHER UTILITY PLANT 93,992,783 90,113,568 3,879,215
265
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 7 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
266 TABLE 3-ADDITIONS&DEDUCTIONS TO RATEBASE
267
268 NET ELECTRIC PLANT IN SERVICE 766,373,765 733,831,546 32,542,219
269 LESS:
270 252 CUSTOMER ADVANCES FOR CONSTRUCTION
271 POWER SUPPLY D10 0 0 0
272 OTHER DA252 0 0 0
273 TOTAL CUSTOMER ADV FOR CONSTRUCTION 0 0 0
274
275 ACCUMULATED DEFERRED INCOME TAXES
276 190/ACCUMULATED DEFERRED INCOME TAXES
277 CUSTOMER ADVANCES FOR CONSTUCTION DA252 0 0 0
278 OTHER LABOR 0 0 0
279 TOTAL ACCOUNT190 0 0 0
280 281/ACCELERATED AMORTIZATION P101 P 0 0 0
281 282/OTHER PROPERTY P101 P 3,173,455 3,039,028 134,427
282 283/OTHER P101 P 0 0 0
283 TOTAL ACCUM DEFERRED INCOME TAXES 3,173,455 3,039,028 134,427
284
285 NET ELECTRIC PLANT IN SERVICE 763,200,310 730,792,518 32,407,792
286 ADD:
287 WORKING CAPITAL
288 151/FUEL INVENTORY E10 0 0 0
289 154&163/PLANT MATERIALS&SUPPLIES
290 PRODUCTION-GENERAL L 126 0 0 0
291 TRANSMISSION-GENERAL L 157 0 0 0
292 DISTRIBUTION-GENERAL L 186+CIAC 0 0 0
293 OTHER-UNCLASSIFIED L 202 0 0 0
294 TOTAL ACCOUNT 154&163 0 0 0
295 165/PREPAID ITEMS
296 AD VALOREM TAXES L 700 0 0 0
297 OTHER PROD-RELATED PREPAYMENTS D10 0 0 0
298 INSURANCE L 126 0 0 0
299 PENSION EXPENSE L 1042 0 0 0
300 PREPAID RETIREE BENEFITS L 1042 0 0 0
301 MISCELLANEOUS PREPAYMENTS P101P 0 0 0
302 TOTAL ACCOUNT165 0 0 0
303 WORKING CASH ALLOWANCE L 621 0 0 0
304
305 TOTAL WORKING CAPITAL 0 0 0
306
307 NET ELECTRIC PLANT IN SERVICE 763,200,310 730,792,518 32,407,792
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 8 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
308 TABLE 3-ADDITIONS&DEDUCTIONS TO RATEBASE
309
310 NET ELECTRIC PLANT IN SERVICE 763,200,310 730,792,518 32,407,792
311 ADD:
312 105/PLANT HELD FOR FUTURE USE
313 HYDRAULIC PRODUCTION L 122 0 0 0
314 TRANS LAND&LAND RIGHTS L 131 0 0 0
315 TRANS STRUCTURES&IMPROVEMENTS L 135 0 0 0
316 TRANS STATION EQUIPMENT L 139 0 0 0
317 DIST LAND&LAND RIGHTS L 163 0 0 0
318 DIST STRUCTURES&IMPROVEMENTS L 167 0 0 0
319 DIST STATIONS EQUIPMENT 0
320 GEN LAND&LAND RIGHTS L 189 0 0 0
321 GEN STRUCTURES&IMPROVEMENTS L 190 0 0 0
322 COMMUNICATION L 192 0 0 0
323 TOTAL PLANT HELD FOR FUTURE USE 0 0 0
324
325 114/115-ASSET EXCHANGE ACQUISITION ADJUSTMENT CIDA 0 0 0
326
327 DEFERRED PROGRAMS:
328 182/ CONSERVATION PROGRAMS
329 IDAHO DEFERRED CONSERVATION PROGRAMS CIDA 0 0 0
330 OREGON DEFERRED CONSERVATION PROGRAMS CODA 0 0 0
331 TOTAL CONSERVATION PROGRAMS 0 0 0
332 182&186/MISC.OTHER REGULATORY ASSETS
333 CUB FUND INTEREST(OPUC 15-399) CODA 0 0 0
334 AM.FALLS BOND REFINANCING D10 0 0 0
335 SFAS 87 CAPITALIZED PENSION-OPUC ORDER 10-064 CODA 0 0 0
336 CLOUD COMPUTING-(IPUC Order 34707) CIDA 0 0 0
337 WILDFIRE MITIGATION(IPUC Order 35077) CIDA 0 0 0
338 SIEMENS LTP RATE BASE(IPUC Order 33420) CIDA 0 0 0
339 SIEMENS LTP DEFERRED RATE BASE(IPUC Order 33420) CIDA 0 0 0
340 SIEMENS LTP RATE BASE(OPUC ORDER 15-387) CODA 0 0 0
341 SIEMENS LTP DEFERRED RATE BASE(OPUC ORDER 15-387) CODA 0 0 0
342 TOTAL OTHER REGULATORY ASSETS 0 0 0
343 186/MISC.OTHER DEFERRED PROGRAMS 0 0 0
344 254/JIM BRIDGER PLANT END OF LIFE DEPR-OPUC ORD 12-296 CODA 0 0 0
345 RECONNECT FEES-(OPUC ADV 16-09) CODA 0 0 0
346 TOTAL DEFERRED PROGRAMS 0 0 0
347
348 DEVELOPMENT OF IERCO RATE BASE
349 INVESTMENT IN IERCO E10 0 0 0
350 PREPAID COAL ROYALTIES E10 0 0 0
351 NOTES PAYABLE TO/RECEIVABLE FROM SUBSIDIARY E10 0 0 0
352 TOTAL SUBSIDIARY RATE BASE 0 0 0
353
354 TOTAL COMBINED RATE BASE 763,200,310 730,792,519 32,407,792
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 9 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
355 TABLE 4-OPERATING REVENUES
356 FIRM ENERGY SALES
357 440-448/RETAIL RETREV 5,497,548 5,497,548 0
358 442/BASE REVENUE TRANSFER-PCA CIDA 0 0 0
359 442/BASE REVENUE TRANSFER-EE RIDER CIDA 0 0 0
360 447/FIRM SALES FOR RESALE E10 0 0 0
361 447/SYSTEM OPPORTUNITY SALES E10 0 0 0
362 447.050/FINANCIAL LOSSES E10 0 0 0
363 TOTAL SALES OF ELECTRICITY 5,497,548 5,497,548 0
364
365 OTHER OPERATING REVENUES
366 415/MERCHANDISING REVENUES D60 0 0 0
367
368 449/OATT TARIFF REFUND
369 NETWORK D11 0 0 0
370 POINT-TO-POINT D11 0 0 0
371 TOTAL ACCOUNT 449 0 0 0
372
373 451/MISCELLANEOUS SERVICE REVENUES DA451 0 0 0
374
375 454/RENTS FROM ELECTRIC PROPERTY
376 SUBSTATION EQUIPMENT L 139 0 0 0
377 TRANSFORMER RENTALS D11 0 0 0
378 LINE RENTALS D11 0 0 0
379 COGENERATION L 498 0 0 0
380 REAL ESTATE RENTS L 200 0 0 0
381 DARK FIBER PROJECT CIDA 0 0 0
382 POLE ATTACHMENTS L 176 0 0 0
383 FACILITIES CHARGES DA454 0 0 0
384 OTHER RENTALS L122 0 0 0
385 MISCELLANEOUS PTD 0 0 0
386 TOTAL ACCO U NT 454 0 0 0
387
388 456/OTHER ELECTRIC REVENUES
389 TRANSMISSION NETWORK SERVICES-FIRM DA D11 0 0 0
390 TRANSMISSION NETWORK SERVICES-DIST FACILITIES D60 0 0 0
391 TRANSMISSION POINT-TO-POINT D11 0 0 0
392 PHOTOVOLTAIC STATION SERVICE L 186+CIAC 0 0 0
393 ENERGY EFFICIENCY RIDER CIDA 0 0 0
394 STAND-BY SERVICE DASTNBY 0 0 0
395 SIERRA PACIFIC USAGE CHARGE E10 0 0 0
396 ANTELOPE L 518 0 0 0
397 MISCELLANEOUS PTD 0 0 0
398 TOTAL ACCOUNT 456 0 0 0
399
400 TOTAL OTHER OPERATING REVENUES 0 0 0
401
402 TOTAL OPERATING REVENUES 5,497,548 5,497,548 0
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 10 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
403 TABLE 5-OPERATION&MAINTENANCE EXPENSES
404 STEAM POWER GENERATION
405 OPERATION
406 500/SUPERVISION&ENGINEERING D10 3,713 3,561 151
407 501/FUEL E10 0 0 0
408 502/STEAM EXPENSES
409 LABOR D10 0 0 0
410 OTHER E10 0 0 0
411 TOTAL ACCOUNT502 0 0 0
412 505/ELECTRIC EXPENSES
413 LABOR D10 0 0 0
414 OTHER E10 0 0 0
415 TOTAL ACCOUNT 505 0 0 0
416 506/MISCELLANEOUS EXPENSES D10 (139) (134) (6)
417 507/RENTS L 121 0 0 0
418 STEAM OPERATION EXPENSES 3,573 3,428 146
419
420 MAINTENANCE
421 510/SUPERVISION&ENGINEERING D10 0 0 0
422 511 /STRUCTURES D10 0 0 0
423 512/BOILER PLANT
424 LABOR D10 0 0 0
425 OTHER E10 0 0 0
426 TOTAL ACCOUNT 512 0 0 0
427 513/ELECTRIC PLANT
428 LABOR D10 0 0 0
429 OTHER E10 0 0 0
430 TOTAL ACCOUNT 513 0 0 0
431 514/MISCELLANEOUS STEAM PLANT D10 0 0 0
432 STEAM MAINTENANCE EXPENSES 0 0 0
433 TOTAL STEAM GENERATION EXPENSES 3,573 3,428 146
434
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 11 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
435 TABLE 5-OPERATION&MAINTENANCE EXPENSES
436 HYDRAULIC POWER GENERATION
437 OPERATION
438 535/SUPERVISION&ENGINEERING L 895 114,935 110,217 4,718
439 536/WATER FOR POWER
440 WATER FOR POWER/WCLOUD SEEDING D10 (1,885) (1,808) (77)
441 WATER LEASE D10 0 0 0
442 53(TOTAL ACCOUNT 536 (1,885) (1,808) (77)
443 537/HYDRAULIC EXPENSES D10 477,683 458,196 19,486
444 538/ELECTRIC EXPENSES
445 LABOR D10 242,198 232,317 9,880
446 OTHER E10 0 0 0
447 TOTAL ACCOUNT 538 242,198 232,317 9,880
448 539/MISCELLANEOUS EXPENSES D10 489,559 469,588 19,971
449 540/RENTS D10 0 0 0
450 HYDRAULIC OPERATION EXPENSES 1,322,489 1,268,510 53,978
451
452 MAINTENANCE
453 541/SUPERVISION&ENGINEERING L 906 99,040 95,000 4,040
454 542/STRUCTURES D10 5,823 5,586 238
455 543/RESERVOIRS,DAMS&WATERWAYS D10 85,844 82,342 3,502
456 544/ELECTRIC PLANT
457 LABOR D10 (13,715) (13,155) (559)
458 OTHER E10 0 0 0
459 TOTAL ACCOUNT 544 (13,715) (13,155) (559)
460 545/MISCELLANEOUS HYDRAULIC PLANT L 122 171,556 164,558 6,998
461 HYDRAULIC MAINTENANCE EXPENSES 348,549 334,330 14,219
462 TOTAL HYDRAULIC GENERATION EXPENSES 1,671,038 1,602,841 68,197
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 12 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
463 TABLE 5-OPERATION&MAINTENANCE EXPENSES
464 OTHER POWER GENERATION
465 OPERATION
466 546/SUPERVISION&ENGINEERING L 919 99,353 95,300 4,053
467 547/FUEL
468 DIESEL FUEL E10 0 0 0
469 OTHER E10 0 0 0
470 BRIDGER-GAS OPERATIONS E10 0 0 0
471 TOTAL ACCOUNT 547 0 0 0
472 548/GENERATING EXPENSES
473 LABOR D10 441,033 423,042 17,991
474 OTHER E10 0 0 0
475 TOTAL ACCOUNT 548 441,033 423,042 17,991
476 549/MISCELLANEOUS EXPENSES D10 171,671 164,668 7,003
477 550/RENTS D10 0 0 0
478 OTHER POWER OPER EXPENSES 712,057 683,010 29,047
479
480 MAINTENANCE
481 551/SUPERVISION&ENGINEERING L 929 0 0 0
482 552/STRUCTURES D10 4,070 3,904 166
483 553/GENERATING&ELECTRIC PLANT
484 LABOR D10 5,162 4,951 211
485 OTHER E10 0 0 0
486 TOTAL ACCOUNT 553 5,162 4,951 211
487 554/MISCELLANEOUS EXPENSES L 124 59,691 57,256 2,435
488 OTHER POWER MAINT EXPENSES 68,923 66,111 2,812
489 TOTAL OTHER POWER GENERATION EXP 780,980 749,121 31,859
490
491 OTHER POWER SUPPLY EXPENSE
492 555.0/PURCHASED POWER
493 POWER EXPENSE E10 0 0 0
494 OTHER CIDA 0 0 0
495 TRANSMISSION LOSSES E10 0 0 0
496 DEMAND RESPONSE INCENTIVE CIDA 0 0 0
497 TOTAL 555.0/PURCHASED POWER 0 0 0
498 555.1/COGENERATION&SMALL POWER PROD E10 0 0 0
499 555/TOTAL 0 0 0
500 556/LOAD CONTROL&DISPATCHING EXPENSES D10 0 0 0
501 557/OTHER EXPENSES
502 PCA/EPC ACCOUNTS CIDA 0 0 0
503 OREGON POWER COST-RELATED EXPENSES CODA 0 0 0
504 OTHER D10 589,891 565,827 24,064
505 557/TOTAL 589,891 565,827 24,064
506 TOTAL OTHER POWER SUPPLY EXPENSES 589,891 565,827 24,064
507
508 TOTAL PRODUCTION EXPENSES 3,045,482 2,921,217 124,266
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 13 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
509 TABLE 5-OPERATION&MAINTENANCE EXPENSES
510 TRANSMISSION EXPENSES
511 OPERATION
512 560/SUPERVISION&ENGINEERING L 157 2,879 2,762 117
513 561/LOAD DISPATCHING D12 539,717 517,700 22,017
514 562/STATION EXPENSES L 139 59,838 57,397 2,441
515 563/OVERHEAD LINE EXPENSES L 143+147+151 98,225 94,218 4,007
516 565/TRANSMISSION OF ELECTRICITY BY OTHERS E10 0 0 0
517 566/MISCELLANEOUS EXPENSES L157 0 0 0
518 567/RENTS L 157 0 0 0
519 TOTAL TRANSMISSION OPERATION 700,660 672,077 28,582
520
521 MAINTENANCE
522 568/SUPERVISION&ENGINEERING L 157 64,239 61,619 2,621
523 569/STRUCTURES L 135 38,010 36,459 1,551
524 570/STATION EQUIPMENT L 139 450,722 432,335 18,387
525 571/OVERHEAD LINES L 143+147+151 267,008 256,116 10,892
526 573/MISCELLANEOUS PLANT L 157 (2,922) (2,803) (119)
527 TOTAL TRANSMISSION MAINTENANCE 817,057 783,726 33,331
528
529 TOTAL TRANSMISSION EXPENSES 1,517,716 1,455,803 61,913
530
531 REGIONAL MARKET EXPENSES
532 OPERATION
533 575/OPER TRANS MKT ADMIN-EIM L 157 0 0 0
534
535 TOTAL REGIONAL MARKET EXPENSES 0 0 0
536
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 14 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
537 TABLE 5-OPERATION&MAINTENANCE EXPENSES
538 DISTRIBUTION EXPENSES
539 OPERATION
540 580/SUPERVISION&ENGINEERING L 186 401,388 384,027 17,361
541 581/LOAD DISPATCHING D60 863,231 830,537 32,694
542 582/STATION EXPENSES L 171 98,208 94,072 4,136
543 583/OVERHEAD LINE EXPENSES L 176+177 207,838 192,689 15,149
544 584/UNDERGROUND LINE EXPENSES L 178+179 360,490 355,099 5,391
545 585/STREET LIGHTING&SIGNAL SYSTEMS L 184 (22,299) (21,409) (890)
546 586/METER EXPENSES L 182 861,859 834,019 27,840
547 587/CUSTOMER INSTALLATIONS EXPENSE L 183 165,988 154,536 11,452
548 588/MISCELLANEOUS EXPENSES L 186 198,869 190,268 8,602
549 589/RENTS L 186 0 0 0
550 TOTAL DISTRIBUTION OPERATION 3,135,573 3,013,839 121,734
551
552 MAINTENANCE
553 590/SUPERVISION&ENGINEERING L 186 (1,662) (1,590) (72)
554 591/STRUCTURES L167 0 0 0
555 592/STATION EQUIPMENT L 171 832,801 797,724 35,077
556 593/OVERHEAD LINES L 176+177 496,969 460,746 36,223
557 594/UNDERGROUND LINES L 178+179 15,029 14,805 225
558 595/LINE TRANSFORMERS L 180 381 360 21
559 596/STREET LIGHTING&SIGNAL SYSTEMS L 184 (32,851) (31,540) (1,312)
560 597/METERS L 182 140,121 135,595 4,526
561 598/MISCELLANEOUS PLANT L 186 33,559 32,107 1,451
562 TOTAL DISTRIBUTION MAINTENANCE 1,484,347 1,408,207 76,140
563 TOTAL DISTRIBUTION EXPENSES 4,619,920 4,422,046 197,874
564
565 CUSTOMER ACCOUNTING EXPENSES
566 901/SUPERVISION L 999 115,100 109,361 5,739
567 902/METER READING CW902 27,007 23,392 3,615
568 903/CUSTOMER RECORDS&COLLECTIONS CW903 1,170,506 1,132,078 38,428
569 904/UNCOLLECTIBLE ACCOUNTS CW904 0 0 0
570 905/MISC EXPENSES L 567+568+569 0 0 0
571 TOTAL CUSTOMER ACCOUNTING EXPENSES 1,312,613 1,264,831 47,781
572
573 CUSTOMER SERVICES&INFORMATION EXPENSES
574 907/SUPERVISION L 1007 28,463 27,724 739
575 908/CUSTOMER ASSISTANCE
576 SYSTEM CONSERVATION E10 0 0 0
577 OTHER CUSTOMER ASSISTANCE DA908 1,272,558 1,239,537 33,021
578 TOTAL ACCOUNT908 1,272,558 1,239,537 33,021
579 909/INFORMATION&INSTRUCTIONAL DA909 0 0 0
580 910/MISCELLANEOUS EXPENSES L 578+579 97,408 94,880 2,528
581 912/DEMO AND SELLING EXPENSES E10 0 0 0
582 TOTAL CUST SERV&INFORMATN EXPENSES 1,398,429 1,362,142 36,287
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 15 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
583 TABLE 5-OPERATION&MAINTENANCE EXPENSES
584 ADMINISTRATIVE&GENERAL EXPENSES
585 920/ADMINISTRATIVE&GENERAL SALARIES LABOR 8,028,691 7,682,492 346,198
586 921/OFFICE SUPPLIES LABOR 230,392 220,458 9,935
587 922/ADMIN&GENERAL EXPENSES TRANSFERRED-CR LABOR (9,339,367) (8,936,652) (402,715)
588 923/OUTSIDE SERVICES LABOR 0 0 0
589 924/PROPERTY INSURANCE
590 PRODUCTION-STEAM D10 0 0 0
591 ALL RISK&MISCELLANEOUS P110P 66,654 63,882 2,772
592 TOTAL ACCOUNT 924 66,654 63,882 2,772
593 925/INJURIES&DAMAGES LABOR 18,752 17,943 809
594 926/EMPLOYEE PENSIONS&BENEFITS LABOR 8,410,933 8,048,252 362,681
595 EMPLOYEE PENSIONS&BENEFITS-OREGON CODA 0 0 0
596 EMPLOYEE PENSIONS&BENEFITS-IDAHO CIDA 0 0 0
597 EMPLOYEE PENSIONS&BENEFITS-CAPITALIZED OREGON CODA 0 0 0
598 927/FRANCHISE REQUIREMENTS CIDA 0 0 0
599 928/REGULATORY COMMISSION EXPENSES
600 928.101/FERC ADMIN ASSESS&SECURITIES
601 CAPACITY RELATED D10 0 0 0
602 ENERGY RELATED E10 0 0 0
603 FERC RATE CASE E99 0 0 0
604 FERC ORDER 472 D11 0 0 0
605 FERC OTHER D11 0 0 0
606 FERC-OREGON HYDRO FEE D11 0 0 0
607 SEC EXPENSES CIDA 0 0 0
608 IDAHO PUC -RATE CASE CIDA 0 0 0
609 -OTHER CIDA 0 0 0
610 OREGON PUC-RATE CASE CODA 0 0 0
611 -OTHER CODA 0 0 0
612 TOTAL ACCOUNT 928 0 0 0
613 929/DUPLICATE CHARGES LABOR 0 0 0
614 930.1/GENERAL ADVERTISING LABOR 0 0 0
615 930.2/MISCELLANEOUS EXPENSES LABOR (12,177) (11,652) (525)
616 931/RENTS L 200 0 0 0
617 TOTAL ADM&GEN OPERATION 7,403,878 7,084,724 319,154
618 PLUS:
619 935/GENERAL PLANT MAINTENANCE L 200 259,496 248,504 10,992
620 416/MERCHANDISING EXPENSE D60 0 0 0
621 TOTAL OPER&MAINT EXPENSES 19,557,535 18,759,267 798,267
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 16 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
622 TABLE 6-DEPRECIATION&AMORTIZATION EXPENSE
623
624 DEPRECIATION EXPENSE
625 310-316/STEAM PRODUCTION L 121 897,709 861,089 36,621
626 330-336/HYDRAULIC PRODUCTION L 122 2,671,493 2,562,513 108,980
627 340-346/OTHER PRODUCTION-BASELOAD L 123 190,196 182,437 7,759
628 340-346/OTHER PRODUCTION-PEAKERS L 124 80,887 77,588 3,300
629 TOTAL PRODUCTION PLANT 3,840,286 3,683,626 156,659
630
631 TRANSMISSION PLANT
632 350/LAND&LAND RIGHTS L 131 60,621 58,148 2,473
633 352/STRUCTURES&IMPROVEMENTS L 135 155,594 149,246 6,347
634 353/STATION EQUIPMENT L 139 772,586 741,069 31,517
635 354/TOWERS&FIXTURES L 143 160,021 153,493 6,528
636 355/POLES&FIXTURES L 147 797,742 765,199 32,543
637 356/OVERHEAD CONDUCTORS&DEVICES L 151 267,279 256,376 10,903
638 359/ROADS&TRAILS L 155 102 98 4
639 TOTAL TRANSMISSION PLANT 2,213,945 2,123,630 90,315
640
641 DISTRIBUTION PLANT
642 360/LAND&LAND RIGHTS L 163 (1,838) (1,775) (63)
643 361/STRUCTURES&IMPROVEMENTS L 167 188,344 179,443 8,901
644 362/STATION EQUIPMENT L 171 281,157 269,315 11,842
645 363/STORAGE BATTERY EQUIPMENT L 173 9,627,639 9,234,892 392,747
646 364/POLES,TOWERS&FIXTURES L 176 516,031 475,738 40,293
647 365/OVERHEAD CONDUCTORS&DEVICES L 177 187,020 176,337 10,683
648 366/UNDERGROUND CONDUIT L 178 127,898 125,894 2,003
649 367/UNDERGROUND CONDUCTORS&DEVICES L 179 811,051 799,005 12,047
650 368/LINE TRANSFORMERS L 180 1,180,703 1,115,557 65,146
651 369/SERVICES L 181 63,601 61,112 2,489
652 370/METERS L 182 311,142 301,091 10,050
653 371/INSTALLATIONS ON CUSTOMER PREMISES L 183 51,182 47,651 3,531
654 373/STREET LIGHTING SYSTEMS L 184 19,480 18,702 778
655 TOTAL DISTRIBUTION PLANT 13,363,409 12,802,962 560,446
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 17 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
656 TABLE 6-DEPRECIATION&AMORTIZATION EXPENSE
657
658 GENERALPLANT
659 389/LAND&LAND RIGHTS L 189 0 0 0
660 390/STRUCTURES&IMPROVEMENTS L 190 535,348 512,671 22,677
661 391/OFFICE FURNITURE&EQUIPMENT L 191 636,073 609,129 26,944
662 392/TRANSPORTATION EQUIPMENT L 192 (66,407) (63,594) (2,813)
663 393/STORES EQUIPMENT L 193 129,334 123,855 5,479
664 394/TOOLS,SHOP&GARAGE EQUIPMENT L 194 51,369 49,193 2,176
665 395/LABORATORY EQUIPMENT L 195 85,142 81,535 3,607
666 396/POWER OPERATED EQUIPMENT L 196 0 0 0
667 397/COMMUNICATIONS EQUIPMENT L 197 328,077 314,179 13,897
668 398/MISCELLANEOUS EQUIPMENT L 198 (28,300) (27,101) (1,199)
669 TOTAL GENERAL PLANT 1,670,634 1,599,866 70,768
670
671 TOTAL DEPRECIATION EXPENSE 21,088,273 20,210,085 878,189
672
673 DEPRECIATION ON DISALLOWED COSTS L 118 0 0 0
674 TOTAL DEPRECIATION EXPENSE 21,088,273 20,210,085 878,189
675
676 AMORTIZATION EXPENSE
677 302/FRANCHISES AND CONSENTS L 115 306,290 293,795 12,495
678 303/MISCELLANEOUS INTANGIBLE PLANT L 116 1,959,025 1,876,041 82,984
679 ADJUSTMENTS,GAINS&LOSSES L 118 0 0 0
680 TOTAL AMORTIZATION EXPENSE 2,265,315 2,169,836 95,479
681
682 TOTAL DEPRECIATION&AMORTIZATION EXP 23,353,588 22,379,921 973,667
683
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 18 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
684 TABLE 7-TAXES OTHER THAN INCOME TAXES
685
686 TAXES OTHER THAN INCOME
687 FEDERALTAXES
688 FICA LABOR 0 0 0
689 FUTA LABOR 0 0 0
690 LESS PAYROLL DEDUCTION LABOR 0 0 0
691
692 STATE TAXES
693 AD VALOREM TAXES
694 JIM BRIDGER STATION L 121 0 0 0
695 VALMY L 121 0 0 0
696 OTHER-PRODUCTION PLANT L 126 0 0 0
697 OTHER-TRANSMISSION PLANT L 157 0 0 0
698 OTHER-DISTRIBUTION PLANT L 186 0 0 0
699 OTHER-GENERAL PLANT L200 0 0 0
700 SUB-TOTAL 0 0 0
701
702 LICENSES-HYDRO PROJECTS L 122 0 0 0
703
704 REGULATORY COMMISSION FEES
705 STATE OF IDAHO CIDA 0 0 0
706 STATE OF OREGON CODA 0 0 0
707
708 FRANCHISE TAXES
709 STATE OF OREGON CODA 0 0 0
710
711 OTHER STATE TAXES
712 UNEMPLOYMENTTAXES LABOR 0 0 0
713 HYDRO GENERATION KWH TAX E10 0 0 0
714 IRRIGATION-PIC E10 0 0 0
715
716 TOTAL TAXES OTHER THAN INCOME 0 0 0
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 19 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
717 TABLE 8-REGULATORY DEBITS&CREDITS
718 REGULATORY DEBITS/CREDITS
719 STATE OF IDAHO CIDA 0 0 0
720 STATE OF OREGON CODA 0 0 0
721
722 TOTAL REGULATORY DEBITS/CREDITS 0 0 0
723
724
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 20 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
725 TABLE 9-INCOME TAXES
726
727 410/411 NET PROVISION FOR DEFERRED INCOME TAXES
728 ACCOUNT#282-RELATED P101 P 3,173,455 3,039,028 134,427
729 ACCOUNTS#190&#283-RELATED L 756 0 0 0
730 TOTAL NET PROVISION FOR DEFERRED INCOME TAXES 3,173,455 3,039,028 134,427
731
732 411.4-INVESTMENT TAX CREDIT ADJUSTMENT P101 P 73,978,000 70,844,300 3,133,700
733
734 SUMMARY OF INCOME TAXES
735
736 TOTAL FEDERAL INCOME TAX (82,058,780) (78,545,328) (3,513,452)
737
738 STATE INCOME TAX
739 STATE OF IDAHO (10,357,367) (9,908,006) (449,361)
740 STATE OF OREGON (233,216) (222,768) (10,448)
741 OTHER STATES (77,739) (74,256) (3,483)
742 TOTAL STATE INCOME TAXES (10,668,322) (10,205,030) (463,292)
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 21 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
743 TABLE 10-CALCULATION OF FEDERAL INCOME TAX
744 OPERATING REVENUES 5,497,548 5,497,548 0
745
746 OPERATING EXPENSES
747 OPERATION&MAINTENANCE 19,557,535 18,759,267 798,267
748 DEPRECIATION EXPENSE 21,088,273 20,210,085 878,189
749 AMORTIZATION OF LIMITED TERM PLANT 2,265,315 2,169,836 95,479
750 TAXES OTHER THAN INCOME 0 0 0
751 REGULATORY DEBITS/CREDITS 0 0 0
752 TOTAL OPERATING EXPENSES 42,911,123 41,139,188 1,771,935
753
754 BOOK-TAX ADJUSTMENT L 752 0 0 0
755
756 INCOME BEFORE TAX ADJUSTMENTS(NOI Before Interest) (37,413,575) (35,641,640) (1,771,935)
757
758 INCOME STATEMENT ADJUSTMENTS
759 INTEREST EXPENSE SYNCHRONIZATION L 354 25,426,280 24,346,604 1,079,677
760
761 NET OPERATING INCOME BEFORE TAXES (62,839,855) (59,988,244) (2,851,611)
762
763 TOTAL STATE INCOME TAXES(ALLOWED) (10,668,322) (10,205,030) (463,292)
764
765 NET FEDERAL INCOME AFTER STATE INCOME TAXES (52,171,533) (49,783,214) (2,388,319)
766
767 FEDERAL TAX AT 21 PERCENT @ 21% (10,956,022) (10,454,475) (501,547)
768 OTHER CURRENT TAX ADJUSTMENTS L 767 0 0 0
769 PRIOR YEAR TAX ADJUSTMENT L 767 0 0 0
770
771 TOTAL FEDERAL INCOME TAX BEFORE OTHER ADJUSTMENTS (10,956,022) (10,454,475) (501,547)
772
773 OTHER TAX ADJUSTMENTS
774 ALLOWANCE FOR AFUDC P101 P 0 0 0
775 FEDERAL INCOME TAX ADJUSTMENTS-PLANT P101 P (14,898,848) (14,267,734) (631,114)
776 FEDERAL INCOME TAX ADJUSTMENTS-OTHER L 756 0 0 0
777 SUM OF OTHER ADJUSTMENTS (14,898,848) (14,267,734) (631,114)
778 FEDERAL TAX ON OTHER TAX ADJ AT 21 PERCENT @ 21% (3,128,758) (2,996,224) (132,534)
779 FEDERAL GENERAL BUSINESS CREDITS P101 P 67,974,000 65,094,629 2,879,371
780
781 TOTAL FEDERAL INCOME TAX (82,058,780) (78,545,328) (3,513,452)
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 22 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
782 TABLE 11-OREGON STATE INCOME TAX
783
784 NET OPERATING INCOME BEFORE TAXES-OREGON L 761 (62,839,855) (59,988,244) (2,851,611)
785
786 ALLOWANCE FOR AFUDC P101 P 0 0 0
787 STATE INCOME TAX ADJUSTMENTS-PLANT P101 P (14,898,848) (14,267,734) (631,114)
788 STATE INCOME TAX ADJUSTMENTS-OTHER L 756 0 0 0
789 ADD: OTHER L 756 0 0 0
790
791 TOTAL STATE INCOME TAX ADJUSTMENTS-OREGON (14,898,848) (14,267,734) (631,114)
792
793 INCOME SUBJECT TO OREGON TAX (77,738,703) (74,255,978) (3,482,725)
794
795 IERCO TAXABLE INCOME E10 0 0 0
796 BONUS DEPRECIATION&OTHER OREGON ADJ P101 P 0 0 0
797 OTHER L 756 0 0 0
798
799 TOTAL STATE TAXABLE INCOME-OREGON (77,738,703) (74,255,978) (3,482,725)
800 APPORTIONMENT FACTOR(0.045454550) @ 0.045454550 (3,533,578) (3,375,272) (158,306)
801 POST APPORTIONMENT M ITEMS L 756 0 0 0
802 TOTAL TAXABLE INCOME-OREGON (3,533,578) (3,375,272) (158,306)
803
804 OREGON TAX AT6.6 PERCENT @ 6.60% (233,216) (222,768) (10,448)
805 LESS:INVESTMENT TAX CREDIT P101 P 0 0 0
806
807 STATE INCOME TAX ALLOWED-OREGON (233,216) (222,768) (10,448)
808 ADD: OR CAT TAX L 785 0 0 0
809 PRIOR YEARS'TAX ADJUSTMENT L 785 0 0 0
810
811 STATE INCOME TAX PAID-OREGON (233,216) (222,768) (10,448)
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 23 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
812 TABLE 12-IDAHO STATE INCOME TAX
813
814 NET OPERATING INCOME BEFORE TAXES-IDAHO L 744 (62,839,855) (59,988,244) (2,851,611)
815
816 ALLOWANCE FOR AFUDC P101 P 0 0 0
817 STATE INCOME TAX ADJUSTMENTS-PLANT P101 P (14,898,848) (14,267,734) (631,114)
818 STATE INCOME TAX ADJUSTMENTS-OTHER L 756 0 0 0
819
820 INCOME SUBJECT TO IDAHO TAX (77,738,703) (74,255,978) (3,482,725)
821
822 IERCO TAXABLE INCOME E10 0 0 0
823 BONUS DEPRECIATION ADJUSTMENT P101 P 0 0 0
824 OTHER L 756 0 0 0
825 TOTAL STATE TAXABLE INCOME-IDAHO (77,738,703) (74,255,978) (3,482,725)
826 APPORTIONMENT FACTOR(.965517241) @ 0.965517241 (75,058,058) (71,695,427) (3,362,631)
827 POST APPORTIONMENT SCHEDULE M L 756 0 0 0
828 TOTAL TAXABLE INCOME-IDAHO (75,058,058) (71,695,427) (3,362,631)
829 IDAHO TAX AT 5.8 PERCENT @ 5.80% (4,353,367) (4,158,335) (195,033)
830 LESS:INVESTMENT TAX CREDIT P101 P 6,004,000 5,749,671 254,329
831
832 STATE INCOME TAX ALLOWED-IDAHO (10,357,367) (9,908,006) (449,361)
833 ADD: CURRENT TAX ADJUSTMENT L 829 0 0 0
834 PRIOR YEARS'TAX ADJUSTMENT 829 0 0 0
835 STATE INCOME TAX PAID-IDAHO (10,357,367) (9,908,006) (449,361)
836
837 OTHER STATE INCOME TAX
838 INCOME SUBJECT TO TAX (77,738,703) (74,255,978) (3,482,725)
839
840 IERCO TAXABLE INCOME E10 0 0 0
841 BONUS DEPRECIATION ADJUSTMENT P101 P 0 0 0
842 OTHER L 756 0 0 0
843 TOTAL TAXABLE INCOME-OTHER STATES (77,738,703) (74,255,978) (3,482,725)
844 APPORTIONMENT FACTOR(1.0) (77,738,703) (74,255,978) (3,482,725)
845 POST APPORTIONMENT SCHEDULE M L 759 0 0 0
846 TAXABLE INCOME (77,738,703) (74,255,978) (3,482,725)
847 OTHER TAX AT 0.1 PERCENT @ 0.10% (77,739) (74,256) (3,483)
848 ADD:CURRENT YEAR'S TAX DEFICIENCY L 832 0 0 0
849 PRIOR YEARS'TAX ADJUSTMENT L 832 0 0 0
850 OTHER STATES'INCOME TAX PAID (77,739) (74,256) (3,483)
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 24 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
851 TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
852 STEAM POWER GENERATION
853 OPERATION
854 500/SUPERVISION&ENGINEERING L 855-865 266,133 255,277 10,857
855 501/FUEL D10 2,559,614 2,455,198 104,416
856 502/STEAM EXPENSES
857 LABOR D10 1,607,750 1,542,164 65,586
858 OTHER D10 0 0 0
859 TOTAL ACCOUNT 502 1,607,750 1,542,164 65,586
860 505/ELECTRIC EXPENSES
861 LABOR D10 626,112 600,571 25,541
862 OTHER D10 0 0 0
863 TOTAL ACCOUNT 505 626,112 600,571 25,541
864 506/MISCELLANEOUS EXPENSES D10 3,352,418 3,215,661 136,757
865 507/RENTS D10 0 0 0
866 STEAM OPERATION EXPENSES 8,412,027 8,068,870 343,158
867
868 MAINTENANCE
869 510/SUPERVISION&ENGINEERING L 870-879 0 0 0
870 511 /STRUCTURES D10 658 631 27
871 512/BOILER PLANT
872 LABOR D10 3,983,710 3,821,200 162,510
873 OTHER D10 0 0 0
874 TOTAL ACCOUNT 512 3,983,710 3,821,200 162,510
875 513/ELECTRIC PLANT
876 LABOR D10 1,522,637 1,460,523 62,114
877 OTHER D10 0 0 0
878 TOTAL ACCOUNT 513 1,522,637 1,460,523 62,114
879 514/MISCELLANEOUS STEAM PLANT D10 2,441,874 2,342,261 99,613
880 STEAM MAINTENANCE EXPENSES 7,948,879 7,624,615 324,264
881 TOTAL STEAM GENERATION EXPENSES 16,360,906 15,693,485 667,422
882
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 25 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
883 TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
884 HYDRAULIC POWER GENERATION
885 OPERATION
886 535/SUPERVISION&ENGINEERING L 887-894 4,235,258 4,061,414 173,844
887 536/WATER FOR POWER E10 866,414 828,021 38,393
888 537/HYDRAULIC EXPENSES D10 6,262,192 6,006,734 255,458
889 538/ELECTRIC EXPENSES
890 LABOR D10 1,510,454 1,448,837 61,617
891 OTHER D10 0 0 0
892 TOTAL ACCOUNT 538 1,510,454 1,448,837 61,617
893 539/MISCELLANEOUS EXPENSES D10 3,401,219 3,262,471 138,748
894 540/RENTS D10 0 0 0
895 HYDRAULIC OPERATION EXPENSES 16,275,537 15,607,477 668,060
896
897 MAINTENANCE
898 541/SUPERVISION&ENGINEERING L 899-905 90,192 86,513 3,679
899 542/STRUCTURES D10 577,669 554,103 23,565
900 543/RESERVOIRS,DAMS&WATERWAYS D10 254,872 244,475 10,397
901 544/ELECTRIC PLANT
902 LABOR D10 1,799,397 1,725,993 73,404
903 OTHER D10 0 0 0
904 TOTAL ACCOUNT 544 1,799,397 1,725,993 73,404
905 545/MISCELLANEOUS HYDRAULIC PLANT D10 2,163,612 2,075,350 88,262
906 HYDRAULIC MAINTENANCE EXPENSES 4,885,742 4,686,434 199,307
907 TOTAL HYDRAULIC GENERATION EXPENSES 21,161,279 20,293,911 867,367
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 26 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
908 TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
909 OTHER POWER GENERATION
910 OPERATION
911 546/SUPERVISION&ENGINEERING L 912-918 516,722 495,643 21,079
912 547/FUEL E10 0 0 0
913 548/GENERATING EXPENSES
914 LABOR D10 3,234,939 3,102,974 131,965
915 OTHER D10 0 0 0
916 TOTAL ACCOUNT 548 3,234,939 3,102,974 131,965
917 549/MISCELLANEOUS EXPENSES D10 370,607 355,488 15,118
918 550/RENTS D10 0 0 0
919 OTHER POWER OPER EXPENSES 4,122,267 3,954,105 168,162
920
921 MAINTENANCE
922 551/SUPERVISION&ENGINEERING L 923-928 0 0 0
923 552/STRUCTURES D10 43,046 41,290 1,756
924 553/GENERATING&ELECTRIC PLANT
925 LABOR D10 56,825 54,507 2,318
926 OTHER D10 0 0 0
927 TOTAL ACCOUNT 553 56,825 54,507 2,318
928 554/MISCELLANEOUS EXPENSES D10 690,424 662,259 28,165
929 OTHER POWER MAINT EXPENSES 790,295 758,056 32,239
930 TOTAL OTHER POWER GENERATION EXP 4,912,562 4,712,161 200,402
931
932 OTHER POWER SUPPLY EXPENSE
933 555.0/PURCHASED POWER E10 0 0 0
934 555.1/COGENERATION&SMALL POWER PROD
935 CAPACITY RELATED D10 0 0 0
936 ENERGY RELATED E10 0 0 0
937 TOTAL 555.1/CSPP 0 0
938 555/TOTAL 0 0
939 556/LOAD CONTROL&DISPATCHING EXPENSES D10 0 0 0
940 557/OTHER EXPENSES D10 4,495,330 4,311,949 183,381
941 TOTAL OTHER POWER SUPPLY EXPENSES 4,495,330 4,311,949 183,381
942
943 TOTAL PRODUCTION EXPENSES 46,930,078 45,011,506 1,918,572
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 27 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
944 TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
945 TRANSMISSION EXPENSES
946 OPERATION
947 560/SUPERVISION&ENGINEERING L 157 2,380,639 2,283,524 97,115
948 561/LOAD DISPATCHING D12 3,053,979 2,929,396 124,583
949 562/STATION EXPENSES L 139 1,883,621 1,806,781 76,840
950 563/OVERHEAD LINE EXPENSES L 143+147+151 428,401 410,925 17,476
951 565/TRANSMISSION OF ELECTRICITY BY OTHERS E10 0 0 0
952 566/MISCELLANEOUS EXPENSES L 529 0 0 0
953 567/RENTS L 157 0 0 0
954 TOTAL TRANSMISSION OPERATION 7,746,639 7,430,625 316,014
955
956 MAINTENANCE
957 568/SUPERVISION&ENGINEERING L 157 90,949 87,239 3,710
958 569/STRUCTURES L 135 1,442,019 1,383,194 58,825
959 570/STATION EQUIPMENT L 139 2,327,169 2,232,236 94,934
960 571/OVERHEAD LINES L 143+147+151 865,811 830,491 35,320
961 573/MISCELLANEOUS PLANT L 157 3,520 3,376 144
962 TOTAL TRANSMISSION MAINTENANCE 4,729,468 4,536,536 192,932
963
964 TOTAL TRANSMISSION EXPENSES 12,476,107 11,967,161 508,946
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 28 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
965 TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
966 DISTRIBUTION EXPENSES
967 OPERATION
968 580/SUPERVISION&ENGINEERING L 186 2,995,909 2,866,330 129,580
969 581/LOAD DISPATCHING D60 4,166,909 4,009,091 157,818
970 582/STATION EXPENSES L 171 983,432 942,010 41,422
971 583/OVERHEAD LINE EXPENSES L 176+177 3,611,849 3,348,590 263,259
972 584/UNDERGROUND LINE EXPENSES L 178+179 1,372,655 1,352,128 20,527
973 585/STREET LIGHTING&SIGNAL SYSTEMS L 184 20,365 19,552 813
974 586/METER EXPENSES L 182 4,176,379 4,041,475 134,904
975 587/CUSTOMER INSTALLATIONS EXPENSE L 183 736,676 685,851 50,825
976 588/MISCELLANEOUS EXPENSES L 563 2,911,186 2,786,499 124,688
977 589/RENTS L 186 0 0 0
978 TOTAL DISTRIBUTION OPERATION 20,975,360 20,051,526 923,834
979
980 MAINTENANCE
981 590/SUPERVISION&ENGINEERING L 186 9,353 8,948 405
982 591/STRUCTURES L167 0 0 0
983 592/STATION EQUIPMENT L 171 2,716,642 2,602,218 114,424
984 593/OVERHEAD LINES L 176+177 5,201,009 4,821,920 379,089
985 594/UNDERGROUND LINES L 178+179 304,799 300,241 4,558
986 595/LINE TRANSFORMERS L 180 25,793 24,370 1,423
987 596/STREET LIGHTING&SIGNAL SYSTEMS L 184 123,794 118,851 4,943
988 597/METERS L 182 678,112 656,208 21,904
989 598/MISCELLANEOUS PLANT L 186 79,964 76,506 3,459
990 TOTAL DISTRIBUTION MAINTENANCE 9,139,466 8,609,262 530,204
991 TOTAL DISTRIBUTION EXPENSES 30,114,827 28,660,788 1,454,039
992
993 CUSTOMER ACCOUNTING EXPENSES
994 901/SUPERVISION L 995 705,017 610,646 94,371
995 902/METER READING CW902 1,267,888 1,098,173 169,715
996 903/CUSTOMER RECORDS&COLLECTIONS CW903 9,731,713 9,412,221 319,492
997 904/UNCOLLECTIBLE ACCOUNTS CW904 0 0 0
998 905/MISC EXPENSES L 995-997 0 0 0
999 TOTAL CUSTOMER ACCOUNTING EXPENSES 11,704,618 11,121,040 583,577
1000
1001 CUSTOMER SERVICES&INFORMATION EXPENSES
1002 907/SUPERVISION L 1006 828,671 807,168 21,503
1003 908/CUSTOMER ASSISTANCE L 575 4,679,331 4,557,909 121,422
1004 908/ENERGY EFFICIENCY RIDER CIDA 0 0 0
1005 909/INFORMATION&INSTRUCTIONAL L 579 0 0 0
1006 910/MISCELLANEOUS EXPENSES L 1003+1005 308,799 300,787 8,013
1007 TOTAL CUST SERV&INFORMATN EXPENSES 5,816,801 5,665,863 150,938
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 29 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
1008 TABLE 13-DEVELOPMENT OF LABOR RELATED ALLOCATOR
1009 ADMINISTRATIVE&GENERAL EXPENSES
1010 920/ADMINISTRATIVE&GENERAL SALARIES PTDCAS 53,511,744 51,204,117 2,307,628
1011 921/OFFICE SUPPLIES PTDCAS 228,890 219,019 9,871
1012 922/ADMIN&GENERAL EXPENSES TRANSFERRED-CR SUBEX 0 0 0
1013 923/OUTSIDE SERVICES PTDCAS 0 0 0
1014 924/PROPERTY INSURANCE 0
1015 PRODUCTION-STEAM L 121 0 0 0
1016 ALL RISK&MISCELLANEOUS P110P 378,934 363,177 15,757
1017
1018 925/INJURIES&DAMAGES LABOR 132,355 126,648 5,707
1019 926/EMPLOYEE PENSIONS&BENEFITS LABOR 0 0 0
1020 927/FRANCHISE REQUIREMENTS CIDA 0 0 0
1021 928/REGULATORY COMMISSION EXPENSES
1022 928.101/FERC ADMIN ASSESS&SECURITIES
1023 CAPACITY RELATED D10 0 0 0
1024 ENERGY RELATED E10 0 0 0
1025 928.101 I FERC ORDER 472 E99 0 0 0
1026 928.101/FERC MISCELLANIOUS L RESREV 0 0 0
1027 928.102 FERC RATE CASE RESREV 0 0 0
1028 928.104/FERC OREGON HYDRO RESREV 0 0 0
1029 SEC EXPENSES L 202 0 0 0
1030 928.202/IDAHO PUC -RATE CASE CIDA 0 0 0
1031 928.203/IDAHO PUC-OTHER CIDA 0 0 0
1032 928.301/OREGON PUC-FILING FEES CODA 0 0 0
1033 928.302/OREGON PUC-RATE CASE CODA 0 0 0
1034 928.303/OREGON PUC-OTHER CODA 0 0 0
1035 IPC/PUC JSS TRUE-UP ADJ PTD 0 0 0
1036 TOTAL ACCOUNT 928 0 0
1037 929/DUPLICATE CHARGES SUBEX 0 0 0
1038 930.1/GENERAL ADVERTISING RELAB 0 0 0
1039 930.2/MISCELLANEOUS EXPENSES PTDCAS 214,755 205,494 9,261
1040 931/RENTS L 200 0 0 0
1041 TOTAL ADM&GEN OPERATION 54,466,679 52,118,455 2,348,224
1042 PLUS:
1043 935/GENERAL PLANT MAINTENANCE P3908 1,038,440 994,452 43,988
1044 416/MERCHANDISING EXPENSE E10 0 0 0
1045 TOTAL OPER&MAINT EXPENSES 162,547,550 155,539,266 7,008,284
1046 TOTAL LABOR-RATIO(%) 100.00% 95.69% 4.31%
1047
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 30 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
1048 TABLE 14-ALLOCATION FACTORS
1049
1050 CAPACITY RELATED KW
1051 PRODUCTION RELATED COINCIDENT PEAKS @ GEN LEVEL D10 2,585,316 2,479,852 105,465
1052 SYSTEM TRANSMISSION SERVICE @ GENERATION LEVEL D11 2,585,316 2,479,852 105,465
1053 RETAIL TRANSMISSION SERVICE @ GENERATION LEVEL D12 2,585,316 2,479,852 105,465
1054 DISTRIBUTION SERVICE @ GENERATION LEVEL D60 2,431,714 2,339,615 92,099
1055
1056 ENERGY RELATED MWH
1057 GENERATION LEVEL(PSP) E10 16,783,429 16,039,716 743,713
1058 CUSTOMER LEVEL E99 15,740,718 15,039,426 701,292
1059
1060 CUSTOMER RELATED FACTORS
1061 902-CUSTOMER WEIGHTED CW902 1,819,788 1,576,198 243,590
1062 903-CUSTOMER WEIGHTED CW903 15,041,849 14,548,026 493,823
1063 904-CUSTOMER WEIGHTED CW904 2,751,851 2,564,962 186,889
1064 909-DIRECT ASSIGN-AVG.NO.CUST. DA909 610,567 590,862 19,705
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 31 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
1065 TABLE 14-ALLOCATION FACTORS
1066
1067 DIRECT ASSIGNMENTS (red font denotes allocator comes from Plant 1
1068 252-CUSTOMER ADVANCES DA252 13,139,360 13,043,126 96,234
1069 350-LAND&LAND RIGHTS DA350 0 0 0
1070 352-STRUCTURES&IMPROVEMENTS DA352 658 0 658
1071 353-STATION EQUIPMENT DA353 111,594 75,100 36,494
1072 354-TOWERS&FIXTURES DA354 0 0 0
1073 355-POLES&FIXTURES DA355 33,842 0 33,842
1074 356-OVERHEAD CONDUCTORS&DEVICES DA356 26,495 1,189 25,306
1075 359-ROADS&TRAILS DA359 0 0 0
1076 360LAND&LAND RIGHTS ACCT360 7,818,143 7,549,162 268,981
1077 360LAND&LAND RIGHTS-CIAC ACCT360CIAC 430,656 430,355 301
1078 361-STRUCTURES&IMPROVEMENTS ACCT361 52,245,201 49,776,238 2,468,963
1079 361-STRUCTURES&IMPROVEMENTS-CIAC ACCT361CIAC 8,009,324 7,447,616 561,708
1080 362-STATION EQUIPMENT ACCT362 300,357,806 287,706,828 12,650,978
1081 362-STATION EQUIPMENT-CIAC ACCT362CIAC 38,463,951 34,892,876 3,571,075
1082 364-POLES,TOWERS&FIXTURES-NET DA364 313,204,206 288,748,305 24,455,901
1083 365-OVERHEAD CONDUCTORS&DEVICES-NET DA365 155,253,318 146,384,826 8,868,492
1084 366-UNDERGROUND CONDUIT-NET DA366 52,785,315 51,958,505 826,810
1085 367-UNDERGROUND CONDUCTORS&DEVICES-NET DA367 318,155,073 313,429,461 4,725,612
1086 368-LINE TRANSFORMERS DA368 704,959,938 666,063,582 38,896,356
1087 369-DIRECT ASSIGNMENT DA369 67,920,301 65,262,678 2,657,623
1088 370-METERS DA370 112,940,727 109,292,546 3,648,181
1089 371-INSTALLATIONS ON CUSTOMER PREMISES-NET DA371 4,931,439 4,591,211 340,228
1090 373-STREET LIGHTING SYSTEMS-NET DA373 5,706,749 5,478,881 227,868
1091 451-REVENUE-MISCELLANEOUS SERVICE DA451 4,936,204 4,890,357 45,847
1092 454-REVENUE-FACILITIES CHARGE DA454 10,470,031 10,041,240 428,792
1093 908-OTHER CUSTOMER ASSISTANCE DA908 6,971,635 6,790,730 180,904
1094 440-RETAIL SALES REVENUE RETREV 5,491,025 5,491,025 0
1095 447-WHOLESALE SALES REVENUE RESREV 0 0 0
1096 456-REVENUE-STANDBY SERVICE DASTNBY 1 1 0
1097 440-REVENUE OFFSET FOR PLANT ADDITIONS DAREV 1 1 0
1098 IDAHO C I DA 1 1 0
1099 OREGON CODA 1 0 1
1100 NET TO GROSS TAX MULTIPLIER DA990 1.347 1.347 1.347
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 32 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
1101 TABLE 14-ALLOCATION FACTORS
1102
1103 INTERNALLY DEVELOPED ALLOCATION FACTORS
1104 PLANT-PROD,TRANS&DIST PTD 756,246,797 724,212,263 32,034,534
1105 LAB-PROD,TRANS,DIST,CUST ACCT&CSIS PTDCAS 107,042,430 102,426,358 4,616,072
1106 PLANT-HYDRO,OTHER,TSUBS,DSUBS&GP P110P 271,935,533 260,627,596 11,307,937
1107 PLANT-GEN PLT(390,391,397&398) P3908 29,201,032 27,964,079 1,236,953
1108 PLANT-PROD,TRANS,DIST&GEN P101 P 822,387,553 787,551,303 34,836,249
1109 O&M-PROD,TRANS,DIST,CUSTACCT&CSIS SUBEX 11,894,161 11,426,039 468,121
1110 LAB-PROD,TRANS,DIST,CUST ACCT&CSIS RELAB 271,935,533 260,627,596 11,307,937
1111 LAB-ALL LABOR WITHOUT 925-6 "CIRC LABOR 161,161,999 154,212,672 6,949,328
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 33 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
1112 TABLE 15-ALLOCATION FACTORS-RATIOS
1113
1114 CAPACITY RELATED KW
1115 PRODUCTION RELATED COINCIDENT PEAKS @ GEN LEVEL D10 100.00% 95.92% 4.08%
1116 SYSTEM TRANSMISSION SERVICE @ GENERATION LEVEL D11 100.00% 95.92% 4.08%
1117 RETAIL TRANSMISSION SERVICE @ GENERATION LEVEL D12 100.00% 95.92% 4.08%
1118 DISTRIBUTION SERVICE @ GENERATION LEVEL D60 100.00% 96.21% 3.79%
1119
1120 ENERGY RELATED MWH
1121 GENERATION LEVEL(PSP) E10 100.00% 95.57% 4.43%
1122 CUSTOMER LEVEL E99 100.00% 95.54% 4.46%
1123
1124 CUSTOMER RELATED FACTORS
1125 369-DIRECT ASSIGNMENT DA369 100.00% 96.09% 3.91%
1126 370-METERS DA370 100.00% 96.77% 3.23%
1127 902-CUSTOMER WEIGHTED CW902 100.00% 86.61% 13.39%
1128 903-CUSTOMER WEIGHTED CW903 100.00% 96.72% 3.28%
1129 904-CUSTOMER WEIGHTED CW904 100.00% 93.21% 6.79%
1130 909-DIRECT ASSIGN-AVG.NO.CUST. DA909 100.00% 96.77% 3.23%
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 34 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOC/ TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
1131 TABLE 15-ALLOCATION FACTORS-RATIOS
1132
1133 DIRECT ASSIGNMENTS
1134 252-CUSTOMER ADVANCES DA252 100.00% 99.27% 0.73%
1135 350-LAND&LAND RIGHTS DA350 #DIV/O! #DIV/O! #DIV/0I
1136 352-STRUCTURES&IMPROVEMENTS DA352 100.00% 0.00% 100.00%
1137 353-STATION EQUIPMENT DA353 100.00% 67.30% 32.70%
1138 354-TOWERS&FIXTURES DA354 #DIV/O! #DIV/O! #DIV/O!
1139 355-POLES&FIXTURES DA355 100.00% 0.00% 100.00%
1140 356-OVERHEAD CONDUCTORS&DEVICES DA356 100.00% 4.49% 95.51%
1141 359-ROADS&TRAILS DA359 #DIV/O! #DIV/O! #DIV/0!
1142 360LAND&LAND RIGHTS-DA DA360 100.00% 96.56% 3.44%
1143 360LAND&LAND RIGHTS-CIAC DA360C 100.00% 99.93% 0.07%
1144 361-STRUCTURES&IMPROVEMENTS-DA DA361 100.00% 95.27% 4.73%
1145 361-STRUCTURES&IMPROVEMENTS-CIAC DA361C 100.00% 92.99% 7.01%
1146 362-STATION EQUIPMENT-DA DA362 100.00% 95.79% 4.21%
1147 362-STATION EQUIPMENT-CIAC DA362C 100.00% 90.72% 9.28%
1148 364-POLES,TOWERS&FIXTURES-NET DA364 100.00% 92.19% 7.81%
1149 365-OVERHEAD CONDUCTORS&DEVICES-NET DA365 100.00% 94.29% 5.71%
1150 366-UNDERGROUND CONDUIT-NET DA366 100.00% 98.43% 1.57%
1151 367-UNDERGROUND CONDUCTORS&DEVICES-NET DA367 100.00% 98.51% 1.49%
1152 368-LINE TRANSFORMERS DA368 100.00% 94.48% 5.52%
1153 371-INSTALLATIONS ON CUSTOMER PREMISES-NET DA371 100.00% 93.10% 6.90%
1154 373-STREET LIGHTING SYSTEMS-NET DA373 100.00% 96.01% 3.99%
1155 451-REVENUE-MISCELLANEOUS SERVICE DA451 100.00% 99.07% 0.93%
1156 454-REVENUE-FACILITIES CHARGE DA454 100.00% 95.90% 4.10%
1157 908-OTHER CUSTOMER ASSISTANCE DA908 100.00% 97.41% 2.59%
1158 440-RETAIL SALES REVENUE RETREV 100.00% 100.00% 0.00%
1159 447-WHOLESALE SALES REVENUE RESREV #DIV/O! #DIV/O! #DIV/0I
1160 456-REVENUE-STANDBY SERVICE DASTNBY 100.00% 100.00% 0.00%
1161 440-REVENUE OFFSET FOR PLANT ADDITIONS DAREV 100.00% 100.00% 0.00%
1162 IDAHO CIDA 100.00% 100.00% 0.00%
1163 OREGON CODA 100.00% 0.00% 100.00%
1164 NET TO GROSS TAX MULTIPLIER DA990 1.347 1.347 1.347
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 35 of 36

IDAHO POWER COMPANY
JURISDICTIONAL SEPARATION STUDY
IDAHO REVENUE REQUIREMENT-INCREMENTAL 2024 RATEBASE AND LABOR
FOR THE TEST YEAR ENDING DECEMBER 31,2024
2 ALLOCI TOTAL IDAHO
3 DESCRIPTION SOURCE SYSTEM RETAIL OTHER
1165 TABLE 15-ALLOCATION FACTORS-RATIOS
1166
1167 INTERNALLY DEVELOPED ALLOCATION FACTORS
1168 PLANT-PROD,TRANS&DIST PTD 100.00% 95.76% 4.24%
1169 LAB-PROD,TRANS,DIST,CUST ACCT&CSIS PTDCAS 100.00% 95.69% 4.31%
1170 PLANT-HYDRO,OTHER,TSUBS,DSUBS&GP P110P 100.00% 95.84% 4.16%
1171 PLANT-GEN PLT(390,391,397&398) P3908 100.00% 95.76% 4.24%
1172 PLANT-PROD,TRANS,DIST&GEN P101 P 100.00% 95.76% 4.24%
1173 O&M-PROD,TRANS,DIST,CUST ACCT&CSIS SUBEX 100.00% 96.06% 3.94%
1174 LAB-PROD,TRANS,DIST,CUST ACCT&CSIS RELAB 100.00% 95.84% 4.16%
1175 LAB-ALL LABOR WITHOUT 925-6 "CIRC" LABOR 100.00% 95.69% 4.31%
Exhibit No.10
Case No.IPC-E-24-07
M.Larkin,IPC
2024 Page 36 of 36

Gust, Stacy
From: Larkin, Matt
Sent: Tuesday,June 18, 2024 4:51 PM
To: Mike Louis
Subject: Mathematical Ratio Example
Attachments: 5-Year Ratio Example.xlsx
Hi Mike,
Per our discussion earlier this afternoon,the attached spreadsheet details the math used to apply the historical CWIP vs.
closings ratio to YE 2023 CWIP in order to estimate 2024 closings.This is the method that was used to determine
expected closings in 2024 for projects less than $8 million.The numbers in there are just examples and won't tie directly
to the case.
As I mentioned I'll be out Thursday and Friday, but if you'd like to chat rate case methodology before then Tim will be
available. If not let's touch base on Monday when I'm back in office.
Thanks,
Matt
Matt Larkin
REVENUE REQUIREMENT MANAGER
Idaho Power I Regulatory Affairs
Office 208-388-2461
idahopower.com
1

From: Larkin,Matt
To: Mike Louis
Subject: Mathematical Ratio Example
Date: Tuesday,June 18,2024 4:51:00 PM
Attachments: 5-Year Ratio ExamDle.xlsx
Hi Mike,
Per our discussion earlier this afternoon, the attached spreadsheet details the math used to apply
the historical CWIP vs. closings ratio to YE 2023 CWIP in order to estimate 2024 closings. This is the
method that was used to determine expected closings in 2024 for projects less than $8 million. The
numbers in there are just examples and won't tie directly to the case.
As I mentioned I'll be out Thursday and Friday, but if you'd like to chat rate case methodology before
then Tim will be available. If not let's touch base on Monday when I'm back in office.
Thanks,
Matt
Matt Larkin
REVENUE REQUIREMENT MANAGER
Idaho Power I Regulatory Affairs
Office 208-388-2461
idahopower.com

From: Larkin,Matt
To: Mike Louis
Subject: Mathematical Ratio Example
Date: Tuesday,June 18,2024 4:51:00 PM
Attachments: 5-Year Ratio ExamDle.xlsx
Hi Mike,
Per our discussion earlier this afternoon, the attached spreadsheet details the math used to apply
the historical CWIP vs. closings ratio to YE 2023 CWIP in order to estimate 2024 closings. This is the
method that was used to determine expected closings in 2024 for projects less than $8 million. The
numbers in there are just examples and won't tie directly to the case.
As I mentioned I'll be out Thursday and Friday, but if you'd like to chat rate case methodology before
then Tim will be available. If not let's touch base on Monday when I'm back in office.
Thanks,
Matt
Matt Larkin
REVENUE REQUIREMENT MANAGER
Idaho Power I Regulatory Affairs
Office 208-388-2461
idahopower.com

2018 2019 2020 2021 2022 2023
Year End CWIP Balance $475 $550 $600 $655 $775
Actual Project Closings $200 $250 $210 $280 $300
%of Actual Closings vs.Prior Year CWIP 42% 45% 35% 43% 39%
5-Year Ratio Example(002).xlsx
5 Year Ratio Example Page 1 of 1 7/2/2024 8:41 AM