20231129IPC to Staff Supplemental 20.pdf

LISA D. NORDSTROM
Lead Counsel
[e-mail]

November 29, 2023

VIA ELECTRONIC EMAIL

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-23-23
Idaho Power Company’s 2023 Integrated Resource Plan

Dear Commission Secretary:

Enclosed for electronic filing, please find Idaho Power Company’s Supplemental
Response to the First Production Request of Commission Staff.

If you have any questions about the attached filing, please do not hesitate to
contact me.

Very truly yours,

Lisa D. Nordstrom
LDN:cd
Attachments
RECEIVED
2023 NOVEMBER 29, 2023 4:59PM
IDAHO PUBLIC
UTILITIES COMMISSION
IDAHO POWER COMPANY’S SUPPLEMENTAL RESPONSE TO THE FIRST PRODUCTION REQUEST
OF THE COMMISSION STAFF- 1
LISA D. NORDSTROM (ISB No. 5733)
MEGAN GOICOECHEA ALLEN (ISB No. 7623)
Idaho Power Company
1221 West Idaho Street (83702)
P.O. Box 70
Boise, Idaho 83707
Telephone: [phone]
[e-mail]
[e-mail]

Attorneys for Idaho Power Company

BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION

IN THE MATTER OF IDAHO POWER
COMPANY’S 2023 INTEGRATED
RESOURCE PLAN.
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CASE NO. IPC-E-23-23

IDAHO POWER COMPANY’S
SUPPLEMENTAL RESPONSE TO
THE FIRST PRODUCTION
REQUEST OF THE COMMISSION
STAFF

COMES NOW, Idaho Power Company (“Idaho Power” or “Company”), and in
response to the First Production Request of the Commission Staff (“Commission” or
“Staff”) dated November 3, 2023, herewith submits the following supplemental
information:

IDAHO POWER COMPANY’S SUPPLEMENTAL RESPONSE TO THE FIRST PRODUCTION REQUEST
OF THE COMMISSION STAFF- 2
STAFF REQUEST FOR PRODUCTION NO. 20: Please provide a table similar to
Table 10.7 - July Peak Hour and Resource Balance as shown in the 2021 IRP on pages
142-143, updated for the 2023 IRP.
SUPPLEMENTAL RESPONSE TO STAFF’S REQUEST FOR PRODUCTION
NO. 20:
As noted on pages 173-174 of the 2023 Integrated Resource Plan (“IRP”), annual
capacity positions have replaced the Load and Resource Balance (“L&RB”) table that
existed in prior IRPs. As discussed in the MATLAB workshop with Staff on August 21,
2023, as well as various IRP Advisory Council meetings, Idaho Power has transitioned to
using the Loss of Load Expectation (“LOLE”) methodology to assess system reliability via
the internally developed Reliability & Capacity Assessment Tool (“RCAT”). RCAT is
capable of producing annual capacity positions for any given year and Effective Load
Carrying Capabilities (“ELCCs”) for any Variable Energy Resource and Energy Limited
Resource. The Company’s current approach involves determining capacity positions
based on loss of load probabilities calculated for every hour in a calendar year. This
approach is not comparable to the prior approach for developing the L&RB table, which
was based on a deterministic peak-hour view.
While the old L&RB table cannot be recreated in its prior form, Idaho Power
recognizes it provided digestible insight into the capacity contribution of its existing
resources and the contribution of the Preferred Portfolio to the ultimate capacity positions
in the IRP. In consultation with Staff, Idaho Power developed the attached spreadsheet,
which includes an L&RB view for the two analyses presented in Table 11.15 of the 2023
IRP. Please note that only the annual capacity positions are relevant to the 2023 IRP; the

IDAHO POWER COMPANY’S SUPPLEMENTAL RESPONSE TO THE FIRST PRODUCTION REQUEST
OF THE COMMISSION STAFF- 3
ELCCs and Planning Reserve Margins were developed specifically to provide a detailed
resource view and were not utilized in AURORA to develop portfolios.
The supplemental response to this Request is sponsored by Jared Hansen,
Resource Planning Leader, Idaho Power Company.

IDAHO POWER COMPANY’S SUPPLEMENTAL RESPONSE TO THE FIRST PRODUCTION REQUEST
OF THE COMMISSION STAFF- 4

DATED at Boise, Idaho, this 29th day of November 2023.

LISA NORDSTROM
Attorney for Idaho Power Company

IDAHO POWER COMPANY’S SUPPLEMENTAL RESPONSE TO THE FIRST PRODUCTION REQUEST
OF THE COMMISSION STAFF- 5
CERTIFICATE OF SERVICE

I HEREBY CERTIFY that on the 29th day of November 2023, I served a true and
correct copy of Idaho Power Company’s Supplemental Response to the First Production
Request of the Commission Staff upon the following named parties by the method
indicated below, and addressed to the following:

Commission Staff
Chris Burdin
Deputy Attorney General
Idaho Public Utilities Commission
11331 W. Chinden Blvd., Bldg No. 8,
Suite 201-A (83714)
PO Box 83720
Boise, ID 83720-0074

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Micron Technology, Inc.
Austin Rueschhoff
Thorvald A. Nelson
Austin W. Jensen
Holland & Hart, LLP
555 Seventeenth Street, Suite 3200
Denver, Colorado 80202

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[e-mail]

Jim Swier
Micron Technology, Inc.
8000 South Federal Way
Boise, Idaho 83707
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FAX
FTP Site
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________________________________
Christy Davenport
Legal Administrative Assistant

BEFORE THE

IDAHO PUBLIC UTILITIES COMMISSION

CASE NO. IPC-E-23-23

IDAHO POWER COMPANY

ATTACHMENT 1

SEE EXCEL SPREADSHEET