20260914Notice_of_Application_Order_No_37160.pdf

Office of the Secretary
Service Date
September 14,2026
BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF IDAHO POWER ) CASE NO. IPC-E-26-23
COMPANY'S APPLICATION FOR )
APPROVAL OF REVISED DEPRECIATION ) NOTICE OF APPLICATION
RATES FOR ELECTRIC PLANT-IN- )
SERVICE AND REQUEST FOR ) NOTICE OF INTERVENTION
ACCOUNTING ORDER ) DEADLINE
ORDER NO. 37160
On August 19, 2026, Idaho Power Company ("Company") applied to the Idaho Public
Utilities Commission ("Commission") requesting an order: (1) approving updated depreciation
rates for electric plant-in-service, resulting in an annual increase of approximately $32.3 million
from the depreciation expense currently approved in customer rates,effective January 1,2028; and
(2) authorizing amortization accounting treatment for new accounts established as a result of
Federal Energy Regulatory Commission("FERC") Order No. 898 ("Application"). The Company
requests an order by mid-February 2027.
The Commission now issues this Notice of the Company's Application and Notice of
Intervention Deadline establishing a 21-day intervention period.
NOTICE OF APPLICATION
YOU ARE HEREBY NOTIFIED that the Company states that its currently approved
depreciation rates went into effect on January 1, 2022, and are based on electric plant-in-service
as of December 31, 2020. Application at 2.
YOU ARE FURTHER NOTIFIED that the Company's newly proposed depreciation rates
are based on a depreciation study of its electric plant-in-service as of December 31, 2025. Id.
According to the Company,the depreciation study developed annual depreciation accrual rates on
an account and subaccount basis and determined appropriate average service lives along with net
salvage percentages.Id. at 3.The proposed depreciation rates are based on straight-line,remaining-
life method and the average service-life procedure.Id.
YOU ARE FURTHER NOTIFIED that for plant accounts and assets subject to FERC
Order No. 898—which established new Uniform System of Accounts functional accounts and
NOTICE OF APPLICATION
NOTICE OF INTERVENTION DEADLINE
ORDER NO. 37160 1

accounting treatment, effective January 1, 2025—the depreciation study used straight-line,
remaining-life amortization.Id.
YOU ARE FURTHER NOTIFIED that if applied to current plant-in-service,the Company
expects the proposed depreciation rates to result in an annual increase of approximately $32.3
million from the depreciation expense currently approved in customer rates.
YOU ARE FURTHER NOTIFIED that the Company is not seeking a change in retail
electric rates in this proceeding and instead intends to incorporate the approved depreciation rates
in either a 2027 general rate case or a separate 2027 application to change retail rates to reflect the
updated annual depreciation expense.Id. at 1-2.
YOU ARE FURTHER NOTIFIED that the Company requests an accounting order
allowing amortization accounting for specific accounts and subaccounts resulting from FERC
Order No. 898. Id. at 6. According to the Company, this accounting treatment is consistent with
Commission Order No. 26938 in Case No. IPC-E-97-04.Id. at 7-8.
YOU ARE FURTHER NOTIFIED that the Application, Attachment, and Direct
Testimony are available for public inspection during regular business hours at the Commission's
office. The Application,Attachment,and Direct Testimony are also available on the Commission's
website at www.puc.idaho.gov. Click on the "ELECTRIC" icon, select "Open Cases," and click
on the case number as shown on the front of this document.
YOU ARE FURTHER NOTIFIED that all proceedings in this case will be held pursuant
to the Commission's jurisdiction under Title 61 of the Idaho Code, and that all proceedings in this
matter will be conducted pursuant to the Commission's Rules of Procedure, IDAPA 31.01.01.000
et seq.
NOTICE OF INTERVENTION DEADLINE
YOU ARE FURTHER NOTIFIED that persons desiring to intervene in this matter to
obtain parties' rights of participation must file a Petition to Intervene with the Commission
pursuant to this Commission's Rules of Procedure 72 and 73, IDAPA 31.01.01.072 and -.073.
Persons who wish to intervene as a party must file a Petition to Intervene no later than 21
days after the date of service of this Order. Such persons shall also provide the Commission
Secretary with their email address to facilitate further communications. After the intervention
deadline runs, the Commission Secretary shall issue a Notice of Parties that identifies the parties
NOTICE OF APPLICATION
NOTICE OF INTERVENTION DEADLINE
ORDER NO. 37160 2

and assigns exhibit numbers to each parry. Once the Notice of Parties has issued, Commission
Staff shall informally confer with the Company and any intervening parties about how to further
process this case and shall then report back to the Commission on a proposed case schedule.
YOU ARE FURTHER NOTIFIED that persons who would like to present their views
without parties' rights of participation and cross-examination do not have to intervene but may
present their views by submitting written comments to the Commission.
YOU ARE FURTHER NOTIFIED that the following people are designated as the
Company's representatives in this matter:
Megan Goicoechea Allen Tim Tatum
Donovan E. Walker Connie Aschenbrenner
Regulatory Dockets Kelley Noe
Idaho Power Company Idaho Power Company
1221 West Idaho Street (83702) 1221 West Idaho Street(83702)
P.O. Box 70 P.O. Box 70
Boise, Idaho 83707 Boise, Idaho 83707
mgoicoecheaallengidahopower.com ttatum(kidahopower.com
dwalker(kidahopower.com caschenbrenner(cr�,idahopower.com
dockets(i-6dahopower.com knoe ckidahopower.com
ORDER
IT IS HEREBY ORDERED that persons desiring to intervene in this matter must file a
Petition to Intervene no later than 21 days from the service date of this Order. Once the deadline
has passed, the Commission Secretary shall prepare and issue a Notice of Parties.
IT IS FURTHER ORDERED that, after the Notice of Parties has issued,Commission Staff
shall confer with the parties regarding a procedural schedule for this matter including,if necessary,
a hearing in this matter.
IT IS FURTHER ORDERED that parties comply with Order No. 35375, issued April 21,
2022. Generally, all pleadings should be filed with the Commission electronically and will be
deemed timely filed when received by the Commission Secretary. Rule 14.02. Service between
parties should continue to be accomplished electronically when possible. However, voluminous
discovery-related documents may be filed and served on CD-ROM or a USB flash drive.
NOTICE OF APPLICATION
NOTICE OF INTERVENTION DEADLINE
ORDER NO. 37160 3

DONE by Order of the Idaho Public Utilities Commission at Boise, Idaho this 14th day of
September 2026.
G
EDWARD LODGE, PR F19IDENT
J R. HAMMOND JR., COMMISSIONER
DAYN HA IE, COMMISSIONER
ATTEST:
3 do i a a n c h e z
Commission Secretary
I:\Legal\ELECTRIC\IPC-E-26-23\orders\IPCE2623_ntc_app_int jl.docx
NOTICE OF APPLICATION
NOTICE OF INTERVENTION DEADLINE
ORDER NO. 37160 4