20260413Notice_of_Petition_Order_No_36998.pdf

Office of the Secretary
Service Date
April 13,2026
BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF IDAHO POWER ) CASE NO. IPC-E-26-07
COMPANY'S PETITION TO EVALUATE )
CLASS COST-OF-SERVICE ) NOTICE OF PETITION
METHODOLOGY, CONSIDER )
ALTERNATIVE CLASS COST-OF-SERVICE ) NOTICE OF INTERVENTION
STUDIES,AND DETERMINE COST OF ) DEADLINE
SERVICE CONSIDERATIONS FOR NEW )
LARGE-LOAD CUSTOMERS ) ORDER NO. 36998
On March 31, 2026, Idaho Power Company ("Company") petitioned the Idaho Public
Utilities Commission ("Commission") requesting to initiate a docket to evaluate and develop a
record on the Company's Class Cost-of-Service ("CCOS") methodology including consideration
of alternative methodologies ("Petition").
The Commission now issues this Notice of Petition and sets deadlines by which interested
persons may intervene.
NOTICE OF PETITION
YOU ARE HEREBY NOTIFIED that the Company requests that the Commission open a
dedicated docket to evaluate its CCOS methodology, as directed by Order No. 36892 and the prior
settlement in its 2025 General Rate Case (Case No. IPC-E-25-16). Petition at 1-2. The request is
not for rate changes or approval of a specific methodology, but rather to establish a single-issue
proceeding to develop a comprehensive evidentiary record and examine both the Company's
current CCOS approach and potential alternatives.Id. at 3.
YOU ARE FURTHER NOTIFIED that the Company's current 2025 CCOS methodology
follows a traditional cost-of-service framework involving functionalization, classification, and
allocation of costs based on system use and cost drivers such as demand, energy consumption, and
customer-related activities.Id. at 10.
YOU ARE FURTHER NOTIFIED that the Company presents four alternative
methodologies—Energy and Fixed Cost Allocation Classification ("EFAC"), Average Excess
Demand with four coincident peaks ("AED-4CP"), Hourly-Informed, and EFAC Production and
Transmission Load-Factor Classification ("P&T")—each varying in how costs are classified and
NOTICE OF PETITION
NOTICE OF INTERVENTION DEADLINE
ORDER NO. 36998 1

allocated, particularly for production and transmission. Id. at 14-19. The Petition includes
supporting materials as Attachments, including workpapers and process guides, to allow
stakeholders to assess the implications of each method.
YOU ARE FURTHER NOTIFIED that the Company identifies emerging challenges
associated with large, concentrated load growth—such as data centers and industrial customers—
which may significantly impact system planning and cost allocation. Id. at 22. The Company
outlines existing tools like Energy Services Agreements, direct assignment of customer-specific
infrastructure costs,and potential growth-sensitive cost allocation frameworks to manage risks and
ensure fairness. Id. at 23-25.
YOU ARE FURTHER NOTIFIED that the Company met with Commission Staff and
interested parties on February 13,2026,to solicit pre-filing comments.Id. at 27. These discussions
raised several themes including the need for greater transparency, improved comparability across
methodologies, consideration of both demand- and energy-related cost drivers for transmission
and production, inclusion of hourly or more granular data, new large loads and non-homogenous
growth, and evaluation of alternative treatments for purchased power.Id. at 27-29.
YOU ARE FURTHER NOTIFIED that the Petition and attachments are available for
public inspection during regular business hours at the Commission's office. The Application and
attachments 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
NOTICE OF PETITION
NOTICE OF INTERVENTION DEADLINE
ORDER NO. 36998 2

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
and assigns exhibit numbers to each party. 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 Timothy Tatum
Lisa Lance Grant T. Anderson
IPC Dockets 1221 West Idaho Street(83702)
1221 West Idaho Street(83702) P.O. Box 70
P.O. Box 70 Boise, ID 83707
Boise, ID 83707 ttatum(a),idahopower.com
mgoicoecheaallengidahopower.com ganderson(kidahopower.com
llancegidahopower.com
dockets kidahopower.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.See 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 PETITION
NOTICE OF INTERVENTION DEADLINE
ORDER NO. 36998 3

DONE by Order of the Idaho Public Utilities Commission at Boise, Idaho this 13th day of
April, 2026.
G
EDWARD LODGE, PR „ DENT
/I,—- gt��
JO R. HAMMOND JR., COMMISSIONER
DAYN HAKDIE, COMMISSIONER
ATTEST:
1 149�
MQ'iA BRTdo nchez
Commission Secretary
I:\Legal\ELECTRIC\IPC-E-26-07_CCOS\orders\IPCE2607_ntc_pet_int_em.docx
NOTICE OF PETITION
NOTICE OF INTERVENTION DEADLINE
ORDER NO. 36998 4