20250811Notice_of_Application_Order_No36706.pdf

Office of the Secretary
Service Date
August 11,2025
BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF IDAHO POWER ) CASE NO. IPC-E-25-23
COMPANY'S 2025 INTEGRATED )
RESOURCE PLAN ) NOTICE OF APPLICATION
NOTICE OF INTERVENTION
DEADLINE
ORDER NO. 36706
On June 27, 2025, Idaho Power Company ("Company") applied to the Idaho Public
Utilities Commission ("Commission") requesting that the Commission issue an order
acknowledging the Company's 2025 Integrated Resource Plan ("IRP") ("Application"). The
Company submits an IRP to the Commission every two years, as directed by Order No. 22299,
Case No. U-1500-165. With this Order, the Commission provides notice that the Company has
filed the Application requesting acknowledgment of its 2025 IRP and sets deadlines for interested
persons to petition to intervene in the case.
NOTICE OF APPLICATION
YOU ARE HEREBY NOTIFIED that the Company states that the 2025 IRP represents a
comprehensive analysis of the optimal mix of both demand- and supply-side resources available
to reliably serve customer demand and flexible capacity needs from 2026 to 2045. Application at
1-2. According to the Company, it used Energy Exemplar's Aurora Long-Term Capacity
Expansion modeling tool to develop portfolios that are least-cost, least-risk for a variety of
alternative future scenarios. Id. at 2.
YOU ARE FURTHER NOTIFIED that the Company represents that the primary goals of
the 2025 IRP are to:
(1) identify sufficient resources to reliably serve the growing demand for energy
within Idaho Power's service area throughout the 20-year planning period (2026-
2045); (2) ensure the selected Preferred Portfolio balances cost and risk, while
adhering to environmental regulations; (3) give equal and balanced treatment to
supply-side resources, demand-side measures, and transmission resources; and (4)
involve the public in the planning process in a meaningful way.
NOTICE OF APPLICATION
NOTICE OF INTERVENTION DEADLINE
ORDER NO. 36706 1

Id. at 4.
YOU ARE FURTHER NOTIFIED that the Company states that two notable trends
emerged in the 2025 IRP: the essential need for flexible resources and additional transmission, and
the precariousness of additional load growth stemming from the heightened uncertainty
surrounding state and federal policy.Id. at 9.
YOU ARE FURTHER NOTIFIED that the Company represents that it identified key
branches to evaluate in additional detail, and the Company required the model to build portfolios
both with and without each branch. Id. at 11-12. The Company states that the most impactful
contingency scenario analyzed under the IRP is the potential repeal of the 2024-revised
Environmental Protection Agency Rule I I I(d) regarding carbon emissions for existing and new
resources. Id.
YOU ARE FURTHER NOTIFIED the Company represents that, based on its analysis, it
selected a Preferred Portfolio, which it characterizes as an assorted mixture of generation
resources, energy storage systems, and transmission lines. Id. at 12. The Company states that this
Preferred Portfolio is the least-cost, least-risk option that incorporates positive changes toward
clean, low-cost resources without compromising system reliability.Id.
YOU ARE FURTHER NOTIFIED that the Company states that its Preferred Portfolio adds
"1,445 [megawatts ("MW")] of solar, 885 MW of storage (4hour batteries, as well as 50 MW of
long duration 100-hour storage), 700 MW of wind, 550 MW of new gas, 344 MW of incremental
energy efficiency, and 20 MW of incremental demand response." Id. at 3. Additionally, the
Company represents that the Preferred Portfolio involves the conversion of multiple coal-fired
generation units, capable of 484 MW,to natural gas and adds a total of 611 MW of natural gas via
the conversions through 2045.Id.
YOU ARE FURTHER NOTIFIED the Company represents that, in total, the Preferred
Portfolio adds 4,071 MW of incremental resource capacity over the 20-year planning period,
including the Boardman to Hemingway transmission line as of December 2027; the Southwest
Intertie Project-North transmission line as of November 2028; and the Midpoint—Hemingway#2
500 kilovolt with the first phase in 2028 and the second phase in 2030. Id.
YOU ARE FURTHER NOTIFIED that the 2025 IRP contains the Company's Near-Term
Action Plan that reflects near-term actionable items of the Preferred Portfolio necessary to
NOTICE OF APPLICATION
NOTICE OF INTERVENTION DEADLINE
ORDER NO. 36706 2

successfully position the Company to provide reliable and economic service to its customers into
the future. Id. at 12.
YOU ARE FURTHER NOTIFIED that the Company represents that in advance of
finalizing the 2025 IRP, it held a series of four technical workshops for the purpose of addressing
Staff s areas of concern regarding the 2023 IRP. Id. at 14. The Company believes the workshops
successfully resolved Staff s previous concerns, including: "(1) future resource costs and Aurora
resource selection; (2) Aurora resource selection and Aurora dispatch; (3) interconnection costs,
REC price forecasts, and load percentile methodology; and(4) the timing of highest risk."Id.
YOU ARE FURTHER NOTIFIED that the Application, IRP, and appendices are available
for public inspection during regular business hours at the Commission's office. These documents
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
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.
NOTICE OF APPLICATION
NOTICE OF INTERVENTION DEADLINE
ORDER NO. 36706 3

YOU ARE FURTHER NOTIFIED that the following people are designated as the
Company's representatives in this matter:
Megan Goicoechea Allen Timothy Tatum
Donovan E. Walker Riley Maloney
Idaho Power Company Micah Babbitt
P.O. Box 70 P.O. Box 70
Boise, Idaho 83707 Boise, ID 83707
mgoicoecheaallen&idahopower.com ttatum&idahopower.com
dwalker(d),idahopower.com rmaloney(a),idahopower.com
dockets&idahopower.com mbabbitt&idahopower.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 APPLICATION
NOTICE OF INTERVENTION DEADLINE
ORDER NO. 36706 4

DONE by Order of the Idaho Public Utilities Commission at Boise, Idaho this 11ffi day of
August, 2025.
G
Gv4
E WARD LODGE, P SID T
R. HAMMOND JR., COMMISSIONER
1
DAYN HA E, COMMISSIONER
ATTEST:
M A Va b a -S 6A ez
Commission Secretary
1ALegal\ELECTRIC\IPC-E-25-23_IRP\orders\ntc_app_int jl.docx
NOTICE OF APPLICATION
NOTICE OF INTERVENTION DEADLINE
ORDER NO. 36706 5