20260515Reply Comments.pdf

ROCKY MOUNTAIN 1407 W.North Temple,Suite 330
POWER. Salt Lake City,UT 84116
A DIVISION OF PACIFICORP RECEIVED
MAY 15, 2026
May 15, 2026 IDAHO PUBLIC
UTILITIES COMMISSION
VIA ELECTRONIC DELIVERY
Commission Secretary
Idaho Public Utilities Commission
11331 W. Chinden Blvd
Building 8 Suite 201A
Boise, ID 83714
RE: CASE NO. PAC-E-26-05
IN THE MATTER OF ROCKY MOUNTAIN POWER'S APPLICATION
REQUESTING APPROVAL TO RECOVER$4.1 MILLION ASSOCIATED WITH
THE ECAM DEFERRAL AND REFUND $1.4 MILLION
Attention: Commission Secretary
Pursuant to Commission Order No. 37006 providing public notice of the Company's Application,
authorizing the processing of the Application by Modified Procedure, and establishing the
procedural schedule please find Rocky Mountain Power's Reply Comments in the above
referenced matter.
Informal inquiries may be directed to Jana Saba, Director of Regulation, at(801) 220-2823.
Very truly yours,
bA 9�� n
Joelle Steward
Senior Vice President, Regulation
Enclosure

Joe Dallas (ISB# 10330)
PacifiCorp, Senior Attorney
825 NE Multnomah Street, Suite 2000
Portland, OR 97232
Email:joseph.dallaskpacificorp.com
Attorney for Rocky Mountain Power
BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF ROCKY MOUNTAIN ) CASE NO. PAC-E-26-05
POWER'S APPLICATION REQUESTING )
APPROVAL TO RECOVER$4.1 MILLION ) REPLY COMMENTS OF
ASSOCIATED WITH THE ECAM ) ROCKY MOUNTAIN POWER
DEFERRAL AND REFUND $1.4 MILLION )
Pursuant to Rule 202.01(d) of the Rules of Procedure of the Idaho Public Utilities
Commission("Commission") and the Commission's April 20, 2026,Notice of Application and of
Modified Procedure, Rocky Mountain Power a division of PacifiCorp (the "Company") hereby
submits reply comments in the above-referenced case.
I. BACKGROUND
1. On April 1, 2026, the Company applied for Commission authorization to adjust its
rates under the Energy Cost Adjustment Mechanism ("ECAM") and requested approval of
approximately $4.1 million in deferred costs from the deferral period beginning January 01,2025,
through December 31, 2025, with a 0.7% percent overall decrease to Electric Service Schedule
No. 94, Energy Cost Adjustment ("Schedule 94"). The Company also sought authorization to
return $1.4 million in renewable energy credit("REC") revenue to customers under Schedule No.
98, REC Revenue Adjustment ("Schedule 98")—and a corresponding 0.4% decrease in rates.
2. On April 20, 2026, Commission Order No. 37006 provided public notice of the
Company's Application, authorized processing of the Application by Modified Procedure, and
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established the procedural schedule allowing persons who would like to file written comments to
have until May 8, 2026, and the Company having until May 15, 2026, to file reply comments.
3. On May 8, 2026, Commission Staff("Staff') filed comments with the following
recommendation: (1)Approve recovery of the $4.1 million ECAM deferral balance; (2)Approve
the return of$1.4 million in REC revenues through the RRA; (3)Approve Schedules 94 and 98
rates as filed, with an effective date of June 1, 2026; and (4) Accept the late-filed customer
comments
II. REPLY TO STAFF COMMENTS
4. PacifiCorp appreciates Staff's efforts and the thorough review provided in its
comments submitted to the docket. In particular, PacifiCorp is especially appreciative of the
comprehensive and detailed analysis of its filing presented in Staff's analysis. The Company
collaborated with Staff throughout the evaluation process and agrees with the recommendations
provided.
5. Consistent with prior practice, Commission Staff began its in-depth review of this
filing in January 2026 with an audit request seeking the Company's ECAM calculations, hedging
reports, internal audit report,hourly generation logs, and other information relevant to the ECAM.
During the week of April 6t', Staff met with Company experts on multiple occasions to discuss the
Company's coal contracts and coal supply, 2025 planned and plant outages, and the Company's
market bidding and benefits from participating in the Western Energy Imbalance Market
("WEIM").
III. REQUEST FOR RELIEF
6. PacifiCorp request that the Commission adopt the recommendation provided in
Staff comments, which consistent of the following:
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(1)Approve recovery of the $4.1 million ECAM deferral balance;
(2)Approve the return of$1.4 million in REC revenues through the RRA;
(3)Approve Schedules 94 and 98 rates as filed, with an effective date of June 1, 2026; and
(4)Accept the late-filed customer comments
DATED this 15t'day of May, 2026.
Respectfully submitted,
ROCKY MOUNTAIN POWER
v
Joe Dallas (ISB# 10330)
PacifiCorp,Assistant General Counsel
825 NE Multnomah Street, Suite 2000
Portland, OR 97232
Email: joseph.dallas(aa�pacificorp.com
Attorney for Rocky Mountain Power
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