20250731Q1 Cover Letter 3-2025.pdf

11
Avista Corp.
1411 East Mission P.O. Box 3727
Spokane, Washington 99220-0500
Telephone [phone]
Toll Free 800-727-9170
April 15, 2025
Monica Barrios-Sanchez
Commission Secretary
Idaho Public Utilities Commission
11331 W. Chinden Blvd. Bldg. 8 Suite 201-A
Boise, Idaho 83714
Dear Commission Secretary,
Purchase Cost Adjustment (PCA)Report for the Quarter Ended March 2025
Pursuant to Order No. 36339, enclosed is an electronic copy of Avista's electric Power Cost
Adjustment(PCA)report for quarter ended March 31, 2025.
As identified within the Order, the Company is including two additional files:
1. Attachment A—Q 1 2025 -Power Transaction Register("PTR")
2. Attachment B—Q 1 2025 - Gas Accounting Data Download("GADD")
The provided attachments contain TRADE SECRET, PROPRIETARY or CONFIDENTIAL
information and are filed under IDAPA 31.01.01, Rule 067 and 233, and Section 9-340D, Idaho
Code.
For the quarter ended March 31, 2025, total power supply expenses were lower than authorized
for the Idaho jurisdiction by $403,6291 as shown on page 36 (line 352) of the attached report. For
the January 2025 through March 2025 PCA reporting period, when including the impact of the
EIM O&M deferral, WA 1-937 renewable energy credit benefits, and interest the total deferral is
currently a rebate of$8,222,189 (page 34).
If you have any questions,please contact Ryan Finesilver at [phone].
1 Excluding adjustments related to EIM expenses
2 Total of January,February,and March values on line 35.

Sincerely,
IS/Patrick D. El-w-b-cw
Patrick D. Ehrbar
Director of Regulatory Affairs