20250731APPLICATION.pdf

RECEIVED
Avista Corp. I AHO PUBLIC
1411 East Mission P.O. Box 3727 UTILITIES COMMISSION
Spokane, Washington 99220-0500
Telephone [phone]
Toll Free 800-727-9170
July 31, 2025
State of Idaho
Idaho Public Utilities Commission
11331 W. Chinden Blvd
Bldg 8 Suite 201-A
Boise, ID 83714
RE: Case No. AVU-E-25-09 - Residential Exchange Annual Rate Adjustment Filing of
Avista Corporation
Dear Commission Secretary:
Enclosed for filing with the Commission is Avista Corporation's dba Avista Utilities ("Avista or
the Company") Application requesting approval of changes to the Company's Residential and
Small Farm Tariff Schedule 59. The following tariff sheets are proposed for revision:
Twenty Fourth Revision Sheet 59 canceling Twenty Third Revision Sheet 59
Please direct any questions regarding this filing to Athena Allen at(509) 495-8325.
Sincerely,
Director of Regulatory Affairs
Pat.Ehrbar(d),avistacorp.corn

I DAVID J. MEYER
2 VICE PRESIDENT AND CHIEF COUNSEL FOR
3 REGULATORY AND GOVERNMENTAL AFFAIRS
4 AVISTA CORPORATION
5 1411 E. MISSION AVENUE
6 P. O. BOX 3727
7 SPOKANE, WASHINGTON 99220
8 PHONE: [phone], FAX: [phone]
9 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
10
11 IN THE MATTER OF THE RESIDENTIAL )
12 AND SMALL FARM ANNUAL RATE ) CASE NO. AVU-E-25-09
13 ADJUSTMENT FILING OF ) APPLICATION OF AVISTA
14 AVISTA CORPORATION ) CORPORATION
15
16
17
18 I. INTRODUCTION
19 In accordance with Idaho Code §61-502 and Idaho Public Utilities Commission
20 Modified Procedure Rule (RP) 052,Avista Corporation, doing business as Avista Utilities
21 (hereinafter "Avista" or "Company"), at 1411 East Mission Avenue, Spokane,
22 Washington, respectfully makes application to the Idaho Public Utilities Commission
23 ("Commission")for an order authorizing Avista to implement Residential and Small Farm
24 Energy rates for electric service from October 1, 2025 through September 30, 2026. The
25 proposed Residential and Small Farm Energy Rate Adjustment credit rate for rate
26 schedules 1, 12, 22, 32, and 48 is 0.2330 per kilowatt-hour. The credit rate represents a
27 $1.9 million increase to qualifying customers. The Company has requested an October 1,
28 2025 effective date.
29 The Company requests that this filing be processed under the Commission's
30 Modified Procedure Rules(RP 201-204). Communications in reference to this Application
AVISTA'S ELECTRIC RESIDENTIAL AND SMALL FARM ANNUAL RATE
ADJUSTMENT FILING PAGE 1

I should be addressed to:
2 David J. Meyer, Esq.
3 Vice President and Chief Counsel for
4 Regulatory & Governmental Affairs
5 Avista Corporation
6 P.O. Box 3727
7 MSC-10
8 1411 E. Mission Ave
9 Spokane, WA 99220-3727
10 Phone: [phone]
11 [e-mail]
12
13 Patrick Ehrbar
14 Director of Regulatory Affairs
15 Avista Utilities
16 P.O. Box 3727
17 MSC-27
18 1411 E. Mission Ave
19 Spokane, WA 99220-3727
20 Phone: [phone]
21 [e-mail]
22
23 II. BACKGROUND
24 The electric Residential and Farm Energy Rate Adjustment results from an
25 Agreement between the Company and Bonneville Power Administration (`BPA"). The
26 Residential Exchange Program ("Residential Exchange" or"ResEx") provides a share of
27 the benefits of the federal Columbia River power system to the residential and small-farm
28 customers of the six(6)investor-owned utilities of the Pacific Northwest,including Avista.
29
30 III. DRIVERS OF THE RESIDENTIAL AND SMALL FARM ENERGY RATE
31 ADJUSTMENT CREDIT
32
33 Under the current Residential Exchange rate adjustment, approximately $5.1
34 million annually is being passed through to applicable Idaho customers through a uniform
AVISTA'S ELECTRIC RESIDENTIAL AND SMALL FARM ANNUAL RATE
ADJUSTMENT FILING PAGE 2

1 0.366¢ per kilowatt-hour rate credit. This rate was approved by the Idaho Public Utilities
2 Commission effective October 1, 2023 in Order No. 35932.
3 The proposed rate credit of 0.2330 per kilowatt-hour is designed to pass through
4 approximately $3.3 million which represents the Idaho portion of the annual level of BPA
5 benefits, offset by the balance remaining from the prior year. The level of BPA benefits is
6 approximately $1.9 million less than what is currently being passed back to customers in
7 rates today. That amount, however, is offset by an under-refunded balance from the prior
8 year of approximately $0.01 million, which is due to actual usage being higher than what
9 was projected in the Company's 2023 filing. The table below details the benefit included
10 in current rates and the proposed benefit included in this filing.
11 Change in Benefit
Proposed Present
Idaho portion of benefit amount $ (3,258,527) $ (5,118,545) $ 1,860,018
12
13 The Company is therefore proposing an overall increase of$1.9 million or 0.6%
14 for qualifying customers. The change in rate credit has no effect on Avista's net income.
15
16 IV. PROPOSED RATES TO BE EFFECTIVE OCTOBER 1, 2025
17 The Company is proposing a per kilowatt-hour Residential and Small Farm Energy
18 Rate Adjustment credit rate of 0.2330 for rate schedules 1, 12, 22, 32, and 48 to become
19 effective October 1, 2025. Attachment A to this Application provides the Residential and
20 Small Farm Energy Rate Calculation. Attached as Exhibit "A" is a copy of the proposed
21 tariff, Schedule 59,which contains the proposed Residential and Small Farm Energy rates
22 discussed earlier in this Application. Exhibit "A" also includes the proposed changes to
AVISTA'S ELECTRIC RESIDENTIAL AND SMALL FARM ANNUAL RATE
ADJUSTMENT FILING PAGE 3

I Schedule 59 in strike-out/underline format. Residential customers using an average of 939
2 kilowatt-hours per month would see their monthly bills increase from $104.30 to $105.55,
3 a increase of$1.25 per month, or 1.2%.
4
5 V. COMMUNICATIONS AND SERVICE OF APPLICATION
6 In conformance with RP 125, this Application will be brought to the attention of
7 the Company's customers. Included in this filing is the form of Press Release which will
8 be issued on July 31, 2025, as well as the form of Customer Notice which will be included
9 in customer bills beginning in early August 2025 and run for a full billing cycle.
10
11 VI. REQUEST FOR RELIEF
12 The Company requests that the Commission issue an order approving a per
13 kilowatt-hour Residential and Small Farm Energy credit rate of 0.2330 for rate schedules
14 1, 12,22, 32, and 48 to become effective October 1,2025. The Residential and Small Farm
15 Energy credit represents a $1.9 million, or 0.6%, increase to qualifying customers. The
16 Company requests that the matter be processed under the Commission's Modified
17 Procedure rules through the use of written comments.
18 Dated at Spokane, Washington this 3 1"day of July 2025.
19 AVISTA CORPORATION
20 BY /s/ David J. Meyer
21 David J. Meyer
22 Vice President and Chief Counsel for
23 Regulatory and Governmental Affairs
24 Avista Corporation
AVISTA'S ELECTRIC RESIDENTIAL AND SMALL FARM ANNUAL RATE
ADJUSTMENT FILING PAGE 4