20251009Notice_of_Filing_Order_No_36792.pdf

Office of the Secretary
Service Date
October 9,2025
BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF AVISTA ) CASE NO. AVU-E-25-13
CORPORATION'S ANNUAL )
COMPLIANCE FILING TO UPDATE THE ) NOTICE OF FILING
LOAD AND GAS FORECASTS IN THE )
INCREMENTAL COST INTEGRATED ) NOTICE OF
RESOURCE PLAN AVOIDED COST ) MODIFIED PROCEDURE
MODEL TO BE USED FOR AVOIDED )
COST CALCULATIONS ) ORDER NO. 36792
On September 15, 2025, Avista Corporation ("Company") filed a compliance filing
requesting the Idaho Public Utilities Commission ("Commission") issue an order accepting its
updated load forecast, natural gas price forecast, and contracts used as inputs to calculate its
incremental cost Integrated Resource Plan avoided cost rates, as required by Order Nos. 32697,
32802, and 35274. The Company requests its filing be processed by Modified Procedure with an
effective date of January 1, 2026.
With this Order the Commission issues notice of the Company's filing and establishes
public comment and Company reply deadlines.
NOTICE OF FILING
YOU ARE HEREBY NOTIFIED that the Company represented that its most recent energy
load forecast was developed in May 2025 and is reflected in the following Table 1:
Table 1•Enemv Load Forecast
Ycar Encrgy
(aMw)
2026 1,169
2027 1,178
2028 1,186
2029 1,202
20301 1,202
2031 1.203
2032 1,204
2033 1,214
2034 1,225
2035 1,237
2036 1.248
20371 1,266
2038 1,285
2039 1,301
2040 1,320
2041 1,345
2042 1.362
2043 1,396
2044 1,406
120451 1,424
NOTICE OF FILING
NOTICE OF MODIFIED PROCEDURE
ORDER NO. 36792 1

YOU ARE FURTHER NOTIFIED the Company stated its natural gas forecast was
developed using a combination of"the U.S. Energy Information Administration's Annual Energy
Outlook. . . and forward market prices as of June 20, 2025." Filing at 3. This forecast is reflected
in the following Table 2:
Table 2:Xalural Gu Flee F�l
I Irnry
Yew liuh Stanfield
20261 4.16 3.18
2027 3.98 3.18
2029 3.92 3.36
2029 3.91 3.51
2030 4.12 3.41
2031 4.37 3.54
2032 4.74 3.96
2033 5.05 4.29
20341 5.33 4.54
2035 5.66 4.73
2036 5.89 4.73
2037 6.09 4.98
2038 6.37 4.96
2039 6.56 5.05
2040 6.30 3.03
2041 7.05 5.18
20421 7.30 5.39
2043 7.63 3.70
2044 7.93 3.93
2045 1 8.23 6.07
YOU ARE FURTHER NOTIFIED that the Company represented that, since its 2024
annual filing,the Company has not signed any new long-term Public Utility Regulatory Policy Act
of 1978 ("PURPA") contracts or Power Purchase Agreements. The Company also indicated that
it has plans to extend two PURPA contracts that are set to expire at the end of 2025.
YOU ARE FURTHER NOTIFIED that the Filing is 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.pue.idaho.gov. Click on the "ELECTRIC" icon, select "Open
Cases,"then 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 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 MODIFIED PROCEDURE
YOU ARE FURTHER NOTIFIED that the Commission has determined that the public
interest may not require a formal hearing in this matter, and it will review the case through written
submissions under the Commission's Rules of Modified Procedure Rules 201-204 of the Idaho
NOTICE OF FILING
NOTICE OF MODIFIED PROCEDURE
ORDER NO. 36792 2

Public Utilities Commission's Rules of Procedure, IDAPA 31.01.01.201-204. The Commission
notes that Modified Procedure and written comments have proven to be an effective means for
obtaining public input and participation.
YOU ARE FURTHER NOTIFIED that persons desiring to state a position on this Filing
may file a written comment explaining why they support or oppose the Filing. Persons who would
like a hearing must specifically request a hearing in their written comments. Persons shall have
until December 2, 2025, to file written comments. Comments must be filed through the
Commission's website or by e-mail unless computer access is unavailable. To comment
electronically, please access the Commission's website at www.puc.idaho.gov. Click the "Case
Comment Form" and complete the form using the case number as it appears on the front of this
document.
To file by e-mail, persons must e-mail the comments to the Commission Secretary and all
parties at the e-mail addresses listed below. Persons submitting a comment by e-mail must provide
their name, address, and the Case Number under which they are commenting. Persons submitting
a comment by e-mail also acknowledge that submitting a comment in an open case constitutes a
public record under Idaho Code § 74-101(13), and all information provided by such person is
available for public and media inspection.
If computer access is unavailable, then comments may be mailed to the Commission and
the Parties at the addresses below.Persons submitting a comment by mail must provide their name,
address, and the Case Number under which they are commenting. Persons submitting a comment
by mail also acknowledge that submitting a comment in an open case constitutes a public record
under Idaho Code§74-101(13),and all information provided by such person is available for public
and media inspection.
(Remainder of this page intentionally left blank)
NOTICE OF FILING
NOTICE OF MODIFIED PROCEDURE
ORDER NO. 36792 3

For the Idaho PUC: For Avista Corporation:
Commission Secretary Shawn Bonfield
Idaho Public Utilities Commission David J. Meyer
P.O. Box 83720 Avista Utilities
Boise, ID 83720-0074 P.O. Box 3727
secretary�a,puc.idaho.gov 1411 E. Mission Avenue
Spokane, WA 99220
Street Address for Express Mail: Shawn.Bonfield(cavistacorp.com
David.Me ergavistacorp.com
11331 W. Chinden Blvd. Dockets(cavistacorp.com
Building 8, Suite 201-A
Boise, ID 83714
YOU ARE FURTHER NOTIFIED that the Company must file any reply comments by
December 9, 2024.
YOU ARE FURTHER NOTIFIED that if no written comments or protests are received
within the time limit set,the Commission will consider this matter on its merits and enter its order
without a formal hearing. If written comments are received within the time limit set, the
Commission will consider them and, in its discretion, may set the same for formal hearing.
ORDER
IT IS HEREBY ORDERED that the Company's Filing be processed by Modified
Procedure. Persons interested in submitting written comments must do so by December 2, 2025.
The Company must file any reply comments by December 9, 2025.
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 FILING
NOTICE OF MODIFIED PROCEDURE
ORDER NO. 36792 4

DONE by Order of the Idaho Public Utilities Commission at Boise, Idaho this 91h day of
October 2025.
"LODGE,
DWNT
OHN R. HAMMOND JR., COMMISSIONER
DAYN HARDIE, COMMISSIONER
ATTEST:
9014, A-
Laura alderon Robles
Interim-Commission Secretary
IALega1\ELECTRIC\AVU-E-25-13_IRP comp\orders\Ntc of App_Mod_at.docx
NOTICE OF FILING
NOTICE OF MODIFIED PROCEDURE
ORDER NO. 36792 5