20250219Notice_of_Application_Order_No_36470.pdf

Office of the Secretary
Service Date
February 19,2025
BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF AVISTA ) CASE NOS. AVU-E-25-01
CORPORATION'S APPLICATION FOR THE ) AVU-G-25-01
AUTHORITY TO INCREASE ITS RATES )
AND CHARGES FOR ELECTRIC AND ) NOTICE OF APPLICATION
NATURAL GAS SERVICE TO ELECTRIC )
AND NATURAL GAS CUSTOMERS IN THE ) NOTICE OF
STATE OF IDAHO ) INTERVENTION DEADLINE
ORDER NO. 36470
On January 31, 2025, Avista Corporation ("Company") filed an application
("Application") requesting authorization to increase its rates for both electric and natural gas
services in Idaho. The Company represents that its existing base rates and charges for electric and
natural gas service were approved in Commission Order No. 35909.
The Company requests a Two-Year Rate Plan with a Rate Year I electric base revenues
increase of $43.0 million and natural gas base revenues increase of $8.8 million, effective
September 1, 2025. The Company also requests a Rate Year 2 electric base revenues increase of
$17.7 million and natural gas base revenues increase of$1.0 million, effective September 1, 2026.
We now issue this Notice of Application and Notice of Intervention Deadline establishing
a deadline for interested persons to intervene.
NOTICE OF APPLICATION
YOU ARE HEREBY NOTIFIED that the Company represents that if its Application is
approved, the electric general rate request will increase annual base revenues by$43.0 million, or
14.4% on a billed basis, effective September 1, 2025; and$17.7 million, or 5.2%on a billed basis,
effective September 1,2026.Further,if approved,the natural gas general rate request will increase
annual revenues by$8.8 million,or 10.3%on a billed basis, effective September 1,2025; and$1.0
million, or 1%on a billed basis, effective September 1, 2026. The Company states that the electric
and natural gas requests are based on a proposed rate of return("ROR") of 7.68%,with a common
equity ratio ("CER") of 50%, and a 10.4%return on equity("ROE").
YOU ARE FURTHER NOTIFIED that the Company represents that, effective September
1, 2025, residential electric customers in Idaho using an average of 939 kilowatt hours ("kWh")
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NOTICE OF INTERVENTION DEADLINE
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per month could expect to see a total billed increase of 14.7%, or $15.36, for a revised monthly
bill of$119.66 from$104.30, and the proposed monthly increase includes a$5 per month increase
in the basic charge to a level of$25.00 per month. See Exhibit B attached to the Application.
Further, effective September 1, 2026, residential electric customers in Idaho using an average of
939 kWh per month could expect to see a total billed increase of 5.3%, or $6.36, for a revised
monthly bill of$126.02 from $119.66, and that the proposed monthly increase includes a $5 per
month increase in the basic charge to a level of$30.00 per month. Id.
YOU ARE FURTHER NOTIFIED that the Company represents that, effective September
1, 2025, residential natural gas customers in Idaho using an average of 66 therms per month could
expect to see a total billed increase of 10.4%, or $6.29, for a revised monthly bill of$66.92 from
$60.63. Further, effective September 1, 2026, residential natural gas customers in Idaho using an
average of 66 therms per month could expect to see a total billed increase of 1.3%, or$0.88, for a
revised monthly bill of$67.80 from $66.92.
YOU ARE FURTHER NOTIFIED that the Company asserts the primary factors behind its
proposed electric and natural gas revenue requirements in the Two-Year Rate Plan are an increase
in net plant investment. The Company asserts that electric net power supply expenses also
"contribute significantly" to the proposed incremental electric revenue requirement. Application
at 4. Last, the Company represents other factors affecting its revenue requirements are increases
in distribution, operation and maintenance, and administrative and general expenses for both
electric and natural gas operations.
YOU ARE FURTHER NOTIFIED that the Company represents that notice to the public
of the proposed rates and charges will be given to customers by distributing a customer notice, as
a bill stuffer,to each customer over a billing cycle during the months of February and March 2025.
YOU ARE FURTHER NOTIFIED that the Application and supporting documentation
have been filed with the Commission and 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, or click on the
"NATURAL GAS"icon, select"Open Cases,"and click one of the case numbers as shown on the
front of this document.
YOU ARE FURTHER NOTIFIED that the Commission has designated this case as a
general rate case. As such, the Company's intrastate revenue requirement, and every component
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ORDER NO. 36470 2

of it, both rate base and expense, are at issue. The Commission may grant, deny, or modify the
revenue requirement requested and may find a revenue requirement different from that proposed
by any party is just, fair, and reasonable. IDAPA 31.01.01.124.01.
YOU ARE FURTHER NOTIFIED that all the Company's retail rates and charges, both
recurring and non-recurring, including those of special contract customers, are at issue, and every
component of every existing and proposed rate and charge is at issue. The Commission may
approve, reject, or modify the rates and charges proposed and may find that rates and charges
different from those proposed by any party are just, fair, and reasonable. IDAPA 31.01.01.124.02.
YOU ARE FURTHER NOTIFIED that the Commission may approve, reject, or modify
existing or proposed relationships between and among rates and charges within, between, or
among customer classes or rate groupings and may approve,reject, or modify existing or proposed
relationships among and between customer classes or rate groupings.Id.
YOU ARE FURTHER NOTIFIED that the Commission may abolish,reduce,or create rate
blocks or categories of rates and charges; abolish, create, or reduce components of rates and
charges;abolish,reduce,or create customer classes or rate groupings;and abolish,reduce,or create
absolute or relative differences among and between existing classes or rate groupings of customers.
Id.
YOU ARE FURTHER NOTIFIED that the tariffs,practices,rules and regulations, service,
instrumentalities, equipment, facilities, classifications, and customer relations of the utility are at
issue, and the Commission may address any of them in its order. Id.
YOU ARE FURTHER NOTIFIED that the Commission has jurisdiction over the
Company, its filing, and the issues pertaining to this case pursuant to 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 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 71-73,IDAPA 31.01.01.072-073. 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. Persons desiring to present their views without parties' rights of
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ORDER NO. 36470 3

participation do not have to intervene and may present their comments without prior notification
to the Commission or the parties.
YOU ARE FURTHER NOTIFIED that the Commission Secretary shall issue a Notice of
Parties after the deadline for intervention has passed. The Notice of Parties shall assign exhibit
numbers to each party in this proceeding.
YOU ARE FURTHER NOTIFIED that once the Notice of Parties is issued, Commission
Staff will informally confer with the parties to discuss a schedule to process this case and other
issues as may be raised by the parties.
YOU ARE FURTHER NOTIFIED that the following persons are designated as the
Company's representatives in this matter:
David J. Meyer Patrick D. Ehrbar
Vice President and Chief Counsel for Director of Regulatory Affairs
Regulatory& Governmental Affairs Avista Utilities
Avista Corporation P.O. Box 3727
P.O. Box 3727 1411 E. Mission Ave.
1411 E. Mission Ave. Spokane, WA 99220-3727
Spokane, WA 99220-3727 pat.ehrbargavistacorp.com
david.meyergavistacorp.com avistadockets(kavistacorp.com
ORDER
IT IS HEREBY ORDERED that persons desiring to intervene in this case for the purpose
of obtaining parties' rights of participation must file a Petition to Intervene with the Commission,
under Rules 71-73, IDAPA 31.01.01.071-073, no later than 21 days after the service date of this
Order.
IT IS FURTHER ORDERED that, after the Secretary issues a Notice of Parties, Staff will
informally confer with the parties to discuss the appropriate scheduling of this case.
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.
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ORDER NO. 36470 4

DONE by Order of the Idaho Public Utilities Commission at Boise, Idaho this I9th day of
February 2025.
G
EDWARD LODGE, P ENT
HN R. HAMMOND JR., COMMISSIONER
DAYN HA' D , COMMISSIONER
ATTEST:
Of Vila 13 i S
Commission Secre c
IALega1\ELECTRIC\AV UE2501_G2501_GRC\orders\AV UEG2501_Ntc_App_Int_at.docx
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