20230731Media Notice.pdf

Contact: DRAFT
Media: Lena Funston [phone] [e-mail]
Investors: Stacey Wenz [phone] [e-mail]
Avista 24/7 Media Access [phone]

Avista Makes Annual Price Adjustment Filings in Idaho
Requests would result in higher electric prices effective Oct. 1, 2023 and lower natural gas
prices Nov. 1, 2023.

SPOKANE, Wash. – July 31, 2023, 4:05 p.m. PDT: Avista (NYSE: AVA) has made annual rate
adjustment filings with the Idaho Public Utilities Commission (IPUC or Commission) that, if approved, are
designed to increase overall electric revenues by approximately $6.1 million or 2.4% effective Oct. 1, 2023
and decrease overall natural gas revenue by approximately $0.4 million or 0.4% effective Nov. 1, 2023.
These annual filings have no impact on Avista’s earnings.
Electric Adjustment Filings
Four annual electric adjustments were filed, that if approved, are designed to change overall electric
revenues effective Oct. 1, 2023 as follows:

1. Power Cost Adjustment (PCA): an increase of approximately $10.9 million or 4.3%
2. Fixed Cost Adjustment (FCA): a decrease of approximately $1.9 million or 0.7%
3. Electric Energy Efficiency: a decrease of approximately $3.1 million or 1.2%
4. Bonneville Power Administration Residential Exchange (ResEx) Program: an increase of
approximately $0.2 million or 0.1%

Natural Gas Adjustment Filing
The natural gas adjustment request is the annual natural gas FCA. If approved, Avista’s request is designed
to decrease overall natural gas revenues by approximately $0.4 million or 0.4% effective Nov. 1, 2023.

Customer Bills Resulting from these Filings
If the electric PCA, FCA, Energy Efficiency and ResEx filings are approved, residential electric customers
in Idaho using an average of 927 kilowatt hours per month would see their monthly bills increase from
$85.40 to $86.54, an increase of $1.14 per month, or approximately 1.3%. The proposed electric rate
change would be effective Oct. 1, 2023.

The net effect, on an annual revenue basis, for the requested electric rate changes by rate schedule are as
follows:

Residential Service - Schedule 1 1.4%
General Service - Schedules 11 & 12 2.9%
Large General Service - Schedules 21 & 22 2.2%
Extra Large General Service - Schedule 25 5.2%
Extra Large General Service - Schedule 25P 5.6%
Pumping Service - Schedules 31 & 32 2.4%
Street & Area Lights - Schedules 41-49 -0.4%
Overall 2.4%

If the natural gas FCA filing is approved, residential natural gas customers in Idaho using an average of 64
therms per month would see their monthly bills decrease from $73.42 to $73.29, a decrease of $0.13 per
month, or approximately 0.2%. The proposed natural gas rate change would be effective Nov. 1, 2023.

The net effect, on a revenue basis, for the requested natural gas rate change by rate schedule are as
follows:

General Service - Schedule 101 -0.2%
Large General Service - Schedules 111 & 112 -1.2%
Interruptible Service - Schedules 131 & 132 0.0%
Transportation Service - Schedule 146 0.0%
Overall -0.4%

Power Cost Adjustment (PCA)
The PCA is an annual rate adjustment made to reflect the difference between the actual cost of generating
and purchasing electric power to serve customers and the cost currently included in customer rates. Over
the last year, power supply costs were higher than those included in retail rates due to higher wholesale
electric and natural gas prices.

Fixed Cost Adjustment (FCA)
The electric and natural gas FCA is a mechanism designed to break the link between a utility’s revenues
and customers’ energy usage. Avista’s actual revenue, based on kilowatt hour or therm sales, will vary, up
or down, from the level included in a general rate case and approved by the Commission. This could be
caused by changes in weather, energy conservation or other factors. Under the FCA, Avista’s revenues
are adjusted each month based on the number of customers. The annual difference between revenues
based on sales and the number of customers is surcharged or rebated to customers beginning in the
following year.

The proposed FCA rate adjustments are primarily driven by variations in 2022 customer usage related to
weather and savings from participating in efficiency programs. The FCA mechanisms do not apply to
Avista’s Electric Extra Large General and Street Lighting Service Schedules, nor to its Natural Gas
Interruptible and Transportation Service Schedules.

Energy Efficiency Adjustment
The Energy Efficiency Adjustment is related to the funding of Avista’s electric energy efficiency programs.
This adjustment aligns the amount that is collected in customer rates with the actual costs to run and deliver
the programs. Avista’s energy efficiency programs are designed to provide a financial incentive or rebate
for cost-effective energy efficiency measures. The Commission approves the amount of funding for these
important programs through a portion of energy rates. The rate reduction proposed reflects the lower level
of funding needed to operate the programs in the coming year.

Residential Exchange Adjustment
The Residential Exchange Program provides a share of the benefits of the federal Columbia River power
system to the residential and small farm customers of the investor-owned utilities in the Pacific Northwest,
including Avista. Avista applies the benefits it receives, which typically fluctuate from year to year, to
customers as a credit in their monthly electric rates. Due to fluctuations in usage, Avista rebated to
customers a level of benefits that was slightly higher than the level of benefits received from BPA. Through
this filing Avista is seeking to slightly decrease the level of benefits provided to qualifying customers in order
to return the over-rebated balance.

Rate Application Procedure
Avista’s applications are proposals, subject to public review and a Commission decision. Copies of the
applications are available for public review at the offices of both the Commission and Avista, and on the
Commission’s website (www.puc.idaho.gov). Customers may file with the Commission written comments
related to Avista’s filings. Customers may also subscribe to the Commission’s RSS feed
(http://www.puc.idaho.gov/rssfeeds/rss.htm) to receive periodic updates via e-mail about the case. Copies
of rate filings are also available on Avista’s website at www.myavista.com/rates.

If you would like to submit comments on the proposed rate change, you can do so by going to the
Commission website or mailing comments to:

Idaho Public Utilities Commission
P.O. Box 83720
Boise, ID 83720-0074

About Avista Corp.
Avista Corp. is an energy company involved in the production, transmission and distribution of energy as
well as other energy-related businesses. Avista Utilities is our operating division that provides electric
service to 411,000 customers and natural gas to 377,000 customers. Our service territory covers 30,000
square miles in eastern Washington, northern Idaho and parts of southern and eastern Oregon, with a
population of 1.7 million. AERC is an Avista subsidiary that, through its subsidiary AEL&P, provides retail
electric service to 17,000 customers in the city and borough of Juneau, Alaska. Our stock is traded under
the ticker symbol “AVA”. For more information about Avista, please visit www.avistacorp.com.

This news release contains forward-looking statements regarding the company’s current expectations.
Forward-looking statements are all statements other than historical facts. Such statements speak only as
of the date of the news release and are subject to a variety of risks and uncertainties, many of which are
beyond the company’s control, which could cause actual results to differ materially from the expectations.
These risks and uncertainties include, in addition to those discussed herein, all of the factors discussed in
the company’s and the Quarterly Report on Form 10-Q for the quarter ended Mar. 31, 2023, and its Annual
Report on Form 10-K for the year ended Dec. 31, 2022.

Avista Corp. and the Avista Corp. logo are trademarks of Avista Corporation.

SOURCE: Avista Corporation
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