20230901CL_Attorney Cert_Exhibits.pdf

Avista Corp.
1411 East Mission P.O. Box 3727
Spokane, Washington 99220-0500
Telephone [phone]
Toll Free 800-727-9170

September 1, 2023

Commission Secretary
State of Idaho
Idaho Public Utilities Commission
11331 W. Chinden Blvd. Building 8, Suite 201-A
Boise, Idaho 83714

Case No. AVU-G-23-06

I.P.U.C. No. 27 – Natural Gas Service

The Company has attached for electronic filing with the Commission are the following revised tariff sheets:

Thirty-Third Revision Sheet 150 canceling Thirty-Second Revision Sheet 150
Twenty-Fifth Revision Sheet 155 canceling Twenty-Fourth Revision Sheet 155

The Company requests that the proposed tariff sheets be made effective November 1, 2023. These tariff sheets
reflect the Company’s annual Purchased Gas Cost Adjustment (“PGA”). If approved, the Company’s annual
revenue will increase by approximately $5.4 million or approximately 5.0%. The proposed changes have no
effect on the Company’s earnings. Detailed information related to the Company’s request was filed electronically
along with the attached Application and supporting workpapers.

If the PGA filing is approved, residential natural gas customers in Idaho using an average of 64 therms per month
would see their monthly bills increase from $74.62 to $78.16, an increase of $3.54 per month, or approximately
4.7%. The proposed natural gas rate changes would be effective November 1, 2023.

If you have any questions regarding this filing, please contact Marcus Garbarino at [phone].

Sincerely,

/s/ Patrick D. Ehrbar

Patrick D. Ehrbar
Director of Regulatory Affairs
RECEIVED
Friday, September 1, 2023 11:21:36 AM
IDAHO PUBLIC
UTILITIES COMMISSION
DAVID J. MEYER
VICE PRESIDENT AND CHIEF COUNSEL FOR
REGULATORY & GOVERNMENTAL AFFAIRS
AVISTA CORPORATION
P.O. BOX 3727
1411 EAST MISSION AVENUE
SPOKANE, WASHINGTON 99220-3727
TELEPHONE: [phone]
FACSIMILE: [phone]
[e-mail]

BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION

IN THE MATTER OF THE APPLICATION ) CASE NO. AVU-G-23-06
OF AVISTA CORPORATION FOR AN )
ORDER APPROVING A CHANGE ) ATTORNEY’S CERTIFICATE
IN NATURAL GAS RATES AND CHARGES ) CLAIM OF
CONFIDENTIALITY
TO NATURAL GAS CUSTOMERS IN THE ) RELATING TO PORTIONS
STATE OF IDAHO ) OF AVISTA’S EXHIBIT’S
) AND WORKPAPERS
)

ATTORNEY’S CERTIFICATE - 1
FOR AVISTA CORPORATION 1
I, David J. Meyer, represent Avista Corporation. I am Vice President and Chief 2
Counsel for Regulatory and Governmental Affairs for Avista Corporation (Avista or 3
Company) and I am appearing on its behalf in this proceeding. 4
I make this certification and claim of confidentiality pursuant to IDAPA 31.01.01 5
because Avista, through its supporting workpapers, is disclosing certain information that 6
is CONFIDENTIAL and constitutes TRADE SECRETS as defined by Idaho Code 7
Section 9-340 and 48-801 and protected under IDAPA 31.01.01.067 and 31.01.01.233. 8
The electronic information Avista provides will, as required under IDAPA Rule 9
31.01.01.067, be marked as CONFIDENTIAL on all documents. 10
The confidential information that Avista is disclosing includes, but is not limited 11
to certain forward wholesale natural gas pricing which is provided by a third-party 12
vendor, who does not allow public access to their proprietary information. Avista herein 13
asserts that the aforementioned information is confidential in that making third-party 14
pricing data public will violate the terms of our agreement with the vendor. 15
I am of the opinion that this information is CONFIDENTIAL, as defined by 16
Idaho Code Sections 9-340D and 48-801, should therefore be protected from public 17
inspection, examination and copying, and should be utilized only in accordance with the 18
terms of the protective agreement between Avista Corporation and Parties who have 19
requested such an agreement. 20
RESPECTFULLY SUBMITTED this 1st day of September 2023 21
22
/s/ David J. Meyer 23
ATTORNEY’S CERTIFICATE - 2
David J. Meyer 1
Vice President and Chief Counsel for 2
Regulatory & Governmental Affairs 3
Avista Corporation 4

AVISTA UTILITIES

Case No. AVU-G-23-06

EXHIBIT “A”

Proposed Tariff Sheets

Thirty-Third Revision Sheet 150
Replacing
I.P.U.C. No.27 Thirty-Second Revision Sheet 150

150
AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 1, 2023 Effective November 1, 2023
Issued by Avista Utilities
By Patrick Ehrbar – Director of Regulatory Affairs

SCHEDULE 150
PURCHASE GAS COST ADJUSTMENT - IDAHO

APPLICABLE:
To Customers in the State of Idaho where Company has natural gas service
available.

PURPOSE:
To pass through changes in costs resulting from purchasing and transporting
natural gas, to become effective as noted below.

RATE:
(a) The retail rates of firm gas Schedules 101, 111 and 112 are to be increased
by 37.718¢ per therm in all blocks of these rate schedules.

(b) The rates of interruptible Schedules 131 and 132 are to be increased by
28.834¢ per therm.

(c) The rate for transportation under Schedule 146 is to be decreased by
0.000¢ per therm.

WEIGHTED AVERAGE GAS COST:
The above rate changes are based on the following weighted average cost of gas
per therm as of the effective date shown below:
Demand Commodity Total
Schedules 101 8.884¢ 28.834¢ 37.718¢
Schedules 111 and 112 8.884¢ 28.834¢ 37.718¢
Schedules 131 and 132 0.000¢ 28.834¢ 28.834¢
The above amounts include a gross revenue factor.

Demand Commodity Total
Schedules 101 8.850¢ 28.725¢ 37.575¢
Schedules 111 and 112 8.850¢ 28.725¢ 37.575¢
Schedules 131 and 132 0.000¢ 28.725¢ 28.725¢
The above amounts do not include a gross revenue factor.

BALANCING ACCOUNT:
The Company will maintain a Purchase Gas Adjustment (PGA) Balancing Account
whereby monthly entries into this Balancing Account will be made to reflect differences
between the actual purchased gas costs collected from customers and the actual
purchased gas costs incurred by the Company. Those differences are then collected from
or refunded to customers under Schedule 155 – Gas Rate Adjustment.

Thirty-Second Revision Sheet 150
Replacing
I.P.U.C. No.27 Thirty-First Revision Sheet 150

150
AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 2, 2022 Effective November 1, 2022
Issued by Avista Utilities
By Patrick Ehrbar – Director of Regulatory Affairs

SCHEDULE 150
PURCHASE GAS COST ADJUSTMENT - IDAHO

APPLICABLE:
To Customers in the State of Idaho where Company has natural gas service
available.

PURPOSE:
To pass through changes in costs resulting from purchasing and transporting
natural gas, to become effective as noted below.

RATE:
(a) The retail rates of firm gas Schedules 101, 111 and 112 are to be increased
by 44.308¢ per therm in all blocks of these rate schedules.

(b) The rates of interruptible Schedules 131 and 132 are to be increased by
35.070¢ per therm.

(c) The rate for transportation under Schedule 146 is to be decreased by
0.000¢ per therm.

WEIGHTED AVERAGE GAS COST:
The above rate changes are based on the following weighted average cost of gas
per therm as of the effective date shown below:
Demand Commodity Total
Schedules 101 9.238¢ 35.070¢ 44.308¢
Schedules 111 and 112 9.238¢ 35.070¢ 44.308¢
Schedules 131 and 132 0.000¢ 35.070¢ 35.070¢
The above amounts include a gross revenue factor.

Demand Commodity Total
Schedules 101 9.198¢ 34.917¢ 44.115¢
Schedules 111 and 112 9.198¢ 34.917¢ 44.115¢
Schedules 131 and 132 0.000¢ 34.917¢ 34.917¢
The above amounts do not include a gross revenue factor.

BALANCING ACCOUNT:
The Company will maintain a Purchase Gas Adjustment (PGA) Balancing Account
whereby monthly entries into this Balancing Account will be made to reflect differences
between the actual purchased gas costs collected from customers and the actual
purchased gas costs incurred by the Company. Those differences are then collected from
or refunded to customers under Schedule 155 – Gas Rate Adjustment.

Thirty-Third Revision Sheet 150
Replacing
I.P.U.C. No.27 Thirty-Second Revision Sheet 150

150
AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 1, 2023 Effective November 1, 2023
Issued by Avista Utilities
By Patrick Ehrbar – Director of Regulatory Affairs

SCHEDULE 150
PURCHASE GAS COST ADJUSTMENT - IDAHO

APPLICABLE:
To Customers in the State of Idaho where Company has natural gas service
available.

PURPOSE:
To pass through changes in costs resulting from purchasing and transporting
natural gas, to become effective as noted below.

RATE:
(a) The retail rates of firm gas Schedules 101, 111 and 112 are to be increased
by 37.718¢ per therm in all blocks of these rate schedules.

(b) The rates of interruptible Schedules 131 and 132 are to be increased by
28.834¢ per therm.

(c) The rate for transportation under Schedule 146 is to be decreased by
0.000¢ per therm.

WEIGHTED AVERAGE GAS COST:
The above rate changes are based on the following weighted average cost of gas
per therm as of the effective date shown below:
Demand Commodity Total
Schedules 101 8.884¢ 28.834¢ 37.718¢
Schedules 111 and 112 8.884¢ 28.834¢ 37.718¢
Schedules 131 and 132 0.000¢ 28.834¢ 28.834¢
The above amounts include a gross revenue factor.

Demand Commodity Total
Schedules 101 8.850¢ 28.725¢ 37.575¢
Schedules 111 and 112 8.850¢ 28.725¢ 37.575¢
Schedules 131 and 132 0.000¢ 28.725¢ 28.725¢
The above amounts do not include a gross revenue factor.

BALANCING ACCOUNT:
The Company will maintain a Purchase Gas Adjustment (PGA) Balancing Account
whereby monthly entries into this Balancing Account will be made to reflect differences
between the actual purchased gas costs collected from customers and the actual
purchased gas costs incurred by the Company. Those differences are then collected from
or refunded to customers under Schedule 155 – Gas Rate Adjustment.

Twenty-Fifth Revision Sheet 155
Canceling
I.P.U.C. No.27 Twenty-Fourth Revision Sheet 155

155
AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 1, 2023 Effective November 1, 2023

Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

SCHEDULE 155
GAS RATE ADJUSTMENT - IDAHO

AVAILABLE:
To Customers in the State of Idaho where Company has natural gas service
available.

PURPOSE:
To adjust gas rates for amounts generated by the sources listed below.

MONTHLY RATE:
(a) The rates of firm gas Schedules 101 and 111 are to be
increased by 25.281¢ per therm in all blocks of these rate schedules.
(b) The rate of interruptible gas Schedule 131 is to be decreased by
0.000¢ per therm.
(c) The rate of transportation gas Schedule 146 is to be decreased by 0.000¢
per therm.

SOURCES OF MONTHLY RATE:
Changes in the monthly rates above result from amounts which have been
accumulated in the Purchase Gas Adjustment (PGA) Balancing Account as
described in Schedule 150 – Purchase Gas Cost Adjustment.

SPECIAL TERMS AND CONDITIONS:
The above Monthly Rate is subject to the provisions of Tax Adjustment Schedule
158.

Twenty-Fourth Revision Sheet 155
Canceling
I.P.U.C. No.27 Twenty-Third Revision Sheet 155

155
AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 2, 2022 Effective November 1, 2022

Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

SCHEDULE 155
GAS RATE ADJUSTMENT - IDAHO

AVAILABLE:
To Customers in the State of Idaho where Company has natural gas service
available.

PURPOSE:
To adjust gas rates for amounts generated by the sources listed below.

MONTHLY RATE:
(a) The rates of firm gas Schedules 101 and 111 are to be
increased by 13.163¢ per therm in all blocks of these rate schedules.
(b) The rate of interruptible gas Schedule 131 is to be decreased by
0.000¢ per therm.
(c) The rate of transportation gas Schedule 146 is to be decreased by 0.000¢
per therm.

SOURCES OF MONTHLY RATE:
Changes in the monthly rates above result from amounts which have been
accumulated in the Purchase Gas Adjustment (PGA) Balancing Account as
described in Schedule 150 – Purchase Gas Cost Adjustment.

SPECIAL TERMS AND CONDITIONS:
The above Monthly Rate is subject to the provisions of Tax Adjustment Schedule
158.

Twenty-Fifth Revision Sheet 155
Canceling
I.P.U.C. No.27 Twenty-Fourth Revision Sheet 155

155
AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 1, 2023 Effective November 1, 2023

Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

SCHEDULE 155
GAS RATE ADJUSTMENT - IDAHO

AVAILABLE:
To Customers in the State of Idaho where Company has natural gas service
available.

PURPOSE:
To adjust gas rates for amounts generated by the sources listed below.

MONTHLY RATE:
(a) The rates of firm gas Schedules 101 and 111 are to be
increased by 25.281¢ per therm in all blocks of these rate schedules.
(b) The rate of interruptible gas Schedule 131 is to be decreased by
0.000¢ per therm.
(c) The rate of transportation gas Schedule 146 is to be decreased by 0.000¢
per therm.

SOURCES OF MONTHLY RATE:
Changes in the monthly rates above result from amounts which have been
accumulated in the Purchase Gas Adjustment (PGA) Balancing Account as
described in Schedule 150 – Purchase Gas Cost Adjustment.

SPECIAL TERMS AND CONDITIONS:
The above Monthly Rate is subject to the provisions of Tax Adjustment Schedule
158.

AVISTA UTILITIES

Case No. AVU-G-23-06

EXHIBIT “B”

Notice of Public Applicant’s Proposed Tariffs

Important Notice for Idaho Customers (September 2023)
Avista has filed a rate adjustment request with the Idaho Public Utilities Commission (Commission) that, if approved, is designed to increase overall natural gas revenue by approximately $5.4 million or 5.0% effective Nov. 1, 2023. This filing has no impact on Avista’s earnings.
This adjustment is related to the annual Purchased Gas Cost Adjustment (PGA) filing. The PGA is filed each year to balance the actual cost of wholesale natural gas purchased by Avista to serve customers with the amount included in rates. This includes the natural gas commodity cost as well as the cost to transport natural gas on interstate pipelines to Avista’s local distribution system. The increase is primarily driven by the increase in wholesale natural gas costs that were higher than the level included in rates during the past year. If approved, Avista’s request is designed to increase annual natural gas revenues by approximately
$5.4 million or 5.0%.
Customer Bills
Natural Gas If the natural gas PGA (AVU-G-06) filing is approved, residential natural gas customers in Idaho using an average of 64 therms per month would see their monthly bills increase from $74.62 to $78.16, an increase
of $3.54 per month, or approximately 4.7%. The proposed natural gas rate changes would be effective Nov. 1, 2023.
The net effect, on an annual revenue basis, for the requested natural gas rate changes by rate schedule are:
Rate Application Procedure
The Company’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 the Company’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 our website, 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 puc.idaho.gov/Form/CaseComment or mailing comments to:
Idaho Public Utilities Commission P.O. Box 83720 Boise, ID 83720-0074
When filing comments reference the appropriate Case Number.
Avista offers a number of programs and services to help customers manage their energy use and costs. Visit
www.myavista.com for information on these programs which include Comfort Level Billing, bill payment options, automated payment service, assistance programs, conservation tips, and energy efficiency rebates.
AVAxxxi

AVISTA UTILITIES

Case No. AVU-G-23-06

EXHIBIT “C”

Copy of Press Release and Customer Notice

Contact:
Media: Lena Funston [phone] [e-mail]
Investors: Stacey Wenz [phone], [e-mail]
Avista 24/7 Media Access [phone]
Avista Makes Annual Price Adjustment Requests in Washington and
Idaho
Overall changes in electric and natural gas prices would be effective November 1, 2023

SPOKANE, Wash. September 1, 2023, 4:05 p.m. PST: Avista (NYSE: AVA) has made annual
rate adjustment filings with the utility commissions in Washington and Idaho that, if approved, will
result in an increase in electric rates and decrease in natural gas rates in Washington, and
increase natural gas rates in Idaho, effective November 1, 2023.

Washington Electric Adjustment Filings
Four electric adjustments were filed, that if approved, are designed to change overall electric
revenues as follows:
1. Wildfire Expense Balancing: increase of $3.3 million or 0.6%
2. Residential Exchange Program: increase of $1.1 million or 0.2%
3. Insurance Expense Balancing: increase of $0.1 million or 0.0%
4. Low Income Rate Assistance Program: increase of $7.6 million or 1.3%

Washington Natural Gas Adjustment Filings
Two electric adjustments were filed, that if approved, are designed to change overall natural gas
revenues as follows:
1. Purchased Gas Cost Adjustment: decrease of $8.1 million or 3.0%
2. Low Income Rate Assistance Program: increase of $4.6 million or 1.7%
3. Insurance Expense Balancing: increase of $10 thousand or 0.0%

Idaho Natural Gas Adjustment Filing
One natural gas adjustment was filed that, if approved, is designed to change overall natural gas
revenues as follows:
1. Purchased Gas Cost Adjustment: increase of $5.4 million or 5.0%

Purchased Gas Cost Adjustment (PGA) – Applicable to Washington and Idaho Natural Gas
PGA requests are typically filed annually to balance the actual cost of wholesale natural gas
purchased by Avista to serve customers with the amount presently included in customer’s rates.
Avista does not make a profit on, or markup, the wholesale cost of natural gas. PGAs ensure
customers pay what Avista pays, dollar for dollar, only at a more predictable and stable rate
throughout the year. About 55% of an Avista natural gas customer's bill is the combined cost of
purchasing natural gas on the wholesale market and transporting it to Avista's system.

These rate adjustments are driven primarily by higher wholesale natural gas prices observed
during this past winter, which were well above the amounts included in rates. That was partially
offset by lower forward wholesale natural gas prices for the upcoming PGA year. For Washington,

the reduction is further is largely driven due to a reduction in the current seasonal surcharge
amortization rate in effect for residential customers, as approved by the Washington Utilities and
Transportation Commission last Fall.

Wildfire Balancing – Applicable to Washington Electric
The Wildfire Expense Balancing account tracks the difference in wildfire expenses incurred by
Avista to address the growing frequency of extreme and dangerous wildfires in Avista’s service
territory to the base level of expense approved by the Commission. The difference is rebated to
or collected from customers annually. The rate increase proposed today reflects the higher level
of expense incurred above the amount presently included in customer’s rates.

Residential Exchange Program – Applicable to Washington Electric
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 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.
Low Income Rate Assistance Program – Applicable to Washington Electric and Natural
Gas
The Low Income Rate Assistance Program, or LIRAP, provides bill assistance to income eligible
customers with a household income less than or equal to 200% Federal Poverty Level (FPL) or
80% Area Median Income (AMI), whichever is greater. While this program has historically
provided lump-sum grants to customers, LIRAP will transition to an income-based bill discount –
in addition to offerings to help customers manage their past due balances, or arrearages – on
October 1, 2023. This new bill assistance model will expand LIRAP to serve more customer than
ever before, therefore requiring increased funding to do so. The rate increase proposed reflects
this higher level of funding needed.

Insurance Balancing – Applicable to Washington Electric and Natural Gas
The Insurance Expense Balancing account tracks the difference in insurance expense incurred
by Avista to the base level of expense approved by the Commission. The difference is rebated to
or collected from customers annually. The rate changes proposed reflect the higher level of
expense incurred for electric customers and lower expense incurred for natural gas customers,
compared to the amount presently included in customer’s rates.

Electric Customer Bills
Washington: If approved, residential electric customers in Washington using an average of 932
kilowatt hours per month would see their monthly bills change from $87.53 to $89.88, an increase
of $2.35 per month, or approximately 2.7%.

The percentage change varies by rate schedule and is dependent upon how much energy
customers on the respective rate schedules use. If approved, residential electric customers would
see the following rate adjustments:

Residential Service - Schedule 1 & 2 2.6%
General Service - Schedules 11 & 12 1.6%

Large General Service - Schedules 21 & 22 1.8%
Extra Large General Service - Schedule 25 & 25I 1.3%
Pumping Service - Schedules 31 & 32 2.7%
Street & Area Lights - Schedules 41-48 2.4%
Overall 2.1%

Natural Gas Customer Bills
Washington: If approved, residential natural gas customers using an average of 67 therms per
month would see their monthly bills change from $96.78 to $92.13, a decrease of $4.65 per month,
or approximately 4.8%.

The percentage change varies by rate schedule and is dependent upon how much energy
customers on the respective rate schedules use. If approved, natural gas customers would see
the following rate adjustments:
General Service - Schedule 1 01 & 102 (4.5)%
Large General Service - Schedule 111 & 112 10.2%
Interruptible Sales Service - Schedule 131 & 132 (18.9)%
Transportation Service - Schedule 146 (0.1)%
Overall (1.3)%

Idaho: If approved, residential natural gas customers using an average of 64 therms per month
would see their monthly bills change from $74.62 to $78.16, an increase of $3.54 per month, or
approximately 4.7%.

The percentage change varies by rate schedule and is dependent upon how much energy
customers on the respective rate schedules use. If approved, natural gas customers would see
the following rate adjustments:
General Service - Schedule 1 01 4.7%
Large General Service - Schedule 111 & 112 6.3%
Interruptible Sales Service - Schedule 131 & 132 0.0%
Transportation Service - Schedule 146 0.0%
Overall 5.0%

To help customers proactively manage their energy use, Avista offers services to those who may
need and qualifies for assistance in managing their energy bills such as comfort level billing,
payment arrangements and special circumstantial referrals to area agencies and churches for
help with housing, utilities, medical assistance and other needs. Avista also provides funding for
energy assistance programs which are administered through community action agencies.
Energy efficiency and outreach programs are also offered which include rebates and incentives
as well as tips and resources to help customers manage their energy use and energy bills.
Customers can learn more at www.myavista.com.

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 408,000 customers and natural gas to 375,000 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 June 30, 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

-2226-

To unsubscribe from Avista’s news release distribution, send a reply message to
[e-mail]
Important Notice for Idaho Customers (September 2023)
Avista has filed a rate adjustment request with the Idaho Public Utilities Commission (Commission) that, if approved, is designed to increase overall natural gas revenue by approximately $5.4 million or 5.0% effective Nov. 1, 2023. This filing has no impact on Avista’s earnings.
This adjustment is related to the annual Purchased Gas Cost Adjustment (PGA) filing. The PGA is filed each year to balance the actual cost of wholesale natural gas purchased by Avista to serve customers with the amount included in rates. This includes the natural gas commodity cost as well as the cost to transport natural gas on interstate pipelines to Avista’s local distribution system. The increase is primarily driven by the increase in wholesale natural gas costs that were higher than the level included in rates during the past year. If approved, Avista’s request is designed to increase annual natural gas revenues by approximately
$5.4 million or 5.0%.
Customer Bills
Natural Gas If the natural gas PGA (AVU-G-06) filing is approved, residential natural gas customers in Idaho using an average of 64 therms per month would see their monthly bills increase from $74.62 to $78.16, an increase
of $3.54 per month, or approximately 4.7%. The proposed natural gas rate changes would be effective Nov. 1, 2023.
The net effect, on an annual revenue basis, for the requested natural gas rate changes by rate schedule are:
Rate Application Procedure
The Company’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 the Company’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 our website, 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 puc.idaho.gov/Form/CaseComment or mailing comments to:
Idaho Public Utilities Commission P.O. Box 83720 Boise, ID 83720-0074
When filing comments reference the appropriate Case Number.
Avista offers a number of programs and services to help customers manage their energy use and costs. Visit
www.myavista.com for information on these programs which include Comfort Level Billing, bill payment options, automated payment service, assistance programs, conservation tips, and energy efficiency rebates.
AVAxxxi