20250829Compliance Filing.pdf

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Avista Corp. August 29, 2025
1411 East Mission P.O. Box 3727 IDAHO PUBLIC
Spokane. Washington 99220-0500 UTILITIES COMMISSION
Telephone [phone]
Toll Free 800-727-9170
Via Electronic Mail
August 29, 2025
Commission Secretary
State of Idaho
Idaho Public Utilities Commission
11331 W. Chinden Blvd. Building 8, Suite 201-A
Boise, Idaho 83702-5983
RE: Tariff I.P.U.C. No. 28 (Electric) and Tariff LP.U.C.No. 27 (Natural Gas)
Case Nos. AVU-E-25-01 and AVU-G-25-01
Compliance Tariff Filing
Commission Order No. 36741 - Case Nos. AVU-E-25-01 and AVU-G-25-01
Enclosed for electronic filing with the Commission are the compliance tariffs per the
Commission's Order No. 36741 in Case Nos. AVU-E-25-01 and AVU-G-25-01.
Electric
Nineteenth Revision Sheet 001 canceling Eighteenth Revision Sheet 001
Nineteenth Revision Sheet 011 canceling Eighteenth Revision Sheet 011
Nineteenth Revision Sheet 021 canceling Eighteenth Revision Sheet 021
First Revision Sheet 023 canceling Original Sheet 23
Nineteenth Revision Sheet 025 canceling Eighteenth Revision Sheet 025
Twentieth Revision Sheet 025P canceling Nineteenth Revision Sheet 025P
Nineteenth Revision Sheet 031 canceling Eighteenth Revision Sheet 031
Eighteenth Revision Sheet 042 canceling Seventeenth Revision Sheet 042
Fifteenth Revision Sheet 042A canceling Fourteenth Revision Sheet 042A
Eighteenth Revision Sheet 044 canceling Seventeenth Revision Sheet 044
Eighteenth Revision Sheet 045 canceling Seventeenth Revision Sheet 045
Eighteenth Revision Sheet 046 canceling Seventeenth Revision Sheet 046
Seventh Revision Sheet 046A canceling Sixth Revision Sheet 046A
Eighteenth Revision Sheet 047 canceling Seventeenth Revision Sheet 047
Seventeenth Revision Sheet 049 canceling Sixteenth Revision Sheet 049
Twelfth Revision Sheet 049A canceling Eleventh Revision Sheet 049A
Cancelled
Seventeenth Revision Sheet 41

Eighth Revision Sheet 41 A
Natural Gas
Eighteenth Revision Sheet 101 canceling Seventeenth Revision Sheet 101
Nineteenth Revision Sheet 111 canceling Eighteenth Revision Sheet 111
Twentieth Revision Sheet 112 canceling Nineteenth Revision Sheet 112
Sixteenth Revision Sheet 146 canceling Fifteenth Revision Sheet 146
These tariff sheets have an effective date of September 1, 2025, in compliance with the Order.
The compliance tariffs for Year 2 of the rate plan that will go into effect on September 1, 2026
will be filed prior to July 15, 2026.
Also enclosed is a copy of the workpapers supporting the rate changes within the tariffs. If you
have any questions regarding this filing,please call Joe Miller at [phone].
Sincerely,
Is/Patrick Ehrbar
Patrick Ehrbar
Director of Rates
Enclosures

CERTIFICATE OF SERVICE
I HEREBY CERTIFY that I have this 29th day of August, 2025, served the Compliance Filing
of Avista Corporation in Case Nos. AVU-E-25-01 and AVU-G-25-01, upon the following
parties by electronically providing a copy thereof, to:
Commission Staff: Clearwater Paper:
Adam Triplett Peter J. Richardson
Deputy Attorneys General Richardson Adams
Idaho Public Utilities Commission 515 N. 271h Street
11331 W. Chinden Blvd PO Box 7218
Building 8, Suite 201-A Boise, ID 83702
Boise, ID 83714 petergrichardsonadams.com
adam.triplett(i�puc.Idaho.gov
Dr. Don Reading
Monica Barrios-Sanchez 280 S. Silverwood Way
Idaho Public Utilities Commission Eagle, ID 83616
11331 W. Chinden Blvd dreadingkmindspring com
Building 8, Suite 201-A
Boise, ID 83714 carol.haugenkclearwaterpaper.com
secretgUkpuc.idaho.gov jamie.mcdonald(kclearwaterpaper.com
Idaho Forest Group: Walmart:
Andrew P. Moratzka Norman M. Semanko
Eden A. Faure Parsons Behle & Latimer
Stoel Rives LLP 800 W. Main St., Suite 1300
33 South Sixth Street, Suite 4200 Boise, ID 83702
Minneapolis, MN 55405 nsemankokparsonsbehle.com
andrew.moratzka(k stoel.com
eden.faure(kstoel.com Justina A. Caviglia
Parsons Behle & Latimer
Jennifer S. Palmer 50 West Liberty Street, Suite 750
Stoel Rives LLP Reno,NV 89502
101 S. Capitol Blvd., Suite 1900 jcaviglia(a parsonsbehle.com
Boise, ID 83702 rshafferkparsonsbehle.com
j enny_.palmer(k sto el.com
Dr. Jaime McGovern
Senior Manager,
Utility Partnerships
Walmart Inc.
2608 Southeast " J" Street
Bentonville, AR 72716
Jaime.mc og vemkwalmart.com
Patrick Ngalamulume
Parsons Behle & Latimer 800 West
Main Street, Ste 1300
Boise, Idaho 83702
pngalamulume(kparsonsbehle.com
/s/Athena Allen
Athena Allen
Regulatory Affairs Analyst

Nineteenth Revision Sheet 1
Canceling
I.P.U.C. No.28 Eighteenth Revision Sheet 1
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE1
RESIDENTIAL SERVICE - IDAHO
(Single phase & available voltage)
AVAILABLE:
To Customers in the State of Idaho where Company has electric service available.
APPLICABLE:
To service for domestic purposes in each individual residence, apartment, mobile
home, or other living unit when all such service used on the premises is supplied through
a single meter.
Where a portion of a dwelling is used regularly for the conduct of business or
where a portion of the electricity supplied is used for other than domestic purposes, the
appropriate general service schedule is applicable. However, if the service for all
domestic purposes is metered separately, this schedule will be applied to such service.
When two or more living units are served through a single meter, the appropriate general
service schedule is applicable.
MONTHLY RATE:
$20.00 Basic Charge, plus
First 600 kWh 9.8590 per kWh
All over 600 kWh 11.0810 per kWh
Monthly Minimum Charge: $20.00
OPTIONAL SEASONAL MONTHLY CHARGE:
A$20.00 monthly charge shall apply to Customers who close their account on a
seasonal or intermittent basis, provided no energy usage occurs during an entire monthly
billing cycle while the account is closed. Customers choosing this option are required to
notify the Company in writing or by phone in advance and the account will be closed at
the start of the next billing cycle following notification. If energy is used during a monthly
billing cycle, the above listed energy charges and basic charge of$20.00 shall apply.
SPECIAL TERMS AND CONDITIONS:
Service under this schedule is subject to the Rules and Regulations contained in
this tariff.
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 58, Residential and Farm Energy Rate Adjustment Schedule 59,
Temporary Power Cost Adjustment Schedule 66, Fixed Cost Adjustment Mechanism
Schedule 75, Tax Customer Credit Schedule 76 and Energy Efficiency Rider Adjustment
Schedule 91.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs
��C'

Nineteenth Revision Sheet 11
Canceling
I.P.U.C. No.28 Eighteenth Revision Sheet 11
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 11
GENERAL SERVICE - IDAHO
(Available phase and voltage)
AVAILABLE:
To Customers in the State of Idaho where Company has electric service
available.
APPLICABLE:
To general service supplied for all power requirements when all such service
taken on the premises is supplied through one meter installation.
MONTHLY RATE:
The sum of the following charges:
$20.00 Basic Charge, plus
Energy Charge:
First 3650 kWh 9.2110 per kWh
All Over 3650 kWh 7.7140 per kWh
Demand Charge:
No charge for the first 20 kW of demand.
$8.00 per kW for each additional kW of demand.
Minimum:
$20.00 for single phase service and $27.10 for three phase service;
unless a higher minimum is required under contract to cover special
conditions.
DEMAND:
The average kW supplied during the 15-minute period of maximum use
during the month as determined by a demand meter.
SPECIAL TERMS AND CONDITIONS:
Service under this schedule is subject to the Rules and Regulations
contained in this tariff.
The above Monthly Rates are subject to increases or decreases as set forth
in Tax Adjustment Schedule 58, Temporary Power Cost Adjustment Schedule 66,
Fixed Cost Adjustment Mechanism Schedule 75, Tax Customer Credit Schedule 76
and Energy Efficiency Rider Adjustment Schedule 91.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Nineteenth Revision Sheet 21
Canceling
I.P.U.C. No.28 Eighteenth Revision Sheet 21
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 21
LARGE GENERAL SERVICE - IDAHO
(Available phase and voltage)
AVAILABLE:
To Customers in the State of Idaho where Company has electric service available.
APPLICABLE:
To general service supplied for all power requirements when all such service taken
on the premises is supplied through one meter installation. Customer shall provide and
maintain all transformers and other necessary equipment on his side of the point of
delivery and may be required to enter into a written contract for five (5) years or longer.
MONTHLY RATE:
The sum of the following demand and energy charges:
Energy Charge:
First 250,000 kWh 7.5800 per kWh
All Over 250,000 kWh 6.3870 per kWh
Demand Charge:
$625.00 for the first 50 kW of demand or less.
$8.00 per kW for each additional kW of demand.
Primary Voltage Discount:
If Customer takes service at 11 kv (wye grounded) or higher, he will be
allowed a primary voltage discount of 400 per kW of demand per month.
Power Factor Adjustment Charge:
If Customer has a reactive kilovolt-ampere (kVAr) meter, he will be subject to
a Power Factor Adjustment charge, as set forth in the Rules & Regulations.
Minimum:
$625.00, unless a higher minimum is required under contract to cover special
conditions.
ANNUAL MINIMUM:
The current 12-month billing including any charges for power factor correction shall
be not less than $10.00 per kW of the highest demand established during the current 12-
month period provided that such highest demand shall be adjusted by the elimination of
any demand occasioned by an operation totally abandoned during such 12-month period.
DEMAND:
The average kW supplied during the 15-minute period of maximum use during the
month as determined by a demand meter.
SPECIAL TERMS AND CONDITIONS:
Customers served at 11 kv or higher shall provide and maintain all transformers and
other necessary equipment on their side of the point of delivery.
Service under this schedule is subject to the Rules and Regulations contained in this
tariff.
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 58, Temporary Power Cost Adjustment Schedule 66, Fixed Cost
Adjustment Schedule 75, Tax Customer Credit Schedule 76 and Energy Efficiency Rider
Adjustment Schedule 91.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

First Revision Sheet 23
Canceling
I.P.U.C. No.28 Original Sheet 23
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 23
Direct Current Fast Charging (DCFC) Pilot - IDAHO
AVAILABLE:
To Customers in the State of Idaho where Company has electric service available.
APPLICABLE:
To general service supplied for electric vehicle DCFC power requirements when
such service taken on the premises is supplied through one meter installation. Customer
shall provide and maintain all transformers and other necessary equipment on their side
of the point of delivery and may be required to enter into a written contract for five (5)
years or longer.
MONTHLY RATE:
The sum of the following charges:
Basic Charge: $625.00
Energy Charge:
First 250,000 kWh 8.9960 per kWh
All Over 250,000 kWh 7.8080 per kWh
Primary Voltage Discount:
If Customer takes service at 11 kv (wye grounded) or higher, they will be
allowed a primary voltage discount of 300 per kW of demand per month.
Customers served at 11 kv or higher shall provide and maintain all transformers
and other necessary equipment on their side of the point of delivery.
Power Factor Adjustment Charge:
If Customer has a reactive kilovolt-ampere (kVAr) meter, they will be subject to a
Power Factor Adjustment charge, as set forth in the Rules & Regulations.
Service under this schedule is subject to the Rules and Regulations contained in this
tariff.
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 58, Temporary Power Cost Adjustment Schedule 66, Fixed Cost
Adjustment Schedule 75, and Energy Efficiency Rider Adjustment Schedule 91.
SPECIAL CONDITIONS:
1. At the option of the Customer, service may be provided under the otherwise
applicable General Service Schedule.
2. A DC Fast Charger is defined for the purposes of eligibility on this rate
schedule as a charging station with a DC connection that has been designed
to recharge the battery of an electric vehicle.
3. An electric vehicle charging site is considered to be broadly available to the
general public for the purposes of eligibility on this rate schedule if it is
available for use by any driver and utilizes at least one CCS-1 standard
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Nineteenth Revision Sheet 25
Canceling
I.P.U.C. No.28 Eighteenth Revision Sheet 25
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 25
EXTRA LARGE GENERAL SERVICE - IDAHO
(Three phase, available voltage)
AVAILABLE:
To Customers in the State of Idaho where Company has electric service available.
APPLICABLE:
To general service supplied for all power requirements when all such service taken on the
premises is supplied through one meter installation for a demand of not less than 2,500 kVA but not
greater than 25,000 kVA. The average of the Customer's demand for the most recent twelve-
month period must fall within these demand limits for service under this schedule. If the Customer
has less than twelve months of billing history, the Customer must have a minimum of six
consecutive billing months of demand of at least 2,500 kVA in order to receive service under this
schedule. New Customers must meet the above criteria or otherwise provide the Company with
reasonable assurance that their peak demand will average at least 2,500 kVA. Customer shall
provide and maintain all transformers and other necessary equipment on his side of the point of
delivery and enter into a written contract for five (5)years or longer.
MONTHLY RATE: The sum of the following demand and energy charges:
Energy Charge:
First 500,000 kWh 5.9300 per kWh
All Over 500,000 kWh 4.9680 per kWh
Demand Charge:
$19,000.00 for the first 3,000 kVA of demand or less.
$7.25 per kVA for each additional kVA of demand.
Primary Voltage Discount:
If Customer takes service at 11 kV (wye grounded)or higher, he will be allowed a
primary voltage discount of 400 per kVA of demand per month.
Minimum:
The demand charge unless a higher minimum is required under contract to cover
special conditions.
ANNUAL MINIMUM: $832,200
Any annual minimum deficiency will be determined during the April billing cycle for the
previous 12-month period. For a customer who has taken service on this schedule for less than
12 months, the annual minimum will be prorated based on the actual months of service. The annual
minimum will also be prorated if base rates change during the 12-month period. The annual minimum
is based on 916,667 kWh's per month (11,000,000 kWh's annually), plus twelve months multiplied by
the monthly minimum demand charge for the first 3,000 kVa of demand. The annual minimum
reflected above is based on base revenues only. Any other revenues paid by customers in their billed
rates (such as the DSM Tariff Rider Schedule 91) do not factor in to the annual minimum calculation.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Twentieth Revision Sheet 25P
Canceling
I.P.U.C. No.28 Nineteenth Revision Sheet 25P
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 25P
EXTRA LARGE GENERAL SERVICE TO CLEARWATER PAPER'S FACILITY- IDAHO
(Three phase, available voltage)
AVAILABLE:
To Clearwater Paper Corporation's Lewiston, Idaho Facility.
APPLICABLE:
To general service supplied for all power requirements with a demand of not less than
2,500 kVA but not greater than 110,000 kVA. The average of the Customer's demand for
the most recent twelve-month period must fall within these demand limits for service under
this schedule. Customer shall provide and maintain all transformers and other necessary
equipment on its side of the point of delivery and enter into a written contract for five (5)
years or longer.
MONTHLY RATE: The sum of the following demand and energy charges:
Energy Charge:
Block 1 Retail Meter 4.1370 per kWh
Block 2 Generation Meter 3.6240 per kWh
Demand Charge as measured at the Retail Meter:
$19,000.00 for the first 3,000 kVA of demand or less.
1S' Demand Block: $7.25 per kVA for each additional kVA of demand up to
55,000 kVA.
2nd Demand Block: $3.25 per kVA for each additional kVA of demand above
55,000 kVA.
Primary Voltage Discount as measured at the Retail Meter:
If Customer takes service at 11 kV(wye grounded)or higher, it will be allowed
a primary voltage discount of 400 per kVA of demand per month.
Minimum:
The demand charge unless a higher minimum is required under contract to
cover special conditions.
ANNUAL MINIMUM: $683,070
Any annual minimum deficiency will be determined during the April billing cycle for the
previous 12-month period. The annual minimum is based on 916,667 kWh's per month priced
at the Block 1 per kWh rate, plus twelve months multiplied by the monthly minimum demand
charge for the first 3,000 kVa of demand. The annual minimum reflected above is based on
base revenues only. Any other revenues paid in billed rates (such as the DSM Tariff Rider
Schedule 91) do not factor into the annual minimum calculation.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
�J By Patrick Ehrbar, Director of Regulatory Affairs
�T

Nineteenth Revision Sheet 31
Canceling
I.P.U.C. No.28 Eighteenth Revision Sheet 31
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 31
PUMPING SERVICE - IDAHO
(Available phase and voltage)
AVAILABLE:
To Customers in the State of Idaho where Company has electric service available.
APPLICABLE:
To service through one meter for pumping water or water effluents, including
incidental power used for other equipment and lighting essential to the pumping operation.
For such incidental service, Customer will furnish any transformers and other necessary
equipment. Customer may be required to enter into a written contract for five (5) years or
longer and will have service available on a continuous basis unless there is a change in
ownership or control of property served.
MONTHLY RATE:
The sum of the following charges:
$20.00 Basic Charge, plus
Energy Charge:
12.4870 per kWh for the first 85 KWh per kW of demand, and for the next 80
KWh per kW of demand but not more than 3,000 KWh.
10.5460 per KWh for all additional KWh.
Annual Minimum:
$12.00 per kW of the highest demand established in the current year ending
with the November billing cycle. If no demand occurred in the current year, the
annual minimum will be based on the highest demand in the latest previous
year having a demand.
Demand:
The average kW supplied during the 15-minute period of maximum use during
the month determined, at the option of Company, by a demand meter or
nameplate input rating of pump motor.
SPECIAL TERMS AND CONDITIONS:
If Customer requests the account to be closed by reason of change in ownership or
control of property, the unbilled service and any applicable annual minimum will be
prorated to the date of closing.
Service under this schedule is subject to the Rules and Regulations contained in
this tariff.
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 58, Temporary Power Cost Adjustment Schedule 66, Fixed Cost
Adjustment Schedule 75, Tax Customer Credit Schedule 76 and Energy Efficiency Rider
Adjustment Schedule 91.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Eighteenth Revision Sheet 42
Canceling
I.P.U.C. No. 28 Seventeenth Revision Sheet 42
AVISTA CORPORATION
dba Avista Utilities
SCHEDULE 42
COMPANY OWNED STREET LIGHT SERVICE - IDAHO
(Single phase and available voltage)
AVAILABLE:
To agencies of local, state, or federal governments in all Idaho territory
served by Company.
APPLICABLE:
To annual operation of dusk-to-dawn lighting for public streets and
thoroughfares upon receipt of an authorized application. Closed to new
installations of sodium vapor lamps as of January 1, 2018, except where
Company and customer agree, sodium vapor lamps may be installed to provide
compatibility with existing light sources.
MONTHLY RATE:
Metal Standard Pole Facility
Developer
Fixture & Size Standard Pedestal Base Direct Burial Contributed
Code Rate Code Rate Code Rate Code Rate
Single High-Pressure Sodium Vapor
(Nominal Rating in Watts)
50W 235 $12.69 234# $15.84
100W 434# $16.64
100W 431/435 $15.43 432 $29.15 433 $29.15 436 $16.15
20OW 531/535 $25.58 532 $39.26 533 $39.26 536 $26.36
250W 631/635 $30.03 632 $43.71 633 $43.71 636 $30.80
40OW 831/835 $45.06 832 $58.77
Single High-Pressure Sodium Vapor
(Nominal Rating in Watts)
100W 446 $32.45
20OW 542 $66.50 546 $51.93
#Decorative Curb
Decorative Sodium Vapor
100W Granville 474* $30.11
100W Post Top 484* $28.90
10OW Kim Light 438** $16.66
*16'fiberglass pole
**25'fiberglass pole
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Fifteenth Revision Sheet 42A
Canceling
I.P.U.C. No. 28 Fourteenth Revision Sheet 42A
AVISTA CORPORATION
dba Avista Utilities
SCHEDULE 42A - Continued
MONTHLY RATE:
Metal Standard Pole Facility
Developer
Fixture & Size Standard Pedestal Base Direct Burial Contributed
Code Rate Code Rate Code Rate Code Rate
Single Light Emitting Diode (LED)
(Nominal Rating in Watts)
70W 935L $13.27 434L# $16.64
70W 431/435L $15.43 432L $29.15 433L $29.15 436L $16.15
107W 531/535L $25.58 532L $39.26 533L $39.26 536L $26.36
248W 831/835L $45.06 832L $58.77 833L $56.87 836L $44.33
Double Light Emitting Diode (LED)
(Nominal Rating in Watts)
70W 441 L $32.45 442L $46.25 446L $32.45
107W 545L $51.16 542L $66.50 546L $51.93
#Decorative Curb
Decorative LED
70W Granville 475L $22.11 474L* $30.11
70W Post Top 484L* $28.90
70W (30ft Fiberglass Pole) 494L $28.19
70W (35' Fiberglass Pole) 594L $31.07
*16' fiberglass pole
Custom Street Light Calculation
Customers who choose to add street light fixtures that are outside of the offerings listed above will
be quoted a fixed monthly rate based on the following rate calculation. The three components
detailed below will be added together to develop the new Schedule 42 rate.
Step 1 —The capital component will be determined by multiplying an engineering estimate of the
installed cost of the new light component, or fixture, by the Capital Recovery Factor of 10.988%.
Step 2—The maintenance component will either be the embedded maintenance cost of a similar
existing fixture or an engineering estimate of the maintenance cost of a new fixture. The
maintenance component for an existing light can be derived by subtracting the Schedule 46
(energy) light code monthly charge from the same Schedule 44 light code monthly charge
(maintenance and energy).
Step 3—The energy component will be the energy cost of the same wattage light under Schedule
46.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Eighteenth Revision Sheet 44
Canceling
I.P.U.C. No.28 Seventeenth Revision Sheet 44
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 44
CUSTOMER OWNED STREET LIGHT ENERGY AND MAINTENANCE SERVICE -
IDAHO
HIGH-PRESSURE SODIUM VAPOR
(Single phase and available voltage)
AVAILABLE:
To agencies of local, state, or federal governments in all Idaho territory served by
Company. Closed to new installations effective January 1, 2016.
APPLICABLE:
To annual operation of dusk-to-dawn lighting for public streets and thoroughfares
upon receipt of an authorized application.
MONTHLY RATE:
Pole Facility
Metal Standard
Fixture & Size Developer
(Lumens) No Pole Pedestal Base Direct Burial Contributed
Code Rate Code Rate Code Rate Code Rate
Single High-Pressure
Sodium Vapor
100W 435 $11.78 432 $11.78
20OW 535 $17.77 532 $17.77
250W 635 $19.97 632 $19.97 633 $19.97
40OW 835 $31.82 832 $31.83
150W 936 $15.46
SPECIAL TERMS AND CONDITIONS:
Customer is responsible for financing, installing and owning standards, luminaries
and necessary circuitry and related facilities to connect with Company designated points of
delivery. All such facilities will conform to Company's design, standards and
specifications. Customer is also responsible for painting (if desired) and replacing
damaged pole facilities.
Company will furnish the necessary energy, repairs and maintenance work
including lamp and glassware cleaning and replacement. Repairs and maintenance work
will be performed by Company during regularly scheduled working hours.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Eighteenth Revision Sheet 45
Canceling
I.P.U.C. No.28 Seventeenth Revision Sheet 45
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 45
CUSTOMER OWNED STREET LIGHT ENERGY SERVICE - IDAHO
(Single phase and available voltage)
AVAILABLE:
To agencies of local, state, or federal governments in all Idaho territory
served by Company. Closed to new installations as of November 24, 1981, except
where Company and customer agree, mercury vapor lamps may be installed to
provide compatibility with existing light sources.
APPLICABLE:
To annual operation of lighting for public streets and thoroughfares upon
receipt of an authorized application.
MONTHLY RATE:
Per Luminaire
Dusk to
Fixture Dawn
& Size Service
Lumens Code Rate
Mercury Vapor
10000 515 $8.65
20000# 615 15.71
#Also includes Metal Halide.
SPECIAL TERMS AND CONDITIONS:
Customer is responsible for financing, installing, owning, maintaining and
replacing all standards, luminaires, and necessary circuitry and related facilities to
connect with Company designated points of delivery. Customer will also provide a
light sensitive relay and/or time switch in order to control the hours that energy will
be provided.
Company is responsible only for the furnishing of energy to the point of
delivery and the billing and accounting related thereto.
Service under this schedule is subject to the Rules and Regulations
contained in this tariff.
The above Monthly Rates are subject to increases as set forth in Tax
Adjustment Schedule 58, Temporary Power Cost Adjustment Schedule 66, Tax
Customer Credit Schedule 76 and Energy Efficiency Rider Adjustment Schedule
91.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Eighteenth Revision Sheet 46
Canceling
I.P.U.C. No.28 Seventeenth Revision Sheet 46
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 46
CUSTOMER OWNED STREET LIGHT ENERGY SERVICE - IDAHO
HIGH-PRESSURE SODIUM VAPOR
(Single phase and available voltage)
AVAILABLE:
To agencies of local, state, or federal governments in all Idaho territory
served by Company.
APPLICABLE:
To annual operation of lighting for public streets and thoroughfares upon
receipt of an authorized application.
MONTHLY RATE:
Fixture Per Luminaire
& Size Dusk to Dawn Service
Lumens Code Rate
High-Pressure Sodium Vapor
(Nominal Rating in Watts)
100W 435 $ 5.36
20OW 535 10.02
250W 635 12.33
310W 735 14.65
40OW 835 18.70
150W 935 7.74
LED
01 — 10W 005L $ 0.23
11 —20W 015L 0.58
21 — 30W 025L 1.03
31 —40W 035L 1.49
41 — 50W 045L 1.90
51 —60W 055L 2.28
61 — 70W 065L 2.63
71 — 80W 075L 3.08
81 — 90W 085L 3.54
91 — 100W 095L 3.89
101 — 110W 105L 4.35
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Seventh Revision Sheet 46A
Canceling
I.P.U.C. No.28 Sixth Revision Sheet 46A
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 46A - Continued
MONTHLY RATE:
Fixture Per Luminaire
& Size Dusk to Dawn Service
Lumens Code Rate
111 - 120W 115L $ 4.68
121 - 130W 125L 5.14
131 - 140W 135L 5.59
141 - 150W 145L 5.94
151 - 160W 155L 6.39
161 - 170W 165L 6.74
171 - 180W 175L 7.20
181 - 190W 185L 7.66
191 - 20OW 195L 8.00
201 - 225W 212L 8.80
226 - 250W 237L 9.83
SPECIAL TERMS AND CONDITIONS:
Customer is responsible for financing, installing, owning, maintaining and
replacing all standards, luminaires, and necessary circuitry and related facilities to
connect with Company designated points of delivery. Customer will also provide a
light sensitive relay and/or time switch in order to control the hours that energy will be
provided.
Company is responsible only for the furnishing of energy to the point of
delivery and the billing and accounting related thereto.
Service under this schedule is subject to the Rules and Regulations
contained in this tariff.
The above Monthly Rates are subject to increases as set forth in Tax
Adjustment Schedule 58, Temporary Power Cost Adjustment Schedule 66, Tax
Customer Credit Schedule 76 and Energy Efficiency Rider Adjustment Schedule 91.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Eighteenth Revision Sheet 47
Canceling
I.P.U.C. No.28 Seventeenth Revision Sheet 47
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 47
AREA LIGHTING - MERCURY VAPOR - IDAHO
(Single phase and available voltage)
AVAILABLE:
In all Idaho territory served by Company where existing secondary
distribution facilities are of adequate capacity, phase, and voltage.
APPLICABLE:
To annual operation of dusk-to-dawn area lighting with mercury vapor lamps
upon receipt of a Customer contract for five (5) years or more. Mercury vapor
lamps will be available only to those customers receiving service on October 23,
1981.
MONTHLY RATE:
Charge per Unit
Nominal Lumens)
7,000 10,000 20,000
Luminaire (on existing standard) $ 18.00 $ 21.81 $ 30.95
Luminaire and Standard:
30-foot wood pole 22.53 26.36 35.50
Galvanized steel standards:
25 foot 42.60
Monthly Rate
per Pole
Pole Facility
30-foot wood pole $ 7.42
55-foot wood pole 14.37
20-foot fiberglass-direct burial 7.42
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Seventeenth Revision Sheet 49
Canceling
I.P.U.C. No.28 Sixteenth Revision Sheet 49
AVISTA CORPORATION
dba Avista Utilities
SCHEDULE 49
AREA LIGHTING - IDAHO
(Single phase and available voltage)
AVAILABLE:
In all territory served by the Company where existing secondary distribution facilities
are of adequate capacity, phase, and voltage.
APPLICABLE:
To annual operation of dusk-to-dawn area lighting with high-pressure sodium vapor
lamps upon receipt of a Customer contract for five (5)years or more.
MONTHLY RATE:
HIGH PRESSURE SODIUM VAPOR Charge per Unit
(Nominal Rating in Watts)
Luminaire 100W 20OW 250W 40OW
Cobrahead $14.37 $19.00 $21.96 $28.18
Decorative Curb $14.37
100W Post Top w/16-foot decorative pole $34.66
100W Kim Light w/25-foot fiberglass pole $21.79
40OW Flood (No pole) $34.43
LIGHT EMITTING DIODE (LED) Charge per Unit
(Nominal Rating in Watts)
Luminaire 70W 107W 125W 248W
Cobrahead $14.37 $19.00 $28.18
Decorative Curb $14.37
70W Granville w/16-foot decorative pole $38.01
70W Post Top w/16-foot decorative pole $34.66
70W 30ft fiberglass direct buried $28.19
107W 35ft fiberglass direct buried $32.78
125W Flood (No Pole) $17.48
125W Flood (40ft Pole) $29.68
248W Flood (No Pole) $34.43
Pole Facility Monthly Rate per Pole
30-foot wood pole $ 7.42
40-foot wood pole $ 12.18
55-foot wood pole $ 14.32
20-foot fiberglass $ 7.42
25-foot galvanized steel standard $ 11.58
30-foot galvanized steel standard* $ 12.79
25-foot galvanized aluminum standard* $ 14.13
30-foot fiberglass-pedestal base $ 35.40
30-foot steel-pedestal base $ 32.67
35 foot steel direct buried $ 32.67
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Twelfth Revision Sheet 49A
Canceling
I.P.U.C. No.28 Eleventh Revision Sheet 49A
AVISTA CORPORATION
dba Avista Utilities
SCHEDULE 49A — Continued
Custom Area Light Calculation
Customers who choose to add area light fixtures that are outside of the offerings listed
above will be quoted a fixed monthly rate based on the following rate calculation. The
three components detailed below will be added together to develop the new Schedule 49
rate.
Step 1 —The capital component will be determined by multiplying an engineering
estimate of the installed cost of the new area light component, or fixture, by the Capital
Recovery Factor of 10.988.
Step 2 —The maintenance component will be an engineering estimate of the
maintenance cost of a new fixture.
Step 3—The energy component will be the energy cost of the same wattage light under
Schedule 46.
SPECIAL TERMS AND CONDITIONS:
The Company will install, own, and maintain the facilities for supplying dusk-to-
dawn area lighting service using overhead circuits. At the request of Customer, Company
will install underground cable for such service provided Customer, in advance of
construction, pays Company the excess cost of such installation.
The Company will furnish the necessary energy, repairs, and maintenance work
including lamp and glassware replacement. Repairs and maintenance work will be
performed by Company during regularly scheduled working hours. Individual lamps will
be replaced on burnout as soon as reasonably possible after notification by Customer
and subject to Company's operating schedules and requirements.
The Company will assess the Customer the following removal charges if the
Customer requests to discontinue service under this schedule within the initial five-year
contract period:
$25 per luminaire $75 per pole
Service under this schedule is subject to the Rules and Regulations contained in
this tariff.
The above Monthly Rates are subject to increases as set forth in Tax Adjustment
Schedule 58, Temporary Power Cost Adjustment Schedule 66, Energy Efficiency Rider
Tax Customer Credit Schedule 76 and Adjustment Schedule 91.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Eighteenth Revision Sheet 1
Canceling
I.P.U.C. No.28 Seventeenth Revision Sheet 1
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE1
RESIDENTIAL SERVICE - IDAHO
(Single phase & available voltage)
AVAILABLE:
To Customers in the State of Idaho where Company has electric service available.
APPLICABLE:
To service for domestic purposes in each individual residence, apartment, mobile
home, or other living unit when all such service used on the premises is supplied through
a single meter.
Where a portion of a dwelling is used regularly for the conduct of business or
where a portion of the electricity supplied is used for other than domestic purposes, the
appropriate general service schedule is applicable. However, if the service for all
domestic purposes is metered separately, this schedule will be applied to such service.
When two or more living units are served through a single meter, the appropriate general
service schedule is applicable.
MONTHLY RATE:
$20.00 Basic Charge, plus
First 600 kWh 9.1520 per kWh
All over 600 kWh 10.2860, per kWh
Monthly Minimum Charge: $20.00
OPTIONAL SEASONAL MONTHLY CHARGE:
A$20.00 monthly charge shall apply to Customers who close their account on a
seasonal or intermittent basis, provided no energy usage occurs during an entire monthly
billing cycle while the account is closed. Customers choosing this option are required to
notify the Company in writing or by phone in advance and the account will be closed at
the start of the next billing cycle following notification. If energy is used during a monthly
billing cycle, the above listed energy charges and basic charge of$20.00 shall apply.
SPECIAL TERMS AND CONDITIONS:
Service under this schedule is subject to the Rules and Regulations contained in
this tariff.
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 58, Residential and Farm Energy Rate Adjustment Schedule 59,
Temporary Power Cost Adjustment Schedule 66, Fixed Cost Adjustment Mechanism
Schedule 75, Tax Customer Credit Schedule 76 and Energy Efficiency Rider Adjustment
Schedule 91.
Issued June 28, 2024 Effective September 1, 2024
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs
��C'

Eighteenth Revision Sheet 11
Canceling
I.P.U.C. No.28 Seventeenth Revision Sheet 11
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 11
GENERAL SERVICE - IDAHO
(Available phase and voltage)
AVAILABLE:
To Customers in the State of Idaho where Company has electric service
available.
APPLICABLE:
To general service supplied for all power requirements when all such service
taken on the premises is supplied through one meter installation.
MONTHLY RATE:
The sum of the following charges:
$20.00 Basic Charge, plus
Energy Charge:
First 3650 kWh 9.2110 per kWh
All Over 3650 kWh per kWh
Demand Charge:
No charge for the first 20 kW of demand.
" per kW for each additional kW of demand.
Minimum:
$20.00 for single phase service and $27.10 for three phase service;
unless a higher minimum is required under contract to cover special
conditions.
DEMAND:
The average kW supplied during the 15-minute period of maximum use
during the month as determined by a demand meter.
SPECIAL TERMS AND CONDITIONS:
Service under this schedule is subject to the Rules and Regulations
contained in this tariff.
The above Monthly Rates are subject to increases or decreases as set forth
in Tax Adjustment Schedule 58, Temporary Power Cost Adjustment Schedule 66,
Fixed Cost Adjustment Mechanism Schedule 75, Tax Customer Credit Schedule 76
and Energy Efficiency Rider Adjustment Schedule 91.
Issued June 28, 2024 Effective September 1, 2024
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Eighteenth Revision Sheet 21
Canceling
I.P.U.C. No.28 Seventeenth Revision Sheet 21
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 21
LARGE GENERAL SERVICE - IDAHO
(Available phase and voltage)
AVAILABLE:
To Customers in the State of Idaho where Company has electric service available.
APPLICABLE:
To general service supplied for all power requirements when all such service taken
on the premises is supplied through one meter installation. Customer shall provide and
maintain all transformers and other necessary equipment on his side of the point of
delivery and may be required to enter into a written contract for five (5) years or longer.
MONTHLY RATE:
The sum of the following demand and energy charges:
Energy Charge:
First 250,000 kWh 7.1700 per kWh
All Over 250,000 kWh 60.0420 per kWh
Demand Charge:
$525.00 for the first 50 kW of demand or less.
" per kW for each additional kW of demand.
Primary Voltage Discount:
If Customer takes service at 11 kv (wye grounded) or higher, he will be
allowed a primary voltage discount of 400 per kW of demand per month.
Power Factor Adjustment Charge:
If Customer has a reactive kilovolt-ampere (kVAr) meter, he will be subject to
a Power Factor Adjustment charge, as set forth in the Rules & Regulations.
Minimum:
$525.00, unless a higher minimum is required under contract to cover special
conditions.
ANNUAL MINIMUM:
The current 12-month billing including any charges for power factor correction shall
be not less than $10.00 per kW of the highest demand established during the current 12-
month period provided that such highest demand shall be adjusted by the elimination of
any demand occasioned by an operation totally abandoned during such 12-month period.
DEMAND:
The average kW supplied during the 15-minute period of maximum use during the
month as determined by a demand meter.
SPECIAL TERMS AND CONDITIONS:
Customers served at 11 kv or higher shall provide and maintain all transformers and
other necessary equipment on their side of the point of delivery.
Service under this schedule is subject to the Rules and Regulations contained in this
tariff.
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 58, Temporary Power Cost Adjustment Schedule 66, Fixed Cost
Adjustment Schedule 75, Tax Customer Credit Schedule 76 and Energy Efficiency Rider
Adjustment Schedule 91.
Issued June 28, 2024 Effective September 1, 2024
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

I.P.U.C. No.28 Original Sheet 23
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 23
Direct Current Fast Charging (DCFC) Pilot - IDAHO
AVAILABLE:
To Customers in the State of Idaho where Company has electric service available.
APPLICABLE:
To general service supplied for electric vehicle DCFC power requirements when
such service taken on the premises is supplied through one meter installation. Customer
shall provide and maintain all transformers and other necessary equipment on their side
of the point of delivery and may be required to enter into a written contract for five (5)
years or longer.
MONTHLY RATE:
The sum of the following charges:
Basic Charge: $500.00
Energy Charge:
First 250,000 kWh 8.5090 per kWh
All Over 250,000 kWh 7.3860 per kWh
Primary Voltage Discount:
If Customer takes service at 11 kv (wye grounded) or higher, they will be
allowed a primary voltage discount of 300 per kW of demand per month.
Customers served at 11 kv or higher shall provide and maintain all transformers
and other necessary equipment on their side of the point of delivery.
Power Factor Adjustment Charge:
If Customer has a reactive kilovolt-ampere (kVAr) meter, they will be subject to a
Power Factor Adjustment charge, as set forth in the Rules & Regulations.
Service under this schedule is subject to the Rules and Regulations contained in this
tariff.
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 58, Temporary Power Cost Adjustment Schedule 66, Fixed Cost
Adjustment Schedule 75, and Energy Efficiency Rider Adjustment Schedule 91.
SPECIAL CONDITIONS:
1. At the option of the Customer, service may be provided under the otherwise
applicable General Service Schedule.
2. A DC Fast Charger is defined for the purposes of eligibility on this rate
schedule as a charging station with a DC connection that has been designed
to recharge the battery of an electric vehicle.
3. An electric vehicle charging site is considered to be broadly available to the
general public for the purposes of eligibility on this rate schedule if it is
available for use by any driver and utilizes at least one CCS-1 standard
Issued April 5, 2024 Effective April 1, 2024
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Eighteenth Revision Sheet 25
Canceling
I.P.U.C. No.28 Seventeenth Revision Sheet 25
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 25
EXTRA LARGE GENERAL SERVICE - IDAHO
(Three phase, available voltage)
AVAILABLE:
To Customers in the State of Idaho where Company has electric service available.
APPLICABLE:
To general service supplied for all power requirements when all such service taken on the
premises is supplied through one meter installation for a demand of not less than 2,500 kVA but not
greater than 25,000 kVA. The average of the Customer's demand for the most recent twelve-
month period must fall within these demand limits for service under this schedule. If the Customer
has less than twelve months of billing history, the Customer must have a minimum of six
consecutive billing months of demand of at least 2,500 kVA in order to receive service under this
schedule. New Customers must meet the above criteria or otherwise provide the Company with
reasonable assurance that their peak demand will average at least 2,500 kVA. Customer shall
provide and maintain all transformers and other necessary equipment on his side of the point of
delivery and enter into a written contract for five (5)years or longer.
MONTHLY RATE: The sum of the following demand and energy charges:
Energy Charge:
First 500,000 kWh 5.6890 per kWh
All Over 500,000 kWh 4.7660 per kWh
Demand Charge:
$17,990.00 for the first 3,000 kVA of demand or less.
$6-.2-5 per kVA for each additional kVA of demand.
Primary Voltage Discount:
If Customer takes service at 11 kV (wye grounded) or higher, he will be allowed a
primary voltage discount of 400 per kVA of demand per month.
Minimum:
The demand charge unless a higher minimum is required under contract to cover
special conditions.
ANNUAL MINIMUM: $783 640
Any annual minimum deficiency will be determined during the April billing cycle for the
previous 12-month period. For a customer who has taken service on this schedule for less than
12 months, the annual minimum will be prorated based on the actual months of service. The annual
minimum will also be prorated if base rates change during the 12-month period. The annual minimum
is based on 916,667 kWh's per month (11,000,000 kWh's annually), plus twelve months multiplied by
the monthly minimum demand charge for the first 3,000 kVa of demand. The annual minimum
reflected above is based on base revenues only. Any other revenues paid by customers in their billed
rates (such as the DSM Tariff Rider Schedule 91)do not factor in to the annual minimum calculation.
Issued June 28, 2024 Effective September 1, 2024
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Nineteenth Revision Sheet 25P
Canceling
I.P.U.C. No.28 Eighteenth Revision Sheet 25P
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 25P
EXTRA LARGE GENERAL SERVICE TO CLEARWATER PAPER'S FACILITY - IDAHO
(Three phase, available voltage)
AVAILABLE:
To Clearwater Paper Corporation's Lewiston, Idaho Facility.
APPLICABLE:
To general service supplied for all power requirements with a demand of not less than
2,500 kVA but not greater than 110,000 kVA. The average of the Customer's demand for
the most recent twelve-month period must fall within these demand limits for service under
this schedule. Customer shall provide and maintain all transformers and other necessary
equipment on its side of the point of delivery and enter into a written contract for five (5)
years or longer.
MONTHLY RATE: The sum of the following demand and energy charges:
Energy Charge:
Block 1 Retail Meter 4.2530 per kWh
Block 2 Generation Meter 3.6240 per kWh
Demand Charge as measured at the Retail Meter:
$17,00&90 for the first 3,000 kVA of demand or less.
1 st Demand Block: $6-.25 per kVA for each additional kVA of demand up to
55,000 kVA.
2nd Demand Block: " per kVA for each additional kVA of demand above
55,000 kVA.
Primary Voltage Discount as measured at the Retail Meter:
If Customer takes service at 11 kV(wye grounded)or higher, it will be allowed
a primary voltage discount of 400 per kVA of demand per month.
Minimum:
The demand charge unless a higher minimum is required under contract to
cover special conditions.
ANNUAL MINIMUM: $671,830
Any annual minimum deficiency will be determined during the April billing cycle for the
previous 12-month period. The annual minimum is based on 916,667 kWh's per month priced
at the Block 1 per kWh rate, plus twelve months multiplied by the monthly minimum demand
charge for the first 3,000 kVa of demand. The annual minimum reflected above is based on
base revenues only. Any other revenues paid in billed rates (such as the DSM Tariff Rider
Schedule 91) do not factor into the annual minimum calculation.
Issued June 28, 2024 Effective September 1, 2024
Issued by Avista Utilities
�J By Patrick Ehrbar, Director of Regulatory Affairs
�T

Eighteenth Revision Sheet 31
Canceling
I.P.U.C. No.28 Seventeenth Revision Sheet 31
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 31
PUMPING SERVICE - IDAHO
(Available phase and voltage)
AVAILABLE:
To Customers in the State of Idaho where Company has electric service available.
APPLICABLE:
To service through one meter for pumping water or water effluents, including
incidental power used for other equipment and lighting essential to the pumping operation.
For such incidental service, Customer will furnish any transformers and other necessary
equipment. Customer may be required to enter into a written contract for five (5) years or
longer and will have service available on a continuous basis unless there is a change in
ownership or control of property served.
MONTHLY RATE:
The sum of the following charges:
$20.00 Basic Charge, plus
Energy Charge:
0 per kWh for the first 85 KWh per kW of demand, and for the next 80
KWh per kW of demand but not more than 3,000 KWh.
9.7310 per KWh for all additional KWh.
Annual Minimum:
$12.00 per kW of the highest demand established in the current year ending
with the November billing cycle. If no demand occurred in the current year, the
annual minimum will be based on the highest demand in the latest previous
year having a demand.
Demand:
The average kW supplied during the 15-minute period of maximum use during
the month determined, at the option of Company, by a demand meter or
nameplate input rating of pump motor.
SPECIAL TERMS AND CONDITIONS:
If Customer requests the account to be closed by reason of change in ownership or
control of property, the unbilled service and any applicable annual minimum will be
prorated to the date of closing.
Service under this schedule is subject to the Rules and Regulations contained in
this tariff.
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 58, Temporary Power Cost Adjustment Schedule 66, Fixed Cost
Adjustment Schedule 75, Tax Customer Credit Schedule 76 and Energy Efficiency Rider
Adjustment Schedule 91.
Issued June 28, 2024 Effective September 1, 2024
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Seventeenth Revision Sheet 42
Canceling
I.P.U.C. No. 28 Sixteenth Revision Sheet 42
AVISTA CORPORATION
dba Avista Utilities
SCHEDULE 42
COMPANY OWNED STREET LIGHT SERVICE - IDAHO
(Single phase and available voltage)
AVAILABLE:
To agencies of local, state, or federal governments in all Idaho territory
served by Company.
APPLICABLE:
To annual operation of dusk-to-dawn lighting for public streets and
thoroughfares upon receipt of an authorized application. Closed to new
installations of sodium vapor lamps as of January 1, 2018, except where
Company and customer agree, sodium vapor lamps may be installed to provide
compatibility with existing light sources.
MONTHLY RATE:
Metal Standard Pole Facility
Developer
Fixture & Size Standard Pedestal Base Direct Burial Contributed
Code Rate Code Rate Code Rate Code Rate
Single High-Pressure Sodium Vapor
(Nominal Rating in Watts)
50W 235 $42.11 234# $19 12
100W 434# $45.89
100W 431/435 $14.73 432 $27.83 433 $27-83 436 $15.42
20OW 531/535 $24-42 532 $27 48 533 $27 43 536 $25.16
250W 631/635 $28.67 632 $41 73 633 $44.73 636 $29 40
40OW 831/835 $43.02 832 $56-10
Single High-Pressure Sodium Vapor
(Nominal Rating in Watts)
100W 446 $30-93
20OW 545 $48.84 542 $63 48 546 $49.57
#Decorative Curb
Decorative Sodium Vapor
100W Granville 474* $28.74
100W Post Top 484* $27.59
10OW Kim Light 438** $15.90
*16'fiberglass pole
**25'fiberglass pole
Issued June 28, 2024 Effective September 1, 2024
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Fourteenth Revision Sheet 42A
Canceling
I.P.U.C. No. 28 Thirteenth Revision Sheet 42A
AVISTA CORPORATION
dba Avista Utilities
SCHEDULE 42A - Continued
MONTHLY RATE:
Metal Standard Pole Facility
Developer
Fixture & Size Standard Pedestal Base Direct Burial Contributed
Code Rate Code Rate Code Rate Code Rate
Single Light Emitting Diode (LED)
(Nominal Rating in Watts)
70W 935L $12 657 434L# $15.99
70W 431/435L $44.73 432L $27.83 433L $27-83 436L $15.42
107W 531/535L $2442 532L $27 48 533L $37.48 536L $25.16
248W 831/835L $43-02 832L $56-10 833L $56-18 836L $43.73
Double Light Emitting Diode (LED)
(Nominal Rating in Watts)
70W 441 L $30-98 442L $44.15 446L $30-98
107W 545L $48.84 542L $63 48 546L $4957
#Decorative Curb
Decorative LED
70W Granville 475L $22.10 474L* $28 74
70W Post Top 484L* $27.59
70W (30ft Fiberglass Pole) 494L $26.91
70W (35' Fiberglass Pole) 594L $29.66
*16' fiberglass pole
Custom Street Light Calculation
Customers who choose to add street light fixtures that are outside of the offerings listed above will
be quoted a fixed monthly rate based on the following rate calculation. The three components
detailed below will be added together to develop the new Schedule 42 rate.
Step 1 -The capital component will be determined by multiplying an engineering estimate of the
installed cost of the new light component, or fixture, by the Capital Recovery Factor of 0.952
Step 2-The maintenance component will either be the embedded maintenance cost of a similar
existing fixture or an engineering estimate of the maintenance cost of a new fixture.The
maintenance component for an existing light can be derived by subtracting the Schedule 46
(energy) light code monthly charge from the same Schedule 44 light code monthly charge
(maintenance and energy).
Step 3-The energy component will be the energy cost of the same wattage light under Schedule
46.
Issued June 28, 2024 Effective September 1, 2024
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Seventeenth Revision Sheet 44
Canceling
I.P.U.C. No.28 Sixteenth Revision Sheet 44
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 44
CUSTOMER OWNED STREET LIGHT ENERGY AND MAINTENANCE SERVICE -
IDAHO
HIGH-PRESSURE SODIUM VAPOR
(Single phase and available voltage)
AVAILABLE:
To agencies of local, state, or federal governments in all Idaho territory served by
Company. Closed to new installations effective January 1, 2016.
APPLICABLE:
To annual operation of dusk-to-dawn lighting for public streets and thoroughfares
upon receipt of an authorized application.
MONTHLY RATE:
Pole Facility
Metal Standard
Fixture & Size Developer
(Lumens) No Pole Pedestal Base Direct Burial Contributed
Code Rate Code Rate Code Rate Code Rate
Single High-Pressure
Sodium Vapor
100W 435 $4425 432 $4425
20OW 535 $46.96 532 $46.96
250W 635 $49-06 632 $49-06 633 $49-06
40OW 835 $30-38 832 $30-39
150W 936 $44 76
SPECIAL TERMS AND CONDITIONS:
Customer is responsible for financing, installing and owning standards, luminaries
and necessary circuitry and related facilities to connect with Company designated points of
delivery. All such facilities will conform to Company's design, standards and
specifications. Customer is also responsible for painting (if desired) and replacing
damaged pole facilities.
Company will furnish the necessary energy, repairs and maintenance work
including lamp and glassware cleaning and replacement. Repairs and maintenance work
will be performed by Company during regularly scheduled working hours.
Issued June 28, 2024 Effective September 1, 2024
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Seventeenth Revision Sheet 45
Canceling
I.P.U.C. No.28 Sixteenth Revision Sheet 45
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 45
CUSTOMER OWNED STREET LIGHT ENERGY SERVICE - IDAHO
(Single phase and available voltage)
AVAILABLE:
To agencies of local, state, or federal governments in all Idaho territory
served by Company. Closed to new installations as of November 24, 1981, except
where Company and customer agree, mercury vapor lamps may be installed to
provide compatibility with existing light sources.
APPLICABLE:
To annual operation of lighting for public streets and thoroughfares upon
receipt of an authorized application.
MONTHLY RATE:
Per Luminaire
Dusk to
Fixture Dawn
& Size Service
Lumens Code Rate
Mercury Vapor
10000 515 $ 8.26
20000# 615 15.-00
#Also includes Metal Halide.
SPECIAL TERMS AND CONDITIONS:
Customer is responsible for financing, installing, owning, maintaining and
replacing all standards, luminaires, and necessary circuitry and related facilities to
connect with Company designated points of delivery. Customer will also provide a
light sensitive relay and/or time switch in order to control the hours that energy will
be provided.
Company is responsible only for the furnishing of energy to the point of
delivery and the billing and accounting related thereto.
Service under this schedule is subject to the Rules and Regulations
contained in this tariff.
The above Monthly Rates are subject to increases as set forth in Tax
Adjustment Schedule 58, Temporary Power Cost Adjustment Schedule 66, Tax
Customer Credit Schedule 76 and Energy Efficiency Rider Adjustment Schedule
91.
Issued June 28, 2024 Effective September 1, 2024
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Seventeenth Revision Sheet 46
Canceling
I.P.U.C. No.28 Sixteenth Revision Sheet 46
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 46
CUSTOMER OWNED STREET LIGHT ENERGY SERVICE - IDAHO
HIGH-PRESSURE SODIUM VAPOR
(Single phase and available voltage)
AVAILABLE:
To agencies of local, state, or federal governments in all Idaho territory
served by Company.
APPLICABLE:
To annual operation of lighting for public streets and thoroughfares upon
receipt of an authorized application.
MONTHLY RATE:
Fixture Per Luminaire
& Size Dusk to Dawn Service
Lumens Code Rate
High-Pressure Sodium Vapor
(Nominal Rating in Watts)
100W 435 $ 5_42
20OW 535 9-.57
250W 635 41.77
310W 735 i 3.99
40OW 835 47.85
150W 935 7-.N
LED
01 - 10W 005L $ 0-.2-3
11 - 20W 015L 0-7
21 - 30W 025L 4-."
31 -40W 035L 4-47
41 - 50W 045L 4-.84
51 - 60W 055L 2-.25
61 - 70W 065L 2-.59
71 - 80W 075L 3-.04
81 - 90W 085L 3-49
91 - 100W 095L 3-84
101 - 110W 105L 4.-9
Issued June 28, 2024 Effective September 1, 2024
Issued by Avista Utilities
�J By Patrick Ehrbar, Director of Regulatory Affairs
�T

Sixth Revision Sheet 46A
Canceling
I.P.U.C. No.28 Fifth Revision Sheet 46A
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 46A - Continued
MONTHLY RATE:
Fixture Per Luminaire
& Size Dusk to Dawn Service
Lumens Code Rate
111 - 120W 115L $ 4-.62
121 - 130W 125L 5- 7
131 - 140W 135L 5-.52
141 - 150W 145L 5-85
151 - 160W 155L
161 - 170W 165L 6-.&5
171 - 180W 175L 7-40
181 - 190W 185L 7-55
191 - 20OW 195L 7-.9-9
201 - 225W 212L 8-.&8
226 - 250W 237L 9 &9
SPECIAL TERMS AND CONDITIONS:
Customer is responsible for financing, installing, owning, maintaining and
replacing all standards, luminaires, and necessary circuitry and related facilities to
connect with Company designated points of delivery. Customer will also provide a
light sensitive relay and/or time switch in order to control the hours that energy will be
provided.
Company is responsible only for the furnishing of energy to the point of
delivery and the billing and accounting related thereto.
Service under this schedule is subject to the Rules and Regulations
contained in this tariff.
The above Monthly Rates are subject to increases as set forth in Tax
Adjustment Schedule 58, Temporary Power Cost Adjustment Schedule 66, Tax
Customer Credit Schedule 76 and Energy Efficiency Rider Adjustment Schedule 91.
Issued June 28, 2024 Effective September 1, 2024
Issued by Avista Utilities
�J By Patrick Ehrbar, Director of Regulatory Affairs
�T

Seventeenth Revision Sheet 47
Canceling
I.P.U.C. No.28 Sixteenth Revision Sheet 47
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 47
AREA LIGHTING - MERCURY VAPOR - IDAHO
(Single phase and available voltage)
AVAILABLE:
In all Idaho territory served by Company where existing secondary
distribution facilities are of adequate capacity, phase, and voltage.
APPLICABLE:
To annual operation of dusk-to-dawn area lighting with mercury vapor lamps
upon receipt of a Customer contract for five (5) years or more. Mercury vapor
lamps will be available only to those customers receiving service on October 23,
1981.
MONTHLY RATE:
Charge per Unit
Nominal Lumens)
7,000 10,000 20,000
Luminaire (on existing standard) $-17..18 $ 29.82 $ 29.55-
Luminaire and Standard:
30-foot wood pole 24.51 25.16 33.89
Galvanized steel standards:
25 foot 49.7
Monthly Rate
per Pole
Pole Facility
30-foot wood pole $ .03
55-foot wood pole 13.72
20-foot fiberglass-direct burial 7:03
Issued June 28, 2024 Effective September 1, 2024
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Sixteenth Revision Sheet 49
Canceling
I.P.U.C. No.28 Fifteenth Revision Sheet 49
AVISTA CORPORATION
dba Avista Utilities
SCHEDULE 49
AREA LIGHTING - IDAHO
(Single phase and available voltage)
AVAILABLE:
In all territory served by the Company where existing secondary distribution facilities
are of adequate capacity, phase, and voltage.
APPLICABLE:
To annual operation of dusk-to-dawn area lighting with high-pressure sodium vapor
lamps upon receipt of a Customer contract for five (5) years or more.
MONTHLY RATE:
HIGH PRESSURE SODIUM VAPOR Charge per Unit
(Nominal Rating in Watts)
Luminaire 100W 200W 250W 400W
Cobrahead $12 = $19.14 $20.96 $263 90
Decorative Curb $13.72
100W Post Top w/16-foot decorative pole $33.09
100W Kim Light w/25-foot fiberglass pole $20.80
400W Flood (No pole) $32R7
LIGHT EMITTING DIODE (LED) Charge per Unit
(Nominal Rating in Watts)
Luminaire 70W 107W 125W 248W
Cobrahead $1272 $IR14 $2sg90
Decorative Curb $1272
70W Granville w/16-foot decorative pole $36.44
70W Post Top w/16-foot decorative pole $33-09
70W 30ft fiberglass direct buried $26.91
107W 35ft fiberglass direct buried $3129
125W Flood (No Pole) $46-69
125W Flood (40ft Pole) $2-8.33
248W Flood (No Pole) $32R7
Pole Facility Monthly Rate per Pole
30-foot wood pole $ 08
40-foot wood pole $11.63
55-foot wood pole $4367
20-foot fiberglass $7 08
25-foot galvanized steel standard $11.055
30-foot galvanized steel standard* $12.21
25-foot galvanized aluminum standard* $13.49
30-foot fiberglass-pedestal base
30-foot steel-pedestal base $31.19
35 foot steel direct buried $3449
Issued June 28, 2024 Effective September 1, 2024
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Eleventh Revision Sheet 49A
Canceling
I.P.U.C. No.28 Tenth Revision Sheet 49A
AVISTA CORPORATION
dba Avista Utilities
SCHEDULE 49A— Continued
Custom Area Light Calculation
Customers who choose to add area light fixtures that are outside of the offerings listed
above will be quoted a fixed monthly rate based on the following rate calculation. The
three components detailed below will be added together to develop the new Schedule 49
rate.
Step 1 —The capital component will be determined by multiplying an engineering
estimate of the installed cost of the new area light component, or fixture, by the Capital
Recovery Factor of 40.952.
Step 2 —The maintenance component will be an engineering estimate of the
maintenance cost of a new fixture.
Step 3 —The energy component will be the energy cost of the same wattage light under
Schedule 46.
SPECIAL TERMS AND CONDITIONS:
The Company will install, own, and maintain the facilities for supplying dusk-to-
dawn area lighting service using overhead circuits. At the request of Customer, Company
will install underground cable for such service provided Customer, in advance of
construction, pays Company the excess cost of such installation.
The Company will furnish the necessary energy, repairs, and maintenance work
including lamp and glassware replacement. Repairs and maintenance work will be
performed by Company during regularly scheduled working hours. Individual lamps will
be replaced on burnout as soon as reasonably possible after notification by Customer
and subject to Company's operating schedules and requirements.
The Company will assess the Customer the following removal charges if the
Customer requests to discontinue service under this schedule within the initial five-year
contract period:
$25 per luminaire $75 per pole
Service under this schedule is subject to the Rules and Regulations contained in
this tariff.
The above Monthly Rates are subject to increases as set forth in Tax Adjustment
Schedule 58, Temporary Power Cost Adjustment Schedule 66, Energy Efficiency Rider
Tax Customer Credit Schedule 76 and Adjustment Schedule 91.
Issued June 28, 2024 Effective September 1, 2024
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Nineteenth Revision Sheet 1
Canceling
I.P.U.C. No.28 Eighteenth Revision Sheet 1
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE1
RESIDENTIAL SERVICE - IDAHO
(Single phase & available voltage)
AVAILABLE:
To Customers in the State of Idaho where Company has electric service available.
APPLICABLE:
To service for domestic purposes in each individual residence, apartment, mobile
home, or other living unit when all such service used on the premises is supplied through
a single meter.
Where a portion of a dwelling is used regularly for the conduct of business or
where a portion of the electricity supplied is used for other than domestic purposes, the
appropriate general service schedule is applicable. However, if the service for all
domestic purposes is metered separately, this schedule will be applied to such service.
When two or more living units are served through a single meter, the appropriate general
service schedule is applicable.
MONTHLY RATE:
$20.00 Basic Charge, plus
First 600 kWh 9.8590 per kWh
All over 600 kWh 11.081¢ per kWh
Monthly Minimum Charge: $20.00
OPTIONAL SEASONAL MONTHLY CHARGE:
A$20.00 monthly charge shall apply to Customers who close their account on a
seasonal or intermittent basis, provided no energy usage occurs during an entire monthly
billing cycle while the account is closed. Customers choosing this option are required to
notify the Company in writing or by phone in advance and the account will be closed at
the start of the next billing cycle following notification. If energy is used during a monthly
billing cycle, the above listed energy charges and basic charge of$20.00 shall apply.
SPECIAL TERMS AND CONDITIONS:
Service under this schedule is subject to the Rules and Regulations contained in
this tariff.
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 58, Residential and Farm Energy Rate Adjustment Schedule 59,
Temporary Power Cost Adjustment Schedule 66, Fixed Cost Adjustment Mechanism
Schedule 75, Tax Customer Credit Schedule 76 and Energy Efficiency Rider Adjustment
Schedule 91.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs
��C'

Nineteenth Revision Sheet 11
Canceling
I.P.U.C. No.28 Eighteenth Revision Sheet 11
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 11
GENERAL SERVICE - IDAHO
(Available phase and voltage)
AVAILABLE:
To Customers in the State of Idaho where Company has electric service
available.
APPLICABLE:
To general service supplied for all power requirements when all such service
taken on the premises is supplied through one meter installation.
MONTHLY RATE:
The sum of the following charges:
$20.00 Basic Charge, plus
Energy Charge:
First 3650 kWh 9.2110 per kWh
All Over 3650 kWh 7.7140 per kWh
Demand Charge:
No charge for the first 20 kW of demand.
8.00 per kW for each additional kW of demand.
Minimum:
$20.00 for single phase service and $27.10 for three phase service;
unless a higher minimum is required under contract to cover special
conditions.
DEMAND:
The average kW supplied during the 15-minute period of maximum use
during the month as determined by a demand meter.
SPECIAL TERMS AND CONDITIONS:
Service under this schedule is subject to the Rules and Regulations
contained in this tariff.
The above Monthly Rates are subject to increases or decreases as set forth
in Tax Adjustment Schedule 58, Temporary Power Cost Adjustment Schedule 66,
Fixed Cost Adjustment Mechanism Schedule 75, Tax Customer Credit Schedule 76
and Energy Efficiency Rider Adjustment Schedule 91.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs
C� .

Nineteenth Revision Sheet 21
Canceling
I.P.U.C. No.28 Eighteenth Revision Sheet 21
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 21
LARGE GENERAL SERVICE - IDAHO
(Available phase and voltage)
AVAILABLE:
To Customers in the State of Idaho where Company has electric service available.
APPLICABLE:
To general service supplied for all power requirements when all such service taken
on the premises is supplied through one meter installation. Customer shall provide and
maintain all transformers and other necessary equipment on his side of the point of
delivery and may be required to enter into a written contract for five (5) years or longer.
MONTHLY RATE:
The sum of the following demand and energy charges:
Energy Charge:
First 250,000 kWh 7.5800 per kWh
All Over 250,000 kWh 6.3870 per kWh
Demand Charge:
625.00 for the first 50 kW of demand or less.
8.00 per kW for each additional kW of demand.
Primary Voltage Discount:
If Customer takes service at 11 kv (wye grounded) or higher, he will be
allowed a primary voltage discount of 400 per kW of demand per month.
Power Factor Adjustment Charge:
If Customer has a reactive kilovolt-ampere (kVAr) meter, he will be subject to
a Power Factor Adjustment charge, as set forth in the Rules & Regulations.
Minimum:
625.00, unless a higher minimum is required under contract to cover special
conditions.
ANNUAL MINIMUM:
The current 12-month billing including any charges for power factor correction shall
be not less than $10.00 per kW of the highest demand established during the current 12-
month period provided that such highest demand shall be adjusted by the elimination of
any demand occasioned by an operation totally abandoned during such 12-month period.
DEMAND:
The average kW supplied during the 15-minute period of maximum use during the
month as determined by a demand meter.
SPECIAL TERMS AND CONDITIONS:
Customers served at 11 kv or higher shall provide and maintain all transformers and
other necessary equipment on their side of the point of delivery.
Service under this schedule is subject to the Rules and Regulations contained in this
tariff.
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 58, Temporary Power Cost Adjustment Schedule 66, Fixed Cost
Adjustment Schedule 75, Tax Customer Credit Schedule 76 and Energy Efficiency Rider
Adjustment Schedule 91.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

First Revision Sheet 23
Canceling
I.P.U.C. No.28 Original Sheet 23
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 23
Direct Current Fast Charging (DCFC) Pilot - IDAHO
AVAILABLE:
To Customers in the State of Idaho where Company has electric service available.
APPLICABLE:
To general service supplied for electric vehicle DCFC power requirements when
such service taken on the premises is supplied through one meter installation. Customer
shall provide and maintain all transformers and other necessary equipment on their side
of the point of delivery and may be required to enter into a written contract for five (5)
years or longer.
MONTHLY RATE:
The sum of the following charges:
Basic Charge: $625.00
Energy Charge:
First 250,000 kWh 8.996� per kWh
All Over 250,000 kWh 7.8080 per kWh
Primary Voltage Discount:
If Customer takes service at 11 kv (wye grounded) or higher, they will be
allowed a primary voltage discount of 300 per kW of demand per month.
Customers served at 11 kv or higher shall provide and maintain all transformers
and other necessary equipment on their side of the point of delivery.
Power Factor Adjustment Charge:
If Customer has a reactive kilovolt-ampere (kVAr) meter, they will be subject to a
Power Factor Adjustment charge, as set forth in the Rules & Regulations.
Service under this schedule is subject to the Rules and Regulations contained in this
tariff.
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 58, Temporary Power Cost Adjustment Schedule 66, Fixed Cost
Adjustment Schedule 75, and Energy Efficiency Rider Adjustment Schedule 91.
SPECIAL CONDITIONS:
1. At the option of the Customer, service may be provided under the otherwise
applicable General Service Schedule.
2. A DC Fast Charger is defined for the purposes of eligibility on this rate
schedule as a charging station with a DC connection that has been designed
to recharge the battery of an electric vehicle.
3. An electric vehicle charging site is considered to be broadly available to the
general public for the purposes of eligibility on this rate schedule if it is
available for use by any driver and utilizes at least one CCS-1 standard
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Nineteenth Revision Sheet 25
Canceling
I.P.U.C. No.28 Eighteenth Revision Sheet 25
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 25
EXTRA LARGE GENERAL SERVICE - IDAHO
(Three phase, available voltage)
AVAILABLE:
To Customers in the State of Idaho where Company has electric service available.
APPLICABLE:
To general service supplied for all power requirements when all such service taken on the
premises is supplied through one meter installation for a demand of not less than 2,500 kVA but not
greater than 25,000 kVA. The average of the Customer's demand for the most recent twelve-
month period must fall within these demand limits for service under this schedule. If the Customer
has less than twelve months of billing history, the Customer must have a minimum of six
consecutive billing months of demand of at least 2,500 kVA in order to receive service under this
schedule. New Customers must meet the above criteria or otherwise provide the Company with
reasonable assurance that their peak demand will average at least 2,500 kVA. Customer shall
provide and maintain all transformers and other necessary equipment on his side of the point of
delivery and enter into a written contract for five (5)years or longer.
MONTHLY RATE: The sum of the following demand and energy charges:
Energy Charge:
First 500,000 kWh 5.9300 per kWh
All Over 500,000 kWh 4.9680 per kWh
Demand Charge:
$19,000.00 for the first 3,000 kVA of demand or less.
7.25 per kVA for each additional kVA of demand.
Primary Voltage Discount:
If Customer takes service at 11 kV (wye grounded)or higher, he will be allowed a
primary voltage discount of 400 per kVA of demand per month.
Minimum:
The demand charge unless a higher minimum is required under contract to cover
special conditions.
ANNUAL MINIMUM: $832,200
Any annual minimum deficiency will be determined during the April billing cycle for the
previous 12-month period. For a customer who has taken service on this schedule for less than
12 months, the annual minimum will be prorated based on the actual months of service. The annual
minimum will also be prorated if base rates change during the 12-month period. The annual minimum
is based on 916,667 kWh's per month (11,000,000 kWh's annually), plus twelve months multiplied by
the monthly minimum demand charge for the first 3,000 kVa of demand. The annual minimum
reflected above is based on base revenues only. Any other revenues paid by customers in their billed
rates (such as the DSM Tariff Rider Schedule 91) do not factor in to the annual minimum calculation.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Twentieth Revision Sheet 25P
Canceling
I.P.U.C. No.28 Nineteenth Revision Sheet 25P
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 25P
EXTRA LARGE GENERAL SERVICE TO CLEARWATER PAPER'S FACILITY- IDAHO
(Three phase, available voltage)
AVAILABLE:
To Clearwater Paper Corporation's Lewiston, Idaho Facility.
APPLICABLE:
To general service supplied for all power requirements with a demand of not less than
2,500 kVA but not greater than 110,000 kVA. The average of the Customer's demand for
the most recent twelve-month period must fall within these demand limits for service under
this schedule. Customer shall provide and maintain all transformers and other necessary
equipment on its side of the point of delivery and enter into a written contract for five (5)
years or longer.
MONTHLY RATE: The sum of the following demand and energy charges:
Energy Charge:
Block 1 Retail Meter 4.1370 per kWh
Block 2 Generation Meter 3.6240 per kWh
Demand Charge as measured at the Retail Meter:
$19,000.00 for the first 3,000 kVA of demand or less.
1St Demand Block: $7.25 per kVA for each additional kVA of demand up to
55,000 kVA.
2nd Demand Block: $3.25 per kVA for each additional kVA of demand above
55,000 kVA.
Primary Voltage Discount as measured at the Retail Meter:
If Customer takes service at 11 kV(wye grounded)or higher, it will be allowed
a primary voltage discount of 400 per kVA of demand per month.
Minimum:
The demand charge unless a higher minimum is required under contract to
cover special conditions.
ANNUAL MINIMUM: $683,070
Any annual minimum deficiency will be determined during the April billing cycle for the
previous 12-month period. The annual minimum is based on 916,667 kWh's per month priced
at the Block 1 per kWh rate, plus twelve months multiplied by the monthly minimum demand
charge for the first 3,000 kVa of demand. The annual minimum reflected above is based on
base revenues only. Any other revenues paid in billed rates (such as the DSM Tariff Rider
Schedule 91) do not factor into the annual minimum calculation.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
�J By Patrick Ehrbar, Director of Regulatory Affairs
�T

Nineteenth Revision Sheet 31
Canceling
I.P.U.C. No.28 Eighteenth Revision Sheet 31
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 31
PUMPING SERVICE - IDAHO
(Available phase and voltage)
AVAILABLE:
To Customers in the State of Idaho where Company has electric service available.
APPLICABLE:
To service through one meter for pumping water or water effluents, including
incidental power used for other equipment and lighting essential to the pumping operation.
For such incidental service, Customer will furnish any transformers and other necessary
equipment. Customer may be required to enter into a written contract for five (5) years or
longer and will have service available on a continuous basis unless there is a change in
ownership or control of property served.
MONTHLY RATE:
The sum of the following charges:
$20.00 Basic Charge, plus
Energy Charge:
12.487¢ per kWh for the first 85 KWh per kW of demand, and for the next 80
KWh per kW of demand but not more than 3,000 KWh.
10.5460 per KWh for all additional KWh.
Annual Minimum:
$12.00 per kW of the highest demand established in the current year ending
with the November billing cycle. If no demand occurred in the current year, the
annual minimum will be based on the highest demand in the latest previous
year having a demand.
Demand:
The average kW supplied during the 15-minute period of maximum use during
the month determined, at the option of Company, by a demand meter or
nameplate input rating of pump motor.
SPECIAL TERMS AND CONDITIONS:
If Customer requests the account to be closed by reason of change in ownership or
control of property, the unbilled service and any applicable annual minimum will be
prorated to the date of closing.
Service under this schedule is subject to the Rules and Regulations contained in
this tariff.
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 58, Temporary Power Cost Adjustment Schedule 66, Fixed Cost
Adjustment Schedule 75, Tax Customer Credit Schedule 76 and Energy Efficiency Rider
Adjustment Schedule 91.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Eighteenth Revision Sheet 42
Canceling
I.P.U.C. No. 28 Seventeenth Revision Sheet 42
AVISTA CORPORATION
dba Avista Utilities
SCHEDULE 42
COMPANY OWNED STREET LIGHT SERVICE - IDAHO
(Single phase and available voltage)
AVAILABLE:
To agencies of local, state, or federal governments in all Idaho territory
served by Company.
APPLICABLE:
To annual operation of dusk-to-dawn lighting for public streets and
thoroughfares upon receipt of an authorized application. Closed to new
installations of sodium vapor lamps as of January 1, 2018, except where
Company and customer agree, sodium vapor lamps may be installed to provide
compatibility with existing light sources.
MONTHLY RATE:
Metal Standard Pole Facility
Developer
Fixture & Size Standard Pedestal Base Direct Burial Contributed
Code Rate Code Rate Code Rate Code Rate
Single High-Pressure Sodium Vapor
(Nominal Rating in Watts)
50W 235 $12.69 234# $15.84
100W 434# $16.64
100W 431/435 $15.43 432 $29.15 433 $29.15 436 $16.15
20OW 531/535 $25.58 532 $39.26 533 $39.26 536 $26.36
250W 631/635 $30.03 632 $43.71 633 $43.71 636 $30.80
40OW 831/835 $45.06 832 $58.77
Single High-Pressure Sodium Vapor
(Nominal Rating in Watts)
100W 446 $32.45
20OW 542 $66.50 546 $51.93
#Decorative Curb
Decorative Sodium Vapor
100W Granville 474* $30.11
100W Post Top 484* $28.90
10OW Kim Light 438** $16.66
*16'fiberglass pole
**25'fiberglass pole
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Fifteenth Revision Sheet 42A
Canceling
I.P.U.C. No. 28 Fourteenth Revision Sheet 42A
AVISTA CORPORATION
dba Avista Utilities
SCHEDULE 42A - Continued
MONTHLY RATE:
Metal Standard Pole Facility
Developer
Fixture & Size Standard Pedestal Base Direct Burial Contributed
Code Rate Code Rate Code Rate Code Rate
Single Light Emitting Diode (LED)
(Nominal Rating in Watts)
70W 935L $13.27 434L# $16.64
70W 431/435L $15.43 432L $29.15 433L $29.15 436L $16.15
107W 531/535L $25.58 532L $39.26 533L $39.26 536L $26.36
248W 831/835L $45.06 832L $58.77 833L $56.87 836L $44.33
Double Light Emitting Diode (LED)
(Nominal Rating in Watts)
70W 441 L $32.45 442L $46.25 446L $32.45
107W 545L $51.16 542L $66.50 546L $51.93
#Decorative Curb
Decorative LED
70W Granville 475L $22.11 474L* $30.11
70W Post Top 484L* $28.90
70W (30ft Fiberglass Pole) 494L $28.19
70W (35' Fiberglass Pole) 594L $31.07
*16' fiberglass pole
Custom Street Light Calculation
Customers who choose to add street light fixtures that are outside of the offerings listed above will
be quoted a fixed monthly rate based on the following rate calculation. The three components
detailed below will be added together to develop the new Schedule 42 rate.
Step 1 —The capital component will be determined by multiplying an engineering estimate of the
installed cost of the new light component, or fixture, by the Capital Recovery Factor of 10.988%.
Step 2—The maintenance component will either be the embedded maintenance cost of a similar
existing fixture or an engineering estimate of the maintenance cost of a new fixture. The
maintenance component for an existing light can be derived by subtracting the Schedule 46
(energy) light code monthly charge from the same Schedule 44 light code monthly charge
(maintenance and energy).
Step 3—The energy component will be the energy cost of the same wattage light under Schedule
46.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Eighteenth Revision Sheet 44
Canceling
I.P.U.C. No.28 Seventeenth Revision Sheet 44
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 44
CUSTOMER OWNED STREET LIGHT ENERGY AND MAINTENANCE SERVICE -
IDAHO
HIGH-PRESSURE SODIUM VAPOR
(Single phase and available voltage)
AVAILABLE:
To agencies of local, state, or federal governments in all Idaho territory served by
Company. Closed to new installations effective January 1, 2016.
APPLICABLE:
To annual operation of dusk-to-dawn lighting for public streets and thoroughfares
upon receipt of an authorized application.
MONTHLY RATE:
Pole Facility
Metal Standard
Fixture & Size Developer
(Lumens) No Pole Pedestal Base Direct Burial Contributed
Code Rate Code Rate Code Rate Code Rate
Single High-Pressure
Sodium Vapor
100W 435 $11.78 432 $11.78
20OW 535 $17.77 532 $17.77
250W 635 $19.97 632 $19.97 633 $19.97
40OW 835 $31.82 832 $31.83
150W 936 $15.46
SPECIAL TERMS AND CONDITIONS:
Customer is responsible for financing, installing and owning standards, luminaries
and necessary circuitry and related facilities to connect with Company designated points of
delivery. All such facilities will conform to Company's design, standards and
specifications. Customer is also responsible for painting (if desired) and replacing
damaged pole facilities.
Company will furnish the necessary energy, repairs and maintenance work
including lamp and glassware cleaning and replacement. Repairs and maintenance work
will be performed by Company during regularly scheduled working hours.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Eighteenth Revision Sheet 45
Canceling
I.P.U.C. No.28 Seventeenth Revision Sheet 45
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 45
CUSTOMER OWNED STREET LIGHT ENERGY SERVICE - IDAHO
(Single phase and available voltage)
AVAILABLE:
To agencies of local, state, or federal governments in all Idaho territory
served by Company. Closed to new installations as of November 24, 1981, except
where Company and customer agree, mercury vapor lamps may be installed to
provide compatibility with existing light sources.
APPLICABLE:
To annual operation of lighting for public streets and thoroughfares upon
receipt of an authorized application.
MONTHLY RATE:
Per Luminaire
Dusk to
Fixture Dawn
& Size Service
Lumens Code Rate
Mercury Vapor
10000 515 $8.65
20000# 615 15.71
#Also includes Metal Halide.
SPECIAL TERMS AND CONDITIONS:
Customer is responsible for financing, installing, owning, maintaining and
replacing all standards, luminaires, and necessary circuitry and related facilities to
connect with Company designated points of delivery. Customer will also provide a
light sensitive relay and/or time switch in order to control the hours that energy will
be provided.
Company is responsible only for the furnishing of energy to the point of
delivery and the billing and accounting related thereto.
Service under this schedule is subject to the Rules and Regulations
contained in this tariff.
The above Monthly Rates are subject to increases as set forth in Tax
Adjustment Schedule 58, Temporary Power Cost Adjustment Schedule 66, Tax
Customer Credit Schedule 76 and Energy Efficiency Rider Adjustment Schedule
91.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Eighteenth Revision Sheet 46
Canceling
I.P.U.C. No.28 Seventeenth Revision Sheet 46
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 46
CUSTOMER OWNED STREET LIGHT ENERGY SERVICE - IDAHO
HIGH-PRESSURE SODIUM VAPOR
(Single phase and available voltage)
AVAILABLE:
To agencies of local, state, or federal governments in all Idaho territory
served by Company.
APPLICABLE:
To annual operation of lighting for public streets and thoroughfares upon
receipt of an authorized application.
MONTHLY RATE:
Fixture Per Luminaire
& Size Dusk to Dawn Service
Lumens Code Rate
High-Pressure Sodium Vapor
(Nominal Rating in Watts)
100W 435 $ 5.36
20OW 535 10.02
250W 635 12.33
310W 735 14.65
40OW 835 18.70
150W 935 7.74
LED
01 — 10W 005L $ 0.23
11 —20W 015L 0.58
21 — 30W 025L 1.03
31 —40W 035L 1.49
41 — 50W 045L 1.90
51 —60W 055L 2.28
61 — 70W 065L 2.63
71 — 80W 075L 3.08
81 — 90W 085L 3.54
91 — 100W 095L 3.89
101 — 110W 105L 4.35
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Seventh Revision Sheet 46A
Canceling
I.P.U.C. No.28 Sixth Revision Sheet 46A
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 46A - Continued
MONTHLY RATE:
Fixture Per Luminaire
& Size Dusk to Dawn Service
Lumens Code Rate
111 - 120W 115L $ 4.68
121 - 130W 125L 5.14
131 - 140W 135L 5.59
141 - 150W 145L 5.94
151 - 160W 155L 6.39
161 - 170W 165L 6.74
171 - 180W 175L 7.20
181 - 190W 185L 7.66
191 - 20OW 195L 8.00
201 - 225W 212L 8.80
226 - 250W 237L 9.83
SPECIAL TERMS AND CONDITIONS:
Customer is responsible for financing, installing, owning, maintaining and
replacing all standards, luminaires, and necessary circuitry and related facilities to
connect with Company designated points of delivery. Customer will also provide a
light sensitive relay and/or time switch in order to control the hours that energy will be
provided.
Company is responsible only for the furnishing of energy to the point of
delivery and the billing and accounting related thereto.
Service under this schedule is subject to the Rules and Regulations
contained in this tariff.
The above Monthly Rates are subject to increases as set forth in Tax
Adjustment Schedule 58, Temporary Power Cost Adjustment Schedule 66, Tax
Customer Credit Schedule 76 and Energy Efficiency Rider Adjustment Schedule 91.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Eighteenth Revision Sheet 47
Canceling
I.P.U.C. No.28 Seventeenth Revision Sheet 47
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 47
AREA LIGHTING - MERCURY VAPOR - IDAHO
(Single phase and available voltage)
AVAILABLE:
In all Idaho territory served by Company where existing secondary
distribution facilities are of adequate capacity, phase, and voltage.
APPLICABLE:
To annual operation of dusk-to-dawn area lighting with mercury vapor lamps
upon receipt of a Customer contract for five (5) years or more. Mercury vapor
lamps will be available only to those customers receiving service on October 23,
1981.
MONTHLY RATE:
Charge per Unit
Nominal Lumens)
7,000 10,000 20,000
Luminaire (on existing standard) $ 18.00 $ 21.81 $ 30.95
Luminaire and Standard:
30-foot wood pole 22.53 26.36 35.50
Galvanized steel standards:
25 foot 42.60
Monthly Rate
per Pole
Pole Facility
30-foot wood pole $ 7.42
55-foot wood pole 14.37
20-foot fiberglass-direct burial 7.42
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Seventeenth Revision Sheet 49
Canceling
I.P.U.C. No.28 Sixteenth Revision Sheet 49
AVISTA CORPORATION
dba Avista Utilities
SCHEDULE 49
AREA LIGHTING - IDAHO
(Single phase and available voltage)
AVAILABLE:
In all territory served by the Company where existing secondary distribution facilities
are of adequate capacity, phase, and voltage.
APPLICABLE:
To annual operation of dusk-to-dawn area lighting with high-pressure sodium vapor
lamps upon receipt of a Customer contract for five (5)years or more.
MONTHLY RATE:
HIGH PRESSURE SODIUM VAPOR Charge per Unit
(Nominal Rating in Watts)
Luminaire 100W 20OW 250W 40OW
Cobrahead $14.37 $19.00 $21.96 $28.18
Decorative Curb $14.37
100W Post Top w/16-foot decorative pole $34.66
100W Kim Light w/25-foot fiberglass pole $21.79
40OW Flood (No pole) $34.43
LIGHT EMITTING DIODE (LED) Charge per Unit
(Nominal Rating in Watts)
Luminaire 70W 107W 125W 248W
Cobrahead $14.37 $19.00 $28.18
Decorative Curb $14.37
70W Granville w/16-foot decorative pole $38.01
70W Post Top w/16-foot decorative pole $34.66
70W 30ft fiberglass direct buried $28.19
107W 35ft fiberglass direct buried $32.78
125W Flood (No Pole) $17.48
125W Flood (40ft Pole) $29.68
248W Flood (No Pole) $34.43
Pole Facility Monthly Rate per Pole
30-foot wood pole $ 7.42
40-foot wood pole $ 12.18
55-foot wood pole $ 14.32
20-foot fiberglass $ 7.42
25-foot galvanized steel standard $ 11.58
30-foot galvanized steel standard* $ 12.79
25-foot galvanized aluminum standard* $ 14.13
30-foot fiberglass-pedestal base $ 35.40
30-foot steel-pedestal base $ 32.67
35 foot steel direct buried $ 32.67
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Twelfth Revision Sheet 49A
Canceling
I.P.U.C. No.28 Eleventh Revision Sheet 49A
AVISTA CORPORATION
dba Avista Utilities
SCHEDULE 49A — Continued
Custom Area Light Calculation
Customers who choose to add area light fixtures that are outside of the offerings listed
above will be quoted a fixed monthly rate based on the following rate calculation. The
three components detailed below will be added together to develop the new Schedule 49
rate.
Step 1 —The capital component will be determined by multiplying an engineering
estimate of the installed cost of the new area light component, or fixture, by the Capital
Recovery Factor of 10.988.
Step 2 —The maintenance component will be an engineering estimate of the
maintenance cost of a new fixture.
Step 3—The energy component will be the energy cost of the same wattage light under
Schedule 46.
SPECIAL TERMS AND CONDITIONS:
The Company will install, own, and maintain the facilities for supplying dusk-to-
dawn area lighting service using overhead circuits. At the request of Customer, Company
will install underground cable for such service provided Customer, in advance of
construction, pays Company the excess cost of such installation.
The Company will furnish the necessary energy, repairs, and maintenance work
including lamp and glassware replacement. Repairs and maintenance work will be
performed by Company during regularly scheduled working hours. Individual lamps will
be replaced on burnout as soon as reasonably possible after notification by Customer
and subject to Company's operating schedules and requirements.
The Company will assess the Customer the following removal charges if the
Customer requests to discontinue service under this schedule within the initial five-year
contract period:
$25 per luminaire $75 per pole
Service under this schedule is subject to the Rules and Regulations contained in
this tariff.
The above Monthly Rates are subject to increases as set forth in Tax Adjustment
Schedule 58, Temporary Power Cost Adjustment Schedule 66, Energy Efficiency Rider
Tax Customer Credit Schedule 76 and Adjustment Schedule 91.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Seventeenth Revision Sheet 41
Canceling
I.P.U.C. No.28 Sixteenth Revision Sheet 41
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 41
COMPANY OWNED STREET LIGHT SERVICE-IDAHO
(Single phase and available voltage)
AVAILABLE:
To agencies of local, state, or federal governments in all Idaho territory
served by Company. Closed to new installations as of November 24, 1981,
except where Company and customer agree, mercury vapor lamps may be
installed to provide compatibility with existing light sources.
APPLICABLE:
To annual operation of dusk-to-dawn lighting for public streets and
thoroughfares upon receipt of an authorized application.
MONTHLY RATE:
Pole Facility
Fixture Metal Standard
& Size Wood Pedestal Direct Developer
Lumens No Pole Pole Base Burial Contributed
Code Rate Code Rate Code Rate Code Rate Code Rate
Single Mercury Vapor
7000 411 $ 17.18 416 $ 17.18
*Not available to new customers accounts, or locations.
#Decorative Curb.
Issued June 28, 2024 Effective September 1, 2024
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Eighth Revision Sheet 41A
Canceling
I.P.U.C.No.28 Seventh Revision Sheet 41A
AVISTA CORPORATION
dba Avista Utilities
SCHEDULE 41A - continued
SPECIAL TERMS AND CONDITIONS:
Company will install, own, and maintain the facilities for supplying street
lighting service using facilities utilizing Company's design.
Company will furnish the necessary energy, repairs and maintenance work
including lamp and glassware replacement. Repairs and maintenance work will be
performed by Company during the regularly scheduled working hours.
Individual lamps will be replaced on burnout as soon as reasonably possible
after notification by Customer and subject to Company's operating schedules and
requirements.
Company will make any change in location at the request and expense of
Customer. Service may be terminated (abandoned) at any location on payment by
Customer of Company's average present investment less net salvage in the
facilities abandoned. Customer, at his option, may order a change of location of
the facilities and pay Company the cost of relocation rather than the cost of
termination.
Service under this schedule is subject to the Rules and Regulations
contained in this tariff.
The above Monthly Rates are subject to increases as set forth in Tax
Adjustment Schedule 58, Temporary Power Cost Adjustment Schedule 66, Tax
Customer Credit Schedule 76 and Energy Efficiency Rider Adjustment Schedule
91.
Issued September 1, 2021 Effective September 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

AVISTA UTILITIES
IDAHO ELECTRIC,CASE NO.AVU-E-25-01
PRESENT AND PROPOSED RATE COMPONENTS BY SCHEDULE
Effective September 1, 2025
General Proposed Proposed
Base Tariff Present Present Rate Billing Base Tariff
Sch.Rate OtherAdi.(1) Billing Rate Inc/Decr Rate Rate
(a) (b) (c) (d) (e) (f) (g)
Residential Service-Schedule 1
Basic Charge $20.00 $20.00 $0.00 $20.00 $20.00
Energy Charge:
First 600 kWhs $0.09152 ($0.00583) $0.08569 $0.00707 $0.09276 $0.09859
All over 600 kWhs $0.10286 ($0.00583) $0009703 $0.00796 $0.10498 $0.11081
General Services-Schedule 11
Basic Charge $20.00 $20.00 $0.00 $20.00 $20.00
Energy Charge:
First 3,650 kWhs $0.09211 ($0.00113) $0.09098 $0.00000 $0.09098 $0.09211
All over 3,650 kWhs $0.06458 ($0.00113) $0.06345 $0.01256 $0.07601 $0.07714
Demand Charge:
20 kW or less no charge no charge no charge no charge
Over 20 kW $7.00/kW $7.00/kW $1.00/kW $8.00/kW $8.00/kW
Large General Service-Schedule 21
Energy Charge:
First 250,000 kWhs $0.07170 ($0.00112) $0.07058 $0.00410 $0.07468 $0.07580
All over 250,000 kWhs $0.06042 ($0.00112) $0.05930 $0.00345 $0.06275 $0.06387
Demand Charge:
50 kW or less $525000 $525.00 $100.00 $625.00 $625.00
Over 50 kW $7.00/kW $7.00/kW $1.00/kW $8.00/kW $8.00/kW
Primary Voltage Discount $0.40/kW $0.40/kW $0.40/kW $0.40/kW
Direct Current Fast Charging Pilot-Schedule 23
Basic Charge $500.00 $500.00 $126.00 $625.00 $625.00
Energy Charge:
First 250,000 kWhs $0.08509 ($0.00112) $0.08397 $0.00487 $0.08884 $0.08996
All over 250,000 kWhs $0.07386 ($0.00112) $0.07274 $0.00422 $0.07696 $0.07808
Primary Voltage Discount $0.30/kW $0.30/kW $0.30/kW $0.30/kW
Extra Large General Service-Schedule 25
Energy Charge:
First 500,000 kWhs $0.05689 ($0.00162) $0.05527 $0.00241 $0.05768 $0.05930
All over 500,000 kWhs $0.04766 ($0.00162) $0.04604 $0.00202 $0.04806 $0.04968
Demand Charge:
3,000 kva or less $17,000 $17,000 $2,000 $19,000 $19,000
Over 3,000 kva $6.25/kva $6.25/kva $1.00/kva $7.25/kva $7.25/kva
Primary Volt.Discount $0.40/kW $0.40/kW $0.40/kW $0.40/kW
Annual Minimum Present: $783,640 $832,200
Clearwater-Schedule 25P
Energy Charge:
Block 1 Retail kWhs $0.04253 ($0.00179) $0.04074 ($0.00116) $0.03968 $0.04137
Demand Charge:
3,000 kva or less $17,000 $17,000 $2,000 $19,000 $19,000
3,000-55,000 kva $6.25/kva $6.25/kva $1.00/kva $7.25/kva $7.25/kva
Over 55,000 kva $3.00/kva $3.00/kva $0.25/kva $3.25/kva $3.25/kva
Primary Volt.Discount $0.40/kW $0.40/kW $0.40/kW $0.40/kW
Annual Minimum Present: $671,830 $683,070
Pumping Service-Schedule 31
Basic Charge $20.00 $20.00 $0.00 $20.00 $20.00
Energy Charge:
First 165 kW/kWhs $0.11522 ($0.00096) $0.11426 $0.00965 $0.12391 $0.12487
All additional kWhs $0.09731 ($0.00096) $0.09635 $0.00816 $0.10450 $0.10546
(1)Includes all present rate adjustments: Schedule 59-Residential&Farm Energy Rate Adjustment,Schedule 66-
Temporary Power Cost Adjustment,Schedule 75-Fixed Cost Adjustment,and Schedule 91 -Energy Efficiency
Rider Adjustment.
AVU-E-25-01/AVU-G-25-01 SETTLEMENT STIPULATION APPENDIX F Page 2 of 6

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AVISTA UTILITIES
Pro Forma Cost of Capital
Idaho-Electric System
Proposed:
Pro Forma
Capital Pro Forma Weighted
Component Structure Cost Cost
Total Debt 50.00% 4.950 o 2.48%
Common 50.000 o 9.600 o 4.80%
Total 100.00% 7.28%
Exhibit No. 4
Case Nos. AVU-E-25-01 and AVU-G-25-01
K. Schultz, Avista
Schedule 1, Page 1 of 1

AVISTA UTILITIES
Revenue Conversion Factor
Idaho-Electric System
TWELVE MONTHS ENDED JUNE 30,2024
Line
No. Description Factor
1 Revenues 1.000000
Expenses:
2 Uncollectibles 0.002212
3 Commission Fees 0.002127
4 Idaho Income Tax 0.000000
5 Total Expenses 0.004339
6 Net Operating Income Before FIT 0.995661
7 2 1% Federal Income Tax @ 2 1% 0209089
8 REVENUE CONVERSION FACTOR 0.786572
Exhibit No. 4
Case Nos. AVU-E-25-01 and AVU-G-25-01
K. Schultz, Avista
Schedule 1, Page 1 of 1

Eighteenth Revision Sheet 101
Canceling
I.P.U.C. No.27 Seventeenth Revision Sheet 101
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 101
GENERAL SERVICE - FIRM - IDAHO
AVAILABLE:
To Customers in the State of Idaho where Company has natural gas service
available.
APPLICABLE:
To firm gas service for any purpose when all such service used on the
premises is supplied at one point of delivery through a single meter.
MONTHLY RATE: Per Meter
Per Month
Basic charge $20.00
Charge Per Therm:
Base Rate 31.8400
Minimum Charge: $20.00
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 158, Purchase Gas Cost Adjustment Schedule 150, Gas
Rate Adjustment Schedule 155, Fixed Cost Adjustment Schedule 175, Tax
Customer Credit Schedule 176 and Energy Efficiency Rider Adjustment Schedule
191.
SPECIAL TERMS AND CONDITIONS:
Service under this schedule is subject to the Rules and Regulations
contained in this tariff.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar ,Director of Regulatory Affairs

Nineteenth Revision Sheet 111
Canceling
I.P.U.C. No.27 Eighteenth Revision Sheet 111
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 111
LARGE GENERAL SERVICE - FIRM - IDAHO
AVAILABLE:
To Customers in the State of Idaho where Company has natural gas service
available.
APPLICABLE:
To firm gas service for any purpose, subject to execution of a service
agreement for a term of one year or longer. All such service used on the premises
shall be supplied at one point of delivery through a single meter.
MONTHLY RATE:
Charge Per Therm:
Per Meter
Base Rate Per Month
First 200 $0.41840
Next 800 $0.31340
Next 9,000 $0.23982
All Over $0.17976
Minimum Charge: $83.68 The minimum charge calculation is based solely
on the base rate per therm noted above and is not inclusive of the adder schedules.
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 158, Purchase Gas Cost Adjustment Schedule 150, Gas
Rate Adjustment Schedule 155, Fixed Cost Adjustment Schedule 175, Tax
Customer Credit Schedule 176 and Energy Efficiency Rider Adjustment Schedule
191.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
( J By Patrick Ehrbar Director of Regulatory Affairs

Twentieth Revision Sheet 112
Canceling
I.P.U.C. No.27 Nineteenth Revision Sheet 112
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 112
LARGE GENERAL SERVICE - FIRM - IDAHO
AVAILABLE:
To Customers in the State of Idaho where Company has natural gas service
available. Customers taking service under this Schedule beginning on or after
March 1, 2002 must have been previously served under Schedule 146 —
Transportation Service for Customer—Owned Gas.
APPLICABLE:
To firm gas service for any purpose, subject to execution of a service
agreement for a term of one year or longer. All such service used on the premises
shall be supplied at one point of delivery through a single meter.
MONTHLY RATE:
Charge Per Therm:
Per Meter
Base Rate Per Month
First 200 $0.41840
Next 800 $0.31340
Next 9,000 $0.23982
All Over $0.17976
Minimum Charge: $83.68 The minimum charge calculation is based solely
on the base rate per therm noted above and is not inclusive of the adder schedules.
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 158, Purchase Gas Cost Adjustment Schedule 150, Gas
Rate Adjustment Schedule 155, Fixed Cost Adjustment Schedule 175, Tax
Customer Credit Schedule 176 and Energy Efficiency Rider Adjustment Schedule
191.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar Director of Regulatory Affairs

Sixteenth Revision Sheet 146
Canceling
I.P.U.C. No.27 Fifteenth Revision Sheet 146
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 146
TRANSPORTATION SERVICE FOR CUSTOMER-OWNED GAS - IDAHO
AVAILABLE:
To Commercial and Industrial Customers in the State of Idaho whose
requirements exceed 250,000 therms of gas per year provided that the Company's
existing distribution system has capacity adequate for the service requested by
Customer.
APPLICABLE:
To transportation service for a Customer-owned supply of natural gas from the
Company's point of interconnection with its Pipeline Transporter to the Company's
point of interconnection with the Customer. Service shall be supplied at one point of
delivery and metering for use by a single customer.
MONTHLY RATE:
$400.00 Customer Charge, plus
Charge Per Therm:
Base Rate 12.0710
ANNUAL MINIMUM:
$34,978 unless a higher minimum is required under contract to cover special
conditions.
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 158, Gas Rate Adjustment Schedule 155, Tax Customer Credit
Schedule 176 and Energy Efficiency Rider Adjustment Schedule 191.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Seventeenth Revision Sheet 101
Canceling
I.P.U.C. No.27 Sixteenth Revision Sheet 101
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 101
GENERAL SERVICE - FIRM - IDAHO
AVAILABLE:
To Customers in the State of Idaho where Company has natural gas service
available.
APPLICABLE:
To firm gas service for any purpose when all such service used on the
premises is supplied at one point of delivery through a single meter.
MONTHLY RATE: Per Meter
Per Month
Basic charge $20.00
Charge Per Therm:
Base Rate 0,
Minimum Charge: $20.00
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 158, Purchase Gas Cost Adjustment Schedule 150, Gas
Rate Adjustment Schedule 155, Fixed Cost Adjustment Schedule 175, Tax
Customer Credit Schedule 176 and Energy Efficiency Rider Adjustment Schedule
191.
SPECIAL TERMS AND CONDITIONS:
Service under this schedule is subject to the Rules and Regulations
contained in this tariff.
Issued June 28, 2024 Effective September 1, 2024
Issued by Avista Utilities
By Patrick Ehrbar Director of Regulatory Affairs

Eighteenth Revision Sheet 111
Canceling
I.P.U.C. No.27 Seventeenth Revision Sheet 111
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 111
LARGE GENERAL SERVICE - FIRM - IDAHO
AVAILABLE:
To Customers in the State of Idaho where Company has natural gas service
available.
APPLICABLE:
To firm gas service for any purpose, subject to execution of a service
agreement for a term of one year or longer. All such service used on the premises
shall be supplied at one point of delivery through a single meter.
MONTHLY RATE:
Charge Per Therm:
Per Meter
Base Rate Per Month
First 200 $0.35605
Next 800 $0.38451
Next 9,000 $n�4
All Over $0.18358
Minimum Charge: $71.21 The minimum charge calculation is based solely
on the base rate per therm noted above and is not inclusive of the adder schedules.
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 158, Purchase Gas Cost Adjustment Schedule 150, Gas
Rate Adjustment Schedule 155, Fixed Cost Adjustment Schedule 175, Tax
Customer Credit Schedule 176 and Energy Efficiency Rider Adjustment Schedule
191.
Issued June 28, 2024 Effective September 1, 2024
Issued by Avista Utilities
�J By Patrick Ehrbar Director of Regulatory Affairs
�T

Nineteenth Revision Sheet 112
Canceling
I.P.U.C. No.27 Eighteenth Revision Sheet 112
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 112
LARGE GENERAL SERVICE - FIRM - IDAHO
AVAILABLE:
To Customers in the State of Idaho where Company has natural gas service
available. Customers taking service under this Schedule beginning on or after
March 1, 2002 must have been previously served under Schedule 146 —
Transportation Service for Customer—Owned Gas.
APPLICABLE:
To firm gas service for any purpose, subject to execution of a service
agreement for a term of one year or longer. All such service used on the premises
shall be supplied at one point of delivery through a single meter.
MONTHLY RATE:
Charge Per Therm:
Per Meter
Base Rate Per Month
First 200 $8.35605
Next 800 $ 1
Next 9,000 $ 4
All Over $0.18358
Minimum Charge: $71.21 The minimum charge calculation is based solely
on the base rate per therm noted above and is not inclusive of the adder schedules.
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 158, Purchase Gas Cost Adjustment Schedule 150, Gas
Rate Adjustment Schedule 155, Fixed Cost Adjustment Schedule 175, Tax
Customer Credit Schedule 176 and Energy Efficiency Rider Adjustment Schedule
191.
Issued June 28, 2024 Effective September 1, 2024
Issued by Avista Utilities
( J By Patrick Ehrbar Director of Regulatory Affairs

Fifteenth Revision Sheet 146
Canceling
I.P.U.C. No.27 Fourteenth Revision Sheet 146
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 146
TRANSPORTATION SERVICE FOR CUSTOMER-OWNED GAS - IDAHO
AVAILABLE:
To Commercial and Industrial Customers in the State of Idaho whose
requirements exceed 250,000 therms of gas per year provided that the Company's
existing distribution system has capacity adequate for the service requested by
Customer.
APPLICABLE:
To transportation service for a Customer-owned supply of natural gas from the
Company's point of interconnection with its Pipeline Transporter to the Company's
point of interconnection with the Customer. Service shall be supplied at one point of
delivery and metering for use by a single customer.
MONTHLY RATE:
$300.00 Customer Charge, plus
Charge Per Therm:
Base Rate 12.2320,
ANNUAL MINIMUM:
$34,180 unless a higher minimum is required under contract to cover special
conditions.
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 158, Gas Rate Adjustment Schedule 155, Tax Customer Credit
Schedule 176 and Energy Efficiency Rider Adjustment Schedule 191.
Issued July 15, 2022 Effective September 1, 2022
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs
;C)c

Eighteenth Revision Sheet 101
Canceling
I.P.U.C. No.27 Seventeenth Revision Sheet 101
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 101
GENERAL SERVICE - FIRM - IDAHO
AVAILABLE:
To Customers in the State of Idaho where Company has natural gas service
available.
APPLICABLE:
To firm gas service for any purpose when all such service used on the
premises is supplied at one point of delivery through a single meter.
MONTHLY RATE: Per Meter
Per Month
Basic charge $20.00
Charge Per Therm:
Base Rate 31.8400
Minimum Charge: $20.00
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 158, Purchase Gas Cost Adjustment Schedule 150, Gas
Rate Adjustment Schedule 155, Fixed Cost Adjustment Schedule 175, Tax
Customer Credit Schedule 176 and Energy Efficiency Rider Adjustment Schedule
191.
SPECIAL TERMS AND CONDITIONS:
Service under this schedule is subject to the Rules and Regulations
contained in this tariff.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar ,Director of Regulatory Affairs

Nineteenth Revision Sheet 111
Canceling
I.P.U.C. No.27 Eighteenth Revision Sheet 111
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 111
LARGE GENERAL SERVICE - FIRM - IDAHO
AVAILABLE:
To Customers in the State of Idaho where Company has natural gas service
available.
APPLICABLE:
To firm gas service for any purpose, subject to execution of a service
agreement for a term of one year or longer. All such service used on the premises
shall be supplied at one point of delivery through a single meter.
MONTHLY RATE:
Charge Per Therm:
Per Meter
Base Rate Per Month
First 200 $0.41840
Next 800 $0.31340
Next 9,000 $0.23982
All Over $0.17976
Minimum Charge: $83.68 The minimum charge calculation is based solely
on the base rate per therm noted above and is not inclusive of the adder schedules.
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 158, Purchase Gas Cost Adjustment Schedule 150, Gas
Rate Adjustment Schedule 155, Fixed Cost Adjustment Schedule 175, Tax
Customer Credit Schedule 176 and Energy Efficiency Rider Adjustment Schedule
191.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
( J By Patrick Ehrbar Director of Regulatory Affairs

Twentieth Revision Sheet 112
Canceling
I.P.U.C. No.27 Nineteenth Revision Sheet 112
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 112
LARGE GENERAL SERVICE - FIRM - IDAHO
AVAILABLE:
To Customers in the State of Idaho where Company has natural gas service
available. Customers taking service under this Schedule beginning on or after
March 1, 2002 must have been previously served under Schedule 146 —
Transportation Service for Customer—Owned Gas.
APPLICABLE:
To firm gas service for any purpose, subject to execution of a service
agreement for a term of one year or longer. All such service used on the premises
shall be supplied at one point of delivery through a single meter.
MONTHLY RATE:
Charge Per Therm:
Per Meter
Base Rate Per Month
First 200 $0.41840
Next 800 $0.31340
Next 9,000 $0.23982
All Over $0.17976
Minimum Charge: $83.68 The minimum charge calculation is based solely
on the base rate per therm noted above and is not inclusive of the adder schedules.
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 158, Purchase Gas Cost Adjustment Schedule 150, Gas
Rate Adjustment Schedule 155, Fixed Cost Adjustment Schedule 175, Tax
Customer Credit Schedule 176 and Energy Efficiency Rider Adjustment Schedule
191.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
( J By Patrick Ehrbar Director of Regulatory Affairs

Sixteenth Revision Sheet 146
Canceling
I.P.U.C. No.27 Fifteenth Revision Sheet 146
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 146
TRANSPORTATION SERVICE FOR CUSTOMER-OWNED GAS - IDAHO
AVAILABLE:
To Commercial and Industrial Customers in the State of Idaho whose
requirements exceed 250,000 therms of gas per year provided that the Company's
existing distribution system has capacity adequate for the service requested by
Customer.
APPLICABLE:
To transportation service for a Customer-owned supply of natural gas from the
Company's point of interconnection with its Pipeline Transporter to the Company's
point of interconnection with the Customer. Service shall be supplied at one point of
delivery and metering for use by a single customer.
MONTHLY RATE:
400.00 Customer Charge, plus
Charge Per Therm:
Base Rate 12.071
ANNUAL MINIMUM:
34 978 unless a higher minimum is required under contract to cover special
conditions.
The above Monthly Rates are subject to increases or decreases as set forth in Tax
Adjustment Schedule 158, Gas Rate Adjustment Schedule 155, Tax Customer Credit
Schedule 176 and Energy Efficiency Rider Adjustment Schedule 191.
Issued August 29, 2025 Effective September 1, 2025
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Sixth Revision Sheet 146A
Canceling 146B
I.P.U.C. No.27 Fifth Sheet 146A
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 146 - continued
TRANSPORTATION SERVICE FOR CUSTOMER-OWNED GAS - IDAHO
TERMS AND CONDITIONS:
1. Service hereunder shall be provided subject to execution of a contract
between the Customer and the Company for a term of not less than one year. The
contract shall also specify the maximum daily volume of gas to be transported.
2. Service under this schedule shall be subject to the terms and conditions
described in the Company's Schedule 181, Natural Gas Transportation Service
Terms and Conditions, and Schedule 182, Plan for Natural Gas Service
Curtailment.
Issued October 24, 2019 Effective October 25, 2019
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

AVISTA UTILITIES
IDAHO GAS, CASE NO. AVU-G-25-01
PRESENT AND PROPOSED RATE COMPONENTS BY SCHEDULE
Effective September 1, 2025
Proposed
Present Base Present General Proposed Base
Distribution Billing Present Rate Billing Distribution
Type of Service Rate Rate Adl.(1) Billing Rate Inc/ Decr Rate Rate
(a) (b) (c) (d) (e) (f) (g)
General Service -Schedule 101
Basic Charge $20.00 $20.00 $0.00 $20.00 $20.00
Usage Charge:
All therms $0.25605 $0.35953 $0.61558 $0.06235 $0.67793 $0.31840
Large General Service -Schedule 111
Usage Charge:
First 200 therms $0.35605 $0.33932 $0.69537 $0.06235 $0.75772 $0.41840
200 - 1,000 therms $0.33451 $0.33932 $0.67383 ($0.02111) $0.65272 $0.31340
1,000 - 10,000 therms $0.24364 $0.33932 $0.58296 ($0.00382) $0.57914 $0.23982
All over 10,000 therms $0.18358 $0.33932 $0.52290 ($0.00382) $0.51908 $0.17976
Minimum Charge:
per month $71.21 $71.21 $12.47 $83.68 $83.68
per therm $0.00000 $0.33932 $0.33932 $0.33932 $0.00000
Interruptible Service -Schedule 131
Usage Charge:
All Therms $0.20379 $0.25665 $0.46044 $0.46044 $0.20379
Transportation Service -Schedule 146
Basic Charge $300.00 $300.00 $100.00 $400.00 $400.00
Usage Charge:
All Therms $0.12232 ($0.00365) $0.11867 ($0.00161) $0.11706 $0.12071
(1) Includes Schedule 150 - Purchased Gas Cost Adjustment, Schedule 155 - Gas Rate Adjustment, Schedule 175 -
Fixed Cost Adjustment and Schedule 191 - DSM, Schedule 176 -Tax Customer Credit
AVU-E-25-01 /AVU-G-25-01 SETTLEMENT STIPULATION APPENDIX F Page 5 of 6