20260630AVU-E-25-01 Electric Underline Tariffs.pdf

Twentieth Revision Sheet 1
Canceling
I.P.U.C. No.28 Nineteenth 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 10.3920 per kWh
All over 600 kWh 11.6800 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 30, 2026 Effective September 1, 2026
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs
��C'

Twentieth Revision Sheet 11
Canceling
I.P.U.C. No.28 Nineteenth 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 9.6830 per kWh
All Over 3650 kWh 8.1080 per kWh
Demand Charge:
No charge for the first 20 kW of demand.
$8.50 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 30, 2026 Effective September 1, 2026
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Twentieth Revision Sheet 21
Canceling
I.P.U.C. No.28 Nineteenth 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 7.9680 per kWh
All Over 250,000 kWh 6.7150 per kWh
Demand Charge:
$675.00 for the first 50 kW of demand or less.
$8.50 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:
$675.00, 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 30, 2026 Effective September 1, 2026
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Second Revision Sheet 23
Canceling
I.P.U.C. No.28 First Revision 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: $675.00
Energy Charge:
First 250,000 kWh 9.4560 per kWh
All Over 250,000 kWh 8.2090 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 June 30, 2026 Effective September 1, 2026
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Twentieth Revision Sheet 25
Canceling
I.P.U.C. No.28 Nineteenth 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 6.1650 per kWh
All Over 500,000 kWh 5.1650 per kWh
Demand Charge:
$20,000.00 for the first 3,000 kVA of demand or less.
$7.75 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: $868,150
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 30, 2026 Effective September 1, 2026
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Twenty First Revision Sheet 25P
Canceling
I.P.U.C. No.28 Twentieth 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 4.0930 per kWh
Block 2 Generation Meter 3.6240 per kWh
Demand Charge as measured at the Retail Meter:
$20,000.00 for the first 3,000 kVA of demand or less.
1St Demand Block: $7.75 per kVA for each additional kVA of demand up to
55,000 kVA.
2nd Demand Block: $3.50 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: $690,230
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 30, 2026 Effective September 1, 2026
Issued by Avista Utilities
�J By Patrick Ehrbar, Director of Regulatory Affairs
�T

Twentieth Revision Sheet 31
Canceling
I.P.U.C. No.28 Nineteenth 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:
13.2100 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.
11.1560 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 30, 2026 Effective September 1, 2026
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Nineteenth Revision Sheet 42
Canceling
I.P.U.C. No. 28 Eighteenth 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 $13.13 234# $16.38
100W 434# $17.21
100W 431/435 $15.96 432 $30.15 433 $30.15 436 $16.71
20OW 531/535 $26.46 532 $40.61 533 $40.61 536 $27.27
250W 631/635 $31.06 632 $45.21 633 $45.21 636 $31.86
40OW 831/835 $46.61 832 $60.79
Single High-Pressure Sodium Vapor
(Nominal Rating in Watts)
100W 446 $33.57
20OW 542 $68.79 546 $53.71
#Decorative Curb
Decorative Sodium Vapor
100W Granville 474* $31.14
100W Post Top 484* $29.89
10OW Kim Light 438** $17.23
*16'fiberglass pole
**25'fiberglass pole
Issued June 30, 2026 Effective September 1, 2026
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs
C� .

Sixteenth Revision Sheet 42A
Canceling
I.P.U.C. No. 28 Fifteenth 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 935E $13.73 434L# $17.21
70W 431/435L $15.96 432E $30.15 433E $30.15 436E $16.71
107W 531/535L $26.46 532E $40.61 533E $40.61 536E $27.27
248W 831/835L $46.61 832E $60.79 833E $58.82 836E $45.85
Double Light Emitting Diode (LED)
(Nominal Rating in Watts)
70W 441 L $33.57 442E $47.84 446E $33.57
107W 545E $52.92 542E $68.79 546E $53.71
#Decorative Curb
Decorative LED
70W Granville 475E $23.18 474L* $31.14
70W Post Top 484L* $29.89
70W (30ft Fiberglass Pole) 494E $29.16
70W (35' Fiberglass Pole) 594E $32.14
*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 June 30, 2026 Effective September 1, 2026
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs
C� .

Nineteenth Revision Sheet 44
Canceling
I.P.U.C. No.28 Eighteenth 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 $12.18 432 $12.18
20OW 535 $18.38 532 $18.38
250W 635 $20.66 632 $20.66 633 $20.66
40OW 835 32.91 832 $32.92
150W 936 $15.99
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 30, 2026 Effective September 1, 2026
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs
C� .

Nineteenth Revision Sheet 45
Canceling
I.P.U.C. No.28 Eighteenth 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 $8.95
20000# 615 16.25
#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 30, 2026 Effective September 1, 2026
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Nineteenth Revision Sheet 46
Canceling
I.P.U.C. No.28 Eighteenth 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 $ 5.54
20OW 535 10.36
250W 635 12.75
310W 735 15.15
40OW 835 19.34
150W 935 8.01
LED
01 — 10W 005L $ 0.24
11 —20W 015L 0.60
21 — 30W 025L 1.07
31 —40W 035L 1.54
41 — 50W 045L 1.97
51 —60W 055L 2.36
61 — 70W 065L 2.72
71 — 80W 075L 3.19
81 — 90W 085L 3.66
91 — 100W 095L 4.02
101 — 110W 105L 4.50
Issued June 30, 2026 Effective September 1, 2026
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Eighth Revision Sheet 46A
Canceling
I.P.U.C. No.28 Seventh 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 $ 4.84
121 - 130W 125L 5.32
131 - 140W 135L 5.78
141 - 150W 145L 6.14
151 - 160W 155L 6.61
161 - 170W 165L 6.97
171 - 180W 175L 7.45
181 - 190W 185L 7.92
191 - 20OW 195L 8.27
201 - 225W 212L 9.10
226 - 250W 237L 10.17
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 30, 2026 Effective September 1, 2026
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

Nineteenth Revision Sheet 47
Canceling
I.P.U.C. No.28 Eighteenth 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) $ 18.62 $ 22.56 $ 32.01
Luminaire and Standard:
30-foot wood pole 23.30 27.27 36.72
Galvanized steel standards:
25 foot 44.06
Monthly Rate
per Pole
Pole Facility
30-foot wood pole $ 7.68
55-foot wood pole 14.86
20-foot fiberglass-direct burial 7.68
Issued June 30, 2026 Effective September 1, 2026
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs
C� .

Eighteenth Revision Sheet 49
Canceling
I.P.U.C. No.28 Seventeenth 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 $14.86 $19.65 $22.71 $29.15
Decorative Curb $14.86
100W Post Top w/16-foot decorative pole $35.85
100W Kim Light w/25-foot fiberglass pole $22.54
40OW Flood (No pole) $35.61
LIGHT EMITTING DIODE (LED) Charge per Unit
(Nominal Rating in Watts)
Luminaire 70W 107W 125W 248W
Cobrahead $14.86 $19.65 $29.15
Decorative Curb $14.86
70W Granville w/16-foot decorative pole $39.32
70W Post Top w/16-foot decorative pole $35.85
70W 30ft fiberglass direct buried $29.16
107W 35ft fiberglass direct buried $33.91
125W Flood (No Pole) $18.08
125W Flood (40ft Pole) $30.70
248W Flood (No Pole) $35.61
Pole Facility Monthly Rate per Pole
30-foot wood pole $ 7.68
40-foot wood pole $ 12.60
55-foot wood pole $ 14.81
20-foot fiberglass $ 7.68
25-foot galvanized steel standard $ 11.98
30-foot galvanized steel standard* $ 13.23
25-foot galvanized aluminum standard* $ 14.62
30-foot fiberglass-pedestal base $ 36.62
30-foot steel-pedestal base $ 33.79
35 foot steel direct buried L13.79
Issued June 30, 2026 Effective September 1, 2026
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs
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