20210907Final Approved Tariffs.pdf

September 1, 2021

Commission Secretary
Idaho Public Utilities Commission
472 W. Washington St.
Boise, ID 83702

RE: Tariff I.P.U.C. No. 28 (Electric) and Tariff I.P.U.C. No. 27 (Natural Gas)
Case Nos. AVU-E-21-01 and AVU-G-21-01

Compliance Tariff Filing
Commission Order No. 35156 - Case Nos. AVU-E-21-01 and AVU-G-21-01

Enclosed for electronic filing with the Commission are the compliance tariffs per the
Commission’s Order No. 35156 in Case Nos. AVU-E-21-01 and AVU-G-21-01.

Electric
Fifteenth Revision Sheet 001 canceling Fourteenth Revision Sheet 001
Fifteenth Revision Sheet 011 canceling Fourteenth Revision Sheet 011
Fifteenth Revision Sheet 021 canceling Fourteenth Revision Sheet 021
Fifteenth Revision Sheet 025 canceling Fourteenth Revision Sheet 025
Ninth Revision Sheet 025A canceling Eighth Revision Sheet 025A
Fifteenth Revision Sheet 025P canceling Fourteenth Revision Sheet 025P
Ninth Revision Sheet 025PA canceling Eighth Revision Sheet 025PA
Fifteenth Revision Sheet 031 canceling Fourteenth Revision Sheet 031
Fourteenth Revision Sheet 041 canceling Thirteenth Revision Sheet 041
Eighth Revision Sheet 041A canceling Seventh Revision Sheet 041A
Fourteenth Revision Sheet 042 canceling Thirteenth Revision Sheet 042
Eleventh Revision Sheet 042A canceling Tenth Revision Sheet 042A
Third Revision Sheet 042B canceling Second Revision Sheet 042B
Fourteenth Revision Sheet 044 canceling Thirteenth Revision Sheet 044
Eighth Revision Sheet 044A canceling Seventh Revision Sheet 044A
Fourteenth Revision Sheet 045 canceling Thirteenth Revision Sheet 045
Fourteenth Revision Sheet 046 canceling Thirteenth Revision Sheet 046
Third Revision Sheet 046A canceling Second Revision Sheet 046A
Fourteenth Revision Sheet 047 canceling Thirteenth Revision Sheet 047
Eighth Revision Sheet 047A canceling Seventh Revision Sheet 047A
Avista Corp.
1411 East Mission P.O. Box 3727
Spokane. Washington 99220-0500
Telephone [phone]
Toll Free 800-727-9170

Via Electronic Mail

RECEIVED
2021 September 1, PM 4:28
IDAHO PUBLIC
UTILITIES COMMISSION

Fourteenth Revision Sheet 049 canceling Thirteenth Revision Sheet 049
Ninth Revision Sheet 049A canceling Eighth Revision Sheet 049A
Original Sheet 76

Natural Gas
Fourteenth Revision Sheet 101 canceling Rep. Thirteenth Revision Sheet 101
Fifteenth Revision Sheet 111 canceling Rep. Fourteenth Revision Sheet 111
Sixteenth Revision Sheet 112 canceling Rep. Fifteenth Revision Sheet 112
Fifteenth Revision Sheet 131 canceling Rep. Fourteenth Revision Sheet 131
Seventeenth Revision Sheet 132 canceling Rep. Sixteenth Revision Sheet 132
Fourteenth Revision Sheet 146 canceling Rep. Thirteenth Revision Sheet 146
Original Sheet 176

Cancelled Tariff
First Revision Sheet 172

The tariff sheets also contain the Company’s proposal, as discussed in the Settlement Stipulation,
to cancel Permanent Federal Income Tax Schedule 172 as those benefits are incorporated into the
natural gas base tariffs.

These tariff sheets have an effective date of September 1, 2021, in compliance with the Order.
The compliance tariffs for Year 2 of the rate plan that will go into effect on September 1, 2022
will be filed prior to July 15, 2022.

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,

/s/ Patrick Ehrbar

Patrick Ehrbar
Director of Rates

Enclosures
BEFORE THE
IDAHO PUBLIC UTILITIES COMMISSION
AVISTA UTILITIES
AVU-E-21-01
__________________________________________
Tariff Sheets – Electric Clean

Fifteenth Revision Sheet 1
Canceling
I.P.U.C. No.28 Fourteenth Revision Sheet 1

AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 1, 2021 Effective September 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

SCHEDULE 1
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:
$6.00 Basic Charge, plus
First 600 kWh 8.930¢ per kWh
All over 600 kWh 10.036¢ per kWh

Monthly Minimum Charge: $6.00

OPTIONAL SEASONAL MONTHLY CHARGE:
A $6.00 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 $6.00 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.

IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary

Fifteenth Revision Sheet 11
Canceling
I.P.U.C. No.28 Fourteenth Revision Sheet 11

AVISTA CORPORATION
d/b/a vista Utilities
Issued September 1, 2021 Effective September 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

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:

$13.00 Basic Charge, plus
Energy Charge:
First 3650 kWh 9.357¢ per kWh
All Over 3650 kWh 6.558¢ per kWh

Demand Charge:
No charge for the first 20 kW of demand.
$6.00 per kW for each additional kW of demand.

Minimum:
$13.00 for single phase service and $20.10 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.

IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary

Fifteenth Revision Sheet 21
Canceling
I.P.U.C. No.28 Fourteenth Revision Sheet 21

AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 1, 2021 Effective September 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

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 6.328¢ per kWh
All Over 250,000 kWh 5.333¢ per kWh
Demand Charge:
$425.00 for the first 50 kW of demand or less.
$5.50 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 20¢ 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:
$425.00, 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.

IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary

Fifteenth Revision Sheet 25
Canceling
I.P.U.C. No.28 Fourteenth Revision Sheet 25

AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 1, 2021 Effective September 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

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 5.484¢ per kWh
All Over 500,000 kWh 4.594¢ per kWh
Demand Charge:
$14,000.00 for the first 3,000 kVA of demand or less.
$5.00 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 20¢ per kVA of demand per month.
Minimum:
The demand charge unless a higher minimum is required under contract
to cover special conditions.

ANNUAL MINIMUM: $726,740
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

IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary

Ninth Revision Sheet 25A
Canceling
I.P.U.C. No.28 Eighth Revision Sheet 25A

AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 1, 2021 Effective September 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

SCHEDULE 25A

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.

DEMAND:
The average kVA supplied during the 30-minute period of maximum use
during the current month as measured by Company's metering equipment.

SPECIAL TERMS AND CONDITIONS:
For Customers who have more than one metering point to serve contiguous
facilities or properties, the coincident demand from all such meters must not
exceed 25,000 kVA in order to receive service under this schedule. Customers
whose demand from all such meters exceeds 25,000 kVA may be served under
special contract wherein the rates, terms, and conditions of service are specified
and approved by the I.P.U.C. If the Company and the Customer cannot agree on
the rates, terms, and conditions of service, the matter will be brought before the
I.P.U.C. for resolution. If the Customer requires service during either the contract
negotiation or resolution period, service will be supplied under this rate schedule
subject to refund or surcharge based on the terms of the final contract.

For Customers whose power factor is less than 80%, their kVA demand will
be computed at an 80% power factor and the resulting kVA must be at least 2,500
in order to receive service under this schedule.

Customers utilizing resistance load banks solely for the purpose of
increasing their demand in order to qualify for service under this schedule will not
be served under this schedule.

Existing Customers who install demand-side management measures after
May 1, 1992, which cause their demand to fall below 2,500 kVA will continue to
qualify for service under this schedule. The Company will estimate the Customer's
demand reduction created by those demand-side management measures in order
to determine qualification for service under this schedule. If a Customer installs
demand-side management measures without assistance from the Company, it is
the Customer's responsibility to inform the Company regarding the installation of
such measures.

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,
Tax Customer Credit Schedule 76 and Energy Efficiency Rider Adjustment
Schedule 91.
IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary

Fifteenth Revision Sheet 25P
Canceling
I.P.U.C. No.28 Fourteenth Revision Sheet 25P

AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 1, 2021 Effective September 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

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 4.233¢ per kWh
Block 2 Generation Meter 2.456¢ per kWh

Demand Charge as measured at the Retail Meter:
$14,000.00 for the first 3,000 kVA of demand or less.
1st Demand Block: $5.00 per kVA for each additional kVA of demand up to
55,000 kVA.
2nd Demand Block: $2.50 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 20¢ per kVA of demand per month.

Minimum:
The demand charge unless a higher minimum is required under contract to
cover special conditions.

ANNUAL MINIMUM: $633,630
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.
IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary

Ninth Revision Sheet 25PA
Canceling
I.P.U.C. No. 28 Eighth Revision Sheet 25PA

AVISTA CORPORATION
dba Avista Utilities
Issued September 1, 2021 Effective September 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

SCHEDULE 25P (continued)

DEMAND:
The average kVA supplied during the 30-minute period of maximum use during the
current month as measured by Company's metering equipment.

The Demand rate for all kVA above 55,000 is directly related to the terms and
conditions of to the Service Agreement between Clearwater Paper and Avista, which is
effective on February 27, 2019 through December 31, 2023. Avista and Clearwater agree
that Clearwater’s load under Schedule 25P will increase during planned generation
outages, intermittent Clearwater generation outages, and other variations in Clearwater
Facility load. If, however, Clearwater sells any of its generation output to any third party,
thereby taking all or a larger portion of its retail load from Avista, the second demand block
described above would no longer be applicable, and all demand would be billed at the first
block rate, i.e., the rate per kVA charged for each kVA from 3001 kVA to 55,000 kVA.

SPECIAL TERMS AND CONDITIONS:
All Special Terms and Conditions are addressed in the Service Agreement between
Avista and Clearwater Paper Corporation as approved by the Commission effective
February 27, 2019.

The rates for Schedule 25P that are associated with all present and future tariff rider
schedules (such as the DSM Tariff Rider Schedule 91) are applied to the Block 1 Retail
Meter load only.

For purposes of all proposals related to General Rate Case Filings, Cost of Service
studies, Production and Transmission Ratio calculations, and Power Cost Adjustment rate
calculations etc., “Base Revenue” will be defined as Clearwater’s “net” generation
requirements as measured through the Block 1 Retail Meter.

If, at any time, the Agreement is terminated or suspended prior to its expiration,
Clearwater will generate into their own load and be billed at the Block 1 Retail Meter rate.

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, Tax Customer
Credit Schedule 76 and Energy Efficiency Rider Adjustment Schedule 91.

IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary

Fifteenth Revision Sheet 31
Canceling
I.P.U.C. No.28 Fourteenth Revision Sheet 31

AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 1, 2021 Effective September 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

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:
$11.00 Basic Charge, plus
Energy Charge:
10.126¢ 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.
8.551¢ 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.

IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary

Fourteenth Revision Sheet 41
Canceling
I.P.U.C. No.28 Thirteenth Revision Sheet 41

AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 1, 2021 Effective September 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

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 $ 16.16 416 $ 16.16

*Not available to new customers accounts, or locations.
#Decorative Curb.

IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary

Eighth Revision Sheet 41A
Canceling
I.P.U.C.No.28 Seventh Revision Sheet 41A

AVISTA CORPORATION
dba Avista Utilities
Issued September 1, 2021 Effective September 1, 2021

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

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.

IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary

Fourteenth Revision Sheet 42
Canceling
I.P.U.C. No.28 Thirteenth Revision Sheet 42

AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 1, 2021 Effective September 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

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
Fixture Pedestal Direct Developer
& Size Standard Base Burial Contributed
Code Rate Code Rate Code Rate Code Rate

Single High-Pressure Sodium Vapor
(Nominal Rating in Watts)
50W 235 $11.39 234# $14.21
100W 935 11.91 434# 14.93
100W 431/435 13.85 432 $26.16 433 26.16 436 $14.51
200W 531/535 22.96 532 35.23 533 35.23 536 23.65
250W 631/635 26.95 632 39.23 633 39.23 636 27.64
400W 831/835 40.45 832 52.75

Double High-Pressure Sodium Vapor
(Nominal Rating in Watts)
100W 446 $ 29.13
200W 545 $45.92 542 59.67 546 46.60

#Decorative Curb

Decorative Sodium Vapor
100W Granville 474* 27.02
100W Post Top 484* 25.93
100W Kim Light 438** 14.94

*16’ fiberglass pole
**25’ fiberglass pol
IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary

Eleventh Revision Sheet 42A
Canceling
I.P.U.C. No. 28 Tenth Revision Sheet 42A

AVISTA CORPORATION
dba Avista Utilities
Issued September 1, 2021 Effective September 1, 2021

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

SCHEDULE 42A - Continued

MONTHLY RATE:

Metal Standard Pole Facility
Fixture Pedestal Direct Developer
& Size Standard Base Burial Contributed
Code Rate Code Rate Code Rate Code Rate

Single Light Emitting Diode (LED)
(Nominal Rating in Watts)
70W 935L 11.91 434L# 14.93
70W 431/435L 13.85 432L 26.16 433L 26.16 436L 14.51
107W 531/535L 22.96 532L 35.23 533L 35.23 536L 23.65
248W 831/835L 40.45 832L 52.75 833L 52.75 836L 41.12
Double Light Emitting Diode (LED)
(Nominal Rating in Watts)
70W 441L 29.13 442L 41.52 446L 29.13
107W 545L 45.92 542L 59.67 546L 46.60
#Decorative Curb

Decorative LED
70W Granville 475L 20.78 474L* 27.02
70W Post Top 484L* 25.93
70W (30ft Fiberglass Pole) 494L 25.30
107W (35ft Fiberglass Pole) 594L 27.88
*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 11.590%.

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.

IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary

Third Revision Sheet 42B
Canceling
I.P.U.C. No. 28 Second Revision Sheet 42B

AVISTA CORPORATION
dba Avista Utilities
Issued September 1, 2021 Effective September 1, 2021

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

SCHEDULE 42B - 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 cleaning and 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.

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 Adjustment Rider Schedule
91.

IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary

Fourteenth Revision Sheet 44
Canceling
I.P.U.C. No.28 Thirteenth Revision Sheet 44

AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 1, 2021 Effective September 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

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
Fixture Metal Standard
& Size Pedestal Direct Developer
(Lumens) No Pole Base Burial Contributed
Code Rate Code Rate Code Rate Code Rate

Single High-Pressure Sodium Vapor
100W 435 $10.57 432 $10.57
200W 535 15.94 532 15.94
250W 635 17.92 632 17.92 633 17.92
400W 835 28.55 832 28.56
150W 936 13.87

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.

IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary

Eighth Revision Sheet 44A
Canceling
I.P.U.C. N0. 28 Seventh Revision Sheet 44A

AVISTA CORPORATION
dba Avista Utilities
Issued September 1, 2021 Effective September 1, 2021

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

SCHEDULE 44A - continued

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 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.

IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary

Fourteenth Revision Sheet 45
Canceling
I.P.U.C. No.28 Thirteenth Revision Sheet 45

AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 1, 2021 Effective September 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

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 $ 7.77
20000# 615 14.11
#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.

IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary

Fourteenth Revision Sheet 46
Canceling
I.P.U.C. No.28 Thirteenth Revision Sheet 46

AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 1, 2021 Effective September 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

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:
Per Luminaire
Dusk to
Fixture Dawn
& Size Service
(Lumens) Code Rate

High-Pressure Sodium Vapor
(Nominal Rating in Watts)
100W 435 $ 4.82
200W 535 9.00
250W 635 11.07
310W 735 13.16
400W 835 16.79
150W 935 6.95

LED

01 – 10W 005L $0.21
11 – 20W 015L 0.53
21 – 30W 025L 0.95
31 – 40W 035L 1.38
41 – 50W 045L 1.70
51 – 60W 055L 2.12
61 – 70W 065L 2.44
71 – 80W 075L 2.86
81 – 90W 085L 3.28
91 – 100W 095L 3.60
101 – 110W 105L 4.03

IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary

Third Revision Sheet 46A
Canceling
I.P.U.C. No.28 Second Revision Sheet 46A

AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 1, 2021 Effective September 1, 2021

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

SCHEDULE 46A - Continued

MONTHLY RATE:
Per Luminaire
Dusk to
Fixture Dawn
& Size Service
(Lumens) Code Rate

111 - 120W 115L $4.34
121 - 130W 125L 4.77
131 - 140W 135L 5.19
141 - 150W 145L 5.51
151 - 160W 155L 5.93
161 - 170W 165L 6.25
171 - 180W 175L 6.67
181 - 190W 185L 7.10
191 - 200W 195L 7.42
201 - 225W 212L 8.16
226 - 250W 237L 9.11

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.

IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary

Fourteenth Revision Sheet 47
Canceling
I.P.U.C. No.28 Thirteenth Revision Sheet 47

AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 1, 2021 Effective September 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

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) $ 16.16 $ 19.57 $ 27.79

Luminaire and Standard:

30-foot wood pole 20.22 23.65 31.87

Galvanized steel standards:
25 foot 38.23

Monthly Rate
per Pole
Pole Facility
30-foot wood pole $ 6.66
55-foot wood pole 12.89
20-foot fiberglass-direct burial 6.66

IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary

Eighth Revision Sheet 47A
Canceling
I.P.U.C. NO. 28 Seventh Revision Sheet 47A

AVISTA CORPORATION
dba Avista Utilities
Issued September 1, 2021 Effective September 1, 2021

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

SCHEDULE 47A - continued

SPECIAL TERMS AND CONDITIONS: - Continued

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 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.
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.

IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary

Fourteenth Revision Sheet 49
Canceling
I.P.U.C. No.28 Thirteenth Revision Sheet 49

AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 1, 2021 Effective September 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

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 $ 12.89 $ 17.05 $19.70 $ 25.29
Decorative Curb 12.89

100W Post Top w/16-foot decorative pole 31.11
100W Kim Light w/25-foot fiberglass pole 19.55
400W Flood (No pole) 30.90

LIGHT EMITTING DIODE (LED) Charge per Unit
(Nominal Rating in Watts)
Luminaire 70W 107W 125W 248W
Cobrahead $ 12.89 $ 17.05 $ 25.29
Decorative Curb 12.89

70W Granville w/16-foot decorative pole 32.46
70W Post Top w/16-foot decorative pole 31.11
70W 30ft fiberglass direct buried 25.30
107W 35ft fiberglass direct buried 27.88
125W Flood (No Pole) 15.69
125W Flood (40ft Pole) 26.63
248W Flood (No Pole) 30.90
Monthly Rate
Pole Facility per Pole
30-foot wood pole $ 6.66
40-foot wood pole 10.93
55-foot wood pole 12.85
20-foot fiberglass 6.66
25-foot galvanized steel standard 10.39
30-foot galvanized steel standard* 11.48
25-foot galvanized aluminum standard* 12.68
30-foot fiberglass-pedestal base 31.77
30-foot steel-pedestal base 29.32
35-foot steel-direct buried 29.32
IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary

Ninth Revision Sheet 49A
Canceling
I.P.U.C. No.28 Eighth Revision Sheet 49A

AVISTA CORPORATION
dba Avista Utilities
Issued September 1, 2021 Effective September 1, 2021

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

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 11.590%.

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.

IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary

I.P.U.C. No.27 Original Sheet 76

AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 1, 2021 Effective September 1, 2021

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

SCHEDULE 76

TAX CUSTOMER CREDIT - IDAHO

APPLICABLE:
To Customers in the State of Washington where the Company has electric service
available. This Tax Customer Credit shall be applicable to all retail customers for charges
for electric energy sold and to the flat rate charges for Company-owned or Customer-
owned Street Lighting and Area Lighting Service.

This rate credit is designed to reflect the benefits attributable to a change in accounting
for federal income tax expense from the normalization method to the flow-through method
for certain “non-protected” plant basis adjustments.

MONTHLY RATE:
The energy charges of the individual rate schedules are to be decreased by the
following amounts:

TERM:
The Tax Customer Credit will be in effect for the period from September 1, 2021
through August 31, 2022. Any residual balance at the end of the term will be
recovered in a future rate proceeding.

SPECIAL TERMS AND CONDITIONS:
Service under this schedule is subject to the Rules and Regulations contained in this
tariff.

The above Rate is subject to increases as set forth in Tax Adjustment Schedule 58.
Residential Service - Schedule 1 Extra Large General Service - Schedule 25
Energy Charge: Energy Charge:
First 600 kWhs 0.00396$ First 500,000 kWhs 0.00276$
All over 600 kWhs 0.00445$ All over 500,000 kWhs 0.00231$
General Services - Schedule 11 Clearwater - Schedule 25P
Energy Charge: Energy Charge:
First 3,650 kWhs 0.00448$ Block 1 Retail kWhs 0.00222$
All over 3,650 kWhs 0.00314$
Pumping Service - Schedule 31
Large General Service - Schedule 21 Energy Charge:
Energy Charge: First 165 kW/kWhs 0.00435$
First 250,000 kWhs 0.00337$ All additional kWhs 0.00367$
All over 250,000 kWhs 0.00284$
Street & Area Lights - Schedules 41-49
4.2% of Base Rates
IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Sept. 7, 2021 Sept. 1, 2021
Per O.N. 35156
Jan Noriyuki Secretary