20210129Miller Exhibit 18 Schedules 1-6.pdf

DAVID J. MEYER
VICE PRESIDENT AND CHIEF COUNSEL FOR
REGULATORY & GOVERNMENTAL AFFAIRS
AVISTA CORPORATION
P.O. BOX 3727
1411 EAST MISSION AVENUE
SPOKANE, WASHINGTON 99220-3727
TELEPHONE: [phone]
FACSIMILE: [phone]
[e-mail]

BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION

IN THE MATTER OF THE APPLICATION ) CASE NO. AVU-E-21-01
OF AVISTA CORPORATION FOR THE ) CASE NO. AVU-G-21-01
AUTHORITY TO INCREASE ITS RATES )
AND CHARGES FOR ELECTRIC AND ) EXHIBIT NO. 18
NATURAL GAS SERVICE TO ELECTRIC ) OF
AND NATURAL GAS CUSTOMERS IN THE ) JOSEPH D. MILLER
STATE OF IDAHO )
)

FOR AVISTA CORPORATION

(ELECTRIC AND NATURAL GAS)

DAVID J. MEYER VICE PRESIDENT AND CHIEF COUNSEL FOR
REGULATORY & GOVERNMENTAL AFFAIRS
AVISTA CORPORATION P.O. BOX 3727 1411 EAST MISSION AVENUE SPOKANE, WASHINGTON 99220-3727
TELEPHONE: [phone] FACSIMILE: [phone] [e-mail]

BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION

IN THE MATTER OF THE APPLICATION ) CASE NO. AVU-E-21-01 OF AVISTA CORPORATION FOR THE ) CASE NO. AVU-G-21-01
AUTHORITY TO INCREASE ITS RATES ) AND CHARGES FOR ELECTRIC AND ) NATURAL GAS SERVICE TO ELECTRIC ) EXHIBIT NO. 18 AND NATURAL GAS CUSTOMERS IN THE )
STATE OF IDAHO ) JOSEPH D. MILLER

FOR AVISTA CORPORATION

(ELECTRIC AND NATURAL GAS)
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 1 of 76
Fourteenth Revision Sheet 1
Canceling
I.P.U.C. No.28 Thirteenth Revision Sheet 1
AVISTA CORPORATION
d/b/a Avista Utilities
Issued November 26, 2019 Effective December 1, 2019
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 8.482¢ per kWh
All over 600 kWh 9.533¢ 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, Energy Efficiency Rider Adjustment Schedule 91 and Earnings Test Deferral
Rebate Schedule 97.
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 2 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 9.406¢ per kWh
All over 600 kWh 10.572¢ 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, and Energy Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 3 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued November 26, 2019 Effective December 1, 2019
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 8.909¢ per kWh
All Over 3650 kWh 6.244¢ 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, Energy Efficiency Rider Adjustment
Schedule 91 and Earnings Test Deferral Rebate Schedule 97.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 4 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 9.957¢ per kWh
All Over 3650 kWh 6.979¢ 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, and Energy Efficiency Rider
Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 5 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued November 26, 2019 Effective December 1, 2019
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 5.991¢ per kWh
All Over 250,000 kWh 5.049¢ 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, Energy Efficiency Rider Adjustment Schedule 91 and Earnings Test
Deferral Rebate Schedule 97.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 6 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 6.780¢ per kWh
All Over 250,000 kWh 5.714¢ 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, and Energy Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 7 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued November 26, 2019 Effective December 1, 2019
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 5.208¢ per kWh
All Over 500,000 kWh 4.363¢ 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: $698,630
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

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 8 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 5.853¢ per kWh
All Over 500,000 kWh 4.903¢ 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: $764,330
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

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 9 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued November 26, 2019 Effective December 1, 2019
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,
Energy Efficiency Rider Adjustment Schedule 91 and Earnings Test Deferral
Rebate Schedule 97.
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 10 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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,
and Energy Efficiency Rider Adjustment Schedule.
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 11 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued November 26, 2019 Effective December 1, 2019
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 4.177¢ 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: $627,470
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.
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 12 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 4.697¢ 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: $684,670
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.
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 13 of 76

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

AVISTA CORPORATION
dba Avista Utilities
Issued November 26, 2019 Effective December 1, 2019
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, Energy
Efficiency Rider Adjustment Schedule 91 and Earnings Test Deferral Rebate Schedule 97.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 14 of 76

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

AVISTA CORPORATION
dba Avista Utilities
Issued January 29, 2021 Effective March 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, and Energy
Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 15 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued November 26, 2019 Effective December 1, 2019
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:
9.691¢ 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.
8.184¢ 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, Energy Efficiency Rider Adjustment Schedule 91 and Earnings
Test Deferral Rebate Schedule 97.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 16 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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:
10.709¢ 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.
9.043¢ 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, and Energy Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 17 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued November 26, 2019 Effective December 1, 2019
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 $ 15.49 416 $ 15.49

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

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 18 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 $ 17.06 416 $ 17.06

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

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 19 of 76

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

AVISTA CORPORATION
dba Avista Utilities
Issued November 26, 2019 Effective December 1, 2019
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,
Energy Efficiency Rider Adjustment Schedule 91 and Earnings Test Deferral
Rebate Schedule 97.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 20 of 76

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

AVISTA CORPORATION
dba Avista Utilities
Issued January 29, 2021 Effective March 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, and
Energy Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 21 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued November 26, 2019 Effective December 1, 2019
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 $10.92 234# $13.62
100W 935 11.42 434# 14.31
100W 431/435 13.27 432 $25.07 433 25.07 436 $13.91
200W 531/535 22.01 532 33.77 533 33.77 536 22.67
250W 631/635 25.83 632 37.60 633 37.60 636 26.49
400W 831/835 38.77 832 50.56

Double High-Pressure Sodium Vapor
(Nominal Rating in Watts)
100W 446 $ 27.92
200W 545 $44.01 542 57.19 546 44.66

#Decorative Curb

Decorative Sodium Vapor
100W Granville 474* 25.90
100W Post Top 484* 24.85
100W Kim Light 438** 14.32

*16’ fiberglass pole
**25’ fiberglass pol
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 22 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 $12.03 234# $15.00
100W 935 12.58 434# 15.76
100W 431/435 14.61 432 $27.61 433 27.61 436 $15.32
200W 531/535 24.24 532 37.19 533 37.19 536 24.96
250W 631/635 28.44 632 41.41 633 41.41 636 29.17
400W 831/835 42.69 832 55.68

Double High-Pressure Sodium Vapor
(Nominal Rating in Watts)
100W 446 $ 30.75
200W 545 $48.46 542 62.98 546 49.18

#Decorative Curb

Decorative Sodium Vapor
100W Granville 474* 28.52
100W Post Top 484* 27.36
100W Kim Light 438** 15.77

*16’ fiberglass pole
**25’ fiberglass pol
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 23 of 76

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

AVISTA CORPORATION
dba Avista Utilities
Issued November 26, 2019 Effective December 1, 2019
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 11.42 434L# 14.31
70W 431/435L 13.27 432L 25.07 433L 25.07 436L 13.91
107W 531/535L 22.01 532L 33.77 533L 33.77 536L 22.67
248W 831/835L 38.77 832L 50.56 833L 50.56 836L 39.41
Double Light Emitting Diode (LED)
(Nominal Rating in Watts)
70W 441L 27.92 442L 39.80 446L 27.92
107W 545L 44.01 542L 57.19 546L 44.66
#Decorative Curb

Decorative LED
70W Granville 475L 19.92 474L* 25.90
70W Post Top 484L* 24.85
70W (30ft Fiberglass Pole) 494L 24.25
107W (35ft Fiberglass Pole) 594L 26.72
*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 11.736%.

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.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 24 of 76

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

AVISTA CORPORATION
dba Avista Utilities
Issued January 29, 2021 Effective March 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 12.58 434L# 15.76
70W 431/435L 14.61 432L 27.61 433L 27.61 436L 15.32
107W 531/535L 24.24 532L 37.19 533L 37.19 536L 24.96
248W 831/835L 42.69 832L 55.68 833L 55.68 836L 43.40
Double Light Emitting Diode (LED)
(Nominal Rating in Watts)
70W 441L 30.75 442L 43.83 446L 30.75
107W 545L 48.46 542L 62.98 546L 49.18
#Decorative Curb

Decorative LED
70W Granville 475L 21.94 474L* 28.52
70W Post Top 484L* 27.36
70W (30ft Fiberglass Pole) 494L 26.70
107W (35ft Fiberglass Pole) 594L 29.42
*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 11.846%.

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.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 25 of 76

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

AVISTA CORPORATION
dba Avista Utilities
Issued November 26, 2019 Effective December 1, 2019
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,
Energy Efficiency Adjustment Rider Schedule 91 and Earnings Test Deferral
Rebate Schedule 97.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 26 of 76

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

AVISTA CORPORATION
dba Avista Utilities
Issued January 29, 2021 Effective March 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, and
Energy Efficiency Adjustment Rider Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 27 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued November 26, 2019 Effective December 1, 2019
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 $10.13 432 $10.13
200W 535 15.28 532 15.28
250W 635 17.18 632 17.18 633 17.18
400W 835 27.37 832 27.37
150W 936 13.29

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.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 28 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 $11.16 432 $11.16
200W 535 16.83 532 16.83
250W 635 18.92 632 18.92 633 18.92
400W 835 30.13 832 30.14
150W 936 14.63

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.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 29 of 76

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

AVISTA CORPORATION
dba Avista Utilities
Issued November 26, 2019 Effective December 1, 2019
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,
Energy Efficiency Rider Adjustment Schedule 91 and Earnings Test Deferral
Rebate Schedule 97.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 30 of 76

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

AVISTA CORPORATION
dba Avista Utilities
Issued January 29, 2021 Effective March 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, and
Energy Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 31 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued November 26, 2019 Effective December 1, 2019
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 $ 7.45
20000# 615 13.52
#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,
Energy Efficiency Rider Adjustment Schedule 91 and Earnings Test Deferral
Rebate Schedule 97.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 32 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 $ 8.20
20000# 615 14.89
#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, and
Energy Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 33 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued November 26, 2019 Effective December 1, 2019
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 $ 4.62
200W 535 8.63
250W 635 10.61
310W 735 12.61
400W 835 16.09
150W 935 6.66

LED

01 – 10W 005L $0.20
11 – 20W 015L 0.51
21 – 30W 025L 0.91
31 – 40W 035L 1.32
41 – 50W 045L 1.62
51 – 60W 055L 2.03
61 – 70W 065L 2.34
71 – 80W 075L 2.74
81 – 90W 085L 3.15
91 – 100W 095L 3.45
101 – 110W 105L 3.86

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 34 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 $ 5.09
200W 535 9.50
250W 635 11.68
310W 735 13.89
400W 835 17.72
150W 935 7.33

LED

01 – 10W 005L $0.22
11 – 20W 015L 0.56
21 – 30W 025L 1.01
31 – 40W 035L 1.45
41 – 50W 045L 1.79
51 – 60W 055L 2.24
61 – 70W 065L 2.57
71 – 80W 075L 3.02
81 – 90W 085L 3.47
91 – 100W 095L 3.80
101 – 110W 105L 4.25

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 35 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued November 26, 2019 Effective December 1, 2019
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 $4.16
121 - 130W 125L 4.57
131 - 140W 135L 4.98
141 - 150W 145L 5.28
151 - 160W 155L 5.69
161 - 170W 165L 5.99
171 - 180W 175L 6.40
181 - 190W 185L 6.80
191 - 200W 195L 7.11
201 - 225W 212L 7.82
226 - 250W 237L 8.73

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, Energy
Efficiency Rider Adjustment Schedule 91 and Earnings Test Deferral Rebate
Schedule 97.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 36 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 $4.58
121 - 130W 125L 5.03
131 - 140W 135L 5.48
141 - 150W 145L 5.81
151 - 160W 155L 6.26
161 - 170W 165L 6.60
171 - 180W 175L 7.04
181 - 190W 185L 7.49
191 - 200W 195L 7.83
201 - 225W 212L 8.61
226 - 250W 237L 9.62

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, Energy
and Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 37 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued November 26, 2019 Effective December 1, 2019
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) $ 15.49 $ 18.76 $ 26.64

Luminaire and Standard:

30-foot wood pole 19.38 22.67 30.55

Galvanized steel standards:
25 foot 36.64

Monthly Rate
per Pole
Pole Facility
30-foot wood pole $ 6.38
55-foot wood pole 12.35
20-foot fiberglass-direct burial 6.38

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 38 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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) $ 17.06 $ 20.66 $ 29.34

Luminaire and Standard:

30-foot wood pole 21.34 24.96 33.64

Galvanized steel standards:
25 foot 40.35

Monthly Rate
per Pole
Pole Facility
30-foot wood pole $ 7.03
55-foot wood pole 13.60
20-foot fiberglass-direct burial 7.03

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 39 of 76

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

AVISTA CORPORATION
dba Avista Utilities
Issued November 26, 2019 Effective December 1, 2019
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,
Energy Efficiency Rider Adjustment Schedule 91 and Earnings Test Deferral
Rebate Schedule 97.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 40 of 76

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

AVISTA CORPORATION
dba Avista Utilities
Issued January 29, 2021 Effective March 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, and
Energy Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 41 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued November 26, 2019 Effective December 1, 2019
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 $ 12.35 $ 16.34 $18.88 $ 24.24
Decorative Curb 12.35

100W Post Top w/16-foot decorative pole 29.82
100W Kim Light w/25-foot fiberglass pole 18.74
400W Flood (No pole) 29.62

LIGHT EMITTING DIODE (LED) Charge per Unit
(Nominal Rating in Watts)
Luminaire 70W 107W 125W 248W
Cobrahead $ 12.35 $ 16.34 $ 24.24
Decorative Curb 12.35

70W Granville w/16-foot decorative pole 31.11
70W Post Top w/16-foot decorative pole 29.82
70W 30ft fiberglass direct buried 24.25
107W 35ft fiberglass direct buried 26.72
125W Flood (No Pole) 15.04
125W Flood (40ft Pole) 25.52
248W Flood (No Pole) 29.62
Monthly Rate
Pole Facility per Pole
30-foot wood pole $ 6.38
40-foot wood pole 10.48
55-foot wood pole 12.32
20-foot fiberglass 6.38
25-foot galvanized steel standard 9.96
30-foot galvanized steel standard* 11.00
25-foot galvanized aluminum standard* 12.15
30-foot fiberglass-pedestal base 30.45
30-foot steel-pedestal base 28.10
35-foot steel-direct buried 28.10
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 42 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 $ 13.60 $ 17.99 $20.79 $ 26.69
Decorative Curb 13.60

100W Post Top w/16-foot decorative pole 32.84
100W Kim Light w/25-foot fiberglass pole 20.64
400W Flood (No pole) 32.62

LIGHT EMITTING DIODE (LED) Charge per Unit
(Nominal Rating in Watts)
Luminaire 70W 107W 125W 248W
Cobrahead $ 13.60 $ 17.99 $ 26.69
Decorative Curb 13.60

70W Granville w/16-foot decorative pole 34.26
70W Post Top w/16-foot decorative pole 32.84
70W 30ft fiberglass direct buried 26.70
107W 35ft fiberglass direct buried 29.42
125W Flood (No Pole) 16.56
125W Flood (40ft Pole) 28.10
248W Flood (No Pole) 32.62
Monthly Rate
Pole Facility per Pole
30-foot wood pole $ 7.03
40-foot wood pole 11.54
55-foot wood pole 13.57
20-foot fiberglass 7.03
25-foot galvanized steel standard 10.97
30-foot galvanized steel standard* 12.11
25-foot galvanized aluminum standard* 13.38
30-foot fiberglass-pedestal base 33.53
30-foot steel-pedestal base 30.94
35-foot steel-direct buried 30.94
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 43 of 76

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

AVISTA CORPORATION
dba Avista Utilities
Issued November 26, 2019 Effective December 1, 2019
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 11.736%.

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
Adjustment Schedule 91 and Earnings Test Deferral Rebate Schedule 97.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 44 of 76

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

AVISTA CORPORATION
dba Avista Utilities
Issued January 29, 2021 Effective March 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 11.846%.

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
and Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 45 of 76
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 46 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 9.406¢ per kWh
All over 600 kWh 10.572¢ 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, and Energy Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 47 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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:
$8.00 Basic Charge, plus
First 600 kWh 9.554¢ per kWh
All over 600 kWh 10.738¢ per kWh

Monthly Minimum Charge: $8.00

OPTIONAL SEASONAL MONTHLY CHARGE:
A $8.00 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 $8.00 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, and Energy Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 48 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 9.957¢ per kWh
All Over 3650 kWh 6.979¢ 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, and Energy Efficiency Rider
Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 49 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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:

$15.00 Basic Charge, plus
Energy Charge:
First 3650 kWh 10.138¢ per kWh
All Over 3650 kWh 7.106¢ per kWh

Demand Charge:
No charge for the first 20 kW of demand.
$6.50 per kW for each additional kW of demand.

Minimum:
$15.00 for single phase service and $22.10 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, and Energy Efficiency Rider
Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 50 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 6.780¢ per kWh
All Over 250,000 kWh 5.714¢ 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, and Energy Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 51 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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 6.819¢ per kWh
All Over 250,000 kWh 5.747¢ per kWh
Demand Charge:
$500.00 for the first 50 kW of demand or less.
$6.00 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 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:
$500.00, 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, and Energy Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 52 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 5.853¢ per kWh
All Over 500,000 kWh 4.903¢ 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: $764,330
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

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 53 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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 5.910¢ per kWh
All Over 500,000 kWh 4.951¢ per kWh
Demand Charge:
$16,500.00 for the first 3,000 kVA of demand or less.
$5.50 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: $800,150
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

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 54 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 4.697¢ 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: $684,670
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.
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 55 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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 4.680¢ per kWh
Block 2 Generation Meter 2.456¢ per kWh

Demand Charge as measured at the Retail Meter:
$16,500.00 for the first 3,000 kVA of demand or less.
1st Demand Block: $5.50 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: $712,800
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.
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 56 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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:
10.709¢ 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.
9.043¢ 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, and Energy Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 57 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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:
$13.00 Basic Charge, plus
Energy Charge:
11.004¢ 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.
9.292¢ 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, and Energy Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 58 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 $ 17.06 416 $ 17.06

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

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 59 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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 $ 17.61 416 $ 17.61

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

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 60 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 $12.03 234# $15.00
100W 935 12.58 434# 15.76
100W 431/435 14.61 432 $27.61 433 27.61 436 $15.32
200W 531/535 24.24 532 37.19 533 37.19 536 24.96
250W 631/635 28.44 632 41.41 633 41.41 636 29.17
400W 831/835 42.69 832 55.68

Double High-Pressure Sodium Vapor
(Nominal Rating in Watts)
100W 446 $ 30.75
200W 545 $48.46 542 62.98 546 49.18

#Decorative Curb

Decorative Sodium Vapor
100W Granville 474* 28.52
100W Post Top 484* 27.36
100W Kim Light 438** 15.77

*16’ fiberglass pole
**25’ fiberglass pol
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 61 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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 $12.42 234# $15.49
100W 935 12.99 434# 16.27
100W 431/435 15.08 432 $28.51 433 28.51 436 $15.82
200W 531/535 25.03 532 38.40 533 38.40 536 25.77
250W 631/635 29.36 632 42.76 633 42.76 636 30.12
400W 831/835 44.08 832 57.49

Double High-Pressure Sodium Vapor
(Nominal Rating in Watts)
100W 446 $ 31.75
200W 545 $50.04 542 65.03 546 50.78

#Decorative Curb

Decorative Sodium Vapor
100W Granville 474* 29.45
100W Post Top 484* 28.25
100W Kim Light 438** 16.28

*16’ fiberglass pole
**25’ fiberglass pol
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 62 of 76

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

AVISTA CORPORATION
dba Avista Utilities
Issued January 29, 2021 Effective March 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 12.58 434L# 15.76
70W 431/435L 14.61 432L 27.61 433L 27.61 436L 15.32
107W 531/535L 24.24 532L 37.19 533L 37.19 536L 24.96
248W 831/835L 42.69 832L 55.68 833L 55.68 836L 43.40
Double Light Emitting Diode (LED)
(Nominal Rating in Watts)
70W 441L 30.75 442L 43.83 446L 30.75
107W 545L 48.46 542L 62.98 546L 49.18
#Decorative Curb

Decorative LED
70W Granville 475L 21.94 474L* 28.52
70W Post Top 484L* 27.36
70W (30ft Fiberglass Pole) 494L 26.70
107W (35ft Fiberglass Pole) 594L 29.42
*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 11.846%.

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.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 63 of 76

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

AVISTA CORPORATION
dba Avista Utilities
Issued January 29, 2021 Effective September 1, 2022

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 12.99 434L# 16.27
70W 431/435L 15.08 432L 28.51 433L 28.51 436L 15.82
107W 531/535L 25.03 532L 38.40 533L 38.40 536L 25.77
248W 831/835L 44.08 832L 57.49 833L 57.49 836L 44.81
Double Light Emitting Diode (LED)
(Nominal Rating in Watts)
70W 441L 31.75 442L 45.25 446L 31.75
107W 545L 50.04 542L 65.03 546L 50.78
#Decorative Curb

Decorative LED
70W Granville 475L 22.65 474L* 29.45
70W Post Top 484L* 28.25
70W (30ft Fiberglass Pole) 494L 27.57
107W (35ft Fiberglass Pole) 594L 30.38
*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 11.846%.

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.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 64 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 $11.16 432 $11.16
200W 535 16.83 532 16.83
250W 635 18.92 632 18.92 633 18.92
400W 835 30.13 832 30.14
150W 936 14.63

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.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 65 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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 $11.52 432 $11.52
200W 535 17.38 532 17.38
250W 635 19.54 632 19.54 633 19.54
400W 835 31.11 832 31.12
150W 936 15.11

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.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 66 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 $ 8.20
20000# 615 14.89
#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, and
Energy Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 67 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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 $ 8.47
20000# 615 15.37
#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, and
Energy Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 68 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 $ 5.09
200W 535 9.50
250W 635 11.68
310W 735 13.89
400W 835 17.72
150W 935 7.33

LED

01 – 10W 005L $0.22
11 – 20W 015L 0.56
21 – 30W 025L 1.01
31 – 40W 035L 1.45
41 – 50W 045L 1.79
51 – 60W 055L 2.24
61 – 70W 065L 2.57
71 – 80W 075L 3.02
81 – 90W 085L 3.47
91 – 100W 095L 3.80
101 – 110W 105L 4.25

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 69 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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 $ 5.26
200W 535 9.81
250W 635 12.06
310W 735 14.34
400W 835 18.30
150W 935 7.57

LED

01 – 10W 005L $0.23
11 – 20W 015L 0.58
21 – 30W 025L 1.04
31 – 40W 035L 1.50
41 – 50W 045L 1.85
51 – 60W 055L 2.31
61 – 70W 065L 2.65
71 – 80W 075L 3.12
81 – 90W 085L 3.58
91 – 100W 095L 3.92
101 – 110W 105L 4.39

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 70 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 $4.58
121 - 130W 125L 5.03
131 - 140W 135L 5.48
141 - 150W 145L 5.81
151 - 160W 155L 6.26
161 - 170W 165L 6.60
171 - 180W 175L 7.04
181 - 190W 185L 7.49
191 - 200W 195L 7.83
201 - 225W 212L 8.61
226 - 250W 237L 9.62

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, Energy
and Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 71 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022

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 $4.73
121 - 130W 125L 5.19
131 - 140W 135L 5.66
141 - 150W 145L 6.00
151 - 160W 155L 6.46
161 - 170W 165L 6.81
171 - 180W 175L 7.27
181 - 190W 185L 7.73
191 - 200W 195L 8.08
201 - 225W 212L 8.89
226 - 250W 237L 9.93

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, Energy
and Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 72 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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) $ 17.06 $ 20.66 $ 29.34

Luminaire and Standard:

30-foot wood pole 21.34 24.96 33.64

Galvanized steel standards:
25 foot 40.35

Monthly Rate
per Pole
Pole Facility
30-foot wood pole $ 7.03
55-foot wood pole 13.60
20-foot fiberglass-direct burial 7.03

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 73 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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) $ 17.61 $ 21.33 $ 30.29

Luminaire and Standard:

30-foot wood pole 22.03 25.77 34.73

Galvanized steel standards:
25 foot 41.66

Monthly Rate
per Pole
Pole Facility
30-foot wood pole $ 7.26
55-foot wood pole 14.04
20-foot fiberglass-direct burial 7.26

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 74 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 $ 13.60 $ 17.99 $20.79 $ 26.69
Decorative Curb 13.60

100W Post Top w/16-foot decorative pole 32.84
100W Kim Light w/25-foot fiberglass pole 20.64
400W Flood (No pole) 32.62

LIGHT EMITTING DIODE (LED) Charge per Unit
(Nominal Rating in Watts)
Luminaire 70W 107W 125W 248W
Cobrahead $ 13.60 $ 17.99 $ 26.69
Decorative Curb 13.60

70W Granville w/16-foot decorative pole 34.26
70W Post Top w/16-foot decorative pole 32.84
70W 30ft fiberglass direct buried 26.70
107W 35ft fiberglass direct buried 29.42
125W Flood (No Pole) 16.56
125W Flood (40ft Pole) 28.10
248W Flood (No Pole) 32.62
Monthly Rate
Pole Facility per Pole
30-foot wood pole $ 7.03
40-foot wood pole 11.54
55-foot wood pole 13.57
20-foot fiberglass 7.03
25-foot galvanized steel standard 10.97
30-foot galvanized steel standard* 12.11
25-foot galvanized aluminum standard* 13.38
30-foot fiberglass-pedestal base 33.53
30-foot steel-pedestal base 30.94
35-foot steel-direct buried 30.94
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 75 of 76

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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 $ 14.04 $ 18.57 $21.47 $ 27.56
Decorative Curb 14.04

100W Post Top w/16-foot decorative pole 33.91
100W Kim Light w/25-foot fiberglass pole 21.31
400W Flood (No pole) 33.68

LIGHT EMITTING DIODE (LED) Charge per Unit
(Nominal Rating in Watts)
Luminaire 70W 107W 125W 248W
Cobrahead $ 14.04 $ 18.57 $ 27.56
Decorative Curb 14.04

70W Granville w/16-foot decorative pole 35.37
70W Post Top w/16-foot decorative pole 33.91
70W 30ft fiberglass direct buried 27.57
107W 35ft fiberglass direct buried 30.38
125W Flood (No Pole) 17.10
125W Flood (40ft Pole) 29.01
248W Flood (No Pole) 33.68
Monthly Rate
Pole Facility per Pole
30-foot wood pole $ 7.26
40-foot wood pole 11.92
55-foot wood pole 14.01
20-foot fiberglass 7.26
25-foot galvanized steel standard 11.33
30-foot galvanized steel standard* 12.50
25-foot galvanized aluminum standard* 13.81
30-foot fiberglass-pedestal base 34.62
30-foot steel-pedestal base 31.95
35-foot steel-direct buried 31.95
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 1, Page 76 of 76
DAVID J. MEYER VICE PRESIDENT AND CHIEF COUNSEL FOR
REGULATORY & GOVERNMENTAL AFFAIRS
AVISTA CORPORATION P.O. BOX 3727 1411 EAST MISSION AVENUE SPOKANE, WASHINGTON 99220-3727
TELEPHONE: [phone] FACSIMILE: [phone] [e-mail]
BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF THE APPLICATION ) CASE NO. AVU-E-21-01 OF AVISTA CORPORATION FOR THE ) CASE NO. AVU-G-21-01
AUTHORITY TO INCREASE ITS RATES ) AND CHARGES FOR ELECTRIC AND ) NATURAL GAS SERVICE TO ELECTRIC ) EXHIBIT NO. 18 AND NATURAL GAS CUSTOMERS IN THE )
STATE OF IDAHO ) JOSEPH D. MILLER
FOR AVISTA CORPORATION
(ELECTRIC AND NATURAL GAS)
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 1 of 40

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 9.406¢ per kWh
All over 600 kWh 10.572¢ 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, and Energy Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 2 of 40

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 9.957¢ per kWh
All Over 3650 kWh 6.979¢ 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, and Energy Efficiency Rider
Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 3 of 40

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 6.780¢ per kWh
All Over 250,000 kWh 5.714¢ 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, and Energy Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 4 of 40

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 5.853¢ per kWh
All Over 500,000 kWh 4.903¢ 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: $764,330
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

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 5 of 40

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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,
and Energy Efficiency Rider Adjustment Schedule.
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 6 of 40

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 4.697¢ 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: $684,670
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.
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 7 of 40

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

AVISTA CORPORATION
dba Avista Utilities
Issued January 29, 2021 Effective March 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, and Energy
Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 8 of 40

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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:
10.709¢ 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.
9.043¢ 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, and Energy Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 9 of 40

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 $ 17.06 416 $ 17.06

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

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 10 of 40

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

AVISTA CORPORATION
dba Avista Utilities
Issued January 29, 2021 Effective March 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, and
Energy Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 11 of 40

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 $12.03 234# $15.00
100W 935 12.58 434# 15.76
100W 431/435 14.61 432 $27.61 433 27.61 436 $15.32
200W 531/535 24.24 532 37.19 533 37.19 536 24.96
250W 631/635 28.44 632 41.41 633 41.41 636 29.17
400W 831/835 42.69 832 55.68

Double High-Pressure Sodium Vapor
(Nominal Rating in Watts)
100W 446 $ 30.75
200W 545 $48.46 542 62.98 546 49.18

#Decorative Curb

Decorative Sodium Vapor
100W Granville 474* 28.52
100W Post Top 484* 27.36
100W Kim Light 438** 15.77

*16’ fiberglass pole
**25’ fiberglass pol
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 12 of 40

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

AVISTA CORPORATION
dba Avista Utilities
Issued January 29, 2021 Effective March 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 12.58 434L# 15.76
70W 431/435L 14.61 432L 27.61 433L 27.61 436L 15.32
107W 531/535L 24.24 532L 37.19 533L 37.19 536L 24.96
248W 831/835L 42.69 832L 55.68 833L 55.68 836L 43.40
Double Light Emitting Diode (LED)
(Nominal Rating in Watts)
70W 441L 30.75 442L 43.83 446L 30.75
107W 545L 48.46 542L 62.98 546L 49.18
#Decorative Curb

Decorative LED
70W Granville 475L 21.94 474L* 28.52
70W Post Top 484L* 27.36
70W (30ft Fiberglass Pole) 494L 26.70
107W (35ft Fiberglass Pole) 594L 29.42
*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 11.846%.

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.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 13 of 40

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

AVISTA CORPORATION
dba Avista Utilities
Issued January 29, 2021 Effective March 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, and
Energy Efficiency Adjustment Rider Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 14 of 40

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 $11.16 432 $11.16
200W 535 16.83 532 16.83
250W 635 18.92 632 18.92 633 18.92
400W 835 30.13 832 30.14
150W 936 14.63

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.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 15 of 40

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

AVISTA CORPORATION
dba Avista Utilities
Issued January 29, 2021 Effective March 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, and
Energy Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 16 of 40

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 $ 8.20
20000# 615 14.89
#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, and
Energy Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 17 of 40

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 $ 5.09
200W 535 9.50
250W 635 11.68
310W 735 13.89
400W 835 17.72
150W 935 7.33

LED

01 – 10W 005L $0.22
11 – 20W 015L 0.56
21 – 30W 025L 1.01
31 – 40W 035L 1.45
41 – 50W 045L 1.79
51 – 60W 055L 2.24
61 – 70W 065L 2.57
71 – 80W 075L 3.02
81 – 90W 085L 3.47
91 – 100W 095L 3.80
101 – 110W 105L 4.25

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 18 of 40

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 $4.58
121 - 130W 125L 5.03
131 - 140W 135L 5.48
141 - 150W 145L 5.81
151 - 160W 155L 6.26
161 - 170W 165L 6.60
171 - 180W 175L 7.04
181 - 190W 185L 7.49
191 - 200W 195L 7.83
201 - 225W 212L 8.61
226 - 250W 237L 9.62

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, Energy
and Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 19 of 40

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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) $ 17.06 $ 20.66 $ 29.34

Luminaire and Standard:

30-foot wood pole 21.34 24.96 33.64

Galvanized steel standards:
25 foot 40.35

Monthly Rate
per Pole
Pole Facility
30-foot wood pole $ 7.03
55-foot wood pole 13.60
20-foot fiberglass-direct burial 7.03

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 20 of 40

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

AVISTA CORPORATION
dba Avista Utilities
Issued January 29, 2021 Effective March 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, and
Energy Efficiency Rider Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 21 of 40

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

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 $ 13.60 $ 17.99 $20.79 $ 26.69
Decorative Curb 13.60

100W Post Top w/16-foot decorative pole 32.84
100W Kim Light w/25-foot fiberglass pole 20.64
400W Flood (No pole) 32.62

LIGHT EMITTING DIODE (LED) Charge per Unit
(Nominal Rating in Watts)
Luminaire 70W 107W 125W 248W
Cobrahead $ 13.60 $ 17.99 $ 26.69
Decorative Curb 13.60

70W Granville w/16-foot decorative pole 34.26
70W Post Top w/16-foot decorative pole 32.84
70W 30ft fiberglass direct buried 26.70
107W 35ft fiberglass direct buried 29.42
125W Flood (No Pole) 16.56
125W Flood (40ft Pole) 28.10
248W Flood (No Pole) 32.62
Monthly Rate
Pole Facility per Pole
30-foot wood pole $ 7.03
40-foot wood pole 11.54
55-foot wood pole 13.57
20-foot fiberglass 7.03
25-foot galvanized steel standard 10.97
30-foot galvanized steel standard* 12.11
25-foot galvanized aluminum standard* 13.38
30-foot fiberglass-pedestal base 33.53
30-foot steel-pedestal base 30.94
35-foot steel-direct buried 30.94
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 22 of 40

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

AVISTA CORPORATION
dba Avista Utilities
Issued January 29, 2021 Effective March 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 11.846%.

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
and Adjustment Schedule 91.

Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 23 of 40
I.P.U.C. No.27 Original Sheet 76
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 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 November 30, 2022. Any residual balance at the end of this 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 0.00924$ First 500,000 kWhs 0.00645$
All over 600 kWhs 0.01039$ All over 500,000 kWhs 0.00540$
General Services - Schedule 11 Clearwater - Schedule 25P
Energy Charge:Energy Charge:
First 3,650 kWhs 0.01048$ Block 1 Retail kWhs 0.00520$
All over 3,650 kWhs 0.00735$
Pumping Service - Schedule 31
Large General Service - Schedule 21 Energy Charge:
Energy Charge: First 165 kW/kWhs 0.01018$
First 250,000 kWhs 0.00789$ All additional kWhs 0.00859$
All over 250,000 kWhs 0.00665$
Street & Area Lights - Schedules 41-49
10.1% of Base Rates
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 24 of 40
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 25 of 40
Sixteenth Revision Sheet 1
Canceling
I.P.U.C. No.28 Fifteenth Revision Sheet 1
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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:
$8.00 Basic Charge, plus
First 600 kWh 9.554¢ per kWh
All over 600 kWh 10.738¢ per kWh
Monthly Minimum Charge: $8.00
OPTIONAL SEASONAL MONTHLY CHARGE:
A $8.00 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 $8.00 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, and Energy Efficiency Rider Adjustment Schedule 91.
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 26 of 40
Sixteenth Revision Sheet 11
Canceling
I.P.U.C. No.28 Fifteenth Revision Sheet 11
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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:
$15.00 Basic Charge, plus
Energy Charge:
First 3650 kWh 10.138¢ per kWh
All Over 3650 kWh 7.106¢ per kWh
Demand Charge:
No charge for the first 20 kW of demand.
$6.50 per kW for each additional kW of demand.
Minimum:
$15.00 for single phase service and $22.10 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, and Energy Efficiency Rider
Adjustment Schedule 91.
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 27 of 40
Sixteenth Revision Sheet 21
Canceling
I.P.U.C. No.28 Fifteenth Revision Sheet 21
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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 6.819¢ per kWh
All Over 250,000 kWh 5.747¢ per kWh
Demand Charge:
$500.00 for the first 50 kW of demand or less.
$6.00 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 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:
$500.00, 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, and Energy Efficiency Rider Adjustment Schedule 91.
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 28 of 40
Sixteenth Revision Sheet 25
Canceling
I.P.U.C. No.28 Fifteenth Revision Sheet 25
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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 5.910¢ per kWh
All Over 500,000 kWh 4.951¢ per kWh
Demand Charge:
$16,500.00 for the first 3,000 kVA of demand or less.
$5.50 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: $800,150
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
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 29 of 40
Sixteenth Revision Sheet 25P
Canceling
I.P.U.C. No.28 Fifteenth Revision Sheet 25P
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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 4.680¢ per kWh
Block 2 Generation Meter 2.456¢ per kWh
Demand Charge as measured at the Retail Meter:
$16,500.00 for the first 3,000 kVA of demand or less.
1st Demand Block: $5.50 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: $712,800
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.
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 30 of 40
Sixteenth Revision Sheet 31 Canceling

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: $13.00 Basic Charge, plus Energy Charge: 11.004¢ 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. 9.292¢ 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, and Energy Efficiency Rider Adjustment Schedule 91.
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 31 of 40
Fifteenth Revision Sheet 41
Canceling
I.P.U.C. No.28 Fourteenth Revision Sheet 41
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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 $ 17.61 416 $ 17.61
*Not available to new customers accounts, or locations.
#Decorative Curb.
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 32 of 40
Fifteenth Revision Sheet 42
Canceling
I.P.U.C. No.28 Fourteenth Revision Sheet 42
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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 $12.42 234# $15.49
100W 935 12.99 434# 16.27
100W 431/435 15.08 432 $28.51 433 28.51 436 $15.82
200W 531/535 25.03 532 38.40 533 38.40 536 25.77
250W 631/635 29.36 632 42.76 633 42.76 636 30.12
400W 831/835 44.08 832 57.49
Double High-Pressure Sodium Vapor
(Nominal Rating in Watts)
100W 446 $ 31.75
200W 545 $50.04 542 65.03 546 50.78
#Decorative Curb
Decorative Sodium Vapor
100W Granville 474* 29.45
100W Post Top 484* 28.25
100W Kim Light 438** 16.28
*16’ fiberglass pole
**25’ fiberglass pol
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 33 of 40
Twelfth Revision Sheet 42A
Canceling
I.P.U.C. No. 28 Eleventh Revision Sheet 42A
AVISTA CORPORATION
dba Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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 12.99 434L# 16.27
70W 431/435L 15.08 432L 28.51 433L 28.51 436L 15.82
107W 531/535L 25.03 532L 38.40 533L 38.40 536L 25.77
248W 831/835L 44.08 832L 57.49 833L 57.49 836L 44.81
Double Light Emitting Diode (LED)
(Nominal Rating in Watts)
70W 441L 31.75 442L 45.25 446L 31.75
107W 545L 50.04 542L 65.03 546L 50.78
#Decorative Curb
Decorative LED
70W Granville 475L 22.65 474L* 29.45
70W Post Top 484L* 28.25
70W (30ft Fiberglass Pole) 494L 27.57
107W (35ft Fiberglass Pole) 594L 30.38
*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 11.846%.
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.
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 34 of 40
Fifteenth Revision Sheet 44
Canceling
I.P.U.C. No.28 Fourteenth Revision Sheet 44
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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 $11.52 432 $11.52
200W 535 17.38 532 17.38
250W 635 19.54 632 19.54 633 19.54
400W 835 31.11 832 31.12
150W 936 15.11
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.
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 35 of 40
Fifteenth Revision Sheet 45
Canceling
I.P.U.C. No.28 Fourteenth Revision Sheet 45
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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 $ 8.47
20000# 615 15.37
#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, and
Energy Efficiency Rider Adjustment Schedule 91.
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 36 of 40
Fifteenth Revision Sheet 46
Canceling
I.P.U.C. No.28 Fourteenth Revision Sheet 46
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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 $ 5.26
200W 535 9.81
250W 635 12.06
310W 735 14.34
400W 835 18.30
150W 935 7.57
LED
01 – 10W 005L $0.23
11 – 20W 015L 0.58
21 – 30W 025L 1.04
31 – 40W 035L 1.50
41 – 50W 045L 1.85
51 – 60W 055L 2.31
61 – 70W 065L 2.65
71 – 80W 075L 3.12
81 – 90W 085L 3.58
91 – 100W 095L 3.92
101 – 110W 105L 4.39
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 37 of 40
Fourth Revision Sheet 46A
Canceling
I.P.U.C. No.28 Third Revision Sheet 46A
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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 $4.73
121 - 130W 125L 5.19
131 - 140W 135L 5.66
141 - 150W 145L 6.00
151 - 160W 155L 6.46
161 - 170W 165L 6.81
171 - 180W 175L 7.27
181 - 190W 185L 7.73
191 - 200W 195L 8.08
201 - 225W 212L 8.89
226 - 250W 237L 9.93
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, Energy
and Efficiency Rider Adjustment Schedule 91.
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 38 of 40
Fifteenth Revision Sheet 47
Canceling
I.P.U.C. No.28 Fourteenth Revision Sheet 47
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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) $ 17.61 $ 21.33 $ 30.29
Luminaire and Standard:
30-foot wood pole 22.03 25.77 34.73
Galvanized steel standards:
25 foot 41.66
Monthly Rate
per Pole
Pole Facility
30-foot wood pole $ 7.26
55-foot wood pole 14.04
20-foot fiberglass-direct burial 7.26
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 39 of 40
Fifteenth Revision Sheet 49
Canceling
I.P.U.C. No.28 Fourteenth Revision Sheet 49
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
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 $ 14.04 $ 18.57 $21.47 $ 27.56
Decorative Curb 14.04
100W Post Top w/16-foot decorative pole 33.91
100W Kim Light w/25-foot fiberglass pole 21.31
400W Flood (No pole) 33.68
LIGHT EMITTING DIODE (LED) Charge per Unit
(Nominal Rating in Watts)
Luminaire 70W 107W 125W 248W
Cobrahead $ 14.04 $ 18.57 $ 27.56
Decorative Curb 14.04
70W Granville w/16-foot decorative pole 35.37
70W Post Top w/16-foot decorative pole 33.91
70W 30ft fiberglass direct buried 27.57
107W 35ft fiberglass direct buried 30.38
125W Flood (No Pole) 17.10
125W Flood (40ft Pole) 29.01
248W Flood (No Pole) 33.68
Monthly Rate
Pole Facility per Pole
30-foot wood pole $ 7.26
40-foot wood pole 11.92
55-foot wood pole 14.01
20-foot fiberglass 7.26
25-foot galvanized steel standard 11.33
30-foot galvanized steel standard*12.50
25-foot galvanized aluminum standard*13.81
30-foot fiberglass-pedestal base 34.62
30-foot steel-pedestal base 31.95
35-foot steel-direct buried 31.95
Exhibit No. 18 Case No. AVU-E-21-01 J. Miller, Avista
Schedule 2, Page 40 of 40
DAVID J. MEYER VICE PRESIDENT AND CHIEF COUNSEL FOR
REGULATORY & GOVERNMENTAL AFFAIRS
AVISTA CORPORATION P.O. BOX 3727 1411 EAST MISSION AVENUE SPOKANE, WASHINGTON 99220-3727
TELEPHONE: [phone] FACSIMILE: [phone] [e-mail]

BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION

IN THE MATTER OF THE APPLICATION ) CASE NO. AVU-E-21-01 OF AVISTA CORPORATION FOR THE ) CASE NO. AVU-G-21-01
AUTHORITY TO INCREASE ITS RATES ) AND CHARGES FOR ELECTRIC AND ) NATURAL GAS SERVICE TO ELECTRIC ) EXHIBIT NO. 18 AND NATURAL GAS CUSTOMERS IN THE )
STATE OF IDAHO ) JOSEPH D. MILLER

FOR AVISTA CORPORATION

(ELECTRIC AND NATURAL GAS)
Effective September 1, 2021
Base Tariff Base Tariff Base Total Billed Sch 76 Percent
Revenue Proposed Revenue Tariff Revenue Total Tax Total Increase on
Line Type of Schedule Under Present General Under Proposed Percent at Present General Rate Net Billed GRC
No. Service Number Rates(1) Increase Rates (1)Increase Rates(2) Increase Credit Impact Revenue
(a) (b) (c) (d) (e)(f)(g) (h) (i)(j) (k)
1 Residential 1 $113,042 $11,456 $124,498 10.1%$114,241 $11,456 ($11,456)$0 0.0%
2 General Service 11,12 $36,636 $3,712 $40,348 10.1%$38,291 $3,712 ($3,712)$0 0.0%
3 Large General Service 21,22 $47,822 $4,845 $52,667 10.1%$50,073 $4,845 ($4,845)$0 0.0%
4 Extra Large General Service 25 $17,876 $1,810 $19,686 10.1%$18,630 $1,810 ($1,810)$0 0.0%
5 Clearwater 25P $19,991 $2,026 $22,017 10.1%$20,840 $2,026 ($2,026)$0 0.0%
6 Pumping Service 31,32 $5,527 $560 $6,087 10.1%$5,766 $560 ($560)$0 0.0%
7 Street & Area Lights 41-49 $3,696 $374 $4,070 10.1%$3,842 $374 ($374)$0 0.0%
8 Total $244,590 $24,783 $269,373 10.1%$251,683 $24,783 ($24,783)$0 0.0%
Effective September 1, 2022
Base Tariff Base Tariff Base Total Billed Sch 76 Percent
Revenue Proposed Revenue Tariff Revenue Total Tax Total Increase on
Line Type of Schedule Under Present General Under Proposed Percent at Present General Rate Net Billed GRC
No. Service Number Rates(1) Increase Rates (1)Increase Rates(2) Increase Credit Impact Revenue
(a) (b) (c) (d) (e)(f)(g) (h) (i)(j) (k)
1 Residential 1 $124,498 $4,468 $128,966 3.6%$114,241 $4,468 $4,468 3.9%
2 General Service 11,12 $40,348 $1,307 $41,655 3.2%$38,291 $1,307 $1,307 3.4%
3 Large General Service 21,22 $52,667 $1,706 $54,373 3.2%$50,073 $1,706 $1,706 3.4%
4 Extra Large General Service 25 $19,686 $637 $20,323 3.2%$18,630 $637 $637 3.4%
5 Clearwater 25P $22,017 $275 $22,292 1.2%$20,840 $275 $275 1.3%
6 Pumping Service 31,32 $6,087 $197 $6,284 3.2%$5,766 $197 $197 3.4%
7 Street & Area Lights 41-49 $4,070 $132 $4,202 3.2%$3,842 $132 $132 3.4%
8 Total $269,373 $8,723 $278,096 3.2%$251,683 $8,723 $8,723 3.5%
(1) Excludes all present rate adjustments.
PROPOSED INCREASE BY SERVICE SCHEDULE
12 MONTHS ENDED DECEMBER 31, 2019
(000s of Dollars)
(2) Includes all present rate adjustments: Schedule 59 - Residential & Farm Energy Rate Adjustment, Schedule 66 - Temporary Power Cost Adjustment, Schedule 74 - Temporary Tax
Reform, and Schedule 91 - Energy Efficiency Rider Adjustment.
AVISTA UTILITIES
IDAHO ELECTRIC, CASE NO. AVU-E-21-01
Exhibit No. 18
Case No. AVU-E-20-01
J. Miller, Avista
Schedule 3, p. 1 of 4
AVISTA UTILITIES
IDAHO ELECTRIC, CASE NO. AVU-E-21-01
PRESENT & PROPOSED RATES OF RETURN BY RATE SCHEDULE
12 MONTHS ENDED DECEMBER 31, 2019
Present Rates Proposed Rates
Present Present Proposed Proposed
Line Type of Sch. Rate of Relative Rate of Relative
No.Service Number Return ROR Return ROR
(a) (b) (c)(d)(f)(g)
1 Residential 1 4.15%0.81 6.28%0.86
2 General Service 11,12 7.08%1.38 9.26%1.27
3 Large General Service 21,22 5.19%1.01 7.24%0.99
4 Extra Large General Svc. 25 4.23%0.82 6.59%0.90
5 Clearwater 25P 7.86%1.53 10.54%1.44
6 Pumping Service 31,32 5.46%1.06 7.41%1.01
7 Street & Area Lights 41-49 9.89%1.92 11.13%1.52
8 Total 5.15%1.00 7.30%1.00
Exhibit No. 18
Case No. AVU-E-21-01
J. Miller, Avista
Schedule 3, p. 2 of 4
AVISTA UTILITIES
IDAHO ELECTRIC, CASE NO. AVU-E-21-01
PRESENT AND PROPOSED RATE COMPONENTS BY SCHEDULE
General Schedule 76 Proposed Proposed
Base Tariff Present Present Rate Tax Credit Billing Base Tarif
Sch. Rate Other Adj.(1)Billing Rate Inc/(Decr)Change Rate Rate
(a) (b) (c) (d)(e) (f) (g) (h)
Residential Service - Schedule 1
Basic Charge $6.00 $6.00 $0.00 $6.00 $6.00
Energy Charge:
First 600 kWhs $0.08482 $0.00102 $0.08584 $0.00924 ($0.00924) $0.08584 $0.09406
All over 600 kWhs $0.09533 $0.00102 $0.09635 $0.01039 ($0.01039) $0.09635 $0.10572
General Services - Schedule 11
Basic Charge $13.00 $13.00 $0.00 $13.00 $13.00
Energy Charge:
First 3,650 kWhs $0.08909 $0.00453 $0.09362 $0.01048 ($0.01048) $0.09362 $0.09957
All over 3,650 kWhs $0.06244 $0.00453 $0.06697 $0.00735 ($0.00735) $0.06697 $0.06979
Demand Charge:
20 kW or less no charge no charge no charge no charge
Over 20 kW $6.00/kW $6.00/kW $6.00/kW $6.00/kW
Large General Service - Schedule 21
Energy Charge:
First 250,000 kWhs $0.05991 $0.00366 $0.06357 $0.00789 ($0.00789) $0.06357 $0.06780
All over (2) Includes all prese $0.05049 $0.00366 $0.05415 $0.00665 ($0.00665) $0.05415 $0.05714
Demand Charge:
50 kW or less $425.00 $425.00 $0.00 $425.00 $425.00
Over 50 kW $5.50/kW $5.50/kW $5.50/kW $5.50/kW
Primary Voltage Discount $0.20/kW $0.20/kW $0.20/kW $0.20/kW
Extra Large General Service - Schedule 25
Energy Charge:
First 500,000 kWhs $0.05208 $0.00234 $0.05442 $0.00645 ($0.00645) $0.05442 $0.05853
All over 500,000 kWhs $0.04363 $0.00234 $0.04597 $0.00540 ($0.00540) $0.04597 $0.04903
Demand Charge:
3,000 kva or less $14,000 $14,000 $14,000 $14,000
Over 3,000 kva $5.00/kva $5.00/kva $5.00/kva $5.00/kva
Primary Volt. Discount $0.20/kW $0.20/kW $0.20/kW $0.20/kW
Annual Minimum Present: $698,630 Proposed:$764,330
Clearwater - Schedule 25P
Energy Charge:
Block 1 Retail kWhs $0.04177 $0.00218 $0.04395 $0.00520 ($0.00520) $0.04395 $0.04697
Demand Charge:
3,000 kva or less $14,000 $14,000 $14,000 $14,000
3,000 - 55,000 kva $5.00/kva $5.00/kva $5.00/kva $5.00/kva
Over 55,000 kva $2.50/kva $2.50/kva $2.50/kva $2.50/kva
Primary Volt. Discount $0.20/kW $0.20/kW $0.20/kW $0.20/kW
Annual Minimum Present: $627,470 Proposed:$684,670
Pumping Service - Schedule 31
Basic Charge $11.00 $11.00 $0.00 $11.00 $11.00
Energy Charge:
First 165 kW/kWhs $0.09691 $0.00422 $0.10113 $0.01018 ($0.01018) $0.10113 $0.10709
All additional kWhs $0.08184 $0.00422 $0.08606 $0.00859 ($0.00859) $0.08606 $0.09043
(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.
Effective September 1, 2021
Exhibit No. 18
Case No. AVU-E-21-01
J. Miller, Avista
Schedule 3, Page 3 of 4
AVISTA UTILITIES
IDAHO ELECTRIC, CASE NO. AVU-E-21-01
PRESENT AND PROPOSED RATE COMPONENTS BY SCHEDULE
General Schedule 76 Proposed Proposed
Base Tariff Present Present Rate Tax Credit Billing Base Tarif
Sch. Rate Other Adj.(1)Billing Rate Inc/(Decr)Change Rate Rate
(a) (b) (c) (d)(e) (f) (g) (h)
Residential Service - Schedule 1
Basic Charge $6.00 $6.00 $2.00 $8.00 $8.00
Energy Charge:
First 600 kWhs $0.09406 ($0.00822) $0.08584 $0.00148 $0.08732 $0.09554
All over 600 kWhs $0.10572 ($0.00937) $0.09635 $0.00166 $0.09801 $0.10738
General Services - Schedule 11
Basic Charge $13.00 $13.00 $2.00 $15.00 $15.00
Energy Charge:
First 3,650 kWhs $0.09957 ($0.00595) $0.09362 $0.00181 $0.09543 $0.10138
All over 3,650 kWhs $0.06979 ($0.00282) $0.06697 $0.00127 $0.06824 $0.07106
Demand Charge:
20 kW or less no charge no charge no charge no charge
Over 20 kW $6.00/kW $6.00/kW $0.50/kW $6.50/kW $6.50/kW
Large General Service - Schedule 21
Energy Charge:
First 250,000 kWhs $0.06780 ($0.00423) $0.06357 $0.00039 $0.06396 $0.06819
All over (2) Includes all prese $0.05714 ($0.00299) $0.05415 $0.00033 $0.05448 $0.05747
Demand Charge:
50 kW or less $425.00 $425.00 $75.00 $500.00 $500.00
Over 50 kW $5.50/kW $5.50/kW $0.50/kW $6.00/kW $6.00/kW
Primary Voltage Discount $0.20/kW $0.20/kW $0.20/kW $0.20/kW
Extra Large General Service - Schedule 25
Energy Charge:
First 500,000 kWhs $0.05853 ($0.00411) $0.05442 $0.00057 $0.05499 $0.05910
All over 500,000 kWhs $0.04903 ($0.00306) $0.04597 $0.00048 $0.04645 $0.04951
Demand Charge:
3,000 kva or less $14,000 $14,000 $2,500 $16,500 $16,500
Over 3,000 kva $5.00/kva $5.00/kva $0.50/kva $5.50/kva $5.50/kva
Primary Volt. Discount $0.20/kW $0.20/kW $0.20/kW $0.20/kW
Annual Minimum Present: $764,330 Proposed:$800,150
Clearwater - Schedule 25P
Energy Charge:
Block 1 Retail kWhs $0.04697 ($0.00302) $0.04395 ($0.00017) $0.04378 $0.04680
Demand Charge:
3,000 kva or less $14,000 $14,000 $2,500 $16,500 $16,500
3,000 - 55,000 kva $5.00/kva $5.00/kva $0.50/kva $5.50/kva $5.50/kva
Over 55,000 kva $2.50/kva $2.50/kva $2.50/kva $2.50/kva
Primary Volt. Discount $0.20/kW $0.20/kW $0.20/kW $0.20/kW
Annual Minimum Present: $684,670 Proposed:$712,800
Pumping Service - Schedule 31
Basic Charge $11.00 $11.00 $2.00 $13.00 $13.00
Energy Charge:
First 165 kW/kWhs $0.10709 ($0.00596) $0.10113 $0.00295 $0.10408 $0.11004
All additional kWhs $0.09043 ($0.00437) $0.08606 $0.00249 $0.08855 $0.09292
(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.
Effective September 1, 2022
Exhibit No. 18
Case No. AVU-E-21-01
J. Miller, Avista
Schedule 3, Page 4 of 4
DAVID J. MEYER VICE PRESIDENT AND CHIEF COUNSEL FOR
REGULATORY & GOVERNMENTAL AFFAIRS
AVISTA CORPORATION P.O. BOX 3727 1411 EAST MISSION AVENUE SPOKANE, WASHINGTON 99220-3727
TELEPHONE: [phone] FACSIMILE: [phone] [e-mail]
BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF THE APPLICATION ) CASE NO. AVU-E-21-01 OF AVISTA CORPORATION FOR THE ) CASE NO. AVU-G-21-01
AUTHORITY TO INCREASE ITS RATES ) AND CHARGES FOR ELECTRIC AND ) NATURAL GAS SERVICE TO ELECTRIC ) EXHIBIT NO. 18 AND NATURAL GAS CUSTOMERS IN THE )
STATE OF IDAHO ) JOSEPH D. MILLER
FOR AVISTA CORPORATION
(ELECTRIC AND NATURAL GAS)
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 1 of 34
Replacement Thirteenth Revision Sheet 101
Canceling
I.P.U.C. No.27 Twelfth Revision Sheet 101
AVISTA CORPORATION
d/b/a Avista Utilities
Issued November 27, 2018 Effective January 1, 2019
Issued by Avista Utilities
By Patrick Ehrbar ,Director of Regulatory Affairs
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 $6.00
Charge Per Therm:
Base Rate 50.087¢
Minimum Charge: $6.00
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, Permanent Federal Income Tax Credit Schedule
172, Fixed Cost Adjustment Schedule 175 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.
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 2 of 34
Fourteenth Revision Sheet 101
Canceling
I.P.U.C. No.27 Replacement Thirteenth Revision Sheet 101
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar ,Director of Regulatory Affairs
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 $6.00
Charge Per Therm:
Base Rate 46.523¢
Minimum Charge: $6.00
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 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.
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 3 of 34

Replacement Fourteenth Revision Sheet 111
Canceling
I.P.U.C. No.27 Thirteenth Revision Sheet 111

AVISTA CORPORATION
d/b/a Avista Utilities
Issued November 27, 2018 Effective January 1, 2019

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

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 $0.53090
Next 800 $0.32402
Next 9,000 $0.24117
All Over $0.18639

Minimum Charge: $106.18 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, Permanent Federal Income Tax Credit Schedule
172, Fixed Cost Adjustment Schedule 175 and Energy Efficiency Rider Adjustment
Schedule 191.
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 4 of 34

Fifteenth Revision Sheet 111
Canceling
I.P.U.C. No.27 Replacement Fourteenth Revision Sheet 111

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 1, 2021

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

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 $0.53155
Next 800 $0.30543
Next 9,000 $0.22248
All Over $0.16763

Minimum Charge: $106.31 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 and Energy
Efficiency Rider Adjustment Schedule 191.
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 5 of 34

Second Revision Sheet 111A
Canceling
I.P.U.C. No.27 First Revision Sheet 111A

111
AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 23, 2010 Effective October 1, 2010

Issued by Avista Utilities
By Kelly Norwood , Vice-President, State & Federal Regulation

SCHEDULE 111 - Continued
LARGE GENERAL SERVICE - FIRM - IDAHO

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

For customers with annual usage greater then 250,000 therms, the prorated
share of deferred gas costs will be determined for individual customers served
under this Schedule who disconnect service or switch to a transportation sales
schedule. Disconnect service would include but not be limited to customers who
close their business or switch entirely to an alternative fuel. The deferred gas cost
balance for each Customer will be based on the difference between the purchased
gas costs collected through rates and the Company’s actual purchase gas cost
multiplied by the Customer’s therm usage each month. The deferred gas cost
balance for Customers who switch from this schedule will be transferred with the
customer’s account. The Customer shall have the option of 1) a lump-sum refund
or surcharge to eliminate the deferred gas cost balance, or 2) an amortization rate
per therm for a term equal to the deferral recovery period to reduce the deferred
gas cost balance prospectively provided the Customer has not discontinued
service. The Customer’s share of deferred gas costs incurred since the last
Purchase Gas Cost Adjustment is subject to a true-up for any modifications made
by the Commission in the next Purchase Gas Cost Adjustment. If the amount
billed is different than the Commission approved amount, Avista will bill or refund
the Customer the difference between their share of the approved amount and the
amount previously billed to the Customer.

Customers who temporarily close their account will be billed for any unpaid
monthly minimum charges at the time the account is reopened. This provision will
apply to a Customer who has closed and reopened an account at the same
address within a twelve-month period.

Qualifying Customers served under this Schedule who desire to change to
an interruptible or transportation service schedule must provide written notice to
the Company at least ninety (90) days prior to the effective date of the schedule
change.

Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 6 of 34

Second Revision Sheet 111A
Canceling
I.P.U.C. No.27 First Revision Sheet 111A

111
AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 23, 2010 Effective October 1, 2010

Issued by Avista Utilities
By Kelly Norwood , Vice-President, State & Federal Regulation

SCHEDULE 111 - Continued
LARGE GENERAL SERVICE - FIRM - IDAHO

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

For customers with annual usage greater then 250,000 therms, the prorated
share of deferred gas costs will be determined for individual customers served
under this Schedule who disconnect service or switch to a transportation sales
schedule. Disconnect service would include but not be limited to customers who
close their business or switch entirely to an alternative fuel. The deferred gas cost
balance for each Customer will be based on the difference between the purchased
gas costs collected through rates and the Company’s actual purchase gas cost
multiplied by the Customer’s therm usage each month. The deferred gas cost
balance for Customers who switch from this schedule will be transferred with the
customer’s account. The Customer shall have the option of 1) a lump-sum refund
or surcharge to eliminate the deferred gas cost balance, or 2) an amortization rate
per therm for a term equal to the deferral recovery period to reduce the deferred
gas cost balance prospectively provided the Customer has not discontinued
service. The Customer’s share of deferred gas costs incurred since the last
Purchase Gas Cost Adjustment is subject to a true-up for any modifications made
by the Commission in the next Purchase Gas Cost Adjustment. If the amount
billed is different than the Commission approved amount, Avista will bill or refund
the Customer the difference between their share of the approved amount and the
amount previously billed to the Customer.

Customers who temporarily close their account will be billed for any unpaid
monthly minimum charges at the time the account is reopened. This provision will
apply to a Customer who has closed and reopened an account at the same
address within a twelve-month period.

Qualifying Customers served under this Schedule who desire to change to
an interruptible or transportation service schedule must provide written notice to
the Company at least ninety (90) days prior to the effective date of the schedule
change.

Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 7 of 34

Replacement Fourteenth Revision Sheet 131
Canceling
I.P.U.C. No.27 Thirteenth Revision Sheet 131

AVISTA CORPORATION
d/b/a Avista Utilities
Issued November 27, 2018 Effective January 1, 2019
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

SCHEDULE 131

INTERRUPTIBLE SERVICE - IDAHO

AVAILABLE:
To Customers in the State of Idaho whose requirements exceed 250,000
therms of gas per year and who comply with the Special Terms and Conditions set
forth below, provided: (1) A volume of off-peak interruptible gas for the service
requested is available to the Company and, (2) The Company's existing distribution
system has capacity, in excess of its existing requirements for firm gas service,
adequate for the service requested by Customer.

APPLICABLE:
To interruptible gas service for any purpose subject to provisions 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 and metering.

MONTHLY RATE: Per Meter
Per Month
Charge Per Therm:

Base Rate 22.609¢

ANNUAL MINIMUM:
Each Customer shall be subject to an Annual Minimum Deficiency Charge if
their gas usage during the prior year did not equal or exceed 250,000 therms.
Such annual Minimum Deficiency Charge shall be determined by subtracting the
Customer’s actual usage for the twelve-month period ending each August from
250,000 therms multiplied by 22.609¢ per therm.

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, Permanent Federal Income Tax Credit Schedule
172 and Energy Efficiency Rider Adjustment Schedule 191.
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 8 of 34

Fifteenth Revision Sheet 131
Canceling
I.P.U.C. No.27 Replacement Fourteenth Revision Sheet 131

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

SCHEDULE 131

INTERRUPTIBLE SERVICE - IDAHO

AVAILABLE:
To Customers in the State of Idaho whose requirements exceed 250,000
therms of gas per year and who comply with the Special Terms and Conditions set
forth below, provided: (1) A volume of off-peak interruptible gas for the service
requested is available to the Company and, (2) The Company's existing distribution
system has capacity, in excess of its existing requirements for firm gas service,
adequate for the service requested by Customer.

APPLICABLE:
To interruptible gas service for any purpose subject to provisions 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 and metering.

MONTHLY RATE: Per Meter
Per Month
Charge Per Therm:

Base Rate 20.737¢

ANNUAL MINIMUM:
Each Customer shall be subject to an Annual Minimum Deficiency Charge if
their gas usage during the prior year did not equal or exceed 250,000 therms.
Such annual Minimum Deficiency Charge shall be determined by subtracting the
Customer’s actual usage for the twelve-month period ending each August from
250,000 therms multiplied by 20.737¢ per therm.

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 and Energy Efficiency Rider Adjustment Schedule
191.
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 9 of 34

Third Revision Sheet 131A
Canceling
I.P.U.C. No. 27 Second Revision Sheet 131A

131A
AVISTA CORPORATION
d/b/a Avista Utilities
Issued October 24, 2019 Effective October 25, 2019
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

SCHEDULE 131 - continued

TERMS AND CONDITIONS:
1. Service under this schedule shall be subject to interruption at such times
and in such amounts as, in the Company's judgment, interruption is necessary. Avista
(“Company”) will not be liable for damages occasioned by interruption of service supplied
under this schedule. In addition, service under this schedule shall be subject to
Curtailment conditions in accordance with the Company’s Schedule 182, “Plan for Natural
Gas Service Curtailment.”

2. Avista recommends that the Customer, at their expense, provide and
maintain standby facilities to continue operations with a substitute fuel in the event of
partial Curtailment or total interruption of the natural gas supply. In the event that the
Customer does not have adequate standby facilities, Avista will not be liable for damages
occasioned by the Curtailment or interruption of service supplied under this schedule.

3. Natural gas service supplied under this schedule shall not be
interchangeable with any other natural gas service available from Company.

4. Upon the request of Avista, Customer shall read the Company's meter at
the beginning of each day and report said reading to Avista daily; further, Customer shall
from time to time submit estimates of its daily, monthly and annual volumes of natural gas
required hereunder, including peak day requirements, together with such other operating
data as Avista may require in order to schedule its operations and to meet its system
requirements.

5. Customers served under this schedule who desire to change to a firm sales
service schedule must provide written notice to the Company at least ninety (90) days
prior to the effective date of the desired schedule change. At the Company’s sole
discretion, it may grant a Customer’s request to transfer to a firm sales service schedule
with less than ninety (90) days’ notice. The availability for a Customer to change to a firm
sales service schedule will be based on Avista’s sole judgement that the existing
distribution system has capacity adequate for the service requested by Customer. In the
event that there is no availability for the Customer to change to a firm sales service
schedule on their desired date due to capacity or natural gas supply constraints, Avista
will provide an estimated date for when the Customer is able to change schedules.

6. Customers served under this schedule who desire to change to a
transportation service schedule must meet the terms and conditions specified in Schedule
181, “Natural Gas Transportation Service Terms and Conditions”, and provide written
notice to the Company at least ninety (90) days prior to the effective date of the schedule
change.

Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 10 of 34

Third Revision Sheet 131A
Canceling
I.P.U.C. No. 27 Second Revision Sheet 131A

131A
AVISTA CORPORATION
d/b/a Avista Utilities
Issued October 24, 2019 Effective October 25, 2019
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

SCHEDULE 131 - continued

TERMS AND CONDITIONS:
1. Service under this schedule shall be subject to interruption at such times
and in such amounts as, in the Company's judgment, interruption is necessary. Avista
(“Company”) will not be liable for damages occasioned by interruption of service supplied
under this schedule. In addition, service under this schedule shall be subject to
Curtailment conditions in accordance with the Company’s Schedule 182, “Plan for Natural
Gas Service Curtailment.”

2. Avista recommends that the Customer, at their expense, provide and
maintain standby facilities to continue operations with a substitute fuel in the event of
partial Curtailment or total interruption of the natural gas supply. In the event that the
Customer does not have adequate standby facilities, Avista will not be liable for damages
occasioned by the Curtailment or interruption of service supplied under this schedule.

3. Natural gas service supplied under this schedule shall not be
interchangeable with any other natural gas service available from Company.

4. Upon the request of Avista, Customer shall read the Company's meter at
the beginning of each day and report said reading to Avista daily; further, Customer shall
from time to time submit estimates of its daily, monthly and annual volumes of natural gas
required hereunder, including peak day requirements, together with such other operating
data as Avista may require in order to schedule its operations and to meet its system
requirements.

5. Customers served under this schedule who desire to change to a firm sales
service schedule must provide written notice to the Company at least ninety (90) days
prior to the effective date of the desired schedule change. At the Company’s sole
discretion, it may grant a Customer’s request to transfer to a firm sales service schedule
with less than ninety (90) days’ notice. The availability for a Customer to change to a firm
sales service schedule will be based on Avista’s sole judgement that the existing
distribution system has capacity adequate for the service requested by Customer. In the
event that there is no availability for the Customer to change to a firm sales service
schedule on their desired date due to capacity or natural gas supply constraints, Avista
will provide an estimated date for when the Customer is able to change schedules.

6. Customers served under this schedule who desire to change to a
transportation service schedule must meet the terms and conditions specified in Schedule
181, “Natural Gas Transportation Service Terms and Conditions”, and provide written
notice to the Company at least ninety (90) days prior to the effective date of the schedule
change.

Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 11 of 34

Issued October 24, 2019 Effective October 25, 2019
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs
Third Revision Sheet 131B
Canceling
I.P.U.C. No. 27 Second Revision Sheet 131B

131B
AVISTA CORPORATION
d/b/a Avista Utilities

SCHEDULE 131 - continued

7. For customers with annual usage greater then 250,000 therms, the
prorated share of deferred natural gas costs will be determined for individual
customers served under this Schedule who disconnect service or switch to a
transportation sales schedule. Disconnect service would include but not be limited to
customers who close their business or switch entirely to an alternative fuel. The
deferred natural gas cost balance for each Customer will be based on the difference
between the purchased gas costs collected through rates and the Company’s actual
purchase gas cost multiplied by the Customer’s therm usage each month. The
deferred natural gas cost balance for Customers who switch from this schedule will be
transferred with the customer’s account. The Customer shall have the option of 1) a
lump-sum refund or surcharge to eliminate the deferred natural gas cost balance, or
2) an amortization rate per therm for a term equal to the deferral recovery period to
reduce the deferred natural gas cost balance prospectively provided the Customer
has not discontinued service. The Customer’s share of deferred natural gas costs
incurred since the last Purchase Gas Cost Adjustment is subject to a true-up for any
modifications made by the Commission in the next Purchase Gas Cost Adjustment. If
the amount billed is different than the Commission approved amount, Avista will bill or
refund the Customer the difference between their share of the approved amount and
the amount previously billed to the Customer.

8. Service under this schedule is subject to the Rules and Regulations
contained in all applicable schedules of Avista’s tariff book I.P.U.C. No. 27.

Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 12 of 34

Issued October 24, 2019 Effective October 25, 2019
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs
Third Revision Sheet 131B
Canceling
I.P.U.C. No. 27 Second Revision Sheet 131B

131B
AVISTA CORPORATION
d/b/a Avista Utilities

SCHEDULE 131 - continued

7. For customers with annual usage greater then 250,000 therms, the
prorated share of deferred natural gas costs will be determined for individual
customers served under this Schedule who disconnect service or switch to a
transportation sales schedule. Disconnect service would include but not be limited to
customers who close their business or switch entirely to an alternative fuel. The
deferred natural gas cost balance for each Customer will be based on the difference
between the purchased gas costs collected through rates and the Company’s actual
purchase gas cost multiplied by the Customer’s therm usage each month. The
deferred natural gas cost balance for Customers who switch from this schedule will be
transferred with the customer’s account. The Customer shall have the option of 1) a
lump-sum refund or surcharge to eliminate the deferred natural gas cost balance, or
2) an amortization rate per therm for a term equal to the deferral recovery period to
reduce the deferred natural gas cost balance prospectively provided the Customer
has not discontinued service. The Customer’s share of deferred natural gas costs
incurred since the last Purchase Gas Cost Adjustment is subject to a true-up for any
modifications made by the Commission in the next Purchase Gas Cost Adjustment. If
the amount billed is different than the Commission approved amount, Avista will bill or
refund the Customer the difference between their share of the approved amount and
the amount previously billed to the Customer.

8. Service under this schedule is subject to the Rules and Regulations
contained in all applicable schedules of Avista’s tariff book I.P.U.C. No. 27.

Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 13 of 34

Replacement Thirteenth Revision Sheet 146
Canceling
I.P.U.C. No.27 Twelfth Revision Sheet 146

AVISTA CORPORATION
d/b/a Avista Utilities
Issued November 9, 2018 Effective January 1, 2019
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

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:

$250.00 Customer Charge, plus

Charge Per Therm:

Base Rate 13.441¢

ANNUAL MINIMUM:
$36,603 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, Permanent Federal
Income Tax Credit Schedule 172 and Energy Efficiency Rider Adjustment Schedule
191.

Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 14 of 34

Fourteenth Revision Sheet 146
Canceling
I.P.U.C. No.27 Replacement Thirteenth Revision Sheet 146

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

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:

$250.00 Customer Charge, plus

Charge Per Therm:

Base Rate 12.563¢

ANNUAL MINIMUM:
$34.408 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 and Energy Efficiency
Rider Adjustment Schedule 191.

Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 15 of 34

Sixth Revision Sheet 146A
Canceling
I.P.U.C. No.27 Fifth Sheet 146A
146B
AVISTA CORPORATION
d/b/a Avista Utilities
Issued October 24, 2019 Effective October 25, 2019
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs
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.

Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 16 of 34

Sixth Revision Sheet 146A
Canceling
I.P.U.C. No.27 Fifth Sheet 146A
146B
AVISTA CORPORATION
d/b/a Avista Utilities
Issued October 24, 2019 Effective October 25, 2019
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs
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.

Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 17 of 34
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 18 of 34

Fourteenth Revision Sheet 101
Canceling
I.P.U.C. No.27 Replacement Thirteenth Revision Sheet 101

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar ,Director of Regulatory Affairs

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 $6.00

Charge Per Therm:

Base Rate 46.523¢

Minimum Charge: $6.00

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 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.

Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 19 of 34

Fifteenth Revision Sheet 101
Canceling
I.P.U.C. No.27 Fourteenth Revision Sheet 101

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
Issued by Avista Utilities
By Patrick Ehrbar ,Director of Regulatory Affairs

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 $8.00

Charge Per Therm:

Base Rate 44.574¢

Minimum Charge: $8.00

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 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.

Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 20 of 34

Fifteenth Revision Sheet 111
Canceling
I.P.U.C. No.27 Replacement Fourteenth Revision Sheet 111

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 1, 2021

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

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 $0.53155
Next 800 $0.30543
Next 9,000 $0.22248
All Over $0.16763

Minimum Charge: $106.31 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 and Energy
Efficiency Rider Adjustment Schedule 191.
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 21 of 34

Sixteenth Revision Sheet 111
Canceling
I.P.U.C. No.27 Fifteenth Revision Sheet 111

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022

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

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 $0.52205
Next 800 $0.31634
Next 9,000 $0.23043
All Over $0.17362

Minimum Charge: $104.41 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 and Energy
Efficiency Rider Adjustment Schedule 191.
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 22 of 34

Second Revision Sheet 111A
Canceling
I.P.U.C. No.27 First Revision Sheet 111A

111
AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 23, 2010 Effective October 1, 2010

Issued by Avista Utilities
By Kelly Norwood , Vice-President, State & Federal Regulation

SCHEDULE 111 - Continued
LARGE GENERAL SERVICE - FIRM - IDAHO

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

For customers with annual usage greater then 250,000 therms, the prorated
share of deferred gas costs will be determined for individual customers served
under this Schedule who disconnect service or switch to a transportation sales
schedule. Disconnect service would include but not be limited to customers who
close their business or switch entirely to an alternative fuel. The deferred gas cost
balance for each Customer will be based on the difference between the purchased
gas costs collected through rates and the Company’s actual purchase gas cost
multiplied by the Customer’s therm usage each month. The deferred gas cost
balance for Customers who switch from this schedule will be transferred with the
customer’s account. The Customer shall have the option of 1) a lump-sum refund
or surcharge to eliminate the deferred gas cost balance, or 2) an amortization rate
per therm for a term equal to the deferral recovery period to reduce the deferred
gas cost balance prospectively provided the Customer has not discontinued
service. The Customer’s share of deferred gas costs incurred since the last
Purchase Gas Cost Adjustment is subject to a true-up for any modifications made
by the Commission in the next Purchase Gas Cost Adjustment. If the amount
billed is different than the Commission approved amount, Avista will bill or refund
the Customer the difference between their share of the approved amount and the
amount previously billed to the Customer.

Customers who temporarily close their account will be billed for any unpaid
monthly minimum charges at the time the account is reopened. This provision will
apply to a Customer who has closed and reopened an account at the same
address within a twelve-month period.

Qualifying Customers served under this Schedule who desire to change to
an interruptible or transportation service schedule must provide written notice to
the Company at least ninety (90) days prior to the effective date of the schedule
change.

Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 23 of 34

Second Revision Sheet 111A
Canceling
I.P.U.C. No.27 First Revision Sheet 111A

111
AVISTA CORPORATION
d/b/a Avista Utilities
Issued September 23, 2010 Effective October 1, 2010

Issued by Avista Utilities
By Kelly Norwood , Vice-President, State & Federal Regulation

SCHEDULE 111 - Continued
LARGE GENERAL SERVICE - FIRM - IDAHO

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

For customers with annual usage greater then 250,000 therms, the prorated
share of deferred gas costs will be determined for individual customers served
under this Schedule who disconnect service or switch to a transportation sales
schedule. Disconnect service would include but not be limited to customers who
close their business or switch entirely to an alternative fuel. The deferred gas cost
balance for each Customer will be based on the difference between the purchased
gas costs collected through rates and the Company’s actual purchase gas cost
multiplied by the Customer’s therm usage each month. The deferred gas cost
balance for Customers who switch from this schedule will be transferred with the
customer’s account. The Customer shall have the option of 1) a lump-sum refund
or surcharge to eliminate the deferred gas cost balance, or 2) an amortization rate
per therm for a term equal to the deferral recovery period to reduce the deferred
gas cost balance prospectively provided the Customer has not discontinued
service. The Customer’s share of deferred gas costs incurred since the last
Purchase Gas Cost Adjustment is subject to a true-up for any modifications made
by the Commission in the next Purchase Gas Cost Adjustment. If the amount
billed is different than the Commission approved amount, Avista will bill or refund
the Customer the difference between their share of the approved amount and the
amount previously billed to the Customer.

Customers who temporarily close their account will be billed for any unpaid
monthly minimum charges at the time the account is reopened. This provision will
apply to a Customer who has closed and reopened an account at the same
address within a twelve-month period.

Qualifying Customers served under this Schedule who desire to change to
an interruptible or transportation service schedule must provide written notice to
the Company at least ninety (90) days prior to the effective date of the schedule
change.

Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 24 of 34

Fifteenth Revision Sheet 131
Canceling
I.P.U.C. No.27 Replacement Fourteenth Revision Sheet 131

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

SCHEDULE 131

INTERRUPTIBLE SERVICE - IDAHO

AVAILABLE:
To Customers in the State of Idaho whose requirements exceed 250,000
therms of gas per year and who comply with the Special Terms and Conditions set
forth below, provided: (1) A volume of off-peak interruptible gas for the service
requested is available to the Company and, (2) The Company's existing distribution
system has capacity, in excess of its existing requirements for firm gas service,
adequate for the service requested by Customer.

APPLICABLE:
To interruptible gas service for any purpose subject to provisions 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 and metering.

MONTHLY RATE: Per Meter
Per Month
Charge Per Therm:

Base Rate 20.737¢

ANNUAL MINIMUM:
Each Customer shall be subject to an Annual Minimum Deficiency Charge if
their gas usage during the prior year did not equal or exceed 250,000 therms.
Such annual Minimum Deficiency Charge shall be determined by subtracting the
Customer’s actual usage for the twelve-month period ending each August from
250,000 therms multiplied by 20.737¢ per therm.

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 and Energy Efficiency Rider Adjustment Schedule
191.
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 25 of 34

Sixteenth Revision Sheet 131
Canceling
I.P.U.C. No.27 Fifteenth Revision Sheet 131

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

SCHEDULE 131

INTERRUPTIBLE SERVICE - IDAHO

AVAILABLE:
To Customers in the State of Idaho whose requirements exceed 250,000
therms of gas per year and who comply with the Special Terms and Conditions set
forth below, provided: (1) A volume of off-peak interruptible gas for the service
requested is available to the Company and, (2) The Company's existing distribution
system has capacity, in excess of its existing requirements for firm gas service,
adequate for the service requested by Customer.

APPLICABLE:
To interruptible gas service for any purpose subject to provisions 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 and metering.

MONTHLY RATE: Per Meter
Per Month
Charge Per Therm:

Base Rate 21.188¢

ANNUAL MINIMUM:
Each Customer shall be subject to an Annual Minimum Deficiency Charge if
their gas usage during the prior year did not equal or exceed 250,000 therms.
Such annual Minimum Deficiency Charge shall be determined by subtracting the
Customer’s actual usage for the twelve-month period ending each August from
250,000 therms multiplied by 21.188¢ per therm.

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 and Energy Efficiency Rider Adjustment Schedule
191.
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 26 of 34

Third Revision Sheet 131A
Canceling
I.P.U.C. No. 27 Second Revision Sheet 131A

131A
AVISTA CORPORATION
d/b/a Avista Utilities
Issued October 24, 2019 Effective October 25, 2019
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

SCHEDULE 131 - continued

TERMS AND CONDITIONS:
1. Service under this schedule shall be subject to interruption at such times
and in such amounts as, in the Company's judgment, interruption is necessary. Avista
(“Company”) will not be liable for damages occasioned by interruption of service supplied
under this schedule. In addition, service under this schedule shall be subject to
Curtailment conditions in accordance with the Company’s Schedule 182, “Plan for Natural
Gas Service Curtailment.”

2. Avista recommends that the Customer, at their expense, provide and
maintain standby facilities to continue operations with a substitute fuel in the event of
partial Curtailment or total interruption of the natural gas supply. In the event that the
Customer does not have adequate standby facilities, Avista will not be liable for damages
occasioned by the Curtailment or interruption of service supplied under this schedule.

3. Natural gas service supplied under this schedule shall not be
interchangeable with any other natural gas service available from Company.

4. Upon the request of Avista, Customer shall read the Company's meter at
the beginning of each day and report said reading to Avista daily; further, Customer shall
from time to time submit estimates of its daily, monthly and annual volumes of natural gas
required hereunder, including peak day requirements, together with such other operating
data as Avista may require in order to schedule its operations and to meet its system
requirements.

5. Customers served under this schedule who desire to change to a firm sales
service schedule must provide written notice to the Company at least ninety (90) days
prior to the effective date of the desired schedule change. At the Company’s sole
discretion, it may grant a Customer’s request to transfer to a firm sales service schedule
with less than ninety (90) days’ notice. The availability for a Customer to change to a firm
sales service schedule will be based on Avista’s sole judgement that the existing
distribution system has capacity adequate for the service requested by Customer. In the
event that there is no availability for the Customer to change to a firm sales service
schedule on their desired date due to capacity or natural gas supply constraints, Avista
will provide an estimated date for when the Customer is able to change schedules.

6. Customers served under this schedule who desire to change to a
transportation service schedule must meet the terms and conditions specified in Schedule
181, “Natural Gas Transportation Service Terms and Conditions”, and provide written
notice to the Company at least ninety (90) days prior to the effective date of the schedule
change.

Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 27 of 34

Third Revision Sheet 131A
Canceling
I.P.U.C. No. 27 Second Revision Sheet 131A

131A
AVISTA CORPORATION
d/b/a Avista Utilities
Issued October 24, 2019 Effective October 25, 2019
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

SCHEDULE 131 - continued

TERMS AND CONDITIONS:
1. Service under this schedule shall be subject to interruption at such times
and in such amounts as, in the Company's judgment, interruption is necessary. Avista
(“Company”) will not be liable for damages occasioned by interruption of service supplied
under this schedule. In addition, service under this schedule shall be subject to
Curtailment conditions in accordance with the Company’s Schedule 182, “Plan for Natural
Gas Service Curtailment.”

2. Avista recommends that the Customer, at their expense, provide and
maintain standby facilities to continue operations with a substitute fuel in the event of
partial Curtailment or total interruption of the natural gas supply. In the event that the
Customer does not have adequate standby facilities, Avista will not be liable for damages
occasioned by the Curtailment or interruption of service supplied under this schedule.

3. Natural gas service supplied under this schedule shall not be
interchangeable with any other natural gas service available from Company.

4. Upon the request of Avista, Customer shall read the Company's meter at
the beginning of each day and report said reading to Avista daily; further, Customer shall
from time to time submit estimates of its daily, monthly and annual volumes of natural gas
required hereunder, including peak day requirements, together with such other operating
data as Avista may require in order to schedule its operations and to meet its system
requirements.

5. Customers served under this schedule who desire to change to a firm sales
service schedule must provide written notice to the Company at least ninety (90) days
prior to the effective date of the desired schedule change. At the Company’s sole
discretion, it may grant a Customer’s request to transfer to a firm sales service schedule
with less than ninety (90) days’ notice. The availability for a Customer to change to a firm
sales service schedule will be based on Avista’s sole judgement that the existing
distribution system has capacity adequate for the service requested by Customer. In the
event that there is no availability for the Customer to change to a firm sales service
schedule on their desired date due to capacity or natural gas supply constraints, Avista
will provide an estimated date for when the Customer is able to change schedules.

6. Customers served under this schedule who desire to change to a
transportation service schedule must meet the terms and conditions specified in Schedule
181, “Natural Gas Transportation Service Terms and Conditions”, and provide written
notice to the Company at least ninety (90) days prior to the effective date of the schedule
change.

Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 28 of 34

Issued October 24, 2019 Effective October 25, 2019
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs
Third Revision Sheet 131B
Canceling
I.P.U.C. No. 27 Second Revision Sheet 131B

131B
AVISTA CORPORATION
d/b/a Avista Utilities

SCHEDULE 131 - continued

7. For customers with annual usage greater then 250,000 therms, the
prorated share of deferred natural gas costs will be determined for individual
customers served under this Schedule who disconnect service or switch to a
transportation sales schedule. Disconnect service would include but not be limited to
customers who close their business or switch entirely to an alternative fuel. The
deferred natural gas cost balance for each Customer will be based on the difference
between the purchased gas costs collected through rates and the Company’s actual
purchase gas cost multiplied by the Customer’s therm usage each month. The
deferred natural gas cost balance for Customers who switch from this schedule will be
transferred with the customer’s account. The Customer shall have the option of 1) a
lump-sum refund or surcharge to eliminate the deferred natural gas cost balance, or
2) an amortization rate per therm for a term equal to the deferral recovery period to
reduce the deferred natural gas cost balance prospectively provided the Customer
has not discontinued service. The Customer’s share of deferred natural gas costs
incurred since the last Purchase Gas Cost Adjustment is subject to a true-up for any
modifications made by the Commission in the next Purchase Gas Cost Adjustment. If
the amount billed is different than the Commission approved amount, Avista will bill or
refund the Customer the difference between their share of the approved amount and
the amount previously billed to the Customer.

8. Service under this schedule is subject to the Rules and Regulations
contained in all applicable schedules of Avista’s tariff book I.P.U.C. No. 27.

Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 29 of 34

Issued October 24, 2019 Effective October 25, 2019
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs
Third Revision Sheet 131B
Canceling
I.P.U.C. No. 27 Second Revision Sheet 131B

131B
AVISTA CORPORATION
d/b/a Avista Utilities

SCHEDULE 131 - continued

7. For customers with annual usage greater then 250,000 therms, the
prorated share of deferred natural gas costs will be determined for individual
customers served under this Schedule who disconnect service or switch to a
transportation sales schedule. Disconnect service would include but not be limited to
customers who close their business or switch entirely to an alternative fuel. The
deferred natural gas cost balance for each Customer will be based on the difference
between the purchased gas costs collected through rates and the Company’s actual
purchase gas cost multiplied by the Customer’s therm usage each month. The
deferred natural gas cost balance for Customers who switch from this schedule will be
transferred with the customer’s account. The Customer shall have the option of 1) a
lump-sum refund or surcharge to eliminate the deferred natural gas cost balance, or
2) an amortization rate per therm for a term equal to the deferral recovery period to
reduce the deferred natural gas cost balance prospectively provided the Customer
has not discontinued service. The Customer’s share of deferred natural gas costs
incurred since the last Purchase Gas Cost Adjustment is subject to a true-up for any
modifications made by the Commission in the next Purchase Gas Cost Adjustment. If
the amount billed is different than the Commission approved amount, Avista will bill or
refund the Customer the difference between their share of the approved amount and
the amount previously billed to the Customer.

8. Service under this schedule is subject to the Rules and Regulations
contained in all applicable schedules of Avista’s tariff book I.P.U.C. No. 27.

Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 30 of 34

Fourteenth Revision Sheet 146
Canceling
I.P.U.C. No.27 Replacement Thirteenth Revision Sheet 146

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

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:

$250.00 Customer Charge, plus

Charge Per Therm:

Base Rate 12.563¢

ANNUAL MINIMUM:
$34.408 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 and Energy Efficiency
Rider Adjustment Schedule 191.

Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 31 of 34

Fifteenth Revision Sheet 146
Canceling
I.P.U.C. No.27 Fourteenth Revision Sheet 146

AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs

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 12.761¢

ANNUAL MINIMUM:
$35,503 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 and Energy Efficiency
Rider Adjustment Schedule 191.

Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 32 of 34

Sixth Revision Sheet 146A
Canceling
I.P.U.C. No.27 Fifth Sheet 146A
146B
AVISTA CORPORATION
d/b/a Avista Utilities
Issued October 24, 2019 Effective October 25, 2019
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs
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.

Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 33 of 34

Sixth Revision Sheet 146A
Canceling
I.P.U.C. No.27 Fifth Sheet 146A
146B
AVISTA CORPORATION
d/b/a Avista Utilities
Issued October 24, 2019 Effective October 25, 2019
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs
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.

Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 4, Page 34 of 34
DAVID J. MEYER VICE PRESIDENT AND CHIEF COUNSEL FOR
REGULATORY & GOVERNMENTAL AFFAIRS
AVISTA CORPORATION P.O. BOX 3727 1411 EAST MISSION AVENUE SPOKANE, WASHINGTON 99220-3727
TELEPHONE: [phone] FACSIMILE: [phone] [e-mail]
BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF THE APPLICATION ) CASE NO. AVU-E-21-01 OF AVISTA CORPORATION FOR THE ) CASE NO. AVU-G-21-01
AUTHORITY TO INCREASE ITS RATES ) AND CHARGES FOR ELECTRIC AND ) NATURAL GAS SERVICE TO ELECTRIC ) EXHIBIT NO. 18 AND NATURAL GAS CUSTOMERS IN THE )
STATE OF IDAHO ) JOSEPH D. MILLER
FOR AVISTA CORPORATION
(ELECTRIC AND NATURAL GAS)
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 5, Page 1 of 12
Fourteenth Revision Sheet 101
Canceling
I.P.U.C. No.27 Replacement Thirteenth Revision Sheet 101
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar ,Director of Regulatory Affairs
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 $6.00
Charge Per Therm:
Base Rate 46.523¢
Minimum Charge: $6.00
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 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.
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 5, Page 2 of 12
Fifteenth Revision Sheet 111
Canceling
I.P.U.C. No.27 Replacement Fourteenth Revision Sheet 111
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar , Director of Regulatory Affairs
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 $0.53155
Next 800 $0.30543
Next 9,000 $0.22248
All Over $0.16763
Minimum Charge: $106.31 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 and Energy
Efficiency Rider Adjustment Schedule 191.
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 5, Page 3 of 12
Fifteenth Revision Sheet 131
Canceling
I.P.U.C. No.27 Replacement Fourteenth Revision Sheet 131
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 1, 2021
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs
SCHEDULE 131
INTERRUPTIBLE SERVICE - IDAHO
AVAILABLE:
To Customers in the State of Idaho whose requirements exceed 250,000
therms of gas per year and who comply with the Special Terms and Conditions set
forth below, provided: (1) A volume of off-peak interruptible gas for the service
requested is available to the Company and, (2) The Company's existing distribution
system has capacity, in excess of its existing requirements for firm gas service,
adequate for the service requested by Customer.
APPLICABLE:
To interruptible gas service for any purpose subject to provisions 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 and metering.
MONTHLY RATE: Per Meter
Per Month
Charge Per Therm:
Base Rate 20.737¢
ANNUAL MINIMUM:
Each Customer shall be subject to an Annual Minimum Deficiency Charge if
their gas usage during the prior year did not equal or exceed 250,000 therms.
Such annual Minimum Deficiency Charge shall be determined by subtracting the
Customer’s actual usage for the twelve-month period ending each August from
250,000 therms multiplied by 20.737¢ per therm.
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 and Energy Efficiency Rider Adjustment Schedule
191.
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 5, Page 4 of 12
Fourteenth Revision Sheet 146 Canceling

By Patrick Ehrbar, Director of Regulatory Affairs
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:
$250.00 Customer Charge, plus
Charge Per Therm:
Base Rate 12.563¢
ANNUAL MINIMUM: $34,408 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 and Energy Efficiency Rider Adjustment Schedule 191.
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 5, Page 5 of 12
I.P.U.C. No.27 Original Sheet 176
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective March 1, 2021
Issued by Avista Corporation
By Patrick Ehrbar, Director of Regulatory Affairs
SCHEDULE 176
TAX CUSTOMER CREDIT - IDAHO
APPLICABLE:
To Customers in the State of Idaho where the Company has natural
gas service available. This Temporary Federal Income Tax Rate Credit shall be applicable
to all retail customers taking service under Schedules 101, 111, 112, and 146.
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:
Schedule 101 $0.01567 per Therm
Schedule 111 & 112 $0.00811 per Therm
Schedule 146 $0.00365 per Therm
TERM:
The Tax Customer Credit will be in effect for a ten-year period from September 1, 2021
through August 31, 2031. Any residual balance at the end of the ten-year 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 158.
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 5, Page 6 of 12
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 5, Page 7 of 12
Fifteenth Revision Sheet 101
Canceling
I.P.U.C. No.27 Fourteenth Revision Sheet 101
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
Issued by Avista Utilities
By Patrick Ehrbar ,Director of Regulatory Affairs
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 $8.00
Charge Per Therm:
Base Rate 44.574¢
Minimum Charge: $8.00
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 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.
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 5, Page 8 of 12
Sixteenth Revision Sheet 111
Canceling
I.P.U.C. No.27 Fifteenth Revision Sheet 111
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
Issued by Avista Utilities
By Patrick Ehrbar , Director of Regulatory Affairs
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 $0.52205
Next 800 $0.31634
Next 9,000 $0.23043
All Over $0.17362
Minimum Charge: $104.41 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 and Energy
Efficiency Rider Adjustment Schedule 191.
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 5, Page 9 of 12
Sixteenth Revision Sheet 131
Canceling
I.P.U.C. No.27 Fifteenth Revision Sheet 131
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs
SCHEDULE 131
INTERRUPTIBLE SERVICE - IDAHO
AVAILABLE:
To Customers in the State of Idaho whose requirements exceed 250,000
therms of gas per year and who comply with the Special Terms and Conditions set
forth below, provided: (1) A volume of off-peak interruptible gas for the service
requested is available to the Company and, (2) The Company's existing distribution
system has capacity, in excess of its existing requirements for firm gas service,
adequate for the service requested by Customer.
APPLICABLE:
To interruptible gas service for any purpose subject to provisions 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 and metering.
MONTHLY RATE: Per Meter
Per Month
Charge Per Therm:
Base Rate 21.188¢
ANNUAL MINIMUM:
Each Customer shall be subject to an Annual Minimum Deficiency Charge if
their gas usage during the prior year did not equal or exceed 250,000 therms.
Such annual Minimum Deficiency Charge shall be determined by subtracting the
Customer’s actual usage for the twelve-month period ending each August from
250,000 therms multiplied by 21.188¢ per therm.
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 and Energy Efficiency Rider Adjustment Schedule
191.
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 5, Page 10 of 12
Fifteenth Revision Sheet 146
Canceling
I.P.U.C. No.27 Fourteenth Revision Sheet 146
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
Issued by Avista Utilities
By Patrick Ehrbar, Director of Regulatory Affairs
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 12.761¢
ANNUAL MINIMUM:
$35,503 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 and Energy Efficiency
Rider Adjustment Schedule 191.
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 5, Page 11 of 12
I.P.U.C. No.27 Original Sheet 177
AVISTA CORPORATION
d/b/a Avista Utilities
Issued January 29, 2021 Effective September 1, 2022
Issued by Avista Corporation
By Patrick Ehrbar, Director of Regulatory Affairs
SCHEDULE 177
DEFERRED DEPRECIATION CREDIT - IDAHO
APPLICABLE:
To Customers in the State of Idaho where the Company has natural
gas service available. This Temporary Deferred Depreciation Credit shall be applicable to
all retail customers taking service under Schedules 101, 111, 112, and 146.
This rate credit is the result of the Company deferring the benefit of reduced natural gas
depreciation expense recorded on its books of record, but not yet reflected in customers
rates.
MONTHLY RATE:
The energy charges of the individual rate schedules are to be decreased by the following
amounts:
Schedule 101 $0.01149 per Therm
Schedule 111 & 112 $0.00594 per Therm
Schedule 146 $0.00268 per Therm
TERM:
The Deferred Depreciation Credit will be in effect for a one-year period from September
1, 2022 through August 31, 2023. Any residual balance at the end of the one-year 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 158.
Exhibit No. 18 Case No. AVU-G-21-01 J. Miller, Avista
Schedule 5, Page 12 of 12
DAVID J. MEYER VICE PRESIDENT AND CHIEF COUNSEL FOR
REGULATORY & GOVERNMENTAL AFFAIRS
AVISTA CORPORATION P.O. BOX 3727 1411 EAST MISSION AVENUE SPOKANE, WASHINGTON 99220-3727
TELEPHONE: [phone] FACSIMILE: [phone] [e-mail]

BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION

IN THE MATTER OF THE APPLICATION ) CASE NO. AVU-E-21-01 OF AVISTA CORPORATION FOR THE ) CASE NO. AVU-G-21-01
AUTHORITY TO INCREASE ITS RATES ) AND CHARGES FOR ELECTRIC AND ) NATURAL GAS SERVICE TO ELECTRIC ) EXHIBIT NO. 18 AND NATURAL GAS CUSTOMERS IN THE )
STATE OF IDAHO ) JOSEPH D. MILLER

FOR AVISTA CORPORATION

(ELECTRIC AND NATURAL GAS)
Effective September 1, 2021
Base Tariff Base Tariff Base Total Billed Sch 176 Total Billed Percent
Distribution Revenue Proposed Distribution Revenue Tarif Revenue Total Tax Revenue Increase on
Line Type of Schedule Under Present General Under Proposed Percent at Present General Rate at Proposed Billed GRC
No.Service Number Rates (1)Increase Rates Increase Rates (2)Increase Credit Rates (2)Revenue
(a) (b) (c) (d) (e)(f)(g) (h) (i) (j)(k)
1 General Service 101 $35,787 $42 $35,829 0.1%$50,222 $42 -$1,002 $49,262 -1.9%
2 Large General Service 111/112 $7,395 $9 $7,404 0.1%$12,909 $9 -$207 $12,711 -1.5%
3 Interruptible Service 131/132 $0 $0 $0 0.0%$0 $0 $0 $0 0.0%
4 Transportation Service 146 $478 $1 $479 0.1%$478 $1 -$13 $465 -2.7%
5 Special Contracts 148 $110 $0 $110 0.0%$110 $0 $0 $110 0.0%
6 Total $43,770 $52 $43,822 0.1%$63,718 $52 -$1,223 $62,548 -1.8%
(1) Excludes Schedule 150 - Purchased Gas Cost Adjustment, Schedule 155 - Gas Rate Adjustment, Schedule 175 - Decoupling & Schedule 191 - DSM
Schedule 172, Permanent Federal Tax Rate Credit, is proposed to be incorporated into base rates in this proceeding .
Effective September 1, 2022
Base Tariff Base Tariff Base Total Billed Sch 177 Total Billed Percent
Distribution Revenue Proposed Distribution Revenue Tarif Revenue Total Deferred Revenue Increase on
Line Type of Schedule Under Present General Under Proposed Percent at Present General Depreciatio at Proposed Billed GRC
No.Service Number Rates (1)Increase Rates Increase Rates (2)Increase Credit Rates (2)Revenue
(a) (b) (c) (d) (e)(f)(g) (h) (i) (j)(k)
1 General Service 101 $35,829 $778 $36,607 2.2%$49,262 $778 -$735 $49,305 0.1%
2 Large General Service 111/112 $7,404 $161 $7,565 2.2%$12,711 $161 -$152 $12,720 0.1%
3 Interruptible Service 131/132 $0 $0 $0 0.0%$0 $0 $0 $0 0.0%
4 Transportation Service 146 $479 $11 $490 2.2%$465 $11 -$10 $466 0.2%
5 Special Contracts 148 $110 $0 $110 0.0%$110 $0 $0 $110 0.0%
6 Total $43,822 $950 $44,772 2.2%$62,548 $950 -$896 $62,601 0.1%
(1) Excludes Schedule 150 - Purchased Gas Cost Adjustment, Schedule 155 - Gas Rate Adjustment, Schedule 175 - Decoupling & Schedule 191 - DSM
(2) Includes Schedule 150 - Purchased Gas Cost Adjustment, Schedule 155 - Gas Rate Adjustment, Schedule 175 - Decoupling, & Schedule 191 - DSM
(2) Includes Schedule 150 - Purchased Gas Cost Adjustment, Schedule 155 - Gas Rate Adjustment, Schedule 172 - Permanent Federal Tax Rate Credit, Schedule 175 - Decoupling, &
Schedule 191 - DSM
AVISTA UTILITIES
IDAHO GAS, CASE NO. AVU-G-21-01
PROPOSED INCREASE BY SERVICE SCHEDULE
12 MONTHS ENDED DECEMBER 31, 2019
(000s of Dollars)
Exhibit No. 18
Case No. AVU-G-21-01
J. Miller, Avista
Schedule 6, Page 1 of 4
Present Rates Base Proposed Rates
Present Present Tariff Proposed Proposed
Line Type of Sch. Rate of Relative Proposed Rate of Relative
No.Service Number Return ROR Increase Return ROR
(a) (b) (c)(d)(e) (f)(g)
1 General Service 101 6.59%0.90 0.1% 6.61%0.90
2 Large General Service 111/112 10.55%1.45 0.1% 10.57%1.44
3 Interruptible Service 131/132 0.00%0.00 0.0% 0.00%1.00
4 Transportation Service 146 12.71%1.74 0.1% 12.72%1.74
5 Total 7.30%1.00 0.1% 7.31%1.00
AVISTA UTILITIES
IDAHO GAS, CASE NO. AVU-G-21-01
PRESENT & PROPOSED RATES OF RETURN BY RATE SCHEDULE
12 MONTHS ENDED DECEMBER 31, 2019
Exhibit No. 18
Case No. AVU-G-21-01
J. Miller, Avista
Schedule 6, Page 2 of 4
Proposed
Present Base Present General Schedule 172 Schedule 176 Proposed Base
Distribution Present Revised Billing Present Rate Tax reform Tax Credit Billing Distribution
Type of Service Rate (2)Schedule 172 Base Rates Rate Adj.(1)Billing Rate Inc/(Decr)Change Change Rate Rate
(a) (b) (c) (d) (e) (f)(g) (h) (i) (j) (k)
General Service - Schedule 101
Basic Charge $6.00 $6.00 $0.00 $6.00 $6.00
Usage Charge:
All therms $0.50087 ($0.03630) $0.46457 $0.22569 $0.69026 ($0.03564) $0.03630 ($0.01567) $0.67525 $0.46523
Large General Service - Schedule 111
Usage Charge:
First 200 therms $0.53090 ($0.01897) $0.51193 $0.21825 $0.73018 $0.00065 $0.01897 ($0.00811) $0.74169 $0.53155
200 - 1,000 therms $0.32402 ($0.01897) $0.30505 $0.21825 $0.52330 ($0.01859) $0.01897 ($0.00811) $0.51557 $0.30543
1,000 - 10,000 therms $0.24117 ($0.01897) $0.22220 $0.21825 $0.44045 ($0.01869) $0.01897 ($0.00811) $0.43262 $0.22248
All over 10,000 therms $0.18639 ($0.01897) $0.16742 $0.21825 $0.38567 ($0.01876) $0.01897 ($0.00811) $0.37777 $0.16763
Minimum Charge:
per month $106.18 $106.18 $0.13 $106.31 $106.31
per therm $0.00000 ($0.01897) ($0.01897) $0.21825 $0.19928 $0.01897 ($0.00811) $0.21014 $0.00000
Interruptible Service - Schedule 131
Usage Charge:
All Therms $0.22609 ($0.01897) $0.20712 $0.17261 $0.37973 ($0.01872) $0.01897 $0.37998 $0.20737
Transportation Service - Schedule 146
Basic Charge $250.00 $250.00 $250.00 $250.00
Usage Charge:
All Therms $0.13441 ($0.00897) $0.12544 $0.12544 ($0.00878) $0.00897 ($0.00365) $0.12198 $0.12563
AVISTA UTILITIES
IDAHO GAS, CASE NO. AVU-G-21-01
PRESENT AND PROPOSED RATE COMPONENTS BY SCHEDULE
Effective September 1, 2021
(1) Includes Schedule 150 - Purchased Gas Cost Adjustment, Schedule 155 - Gas Rate Adjustment, Schedule 175 - Fixed Cost Adjustment and Schedule 191 - DSM
Exhibit No. 18
Case No. AVU-G-21-01
J. Miller, Avista
Schedule 6, Page 3 of 4
Proposed
Present Base Present General Schedule 177 Proposed Base
Distribution Present Revised Billing Present Rate Depreciation Billing Distribution
Type of Service Rate Schedule 172 Base Rates Rate Adj.(1)Billing Rate Inc/(Decr)Credit Rate Rate
(a) (b) (c) (d) (e) (f)(g) (h) (i) (j)
General Service - Schedule 101
Basic Charge $6.00 $6.00 $2.00 $8.00 $8.00
Usage Charge:
All therms $0.46523 $0.00000 $0.46523 $0.21002 $0.67525 ($0.01949) ($0.01149) $0.64427 $0.44574
Large General Service - Schedule 111
Usage Charge:
First 200 therms $0.53155 $0.00000 $0.53155 $0.21014 $0.74169 ($0.00950) ($0.00594) $0.72625 $0.52205
200 - 1,000 therms $0.30543 $0.00000 $0.30543 $0.21014 $0.51557 $0.01091 ($0.00594) $0.52054 $0.31634
1,000 - 10,000 therms $0.22248 $0.00000 $0.22248 $0.21014 $0.43262 $0.00795 ($0.00594) $0.43463 $0.23043
All over 10,000 therms $0.16763 $0.00000 $0.16763 $0.21014 $0.37777 $0.00599 ($0.00594) $0.37782 $0.17362
Minimum Charge:
per month $106.31 $106.31 ($1.90) $104.41 $104.41
per therm $0.00000 $0.00000 $0.00000 $0.21014 $0.21014 ($0.00594) $0.20420 $0.00000
Interruptible Service - Schedule 131
Usage Charge:
All Therms $0.20737 $0.00000 $0.20737 $0.17261 $0.37998 $0.00451 $0.38449 $0.21188
Transportation Service - Schedule 146
Basic Charge $250.00 $250.00 $50.00 $300.00 $300.00
Usage Charge:
All Therms $0.12563 $0.00000 $0.12563 ($0.00365) $0.12198 $0.00198 ($0.00268) $0.12128 $0.12761
AVISTA UTILITIES
IDAHO GAS, CASE NO. AVU-G-21-01
PRESENT AND PROPOSED RATE COMPONENTS BY SCHEDULE
Effective September 1, 2022
(1) Includes Schedule 150 - Purchased Gas Cost Adjustment, Schedule 155 - Gas Rate Adjustment, Schedule 175 - Fixed Cost Adjustment and Schedule 191 - DSM
Exhibit No. 18
Case No. AVU-G-21-01
J. Miller, Avista
Schedule 6, Page 4 of 4