20251205Final Approved Tariffs.pdf

Ninth Revision Sheet 175 IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Canceling December 5,2025 November 1,2025
I.P.U.C. No. 27 Eighth Revision Sheet 175 Per ON36857
Commission Secretary
AVISTA CORPORATION
dba Avista Utilities
SCHEDULE 175
FIXED COST ADJUSTMENT MECHANISM — NATURAL GAS
PURPOSE:
This Schedule establishes balancing accounts and implements an annual Fixed
Cost Adjustment ("FCA") rate mechanism that separates the recovery of the
Company's Commission authorized revenues from therm sales to customers
served under the applicable natural gas service schedules.
TERM:
The term of the FCA mechanism will remain in effect through August 31, 2029.
APPLICABLE:
To Customers in the State of Idaho where the Company has natural gas service
available. This schedule shall be applicable to all retail customers taking service
under Schedules 101, 111, and 112. This Schedule does not apply to Schedules
131/132 (Interruptible Service), Schedule 146 (Transportation Service For
Customer-Owned Gas) or Schedule 148 (Special Contracts). Applicable
Customers will be segregated into two (2) distinct Rate Groups:
Group 1 — Schedule 101
Group 2 — Schedules 111 and 112
Note — the recovery of incremental revenue related to fixed production and
underground storage costs will be excluded for new natural gas customers added
after the FCA Base test year.
MONTHLY RATE:
Group 1 — $0.01737 per therm
Group 2 — $0.00677 per therm
Issued October 30, 2025 Effective November 1, 2025
Issued by Avista Corporation
By ( Patrick Ehrbar, Director of Regulatory Affairs
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Eighth Revision Sheet 175 IDAHO PUBLIC UTILITIES COMMISSION
g Approved Effective
Canceling December 5,2025 November 1,2025
I.P.U.C. No. 27 Seventh Revision Sheet Per ON 36857
Commission Secretary
AVISTA CORPORATION
dba Avista Utilities
SCHEDULE 175
FIXED COST ADJUSTMENT MECHANISM — NATURAL GAS
PURPOSE:
This Schedule establishes balancing accounts and implements an annual Fixed
Cost Adjustment ("FCA") rate mechanism that separates the recovery of the
Company's Commission authorized revenues from therm sales to customers
served under the applicable natural gas service schedules.
TERM:
The term of the FCA mechanism will remain in effect through rMaTOhv, cnv��.
APPLICABLE:
To Customers in the State of Idaho where the Company has natural gas service
available. This schedule shall be applicable to all retail customers taking service
under Schedules 101, 111, and 112. This Schedule does not apply to Schedules
131/132 (Interruptible Service), Schedule 146 (Transportation Service For
Customer-Owned Gas) or Schedule 148 (Special Contracts). Applicable
Customers will be segregated into two (2) distinct Rate Groups:
Group 1 — Schedule 101
Group 2 — Schedules 111 and 112
Note — the recovery of incremental revenue related to fixed production and
underground storage costs will be excluded for new natural gas customers added
after the FCA Base test year.
MONTHLY RATE:
Group 1 —$0.01506 per therm
Group 2 —$0.01006 per therm
Issued July 31, 2024 Effective November 1, 2024
Issued by Avista Corporation
By Patrick Ehrbar, Director of Regulatory Affairs

Ninth Revision Sheet 175 IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
Canceling December 5,2025 November 1,2025
I.P.U.C. No. 27 Eighth Revision Sheet 175 Per ON 36857
Commission Secretary
AVISTA CORPORATION
dba Avista Utilities
SCHEDULE 175
FIXED COST ADJUSTMENT MECHANISM — NATURAL GAS
PURPOSE:
This Schedule establishes balancing accounts and implements an annual Fixed
Cost Adjustment ("FCA") rate mechanism that separates the recovery of the
Company's Commission authorized revenues from therm sales to customers
served under the applicable natural gas service schedules.
TERM:
The term of the FCA mechanism will remain in effect through August 31, 2029.
APPLICABLE:
To Customers in the State of Idaho where the Company has natural gas service
available. This schedule shall be applicable to all retail customers taking service
under Schedules 101, 111, and 112. This Schedule does not apply to Schedules
131/132 (Interruptible Service), Schedule 146 (Transportation Service For
Customer-Owned Gas) or Schedule 148 (Special Contracts). Applicable
Customers will be segregated into two (2) distinct Rate Groups:
Group 1 — Schedule 101
Group 2 — Schedules 111 and 112
Note — the recovery of incremental revenue related to fixed production and
underground storage costs will be excluded for new natural gas customers added
after the FCA Base test year.
MONTHLY RATE:
Group 1 — $0.01737 per therm
Group 2 — $0.00677 per therm
Issued October 8, 2025 Effective November 1, 2025
Issued by Avista Corporation
By Patrick Ehrbar, Director of Regulatory Affairs