20260921ID_150 - Substitute - Clean.pdf

Substitute Thirty-Sixth Revision Sheet 150
Replacing
I.P.U.C. No.27 Thirty- Fifth Revision Sheet 150 150
AVISTA CORPORATION
d/b/a Avista Utilities
SCHEDULE 150
PURCHASE GAS COST ADJUSTMENT - IDAHO
APPLICABLE:
To Customers in the State of Idaho where Company has natural gas service
available.
PURPOSE:
To pass through changes in costs resulting from purchasing and transporting
natural gas, to become effective as noted below.
RATE:
(a) The retail rates of firm gas Schedules 101, 111 and 112 are to be increased
by 27.1340 per therm in all blocks of these rate schedules.
(b) The rates of interruptible Schedules 131 and 132 are to be increased by
16.6190 per therm.
(c) The rate for transportation under Schedule 146 is to be decreased by
0.0000 per therm.
WEIGHTED AVERAGE GAS COST:
The above rate changes are based on the following weighted average cost of gas
per therm as of the effective date shown below:
Demand Commodity Total
Schedules 101 10.5150 16.6190 27.1340
Schedules 111 and 112 10.5150 16.6190 27.1340
Schedules 131 and 132 0.0000 16.6190 16.6190
The above amounts include a gross revenue factor.
Demand Commodity Total
Schedules 101 10.4690 16.5470 27.0160
Schedules 111 and 112 10.4690 16.5470 27.0160
Schedules 131 and 132 0.0000 16.5470 16.5470
The above amounts do not include a gross revenue factor.
BALANCING ACCOUNT:
The Company will maintain a Purchase Gas Adjustment (PGA) Balancing Account
whereby monthly entries into this Balancing Account will be made to reflect differences
between the actual purchased gas costs collected from customers and the actual
purchased gas costs incurred by the Company. Those differences are then collected from
or refunded to customers under Schedule 155 — Gas Rate Adjustment.
Issued September 21, 2026 Effective November 1, 2026
Issued by Avista Utilities
By Patrick Ehrbar— Director of Regulatory Affairs