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Home My WebLink About20251029Reply Comments.pdf ' 11. RECEIVED Avista Corp. OCTOBER 29, 2025 1411 East Mission P.O. Box 3727 IDAHO PUBLIC Spokane. Washington 99220-0500 UTILITIES COMMISSION Telephone 509-489-0500 Toll Free 800-727-9170 October 29, 2025 Secretary Idaho Public Utilities Commission 11331 W. Chinden Blvd. Bldg. 8, Ste. 201-A Boise, Idaho 83714 RE: Case No. AVU-G-25-08 - Avista Utilities Proposed Modifications to Tariff Schedule 195 "Optional Renewable Natural Gas" Dear Secretary: Avista Corporation, dba Avista Utilities (Avista or the Company), provides the following reply comments in Case No. AVU-G-25-08, regarding Avista's proposed modifications to tariff Schedule 195 — Optional Renewable Natural Gas (RNG). The comments contained herein are in response to the comments filed by Commission Staff on October 29, 2025. Avista would like to thank Staff for their thorough analysis and recommended approval of the Company's proposed modifications to its Optional Renewable Natural Gas tariff schedule. The Company appreciates Staff catching the inadvertent error in the effective date which has been corrected in the accompanying clean and legislative tariff sheets. Additionally, Avista looks forward to working collaboratively with Staff to refine its annual RNG reporting. Please direct any questions regarding these comments to myself at amanda. hg eringgavistacorp.com or 509-495-7950. Sincerely, l al ,4mae'da Gu" Amanda Ghering Regulatory Affairs Manager Substitute First Revision Sheet 195 Canceling I.P.U.0 No. 28 First Revision Sheet 195 195 AVISTA CORPORATION d/b/a Avista Utilities SCHEDULE 195 OPTIONAL RENEWABLE NATURAL GAS— IDAHO AVAILABLE: To Customers in the State of Idaho where the Company has natural gas service. Customers may participate in one or more available Renewable Natural Gas program options. APPLICABLE: To all customers receiving natural gas service who agree to participate in a program option under this schedule. PROGRAM OPTIONS AND CHARGES: Low carbon energy program options available to customers will utilize the available types of Renewable natural gas. The initial program option available will be as follows: Renewable Natural Gas - One (1) block includes the environmental equivalent attributes associated with 2 therms of renewable natural gas. Each block is priced at $5.00 per block, per month. All program charges are included in the price of the block and shall be in addition to all other charges contained in the customer's applicable tariff schedule. MONTHLY BILLING: Renewable Natural Gas-The monthly billing shall be reflective of the number of Renewable Natural Gas block(s) the customer has agreed to purchase multiplied by the Charge per Block. The Monthly Billing is in addition to all other charges contained in customer's applicable tariff schedule. This schedule's Monthly Billing shall be applied to the customer's billing regardless of actual energy consumption. Issued: October 29, 2025 Effective: January 1, 2026 Issued by Avista Corporation By Patrick Ehrbar, Director of Regulatory Affairs C- )C . I.P.U.0 No. 28 Original Sheet 195—A 195-A AVISTA CORPORATION d/b/a Avista Utilities SCHEDULE 195—Continued RENEWABLE NATURAL GAS: For the purpose of this schedule, the blocks will include the environmental attributes unbundled from the actual fuel associated with Renewable Natural Gas consisting largely of methane and other hydrocarbons derived from the decomposition of organic material in landfills, wastewater treatment facilities, and anaerobic digesters. The renewable natural gas sourced shall be recognized via the M-RETs tracking system. PROGRAM ADMINISTRATION: To ensure that all costs and benefits of this program are only applied to program participants, all funds collected and spent under this schedule will be separately identified and tracked. Funds may include program costs (e.g.: program management, accounting, communications, etc.) as well as to match block subscriptions to Renewable Natural Gas environmental attribute purchases. SPECIAL TERMS AND CONDITIONS: 1. Service under this schedule is subject to the Rules and Regulations contained in this tariff. 2. Customers may apply for, or terminate participation from, this schedule anytime during the year. 3. Program may be temporarily closed or 'sold-out' to new program subscribers if there is insufficient renewable natural gas inventory available. 4. The above Monthly Billing is subject to increases as set forth in Tax Adjustment Schedule 158. Issued: September 2, 2022 Effective: September 2, 2022 Issued by Avista Corporation By Patrick Ehrbar, Director of Regulatory Affairs C- )C . Substitute First Revision Sheet 195 Canceling I.P.U.0 No. 28 First Revision 94gina4-Sheet 195 195 AVISTA CORPORATION d/b/a Avista Utilities SCHEDULE 195 OPTIONAL RENEWABLE NATURAL GAS— IDAHO AVAILABLE: To Customers in the State of Idaho where the Company has natural gas service. Customers may participate in one or more available Renewable Natural Gas program options. APPLICABLE: To all customers receiving natural gas service who agree to participate in a program option under this schedule. PROGRAM OPTIONS AND CHARGES: Low carbon energy program options available to customers will utilize the available types of Renewable natural gas. The initial program option available will be as follows: Renewable Natural Gas - One (1) block includes the environmental equivalent attributes associated with 24-.-5 therms of renewable natural gas. Each block is priced at $5.00 per block, per month. All program charges are included in the price of the block and shall be in addition to all other charges contained in the customer's applicable tariff schedule. MONTHLY BILLING: Renewable Natural Gas-The monthly billing shall be reflective of the number of Renewable Natural Gas block(s) the customer has agreed to purchase multiplied by the Charge per Block. The Monthly Billing is in addition to all other charges contained in customer's applicable tariff schedule. This schedule's Monthly Billing shall be applied to the customer's billing regardless of actual energy consumption. Issued: Somber October 22-9, 20225 Effective: �� t2� �oration By Patrick Ehrbar, Director of Regulatory Affairs ( - . I.P.U.0 No. 28 Original Sheet 195—A 195-A AVISTA CORPORATION d/b/a Avista Utilities SCHEDULE 195—Continued RENEWABLE NATURAL GAS: For the purpose of this schedule, the blocks will include the environmental attributes unbundled from the actual fuel associated with Renewable Natural Gas consisting largely of methane and other hydrocarbons derived from the decomposition of organic material in landfills, wastewater treatment facilities, and anaerobic digesters. The renewable natural gas sourced shall be recognized via the M-RETs tracking system. PROGRAM ADMINISTRATION: To ensure that all costs and benefits of this program are only applied to program participants, all funds collected and spent under this schedule will be separately identified and tracked. Funds may include program costs (e.g.: program management, accounting, communications, etc.) as well as to match block subscriptions to Renewable Natural Gas environmental attribute purchases. SPECIAL TERMS AND CONDITIONS: 1. Service under this schedule is subject to the Rules and Regulations contained in this tariff. 2. Customers may apply for, or terminate participation from, this schedule anytime during the year. 3. Program may be temporarily closed or 'sold-out' to new program subscribers if there is insufficient renewable natural gas inventory available. 4. The above Monthly Billing is subject to increases as set forth in Tax Adjustment Schedule 158. Issued: September 2, 2022 Effective: September 2, 2022 Issued by Avista Corporation By Patrick Ehrbar, Director of Regulatory Affairs C- )C .