Idaho Power Generator Interconnection O&M Charges Update

ORDER NO. 36972 1 Office of the Secretary Service Date March 19, 2026 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION IN THE MATTER OF THE APPLICATION OF IDAHO POWER COMPANY FOR AUTHORITY TO UPDATE ITS OPERATION AND MAINTENANCE CHARGES APPLICABLE TO SCHEDULE 72, GENERATOR INTERCONNECTIONS TO PURPA QUALIFYING FACILITY SELLERS ) ) ) ) ) ) ) ) CASE NO. IPC-E-25-22 ORDER NO. 36972 On May 8, 2025, Idaho Power Company (“Company”), applied to the Idaho Public Utilities Commission (“Commission”) requesting authority to update its operation and maintenance (“O&M”) charges applicable to Schedule 72, generator interconnections to Public Utility Regulatory Policies Act qualifying facility sellers effective January 1, 2026 (“Application”). On December 31, 2025, the Commission issued Order No. 36894 approving the Company’s proposed monthly Schedule 72 O&M charges as amended by the Errata and Corrected Pages to Application and Direct Testimony of Riley Mahoney, with an effective date of January 1, 2026. The Order also required the Company to modify Schedule 72 to reflect that the transmission O&M charge applies to transmission lines of 138 kilovolt and above as of December 31, 2024. On February 27, 2026, the Company filed a compliance filing to meet this requirement without updating the transmission O&M charge in Schedule 72, because the resulting rate is the same as that approved under the prior methodology. At the Commission’s Decision Meeting on March 12, 2026, Commission Staff presented a Decision Memo indicating it had reviewed the compliance filing and confirmed the Company’s position regarding the transmission O&M charge. The Commission now issues this Order approving the Company’s compliance filing submitted on February 27, 2026. COMMISSION FINDINGS AND DECISION The Commission has jurisdiction over this matter under Idaho Code §§ 61-502 and 61- 503. The Commission is empowered to investigate rates, charges, rules, regulations, practices, and contracts of public utilities and to determine whether they are just, reasonable, preferential, discriminatory, or in violation of any provision of law, and to fix the same by order. Idaho Code §§ 61-502 and 61-503.

ORDER NO. 36972 2 Having reviewed the Company’s compliance filing, we find that because adherence to our Order No. 36894 directives results in a weighted-average transmission O&M charge equal to the current charge approved using the prior methodology, Schedule 72 does not require revision. ORDER IT IS HEREBY ORDERED that the Company’s compliance filing of February 27, 2026, is approved. THIS IS A FINAL ORDER. Any person interested in this Order may petition for reconsideration within twenty-one (21) days of the service date upon this Order regarding any matter decided in this Order. Within seven (7) days after any person has petitioned for reconsideration, any other person may cross-petition for reconsideration. Idaho Code §§ 61-626. DONE by order of the Idaho Public Utilities Commission at Boise, Idaho this 19 th day of March 2026. __________________________________________ EDWARD LODGE, PRESIDENT __________________________________________ JOHN R. HAMMOND JR., COMMISSIONER __________________________________________ DAYN HARDIE, COMMISSIONER ATTEST: Monica Barrios-Sanchez Commission Secretary I:\Legal\ELECTRIC\IPC-E-25-22Gen IC\orders\IPCE2522comp2_jl.docx