20251210Final_Order_No_36866.pdf

Office of the Secretary
Service Date
December 10,2025
BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF THE APPLICATION ) CASE NO. INT G-24-05
OF INTERMOUNTAIN GAS COMPANY )
FOR A DETERMINATION OF 2023 )
ENERGY EFFICIENCY EXPENSES AS ) ORDER NO. 36866
PRUDENTLY INCURRED AND )
APPROVAL OF RATE SCHEDULE EE-RS )
On December 20, 2024, Intermountain Gas Company ("Company") applied to the Idaho
Public Utilities Commission ("Commission") requesting an order: (1) designating $3,846,358 of
2023 energy efficiency expenditures as prudently incurred by the Company; (2) approving the
proposed revisions to Rate Schedule EE-RS—Residential Energy Efficiency Rebate Program; and
(3) approving the Company's use of the deemed savings methodology for evaluating the cost-
effectiveness of the Energy Efficiency Program("EE Program") ("Application").
On October 14, 2025, the Commission issued Order No. 36797, which approved the
Company's proposal to retire certain EE Program offerings; set program rebate amounts; and
directed the Company to notify the Commission concerning the timeline and results of its EE
Program audit. On November 21,2025,the Company submitted a Compliance Filing that included
a revised EE Program residential tariff, which the Company proposed to take effect on January 1,
2026, and results from the Company's EE Program internal auditing, as well as a timeline
concerning future audits. Compliance Filing at 1.
We now issue this Order accepting the Company's Compliance Filing.
COMMISSION FINDINGS AND DECISION
The Commission has jurisdiction over the Company's Application and the issues in this
case under Title 61 of the Idaho Code including Idaho Code §§ 61-301 through 303. The
Commission is empowered to investigate rates, charges,rules,regulations,practices, and contracts
of all public utilities and to determine whether they are just, reasonable, preferential,
discriminatory, or in violation of any provisions of law, and to fix the same by order. Idaho Code
§§ 61-501 through 503.
Having reviewed the record and the Company's Compliance Filing, the Commission finds
that the Company has complied with Order No. 36797, including revising Rate Schedule EE-RS
ORDER NO. 36866 1

—Residential Energy Efficiency Rebate Program and providing updates concerning the Company's
internal auditing of the EE Program.
ORDER
IT IS HEREBY ORDERED that the revised Rate Schedule EE-RS — Residential Energy
Efficiency Rebate Program attached to the Company's Compliance Filing submitted on November
21, 2025, is approved, effective January 1, 2026.
IT IS FURTHER ORDERED that the Company's reported results for its audit of the EE
Program for the period of January 1, 2025 through June 30, 2025 and its proposed timeline for
future internal auditing are accepted.
THIS IS A FINAL ORDER. Any party aggrieved by this Order or other final or
interlocutory Orders previously issued in this case may appeal to the Supreme Court of Idaho under
the Public Utilities Law and the Idaho Appellate Rules.
DONE by Order of the Idaho Public Utilities Commission at Boise, Idaho this 10t'day of
December 2025.
YRDDGE, EVENT
ENT
OHN R. HAMMOND JR., COMMISSIONER
Recused
DAYN HARDIE, COMMISSIONER
ATTEST:
LJ e, . Calderon obles
Interim Commission Secretary
1:\Legal\GAS\INTG2405_EEE\orders\INTG2405_FO_comp jl.docx
ORDER NO. 36866 2