Idaho Public Utilities Commission

Southern Idaho and eastern Oregon, including Boise metropolitan area and Snake River Plain

Idaho Power has pursued aggressive rate increases tied to load growth from data centers and semiconductor manufacturing in the Treasure Valley. The IPUC approved a significant general rate increase in 2024, and the utility continues to litigate cost allocation between Idaho and Oregon jurisdictions under its IPUC-approved PCA mechanism.

Northern Idaho including Coeur d'Alene, Sandpoint, and Moscow; also serves eastern Washington

Avista has pursued multi-year rate plans and decoupling mechanisms before the IPUC to manage revenue stability amid flat usage trends. Recent proceedings have focused on natural gas infrastructure costs and wildfire mitigation cost recovery in its Idaho service territory.

Southeastern Idaho, including Pocatello and surrounding Bear Lake and Caribou counties

Rocky Mountain Power's Idaho jurisdiction is a relatively small portion of its multi-state footprint, but the utility faces scrutiny over wildfire liability cost recovery and its transition away from coal generation under the Energy Vision 2020+ integrated resource plan.

Eastern Idaho including Fremont, Madison, and Teton counties near Yellowstone corridor

Fall River operates largely outside IPUC economic regulation as a cooperative but remains subject to IPUC jurisdiction for certain service quality and interconnection matters. The cooperative has invested in fiber broadband deployment leveraging its distribution infrastructure.

Natural gas distribution serving most of southern Idaho, including Boise, Twin Falls, and Pocatello

Intermountain Gas, a subsidiary of MDU Resources, recently completed a rate case resulting in updated depreciation schedules and infrastructure rider adjustments. The IPUC has been attentive to pipeline safety surcharge mechanisms and the utility's long-term gas supply portfolio given price volatility.

Municipal water service within Boise city limits and portions of Ada County

Boise municipal water operates under city authority rather than direct IPUC economic rate regulation, but remains relevant to IPUC proceedings involving groundwater rights adjudication and coordination with Idaho Department of Water Resources on the Eastern Snake Plain Aquifer management.

Key Issues

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