Washington Utilities and Transportation Commission

Puget Sound region including King, Pierce, Snohomish, Kittitas, and surrounding counties; largest IOU in Washington serving ~1.1 million electric and ~800,000 gas customers

PSE filed a major electric and gas rate case in 2024 seeking substantial revenue increases tied to grid hardening and wildfire mitigation investments; UTC approved a partial settlement with ongoing scrutiny of capital expenditure prudency and its Voluntary Green Power program transition commitments.

Southwest Washington including Clark, Skamania, and Klickitat counties; multistate IOU regulated in six states

PacifiCorp faces heightened UTC scrutiny following Oregon and California wildfire liability exposure; Washington docket activity has focused on cost allocation of wildfire-related expenses and the Clean Energy Transformation Act compliance pathway in its integrated resource plan.

Eastern Washington including Spokane, Stevens, and Whitman counties; also serves portions of northern Idaho

Avista received UTC approval of a 2024 electric rate increase emphasizing infrastructure modernization and gas system integrity; the commission has closely examined Avista's natural gas long-term planning given Washington's greenhouse gas reduction mandates under CETA and HB 1181.

Serves natural gas customers across multiple Washington counties including Yakima, Benton, Franklin, and coastal areas not served by PSE

Cascade faces ongoing UTC docket activity around gas system decarbonization planning and building electrification policy implications; recent rate proceedings have flagged concerns about stranded asset risk as Washington pursues aggressive carbon reduction timelines.

Rural eastern Washington counties including Spokane, Lincoln, Stevens, and Ferry counties; serves approximately 45,000 members

As a cooperative, Inland Power is subject to limited UTC jurisdiction but has engaged with state energy office proceedings on demand-side management and broadband deployment over utility infrastructure corridors in underserved rural areas.

City of Seattle and portions of adjacent jurisdictions; serves approximately 450,000 customers with primarily hydroelectric supply

Seattle City Light operates outside UTC rate jurisdiction as a municipal utility but participates in state-level proceedings on wholesale market rules, transmission access, and CETA compliance reporting; its 2025-2026 biennial rate adjustment drew significant Seattle City Council scrutiny over low-income program funding adequacy.

Key Issues

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