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Rocky Mountain Power updates Sweetwater County on Gateway projects and forthcoming rate changes
Summary
Rocky Mountain Power told commissioners the Gateway South project is in service and Gateway West segments remain in permitting, described the Anticline–Shirley Basin transmission proposal and timelines, and said a companywide rate filing will raise general rates June 1 before a partial offset from the annual energy-cost adjustment on July 1.
Representatives from PacifiCorp/Rocky Mountain Power updated the Sweetwater County commissioners on long‑range transmission projects and near‑term retail rates during the May 20 meeting.
PacifiCorp representatives said Gateway South (a 500 kV transmission project) was placed into service late in 2024 and that reclamation and final monitoring work remain. They described two major Wyoming transmission initiatives under planning and permitting: the Anticline–Shirley Basin 500 kV project (approx. 152 miles, entirely in Wyoming, with routing and NEPA work ongoing) and Gateway West D‑3 (a…
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