PacifiCorp's Energy Gateway Transmission Expansion Program represents plans to build over 2,300 miles of new high-voltage transmission lines, with an estimated cost of over $8 billion, primarily in Wyoming, Utah, Idaho and Oregon. The over $8 billion estimated cost includes:
The new Energy Gateway transmission line segments are intended to: (a) address customer load growth; (b) improve system reliability; (c) reduce transmission system constraints; (d) provide access to diverse generation resources, including renewable and zero carbon resources; and (e) improve the flow of electricity throughout PacifiCorp's six-state service area. Proposed transmission line segments are evaluated to ensure optimal benefits and timing before committing to move forward with permitting and construction. Through December 31, 2021, $2.9 billion had been spent and $2.4 billion, including AFUDC, had been placed in-service.
The map shows the individual segment additions that comprise the Energy Gateway expansion. Depending on regional, third-party, and local participation, the final lines may vary somewhat. PacifiCorp is taking every reasonable step to accommodate regional transmission needs and we are committed to building Energy Gateway with our primary responsibility to provide customers with safe, reliable, and reasonably priced electrical service.
Links to Energy Gateway segment information can be found below. We update these pages as new information becomes available.
(Updated September 2023)
Segment B – Populus to Terminal
Segment C – Mona to Oquirrh
Segment C – Limber to Terminal
Segment D.1 – Windstar to Aeolus (future segment)
Segment D.2 – Aeolus to Bridger/Anticline
Segment D.3 – Bridger/Anticline to Populus (future segment)
Segment E – Populus to Hemingway (future segment)
Segment F – Aeolus to Mona/Clover
Segment G – Sigurd to Red Butte
Segment A – Wallula to McNary
Segment H – West of Hemingway