Transmission projects

As the interstate freeways for electricity, transmission lines efficiently deliver reliable power to customers and communities. 

Our Integrated Resource Plan (IRP) identifies a need for more transmission lines to deliver electricity from new generating resources.

We are active in discussions at state and federal levels on transmission expansion in the region, and are studying and planning projects identified inside and outside of our IRP. This process includes long-range planning to ensure our transmission system integrates well with other utility systems in the Western Electricity Coordinating Council (WECC).

Gateway Central

Gateway Central includes three line segments in Utah and Idaho: Populus to Terminal, Mona to Oquirrh and Oquirrh to Terminal.

Gateway West

The Gateway West project is jointly proposed by PacifiCorp and Idaho Power to build and operate approximately 1,000 miles of new high-voltage transmission lines in Wyoming and Idaho.

Gateway South

Gateway South comprises two line segments in Wyoming and Utah: Aeolus to Mona and Sigurd to Red Butte.

West of Hemingway

This section of line covers areas of Washington and Oregon: Wallula to McNary and Boardman to Hemingway.

Other transmission projects underway

Transmission Project State/Location Timeline
Beck Street Salt Lake County, Utah September 2019 - March 2020
Naples Substation and transmission upgrade Uintah Basin, Utah April 2019 - December 2019
Sams Valley Southern Oregon 2017-2019
South Jordan to Draper Salt Lake County, Utah 2019-2020
Southeastern Idaho  Firth, Idaho Falls, Rigby and Rexburg, Idaho 2018-2021
Vantage to Pomona Heights Vantage to Selah, Washington 2018-2020