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 Limber 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

Transmission Project State/Location Timeline
Oquirrh to Terminal West Jordan, Utah to Salt Lake City, Utah July 2024 - November 2024
Park City to Judge Park City, Summit County May 2024 - October 2024
Spanish Fork to Mercer Mapleton, Utah to Eagle Mountain, Utah February 2023 - November 2027
Salt Lake City Foothills Salt Lake City, Utah October 2021 - December 2022