USA's TransWest Express Begins Construction on Utah Terminal
Construction has begun on the Utah terminal of the 732-mile TransWest Express transmission line, which is designed to carry wind energy generated in Wyoming to the southwestern United States.
The TransWest Express project consists of a 3,000 MW HVDC segment from Sinclair, Wyoming, to Delta, Utah, and a 1,500 MW HVAC segment from Utah to southern Nevada. The project is expected to be completed in 2029.
Civil construction work at the Wyoming terminal started in 2023 and is largely complete. Preparation work is ongoing at the 100-acre Utah terminal site in Millard County, where the project will connect with the Intermountain Power Agency system. Additional construction in 2025 is planned along the transmission route in Juab and Wasatch counties in Utah, Moffat County in Colorado, and Carbon County in Wyoming.
A construction permit has been approved for a 1.55-mile, 500-kV transmission line and related facilities to connect TransWest Express to the existing Harry Allen-to-Eldorado transmission line, which is part of the California Independent System Operator system. Construction on this interconnection will not begin in 2025.
TransWest Express will interconnect with the Intermountain Power Agency in Utah, PacifiCorp in Wyoming, NV Energy in Nevada, and the California Independent System Operator in California. The transmission line will deliver wind energy generated in Wyoming to utilities and wholesale purchasers in Arizona, Nevada, and Southern California.
Approximately two-thirds of the TransWest Express route is located on federal land, primarily administered by the Bureau of Land Management. All required federal right-of-way grants and notices to proceed have been issued.
