The estimated in-service date for TransWest Express LLC’s TransWest Express Transmission Project is 2021-2022, a company spokesperson told TransmissionHub on Feb. 14.
She noted that following the preparation of a comprehensive environmental impact statement, the Bureau of Land Management issued its record of decision (ROD) on the project in December 2016, with the Western Area Power Administration ROD issued in January 2017, the U.S. Forest Service ROD issued in May 2017, and the Bureau of Reclamation ROD issued in June 2017.
“With the route over the federal land determined (about two-thirds of the 730-mile route), we have been moving ahead with the work to acquire easements for the state and private land along the route, a Wyoming Industrial Siting permit, and county-level permits,” the spokesperson said.
With 3,000 MW of transmission capacity, the project has an estimated total cost of $3bn, she said.
According to the project’s website, the route for the 600-kV direct-current transmission line has a typical right of way width of 250 feet. Two substation/converter stations, about 200 acres in size, will be built at each terminating point, the site noted. Along the route, transmission structure heights may vary from 100 feet to 180 feet, depending upon structure type, terrain, span and line crossings. The span between structures may vary from 900 feet to 1,500 feet, the site added.
The project will provide the transmission infrastructure and capacity necessary to deliver about 20,000 GWh/yr of clean energy generated in Wyoming to the Desert Southwest region, which, for the purposes of the project, is Arizona, Nevada, and southern California, according to the site.
California and Desert Southwest utilities do not have a direct way to access the benefits of Wyoming’s renewable energy resources without such new transmission lines as the TransWest Express, according to the site. The project will make Wyoming’s wind-generated electricity available to utilities to serve citizens in more densely populated regions, the site noted.