Construction began last month on the second major segment of the Energy Gateway project. PacifiCorp’s Rocky Mountain Power has begun erecting towers along the Mormon Trail Road for the 100-mile long Mona-Oquirrh line in northern Utah.
The line will originate at the planned Clover substation, which will be built just south of Mona Lake in Juab County. A single-circuit 500/345-kV line will run north to the site of the future Limber substation in Tooele County. From the Limber substation, the voltage will be stepped down and a double circuit 345-kV line will be built connecting to the existing Oquirrh substation in West Jordan. The line is expected to be in service in the summer of 2013.
A double-circuit 345-kV line connecting the Limber substation with the Terminal substation in Salt Lake City has also been planned and permitted as part of this project; however, it is slated for future construction.
The Energy Gateway Transmission Expansion is a multi-year $6bn investment plan that will add approximately 2,000 miles of new transmission line across the West. Energy Gateway will help alleviate transmission constraints and address current and future growth of many kinds.
The first major segment of Energy Gateway – Populus to Terminal – was placed into service in November 2010. Outreach, siting and permitting processes continue for several other segments of the project.