Gateway South Transmission Line

The Gateway South transmission line extends approximately 400 miles from the Aeolus Substation in southeastern Wyoming, to the Clover Substation near Mona, Utah.  The project is part of PacifiCorp’s Energy Gateway Project, an integrated resource plan intended to create the necessary infrastructure to deliver electricity from new generating resources.  Once complete, the multi-year investment plan will add approximately 2,000 miles of new transmission lines across the West.

ESW is part of the Quanta Services team responsible for Engineering, Procurement and Construction (EPC) of the full scope of the project, which is split into three separate Elements: Element A, a 500 kV line between the Aeolus substation and Little Snake series compensation station in Wyoming; Element B, a 500 kV line between Little Snake and Coyote series compensation stations in Colorado; and Element C, a 500 kV line between Coyote series compensation station and Clover substation in Utah.

The project crosses three states, twelve BLM jurisdictions, and is subject to a variety of environmental seasonal and biological restrictions.  It will employ approximately 2,000 employees at peak, including an estimated 24 civil crews, 42 foundation/anchor crews, 4-5 wire crews, 400 steel hands, and a host of support staff.  Additionally, it entails the erection of over 1,600 structures, totaling more than 58 million pounds of steel.  The project team includes more than 15 Quanta Services Operating Companies – coordinated under Quanta Infrastructure Solutions Group – allowing for increased communication and streamlined operations.

ESW’s scope includes development and maintenance of a custom-developed and GIS-enabled Project Management Dashboard, entailing a comprehensive QA/QC and ROW tracking system.  The Dashboard will be used with all scopes of work, including ROW and access, foundations, and overhead.  Scope also includes review and evaluation of approximately 120 access roads for landslide and slope instability risk, and geological and engineering support for H-Frame and tubular steel pole foundations.

The project is currently under construction and expected to be in-service by the fall of 2024.