Underground Construction

Wilson’s underground transmission team tackles unique project needs, from solid dielectric to high pressure fluid-filled cables, and has some of the most experienced personnel in the United States. Our specially fabricated cable-pulling equipment has helped install cable through 345kV from coast to coast, reliably.

Portland General Electric

Marquam - Harrison 115kV UG Project, OR
Wilson installed eight circuits of 115kV underground transmission line, including a one-mile long circuit, in the waterfront district of Portland, Oregon. Work included pulling seven circuits into a GIS basement…

BC Hydro and Power Authority

Home Payne Substation to Cathedral Square – BC Hydro 230kV SCFF Transmission Line, Canada
Wilson installed nearly six miles of underground 230kV PPLP cable. For this project, BC Hydro elected to contract directly with the cable manufacturer for both supply and installation of the…

Calpine Corporation

Los Medanos Energy Center/Delta Energy Center OSBL Electrical Underground and Overhead Transmission Lines, CA
This fast-track EPC contract included the 115kV and 230kV transmission lines interconnect for the Los Medanos Energy Center (LMEC) and Delta Energy Center (DEC). Both the LMEC (500MW) and the…

ENMAX Corporation

Substation No. 2 Upgrade Project, Canada
Wilson's upgrade of the ENMAX substation near Calgary included installation services for a 138kV cable system. The Gas Insulated Substation (GIS) building provided unique challenges due to limited space.