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.

NV Energy

Flamingo Underground Conversion Project, NV
As the prime contractor, Wilson performed the engineering design, procurement of major materials and construction of the multifaceted project to convert an overhead transmission corridor—bisecting private property—to an underground system…

First Solar

AV Solar Ranch 1 Project, 233kV Underground Transmission Line, CA
Wilson furnished and installed 11,500 feet of transmission duct bank and seven transmission vaults. The work also included the installation of 34,500 feet of owner-provided 230kV 2500kcmil AL cable and…

ARB, Inc.

South Bay Power Station (OMPPA) Underground Transmission Line Project, CA
Wilson installed 10 miles of double circuit 230kV transmission lines comprising of two segments of the Otay - Mesa Power Loop equaling 320,000 feet of cable installation, 210 splices, and…

Bonneville Power Administration

Grand Coulee 500kV Cable Replacement Project, WA
Work included removal and disposal/recycle of 525kV self-contained fluid-filled cables, reservoirs, appurtenances and insulating oil. The 525kV cables began at the 500kV Spreader Yard and ran through two tunnels to…