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.

Plant Developer

Center Substation 345kV Solid Dielectric Interconnects, TX
This project included the design, procurement, and construction of the underground duct bank, cable system and GIS pits for five 345kV solid dielectric cable interconnects from the Independent Power Producer…

Entergy Services, Inc.

Mississippi River Crossing, 230kV Transmission Line, LA
This extraordinary project consisted of the installation of a 230kV transmission line underneath the Mississippi River. To accomplish the work, Entergy negotiated the bore under a separate contract and issued…

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…

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…