BRIGHTWATER CONVEYANCE TUNNEL SYSTEM
The Brightwater project was a major improvement to Seattle’s regional sewage treatment system. The project included approximately 13 miles (21km) of soft-ground tunnels. Our company successfully grouted the BT2 and BT3 tunnels with total tunnel length of 30,705 feet and over 55,000 cubic yards of cellular concrete for the King County Department of Natural Resources project.
