Washington State Department of Transportation (WSDOT) has awarded Skanska USA Civil the construction contract of the SR 99 South Holgate Street to South King Street: Stage 2 project.
The contract is part of a programme to replace the Alaskan Way Viaduct in Seattle, which was damaged in the 2001 Nisqually earthquake.
Skanska submitted a bid of US$114.6M (£79.3M) - 25% lower than WSDOT’s £105.7M estimate.
“It’s official. This summer we’ll begin work to replace almost half of the ageing and seismically vulnerable Alaskan Way Viaduct,” said WSDOT’s Secretary Paula Hammond. “This work is vital to public safety, and will also ensure that traffic, goods and services continue to move across the region.”
Due for completion in 2013, the South Holgate Street to South King Street: Stage 2 project involves replacing the southern mile of the viaduct with a new side-by-side roadway that meets current earthquake standards, has wider lanes and improves mobility for people and goods in the Seattle area.
The new roadway will connect to any future replacement of the viaduct’s central waterfront section, including the proposed bored tunnel replacement.