The Alaskan Way Viaduct project is located in Seattle, Washington and includes the new State Route 99 Tunnel. This is a design-build (D/B) by the Seattle Tunnel Partners (STP) in conjunction with the Washington State Department of Transportation (WSDOT).
Alaskan Way Viaduct contractor releases plan to get Bertha drilling again
Puget Sound Business Journal » The Alaskan Way Viaduct project is [...]