Below is an overview of current construction activities for the Alaskan Way Viaduct Replacement Program, which includes state- and city-led projects. If you have questions regarding this work, call our hotline at 1-888-AWV-LINE (298-5463).
Last updated: Week of Jan. 30, 2012
South of downtown construction
Second SR 99 bridge
Crews continue building foundations for the new northbound SR 99 bridge, which is being built in the footprint of the demolished viaduct. Visit the South Holgate Street to South King Street project website for details.
South Spokane Street Viaduct widening
WSDOT contributed funding to this City of Seattle project to help keep traffic moving during the south end viaduct replacement. Learn about closures and alternate routes for the Spokane Street project.
Waterfront construction
SR 99 tunnel
Southbound traffic along Alaskan Way South is routed underneath the viaduct. The detour keeps traffic moving on the waterfront as the tunnel work zone expands north to South Jackson Street.
Transmission line relocation
In advance of viaduct demolition, Seattle City Light is replacing a section of electrical lines attached to the viaduct with new underground lines. A project map and construction details are available on the city's website.
North of downtown construction
SR 99 tunnel
Crews are relocating utilities near the north end of the tunnel route, east of Seattle Center, resulting in daytime parking closures and detours in the area. This work is preparation for construction of the tunnel’s north portal.
Mercer Street
The City of Seattle is creating a two-way route along Mercer Street to improve access to Fremont/Interbay and the SR 99 tunnel. Lane closures and detours are noted on the project website.