The Alaskan Way Viaduct Replacement Program is led by WSDOT in partnership with the Federal Highway Administration, King County, the City of Seattle and the Port of Seattle. It includes more than 20 projects that will work together to reshape the SR 99 corridor.
Construction on the first project started in 2008, when crews stabilized four viaduct columns that settled following the 2001 Nisqually Earthquake. Since then, more than 15 projects have been completed, with several more in progress or set to break ground soon. The below timeline includes major accomplishments along the road to viaduct replacement.
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