Aerial View Of Alaskan Way Viaduct, Which Starts At Left Of Rail Yards, Becomes Double-Deck Viaduct Close To Coast Guard Yard Just Above Rail Yards, And Proceeds Along Shoreline Up Into Middle Of Picture.
Photo taken by Historic American Engineering Record
It was significantly damaged in the 2001 Nisqually earthquake and is at risk of collapsing in another major earthquake. In 2009--after years of debate over the design of its replacement--an agreement was reached to replace it with a bored tunnel under Downtown Seattle, which is scheduled to be complete in 2015.
Part of the viaduct on the south end was demolished in 2011 to make way for construction of the south tunnel portal, with traffic temporarily re-routed around the construction site. The rest of the viaduct will be demolished in 2016.