South Portal - SR 99 Tunnel Project
These photos provide an overview of work happening at the south portal of the future SR 99 tunnel through downtown Seattle, as well as work done to replace the south end of the State Route 99 Alaskan Way Viaduct, near Seattle’s stadiums and port.

South end construction began in summer 2010 and was completed in fall 2012. The new roadway connects to the remaining viaduct along Seattle’s waterfront until the SR 99 tunnel opens in 2016. Visit for more information.
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