#99closure: Alaskan Way Viaduct is open

The Alaskan Way Viaduct is now open.

On April 29, WSDOT closed the Alaskan Way Viaduct while Bertha, the SR 99 tunneling machine, tunneled beneath the structure. After 10 days of around-the-clock tunneling, the viaduct was reopened to traffic on Sunday, May 8.

Follow Bertha's Progress

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Background information


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