Tag: Bertha

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WSDOT drone video shows Seattle’s SR 99 tunnel progress

The Washington State Department of Transportation (WSDOT) released a drone video showing two miles of ongoing construction work inside Seattle’s SR 99 tunnel.

Bertha breaks through: SR 99 tunneling machine emerges near Seattle Center

Bertha’s 1.7-mile drive beneath Seattle came to a successful end Tuesday afternoon, April 4, 64 years to the day since the Alaskan Way Viaduct first opened to traffic.
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