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The ULTIMATE look at Bertha’s breakthrough

WSDOT » On April 4, 2017, one of the world’s largest tunneling machines chewed through more than 1,000 tons of concrete and fiberglass to end a 1.7 mile journey underneath downtown Seattle. With a drone’s eye view, this video shows the raw power of Bertha’s breakthrough – start to finish.

By Michelle|2018-02-05T13:12:08-08:00April 6, 2017|Alaskan Way Viaduct, Design-Build, Highways, Videos, Washington|Comments Off on The ULTIMATE look at Bertha’s breakthrough

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