Bertha was a 57.5-foot-diameter (17.5 m) tunnel boring machine built specifically for the Washington State Department of Transportation's (WSDOT) Alaskan ...
Bertha
Tunnel boring machine
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Bertha was a 57.5-foot-diameter tunnel boring machine built specifically for the Washington State Department of Transportation's Alaskan Way Viaduct replacement tunnel project in Seattle, Washington, United States. Wikipedia
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Mar 10, 2017 · After launching in 2013, the world's largest tunnel-boring machine has less than 220 feet to go before finishing its 1.7-mile trip.
Duration: 3:00
Posted: Apr 6, 2017
Posted: Apr 6, 2017
Apr 5, 2017 · Bertha has broken through. After nearly four years underground, Seattle's beleaguered boring behemoth clawed its way into daylight yesterday ...
Duration: 2:04
Posted: Dec 25, 2013
Posted: Dec 25, 2013
May 1, 2017 · Called Bertha, the giant digger was tasked with the challenge of building a tunnel large enough to carry four lanes of motor traffic under the ...
Duration: 1:55
Posted: Apr 5, 2017
Posted: Apr 5, 2017
Apr 18, 2018 · [Bertha] was no Datsun, said a worker well call Jim, who had worked as a boring machine operator at multiple tunneling companies for several ...
Jul 20, 2020 · Bertha was a 57.5-foot-diameter (17.5 m) tunnel boring machine built specifically for the Washington State Department of Transportation's (WSDOT) ...
Duration: 3:37
Posted: Nov 3, 2016
Posted: Nov 3, 2016