Bertha, the world's largest tunneling machine, has been stuck under downtown Seattle since it broke in December 2013. Engineers have had to concoct a massive and expensive rescue plan—essentially a whole construction project in itself.
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The World's Largest EPB Shield Tunneling Machine; Bertha on Twitter; SR 99 tunneling machine - Bertha by WSDOT on Flickr; Overview from HistoryLink;
In July 2013, Bertha began digging the SR 99 tunnel beneath downtown Seattle to replace the city's Alaskan Way Viaduct.
Dec 24, 2013 · Big Bertha -- world's largest tunnel boring machine ... Bye-Bye to Bertha, the world's largest tunneling machine - Duration: 1:44. wsdot 24,575 views.
SEATTLE — The world's largest tunnel-boring machine broke through a concrete wall beneath Seattle on Tuesday to reach the end of its long, troubled...
Engineers are still desperately trying to rescue the world's largest tunneling machine that is stuck under the city of Seattle. Bertha, a five story-high drilling machine that was custom-built to drill the Alaska Way, ground to a halt in December after stopped by an 8-inch diameter steel pipe. But ...
Mar 11, 2013 · The world's largest diameter tunneling machine has left the port of Osaka in Japan and will arrive in Seattle later this month to begin work on replacement of the Alaskan Way Viaduct, the downtown waterfront eyesore.
Apr 03, 2017 · The best memes as world's largest tunneling machine Bertha emerges ... Crews will break down the boring machine as others prepare the inside of the ...
Feb 12, 2015 · CNN's Thom Patterson explains how engineers plan on getting Bertha, the world's largest tunnel machine, digging again in Seattle.
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Bertha, the world's largest tunnel boring machine (TBM), started digging under Seattle on Tuesday as it chewed through the north wall of the 80-ft (24.3 m) deep trench where it was assembled after being shipped in pieces from its manufacturer in Japan.
World's largest tunneling machine gets name, face, voice. 1 / 30. Back to Gallery. Want to hear what the world's largest-diameter tunneling machine has to say?
The World's Largest EPB Shield Tunneling Machine | … The world's largest shield tunneling machine was officially named Bertha on December 20, 2012.
Watch video · Engineers are still desperately trying to rescue the world's largest tunneling machine that is stuck under the city of Seattle. Bertha, ...
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After a 2001 earthquake severely damaged the double-decker section of Seattle's Route 99 highway, state and city officials decided to move the main thoroughfare underground. In July, they unleashed Bertha, the world's largest-diameter tunnel-boring machine. Built in Japan and reassembled in the ...