March 7, 2013 at 8:58 AM
Bertha, world’s largest tunneling machine, heading for Seattle
The Associated Press
The world’s largest-diameter tunnel boring machine is being loaded in 41 pieces onto a ship in Japan for a trip to Seattle.
The Seattle Daily Journal of Commerce reports the $80 million machine called Bertha was built at a factory in Osaka and is expected to arrive by the end of the month.
Bertha will be reassembled in a pit to tunnel a new Highway 99 route under downtown Seattle to replace the Alaskan Way Viaduct. The tunnel will have a diameter of nearly 58 feet and is scheduled to open in late 2015.
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The Today File is a general news blog featuring real-time coverage of Seattle and the Northwest. It is reported by the news staff of The Seattle Times and edited by Assistant Metro Editor Nick Provenza.
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