More From Big Bertha Seattle
Posted by Wayne Grayson on Jun 18, 2014
The largest tunnel-boring machine in the world needs a bit of reinforcement against the "wet and abrasive soils" deep below ...
Posted by Wayne Grayson on Mar 25, 2014
Before workers in Seattle begin to dig a 12-story pit to make the necessary repairs to get the world's largest ...
Posted by Wayne Grayson on Feb 04, 2014
The Washington State Department of Transportation officials in charge of the world's largest tunnel-boring machine have another mystery on their ...
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