More From SR 99
Posted by Wayne Grayson on May 13, 2014
Just because Big Bertha is down for nearly a year, that doesn't mean work around the world's largest tunnel boring ...
Posted by Wayne Grayson on Jan 31, 2014
After nearly two months of downtime caused by a steel pipe stuck in her teeth, Big Bertha, the world's largest ...
Posted by Equipment World Staff on Dec 30, 2013
There's been a lot of excitement this year about the world's largest tunnel boring machine. Named "Big Bertha," she arrived ...
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