More From Bertha tunneling machine

Washington governor halts Bertha tunneling after sinkhole forms

Washington governor halts Bertha tunneling after...

Posted by Bobby Atkinson on Jan 18, 2016

Bertha didn't get back to work for long. Washington Gov. Jay Inslee has put the brakes on the massive tunnel boring machine ...

Bertha breaks through repair wall and begins tunneling soil once more (VIDEO)

Bertha breaks through repair wall and begins tunneling...

Posted by Bobby Atkinson on Jan 13, 2016

It's taken two years in repairs and delays, but Bertha has broken through her concrete repair pit. The Washington State Department of Transportation ...

VIDEO: Bertha, world’s largest tunneler, resumes digging below Seattle after 2-year delay

VIDEO: Bertha, world’s largest tunneler, resumes...

Posted by Wayne Grayson on Dec 28, 2015

Though the contractor behind the Washington state Highway 99 project said it might give crews a holiday break before resuming the ...

Bertha is nearly ready to start tunneling again (VIDEO)

Bertha is nearly ready to start tunneling again (VIDEO)

Posted by Bobby Atkinson on Dec 17, 2015

The massive tunnel-boring machine that's been sidelined in Seattle for two years could be back to boring by New Year's. The ...

Big Bertha, world’s largest tunnel-boring machine, arrives in Seattle

Big Bertha, world’s largest tunnel-boring...

Posted by Wayne Grayson on Apr 04, 2013

The "Big" in Bertha's name isn't there for the catchiness. It's there because it's apt. With a 57-foot diameter and a ...

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