More From SR99 tunnel

Before Bertha repairs begin, archaeologists will test soil for artifacts

Before Bertha repairs begin, archaeologists will test...

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 ...

Tunnel-boring machine Big Bertha shut down for “months” due to complexity of needed repairs

Tunnel-boring machine Big Bertha shut down for...

Posted by Wayne Grayson on Feb 11, 2014

Washington State Department of Transportation officials say Big Bertha, the world's largest tunnel-boring machine, is likely out of commission for ...

Tunnel-boring machine Big Bertha moves forward 2 feet in test run to see if blockage is fully removed

Tunnel-boring machine Big Bertha moves forward 2 feet...

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 ...

Do you want some tips to stay safe on the job site?

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Here are the most recent tips we've posted:

Hauling headaches: Know your load limits when trailering equipment

One-man machines: The operator should be the only person on a wheel loader

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