More From Big Bertha

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 ...

Repairs to Big Bertha will require a 12-story pit and removing the tunnel-boring machine’s cutterhead

Repairs to Big Bertha will require a 12-story pit and...

Posted by Wayne Grayson on Feb 28, 2014

Officials from the Washington State Department of Transportation have announced that in order to repair the world's largest tunnel-boring machine, ...

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 ...

VIDEO: Baby Bertha? Bechtel builds mini tunnel-boring machine using 50,000 Legos

VIDEO: Baby Bertha? Bechtel builds mini tunnel-boring...

Posted by Wayne Grayson on Feb 10, 2014

The Lego Movie, which hit theaters this past weekend, is fantastic. But we wish the folks who made it had ...

Another mystery overheats, halts tunnel-boring machine Big Bertha once more

Another mystery overheats, halts tunnel-boring machine...

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 ...

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 ...

A steel pipe is what brought Big Bertha, the world’s largest tunnel-boring machine, to a halt

A steel pipe is what brought Big Bertha, the...

Posted by Wayne Grayson on Jan 06, 2014

The mystery is solved—in part at least. After Big Bertha, the world's largest tunnel-boring machine, was brought to an abrupt halt ...

No. 6 in 2013: Big Bertha digs in before being stopped in her tracks

No. 6 in 2013: Big Bertha digs in before being stopped...

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 ...

The top 13 construction industry stories and posts of 2013

The top 13 construction industry stories and posts of...

Posted by Equipment World Staff on Dec 29, 2013

To say 2013 was a big year for us here at Equipment World would be an understatement. We've seen our online ...

Subway expansion in Delhi to set record with simultaneous use of 34 tunnel-boring machines

Subway expansion in Delhi to set record with...

Posted by Wayne Grayson on Jun 28, 2013

Seattle might have the world's largest tunnel-boring machine, but Delhi, India will soon have a record-setting host of the machines ...

Big Bertha, world’s largest tunnel-boring machine, lowered into starting position in Seattle

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

Posted by Wayne Grayson on Jun 05, 2013

With the digging of the Washington State Route 99 tunnel in Seattle scheduled to start in July, the Washington State Department of ...

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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