More From tunnel boring machine

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 ...

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 ...

Unstoppable Force, Immovable Object: Seattle’s Big Bertha halted by mystery object

Unstoppable Force, Immovable Object: Seattle’s...

Posted by Wayne Grayson on Dec 19, 2013

Has Big Bertha met her match? She has, at least for the time being. The world's largest tunnel-boring machine was recently ...

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 ...

The equipment (and cost) behind NYC’s Second...

Posted by Wayne Grayson on Jun 14, 2012

CNN Money has a really interesting piece on the $4.5 billion budget of the first mile-and-a-half segment of New York ...

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