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Stronger Big Bertha cutter head lowered back into its pit for tunneling

Stronger Big Bertha cutter head lowered back into its...

Posted by Bobby Atkinson on Aug 27, 2015

Big Bertha's massive cutter head is back underground after months of repairs were made to get the world's largest tunnel-boring ...

Big Bertha is set to start drilling again in November after extensive repairs, testing

Big Bertha is set to start drilling again in November...

Posted by Bobby Atkinson on Jul 21, 2015

The world's largest tunnel-boring machine is now scheduled to get back to work on November 23, nearly two years after it overheated ...

Crews begin installation of Big Bertha’s new seal system

Crews begin installation of Big Bertha’s new seal...

Posted by Wayne Grayson on Jun 16, 2015

While the rest of her massive frame waits below ground, Big Bertha has undergone the most pivotal portion of her ...

Board rules WSDOT should have given contractor more warning about pipe struck by Big Bertha before stall

Board rules WSDOT should have given contractor more...

Posted by Wayne Grayson on May 12, 2015

In regard to the drilling of the new State Route 99 tunnel below Seattle, the Washington State Department of Transportation ...

Did Seattle’s SR 99 tunnel really require Big Bertha? Indeco argues breakers are the answer

Did Seattle’s SR 99 tunnel really require Big Bertha?...

Posted by Marcia Gruver Doyle on Apr 23, 2015

  Tunnel boring machines such as Big Bertha, the 7,000-ton machine sidelined after a massive fail under the streets of Seattle, ...

PHOTOS: Big Bertha’s 2,000-ton front end lifted to the surface. How the world’s largest tunneler was raised

PHOTOS: Big Bertha’s 2,000-ton front end lifted...

Posted by Wayne Grayson on Apr 01, 2015

After a year of slumber and almost a month after chewing her way into a 12-story repair pit, Big Bertha, the ...

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 ...

NYC tunnel expansion the largest transportation project in U.S.

NYC tunnel expansion the largest transportation project...

Posted by Wayne Grayson on Feb 28, 2013

New York City is undergoing the biggest addition to its transportation system since Penn Station opened in 1910, Time reported. ...

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