More From Big Bertha

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 ...

Damage to Big Bertha worse than previously thought

Damage to Big Bertha worse than previously thought

Posted by Wayne Grayson on May 26, 2015

Now that crews are well into the process of dismantling her front-end for necessary repairs, it's clear that damage to ...

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, ...

Water main damaged by Big Bertha repair excavation could cost WSDOT $4 million

Water main damaged by Big Bertha repair excavation...

Posted by Wayne Grayson on Apr 14, 2015

Four months after crews temporarily stopped excavation on a repair pit for the world's largest tunnel-boring machine due to ground sinkage, ...

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 ...

VIDEO: Big Bertha breaks through: tunnel-boring machine enters repair pit, ready for disassembly

VIDEO: Big Bertha breaks through: tunnel-boring machine...

Posted by Wayne Grayson on Mar 09, 2015

Though she remains very far from being done, Big Bertha completed a very important leg in her journey beneath Seattle ...

Big Bertha wakes from one-year nap, begins to chew her way into repair pit

Big Bertha wakes from one-year nap, begins to chew her...

Posted by Wayne Grayson on Feb 19, 2015

For the first time in more than a year, Big Bertha actually bored. According to a report from the Seattle Times, the world's largest ...

Crews reach the end of digging a 120-foot repair pit Bertha will chew her way into.

PHOTOS: Fixing Bertha: How workers dug a 12-story pit...

Posted by Wayne Grayson on Feb 11, 2015

The Big Bertha saga recently received a major update: crews with lead contractor Seattle Tunnel Partners have finished digging the ...

Big Bertha’s delays have pushed back the opening of the tunnel it’s digging by 20 months…so far

Big Bertha’s delays have pushed back the opening...

Posted by Wayne Grayson on Dec 24, 2014

Seattle's new State Route 99 tunnel is officially 20 months behind schedule, and it's all Bertha's fault. The Associated Press reports ...

Excavation stopped on Big Bertha repair pit due to major ground sinkage in area

Excavation stopped on Big Bertha repair pit due to...

Posted by Wayne Grayson on Dec 15, 2014

The latest in a long string of delays to affect tunnel-boring machine Big Bertha has far greater implications than any of the ...

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