More From Big Bertha

VIDEO: A drone’s-eye view of Bertha’s work inside Washington’s SR 99 tunnel

VIDEO: A drone’s-eye view of Bertha’s work...

Posted by Wayne Grayson on May 09, 2016

Bertha, the largest tunnel-boring machine in the world, is back at work once again and tunneling below the Alaskan Way ...

Bertha will soon begin digging below the viaduct its path will replace

Bertha will soon begin digging below the viaduct its...

Posted by Wayne Grayson on Apr 27, 2016

The world's largest tunneling machine will soon begin its dig beneath the Alaskan Way Viaduct in Seattle, its first activity ...

Bertha back to drilling after suspension is “conditionally lifted”

Bertha back to drilling after suspension is...

Posted by Bobby Atkinson on Feb 26, 2016

Bertha hasn't been blessed with the best of luck in Seattle, but the world's largest tunnel boring machine is back to drilling ...

Washington governor halts Bertha tunneling after sinkhole forms

Washington governor halts Bertha tunneling after...

Posted by Bobby Atkinson on Jan 18, 2016

Bertha didn't get back to work for long. Washington Gov. Jay Inslee has put the brakes on the massive tunnel boring machine ...

Bertha breaks through repair wall and begins tunneling soil once more (VIDEO)

Bertha breaks through repair wall and begins tunneling...

Posted by Bobby Atkinson on Jan 13, 2016

It's taken two years in repairs and delays, but Bertha has broken through her concrete repair pit. The Washington State Department of Transportation ...

VIDEO: Bertha, world’s largest tunneler, resumes digging below Seattle after 2-year delay

VIDEO: Bertha, world’s largest tunneler, resumes...

Posted by Wayne Grayson on Dec 28, 2015

Though the contractor behind the Washington state Highway 99 project said it might give crews a holiday break before resuming the ...

Bertha is nearly ready to start tunneling again (VIDEO)

Bertha is nearly ready to start tunneling again (VIDEO)

Posted by Bobby Atkinson on Dec 17, 2015

The massive tunnel-boring machine that's been sidelined in Seattle for two years could be back to boring by New Year's. The ...

Bertha delayed again; won’t restart drilling until late December

Bertha delayed again; won’t restart drilling...

Posted by Bobby Atkinson on Oct 26, 2015

The Seattle Tunnel Partners have once again delayed the restart of drilling for the State Route 99 tunnel, with Bertha not expected ...

Crews prepare soil for Bertha to begin tunneling again

Crews prepare soil for Bertha to begin tunneling again

Posted by Bobby Atkinson on Oct 16, 2015

One of the last steps to getting Big Bertha back to boring beneath Seattle is underway. The Washington State Department of ...

Click through to see each step of Bertha's extensive repair process.

PHOTOS > Big Bertha gets her head together: How to...

Posted by Wayne Grayson on Sep 29, 2015

With the final repairs having been made earlier this summer and Big Bertha finally picked back together underground, Washington State ...

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 ...

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