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Bertha pushes past halfway point of tunneling for Washington’s SR 99
Bertha, the largest tunnel-boring machine in the world, has made it past the halfway point of its 9,270-foot journey beneath ...
VIDEO: A drone’s-eye view of Bertha’s work inside Washington’s SR 99 tunnel
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
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 hasn't been blessed with the best of luck in Seattle, but the world's largest tunnel boring machine is back to drilling ...
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Washington governor halts Bertha tunneling after sinkhole forms
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)
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
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)
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
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
One of the last steps to getting Big Bertha back to boring beneath Seattle is underway. The Washington State Department of ...
PHOTOS > Big Bertha gets her head together: How to repair the world’s largest tunnel machine
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
Big Bertha's massive cutter head is back underground after months of repairs were made to get the world's largest tunnel-boring ...
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