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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 ...
Bertha’s repairs push Seattle’s SR99 tunnel $200 million over budget. And it could get worse
Following two years of costly repairs and downtime, Bertha, the world's largest tunnel boring machine, is $223 million over budget, ...
As Bertha visits the dentist, a look at how this machine digs and builds the SR99 tunnel at the same time (VIDEO)
Bertha, the world's largest and perhaps most beleaguered tunnel boring machine, has been halted deep below the streets of Seattle once ...
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 ...
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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 ...
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 ...
The Top 15 Construction Equipment and Truck stories of 2015
The past 12 months have been fun for everyone here at Equipment World. We integrated with our sister site Better Roads, upped ...
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 ...
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