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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 ...
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MACHINE CONTROL & AUTOMATION CAN ADD TO YOUR BOTTOM LINE
This is the fifth in a series of articles about how technology can help construction companies optimize performance across their…
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 ...
Big Bertha is set to start drilling again in November after extensive repairs, testing
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
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
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
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
After a year of slumber and almost a month after chewing her way into a 12-story repair pit, Big Bertha, the ...
PHOTOS: Fixing Bertha: How workers dug a 12-story pit to raise world’s largest tunnel boring machine from the dead
No. 8 Story in 2015 « No. 9 No. 7 » The Big Bertha saga recently received a major update: crews ...
Big Bertha’s delays have pushed back the opening of the tunnel it’s digging by 20 months…so far
Seattle's new State Route 99 tunnel is officially 20 months behind schedule, and it's all Bertha's fault. The Associated Press reports ...
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VIDEO: Watch as a massive Komatsu PC8000 mining shovel is assembled in this time-lapse
VIDEO: Entire Erques Bridge construction chronicled in beautiful time-lapse
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Cat to end track drill production, intends to sell room and pillar underground mining machine business
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