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big bertha tunnel borer

Bertha (tunnel boring machine) - Wikipedia

Bertha resumed tunnel boring on December 22, 2015, ... Some media have also referred to the machine as "Big Bertha". In March 2016, ...

The World's Largest Tunnel-Boring Machine Must Be Saved

You put your head down and you think big, ... The biggest tunnel-boring machine ever to get ... High pressure deep in a tunnel forces the muck up Bertha's ...

Big Bertha Tunnel Borer - Image Results

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Seattle's Big Bertha Tunneling Machine Is Finally Back on Track

We've covered the saga of the SR99 tunneling machine, better known as Bertha, since it broke down after only drilling though just 52 feet in three days of operation. Now the Seattle tunnel boring machine is finally back on track. It just broken through an access repair tunnel and has since mined 73 ...

Alaskan Way Viaduct - Follow Bertha

Follow Bertha Thank you for following Bertha. The SR 99 tunneling machine, nicknamed Bertha, has completed her work. For the latest tunnel progress, visit our new tracker page.

Big Bertha Tunnel Borer - Video Results

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Watch Bertha, the world’s largest tunnel boring machine ...

Watch Bertha, the world’s largest tunnel boring machine, emerge from beneath Seattle. by Kurt Schlosser on April 4, ... Bertha’s big breakthrough is here: ...

Big Bertha, world's largest tunnel-boring machine, arrives in ...

The “Big” in Bertha’s name isn’t there for the catchiness. It’s there because it’s apt. With a 57-foot diameter and a length of a football field, Big Bertha is the world’s largest tunnel-boring machine. She’s quite hefty too. Bertha is assembled from 41 parts, the largest of which ...

The end is near for Bertha: After nearly 2 miles in 4 years ...

“Go to Boston and try to find someone who wants to give the Big ... Workers stand on top of the tunnel-boring machine Bertha, ... (Steve Ringman / The Seattle Times ...

Under Seattle, a Big Object Blocks Bertha. What Is It? - The ...

In October, workers walked through the first rings of the highway tunnel being built under Seattle’s waterfront toward the boring machine called Bertha.

Bertha, Seattle's SR 99 Tunneling Machine, Is Finally Done ...

Bertha has broken through. After nearly four years underground, Seattle’s beleaguered boring behemoth clawed its way into daylight yesterday, leaving a 1.7-mile tunnel behind it.

Alaskan Way Viaduct - Tunneling

The tunneling machine known as Bertha began tunneling beneath Seattle in July 2013 (photo at right: ... + Bertha's tunnel route

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