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bertha the world 039 s largest tunnel-boring machine

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

The $80 million Bertha traveled 5,000 miles from Osaka, Japan where she was built by Hitachi Zosen. The owner of the tunnel-boring machine is Seattle Tunnel Partners, the contractor chose by WSDOT for the tunnel project.

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Pictured: The world's most powerful tunnel-boring machine ...

Engineers are still desperately trying to rescue the world's largest tunneling machine that is stuck under the city of Seattle. Bertha, a five story-high drilling ...

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35-Foot-Long Seattle Sinkhole Opens, Halting Bertha Tunnel ...

A Seattle sinkhole 35 feet long formed this week as contractors were using Bertha, the world's largest tunnel-boring machine, to work on the beleaguered Highway 99 ...

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Bertha breaks through: Tunnel boring machine completes 4-year ...

Dive Brief: The world's largest tunnel boring machine, dubbed Bertha, finished its $2.1 billion, four-year journey drilling a 1.75-mile path under Seattle when it ...

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Bertha The Largest Tunnel Boring Machine - YouTube

Jul 22, 2017 · On April 4, the world's largest tunnel boring machine broke through to the open air after almost four years underground. Called Bertha, the giant digger ...

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Reanimating Bertha, the world's biggest tunnel-boring machine

A worker enters the tunnel dug by Bertha, a tunnel-boring machine, that has seen major delays, last week in Seattle. (David Ryder / New York Times News Service) 2732525

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Bertha, The Giant Tunnel-Boring Machine Stuck Under Seattle ...

The world's largest tunnel-boring machine, nicknamed Bertha, has been stuck beneath Seattle for over a year amid its efforts to build a pathway for an underground highway to replace one that is currently obstructing the city's waterfront. This week, Bertha moved forward 6 feet but still requires major repairs.

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Seattle tunnel, among world's biggest, takes step toward ...

Apr 03, 2017 · Workers look on as the machine head of Bertha, the world's largest tunnel-boring machine, is lifted from an access pit for repairs in Seattle, Washington March 30, 2015.

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Bertha The World's Largest Tunnel-boring Machine - Video Results

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35-Foot-Long Seattle Sinkhole Opens, Halting Bertha Tunnel ...

A Seattle sinkhole 35 feet long formed this week as contractors were using Bertha, the world's largest tunnel-boring machine, to work on the beleaguered Highway 99 ...

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Gizmag goes inside the world's largest tunnel boring machine

"Bertha," as it's known, is the world's largest TBM and will spend the next 14 months boring a 1.7 mile (2.7 km) tunnel under the city as part of a US$3.1 billion project to replace a viaduct damaged in a 2001 earthquake.

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Big Bertha -- world's largest tunnel boring machine -- facing ...

Dec 24, 2013 · Named after one of Seattle's early mayors, the $80 million drill Big Bertha is 326 feet long, weighs 6,700 tons, and does much more than drill. John ...

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

From the dark depths beneath Seattle, Bertha the SR 99 tunnel machine headed out of the muck and into daylight on Tuesday, completing a final push in a…

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They're Finally Freeing Bertha, the Biggest Tunnel-Boring ...

They're Finally Freeing Bertha, the Biggest Tunnel-Boring Machine in the World Seattle's big machine has been stuck underground since the end of 2013

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Bertha (tunnel boring machine) - Wikipedia

Bertha is a 57-foot-diameter (17.4 m) tunnel boring machine built specifically for the Washington State Department of Transportation's (WSDOT) Alaskan Way Viaduct replacement tunnel project in Seattle. It was made by Hitachi Zosen Sakai Works in Osaka, Japan, and the machine's assembly was completed in Seattle in June 2013.

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Pictured: The world's most powerful tunnel-boring machine ...

Engineers are still desperately trying to rescue the world's largest tunneling machine that is stuck under the city of Seattle. Bertha, a five story-high drilling ...

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The world's biggest boring machine Bertha is taken out for ...

Contractors building a highway tunnel under Seattle are preparing to remove the world's largest boring machine so that it can be repaired. The gigantic drill, known ...

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Tunnel boring machine - Wikipedia

A tunnel boring machine ... An earth pressure balance TBM known as Bertha with a bore diameter ... 1,270 of 1,426 concrete tunnel rings. The world's largest hard ...

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Bertha The World's Largest Tunnel-boring Machine - Image Results

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Bertha, the world's biggest tunneling machine ... - CityMetric

Meet Bertha: Bertha is the world's largest tunnel boring machine. She weighs 7,000 tons and, at 17.5 metres tall, is roughly the height of a three storey house.

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Bertha's boo-boo: Why the world's largest tunnel boring ...

It's been two months since the world's largest tunnel boring machine stopped drilling underneath Seattle, but now Washington's Department of Transportation has a better idea of what's keeping Bertha from moving forward.

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Bertha – The World's Largest Tunnel Boring Machine - GeoPrac.net

Perhaps you've heard of Bertha, the World's Largest Tunnel Boring Machine or TBM? She's currently working her way underneath Downtown Seattle, excavating the ...

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World's biggest tunnel machine Bertha emerges from beneath ...

Bertha, the world's largest tunnel-boring machine, ends its journey today. It has spent four years traveling less than two miles to build a new car tunnel underneath ...

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

The World's Largest Tunnel-Boring Machine Must Be Saved. Bertha has stalled deep beneath Seattle, leaving the city's planned waterfront renaissance hanging in the balance.

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World's largest tunnel-boring machine finally breaks through ...

SEATTLE — The world's largest tunnel-boring machine broke through a concrete wall beneath Seattle on Tuesday to reach the end of its long, troubled...

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