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tunnel machine bertha moves 300 feet

Bertha (tunnel boring machine) - Wikipedia

Bertha was designed and manufactured by Hitachi Zosen Sakai Works of Osaka, Japan, and is the world's largest earth pressure balance tunnel boring machine, at a cutterhead diameter of 57.5 feet (17.5 m) across.

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What's in a Name?

machine nicknamed Bertha is digging ... the machine out of the tunnel to barges ... Trailing gear: More than 300 feet of

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Hard grind: The epic journey of the world's biggest tunnel ...

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 was tasked with the challenge of building a tunnel large enough to carry four lanes of motor traffic under the heart of Seattle.

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bertha tunneling machine specs - Roadheader Tunneling Machine

Tunnel machine Bertha moves 300 feet, ... Bertha tunneling machine lifted to the surface - seattlepi.com. A 2,000-ton section of the broken tunnel boring machine ...

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Washington State House Democrats » Thursday, Feb 19

Thursday, Feb 19 February 19, ... Seattle Tunnel Machine Bertha Moves Toward Access Pit ... Long-stalled Bertha crawls 6 feet toward repair pit

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Bertha (tunnel boring machine) - Revolvy

"Tunnel machine Bertha moves 300 feet, reaches 'safe haven ' ". The Seattle Times. ... Bertha (tunnel boring machine) topic. Bertha is a 57-foot-diameter ...

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17 of the Biggest Machines in the World - Interesting Engineering

17 of the Biggest Machines in the ... Bertha is the world's biggest tunnel boring machine. She dwarfs any of her competitors with a total length of 300 feet and five ...

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Tunnel Machine Bertha Moves 300 Feet, - Image Results

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Up from the Depths | ASCE

Up from the Depths. ... tunnel boring machine (TBM), dubbed Bertha—in honor of Bertha Knight Landes, Seattle's only female mayor—a beast of a machine 300 ft ...

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Inside the world's largest tunnel boring machine ...

Inside the world's largest tunnel boring machine ... but as Bertha moves forward, ... 300 ft (91.4 m) of Bertha is the trailing gear section, ...

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Gizmag goes inside the world's largest tunnel boring machine

On Saturday,the world's largest tunnel boring machine was dedicated in the city ... but as Bertha moves ... 300 ft (91.4 m) of Bertha is the trailing gear ...

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Baby Bertha? Another tunnel-boring machine will soon start ...

Baby Bertha? Another tunnel-boring machine will soon start digging Seattle. ... At 57.5-feet wide, Bertha is the world's largest ... the machine is about 300-feet long.

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Documents: Seattle tunnel builder wants $190M more | The ...

The Seattle tunnel boring machine has ... equal nearly $300 for every resident of Seattle or $27 ... as Bertha has completed just 1,025 feet of its ...

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Tunnel machine Bertha moves 300 feet, reaches 'safe haven ...

Tunnel-boring machine Bertha has advanced 300 feet in the past three weeks, reaching a maintenance stop next to the Alaskan Way Viaduct.

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Washington State House Democrats » Tuesday, March 15

Tuesday, March 15 March 15, ... Tunnel machine Bertha moves 300 feet, ... Bertha reaches planned maintenance stop — next move is under Alaskan Way Viaduct. Web.

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Bertha back to digging after crews replace 300 cutting tools ...

Bertha back to digging after crews replace 300 ... machine has just 2,500 feet left to tunnel before ... the back of Bertha the tunneling machine in ...

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Alaskan Way Viaduct - Press

Inside the tunnel there are: More than 300 cameras to monitor traffic and ... since the tunneling machine Bertha broke through into ... each 70 feet long and ...

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WSDOT: Bertha nearing breakthrough on downtown Seattle tunnel ...

The Seattle waterfront tunnel and the rear of the tunnel boring machine "Bertha" are shown during a media tour on Friday, January, 24, 2014. The tunnel boring machine, nicknamed "Bertha" by the Washington State Department of Transportation, has been stuck about 1,000 feet into its two mile dig under Seattle after it struck an old steel well casing.

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West Seattle Blog… | Highway 99 tunnel

WSDOT has just gone public with two new videos of/about the Highway 99 tunnel, ... "Today Bertha has 320 feet to go ... (Tunnel as seen from machine ...

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Bertha is expected to break through a wall soon - MyNorthwest.com

The state cautiously allowed Bertha to bore forward last month and the machine has finally reached a pivotal waypoint. The boring machine is now expected to soon break through a concrete wall at a planned stop.

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360 View of Bertha Gives Perspective as Project Nears Final ...

The sheer size of Bertha, the world's largest tunnel-boring machine at 57.5 ft in diameter can prove hard to grasp. And even as the machine moves less than two blocks away from the disassembly pit near Seattle's Space Needle, about two months away from a final stop at the end of a 1.7-mile-long bore under downtown Seattle, the owner, the ...

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The tunnel sinking Seattle, and other holiday tales | New To ...

The tunnel sinking Seattle, and other holiday ... Tagged Alaskan Way Viaduct, Bertha tunnel machine, ... grows as tunneling moves under Viaduct | New To Seattle.

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These monster machines are scary awesome - Hamilton Caster

At Hamilton Caster, one of our favorite descriptions is "heavy duty." These five machines are just that.

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Elon Musk: Can Tesla, SpaceX innovator revolutionize tunnels?

Aug 13, 2017 · Tunnel machines seem like a challenge tailor-made for Elon Musk who, ... tunnel machine companies and industry ... "As it moves through the ground it ...

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38 best Magnificent Designs images on Pinterest | Kitchen ...

Find this Pin and more on Magnificent Designs by ... The $80 million drill Big Bertha is 326 feet ... continue to fix the huge machine that moves forward the tunnel ...

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