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big bertha big bertha tunnel boring machine updates

Contractor ordered to pay Washington state $57M over

The verdict, reached Friday against the tunnel contractors in Thurston County Superior Court in Olympia, represents the entire amount the state requested at trial. The Dec. 6, 2013, stall of...

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Big Bertha: Mystery object blocks Seattle's tunnel drill

Dec 17, 2013 The $80 million machine, nicknamed Big Bertha, stands five stories tall. It arrived in Seattle earlier this year with much fanfare and high hopes. Gregory Hauser is the deputy project manager for...

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Big Bertha's Two-Mile Subterranean Journey Is Almost Over

Jan 26, 2017 More than 150 feet below the streets of Seattle, Bertha presses on, boring a 57.5-foot diameter tunnel underneath the city. The largest tunnel boring machine (TBM) in the world when it

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What happens next for Bertha, Seattle's waterfront tunnel

Apr 03, 2017 Update: Tuesday is finally the day the massive tunnel boring machine, Bertha, is expected to emerge from under downtown Seattle, KIRO Radio reports. For the machine’s

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Seattle's Big Bertha Tunneling Machine Is Finally Back on

Jan 08, 2016 Now the Seattle tunnel boring machine is finally back on track. It just broken through an access repair tunnel and has since mined 73 feet since December 22. Five stories tall and the biggest

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Mystery of Seattle's Tunnel Borer Blockage Solved

When it got stuck, big Bertha was only about 1,000 feet into a two-mile-long boring journey under Seattle for the tunnel that will replace the city's waterfront viaduct a necessity after

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What happens to Bertha after digging is done? We’ve got

At 57 feet, 4 inches in diameter, Bertha was the world’s largest boring machine when it began tunneling beneath Seattle. But a German company manufactured a slightly larger machine to tunnel

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

Apr 04, 2017 After 4 Years, Seattle's Giant Tunneling Machine Finally Breaks Through After four years underground, Bertha reaches daylight. Bertha has broken through. After nearly four years underground,...

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Big Bertha: Mystery object blocks Seattle's tunnel drill

Dec 17, 2013 Deep beneath Seattle, something has brought the world's biggest tunnel boring machine to an abrupt halt. The tunnel is currently just 1,000 feet but planned to be almost 10,000 feet long.

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Seattle's tunnel machine Bertha breaks through nearly 4

Seattle's tunnel boring machine that's been digging beneath the city for the State Route 99 tunnel reached the end of its 1.75-mile journey Tuesday, nearly four years after it embarked on the job.

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Mystery of Seattle's Tunnel Borer Blockage Solved

When it got stuck, big Bertha was only about 1,000 feet into a two-mile-long boring journey under Seattle for the tunnel that will replace the city's waterfront viaduct a necessity after

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Another mystery overheats, halts tunnel-boring machine Big

Tunnel-boring machine Big Bertha has completed 1,000 feet of the tunnel. The Washington State Department of Transportation officials in charge of the world’s largest tunnel-boring machine have

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big bertha tunnel progress Oblik

Tracking Progress Latest tunnel progress. June 15, 2018 update Tunneling is complete and in March 2018 crews finished building the roadways inside the tunnel. In late spring 2018 installation wrapped up on the tunnel's 16 electrical rooms and the many sys Bertha (tunnel boring machine) big bertha tunnel progress Cutting Head

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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

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Meet Big Bertha, The World’s Largest Tunnel Boring Machine

Big Bertha was manufactured and supplied by the Hitachi Zosen Corporation to Seattle Tunnel partners for the SR 99 tunneling project. It measures 57.2 feet (17.5 m) in diameter, which makes it the largest tunnel boring machine in history.

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Who Killed Bertha? Why the Seattle Tunnel Disaster Isn't

The operator drove Bertha forward by manipulating 56 hydraulic rams braced against the concrete tunnel rings behind the machine and pushed the front of the boring machine into the face of the tunnel so its 23 750-horsepower motors could turn those cutters with just the right amount of pressure to scrape away at the face of the tunnel.

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What Blocked Seattle Tunnel: A Lowly Pipe

Jan 06, 2014 The mystery underground object that had been blocking the giant Big Bertha tunnel boring machine under Seattle turns out to have been something pretty boring: An 8-inch diameter...

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Big Bertha Lawsuits—Hitachi Zosen Weighs In ACS Lawyers

Jan 17, 2018 In a recent article published by Seattle Business Magazine, the Japanese manufacturer of the much-maligned tunnel machine (nicknamed “Bertha”) provided its version of events and its position to the public. The interview took place after executives from Hitachi Zosen were not invited to the ceremony celebrating Bertha’s breakthrough at the end of its two-mile journey []

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Big Bertha Is Digging Seattle's Massive Underground Freeway

To do so, Seattle's using "Big Bertha:" the biggest Tunnel Boring Machine on Earth. Advertisement Built for the dig by Hitachi in Osaka Japan, the $80,000,000 Big Bertha measures 57 feet in

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Big Bertha, world’s largest tunnel-boring machine, arrives

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

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Big Bertha world’s largest tunnel boring machine

Big Bertha world’s largest tunnel boring machine facing big Seattle challenge Named after one of Seattle’s early mayors, the $80 million drill Big Bertha is 326 feet long, weighs 6,700

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Bertha completes Seattle tunnel dig, next phase of

SEATTLE -- Bertha is done digging. After four years of moving -- and sitting broken for a while -- underneath downtown Seattle, the world's largest tunnel-boring machine on Tuesday reached the end

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Big Bertha: Mystery object blocks Seattle's tunnel drill

Dec 17, 2013 Deep beneath Seattle, something has brought the world's biggest tunnel boring machine to an abrupt halt. The tunnel is currently just 1,000 feet but planned to

More

Big Bertha world’s largest tunnel boring machine

Dec 25, 2013 Big Bertha world’s largest tunnel boring machine facing big Seattle challenge Named after one of Seattle’s early mayors, the $80 million drill Big Bertha is 326 feet long, weighs 6,700

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Goodbye Bertha: Final piece of the tunneling machine

Aug 23, 2017 Bertha broke through into the disassembly pit on April 4, 2017, and shortly thereafter built the tunnel’s final ring. Though the machine’s tunneling and ring-building work was complete, crews couldn’t complete roadway construction at the north portal until it was removed.

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Bertha completes Seattle tunnel dig, next phase of

SEATTLE -- Bertha is done digging. After four years of moving -- and sitting broken for a while -- underneath downtown Seattle, the world's largest tunnel-boring machine on Tuesday reached the end

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Seattle's tunnel machine Bertha breaks through nearly 4

Seattle's tunnel boring machine that's been digging beneath the city for the State Route 99 tunnel reached the end of its 1.75-mile journey Tuesday, nearly four years after it embarked on the job.

More

big bertha tunnel progress Oblik

Tracking Progress Latest tunnel progress. June 15, 2018 update Tunneling is complete and in March 2018 crews finished building the roadways inside the tunnel. In late spring 2018 installation wrapped up on the tunnel's 16 electrical rooms and the many sys Bertha (tunnel boring machine) big bertha tunnel progress Cutting Head

More

Mystery of Seattle's Tunnel Borer Blockage Solved

When it got stuck, big Bertha was only about 1,000 feet into a two-mile-long boring journey under Seattle for the tunnel that will replace the city's waterfront viaduct a necessity after

More

WSDOT: Contractor knew about steel pipe in Bertha's path

Jul 27, 2017 Seattle Tunnel Partners (STP) knew an 8-inch steel pipe was in Bertha’s path two years before the tunnel boring machine chewed through it, according to a new suit filed by Washington state.

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Big Bertha Lawsuits—Hitachi Zosen Weighs In ACS Lawyers

Jan 17, 2018 In a recent article published by Seattle Business Magazine, the Japanese manufacturer of the much-maligned tunnel machine (nicknamed “Bertha”) provided its version of events and its position to the public. The interview took place after executives from Hitachi Zosen were not invited to the ceremony celebrating Bertha’s breakthrough at the end of its two-mile journey []

More

What Blocked Seattle Tunnel: A Lowly Pipe

Jan 06, 2014 The mystery underground object that had been blocking the giant Big Bertha tunnel boring machine under Seattle turns out to have been something pretty boring: An 8-inch diameter...

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Bertha Blockage Update: The Mystery Object Is A Pipe. Oh

Jan 03, 2014 The deep-tunnel boring machine tasked to dig the new State Route 99 tunnel was at least partially blocked by a steel pipe, the Washington State Department of Transportation said Friday.

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Bertha’s boo-boo: Why the world’s largest tunnel boring

Bertha’s boo-boo: Why the world’s largest tunnel boring machine is broken by Taylor Soper on February 7, 2014 at 4:06 pm February 7, 2014 at 4:09 pm Share Tweet Share Reddit Email

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Ever Wonder Why So Many Big Things Are Nicknamed 'Bertha

Dec 20, 2013 Earlier this month, a giant, five-story tunnel boring machine dubbed Bertha got stuck in Seattle. The cause of what's stopping the machine is still unknown as crews try to reach the block, but there's a facet of the story that got us wondering: Why are so many big things nicknamed "Bertha"? There doesn't appear to be a single answer to this (we sus

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The Bertha Tunnel Boring Machine Completes Seattle’s Big Dig

May 15, 2017 During this time, the Bertha tunnel boring machine’s manufacturer— Hitachi Zosen Sakai Works in Osaka, Japan—concluded that in order to repair Bertha, the machine would have to be dug out and dismantled. In December 2015, after many delays and geological complications, the Bertha tunnel boring machine’s repair was completed.

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