America's Biggest Tunnel-Boring Machine Is Stuck Beneath Seattle

Bertha is part of a $3.1 billion plan to replace Seattle's aging Alaskan Way Viaduct with a bored tunnel, and the $80 million machine was going gangbusters at first, churning 30 feet per day beginning in July 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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What Could Possibly Go Wrong - The Stranger, Seattle's Only ...

So what could possibly go wrong? ... The tunnel-boring machine gets stuck. ... Seattle's tunnel will go about 120 feet deep and will go below the water table near ...

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Why is Bertha stuck? WSDOT's 5 levels of tunnel-drilling hell

What exactly went wrong with Seattle's tunnel boring machine? Five different scenarios WSDOT may face this week. The world's largest tunnel machine, Bertha, is stuck 60 feet beneath Downtown Seattle. The tunnel contractor has drilled down, pumped out and pressurized a gap in front of the machine and ...

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Alaskan Way Viaduct replacement tunnel - Wikipedia

The Alaskan Way Viaduct replacement tunnel is a bored road tunnel that is ... the tunnel boring machine broke through to the ... Seattle Tunnel Partners are ...

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Fly Through the Massive Tunnel They're Carving Under Seattle

Life has not been entirely kind to Bertha, the largest tunnel boring machine in all of North America. About two years ago, the machine, which measures 57 feet tall and 325 feet long, started excavating a two-mile tunnel under downtown Seattle. Seven months later, it ground to a halt, stuck. It had ...

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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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Alaskan Way Viaduct - Tunneling

Once the tunnel opens, the viaduct will be taken down to clear the way for new public space along Seattle's downtown waterfront. The tunneling machine known as Bertha began tunneling beneath Seattle in July 2013 (photo at right: the machine's cutterhead being lowered into the launch pit near Seattle's stadiums).

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Seattle's long-broken tunnel-boring machine set to resume Nov ...

It was stuck for more than a year ... the world's largest tunnel-boring machine, ... project contractor Seattle Tunnel Partners said it hoped to have ...

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Seattle Tunnel-Boring Machine Big Bertha Still Stuck ...

SEATTLE (AP) — The state Department of Transportation and contractors building a highway tunnel under downtown Seattle are trying to find out what has blocked their tunnel-boring machine.

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Seattle Tunnel Boring Machine -- Bertha Rescue

A year ago this month, North America's largest tunnel-boring machine got stuck just 10 percent of the way through a 1.7-mile-long dig under downtown Seattle. Throughout 2014, engineers have been plugging away on an ambitious plan, outlined in a Popular Mechanics feature, to free the mechanical marvel and get the project going again.

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Seattle's Giant Drill, 'Bertha,' Is Stuck - Newser

Dec 11, 2013 · A giant drill boring beneath a section of ... Seattle's Giant Drill, 'Bertha,' Is Stuck ... "Bertha," the massive tunnel boring machine is shown ...

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Front-End Of Tunnel-Boring Machine Freed From Seattle Pit

Front-End Of Tunnel-Boring Machine Freed From Seattle Pit Engineers have removed the cutter head from the enormous tunneling machine nicknamed Bertha. The malfunctioning part had been stuck for more than a year in a highway project under the city's downtown.

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

Dec 19, 2013 · In October, workers walked through the first rings of the highway tunnel being built under Seattle's waterfront toward the boring machine called Bertha.

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Stuck In Seattle | Bloomberg Business - Business, Financial ...

Stuck in Seattle The Aggravating ... There are even pressure variations between the top and bottom of the boring machine. ... STP decided to buy the tunnel-­boring ...

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Seattle tunnel machine begins drilling after 2-year break ...

Jan 06, 2016 · Seattle's tunnel-boring machine has moved past the concrete walls that make up a repair pit and has started digging into soil about 80 feet below street-level along the city's waterfront.

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Seattle tunnel machine stuck 60 feet underground - Puget ...

Dec 08, 2013 · Seattle's tunnel-boring machine became stuck underground Friday, and still wasn't moving as of Monday.

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Seattle's unbelievable transportation megaproject fustercluck ...

The tunnel-boring machine gets stuck . 2. ... which means WSDOT Seattle Tunnel Partners has to dig a 120-foot hole to reach the machine.

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

Apr 03, 2017 · 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.

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

Bertha got stuck for a year under Seattle ... contractor Seattle Tunnel ... Crews struggled for weeks to reach the object that was blocking the boring machine, ...

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Massive tunneling machine stuck under downtown Seattle, fix ...

May 07, 2014 · A massive tunneling machine is broken down and stuck underneath Seattle's downtown waterfront -- and fixing the mess could cost taxpayers millions.

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World's biggest tunnel machine Bertha emerges from ... - Autoblog

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 Seattle.

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Alaskan Way Viaduct - Follow Bertha

The SR 99 tunneling machine, nicknamed Bertha, ... this page tracked her progress beneath Seattle. With the machine dismantled and removed, we are now tracking tunnel ...

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Seattle toasts the tunnel. Lawyers prepare for war | Crosscut

Seattle Tunnel Partners employees are seen working at what will be the exit of tunnel boring machine Bertha near 6th ... people are still going to be stuck in traffic ...

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Seattle Tunnel Boring Machine Stuck In Seattle - Video Results

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