Seattle's unbelievable transportation megaproject ...

The tunnel-boring machine gets stuck . 2. Our plan to deal with a broken machine is inadequate ... but by a WSDOT-hired contractor. Also, Seattle Tunnel Partners, which owns Bertha, says the ...

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

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 was built ...

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. ... to show off the cutting head as the refurbishment ...

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

The owner of the tunnel-boring machine is Seattle Tunnel Partners, the contractor chose by WSDOT for the tunnel project. Bertha even has her own Twitter account and it's quite entertaining. Nice ...

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).

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 ...

Bertha (tunnel boring machine) - Wikipedia

Bertha was 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.

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

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

How did we get here? A look back on Seattle's tunnel ...

Bertha's end could be near. The world's largest tunnel-boring machine is on schedule to break into daylight this spring after a tumultuous dig under downtown Seattle that's years behind ...

Alaskan Way Viaduct - Follow Bertha

While Bertha was underground, this page tracked her progress beneath Seattle. With the machine dismantled and removed, we are now tracking tunnel progress on a new page. Find the new tunnel progress tracker here

seattle tunnel boring machine update

A diagram shows where Bertha will tunnel beneath Seattle's Alaskan Way Viaduct. ... and from the tunnel boring machine to ... week Update — Most-read ... get price Seattle tunnel machine completes its mission - Mail Online

Alaskan Way Viaduct - Follow Bertha

While Bertha was underground, this page tracked her progress beneath Seattle. With the machine dismantled and removed, we are now tracking tunnel progress on a new page. Find the new tunnel progress tracker here

Tunnel boring machine stopped by mystery object | The ...

The great Seattle mystery has been solved: The object blocking the world's largest tunnel boring machine isn't an old steamship or locomotive or alien spaceship – it's an 8-inch-diameter steel pipe.

Bertha ends her Alaskan Way voyage in Seattle - World Highways

Seattle's State Route 99 viaduct is coming down. David Arminas was on site. Bertha, the world's largest diameter earth pressure balance tunnel boring machine, with a cutterhead diameter of 17.5m, is no more. Her 2.7km journey underneath the waterfront area of Seattle finished on April 4 and the power went off for the last time on an extraordinary TBM that had finally completed an extraordinary ...

Gizmag goes inside the world's largest tunnel boring machine

On Saturday,the world's largest tunnel boring machine was dedicated in the city of Seattle. "Bertha," as it's known, will spend the next 14 months boring a 1.7 mile (2.7 km) tunnel under the ...

Video: Amazing look at the dark, dirty and difficult work ...

GeekWire 200; Seattle Engineering Centers ... dirty and difficult work of changing Seattle tunnel machine's cutting tools ... A screen grab from the video showing workers replacing a tunnel ...

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. ... to show off the cutting head as the refurbishment ...

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 ...

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

Then her cutting head stops spinning. Now what? What do you do when the world's ... The biggest tunnel-boring machine ever to get stuck under Seattle. ... A white hard hat said SEATTLE TUNNEL ...

Bertha | The Seattle Times

Read more about the technical challenges and rising costs of the Highway 99 tunnel project, and the successes and travails of Bertha, the biggest-ever boring machine.

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

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

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

Then her cutting head stops spinning. Now what? What do you do when the world's ... The biggest tunnel-boring machine ever to get stuck under Seattle. ... A white hard hat said SEATTLE TUNNEL ...

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

The owner of the tunnel-boring machine is Seattle Tunnel Partners, the contractor chose by WSDOT for the tunnel project. Bertha even has her own Twitter account and it's quite entertaining. Nice ...

Bertha | The Seattle Times

Read more about the technical challenges and rising costs of the Highway 99 tunnel project, and the successes and travails of Bertha, the biggest-ever boring machine.

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. And now that ...