tunnel boring machine seattle

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

Crews struggled for weeks to reach the object that was blocking the boring machine, ... Seattle Tunnel Partners filed a claim with WSDOT in March asking for ...

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

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 schedule. The massive drill is part of the state Department of Transportation's multibillion-dollar ...

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.

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. And now that its job is done, workers can at last move an aging, potentially dangerous stretch of elevated highway ...

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

Reanimating Bertha, a Mechanical Behemoth Slumbering Under ...

Aug 01, 2014 · SEATTLE — Sometime this fall, a huge vertical shaft lined with 84 concrete pilings, designed to hold back the slurry that defines underground Seattle, will be finished, and a Mr. Fix-It operation unlike any other will begin. The world's biggest tunnel-boring machine, nicknamed Bertha — which ...

Seattle's big tunnel project reaches a milestone, but it's ...

Seattle's big tunnel project ... a stretch of Highway 99 that runs through north Seattle not far from the tunnel's ... 326-feet-long tunnel boring machine, ...

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

Apr 03, 2017 · Bertha, one of the world's largest tunnel boring machines, emerged north of downtown Seattle on Tuesday.

Sound Transit Northgate tunnel boring machine dedication ...

Sound Transit's tunnel boring machine is dedicated near the future Northgate light rail station. The machine is one of two that will dig 3.6 miles of

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. The story of how ...

Seattle's tunnel boring machine finishes digging a hole under ...

Apr 03, 2017 · Seattle's boring machine, Bertha, finally emerges after four years.

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 ...

Seattle viaduct demolition: When it will happen and what to ...

With Bertha the tunnel-boring machine's job complete, the Alaskan Way Viaduct replacement tunnel's construction is well underway. This means that the viaduct's days are officially numbered. The Washington State Department of Transportation (WSDOT) is in the process of putting together the plan ...

Seattle's tunnel boring machine Bertha reaches end of long ...

Apr 03, 2017 · Bertha, the machine digging a 1.75 mile tunnel under Seattle to replace a waterfront bridge with an underground roadway, had just 30 feet of mining left at the beginning of the day Tuesday.

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

Stuck in Seattle The Aggravating Adventures of a Gigantic Tunnel Drill By Karen Weise ... STP decided to buy the tunnel-­boring machine from Hitachi Zosen, ...

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.

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 city to replace a viaduct damaged in a 2001 earthquake.

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...

Seattle's tunnel-boring machine starts moving again | Q13 FOX ...

Dec 21, 2015 · SEATTLE (AP) — The tunnel-boring machine called Bertha came to life after almost two years of repair work and is set to restart its journey under Seattle.

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.

Steel pipe in the way of Seattle tunnel-boring machine Big ...

Jan 02, 2014 · SEATTLE — Experts say they've at least partially solved the mystery of what's been blocking a massive tunnel-boring machine beneath downtown Seattle for the past month: a steel pipe. The $80 million, five-story-tall machine, dubbed "Bertha," is digging a new path for State Route 99, one of the ...

The end is near for Bertha: After nearly ... - The Seattle Times

Bertha has made it to the finish line. The celebrity boring machine's arrival near Seattle Center, some 29 months late, guarantees a Highway 99 tunnel bypassing downtown.

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.

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 ...

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

Dec 24, 2013 · Named after one of Seattle's early mayors, ... Big Bertha -- world's largest tunnel boring machine -- facing big Seattle challenge CBS Evening News.