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big bertha tunnel machine

Alaskan Way Viaduct - Follow Bertha

Follow Bertha Thank you for following Bertha. The SR 99 tunneling machine, nicknamed Bertha, has completed her work. For the latest tunnel progress, visit our new tracker page.

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

Stuck in Seattle The Aggravating ... a deep-bore tunnel, mined by a custom-built machine that digs without tearing up ... what is plan B if this whole 99/Big Bertha ...

Tearing Down Seattle's Alaskan Way Viaduct: Lessons for ...

Tearing Down Seattle's Alaskan Way ... be torn down and replaced with a tunnel so that your iconic ... tunneling machine nick-named Big Bertha, ...

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

Apr 03, 2017 · Bertha the tunneling machine broke through a new concrete wall into a disassembly pit. At first it was hard to see the machine's arrival through clouds of dust.

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

The "Big" in Bertha's name isn't there for the catchiness. It's there because it's apt. 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 which ...

Big, Bigger, BIGGEST! 3 MASSIVE MACHINES that move!

The NASA crawler-transporters (land transport vehicles), Big Bertha (tunnel boring machine) and Bagger 293 (mining machine) are World's biggest / largest ma

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

Dec 24, 2013 · Named after one of Seattle's early mayors, the $80 million drill Big Bertha is 326 feet long, weighs 6,700 tons, and does much more than drill. John Blacksto...

Bertha's big breakthrough is here: Seattle tunnel machine ...

After mining through more than 9,000 feet of Seattle underground, and rebounding from a lengthy breakdown and repair, Bertha the tunneling machine is poised to bust through its final obstacle on Tuesday.

Bertha Finally Breaks Through In Seattle : The Two-Way : NPR

Apr 03, 2017 · Bertha Finally Breaks Through In Seattle : The Two-Way After a two-year delay for repairs, the giant tunnel-boring machine has completed its mission far beneath the city's streets.

Prosaic Pipe Stymied Seattle's Big Bertha - The New York Times

Jan 03, 2014 · SEATTLE — The unknown object buried beneath this city, big enough to stop the world's largest-diameter tunnel-boring machine in its tracks last month and tantalizing enough in its mystery to set off a cottage industry of wispy romantic speculation, turns out to be an ordinary metal pipe, tunnel ...

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.

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.

big bertha tunnel machine seattle - drilling machine for ...

Tunnel boring machine - Wikipedia. A tunnel boring machine (TBM), also known as a "mole", is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata.They may also be used for microtunneling.

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

Watch Bertha, the world's largest tunnel boring machine, emerge from beneath Seattle. by Kurt Schlosser on April 4, ... Bertha's big breakthrough is here: ...

The World's Largest Tunneling Machine Is (Finally) Getting ...

Bertha, the world's largest tunneling machine, has been stuck under downtown Seattle since it broke in December 2013. Engineers have had to concoct a massive and expensive rescue plan—essentially a whole construction project in itself. And yesterday, the Bertha's broken cutter head was finally ...

Big Bertha: Mystery object blocks Seattle's tunnel drill ...

The world's biggest tunnel boring machine, named after Seattle's first female mayor, has been brought to a halt

big bertha tunnel route|roadheader mining

The tunneling machine known as Bertha began tunneling beneath Seattle in July 2013 (photo at right: ... big bertha tunnel route sdot traffic map ...

Alaskan Way Viaduct - Tunneling

The tunneling machine known as Bertha began tunneling beneath Seattle in July 2013 (photo at right: ...

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.

Seattle's Big Bertha Tunneling Machine Is Finally Back on Track

After three years and millions of dollars in repairs, the SR99 tunneling machine in Seattle has resumed operations.

Follow Bertha's breakthrough - The WSDOT Blog

The tunneling machine Bertha will mine through the five-foot-thick concrete wall of the disassembly pit, ... Below is footage of Bertha's breakthrough, ...

Gizmag goes inside the world's largest tunnel boring machine

On Saturday,the world's largest tunnel boring machine was ... comes up against a boulder too big for ... of Bertha, a tunnel boring machine ...

Tunnel boring machine - Wikipedia

A tunnel boring machine ... The machine was named "Big Becky" in reference to the Sir Adam Beck hydroelectric dams ... Bertha completed boring the tunnel on April ...

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, Bertha weighs a gargantuan 6,700 tons and stretches 326 feet long. After getting stuck in late 2013 ...

Bertha reaches daylight - Feb. 19, 2015 - YouTube

Feb 18, 2015 · On Feb. 17, 2015, Bertha, the SR 99 tunneling machine, began mining into the southern wall of the pit crews will use to access and repair the machine. At mid...