Now the Seattle tunnel boring machine is finally back on track. ... Here's a video of Bertha being tested just before they put her back in operation.
Water, dirt, and a plume of smoke can be seen coming from the exit point for Bertha, the Seattle tunnel boring machine that has been digging beneath the city for nearly four years.
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.
Bertha tunnel-boring machine ... Bertha, the largest tunnel-boring machine in ... a look at how this machine digs and builds the SR99 tunnel at the same time (VIDEO)
Bertha Finally Breaks Through In ... section of the tunnel boring machine known as "Bertha ... north end of the tunnel, where a live video feed was ...
The tunneling machine known as Bertha began tunneling beneath Seattle in July 2013 (photo at right: ... + Bertha's tunnel route
Apr 03, 2017 · With a cloud of dust, Bertha — Seattle's tunnel boring machine — reached the end of her long, troubled journey, a milestone in a multibillion-dollar project to replace an aging highway hugging the city's waterfront.
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.
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.
Watch Bertha come apart in new WSDOT video. ... Bertha's not even close to ... But crews have been hard at work disassembling the 8,000-ton tunnel-boring machine ...
The new opening is sooner than originally estimated by STP. At one time, officials thought the project would be finished in 2015 but the project fell behind due to Bertha the Tunnel Boring Machine's breakdown.
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.
Live Video Breaking ... Seattle's tunnel machine Bertha breaks through ... Seattle's tunnel boring machine that's been digging beneath the city for the State ...
Bertha was designed and manufactured by Hitachi Zosen Sakai Works of Osaka, Japan, and is the world's largest earth pressure balance tunnel boring machine, at a cutterhead diameter of 57.5 feet (17.5 m) across.
Bertha completed boring the tunnel on April 4, ... "A history of the tunnel boring machine," Mining Science, p. 58, 65 ... Video on how a Tunnel Boring Machine works;
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.
Bertha, the world's largest tunnel-boring machine, completely broke through the north end of the tunnel shortly before noon Tuesday, April, 4 2017. Bertha has broken through. The world's largest tunnel-boring machine completely broke through the north end of the tunnel shortly before noon Tuesday ...
Update: WSDOT released a new drone video on Thursday (above) with additional footage and sound to replace the previous video. WSDOT says Bertha chewed through 1,000 tons of concrete before breaking through on Tuesday. When Bertha the tunneling machine busted through the end wall on Tuesday to ...
Giant tunnel-drill machine Bertha broke into daylight shortly before 11:30 a.m. Tuesday after years of delays. We covered the scene live.
As we speak (write), Bertha is boring under the Alaskan Way Viaduct. We no longer have the opportunity to watch the recovery effort because the greatest activity is happening underground. WSDOT found a fix for that. They released a video of a drone's flight through the tunnel and up to the machine ...
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.
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.
The World's Largest Tunnel-Boring Machine Must Be Saved. Bertha has stalled deep beneath Seattle, leaving the city's planned waterfront renaissance hanging in the balance.