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  • Seattle's Big Tunnel Borer Gets Back to Work | Construction ...

    Television News affiliate KING5 in Seattle is reporting that Bertha, the machine boring the State Route 99 tunnel under Seattle, resumed tunneling Tuesday after being shut down for more than a month due to safety concerns.

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

    The World's Largest Tunnel-Boring Machine Must Be Saved. Bertha has ... It needed to be big enough to ... her daily tunneling, I headed down to Seattle's historic ...

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  • Seattle tunnel progress a major contrast to past problems

    The progress that Bertha, Seattle's boring machine, is making is a huge relief for contractors and the state. What is going so well this time around?

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  • Photo timeline: Seattle's tunnel-boring machine Big Bertha ...

    Earlier this week, the contracting team hired to dig a tunnel to carry Highway 99 traffic in downtown Seattle reported to the Washington State Transportation Department that it will take months to fix broken seals on the world's largest tunneling machine, called "Big Bertha."

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

    Apr 03, 2017 · Seattle's tunnel boring machine Bertha ... our plan to reclaim Seattle's waterfront ... largest tunneling machine Bertha emerges from big ...

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  • What's stopping big Bertha? Seattle debates ... - NBC News

    What's stopping big Bertha? Seattle debates mysterious object obstructing tunnel machine ... The object blocking Bertha's path may be a remnant of Seattle's ...

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  • Alaskan Way Viaduct - Tunneling

    The tunneling machine known as Bertha began tunneling ... the machine's cutterhead being lowered into the launch pit near Seattle's stadiums). The machine ...

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  • Big Bertha completes Seattle tunnel dig, next phase of ...

    Apr 03, 2017 · Bertha completes Seattle tunnel dig, ... largest tunneling machine Bertha emerges from big dig. ... Seattle's tunnel boring machine Bertha reaches ...

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  • Tunnel Boring Machine Animation - YouTube

    Jan 15, 2013 · This animation shows an example of what a tunnel boring machine looks like and how it works. ... How Seattle chose the Bertha tunnel alternative ...

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  • Bertha (tunnel boring machine) - Wikipedia

    Bertha resumed tunneling on Friday, ... The name Bertha, after Seattle's first female mayor, ... Some media have also referred to the machine as "Big Bertha". ...

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  • Seattle Restarting Bertha, the Broken Tunnel Machine | Fortune

    Stuck underground for years, Seattle's Bertha tunnel boring machine will soon tremble to life once more.

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

    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.

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  • 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.

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  • Seattle tunnel machine Bertha reaches halfway point — here's ...

    The receiving pit at the north end of Seattle's SR 99 tunnel project, where Bertha the tunnel machine will break through next year. (Kurt Schlosser / GeekWire photos) The SR 99 tunneling machine has passed the halfway point on its long journey beneath Seattle, and officials stood 10 stories below ...

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  • Follow Bertha's breakthrough - The WSDOT Blog

    The tunneling machine Bertha will ... machine until it is in its final resting place inside the disassembly pit. Below is footage of Bertha's breakthrough, ...

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  • big bertha seattle tunnel - Cutting Head

    Tunneling Machine; big bertha seattle tunnel; Tunneling Machine. Products. ... To do so, Seattle's using "Big Bertha:" the biggest Tunnel Boring Machine on Earth.

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  • 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...

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  • Seattle's massive tunneling machine on move again

    Feb 18, 2015 · Seattle's massive tunnel boring machine Bertha, which had been halted for over a year, broke through the wall of the access pit on Thursday, en route to getting repairs.

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  • Seattle's Bertha Tunnel Project Plagued By Financial Woes

    Jul 21, 2016 · More than $200 million in cost overruns, lawsuits and delays continue to haunt Seattle's big dig project. The world's largest tunneling machine, nicknamed "Bertha," is now working again, but the complicated fix of an underground breakdown in 2013 has created a huge fight over blame and who pays the tab.

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  • What's Blocking Bertha, Seattle's 5-Story Tunneling Machine ...

    Dec 11, 2013 · In this photo made with a fish-eye wide-angle lens, Bertha, the massive boring machine that is drilling a two-mile tunnel under Seattle, is shown in July before work began.

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

    May 07, 2014 · At 57 feet in diameter, it's touted as the world's biggest tunneling machine. It was even given a name, Bertha. But now, after digging just over 1,000 feet, Bertha is broken down and stuck underneath Seattle's downtown waterfront.

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  • 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 Tuesday, completing a final push in a years-long effort to create space for a new highway beneath the city.

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  • Bertha, The Giant Tunnel-Boring Machine Stuck Under Seattle ...

    Bertha, The Giant Tunnel-Boring Machine Stuck Under ... The world's largest tunnel-boring machine, nicknamed Bertha, ... Seattle's ambitious urban planning efforts ...

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  • 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.

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

    Seattle's big tunnel project ... A massive tunneling machine breaks through a 5-foot-thick ... The nickname honors Bertha Landes, Seattle's first and only ...

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