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Bertha


Seattle Tunnel Drone Video Has Star Wars Twist

The website GeekWire is reporting that as Seattle's Alaskan Way Viaduct sat free of cars overhead and drivers attempted to move around the city during the roadway's planned 2-week closure, a new drone video Tuesday showcased again what all the fuss is about....


Seattle's Big Tunnel Borer Gets Back to Work

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....


Sinkhole Develops as Bertha Resumes Drilling

A problem-plagued tunnel project in Seattle is once again facing troubles, this time prompting the Washington governor to call a halt to the work. The design-build project is in line to replace the elevated double-deck Alaska Viaduct on SR 99 with a bored tunnel....


Sinkhole Develops Near 'Bertha' Site

KomoNews is reporting that construction crews working on digging the waterfront tunnel have a new challenge on their hands after a sinkhole developed near the digging site. Crews had just resumed mining under the Seattle waterfront Tuesday evening when about two hours later, a sinkhole developed 35 feet north of the access pit....


Massive Drill to Return to Work in Seattle

Bloomburg is reporting that after approximately 750 days after she first broke down, Bertha, the massive drill long stuck under Seattle's waterfront, is back to work. Five stories tall and the biggest of her kind, Bertha overheated in December 2013, about a ninth of the way into digging a tunnel for an underground expressway....


While Bertha Rests, Work Continues On Seattle Tunnel

Work on the new tunnel under Seattle’s waterfront is on hold while Seattle Tunnel Partners repair damage to “Bertha,” the world’s largest-diameter tunneling machine named after Bertha Knight Landes, the first woman elected mayor of a major American city (Seattle) in 1926....


Bertha Damage Much Worse than Expected

SEATTLE (AP) - Seattle Tunnel Partners finished disassembling Bertha, the world’s largest tunnel-boring machine, on Monday and said the damage the machine sustained when it broke down in December 2013 was more extensive than previously thought, which means they have to revise their schedule for when they will resume drilling....


Seattle’s SR 99 Alaskan Way Tunnel Progresses

Crews operating a Hitachi Zosen Corporation tunnel boring machine began boring operations on July 30 on the $2 billion, 1.7 mi. (2.7 km) tunnel to replace the SR 99 Alaskan Way Viaduct (SR 99 Tunnel Project) in Seattle, Wash., and have made substantial progress since....


Big Bertha Finds … A Steel Pipe

SEATTLE (AP) — 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....


Seattle Tunnel-Boring Machine Big Bertha Still Stuck

SEATTLE (AP) — The state Department of Transportation and contractors building a highway tunnel under downtown Seattle are trying to find out what has blocked their tunnel-boring machine. The machine called Bertha ran into something two weeks and was shut down about 1,000 feet into the 1.7 mile project and 60 feet below South Jackson Street and South Main Street....


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