Alaskan Way Viaduct

Seattle Tunnel Machine Begins Work Again
SEATTLE (AP) — The machine digging a tunnel to replace Seattle's Alaskan Way Viaduct has resumed work.
State transportation officials said the boring machine, known as Bertha, resumed mining Tuesday after the state allowed the work to continue. Las...
State Halts Seattle Tunnel Project Over Safety Concerns
 
SEATTLE (AP) — The state has halted the digging of the new Highway 99 tunnel under downtown Seattle after a sinkhole formed along the waterfront.
Gov. Jay Inslee and the Department of Transportation said Thursday they ordered Seattle Tunnel Partners to suspend digging operations by the massive tunne…
Seattle Tunnel Machine Begins Drilling Under City Streets
SEATTLE (AP) — 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.
After being out of commission for about two years, the machine called Bertha has tunneled about 73 feet and install…
Seattle’s Tunnel-boring Machine Starts Moving Again
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.
Building a tunnel was the preferred option to replace the Alaskan Way Viaduct after it was damaged in a 2001 earthquake, but it was delayed …