Bertha Passes 1 Mile Mark Tim Newcomb November 21, 2016 No Comments The forward-churning movement of Bertha underneath downtown Seattle has the Washington State Dept. of Transportation optimistic.Read More
Seattle Tunneling Project Steadily Moving Forward Tim Newcomb October 5, 2016 No Comments It took 80-ft-deep, dense soil for “Bertha,” the world’s largest-diameter tunnel-boring machine, to finally hit her stride.Read More
Bertha On Track with Seattle Tunnel Tim Newcomb July 25, 2016 No Comments Early 2019 has never looked so near. Or so attainable.Read More
TBM 'Bertha' Finally Rolling Along on Big Seattle Tunnel Job Tim Newcomb July 6, 2016 No Comments Bertha, the world’s largest-diameter tunnel-boring machine, sits at a low point in its 9,000-ft bore under downtown Seattle.Read More
Washington Gov. Steps In, Orders TBM Bertha To Stand Down Tim Newcomb January 20, 2016 No Comments January 2016 was supposed to signify a new beginning for “Bertha,” the world’s largest tunnel-boring machine that now sits under downtown Seattle with its 57.5-ft-dia cutterhead motionless.Read More
