By Aubrey Cohen, October 20, 2014
Seattle Tunnel Partners starts digging a pit to access and repair Bertha, the waterfront tunneling machine.
Photo: Washington State Department Of Transportation
Workers have started digging a pit to get at and fix Bertha, the
waterfront tunneling machine, the state Department of Transportation
Seattle Tunnel Partners rolled an excavator in on Friday west of the
Alaskan Way Viaduct, near Pier 48, where Bertha stopped after
overheating last December, the DOT said. The contractor plans to dig a
pit that's 80 feet wide and 120 feet deep, supported by piles.
Workers also are lowering groundwater near the pit and preparing to
install a massive crane to hoist pieces of the machine to the surface
for repair. The plan calls for repairs to start in later this fall, with
tunneling resuming next March.
People can track progress of the pit and other tunnel work via WSDOT's construction cams.