Steel Pipe Obstructs Bertha

January 6, 2014

The object blocking Bertha, the tunnel boring machine digging Seattle’s Highway 99 tunnel, was found to be an 8-inch diameter, 119-foot steel well casing, according to the Seattle Times

The machine has been stopped since Dec. 6. Crews dewatered the site to get a better look at the object, which became partially visible on Jan. 2.

According to the Times, the Washington Department of Transportation installed the pipe in 2002 to measure groundwater for the Alaskan Way Viaduct replacement project.

The cost and timeline for repair, as well as the extent of the damage to the machine, are unknown. 

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Source: The Seattle Times