$2B Seattle tunnel project slows; TBM advances only 24 feet in nearly a month

08/28/2013 | Seattle Times, The · KING-TV (Seattle)

Bertha, the massive machine that is digging a tunnel to replace the Alaskan Way Viaduct in Seattle, has only drilled 24 feet in about a month, and is two weeks behind schedule, say reports. It was estimated that the machine would drill 6 feet a day to start, then eventually up to 35 feet per day. The delay can be blamed on fiberglass strands that got stuck near the borer's cutting face, and a labor dispute at the site.

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Seattle Times, The · KING-TV (Seattle)

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