The world’s largest tunnel-boring machine is now scheduled to get back to work on November 23, nearly two years after it overheated and stalled while digging beneath Seattle. The Seattle Times reported that the construction team handling the massive undertaking of drilling the 1.8-mile Highway 99 tunnel released the new timetable and a new completion date of March 2018—a full three years past the original projected completion before Big Bertha broke down.

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