Add Yahoo as a preferred source to see more of our stories on Google. SEATTLE (Reuters) - The cutter head of the world's largest-diameter tunnel-boring machine was being hoisted out of a temporary pit ...

The damaged tunnel machine’s front end is finally resting on the surface of Seattle’s waterfront, after the 4-milllion pound load spent Monday night airborne. The operation was finished around 10:30 a ...

The study of disc cutter wear in tunnel boring machines (TBMs) is fundamental to optimising both the economic and operational performance of subterranean construction projects. Disc cutter wear ...

A screen grab from the video showing workers replacing a tunnel machine cutting tool. (Via WSDOT YouTube) Next time I think about requesting a stand-up desk or I ask for the air conditioning to be ...

SEATTLE—Experts say they’ve at least partially solved the mystery of what’s been blocking a massive tunnel-boring machine beneath downtown Seattle for the past month: a steel pipe. The $80 million, ...

At the deepest reaches of a tunnel 600 feet beneath the shore of Lake Mead, workers have spent the past few weeks swapping out parts and repairing damage to the business end of a massive tunneling ...

VIRGINIA BEACH — Now that the anchor’s away, expansion work at the Chesapeake Bay Bridge-Tunnel is back at full bore. Burrowing of a new tunnel to help carry more vehicles between Virginia Beach and ...

At nearly $350 million, a project to bore a tunnel under the City of Columbus is the most expensive in the city’s history. When completed, the 4-mile tunnel should fix a major environmental problem in ...