News

Seattle breakthrough

By and Julian Wolinsky2007-06-01T10:00:00

The first 1?3?km Central Link light rail tunnel through Beacon Hill in Seattle was completed on May 8, coming within 5?mm of engineers’ plans. A Japanese-built, laser-guided tunnel boring machine that started work in January 2006 broke through the east side of the hill as a crowd watched. Contractor Obayashi ...

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