Tunnel boring machine technology should allow tunnel workers to excavate at an average of 50 feet a day at a diameter of 23 feet.
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The Van Cortlandt Park Valve Chamber in New York City's Third Water Tunnel,... -
Stage one of the tunnel extends south through the Bronx, into Manhattan and... -
Stage two will provide water to the lower west side of Manhattan and sections... -
Stage three involves construction of a 16-mile long section of tunnel. In... -
Tunnel boring machine technology.
