Giant Tunneling Machines Finish Work in NYC - NBC New York

Giant Tunneling Machines Finish Work in NYC



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    FILE- In this July 17, 2008 file photo, a couple of sandhogs work in the East bound tunnel of the Metropolitan Transportation Authority's East Side Access project in New York.

    A fleet of massive tunneling machines that has spent 4 ½ years digging 13 miles of new train tubes deep beneath New York City finally fell silent this week after the last of the monsters finished its mission.

    On Monday, one of the 200-ton machines, nicknamed "Molina," ground to a stop beneath a Long Island Rail Road line in Queens, having carved out one of four big new tunnels that will allow the commuter railroad's trains to connect to Grand Central Terminal for the first time.

    The Metropolitan Transportation Authority announced Wednesday that the machine had completed its work, thus ending a remarkable run in which seven such machines dug 16 new tunnels for the agency's trains in a little under five years.

    MTA chairman Joseph Lhota said in a statement that the feat "reminds us that New Yorkers remain capable of great achievements."

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    [NY] MTA Hard at Work on East Side Access Project
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    In addition to linking LIRR trains to Grand Central, the authority is also building a new subway line beneath 2nd Avenue on Manhattan's East Side, and extending the No. 7 subway line on the West Side.

    To dig the tunnels, engineers operated the boring machines around the clock. Each used an array of steel-cutting discs, powered by 6 million pounds of thrust, to reduce Manhattan's granite to muck.

    With all of their trailing gear, some of the contraptions were nearly 360 feet long.

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