A NEW NEW YORK ICON NEARS COMPLETION


BY: BOB GLENN, EDITOR W 24 NOVEMBER–DECEMBER 2017


hat could you build with four billion dollars? One answer to that question is taking on its final shape over the Hudson River north of New York


City. The replacement to the Tappan Zee Bridge, referred to as the New NY Bridge—and now officially named the Governor Mario M. Cuomo Bridge—has begun handling all of the traffic previously carried by the Tappan Zee.


Te price tag is far from the only astounding number tallied up in the scope of this project. With two 3.1-mile spans handling opposing directions of traffic to replace the old structure, the project will include 220 million pounds of steel and 300 thousand cubic yards of concrete—with much of that concrete produced by floating batch plants. Te main span’s 192 stay cables, themselves 14 miles long, include more than 700 miles of steel strands. Te road deck surface of the finished structures will exceed 65 acres. And some of the largest components have been placed by a floating crane boasting a 328-foot lifting arm, 1,929 tons of lifting capacity, and ballast tanks that can hold two million gallons of water. And unlike the span it replaces, it’s all designed to last 100 years without requiring major repair. Work on the project has been extensively documented and publicized by the New York State Truway Authority


at the New NY Bridge website www.newnybridge.com. Tere are dozens and dozens of Progress Updates and Press Releases along with a massive gallery of work-in-progress photos and videos. Following are some project highlights based on a review of that material, but there is far more to learn and see on the site.


From Underwater to Overhead Permanent construction efforts began on the site a little more than four years ago on October 16, 2013. Te majority of work in the first year happened underwater, where the new bridges will ultimately stand on more than 1,000 piles. Tese include the project’s largest piles, with a diameter of six feet, and length approaching 300 feet—and the longest nearly 350 feet and four feet in diameter.


WIRE ROPE EXCHANGE


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