Heavy Duty Gear Drives
The Lindsey Warren bridge that spans 3 miles across the Alligator River in North Carolina recently underwent a major renovation. Originally built in 1962, the two-lane bridge carries U.S. 64 vehicular traffic between Tyrrell and Dare counties.
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The New York City Subway is one of the most extensive public transportation systems in the world with 842 miles of track, 468 stations and over 6,200 rapid transit cars. Keeping the vast fleet of rolling stock in-service is a never-ending task.
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Originally built in 1882, the Hines Memorial bridge crosses over the Merrimack River between Amesbury and Salisbury, MA. The bridge features a swing span section which pivots to allow passage of barge and boat river traffic. The Massachusetts Dept. of Transportation commissioned a comprehensive redesign and rebuild of the bridge which was completed in 2012.
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The World War Memorial bridge, built in 1922, spans the Piscataqua River between Portsmouth, NH and Badger’s Island in Kittery, ME. The through-truss lift bridge features a center vertical lift span that can be fully opened (providing a clearance of 130 ft.) to allow large commercial vessels to pass or partially raised for smaller recreational boat traffic.
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The Blynman Bridge in Gloucester, Massachusetts recently underwent a major rehabilitation including new gear drives. The bascule lift bridge crosses a small canal that connects the Annisquam River to Gloucester Bay. With over 8,000 openings per year and over 14,000 vehicle crossings per day, this 107-year-old bridge is one of the most active in the East Coast of the USA.
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