![]() 12 It was also fracture critical, meaning that one critical fracture of any steel member could cause the bridge to fail completely because structural members would not be able to transfer the structure’s load to other components. Unlike other major bridges in metropolitan New York, the Tappan Zee Bridge was designed to last only 50 years because of material shortages during the Korean War at the time of its construction. 11 Tolls for eastbound drivers were doubled. Tolls were originally levied for motorists in both directions, but the toll was removed for westbound drivers in August 1970. Averell Harriman officially named the structure the Tappan Zee Bridge on February 28, 1956. ![]() 8 9 It was completed at the cost of $81 million. 7 Their buoyancy would support some of the loads and help reduce costs.Ĭonstruction on the new bridge began in March 1952 and it opened to traffic on December 15, 1955, along with a 27-mile segment of the New York State Thruway from Suffern to Yonkers. 6 Praeger, who had helped develop floating caissons during World War II when the Allied forces needed to construct portable harbors for the invasion of Normandy in 1944, 6 sought to use to support the main through truss span on eight hollow concrete caissons. The new Tappan Zee Bridge was designed by Emil Praeger of Madigan-Hyland. ![]() The Port dropped its plans to construct a bridge on its own. 3 4 5 The side effect was that the selected site was at the Hudson River’s second-widest point, adding to construction costs. On May 12, Dewey proposed the construction of a bridge between Nyack and Tarrytown, just outside of the Port Authority’s jurisdiction to ensure that revenue collected from tolls would go to the New York State Thruway Authority, not the Port Authority. Driscoll of New Jersey, to work on a compromise that would offer Thruway customers a discounted bridge fare at a more southern crossing. 2 It suggested that Dewey work with his counterpart, Governor Alfred E. 1 An editorial in the New York Times suggested that a bridge could be constructed in southern Dobbs Ferry or northern Hastings-on-Hudson where the river narrowed considerably from its three-mile width at Tappan Zee. The Port Authority had promised its bondholders that it would not allow any other entity to construct a river crossing within its jurisdiction, which extended north to a point one mile south of Nyack and Tarrytown. Dewey who desired a bridge that would connect the New York State Thruway to the New England Thruway bypassing the congested crossings closer to New York City. 1 The proposal was overridden by New York State Governor Thomas E. The Port Authority of New York and New Jersey began planning efforts in 1950 for a bridge across the Hudson River near Dobbs Ferry, New York as a way of relieving traffic congestion near its existing bridges and tunnels, most notably the George Washington Bridge. The Tappan Zee Bridge carries the New York State Thruway and Interstates 87 and 287 over the Hudson River between Tarrytown and Nyack, New York.
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