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Mackinac Bridge  

The Mackinac Bridge is the fifth longest suspension bridge in the world and the longest in the Western Hemisphere with a total length of 26,372 feet. It is located in the United States of America and connects Michigan’s Lower and Upper peninsulas. Its main span makes it the 19th longest bridge in the world. The construction of the bridge started on May 7, 1953. It was opened to traffic on November 1, 1957. The total construction cost was $99,800,000 and more than 3,500 workers were employed at the bridge site. The height of its main towers above water is 552 feet.

Fast Facts: –

  • At the mid span, the 54 feet wide roadway is 199 feet above water.
  • There are 42,000 miles of wire in the main cables. All these cables weigh around 11,840 tons.
  • Total weight of the bridge is 1,024,500 tons and it includes around 931,000 tons of concrete.
  • The commission to design this bridge was given to David B. Steinman, a highly respected engineer and bridge builder.
  • On every Labour Day, an annual Mackinac Bridge walk is held. Every year around 50-80,000 people led by the Governor of Michigan walk together over the bridge.
  • The actual suspended section of the bridge between anchorages measures 8,614 feet as its overall length includes approach sections on a self-supporting pontoon.
  • In the construction of the bridge, deck stiffening trusses are used to reduce oscillation of the structure.
  • According to an estimate more than half a million cars cross the bridge in one month.
  • The first car to officially cross the brand new Mackinac Bridge was a 1951 Chevrolet Styleine Deluxe.

 

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