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June 25

1958

Mackinac BridgeThe official dedication ceremonies for the newly built Mackinac Bridge began with the first "Governor's Walk" across the bridge. In 1957, the erection of the main suspension span and paving of the roadway brought the gigantic four-year construction process to an end. While the new bridge was opened to traffic in November of 1957, the contractors did not finish all the work until September of 1958. The official bridge dedication ceremonies began on June 25, 1958, with the first "Governor's Walk" across the bridge. The ceremonies ended four days later. The Bridge spans five miles across the Straits of Mackinac between the cities of Mackinaw City and St. Ignace. When it was constructed, the “Mighty Mac” was the world's longest suspension bridge (determined by the distance between cable anchorages). The twin towers of the bridge reach 552 feet into the air. The bridge weighs 11,840 tons and is 8614 feet long. The total length of the steel wire spun to form the two main cables is 42,000 miles.