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Mackinac Bridge

Mackinac Bridge
Mackinac Bridge from the air4.jpg
Coordinates 45°48′58″N 84°43′37″W / 45.816°N 84.727°W / 45.816; -84.727Coordinates: 45°48′58″N 84°43′37″W / 45.816°N 84.727°W / 45.816; -84.727
Carries 4 lanes of I-75 / GLCT
Crosses Straits of Mackinac
Locale St. Ignace and Mackinaw City, Michigan
Other name(s) Mighty Mac or Big Mac
Maintained by Mackinac Bridge Authority
Characteristics
Design Suspension bridge
Total length 26,372 feet (8,038 m)
Width 68.6 feet (20.9 m) (total width)
54 feet (16 m) (road width)
38.1 feet (11.6 m) (depth)
Height 552 feet (168 m) (tower height); 200 feet (61 m) (deck height)
Longest span 3,800 feet (1,158 m)
Clearance below 155 feet (47 m)
History
Designer David B. Steinman
Opened November 1, 1957
Statistics
Daily traffic 11,600
Toll $2.00 per axle for passenger vehicles ($4.00 per car). $5.00 per axle for motor homes, and commercial vehicles.
MackinacBridge.svg
The Mackinac Bridge connects St. Ignace and Mackinaw City.

The Mackinac Bridge (/ˈmæknɔː/ MAK-in-aw) is a suspension bridge spanning the Straits of Mackinac to connect the Upper and Lower Peninsulas of the U.S. state of Michigan. Opened in 1957, the 26,372-foot (8.038 km) bridge (familiarly known as "Big Mac" and "Mighty Mac") is the world's 17th-longest main span and the longest suspension bridge between anchorages in the Western Hemisphere. The Mackinac Bridge is part of Interstate 75 and the Lakes Michigan and Huron components of the Great Lakes Circle Tours across the straits; it is also a segment of the U.S. North Country National Scenic Trail. The bridge connects the city of St. Ignace on the north end with the village of Mackinaw City on the south.

Envisioned since the 1880s, the bridge was designed by the engineer David B. Steinman and completed in 1957 only after many decades of struggles to begin construction.

The bridge opened on November 1, 1957, connecting two peninsulas linked for decades by ferries. A year later, the bridge was formally dedicated as the "world's longest suspension bridge between anchorages", allowing a superlative comparison to the Golden Gate Bridge, which had a longer center span between towers, and the San Francisco–Oakland Bay Bridge, which had an anchorage in the middle.


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