The Mackinac Bridge 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 19th-longest main span and the longest suspension bridge between anchorages in the Western Hemisphere.
The bridge opened to traffic on November 1, 1957. The Mackinac Bridge Authority is committed to preserve and maintain the State of Michigan’s single largest asset and one of the world’s leading suspension bridges to provide safe, pleasurable and expedient passage over the Straits of Mackinac for economic benefit and improved quality of life. The Mackinac Bridge is currently the fifth longest suspension bridge in the world. The Mackinac Bridge is the longest suspension bridge in the western hemisphere. The total length of the Mackinac Bridge is 26,372 feet. The length of the suspension bridge (including anchorages) is 8,614 feet. The length from cable bent pier to cable bent pier is 7,400 feet. Length of main span (between towers) is 3,800 feet.
The width of the roadway is 54 feet. The outside lanes are 12 feet wide (2), the inside lanes are 11 feet wide (2), the center mall is 2 feet wide, and the catwalk, curb and rail width is 3 feet on each side – totaling 54 feet. The stiffening truss width in the suspended span is 68 feet wide making it wider than the roadway it supports.The height of the roadway at mid-span is approximately 200 feet above water level. The vertical clearance at normal temperature is 155 feet at the center of the main suspension span and 135 feet at the boundaries of the 3,000 ft. navigation channel.
All suspension bridges are designed to move to accommodate wind, change in temperature, and weight. It is possible that the deck at center span could move as much as 35 feet (east or west) due to high winds. This would only happen under severe wind conditions. The deck would not swing or “sway” but rather move slowly in one direction based on the force and direction of the wind. After the wind subsides, the weight of the vehicles crossing would slowly move it back into center position.
|Mustang Stampede||July 20, 2019||Mackinaw City|
|St. Ignace Fish Feast||July 20, 2019||St. Ignace Marina|
|Mackinaw Historical Festival||August 02, 2019||Mackinaw Historical Village|
|Mackinaw Rendevous & Trade Fair||August 02, 2019||Conkling Heritage Park|
|Mackinaw Corvette Show||August 24, 2019||Mackinaw City|
|Mackinaw Arts & Crafts Show||August 24, 2019||Conkling Heritage Park|
|Mackinac Bridge Walk||September 02, 2019||Mackinac Bridge|
|Beer & Wine Festival||September 07, 2019||Mackinaw City|
|Fall Shoppers||October 04, 2019||Retail Shops|
|Fall on the Island Festival||October 11, 2019||Drummond Island Twp. Hall|
|Beauty and the Bridge||Mid Aug||Mackinac Bridge|
|Antique Tractor Show||Early Sep||Little Bear Arena & Downtown St Ignace|
|Winter Fest||Mid Jan||Mackinaw City|
|Mackinac Meltdown Celebration||Early Apr||Old Mackinac Point Lighthouse|
|Mackinaw Raptor Fest||Early Apr||Mackinaw City School|
|Jeep the Mac to Drummond||Late Apr||Drummond Island Twp. Hall|
|Jeep the Mac - Drummond Island Spring Migration Bash||Late Apr||Drummond Island|
|Magical Color Fun Run||Early May||Mackinaw City|
|St. Ignace Rock & Run||Mid May||Star Line Railroad Dock|
|Memorial Day Parade||Late May||Down Town Mackinaw City|
|Memorial Day Weekend Pageant||Late May||Mackinaw City|
|Waterway Festival||Late Jun||Downtown Cheboygan|
|Summer Arts & Crafts Show||Late Jun||Conkling Heritage Park|
|St. Ignace Heritage Days||Mid Jul||Museum of Ojibwa Culture|