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A concrete curved-chord through girder bridge, sometimes known as a camelback bridge, is a type of concrete bridge most common in the U.S. state of
A concrete curved-chord through girder bridge, sometimes known as a camelback bridge, is a type of concrete bridge most common in the U.S. state of Michigan
Michigan () is a state in the Great Lakes region of the upper Midwestern United States. With a population of nearly 10.12 million and an area of nearly , Michigan is the 10th-largest state by population, the 11th-largest by area, and the ...
and the Canadian province of Ontario
Ontario ( ; ) is one of the thirteen provinces and territories of Canada.Ontario is located in the geographic eastern half of Canada, but it has historically and politically been considered to be part of Central Canada. Located in Central Ca ...
. The type was designed by C.V. Dewart, the first professional bridge engineer of the Michigan State Highway Department
The Michigan Department of Transportation (MDOT) is a constitutional government principal department of the US state of Michigan. The primary purpose of MDOT is to maintain the Michigan State Trunkline Highway System which includes all Interstate ...
. By the early 1920s, the Michigan State Highway Department had produced standardized designs for these bridges in lengths of 50, 60, 70, 75 and 90 feet. The first such bridge in Michigan was built in 1922 over the Raisin River
The River Raisin is a river in southeastern Michigan, United States, that flows through glacial sediments into Lake Erie. The area today is an agricultural and industrial center of Michigan. The river flows for almost ,U.S. Geological Survey. ...
at Tecumseh
Tecumseh ( ; October 5, 1813) was a Shawnee chief and warrior who promoted resistance to the expansion of the United States onto Native American lands. A persuasive orator, Tecumseh traveled widely, forming a Native American confederacy and ...
. By the end of the decade, the design fell out of favor since they could not be widened to handle increasing traffic.
, the longest surviving example in Michigan is the three-span, US 12–St. Joseph River Bridge, built in 1922 in Mottville.
List of bridges
* 23 Mile Road–Kalamazoo River Bridge * Avery Road–Galien River Bridge * Lincoln Road–Pine River Bridge * Second Street–Gun River Bridge * Ten Curves Road–Manistique River Bridge * Thornapple River Drive Bridge * US 12–St. Joseph River Bridge * Wadhams Road–Pine River Bridge * Vernier Street–Swan Creek BridgeNotes
References
{{Commons category, Concrete curved-chord through girder bridges, position=left Transportation in Michigan Transport in Ontario