|August 2011 (42.483 Degrees, -84.907 Degrees) 20 Mile Road OC|
The Historic Bridge Website shows a photo of the bridge plaque, which says the bridge was built by Holloway Construction and Raff and Dexter Contractors in 1960. However, I couldn't find any information on their construction methods. The website also says that this in one of the few remaining examples of this type of bridge that includes the original open steel railing mounted to concrete posts. Open versus closed railing is a source of never-ending controversy, especially for bridges along the coast, and especially because of the litigious nature of today's society.
Michigan's Bridges: 20 Mile Road Overcrossing in Calhoun County by Mark Yashinsky is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.