This bridge is an example of an unusual patented type of bascule bridge. Reportedly, only eight examples of this bascule type were ever built in the country. Today, only six of those eight bridges remain. Three of those six are truss bascule bridges in Michigan, while the remaining three are plate girder bascule bridges in this region of California. There used to be a truss bascule example in Texas and a plate girder bascule example in Wisconsin, but both have been demolished. Each surviving Abt bascule bridge is highly significant as a rare example of an unusual patented bascule type. For a full history of Abt bascule bridges, please visit the Port Huron Railroad Bridge page.
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