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The I-10 Bonnet Carré Spillway Bridge is a twin concrete trestle bridge in the U.S. state of Louisiana. With a total length of 58,077 feet (17,702 m; 10.9994 mi), it is one of the longest bridges in the world. The bridge carries Interstate 10 over the Bonnet Carré Spillway, Lake Pontchartrain, and L
aBranche Wetlands in St. Charles Parish and a portion of St. John the Baptist and Jefferson Parishes. The bridge opened in 1972.
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