Sunday, Aug 23, 2020, 6:49 pm

By:Tony Williams

#7 Manchac Swamp Bridge

The Manchac Swamp Bridge is a twin concrete support bridge. It measures approximately 22.80 miles in length and is located in Louisiana. The Manchac is one of the longest bridges in the world over water. The bridge gets its name because it is on Interstate 55 over the Manchac Swamp in Louisiana. The Manchac Swamp Bridge opened in 1979.