Mark Twain Memorial Bridge (1936) Mark Twain Memorial Bridge (1936) The Mark Twain Memorial Bridge was a Cantilevered Through Truss Bridge carrying US 36 over the Mississippi River. It was replaced in 2000 with the extension of I-72 and subsequently demolished. The bridge, which replaced motor vehicle use of the Wabash Bridge, was opened in 1936 by President Franklin D. Roosevelt and entered Missouri at the foot of Cardiff Hill which appeared in Twain's books The Adventures of Tom Sawyer and The Adventures of Huckleberry Finn. A crosswalk crossed the highway, connecting the Twain boyhood home with the lighthouse at the top of the hill.
Mark Twain Lake there are thousands of prime hunting grounds easily accessible from hunter/fisherman parking lots located throughout the area. Near the lake, north of the village of Florida, are a group of prehistoric burial mounds; this site, known as the Crigler Mound Group, is listed on the National Register of Historic Places. Mark Twain Lake Mark Twain Lake is located in Ralls County, Missouri and Monroe County, Missouri. It was created by the Clarence Cannon Dam (formerly called "Joanna Dam") impounding the Salt River and is located about southwest of Hannibal. The lake was named for Missouri author Mark Twain and part