The Mississippi River Basin Model was a large-scale hydraulic model of the entire Mississippi River basin, covering an area of 200 acres. It is part of the Waterways Experiment Station, located near Clinton, Mississippi. The model was built from 1943 to 1966 and in operation from 1949 until 1973. By comparison, the better known San Francisco Bay Model covers 1.5 acres and the Chesapeake Bay Model covers 8 acres. The model is now derelict, but open to the public within Buddy Butts Park, Jackson.