sentences:  Demopolis is served by several railway companies, including Norfolk Southern Railway, BNSF Railway, and the Alabama and Gulf Coast Railway.The Alabama State Port Authority has inland docks at the Port of Demopolis with direct access to inland and Intracoastal waterways serving the Great Lakes, the Ohio and Tennessee rivers and the Gulf of Mexico via the Tennessee-Tombigbee Waterway.The Demopolis Municipal Airport is located northwest of the city, adjacent to Airport Industrial Park and the Tennessee-Tombigbee Waterway.