Tennessee Tombigbee Waterway. R&D Maintenance Services, Inc. provides operations and maintenance services on U.S Army Corps of Engineers (USACE) projects throughout the southeast - since 1980. We are the Operations and Maintenance Contractor for the Tennessee-Tombigbee Waterway / Alabama Rivers Project providing machinery and facility maintenance and repair on several hundred miles of waterway and 10 locks / dams / spillways on the system. Positi...