‘Drainage project’ means any natural and artificial watercourses, wells, ditches, lakes, reservoirs, revetments, canals, levees, dikes, walls, embankments, bridges, sewers, culverts, syphons, sluices, flumes, ponds, dams, retarding basins, and other water diversion and storage facilities, pumping stations, stream gauges, rain gauges, flood warning service and appurtenant telephone, telegraph, radio and television service, and all appurtenances and incidentals necessary, useful or desirable for any such facilities (or any combination thereof), including real and other property therefor.