California Reclamation Districts
California Reclamation Districts are legal subdivisions within California's Central Valley that are responsible for managing and maintaining the levees, fresh water channels, or sloughs (pronounced slü), canals, pumps, and other flood protection structures in the area. Each is run autonomously and is run by an elected board and funded with taxes to property owners in the local area.
Source: Wikipedia — California Reclamation Districts (CC BY-SA 4.0)