The use of all water required for irrigation of lands of any district formed under the provisions of chapter 46A-4, together with canals and ditches already constructed, the rights-of-ways for canals and ditches, sites for reservoirs and pumping plants, and all other property required in fully carrying out the pertinent provisions of this title, is hereby declared to be a public use, subject to the regulation and control of the state in the manner prescribed by law.
SDCL 46A-5-1