The Hauraki Plains County Council is hereby empowered from time to time to sink such wells or shafts and make, construct, install, maintain, procure, and alter such reservoirs, dams, weirs, waterworks, cisterns, tanks, aqueducts, tunnels, cuts, excavations, races, sluices, pipes, culverts, drains, engines, pumps, and other works and appliances necessary or incidental to the water-supply works above mentioned.