Notwithstanding any other provision of law, every water agency is authorized, in addition to and not in derogation or limitation of the powers conferred upon such agency by any other law, through contract or otherwise, to construct, maintain, improve, and operate recreational facilities appurtenant to any land, dams, reservoirs, facilities, or works appropriate or ancillary to such recreational use owned, operated, or contracted to be operated by such agency. Any contract for construction or improvement work under this part shall be subject to all applicable provisions of law governing contracts of the water agency.