(a) The authority may:
(1) control, develop, store, and preserve the waters and flood waters of the Upper Guadalupe River and its tributaries inside or outside the authority for a beneficial or useful purpose;
(2) purchase, acquire, build, construct, improve, extend, reconstruct, repair, and maintain any dam, structure, waterworks system, sanitary sewer system, storm sewer system, drainage system, irrigation system, building, waterway, pipeline, distribution system, ditch, lake, pond, reservoir, plant, and recreational facility for public use, and any other facility or equipment in aid of a purpose described by Subdivision (1);
(3) purchase or otherwise acquire a necessary site, easement, right-of-way, land, or other property necessary for a purpose described by Subdivision (1); and
(4) sell water and other services.
(b) The authority may use any practical means to exercise a right, power, privilege, or function of the authority.