All state authorities, commissions, boards, or governing bodies established by the State of South Carolina, (hereinafter referred to as "state authority") which have been, or may be created in the future, to develop waterways of the State for use in intrastate, interstate, and foreign commerce; to construct, maintain, and operate powerhouses, dams, canals, locks, and reservoirs; to produce, transmit, sell, and distribute electric power; to reclaim and drain swampy and flooded lands; to improve health conditions of the State; and to reforest watersheds, and for which purposes the acquisition of property is necessary, have the right of eminent domain.