S.C. Code Ann. § 58-31-30
The Public Service Authority has power to develop the Cooper River, the Santee River, and the Congaree River in this State, as instrumentalities of intrastate, interstate, and foreign commerce and navigation; to produce, distribute, and sell electric power; to acquire, treat, distribute, and sell water at wholesale; to reclaim and drain swampy and flooded lands; and to reforest the watersheds of rivers in this State; and also has all powers which may be necessary or convenient for the exercise of these powers, including without limiting the generality of the foregoing, the following powers:
(23) To acquire, treat, transmit, distribute, and sell water at wholesale within the counties of Berkeley, Calhoun, Charleston, Clarendon, Colleton, Dorchester, Orangeburg, and Sumter if requested in writing to do so by the governing body of any incorporated municipality, by the governing body of any special purpose district providing water service in the unincorporated areas of each county, or by the governing body of each county for those unincorporated areas not so provided water service by a special purpose district. The authority may not transfer water from one river basin to another except for those located in the counties specified in this item. However, the authority shall prepare and maintain its books and records for its water supply operations separate and apart from its books and records for the generation, transmission, and distribution of electric power. The costs of water supply operations, including the loss of the generation of hydroelectric power, may not affect rates and charges for electric service. Water must be offered for sale by the authority on a nondiscriminatory basis without regard to whether electricity is also purchased from the authority.
Without limiting the generality of the foregoing, the Public Service Authority shall have power and is hereby authorized from time to time to issue its negotiable bonds and to secure the payment of the same by mortgage, lien, pledge, or deed of trust, on or of all or any of its property, contracts, franchises or revenues. Said bonds shall be authorized by resolution of the board of directors and shall bear such date or dates, be in such forms, and contain such provisions, as the board of directors may determine. Any resolution or resolutions authorizing any notes, bonds, or other evidences of indebtedness may contain provisions, which shall be a part of the contract with the holders thereof, as to (a) the rates of tolls and other charges for use of the facilities of, or for the services rendered by, or for the commodities furnished by, the Public Service Authority, (b) the setting aside of reserves or sinking funds and the regulation and disposition thereof, (c) reserving the right to redeem the notes, bonds, or other evidences of indebtedness at such prices, not exceeding one hundred five per cent of the principal amount thereof and accrued interest, as may be provided, (d) limitations on the issuance of additional bonds, (e) the terms and provisions of any mortgage or deed of trust securing the bonds or under which the same may be issued and (f) any other or additional agreements with the holders of such notes, bonds or other evidences of indebtedness.
The Public Service Authority may enter into any mortgages, deeds of trust or other agreements with any bank or trust company or other person or persons in the United States having power to enter into the same, including the United States Government or any agency or creature thereof, as security for the notes, bonds or other evidences of indebtedness and may transfer, convey, mortgage or pledge all or any of the property, contracts, franchises or revenues of the Public Service Authority thereunder. Such mortgage, deed of trust or other agreement may contain such provisions as may be customary in such instruments or as the Public Service Authority may authorize, including (but without limitation) provisions as to (a) the construction, operation, maintenance and repair of the properties or facilities of the Public Service Authority, (b) the application of funds and the safeguarding of funds on hand or on deposit, (c) the rights and remedies of said trustee and the holders of the bonds, (d) possession of the mortgaged properties and (e) the terms and provisions of the bonds, and may also provide for a franchise for operation of the property and business of the Public Service Authority, or any part thereof, to any person, firm or corporation, including the United States Government, or any agency thereof, acquiring the mortgaged property or any part thereof upon foreclosure for a period of not to exceed twenty years from the date of such acquisition.
The powers herein conferred upon the board of directors shall not be construed to give the board of directors the power to sell, except by way of mortgage or deed of trust, all of the physical property of the Authority, but the board of directors may sell any surplus property which it may acquire and which said board of directors shall deem not to be necessary for the purpose of the development.