Ala. Code § 11-50-271: Consolidation of Gas and Waterworks Plants and Systems.

Any such waterworks board may, if it so elects, combine any waterworks plant and system owned by it with any gas plant and system owned by it and provide for the operation, maintenance, and repair thereof as one combined and consolidated plant and system, the keeping of books and records for one combined plant and system, and the borrowing of money for any purpose authorized by law and the issuance of revenue bonds payable from the revenues of both the waterworks and the gas plants and systems, or such waterworks board may keep and operate such waterworks plant and system separate from its gas plant and system.