As used in this chapter, unless the context otherwise requires:
(1) “Governing body” means bodies and boards, by whatsoever names they may be known, charged with the governing of a municipality;
(2) “Municipality” means any county or incorporated city or town of the state; and
(3) “Public works” means any one (1) or combination of two (2) or more of the following: water, sewerage, gas or electric heat, light or power works, plants and systems or parking facilities, together with all parts thereof and appurtenances thereto, including, but not limited to, supply and distribution systems, electrical power purchased from the Tennessee Valley authority or similar governmental agencies, on a current or long-term purchase basis, reservoirs, dams, sewage treatment and disposal works and generating plants.