(15) "Maintenance" means work performed to keep equipment operable or to make repairs without altering the operation of the water-based system.

(15) "Maintenance" means the preservation of a public road, including repairs and resurfacing not amounting to construction as defined in this Code section.

(13) "Maintenance" means all general expenses for care such as board; shelter; clothing; medical, dental, and hospital care; transportation; and other necessary or incidental expenses.