S.C. Code Ann. § 57-13-120: Owners of milldams and bridges shall keep them in repair.

All owners of milldams and bridges in connection therewith over which any public highway shall pass shall keep the same in good repair, and no county shall be responsible for repairs upon them, except that the governing body of any county may have any such dam or bridge repaired in the ordinary way of repairing highways and bridges, if, in their opinion, such ordinary repairs be just.