S.C. Code Ann. § 57-17-130: Unauthorized diversion of highways.

The county supervisor of the county in which any part of a highway has been diverted from its original course without authority of law, on information of any two persons, shall commence a suit against any such person so offending in order to compel him, as soon as may be, to restore, at his own expense, the highway in its course, as established by law.