S.C. Code § 5-31-20
No person shall turn, remove, raise or in any manner tamper with any cover of any manhole, filter, bed or other appurtenance of any public sewer without a written permit from the proper authorities of such works and no person except those engaged by the proper authorities shall enter any public sewer without a special written permit.
And no person shall, either within or without any city or town, obstruct, damage or injure any pipe, ditch, drain, filter, beds or appurtenance of any waterworks, sewerage or drainage of any such city or town.
Every person violating any of the provisions of this section shall be guilty of a misdemeanor and, upon conviction, be subject to a fine not to exceed one hundred dollars or imprisonment for thirty days.
S.C. Code § 5-31-20