S.C. Code Regs. 89-130. Operating Permit Survey Control Points

A. The operator shall be required to clearly mark the boundary of the permitted area prior to initiating mining. Boundary markers shall be maintained throughout the life of the mine. The operator shall also install and maintain two (2) permanent survey monuments or control points within the permitted area at least 100 feet apart. B. As determined to be necessary, the Department may require the operator to place control markers at the boundary of the area to be affected under the operating permit.