S.C. Code § 49-11-210
A separate application for each dam or reservoir and all enlargements, removals, or repairs to existing dams or reservoirs must be filed with the department upon forms to be provided by it, except only one application need be filed for a dam and the reservoir which will contain the water impounded by the dam. The application must be accompanied by maps and plans and specifications of a character and size and setting forth pertinent details and dimensions required by regulation. The application for construction of a new dam or reservoir whose failure likely would cause loss of life or substantial property damage, a dam or reservoir classified as high or significant hazard under existing regulations, must include a fully-developed emergency action plan in a format the department by regulation requires. After the dam or reservoir is constructed, this emergency action plan must be updated by the owner of the dam or reservoir each time it becomes noncurrent.
S.C. Code § 49-11-210