S.C. Code Ann. § 10-1-135: Encroachments on state-owned lands of natural significance.

For easements, rights-of-way, or any other encroachment on or over any state park, state forest, state historic area, state wildlife refuge or preserve, Heritage Trust Site, or other state-owned lands of natural significance the responsible management agency shall, in addition to the provisions of Section 10-1-130, make the following determinations prior to requesting approval from the Department of Administration and review by the Joint Bond Review Committee and approval by the State Fiscal Accountability Authority if necessary:

(a) There is an important public necessity for the encroachment;

(b) Alternative routes or locations not on state property are neither prudent nor feasible, and the proposed encroachment is not disruptive of the existing or planned uses of the state property;

(c) The entity responsible for the encroachment shall make reasonable mitigation of the impacts of the proposed encroachment, upon the recommendation of the governing body of the responsible management agency.