S.C. Code Ann. § 57-3-730: Cooperation with drainage districts in carrying drainage canals across state highways.

The department may cooperate with any drainage district within the State, organized in accordance with the laws of the State, in order to carry drainage canals across state highways. But the cost to be assumed by the department incident to any such crossing shall not exceed the actual cost of the structure necessary to carry the waters of the drainage canal across the state highway.