S.C. Code Ann. § 51-13-780

For the acquiring of rights-of-way and property necessary for the construction of structures, including piers, ships, docks, quays, and other riparian and littoral facilities and structures and approaches to them and transportation facilities needful for their convenient use and highways, causeways, and bridges and for the acquiring of property necessary for the Patriot's Point development project, the Authority may purchase them by negotiation or may condemn them. The power of eminent domain shall apply not only to all property of private persons or corporations but also to property already devoted to public use within the area of jurisdiction of the Authority.