S.C. Code § 57-27-70
When the Department of Highways and Public Transportation determines that the topography of the land adjoining the highway does not permit adequate screening of a junkyard or the screening of the junkyard would not be economically feasible, the Department may acquire by gift, purchase, exchange, or condemnation, such interests in lands necessary to secure the relocation, removal, or disposal of the junkyards, and to pay for the costs of relocation, removal, or disposal. When the Department determines that it is in the best interest of the State it may acquire lands, or interests in lands, necessary to provide adequate screening of junkyards. The Department may exercise the power of eminent domain whenever it is necessary, in the judgment of the Department, to acquire lands, or interests therein, by condemnation.
S.C. Code § 57-27-70