S.C. Code Ann. § 13-11-90

The Authority may exchange any property acquired under the provisions of this chapter for other property usable in carrying out the powers hereby conferred or may purchase property for purposes of the Authority and also may remove buildings or other structures from lands needed for its purposes for reconstruction on other locations upon the payment of just compensation if, in its judgment, it is necessary or expedient to do so in order to carry out any of its plans for development under the authorization of this chapter.