S.D. Codified Laws § 1-15-14
The Department of Corrections may condemn private property for public use. The term "private property" includes that portion of any street, alley, or other public highway along both sides of which the land is owned by the state. If the Department of Corrections considers it necessary to condemn any private property for the purpose of erecting or repairing any building or buildings or extending grounds and premises of any of the correctional institutions of the state of which it has control, the secretary of corrections shall declare such condemnation necessary, stating the purposes and extent thereof, and communicate the same to the attorney general, and thereupon proceedings for such condemnation shall be had, in the name of the state as plaintiff, as provided in chapter 21-35.
SDCL 1-15-14