S.D. Codified Laws § 9-38-35
Neither the governing body nor the board may permit any person to build or maintain any structure within any park or parkway under the control of the board. No structure may be erected or maintained within any park or parkway except such structures or buildings as may be erected by the board for park purposes, and such statues, monuments, works of art, or structures intended for ornamentation only as may be erected by authority of the board. However, the governing body or the board may authorize the building and operation of tourism, science, or information centers within any park or parkway. The centers may include the administrative offices of any nonprofit association or corporation responsible for the operation of the center. If a water tower is located within a park or on park land, the governing body or the board may authorize the installation of communications equipment, including personal wireless service equipment, on the tower or on the ground and may authorize the installation of equipment to run wires or cables underground across the park land in order to connect the installation with facilities located outside the park land. The governing body or board shall establish the terms and conditions for any such installation in a lease or license agreement.
SDCL 9-38-35