S.D. Codified Laws § 5-2-10
The State of South Dakota, through its several departments, agencies, and institutions, and counties through their boards of county commissioners, may grant perpetual easements on lands under their control, dedicating to the public permanent use of the same in the use of water conservation projects or public parks, and may grant easements on or over such lands to any person, association, or corporation, granting the right to erect and maintain poles and wires for the purpose of conducting or transmitting electricity for lighting, heating, and power purposes. The Board of Regents and the executive branch may also grant easements for water, sewer, and fuel lines on land, or air rights over land, at the institutions under their control, which shall be executed pursuant to § 5-2-11.
SDCL 5-2-10