S.D. Codified Laws § 9-41A-53
A municipal power agency may contract for planning, acquisition, construction, reconstruction, operation, maintenance, repair, extension, and improvement of generation and transmission facilities outside of the corporate limits of its members, or may contract with other public or private owners of these facilities to perform these functions, without advertising for bids, preparing final plans and specifications in advance of construction, or securing performance and payment bonds as required for other public contracts in § 5-21-1, except to the extent that its governing body determines that these actions are desirable in furtherance of the purposes of this chapter. Except as otherwise provided by this section, no contract shall be invalid or unenforceable by reason of nonperformance of the conditions required by any other law relating to public contracts. If a bond is secured, no lien may be filed under chapter 44-9 for the furnishing of labor, skill, material, or machinery for the improvement covered thereby.
SDCL 9-41A-53