S.D. Codified Laws § 38-8-90

After five years following the organization of a district under the provisions of this chapter, but before April first of the year in which the general election is to be held, any ten percent of the voters registered for the last general election within the boundaries of the district may file a petition with the State Conservation Commission praying that the operations of the district be terminated and the existence of the district discontinued. The commission may conduct such public meetings and public hearings upon the petition as may be necessary to assist it in considering the petition and in determining whether public support for the petition is sufficient to warrant a referendum.