S.D. Codified Laws § 46A-10A-54
The board or commission shall appoint three judges, who shall elect one of their members as superintendent, to conduct an election to establish a coordinated drainage area. After the vote is cast and canvassed, the judges shall make a verified statement showing the number of ballots cast, together with the number voting for and the number voting against establishment, and shall return the results to the board or commission at its next meeting. After the canvass of such election, the board or commission shall make an order declaring that the coordinated drainage area has been established if the results of the election favor establishment. Subject to appropriate judicial review, such order shall be conclusive of the fact of establishment.
SDCL 46A-10A-54