S.D. Codified Laws § 31-13-58
No operations to repair erosion damage pursuant to § 31-13-57 may be undertaken by the township unless the conservation district in which the land is located has by resolution approved such action and until a notice that the erosion on the lands constitutes a nuisance has been given to the owner by the township. Notice shall be given by personal service upon the owner or by personal service upon the person in actual possession of the premises, with a copy of the declaration filed in the office of the county auditor. The declaration shall state that unless the owner corrects the damage within thirty days of the declaration, repairs shall be undertaken by the township, and the cost shall be assessed against the landowner's property if not paid before the first of November. The resolution of assessment shall be recorded in the minutes of the board of county commissioners, the original delivered by the clerk of the board to the county auditor, and a copy sent by registered mail to the landowner at the address shown on the records of the county auditor and to the operator.
SDCL 31-13-58