S.D. Codified Laws § 46A-10A-87
If a board deems it desirable to make drainage improvements and the estimated cost exceeds ten thousand dollars, it shall set a date for a hearing on the matter and on the matter of reclassification of benefits for the cost of the improvements and shall provide notice as provided in § 46A-10A-62. At the hearing the board shall hear testimony on the feasibility of the improvements and on reclassification and shall take action as it considers desirable regarding the improvements. If, due to extensive modification to the project and its operation, the board determines a reclassification of benefits should be undertaken, the board shall proceed in accordance with §§ 46A-11-2 to 46A-11-4, inclusive. Any affected party has the right to appeal the board's decision to reclassify benefits and to such classification, if accomplished.
SDCL 46A-10A-87