In addition to the published notice required by § 31-13-37, the board of supervisors, at least fifteen days prior to the hearing on the adoption of the resolution, shall cause personal notice to be sent by first class, registered, or certified mail to each person owning property liable to be assessed for the improvement. The notice shall include all information required of the published notice. If the property is occupied and has a street address, the written notice shall be sent to the owner in care of such address and, if not, to the last known address of the owner.
SDCL 31-13-39