S.D. Codified Laws § 31-13-33
Whenever the board of supervisors of any township deem it necessary to open, widen, extend, grade, gravel, surface with oil or other bituminous material, pave, repave, bridge, construct a viaduct upon or over, erect equipment for street lighting in, curb, gutter, drain, or otherwise improve any streets within platted land or subdivision for which a special assessment is to be levied, it shall declare in a resolution the necessity of the improvement. The resolution shall state the streets to be improved, the general nature of the proposed improvement, the material to be used or materials from which a choice may be made, an estimate of the total cost per linear foot, a description of the classes of lots to be assessed, and the method of apportioning the benefits thereto as provided in §§ 31-13-42 to 31-13-46, inclusive.
SDCL 31-13-33