SDCL § 31-12-11: Commencement of construction work.

After the survey and plan for each section of the county highway system has been prepared by or for the county highway superintendent, and specifications and an estimate of the cost therefor also prepared and approved by the board of county commissioners, such board of county commissioners may thereupon proceed as provided in this chapter with the construction of the road, tile, and culvert work in accordance therewith.