SDCL § 9-43-81: Plans and specifications.

If the governing body deems it necessary that a local improvement to be financed in total or in part by special assessment be constructed or maintained, it shall cause plans and specifications showing the location, arrangement, form, size, and materials to be used in the construction to be prepared by the city engineer or other competent person. The plans and specifications shall be filed in the office of the finance officer and available for examination by any interested party.