No purchase pursuant to § 51.35 shall be made until plans and specifications of the location, arrangement, form, and size, and material to be used in the construction of such sewer or sewers and an estimate of the cost of constructing the same at the time of making such estimate shall have been made and filed by the engineer or other competent person and a resolution providing for such purchase has become effective after notice and hearing thereon as provided in the case of a resolution to construct service sewers.
(SDCL § 9-48-17)