Kan. Stat. § 12-837
If the governing body of a city subject to K.S.A. 12-836, and amendments thereto, determines it necessary to improve the city's system of waterworks by enlarging, repairing, extending and improving the system, the governing body shall so declare by resolution. The city engineer or a person duly authorized to act for the city shall be directed by the resolution to forthwith prepare plans and specifications and a detailed estimate of the cost of the improvements and shall file the plans, specifications and estimate with the clerk of the city. Such plans, specifications and estimate shall be presented to the secretary of health and environment for approval. If approved by the secretary, the plans, specifications and estimate shall be returned to the clerk of the city, showing such approval. No bonds to pay the cost for any improvement provided for in this act shall be issued by the governing body of any city until the plans, specifications and estimate have been approved by the secretary of health and environment. The cost of any improvement provided for in this act shall in no case exceed the cost of the approved estimate.
K.S.A. 12-837