(1) In order to utilize the Alternate Floodplain District regulations, a property owner or user shall submit to the planning and zoning board a plan for adequate flood protection against the amount of water that would flow past the property in cubic feet per second, as determined by the above study used as basic data for determining the extent of the Floodplain Districts. Such plan must be approved by the Planning and Zoning Board before the alternate Floodplain District regulations may be utilized.

(2) The plan must include a report by a registered professional engineer of demonstrated competence in hydrology as to the adequacy of the proposed plan for flood protection relative to the elevation of the floodplain and the flow as determined in the aforementioned flood elevation study, the effect of the proposed improvement on the flood problems of other properties and such other hydrologic problems as may result from the improvements.

(3) The Planning and Zoning Board may require such additional data or engineering studies from the applicant as may be necessary to determine the adequacy of the proposed plan for flood protection.

(4) The approval of the Planning and Zoning Board of such plans for flood protection does not constitute a representation, guarantee or warranty of any kind by the City or by any officer or employee thereof as to the practicality or safety of any protective measure and shall create no liability upon or cause action against such public body, officers or employees for any damage that may result pursuant thereto.