1. The various floodplain districts shall include areas subject to inundation by waters of the 100-year flood. The basis for the delineation of these districts shall be the Flood Insurance Study for the governing body prepared by the Federal Insurance Administration dated August 15, 1979, effective February 15, 1980, as amended.
2. The FW (Floodway District) is delineated for purposes of this Article using the criteria that a certain area within the floodplain must be capable of carrying the waters of the 100-year flood more than one foot at any point. The areas included in this area are defined in the floodway data table contained in the Flood Insurance Study as prepared by FEMA and shown on the recorded FIRM. Where no floodway has been delineated in the FIS, such information contained in any other available Federal, State or other acceptable source should be used.
3. The FF (Flood-Fringe District) shall be that area of the 100-year floodplain not included in the floodway. The basis for the outermost boundary of this area shall be the 100-year flood elevations contained in the flood profiles provided in the FIS. Where elevation information is not provided in the FIS, such information provided in any other available Federal, State or other acceptable source should be used.
4. The General Floodplain District (FA) shall be that floodplain area for which no detailed flood profiles or elevations have been provided. They are shown on the maps accompanying the FIS prepared by FIA. Where the specific 100-year flood elevation cannot be determined for this area using other sources of data such as the U.S. Army Corps of Engineers, Floodplain Information Reports, U.S. Geological Survey FloodProne Quadrangles, etc., then the applicant for the proposed use, development and/or activity shall determine this elevation in accordance with hydrologic and hydraulic engineering techniques. Hydrologic and hydraulic analyses shall be undertaken only by professional engineers or others of demonstrated qualifications, who shall certify that the technical methods used correctly reflect currently accepted technical concepts. Studies, analyses, computations, etc., shall be submitted in sufficient detail to allow a thorough technical review by the governing body.
(Ord. 935, 5/10/2018, §27-1204)