This Code’s protection standard is the base flood. The best available base flood data are listed below. Whenever a party disagrees with the best available data, the party shall finance the detailed engineering study needed to replace existing data with better data and submit it to the FEMA and IDNR/OWR for approval prior to any development of the site.
(A) The base flood elevation for the floodplains of Mississippi River, Dutch Creek, Clear Creek, and Hutchins Creek shall be as delineated on the 100-year flood profiles in the countywide Flood Insurance Study of Union County prepared by the Federal Emergency Management Agency and dated May 2, 2008, Flood Insurance Study.
(B) The base flood elevation for each floodplain delineated as an “AH Zone” or “AO Zone” shall be that elevation (or depth) delineated on the countywide Flood Insurance Rate Map of Union County.
(C) The base flood elevation for each of the remaining floodplains delineated as an “A Zone” on the countywide Flood Insurance Rate Map of Union County shall be according to the best data available from federal, state or other sources. Should no other data exist, an engineering study must be financed by the applicant to determine base flood elevations.