(A) This chapter’s protection standard is based on the flood insurance study of the county.
(B) (1) Whenever a party disagrees with the best available data, the party shall finance the detailed engineering study needed to replace the existing data with better data and submit it to the FEMA and IDNR/OWR for approval prior any development of the site.
(2) The base flood elevation for the floodplains of Macoupin Creek, Mill Creek, Phils Creek, Piasa Creek, Otter Creek, Illinois and Mississippi Rivers shall be as delineated on the 100-year flood profiles in the flood insurance study of Jersey County prepared by the Federal Emergency Management Agency on April 2, 2009. The base flood elevation for each floodplain delineated as an “AH Zone” or “AO Zone” shall be that elevation (or depth) delineated on the flood insurance rate map of Jersey County. The base flood elevation for each of the remaining floodplains delineated as an “A Zone” on the flood insurance rate map of Jersey 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 to determine base flood elevations.
(Ord. 21-4, passed 11-9-2021)