This chapter’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 the Ohio River shall be as delineated on the 100-year flood profiles in the Flood Insurance Study of the city prepared by the Federal Emergency Management Agency and dated April 18, 1983.
(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 Flood Insurance Rate Map of the city.
(C) The base flood elevation for each of the remaining floodplains delineated as an “A Zone” on the Flood Insurance Rate Map of the city shall be according to the best data available from federal, state or sources. Should no other data exist, an engineering study must be financed by the applicant to determine base flood elevations.
(D) The base flood elevation for the floodplains of those parts of unincorporated Massac County that are within the extraterritorial jurisdiction of the city or that may be annexed into the city shall be as delineated on the 100-year flood profiles in the Flood Insurance Study of Massac County prepared by the Federal Emergency Management Agency and dated July 5, 1983 and December 3, 2009.
(Ord. 89-5, passed 4-24-1989; Am. Ord. 2013-17, passed 9-23-2013)