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 the 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 Illinois river(s)/creek(s) shall be as delineated on the 100-year flood profiles in the applicable countywide Flood Insurance Study of LaSalle County by the Federal Emergency Management Agency and dated July 18, 2011.
(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 LaSalle County.
(C) The base flood elevation for each of the remaining floodplains delineated as a “A Zone” on the countywide Flood Insurance Rate Map of LaSalle 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 LaSalle County that are within the extraterritorial jurisdiction of the City of Marseilles, or that may be annexed into the City of Marseilles, shall be as delineated on the 100-year flood profiles applicable in the Flood Insurance Study of LaSalle County prepared by the Federal Emergency Management Agency and dated July 18, 2011.
(Ord. 1302, passed 11-7-07; Am. Ord. 1447, passed 7-6-11)