15.68.040   Base flood elevation.
This chapter's protection standard is based on the Regulatory Flood Profiles for the Countywide Flood Insurance Study for Cook County dated September 10, 2021. If a BFE is unavailable for a particular site, then the protection standard shall be according to the best existing available data from federal, state or other sources. When a party disagrees with the best available data or should no other data source exist, that party may finance the detailed engineering study needed to replace existing data with better data and submit it to IDNR/OWR and FEMA for approval.
   A.   Base Flood for Skokie River SFHA. The BFE for the SFHAs of the Skokie River shall be as delineated on the 100 year flood profiles in the Countywide Flood Insurance Study for Cook County prepared by the FEMA and dated September 10, 2021, and such amendments to such study and maps as may be prepared from time to time.
   B.   Base Flood for SFHAs within the Village' s Extraterritorial Jurisdiction. The BFE for the SFHAs of those parts of unincorporated Cook County that are within the one and one-half mile extraterritorial jurisdiction or that may be annexed into the Village shall be as delineated on the base flood profiles in the Countywide Flood Insurance Study for Cook County prepared by the FEMA and dated September 10, 2021, and such amendments to such study and maps as may be prepared from time to time.
   C.   Base Flood for AH and AO Zones. The BFE for each SFHA delineated as an AH zone or AO zone shall be that elevation (or depth) delineated Countywide FIRM of Cook County and as described in § 601.4.B-C of the WMO.
   D.   Base Flood for A Zones. The BFE for each of the remaining SFHAs delineated as an A zone on the Countywide FIRM of Cook County shall be according to the best existing data available from federal, state, or other sources. When no BFE exists, the BFE shall be determined according to § 601.6 of the WMO. Flood flows should be based on anticipated future land use conditions in the watershed as determined from adopted local and regional land use plans. Along any watercourse draining more than one square mile, the above analyses shall be submitted to IDNR/OWR for approval. (Prior code § 28.04)
   E.   The BFE for any zone VE floodplain, and for a zone AE floodplain in an area subject to flooding effects from Lake Michigan, shall be the highest elevation specified on the FIRM among all flood zones affecting the proposed development. Where development is proposed to encroach upon a riverine Zone AE which is subject to flooding effects from Lake Michigan, the requirements of Section 15.68.070 of this Code shall apply to the entire floodplain. (Prior code § 28.04)
(MC-4-2021, § 2, Amended 8/3/2021; MC-5-2014 §§ 18, 19, 04/17/2014; MC-2-2008, Amended, 05/06/2008)