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Chapter 28 - Special Flood Hazard Area Development Regulations
Division 6 - Preventing Increased Flood Heights and Resulting Damages

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SEC. 28.6. - PREVENTING INCREASED FLOOD HEIGHTS AND RESULTING DAMAGES. Within the floodway identified on the Flood Insurance Rate Map for McLean County, Illinois, and Incorporated Areas, and within all other floodplains where a floodway has not been delineated, the following standards shall apply:

  1. except as provided in SEC. 28.6.B, no development shall be allowed which, acting in combination with existing and anticipated development, will cause any increase in flood heights or velocities or threat to public health and safety. The following specific development activities shall be considered as meeting this requirement:
     
    1. Barge fleeting facilities meeting the conditions of IDNR/OWR Statewide Permit No. 3;
       
    2. Aerial utility crossings meeting the conditions of IDNR/OWR Statewide Permit No. 4;
       
    3. Minor boat docks meeting the conditions of IDNR/OWR Statewide Permit No. 5;
       
    4. Minor, non-obstructive activities meeting the conditions of IDNR/OWR Statewide Permit No 6;
       
    5. Outfall structures and drainage ditch outlets meeting the conditions of IDNR/OWR Statewide Permit No. 7;
       
    6. Underground pipeline and utility crossings meeting the conditions of IDNR/OWR Statewide Permit No. 8;
       
    7. Bank stabilization projects meeting the conditions of IDNR/OWR Statewide Permit No. 9;
       
    8. Accessory structures and additions to existing residential buildings meeting the conditions of IDNR/OWR Statewide Permit No. 10;
       
    9. Minor maintenance dredging activities meeting the conditions of IDNR/OWR Statewide Permit No. 11; and
       
    10. Any development determined by IDNR/OWR to be located entirely in a flood fringe area.
       
  2. Other development activities not listed in (a) may be permitted only if:
     
    1. a permit has been issued for the work by IDNR/OWR (or written documentation is provided that an IDNR/OWR permit is not required); and
       
    2. sufficient data has been provided to FEMA when necessary, and approval obtained from FEMA for a revision of the regulatory map and base flood elevation.