Within any floodway identified on the countywide Flood Insurance Rate Map, and within all other floodplains where a floodway has not been delineated, the following standards shall apply:
(A) Except as provided in division (B) of this section, 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) Bridge and culvert crossings of streams in rural areas meeting the flowing conditions of the Illinois Department of Natural Resources, Office of Water Resources Statewide Permit Number 2;
(2) Barge fleeting facilities meeting the following conditions of IDNR/OWR Statewide Permit Number 3: The permit is only applicable when deadmen, pier cells, or other similar anchorage devices have been permitted by the U.S. Army Corps of Engineers.
(3) Aerial utility crossings meeting the following conditions of IDNR/OWR Statewide Permit Number 4;
(4) Minor boat docks meeting the following conditions of IDNR/OWR Statewide Permit Number 5;
(5) Minor, non-obstructive activities meeting, the following conditions of IDNR/OWR Statewide Permit Number 6. The following activities (not involving fill or positive change in grade) are covered by this permit;
(6) Outfall structures and drainage ditch outlets meeting the following conditions of IDNR/OWR Statewide Permit Number 7;
(7) Underground pipeline and utility crossings meeting the conditions of IDNR/OWR Statewide Permit Number 8;
(8) Bank stabilization projects meeting the conditions of IDNR/OWR Statewide Permit Number 9;
(9) Accessory structures and additions to existing residential buildings meeting the conditions of IDNR/OWR Statewide Permit Number 10;
(10) Minor maintenance dredging activities meeting the following conditions of IDNR/OWR Statewide Permit Number 11;
(11) Bridge and culvert replacement structures and bridge widening meeting the following conditions of IDNR/OWR Statewide Permit Number 12;
(12) Temporary construction activities meeting the following conditions of IDNR/OWR statewide Permit Number 13; and
(13) Any development determined by IDNR/OWR to be located entirely within a flood fringe area shall be exempt from state floodway permit requirements.
(B) Other development activities not listed in division (A) of this section may be permitted only if:
(1) Permit has been issued for the work by IDNR/OWR (or written documentation is provided that an IDNR/OWR permit is not required); or
(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.
(Ord. 1302, passed 11-7-07; Am. Ord. 1447, passed 7-6-11)