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•100-Year Floodplain in Illinois (1)
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Title:  

100-Year Floodplain in Illinois

 
 Volume/Number:  2009 August 6 
 Issuing Agency:   
 Description:  Map of 100-Year floodplain in Illinois. The 100-year floodplain represents that portion of the topography that would be inundated during a flood event which has a 1% chance of occurrence in any given year. The mapped 100-year floodplain area represents the best available data as of July 2009. 
 Date Created:  12 18 2009 
 Agency ID:   
 ISL ID:  000000023235   Original UID: 11824 FIRST WORD: 100