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  • 100-Year Floodplain in Illinois


  • 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.

Originally Deposited as: 11824

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Language(s): EN-English

Volume or Year: 2009
Number or Issue: August 6

Date Created: 12 18 2009
Date Last Modified: 12 18 2009

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1. 100-Year Floodplain in Illinois (20091221205059_floodzone09.pdf).
Document Size:3768009 Software: Acrobat Distiller Version: 9.2.0 (Windows)