One-Hundred and Five-Hundred Year Floodzones for Unincorporated Areas [Illinois]
Description:
Statewide polygon feature class of 100 and 500 year flood zones for unincorporated areas of Illinois as indicated on Federal Emergency Management Agency (FEMA) National Flood Insuranc Program (FIRM) maps and Flood Hazard Boundary maps. ISWS.
Creator:
Illinois State Geological Survey and Illinois State Water Survey