Floodplain Management in Illinois - Illinois Department of Natural ...
Floodplain Management in Illinois - Illinois Department of Natural ...
Floodplain Management in Illinois - Illinois Department of Natural ...
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Approximate Flood Zones<br />
Approximate flood zones are<br />
drawn based on exist<strong>in</strong>g<br />
<strong>in</strong>formation, not eng<strong>in</strong>eer<strong>in</strong>g<br />
studies. FEMA checked with the<br />
U.S. Army Corps <strong>of</strong> Eng<strong>in</strong>eers, the<br />
U.S. Geological Survey, the State,<br />
local <strong>of</strong>ficials, and sources <strong>of</strong><br />
historic records. When exist<strong>in</strong>g<br />
<strong>in</strong>formation was lack<strong>in</strong>g, an<br />
approximation analysis was<br />
performed.<br />
Topographic maps can be used to estimate the Base Flood Elevation.<br />
If you need help determ<strong>in</strong><strong>in</strong>g the<br />
BFE, check with your community<br />
permit <strong>of</strong>fice, FEMA or IDNR/<br />
OWR. FEMA publication<br />
Manag<strong>in</strong>g <strong>Floodpla<strong>in</strong></strong><br />
Development <strong>in</strong> Approximate<br />
Zone A Areas (FEMA 265) is<br />
useful for eng<strong>in</strong>eers. The Ill<strong>in</strong>ois<br />
State Water Survey may be able<br />
to determ<strong>in</strong>e a BFE for a<br />
m<strong>in</strong>imal fee, (217) 333-0447.<br />
9<br />
ILLINOIS QUICK GUIDE
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