Illinois Department of
Natural ResourcesStreamflow information saves lives and protects property during floods. Information on the streamflow in the Nation's rivers also helps to ensure adequate water resources for a healthy environment and economy. The U.S. Geological Survey (USGS) operates and maintains a national network of over 7,000 streamgages.
| Min (1957) | 25th percen- tile | Most Recent Instantaneous Value Feb 22 | Median | 75th percen- tile | Mean | Max (1985) |
|---|---|---|---|---|---|---|
| 1.20 | 14 | 14.6 | 40 | 71 | 87 | 1390 |