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) | Most Recent Instantaneous Value Mar 6 | 25th percen- tile | Median | Mean | 75th percen- tile | Max (1994) |
|---|---|---|---|---|---|---|
| 1.10 | 17.9 | 22 | 37 | 58 | 69 | 402 |