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 (1956) | 25th percen- tile | Median | Mean | 75th percen- tile | Most Recent Instantaneous Value Jun 12 | Max (2015) |
|---|---|---|---|---|---|---|
| 0.30 | 19 | 39 | 74 | 92 | 189 | 1120 |