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Illinois Department of
Natural Resources
| Most Recent Instantaneous Value Jan 29 | Min (1977) | 25th percen- tile | Median | Mean | 75th percen- tile | Max (1999) |
|---|---|---|---|---|---|---|
| -- unavailable -- | 6.60 | 57 | 120 | 230 | 276 | 1860 |
Gage height, feet |
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