RIVER GAUGE · ILLINOIS RIVER
Illinois River at Dresden Lock (tailwater)
Grundy County, Illinois
Water level484.09 ft
Flow—
Last readingSep 16, 2026, 4:00 PM UTC (last recorded)
Action491 ft
The past week
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What floods at each level
- 505.4 ft
High water levels cause Dresden Lock to shut down.
- 494.5 ft
High water levels begin to impact shipping interests along the river.
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| May 17, 2020 | 506.44 ft | — |
| Apr 18, 2013 | 506.38 ft | — |
| Sep 14, 2008 | 506.35 ft | — |
When the water runs low
- 481.2
Low water levels begin to impact shipping interests along the river.
More on Illinois River
DownstreamIllinois River at Morris
Illinois River at Beardstown
Illinois River at Hardin
Illinois River near Havana
Illinois River near Henry
Illinois River near La Salle
Illinois River at Marseilles Lock (tailwater)
Illinois River at Morris
Illinois River at Meredosia
Illinois River at Marseilles
Illinois River at LaGrange Lock and Dam
Get an alert when Illinois River rises
Save this gauge in the free StormCast app and pick the level that matters to you. Your phone goes off when the water gets there.
