RIVER GAUGE · ILLINOIS RIVER
Illinois River at Starved Rock Lock (tailwater)
La Salle County, Illinois
Water level440.57 ft
Flow3,300 cfs
Last readingSep 16, 2026, 4:00 PM UTC (last recorded)
Action449 ft
Minor flood450 ft
Moderate flood460 ft
Major flood465 ft
The past week
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What floods at each level
- 467.5 ft
North Utica Village Hall and North Utica Police Department are threatened.
- 464.5 ft
A few residences threatened in North Utica. IL-178 (Clark Street) threatened in North Utica.
- 463 ft
A couple structures threatened in North Utica.
- 461.5 ft
High water causes the Starved Rock Lock to shut down.
- 459 ft
Dee Bennet Road is threatened between Ottawa and Utica.
- 458 ft
High water levels begin to impact shipping interests along the river.
- 455 ft
High water causes the Starved Rock Hydroelectric Power Station to shut down.
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| Apr 18, 2013 | 467.81 ft | — |
| Sep 15, 2008 | 467.31 ft | — |
| May 18, 2020 | 465.86 ft | — |
When the water runs low
- 438.7
Low water levels begin to impact shipping interests along the river.
More on Illinois River
UpstreamIllinois River at Ottawa
DownstreamIllinois River near La Salle
Illinois River at Beardstown
Illinois River at Dresden Lock (tailwater)
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
Get an alert when Illinois River rises
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