Illinois River At Marseilles, Il Realtime Data
ILLINOIS RIVER AT MARSEILLES, IL
Realtime Data • Report • Conditions
10,800
Discharge (cfs)
13.0
Gauge Height (ft)
USGS 05543500
Streamflow discharge was last observed at 10,800 cfs, and a gauge height of 12.96 feet.
With the
% decrease since yesterday,
the streamflow average over the past 10 days is 16,203 .
Weather today, Tomorrow,
The Dresden Island and Marseilles Dams also impact the flow. Seasonally, the river experiences high flows in the spring due to snowmelt and precipitation, and low flows in the summer and fall. Interestingly, the river is home to several rare and endangered species, including the Hine's Emerald dragonfly and the Alligator Snapping Turtle. Additionally, the river was once a popular site for paddlewheel steamboats and was even featured in Mark Twain's book "Life on the Mississippi."
July 14, 2026
| Elevation | 459.0 ft |
| Last Updated | |
| Gage height, ft | 12.96 ft |
| Streamflow, ft³/s | 10800.0 ft3/s |
| Percent of Normal | 116% |
| Year Over Year Average | 9,235 cfs |
| 24hr Flow Prediction | cfs |
| Maximum Recorded | 104,000 cfs |
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