River IL

Wardens Slough

Illinois • 37.5937, -88.1270

Hydrography profile Updated Dec 30, 2025

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USGS and NOAA data is for informational purposes. Source notes

Length

3 mi

5 km

Elevation

339′ → 327′

12 ft drop

Stream Order

Medium River

Slope

0.07%

3.7 ft/mi

Drainage

34 mi²

87 km²

Avg Flow

-- cfs

0.9 mph velocity

Path to Mouth

114 mi

183 km to ocean

Classification

Tributary

Mid-reach

Elevation Profile

Water Quality

Data from EPA Water Quality Portal (USGS, EPA, state agencies).

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Data from USGS & NOAA for informational purposes only. Read source and safety notes

Rain Radar