River IL

Plass Ditch

Illinois • 38.5294, -87.5283

Reviewed mapped path Updated Dec 30, 2025

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USGS and NOAA data is for informational purposes. Source notes

Length

5 mi

7 km

Elevation

408′ → 399′

8 ft drop

Stream Order

Large River

Slope

0.04%

1.9 ft/mi

Drainage

47 mi²

121 km²

Avg Flow

-- cfs

1.8 mph velocity

Path to Mouth

488 mi

785 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