River IL

Elm Island Ditch

Illinois • 41.4144, -89.8750

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

622′ → 605′

17 ft drop

Stream Order

Medium River

Slope

0.10%

5.2 ft/mi

Drainage

8,099 mi²

20,977 km²

Avg Flow

-- cfs

1.1 mph velocity

Path to Mouth

1,191 mi

1,917 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