River IL

Westport Chute

Illinois • 39.1737, -90.7220

Hydrography profile Updated Dec 30, 2025

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USGS and NOAA data is for informational purposes. Source notes

Length

8 mi

13 km

Elevation

438′ → 433′

6 ft drop

Stream Order

Major River

Slope

0.01%

0.7 ft/mi

Drainage

236,292 mi²

611,994 km²

Avg Flow

-- cfs

4.0 mph velocity

Path to Mouth

463 mi

744 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