River IL

Greenfield Bayou

Illinois • 39.3253, -87.5434

Reviewed mapped path Updated Dec 30, 2025

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USGS and NOAA data is for informational purposes. Source notes

Length

2 mi

3 km

Elevation

446′ → 445′

2 ft drop

Stream Order

Medium River

Slope

0.02%

1.2 ft/mi

Drainage

6 mi²

16 km²

Avg Flow

-- cfs

1.1 mph velocity

Path to Mouth

560 mi

901 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