Creek IL

Coates Creek

Illinois • 39.3307, -90.4476

Hydrography profile Updated Dec 30, 2025

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USGS and NOAA data is for informational purposes. Source notes

Length

8 mi

12 km

Elevation

603′ → 442′

161 ft drop

Stream Order

Medium River

Slope

0.41%

21.4 ft/mi

Drainage

14 mi²

36 km²

Avg Flow

-- cfs

0.9 mph velocity

Path to Mouth

1,255 mi

2,020 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