River IL

Trenkle Slough

Illinois • 40.2602, -88.5670

Hydrography profile Updated Dec 30, 2025

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USGS and NOAA data is for informational purposes. Source notes

Length

9 mi

15 km

Elevation

789′ → 692′

98 ft drop

Stream Order

Medium River

Slope

0.20%

10.7 ft/mi

Drainage

37 mi²

97 km²

Avg Flow

-- cfs

1.1 mph velocity

Path to Mouth

1,427 mi

2,296 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