River IL

Ziegler Slough

Illinois • 41.1241, -91.0128

Hydrography profile Updated Dec 30, 2025

Checking mapped path coverage…

USGS and NOAA data is for informational purposes. Source notes

Length

12 mi

20 km

Elevation

537′ → 524′

13 ft drop

Stream Order

Stream

Slope

0.02%

1.0 ft/mi

Drainage

10 mi²

27 km²

Avg Flow

-- cfs

0.7 mph velocity

Path to Mouth

983 mi

1,581 km to ocean

Classification

Tributary

Mid-reach

Elevation Profile

Water Quality

Data from EPA Water Quality Portal (USGS, EPA, state agencies).

Data from USGS & NOAA for informational purposes only. More