River IL AR

Illinois River

Illinois • 40.4735, -89.7575

Length

241 mi

387 km

Elevation

460′ → 419′

41 ft drop

Stream Order

9

Major River

Slope

0.00%

0.2 ft/mi

Drainage

27,507 mi²

71,243 km²

Avg Flow

-- cfs

3.0 mph velocity

Path to Mouth

1,438 mi

2,314 km to ocean

Classification

Tributary

Mid-reach

Elevation Profile

Data from USGS & NOAA for informational purposes only. More

Monitor