River IL MO

Big River

Illinois • 38.0099, -90.6858
Length
145 mi
234 km
Elevation
1,304′ → 410′
894 ft drop
Stream Order
6
Large River
Slope
0.12%
6.2 ft/mi
Drainage
965 mi²
2,501 km²
Avg Flow
983 cfs
1.4 mph velocity
Path to Mouth
347 mi
558 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

Access Sites on Big River

There are 5 boat ramps, launches, and public access points on Big River.