Illinois River depth map (nautical chart)

The marine chart shows water depth and hydrology on an interactive map. The source of the Illinois River is confluence of the Kankakee and Des Plaines Rivers. The mouth of is the Mississippi River near Grafton. Average discharge: 23,280 cu ft/s (659 m3/s).

Type

River

Location

Illinois

Length

273 mi (439 km)

Basin size

28,070 sq mi (72,700 km2)

Largest cities

Peoria, Peru, Ottawa