Watersheds - Mississippi River Valley
Mississippi River Valley
USGS Cataloging Unit
07060005, 07080101, 07080104, 07110001, 07110004, 07110009, 07140101, 07140105
The Mississippi River Valley in western Illinois is the land area drained by the main stem of the Mississippi River, excluding its major Illinois tributaries: the Rock, Illinois, Kaskaskia, Big Muddy, and Cache. Agriculture is the primary use of land within the watershed, although many grasslands and forests are present as well.