The Mississippi River

The Mississippi River is divided into:
The Upper Mississippi
The Middle Mississippi
The Lower Mississippi

The Upper Mississippi

The Upper Mississippi is divided into:
The headwaters, from the source to Saint Anthony Falls in Minneapolis, Minnesota
A navigable channel, formed by a series of man-made lakes between Minneapolis and St. Louis, Missouri

The Coon Rapids Dam

The Middle Mississippi

The Lower Mississippi

Watershed
The Mississippi River has the world's fourth largest
drainage basin
(«watershed» or «catchment»)