Upper Midwest Environmental Sciences Center

Select a Region - Open River - Upper Mississippi River

Select a Reach

Select a Pool - Reach 3 - Upper Mississippi River

Lock and Dam 26 to Grand Tower

Reach 2 map

The first region of the Open River extends from Lock and Dam 26 to Grand Tower.

Grand Tower to the confluence of the Ohio River

Grand Tower to the Ohio River is the Center's study reach for the Long Term Resource Monitoring Program.

Long Term Resource Monitoring Program Field Station - Open River


Open River is the term used to describe unimpounded reach of the Upper Mississippi River, downstream from the navigation dams.

Page Last Modified: April 3, 2018