Refuge management analyses: levee alternatives at Clarence Cannon National Wildlife Refuge

This report documents the results of a workshop that examined levee alternatives at Clarence Cannon National Wildlife Refuge. This refuge is located along the Mississippi River, approximately 50 miles north of St. Louis. It was purchased primarily for waterfowl maintenance. A levee providing flood protection from the Mississippi River has broken four times since the Refuge was acquired in 1965. A number of alternatives have been proposed in response to the most recent break in 1983. Long term alternatives considered at the workshop included:

Improve the existing levee by raising the height approximately 2 ft.

Improve the existing levee by raising the height approximately 2 ft.

Maintain the levee at a lower elevation by including a spillway about 3 ft lower than the existing levee height.