Working with the Corps of Engineers, Illinois DNR, and Missouri DOC,  the Rock Island Field Office has provided technical assistance  in the planning and design of a fish passage structure to be constructed through Mississippi River Lock and Dam 22 near Hannibal, Missouri. 

Biolgists strive to design a low maintenance, natural rock riffle that will allow fish to bypass the dam's locks and gates.

This is a high priority project under the Corps of Engineers Navigation and Environemtal Sustainability Program (NESP) which is awaiting authroization in the 2006 WRDA. 

The Carterville FRO is conducting pre-project fish monitoring at the location which will also help in project design.  RIFO biologists have also assisted the FRO in its sampling. 

Construction is not expected before 2008.