The U.S. Army Corps of Engineers, St. Louis District, conducted a study of the flow and sediment transport response in the Salt Lake Chute reach of the Mississippi River between River Miles (RM) 143.0 and 134.0 approximately ten miles upstream of St. Genevieve, Missouri. This study was funded by the U.S. Army Corps of Engineers, St. Louis Districtís Lower Biological Opinion Program. The objective of the model study was to produce a report that outlined the results of an analysis of various river engineering measures intended to enhance the environmental diversity of the reach around Salt Lake Chute, including but not limited to, island creation and sandbar separation.
The purpose of this study was to find a solution to enhance the environmental diversity near the Salt Lake Chute complex and produce a report that communicates the results of the Hydraulic Sediment Response (HSR) model study.
The goals of this study were to:
- Investigate and provide analysis on the existing flow mechanics causing the sedimentation problems.
- Evaluate a variety of remedial measures utilizing an HSR model with the objective of identifying the most effective and economical plan to create a more diverse habitat in and around the Salt Lake Chute complex. In order to determine the best alternative, 3 criteria were used to evaluate each alternative.
- The alternative should enhance the environmental diversity of the sandbar located within the dike field near Salt Lake Chute and the side channel itself.
- The alternative should also enhance the environmental diversity of Salt Lake Chute.
- The alternative should maintain the navigation channel requirements of at least 12 foot of depth and 300 foot of width.
- Communicate to other engineers, river industry personnel, and environmental agency personnel the results of the HSR model tests and the plans for improvements.