Results of Sediment Sampling and Elutriate Testing at the Proposed Middle Decatur Revetment Shallow Water Habitat Project Site
ARMY ENGINEER DISTRICT OMAHA NE
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A project is being proposed to construct shallow-water habitat SWH along Middle Decatur Bend of the Missouri River in Burt County, Nebraska. The U.S. Army Corps of Engineers USACE is constructing SWH along the lower Missouri River downstream of Gavins Point Dam to mitigate aquatic habitat lost from past bank stabilization and channelization, and enhance habitat for the endangered pallid sturgeon Scaphirhynchus albus population along the lower Missouri River. The Omaha District District is referring to the proposed project as the Middle Decatur Revetment project. The District plans to construct SWH by excavating material behind an existing revetment. The removal of deposited sediment will involve hydraulic dredging and it is proposed that the dredge spoil be discharged to the adjacent Missouri River. It is believed that some of the sediment to be dredged was newly deposited during the Missouri River flood of 2011 and will be primarily sand with some silts and clays. An estimated 264,000 cubic yards of sedimentsoil would be excavated and discharged to the Missouri River.
- Water Pollution and Control
- Environmental Health and Safety