Results of Sediment Sampling and Elutriate Testing at the Proposed Middle Decatur Shallow Water Habitat Project Site
Abstract
A project is being proposed to restore previously constructed 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 project. The District plans to restore connectivity to previously constructed SWH by cleaning out the original flow path and excavating a new inlet. The removal of newly deposited sediment will involve hydraulic dredging and it is proposed that the dredge spoil be discharged to the adjacent Missouri River. It is believed the sediment to be dredged was largely deposited during the Missouri River flood of 2011 and will be primarily sand with some silts and clays. An estimated 300,000 cubic yards of sediment/soil would be excavated and discharged to the Missouri River.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 2013
- Accession Number
- ADA617487
Entities
Organizations
- Omaha District, U.S. Army Corps of Engineers