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Title: Water Quality Sampling Report and Factual Determinations : Results of Sediment Sampling and Elutriate Testing at the Proposed Middle Decatur Shallow Water Habitat Project Site
Authors: United States. Army. Corps of Engineers. Omaha District
Keywords: Water quality
Aquatic habitats
Pallid sturgeon
Sedimentation and deposition
Environmental management
Environmental protection
Publisher: United States. Army. Corps of Engineers. Omaha District.
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. The intent of this report is to provide Factual Determinations of the potential water quality impacts of the proposed hydraulic dredging discharge at the Middle Decatur project site on the Missouri River. As defined in the Federal CWA and USACE Regulation No. 1110-2-8154, water quality is defined as the physical, chemical, and biological characteristics of water.
Description: Technical Report
Rights: Approved for Public Release; Distribution is Unlimited
Appears in Collections:Technical Reports