Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/48292
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dc.contributor.authorUnited States. Army. Corps of Engineers. Omaha District-
dc.date.accessioned2024-03-11T18:23:49Z-
dc.date.available2024-03-11T18:23:49Z-
dc.date.issued2013-07-
dc.identifier.urihttps://hdl.handle.net/11681/48292-
dc.descriptionTechnical Reporten_US
dc.description.abstractA 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.en_US
dc.description.sponsorshipUnited States. Army. Corps of Engineers.en_US
dc.description.tableofcontents1 Background information ....................................................................................................................... 4 1.1 Project Description........................................................................................................................ 4 1.2 Project Location............................................................................................................................ 4 1.3 Section 404 Permitting Requirements – 404(b)(1) Guidelines ..................................................... 4 1.4 Section 401 Water Quality Certification....................................................................................... 7 1.5 Water Quality Standards Classifications of the Missouri River ................................................... 7 1.6 Use of Sediment/Soil Analysis, Elutriate Testing, and Ambient Missouri River Water Quality Data for Factual Determinations...................................................................................... 8 2 Site-Specific Water Quality Concerns .................................................................................................. 8 2.1 Fish Consumption Advisory ......................................................................................................... 8 2.2 Section 303(d) Impaired Waters Listings ..................................................................................... 8 2.3 Nutrients........................................................................................................................................ 9 2.4 National Research Council of the National Academies Assessment of Missouri River Water Quality and Sediment Management............................................................................................ 10 3 Sampling and Analysis Methods......................................................................................................... 11 3.1 Quality Control Plan ................................................................................................................... 11 3.2 Collection of Sediment/Soil Samples ......................................................................................... 13 3.3 Collection of Receiving Water.................................................................................................... 13 3.4 Elutriate Testing.......................................................................................................................... 14 4 Results................................................................................................................................................. 16 4.1 Receiving Water Field Measurements ........................................................................................ 16 4.2 Particle Size Analysis ................................................................................................................. 16 4.3 Physiochemical Analysis of Sediment/Soil and Receiving Water Samples and Elutriate Testing Results ........................................................................................................................... 16 5 Water Quality Factual Determinations ............................................................................................... 43 5.1 Physical Substrate Determinations.............................................................................................. 43 5.2 Suspended Particulate/Turbidity Determinations ....................................................................... 45 5.3 Contaminant Determinations ...................................................................................................... 46 5.4 Proposed Disposal Site Determinations...................................................................................... 55 5.5 Summary of Water Quality Factual Determinations................................................................... 56 6 References........................................................................................................................................... 61 Attachment 1. Sampling and Analysis Plan for 2013 Elutriate Testing at the Middle Decatur Shallow Water Habitat Site. Attachment 2. Particle Size Distribution Reports for Sediment/Soil Samples Collected at the Proposed Middle Decatur Shallow Water Habitat Site. Attachment 3. Laboratory Report of Results for Analysis of Collected Sediment/Soil, Receiving Water, and Prepared Pre-Elutriate and Elutriate Samples at the Proposed Middle Decatur Shallow Water Habitat Site.-
dc.format.extent99 pages / 1.83 MB-
dc.format.mediumPDF-
dc.language.isoen_USen_US
dc.publisherUnited States. Army. Corps of Engineers. Omaha District.en_US
dc.rightsApproved for Public Release; Distribution is Unlimited-
dc.sourceThis Digital Resource was created in Microsoft Word and Adobe Acrobat-
dc.subjectWater qualityen_US
dc.subjectWater--Samplingen_US
dc.subjectAquatic habitatsen_US
dc.subjectPallid sturgeonen_US
dc.subjectSedimentation and depositionen_US
dc.subjectEnvironmental managementen_US
dc.subjectEnvironmental protectionen_US
dc.titleWater Quality Sampling Report and Factual Determinations : Results of Sediment Sampling and Elutriate Testing at the Proposed Middle Decatur Shallow Water Habitat Project Siteen_US
dc.typeReporten_US
Appears in Collections:Technical Reports