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  • 22-054 Corps invites public comments on proposed Lower Snake River Channel Dredging project

    WALLA WALLA, Wash. – The U.S. Army Corps of Engineers, Walla Walla District, invites your comments on the Draft Finding of No Significant Impact (FONSI) and the Lower Snake River Channel Maintenance Immediate Need Dredging for Commercial Navigation Environmental Assessment (EA).

  • Impacts of Granular Activated Carbon (GAC) on Erosion Behavior of Muddy Sediment

    Abstract: Recent policy changes regarding the placement of dredged material have encouraged the USACE to increase its beneficial use (BU) of the sediments dredged from the nation’s navigation channels. A good portion of this material is fine grained (<63 mm), which traditionally has limited use in BU applications, in part due to its dispersive nature. A need exists to evaluate the potential of stabilizing and using fine-grained sediment (FGS) in BU projects. Previous studies have shown the addition of granular sand to FGS reduces the mobility of the bed. The potential of using Granular Activated Carbon (GAC), an amendment commonly used in environmental capping involving FGS, as a similar bed stabilizing material was explored in this study. A series of laboratory erosion tests using Sedflume were performed on FGS-GAC mixtures that ranged from 5% to 20% GAC by mass. Results suggested that GAC content ≤10% had no influence on the stability of the bed while GAC content ≥15% appeared to reduce both critical shear stress (τcr) and erosion rate (n). However, when compared to control cores, those without GAC, clear evidence of bed stabilization of FGS from the addition of GAC was not observed.

  • U.S. Army Corps of Engineers Awards Contract for Dunkirk Harbor Dredging

    The U.S. Army Corps of Engineers (USACE), Buffalo District has awarded a $618,332 contract to Michigan-based, Dean Marine & Excavating, Inc., July 6, 2022, to conduct dredging of the federal navigation channel in Dunkirk Harbor.

  • USACE Navigation Sediment Placement: An RSM Program Database (1998 – 2019)

    Abstract: This US Army Corps of Engineers, Regional Sediment Management, technical note describes a geodatabase of federal coastal and inland navigation projects developed to determine the extent to which RSM goals have been implemented across the USACE at the project and district levels. The effort 1) quantified the volume of sediment dredged from federal navigation channels by both contract and USACE-owned dredges and 2) identified the placement type and whether sediment was placed beneficially. The majority of the dredging data used to populate the geodatabase were based on the USACE Dredging Information System DIS database, but when available, the geodatabase was expanded to include more detailed USACE district-specific data that were not included in the DIS database. Two datasets were developed in this study: the National Dataset and the District-Specific and Quality-Checked Dataset. The National Dataset is based on statistics extracted from the combined DIS Contract and Government Plant data. This database is a largely unedited database that combined two available USACE datasets. Due to varying degrees of data completeness in these two datasets, this study undertook a data refinement process to improve the information. This was done through interviews with the districts, literature search, and the inclusion of additional district-specific data provided by individual districts that often represent more detailed information on dredging activities. The District-Specific and Quality-Checked Database represents a customized database generated by this study. An interactive web-based tool was developed that accesses both datasets and displays them on a national map that can be viewed at the district or project scale

  • National Sediment Placement Data Viewer Users Guide

    Purpose: This US Army Corps of Engineers (USACE) Regional Sediment Management (RSM) technical note serves as a user’s guide for the RSM National Sediment Placement Data Viewer. This application was created utilizing over 20 yr* of detailed and verified USACE dredging data, giving users an interactive web-based tool that takes these datasets and displays them on a national map, viewable at the district or project scale. The Data Viewer will quantify the total cubic yards dredged, disposed, and/or beneficially used based on the user selected parameters. Detailed information on the datasets utilized and the verification processes followed to create this application can be found in ERDC/TN RSM-22-4, USACE Navigation Sediment Placement: An RSM Program Database (1998 – 2019) (Elko et al. 2022). This technical note attempts to define each of the inputs/outputs given from the Data Viewer and then provide a step-by-step example of utilizing the Data Viewer, accessed here: https://www.arcgis.com/apps/MapSeries/index.html?appid=0ea8fc0a956f46068428c862e7497233

  • Keeping the river open for business, dredging contract awarded

    The Memphis District U.S. Army Corps of Engineers is responsible for keeping the Mississippi River open for commercial navigation year-round. One way the district does this is through contract dredging, which keeps the river channel at a depth that allows the river barge industry to dependably transport goods up and down the river. Ensuring the district delivers on this charge, the Memphis District recently awarded a contract in the amount of $7,335,450 to Great Lakes Dredge and Dock, LLC for the rental of a 24-inch hydraulic cutterhead dredge, discharge pipe, and attendant plant. The contract was awarded June 2, 2022, with an anticipated completion date of Feb. 28, 2023.

  • Corps extends public comment period for PolyMet’s Northmet Mine permit

    The U.S. Army Corps of Engineers, St. Paul District, is providing an additional 15 days for the public to comment on the Clean Water Act Section 401(a)(2) action related to the PolyMet/NorthMet mining project. Public comments may be submitted until June 30.

  • U.S. Army Corps of Engineers announces signing of Chief’s Report for New York & New Jersey Harbor Deepening and Channel Improvements Study

    NEW YORK — Lt. Gen. Scott A. Spellmon, Commanding General, of the U.S. Army Corps of Engineers, and 55th Chief of Engineers, recently signed the New York & New Jersey Harbor Deepening and Channel Improvements (NY&NJHDCI) Chief's Report. The Port of New York and New Jersey is the busiest container port on the East and Gulf Coasts and the second busiest container gateway in the United States. The Chief’s Report recommends bend widenings and channel deepening in the existing -50 feet Mean Lower Low Water (MLLW) datum channels; and in Ambrose Channel, currently -58 feet MLLW.

  • Corps seeks comments on updated Pool 6 dredged material management plan

    The U.S. Army Corps of Engineers, St. Paul District, released its updated Mississippi River Pool 6 draft dredged material management plan and Environmental Assessment, or EA, today, June 14.

  • Jacksonville District continues beach placement on Indian Beach Park and Allison Beach segment of Miami Beach shoreline protection project

    Jacksonville, Fla. (Aug. 1, 2022) – The U.S. Army Corps of Engineers Jacksonville District, continues work on the Miami Beach Renourishment project that distributes sand placement at the southern end of the Indian Beach Park and Allison Beach. The project started June 13, 2022.