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  • Army Corps shares update on Salem River dredging

    The U.S. Army Corps of Engineers’ Philadelphia District announced an update on a dredging and marsh restoration project at the mouth of the Salem River in New Jersey. Dredging operations will begin in early July as part of contract that was awarded to Cottrell Contracting Corporation in December 2023.

  • Army Corps awards contract for Delaware River maintenance dredging

    The U.S. Army Corps of Engineers’ Philadelphia District awarded a contract to Seaward Marine of Norfolk, Va. for $12.9 million to conduct maintenance dredging of portions of the federal channel of the Delaware River between Philadelphia and Trenton.

  • 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.

  • ERDC researchers complete collaborative effort to deliver results to district, stakeholders

    VICKSBURG, Miss. — Since 2019, U.S. Army Engineer Research and Development Center (ERDC) Research Biologists Dr. Burton Suedel and Justin Wilkens have been working with the U.S. Army Corps of Engineers (USACE) Honolulu District to answer questions about whether dredging-induced sediment plumes could affect corals.

  • Dredge Hurley returns after completing impressive season

    The Memphis District’s Dredge Hurley was welcomed home after returning to its home port, Ensley Engineer Yard in Memphis Harbor, Sunday morning, Nov. 21. Their homecoming signifies the end of yet another highly productive dredging season. The Hurley started this season May 3. And in just over six months’ time, the crew dredged several hundred miles of the Lower Mississippi River.     

  • Lake O Sediment Study Held Nov. 17

    The U.S. Army Corps of Engineers (USACE) Jacksonville District plans to execute a one-day deviation Nov. 17 as part of an ongoing sediment study by the South Florida Water Management District (SFWMD) and the U.S. Geological Survey (USGS).

  • Initial Survey of Microplastics in Bottom Sediments from United States Waterways

    Abstract: Given the reported extent of microplastics in the aquatic environment, environmentally relevant exposure information for sediments dredged by the US Army Corps of Engineers will lend context to the risks posed by this contaminant during dredging. We measured the occurrence, abundance, and polymer composition of microplastics in sediments collected from nine dredged waterways and two non-dredged reference areas. The number of particles in sediment samples ranged from 162 to 6110 particles/kg dry wt., with a mean of 1636 particles/kg dry wt. Fragments were the most prevalent shape observed among the 11 study sites (100% frequency of occurrence), followed by fibers (81%), spheres (75%), foams (38%) and films (34%). Based on analyses of chemical composition of the particles using Fourier transform infrared spectroscopy, polyethylene:propylene was the most common polymer type observed. Consistent with results presented by other investigators microplastic concentrations and polymer types in bottom sediments in this study were also aligned with the most widely used plastics worldwide.

  • Spatial Distribution and Thickness of Fine-Grained Sediment along the United States Portion of the Upper Niagara River, New York

    Abstract: Over 220 linear miles of geophysical data, including sidescan sonar and chirp sub-bottom profiles, were collected in 2016 and 2017 by the US Army Corps of Engineers and the US Fish and Wildlife Service in the upper Niagara River. In addition, 36 sediment grab samples were collected to groundtruth the geophysical data. These data were used to map the spatial distribution of fine-grained sediment, including volume data in certain locations, along the shallow shorelines of the upper Niagara River. Overall, the most extensive deposits were spatially associated with either small tributaries or with man-made structures that modified the natural flow of the system. Extensive beds of submerged aquatic vegetation (SAV) were also mapped. Although always associated with a fine-grained matrix, the SAV beds were patchy in distribution, which might reflect subtle differences in the grain size of the sediment matrix or could simply be a function of variations in species or growth. The maps generated from this effort can be used to guide sampling plans for future studies of contamination in fine-grained sediment regions.

  • Corps plans Depoe Bay dredging, after environmental assessment

    The U.S. Army Corps of Engineers will begin dredging Depoe Bay, Ore. to remove 2,000 cubic yards of material between September 13 and the end of the month. The work will take place for seven to 14 days and is an effort, with the City of Depoe Bay, to clean out the sediment catch basin.

  • Big Bertha heads to Benson Beach, battles erosion

    Off the coast of Oregon, Big Bertha moves in the water, inching toward land. Bertha, as her government creators to refer to it, is the result of three years of inter-agency planning. Her architects; some of whom work for the Portland District, U.S. Army Corps of Engineers; conscripted half of Portland District’s dredge fleet to scrape the river bottom and collect what was to become Bertha: a migrating mound of sand.