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  • Meet Our Team: Chicago Lock Operators

    Two of the U.S. Army Corps of Engineers Chicago District's best and brightest Chicago Lock operators: Richard Munoz Jr., and Justin Detert, discuss their careers with USACE, explain why they like what they do, and highlight facts about the lock.
  • 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.
  • A wreck reborn: Recovering the Civil War ironclad CSS Georgia from the Savannah River

    SAVANNAH, Ga. – As cities along the East Coast scramble to bolster their infrastructure and employ massive dredges to deepen their harbors, Savannah began its harbor expansion with a team of 10 people who used wire baskets to raise a handful of objects at a time.