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  • Environmental DNA (eDNA) Assays for the Detection of Ridgway’s Rail (Rallus obsoletus) in the United States

    Abstract: We designed two novel environmental DNA (eDNA) assays for the detection of Ridgway’s Rail (Rallus obsoletus), and successfully validated each assay using eDNA samples collected from the species’ known distribution within the United States. These assays add to the suite of tools available for the monitoring of this rare and secretive marsh bird, and may help to further elucidate its movement patterns as well as identify important migration corridors. Observed sensitivity of the assays indicates exceptional performance, with limits of detection at ≤ 8 copies of the target eDNA fragment per reaction. Our publication adds to the growing body of literature supporting eDNA surveys as viable tools for bird monitoring endeavors.

  • USACE Philly District supports Key Bridge collapse response

    In the aftermath of the collapse of the Francis Scott Key Bridge in late March 2024, the U.S. Army Corps of Engineers mobilized and began working with a unified team of federal, state, and local agencies with the goals of assessing the damage and, ultimately, restoring maritime navigation. The challenge has been historic as an estimated 50,000 short tons of steel and concrete fell across the total collapsed span of the bridge.

  • Headwaters Highlights: Surveyors measure a thousand times, take no shortcuts

    In the world of carpentry and construction, a famous proverb cautions laborers to "measure twice, cut once," but in the field of survey work, measuring twice is not enough.

  • Galveston District survey team conducts post dredge survey in Houston Shipping Channel

    USACE survey teams make a detailed map of the sea floor before a dredge operation to estimate the amount of material to be removed and after the dredge has completed work on the section to calculate and verify that the contract work was completed. If the dredge material is deposited offshore a survey team will make a third map of the sand added to the ocean floor.

  • U.S. Army Fort Wingate Depot Activity announces public interest survey for participation in re-activating a Restoration Advisory Board

    The U.S. Army Fort Wingate Depot Activity is conducting a survey to determine if there is enough public interest to re-activate the FWDA Restoration Advisory Board. The RAB provides a public venue for citizens to provide input on the decisions that are made by the Army to clean up the installation and meet the permit requirements.

  • USACE Archaeological Program

    When you think “archaeology” do you think “U.S. Army Corps of Engineers?” Probably not. Archaeology brings up images of Indiana Jones, dusty tombs and getting chased out of caverns by giant rolling boulders. Yet, despite this, USACE curates the second largest collection of cultural resources in the United States, second only to the Smithsonian Institution.

  • Pittsburgh District joins Duquesne University to form a stunning partnership

    Every organization says they are a learning organization, but the U.S. Army Corps of Engineers has taken its quest for innovation to a stunning level. During the 2021 recreation season, experts from the Pittsburgh District began a partnership with Duquesne University’s biology department. The goal was to test water quality within Crooked Creek Lake’s watershed called an “electrofishing survey,” which the corps had not used before.

  • District survey team helps maintain South Carolina waterways

    The Charleston District of the U.S. Army Corps of Engineers is responsible for 15 navigation projects along the South Carolina coast, stretching from Little River Inlet near the North Carolina border to Port Royal Harbor on South Carolina’s southern coast.

  • 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.

  • Pittsburgh District beams rivers with sonar to help navigation, occasionally finds lost vehicles

    The sonar helps provide the district with digital imagery that can detect water depth, erosion or obstructions that may impact navigation on the Pittsburgh rivers.