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  • Evaluation of a Permeable Dam as an Erosion Control Structure on Coca River, Ecuador

    Abstract: The effort performed here describes the process to evaluate the scour-protection performance of the proposed permeable dam. The US Engineer Research and Development Center, Coastal and Hydraulics Laboratory, built a 1:50 Froude scaled movable bed section model of the permeable dam structure and tested in a specialized flume that simulates regressive erosion propagation. Profiles were collected at various times to track the progression of the scour. Tests evaluated variations of the proposed structure, which included tetrapods, riprap, bridge piers, and longitudinal piles. For the various proposed alternatives, a total of six tests were conducted. The collected profiles show the ability or inability of each alternative and its associated performance. From this analysis, untethered tetrapods could not effectively arrest the local scour around the structure. However, large rock along with invert control stopped the regressive erosion and held the upstream grade.

  • NR 23-16: Reservoirs below summer pool elevations due to lack of rain

    NASHVILLE, Tenn. (June 6, 2023) – The U.S. Army Corps of Engineers Nashville District’s water managers report that two reservoirs in the Cumberland River Basin did not receive enough rain this spring to reach their traditional summer pool elevations.

  • Army Corps updates water release schedule for Francis E. Walter Dam

    The U.S. Army Corps Engineers’ Philadelphia District announced an update to the 2023 Francis E. Walter Dam recreation plan. With long-term forecasts showing little significant rainfall, USACE anticipates the four scheduled whitewater releases in June will be reduced and evenly allocated based on available water storage. The projected weekend flow during the reduced whitewater events in June will be announced the Wednesday prior to each event.

  • Hydropower capabilities set to surge on three rivers in Pittsburgh District

    Recently, Rye Development announced they would begin constructing four hydropower plants at lock and dam facilities on the Ohio, Monongahela, and Allegheny rivers. Once construction begins, it can take 24-36 months to complete a facility.

  • Juvenile salmon benefit from spring spill

    In April, the Northwestern Division, U.S. Army Corps of Engineers started spilling water on the Snake and Columbia rivers to help juvenile salmon migrate downstream. We met up with Julie Ammann, Reservoir Control Center chief at Bonneville Lock & Dam to check it out.

  • USACE and Harlan County Lake conduct community emergency preparedness exercise

    A tabletop exercise was conducted in Superior, Nebraska, on April 12, 2023, by local emergency management agencies for Harlan County Lake in conjunction with the Kansas City District, U.S. Army Corps of Engineers. The purpose of the exercise was to showcase the joint emergency preparedness between local communities around Harlan County Dam and USACE. In attendance at the tabletop exercise were representatives from the City of Superior, Nebraska, the Nebraska Game and Parks Commission, the Superior Volunteer Rescue Squad, Jewell County Emergency Management, Superior Fire Department, the National Weather Service and National Oceanic and Atmospheric Administration, Nuckolls County Emergency Management and the Jewell County Sheriff’s Office.

  • Rock protection project begins on portions of the Harlan County Dam

    The U.S. Army Corps of Engineers, Kansas City District has begun construction on a project placing a rock, also called riprap, overlay on portions of the upstream side of Harlan County Dam, near Republican City, Nebraska. This project will protect the dam from future wind and wave erosion.

  • USACE needs more engineers for its Dam Safety Production Center

    Dams are often synonymous with the U.S. Army Corps of Engineers. Responsible for more than 740 dams across the nation, USACE and its Dam Safety Program is responsible ensuring these structures provide many significant benefits to the nation while also reducing risks to people, property, and the environment. Central to this effort in the Southwestern Division are the engineers working for the Dam Safety Production Center.

  • Frigid temps increase power demand while Army dams balance needs

    With frigid temperatures and near record-setting snow accumulation in some areas of the Pacific Northwest, Army dams responded by producing power to keep the lights and heat on. The U.S. Army Corps of Engineers has 21 dams in the Columbia and Willamette river basins that ramp up power production to keep the grid stable during high demands.

  • Corps to release draft Mojave River Dam Master Plan revision for public comments

    The U.S. Army Corps of Engineers Los Angeles District will release the draft Mojave River Dam Master Plan revision on Jan. 27. The public is invited to view the information found at the following website: https://www.spl.usace.army.mil/Missions/Operations-Division/Mojave-River-Dam/.