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  • Numerical Modeling of Supercritical Flow in the Los Angeles River: Part II: Existing Conditions Adaptive Hydraulics Numerical Model Study

    Abstract: The Los Angeles District of the US Army Corps of Engineers is assisting the City of Los Angeles with restoration efforts on the Los Angeles River. The city wishes to restore portions of the channelized river to a more natural state with riparian green spaces for both wildlife and public recreation usage. The Los Angeles River provides an important role from a flood-control perspective, and functionality needs to be preserved when contemplating system modifications. This report details the development of an Adaptive Hydraulics numerical model capable of modeling this complex system consisting of both subcritical and supercritical flow regimes. The model geometry was developed to represent the existing conditions system for future usage in quantifying the impact associated with proposed restoration alternatives. Due to limited hydraulic data in the study area, an extensive model validation to observed data was not possible. A model was developed and simulated using the most appropriate input parameters. Given the lack of measured data for model validation, an extensive number of sensitivity simulations were completed to identify the most impactful parameters and quantify a reasonable level of confidence in the model results based on the uncertainty in the model inputs.

  • Many Celebrate Completion of Bois Brule Levee Project

    The U.S. Army Corps of Engineers, St. Louis District, leadership held a ribbon cutting ceremony to celebrate the closeout of the Bois Brule Levee Deficiency Correction Project Dec. 6, that provides resilient infrastructure for flood risk reduction within the 26,000 acres of agricultural lands, commercial businesses and homes in the area protected by the levee. Ongoing efforts led by St. Louis District’s interdisciplinary project delivery team with support from the project sponsor, the Bois Brule Levee Drainage and Levee District, have corrected underseepage and inadequate levee grade issues along the Bois Brule levee in Perry County, Missouri, and Randolph County, Illinois, located on the right descending bank of the Upper Mississippi River between river miles 94 and 111.

  • Ports and Port Stat Areas - Process Description

    The U.S. Army Corps of Engineers’ (USACE) Navigation and Civil Works Decision Support Center (NDC) is proud to offer a Geographic Information System (GIS) public web service for port areas.

  • Reviving Boise’s Barber Pool

    Efforts to restore the Barber Pool Conservation Area in Boise, Idaho, are discussed by U.S. Army Corps of Engineers, Walla Walla District personnel during a public scoping meeting held at Boise, Nov. 20, 2024. The initiative aims to rejuvenate the area’s ecosystems while enhancing public awareness and education. The meeting invited the public to hear more about the scope of the feasibility study and proposed efforts for restoration of the BPCA under the Continuing Authorities Program (CAP).

  • FEMA Strengthens Community-Driven Recovery through Updated National Disaster Recovery Framework

    FEMA updated the National Disaster Recovery Framework (NDRF), Updated NDRF, to include clear roles and responsibilities during declared disasters, ways to enhance collaboration across the whole community and practical resources to assist in recovery planning efforts.

  • MKARNS Nav Notice No. SWL 24-92 MPLD NavPass Closed

    Due to falling river elevations, the crest gate dam at Montgomery Point Lock and Dam (NM 0.5) is in operation and the navigation pass is closed. All vessels are required to pass through the lock until further notice.

  • Corps of Engineers releases flows at Reservation Dam, Lake Traverse

    The U.S. Army Corps of Engineers, St. Paul District, is releasing a small amount of flow at Reservation Dam to help maintain Lake Traverse water levels. Additionally, during the winter months White Rock Dam is slightly open to drain Mud Lake, located near Wheaton, Minnesota.

  • Roots for the Future: USACE plants bald cypress trees around Rough River Lake

    U.S. Army Corps of Engineers and volunteers took to the banks of Rough River Lake recently to

  • Corps of Engineers awards contract for a new lock chamber at Montgomery Locks and Dam

    The U.S. Army Corps of Engineers Pittsburgh District has awarded a nearly $770 million contract to construct a new 110-foot by 600-foot lock chamber at Montgomery Locks and Dam in Monaca, Pennsylvania.

  • ERDC-CRREL’s Fragoso named LUCI fellow

    The Department of Defense has named Dr. Anthony Fragoso, a research physicist at the U.S. Army Engineer Research and Development Center's (ERDC) Cold Regions Research and Engineering Laboratory (CRREL), a 2025 Laboratory-University Collaboration Initiative (LUCI) fellow.