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  • Enclosure ceremony marks construction milestone at Next NGA West campus

    From the outside, it might look like the Next NGA West campus is ready for business. However, there is still a lot of work to be done before the National Geospatial Intelligence Agency’s new campus in St. Louis, Missouri, is ready for occupancy.

  • USACE lifts small craft advisory for Arkansas River

    LITTLE ROCK, Ark. – The U.S. Army Corps of Engineers is lifting the small craft advisory for the Arkansas River. Small craft advisories are issued when flows reach 70,000 cubic feet per second. While flows have receded, USACE officials urge boaters to always exercise caution when on the river.

  • USACE Holding C&SF Flood Resiliency Study Planning Meetings Jan. 11-12 in Fort Lauderdale

    The Jacksonville District of the U.S. Army Corps of Engineers (USACE) will hold a two-day planning charrette meeting for the Central and South Florida (C&SF) Flood Resiliency Study on Jan. 11-12 in Fort Lauderdale. Options for virtual and in-person attendance will be provided.

  • USACE reaches decision on Mid-Barataria Sediment Diversion permit

    The U.S. Army Corps of Engineers Mississippi Valley Division and New Orleans District proffered a Department of Army permit and Section 408 permission to the Coastal Protection and Restoration Authority of Louisiana (CPRA) for construction of the Mid-Barataria Sediment Diversion.

  • Reinforced Dune in Rockaways Provides Stronger Defense Against Flooding

    Rockaway Beach, a 10-mile-long peninsula facing the Atlantic Ocean in Queens, New York, a borough of New York City, has 850,000+ residents and a great deal of critical infrastructure in a small geographic area ─ schools, hospitals, nursing homes, mass transit lines, etc.

  • LAKE SHELBYVILLE BOUNDARY MAINTENANCE

    The U.S. Army Corps of Engineers is currently performing annual routine maintenance to the Government’s boundary line around Lake Shelbyville.

  • Lake Shelbyville Christmas Tree Recycling Program

    Extend your tree’s life by donating it for Fish Habitat Improvement Day at Lake Shelbyville.

  • Recreation Facility and Special Event Permit Fee Increases at Thurmond and Hartwell Lakes

    SAVANNAH, Ga. – The U.S. Army Corps of Engineers, Savannah District, announces fee increases for camping and shelter reservations as well as special event permits at the J. Strom Thurmond and Hartwell Lake Projects effective Jan. 1, 2023. Fee updates are a result of the Fiscal Year 2022 User Fee Comparability Study. The study was completed at both projects, performing a comparison of facilities, amenities, and fee structures with local, state, county, and private campgrounds and parks. Existing campground, shelter reservations and special event applications will be honored at the rate when originally submitted.

  • District prepares for the future one student at a time

    Three high school students working with the U.S. Army Corps of Engineers Transatlantic Middle East District (TAM) wrapped up a fall internship this week by presenting their capstone project to district leadership and staff.

  • Helicopter Rotor Blade Planform Optimization Using Parametric Design and Multi-Objective Genetic Algorithm

    Abstract: In this paper, an automated framework is presented to perform helicopter rotor blade planform optimization. This framework contains three elements, Dakota, ParBlade, and RCAS. These elements are integrated into an environment control tool, Galaxy Simulation Builder, which is used to carry out the optimization. The main objective of this work is to conduct rotor performance design optimizations for forward flight and hover. The blade design variables manipulated by ParBlade are twist, sweep, and anhedral. The multi-objective genetic algorithm method is used in this study to search for the optimum blade design; the optimization objective is to minimize the rotor power required. Following design parameter substitution, ParBlade generates the modified blade shape and updates the rotor blade properties in the RCAS script before running RCAS. After the RCAS simulations are complete, the desired performance metrics (objectives and constraints) are extracted and returned to the Dakota optimizer. Demonstrative optimization case studies were conducted using a UH-60A main rotor as the base case. Rotor power in hover and forward flight, at advance ratio 𝜇𝜇 = 0.3, are used as objective functions. The results of this study show improvement in rotor power of 6.13% and 8.52% in hover and an advance ratio of 0.3, respectively. This configuration also yields greater reductions in rotor power for high advance ratios, e.g., 12.42% reduction at 𝜇𝜇 = 0.4.