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  • Army engineers finish fourth Army family housing tower in Daegu, South Korea

    For service members looking for a home away from home, a new family housing tower on Camp Walker will provide just that in South Korea. Representatives from the 19th Expeditionary Sustainment Command, 8th Army, U.S. Army Corps of Engineers – Far East District, U.S. Army Garrison – Daegu, and the first family to live in the tower participated in ribbon cutting to commemorate the facility opening on Feb. 29, 2024.

  • Computationally Efficient Modeling of Lightweight Expeditionary Airfield Surfacing Systems at Large Length Scales

    Abstract: Expeditionary airfield matting systems are lightweight, portable surfaces that enable the rapid deployment of infrastructure to support aircraft operations. Individual matting components are assembled via interlocking joints to construct arrays that serve as temporary aircraft operating surfaces. The paper outlines the homogenization of the AM2 portable airfield matting system and its interlocking mechanisms to permit computationally efficient analyses toward understanding mechanisms that influence the global behavior of these arrays and underlying subgrade during aircraft maneuvers. An equivalent orthotropic two-dimensional continuum was developed from finite element analysis of a detailed three-dimensional model and its flexural behavior was validated against experimental data and solid finite element models. Interlocking joints were characterized using node-to-node connector elements based on subscale finite element studies. Both components were implemented into a full-scale model representative of a typical test section, and responses to static high tire pressure aircraft loads were analyzed over a soil foundation representing a California bearing ratio of 6%, yielding promising agreement with experimental data. Results of this study reveal an inherent coupling between load transfer, mat deflection, and near-surface subgrade stress with dependence on tire location, mat core shear flexibility, and joint stiffness.

  • Analysis of Vegetation as Terrain: The “How” and “Why” of US Army Doctrine

    Abstract: There is a significant knowledge gap for Army doctrine concerning civilian research scientists. A relatively small number of soldiers make the transition from warfighter to research and development at the basic and applied levels. That number is even less when considering former warfighters that have applied Army doctrine in an operational or advanced Army schooling environment. This special report is intended to focus solely on the Army’s current capabilities and doctrinally defined processes to analyze vegetation as an essential component of the natural terrain. The objective of this report is to review current Army doctrine related to analysis of the vegetated terrain; to explore currently leveraged tactics, techniques, and procedures (TTPs); and identify valuable geospatial resources as they apply to military planning. For ease to readers unfamiliar with US Army doctrine, much of the referenced material is directly presented herein as tables and figures throughout the document and appendices (e.g., data sources, product examples, and glossary).

  • Waterway Engineering Applications of Automatic Identification System Data along the Mississippi River and at Lock Structures

    Abstract: The USACE, St. Louis District, is responsible for maintaining navigation channels along with multiple lock and dam structures on the Mississippi River, a vital inland waterway that carries millions of tons of commodities every year. Understanding commercial vessel traffic patterns is fundamental to informing decisions about construction projects and to efforts to improve communication to mariners. Automatic Identification System (AIS) data provides time-stamped and geo-referenced vessel position reports for most commercial vessels operating in the District’s area of interest. This paper describes how AIS data has been successfully used by St. Louis District waterway managers to (1) prevent conflicts with the navigation industry by revealing active fleeting areas that were under consideration for the construction of river training structures; and (2) identify changes in vessel approaches to a lock structure under different river flow conditions, providing operational information that could be used in future navigation alerts to mariners. This paper concludes with a list of suggested best practices for waterways managers who want to start, or expand, their use of AIS data.

  • Hurdles to Beneficial Use of Dredged Material: Root Cause Analysis

    Purpose: This technical note (TN) summarizes high points of an internal review of US Army Corps of Engineers (USACE) dredging and dredged material management practices, specifically beneficial use of dredged material (BUDM), that USACE manages from various navigation channels and ports around the nation.

  • Wallisville Lake Project staff clean up abandoned crab traps

    Each year, the Texas Parks and Wildlife Division (TPWD) closes crab fishing with wire mesh crab traps for ten days to give volunteers the opportunity to round up lost and abandoned traps. The closure is traditionally in late February or early March. Unattended traps “ghost fish” and kill blue crabs and other species unnecessarily and can also create a navigation hazard for boaters. According to a press release from TPWD, since the “Crab Trap Roundup” began 22 years ago, volunteers have removed 42,500 derelict traps, saving an estimated 700,000 blue crabs, a valuable natural resource. Each year at the Wallisville Lake Project, U.S. Army Corps of Engineers (USACE), Galveston District (SWG) personnel join the Crab Trap Roundup, while they patrol.

  • Portion of Neal Smith Trail to close for resurfacing at Saylorville Lake

    The U.S. Army Corps of Engineers, Rock Island District, announces a portion of the Neal Smith Trail at Saylorville Lake will temporarily close for resurfacing starting March 4th.

  • Girl Scouts spruce up Old Hickory Lake’s Environmental Study Area

    HENDERSONVILLE, Tenn. (Feb. 29, 2024) – Girl Scout Troop 296 joined other community volunteers and U.S. Army Corps of Engineers park rangers Saturday to spruce up and make minor improvements to the Environmental Study Area on the shoreline of Old Hickory Lake.

  • Corps of Engineers to reopen four locks and dams after winter maintenance

    ST. PAUL, Minn. – The U.S. Army Corps of Engineers, St. Paul District, will reopen several locks and dams in March that were closed for winter maintenance.

  • Average Garrison Dam releases declining to address downstream ice

    **Updated to note continued decline in releases toward 16,000 cfs ahead of the forecast schedule.** Fluctuations in temperatures in the Bismarck area have resulted in ice formation on the Missouri River and an ice jam just south of Bismarck. To reduce the threat of flooding, releases from Garrison Dam will be decreased today to an average of 22,000 cfs and tomorrow to 19,000 cfs. Releases may be adjusted as needed over the next several days based on the most up-to-date information.