• The Base of the Future taking shape at Tyndall AFB

    Like a phoenix rising from the ashes, Tyndall Air Force Base’s rebuild in Panama City, Florida, is taking shape. After Hurricane Michael nearly destroyed the base in 2018, the U.S. Army Corps of Engineers, Mobile District, was tasked with rebuilding it, which is home to the U.S. Air Force’s next-generation aircraft fighter, the F-35 Lightning II.
  • MKARNS Nav Notice No. SWL 25-12 Lock 4 Closure

    Mariners are advised that Emmett Sanders (No. 4) NM 66.0 will be closed to traffic beginning at 8:00 a.m. until 4:00 p.m. on February 26, 2025. The lock closure is required to facilitate ongoing work on the hydraulic system.
  • Birds Not in Flight: Using Camera Traps to Observe Ground Use of Birds at a Wind-Energy Facility

    Abstract: Camera trapping is increasingly used to collect information on wildlife occurrence and behaviour remotely. This provides insights into habitat use by species of interest and gathers information on non-target species. We implemented ground-based camera trapping to investigate behaviours of ground-dwelling birds and to monitor activities of Agassiz’s desert tortoises at their self-constructed burrows in a wind-energy facility near Palm Springs, California. While doing so, we collected data on numerous burrow commensals, including birds. Monitoring from late spring to mid-autumn showed regular use of tortoise burrows by 12 species of birds, the most abundant being the rock wren. Birds appeared to use the interior or vicinity of burrows for gathering nesting material, displaying, feeding, dust bathing and other activities. Of the species observed, 10 are known to be occasional casualties of turbine-blade strikes. Using camera traps focused at ground level can be a useful tool in avian conservation effort for measuring bird presence, activity and behaviour in altered habitats. Acquiring data over the long term by using ground-based monitoring with camera traps could add to our understanding of avian behaviour and habitat use in relation to wind-energy infrastructure and operations, and help determine the vulnerability of avifauna utilizing the area.
  • Representation of Live-Fire Energetic Residues from Insensitive Mortar Munitions Using Command-Detonation Testing

    Abstract: Command detonation is critical for testing munitions early in the acquisition process, however its representation of energetic residues produced during live fire has not been assessed. Energetic residue deposition rates were measured on snow from live fire of 60 mm and 81 mm IMX-104 mortar munitions and then compared results with previous command-detonation tests of the same munitions. Mean live-fire deposition rates of IMX-104 compounds were: 3800 mg NTO, 34 mg DNAN, 12 mg RDX, and 1.9 mg HMX per 60 mm cartridge (n = 9); and 8000 mg NTO, 60 mg DNAN, 20 mg RDX, and 2 mg HMX per 81 mm cartridge (n = 13). The predominant residue compound NTO was accurately estimated by command detonation for the 60 mm munition but was significantly underestimated for the 81 mm munition. The minor residues of DNAN and RDX were relatively well estimated by command detonation for the 81 mm munition (p = 0.07 and p= 0.014, respectively), but both were significantly underestimated (p < 0.0001) for the 60 mm munition. Despite some of these differences, the ability demonstrated here for command detonation to predict live-fire residue deposition rates to the correct order-of-magnitude supports its utility in assessing environmental impact.
  • U.S. Army Corps of Engineers Deploys the Murden for Dredging Operations in Lake Montauk

    NEW YORK – The U.S. Army Corps of Engineers (USACE), New York District, is deploying the Wilmington District, shallow draft dredge, Murden, to Lake Montauk to conduct vital dredging operations aimed at maintaining safe and efficient navigation for commercial and recreational vessels.
  • Huntington District Monitoring Recent Flooding

    HUNTINGTON, W.Va. - The U.S. Army Corps of Engineers, Huntington District is monitoring water from
  • Public Workshop for the Lake Dardanelle Shoreline Management Plan Update cancelled due to inclement weather

    The U.S. Army Corps of Engineers Little Rock District is cancelling the public workshop scheduled for tonight, Feb. 18, due to inclement weather.
  • Army Corps refilling Lake Washington for summer

    U.S. Army Corps of Engineers officials began Lake Washington’s annual summer refill operations Feb. 15. Water managers are targeting a typical annual refill of the lake to elevation 22 feet this spring, to help meet increased summer water use and provide water necessary for fish passage, navigation and salinity control.
  • Eugene Gibbs: “There is an Art and Science to Contracting”

    After more than 16 years and nine moves, Eugene Gibbs, Contracting Officer (KO), U.S. Corps of Engineers – Far East District, has cultivated an expansive and a detailed portfolio in the contracting industry. Now, he is ready to share his experience with the next generation of contractors and engineers.
  • Corps works to restore Cumberland River Basin Flood storage, reduce risk

    The U.S. Army Corps of Engineers Nashville District is implementing a phased approach to restore reservoir storage capacity in the Cumberland River Basin while maintaining flood risk management.