• 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.
  • Corps of Engineers increases operations as water levels rise across the Cumberland River Basin

    With continued heavy rainfall and rising river levels, the U.S. Army Corps of Engineers Nashville District is increasing its operational response to manage water releases and minimize flood risks along the Cumberland River and its tributaries.
  • UPDATE: Arkabutla Dam Emergency - Lake Levels Expected to Surpass 220 Feet as Spring Flood Season Begins

    Arkabutla, Miss. – Recent storms have brought significant rainfall to the Arkabutla Lake area, pushing lake levels above 210 feet and prompting expectations that they will exceed 220 feet within the next two weeks and is dependent on where and when the rain falls. Pool levels at Arkabutla Dam, located in DeSoto and Tate Counties in Northwest Mississippi, can fluctuate quickly especially during the rainy season.
  • MKARNS Nav Notice No. SWL 25-11 Lock 9 Tow Haulage Planned Outage

    The tow haulage equipment at Ormond Lock (No. 9) NM 176.9 will be taken out of service beginning February 15, 2025, to facilitate required work on the lock shelters. Double cut tows will have to be locked the conventional way (without the use of tow haulage). A follow up notice will be distributed when the tow haulage equipment is back in service.