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  • USACE Announces Updated Mask Guidance for all DoD Installations and Other Facilities

    The U.S. Army Corps of Engineers Fort Worth District continues to take measures to assist public health efforts to contain the spread of COVID-19 and protect USACE employees and visitors.

  • Visitor Centers closed as Corps of Engineers take precautions for visitors

    Please observe and adhere to public health warning signage that may be posted around recreation areas such as public restrooms or shelter houses.

  • Huntsville Center reinstates full masking requirements

    This decision is in line with the Secretary of Defense memo on Updated Mask Guidance for all DoD Installations and Other Facilities, dated July 28.

  • Officials invite public comment on Rathbun Lake fall releases

    In 2016 in response to stakeholder input, the Corps of Engineers revised its operating guidance for Rathbun Lake. The new guidance allows for an annual opportunity, every autumn, for the lake to schedule a release of water to benefit state and privately managed conservation and recreational areas downstream in the Chariton watershed.

  • Corps to host three open houses onboard the Motor Vessel Mississippi

    ST. PAUL, Minn. – The U.S. Army Corps of Engineers, St. Paul District, will host three open houses onboard the Motor Vessel Mississippi: • La Crosse, Wisconsin, Aug. 12, 5-7 p.m., at Riverside Park • Wabasha, Minnesota, Aug. 13, 5-7 p.m., at 50 Pembroke Ave. (adjacent to the National Eagle Center) • Red Wing, Minnesota, Aug. 14, 10 a.m.-12 p.m., at Levee Park

  • Corps seeking public comment on Apoon study

    The U.S. Army Corps of Engineers – Alaska District prepared a draft disposition study and environmental assessment on the Apoon Mouth of the Yukon River historical project.

  • Engineers help to improve educational opportunities in Mongolia

    In a country experiencing a shortage of critical educational facilities, the U.S. Army Corps of Engineers – Alaska District is overseeing the design and construction of kindergartens to better the lives of children in Mongolia.

  • A Quantitative Risk Assessment Method for Synthetic Biology Products in the Environment

    Abstract: The need to prevent possible adverse environmental health impacts resulting from synthetic biology (SynBio) products is widely acknowledged in both the SynBio risk literature and the global regulatory community. However, discussions of potential risks of SynBio products have been largely speculative, and the attempts to characterize the risks of SynBio products have been non-uniform and entirely qualitative. As the discipline continues to accelerate, a standardized risk assessment framework will become critical for ensuring that the environmental risks of these products are characterized in a consistent, reliable, and objective manner that incorporates all SynBio-unique risk factors. Current established risk assessment frameworks fall short of the features required of this standard framework. To address this, we propose the Quantitative Risk Assessment Method for Synthetic Biology Products (QRA-SynBio) – an incremental build on established risk assessment methodologies that supplements traditional paradigms with the SynBio risk factors that are currently absent and necessitates quantitative analysis for more transparent and objective risk characterizations. The proposed framework facilitates defensible quantification of the environmental risks of SynBio products in both foreseeable and hypothetical use scenarios. Additionally, we show how the proposed method can promote increased experimental investigation into the likelihood of hazard and exposure parameters and highlight the parameters where uncertainty should be reduced, leading to more targeted risk research and more precise characterizations of risk.

  • Cyanobacteria Harmful Algal Blooms (HABs) and US Army Engineer Research and Development Center (ERDC): Research and Services

    Abstract: This factsheet details the research and services available from the US Army Engineer Research and Development Center–Environmental Laboratory’s Harmful Algal Blooms team.

  • Geotechnical Effects on Fiber Optic Distributed Acoustic Sensing Performance

    Abstract: Distributed Acoustic Sensing (DAS) is a fiber optic sensing system that is used for vibration monitoring. At a minimum, DAS is composed of a fiber optic cable and an optic analyzer called an interrogator. The oil and gas industry has used DAS for over a decade to monitor infrastructure such as pipelines for leaks, and in recent years changes in DAS performance over time have been observed for DAS arrays that are buried in the ground. This dissertation investigates the effect that soil type, soil temperature, soil moisture, time in-situ, and vehicle loading have on DAS performance for fiber optic cables buried in soil. This was accomplished through a field testing program. Signal to Noise Ratio (SNR) of the DAS response was used for all the tests to evaluate the system performance. The results of the impact testing program indicated that the portions of the array in gravel performed more consistently over time. The results also indicated that time DAS performance does change somewhat over time. Performance variance increased in new portions of array in all material types through time. Overall, this dissertation provides guidance that can help inform the civil engineering community with respect to installation design recommendations related to DAS used for infrastructure monitoring.