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  • The Behaviour of Near-Surface Soils Through Ultrasonic Near-Surface Inundation Testing

    Abstract: Seismometers installed within the upper metre of the subsurface can experience significant variability in signal propagation and attenuation properties of observed arrivals due to meteorological events. For example, during rain events, both the time and frequency representations of observed seismic waveforms can be significantly altered, complicating potential automatic signal processing efforts. Historically, a lack of laboratory equipment to explicitly investigate the effects of active inundation on seismic wave properties in the near surface prevented recreation of the observed phenomena in a controlled environment. Presented herein is a new flow chamber designed specifically for near-surface seismic wave/fluid flow interaction phenomenology research, the ultrasonic near-surface inundation testing device and new vp-saturation and vs-saturation relationships due to the effects of matric suction on the soil fabric.

  • JAIC Predictive Maintenance Dashboard User Manual

    Abstract: This manual is intended for new users with minimal or no experience with using the JAIC Predictive Maintenance Dashboard (JPD). The goal of this document is to give an overview of the main functions of JPD. The primary focus of this document is to demonstrate functionality. Every effort has been made to ensure this document is an accurate representation of the functionality of the JPD. For additional information about this manual, contact ERDC.JAIC@erdc.dren.mil

  • Sabine Pass to Galveston Bay, TX Pre-Construction, Engineering and Design (PED): Coastal Storm Surge and Wave Hazard Assessment: Report 1 – Background and Approach

    Abstract: The US Army Corps of Engineers, Galveston District, is executing the Sabine Pass to Galveston Bay Coastal Storm Risk Management (CSRM) project for Brazoria, Jefferson, and Orange Counties regions. The project is currently in the Pre-construction, Engineering, and Design phase. This report documents coastal storm water level and wave hazards for the Port Arthur CSRM structures. Coastal storm water level (SWL) and wave loading and overtopping are quantified using high-fidelity hydrodynamic modeling and stochastic simulations. The CSTORM coupled water level and wave modeling system simulated 195 synthetic tropical storms on three relative sea level change scenarios for with- and without-project meshes. Annual exceedance probability (AEP) mean values were reported for the range of 0.2 to 0.001 for peak SWL and wave height (Hm0) along with associated confidence limits. Wave period and mean wave direction associated with Hm0 were also computed. A response-based stochastic simulation approach is applied to compute AEP runup and overtopping for levees and overtopping, nappe geometry, and combined hydrostatic and hydrodynamic fluid pressures for floodwalls. CSRM structure crest design elevations are defined based on overtopping rates corresponding to incipient damage. Survivability and resilience are evaluated. A system-wide hazard level assessment was conducted to establish final recommended system-wide CSRM structure elevations.

  • U.S. Army Corps of Engineers Blue Roof Program adds an additional Parish: Assumption Parish

    The U.S. Army Corps of Engineers is adding an additional Parish: Assumption Parish for the Blue Roof program. The Blue Roof program is to get as many houses into livable condition as possible during Hurricane Ida recovery. Operation Blue Roof is a priority mission managed by the U.S. Army Corps of Engineers for FEMA.

  • U.S. Army Corps of Engineers Blue Roof Program adds an additional Parish: St Helena

    The U.S. Army Corps of Engineers is adding an additional Parish: St Helena for the Blue Roof program. The Blue Roof program is to get as many houses into livable condition as possible during Hurricane Ida recovery. Operation Blue Roof is a priority mission managed by the U.S. Army Corps of Engineers for FEMA.

  • LA District marks completion of Newport Bay Harbor jetty repairs, dredging slated to finish Sept. 10

    After the placement of 4,500 tons of stone and 150 cubic yards of concrete, the U.S. Army Corps of Engineers Los Angeles District marked the completion of repairs to the east jetty at Newport Bay Harbor, with the area reopening to the public Aug. 25.

  • Winter Gavins Point releases will be at minimum rates

    Updated: Fort Peck release reductions was incorrectly reported as Sept 6 and has been corrected to Sept. 16. Drought conditions, particularly in the Missouri River Basin above Sioux City, Iowa (upper Basin), are persisting. Per the Master Manual and the Sept. 1 System storage check, winter releases from Gavins Point Dam will be 12,000 cubic feet per second, as part of the overall water conservation measures. “Reservoir inflows in August were much lower than average. We expect below-average inflows into the System through the rest of 2021,” said John Remus, chief of the U.S. Army Corps of Engineers’ Missouri River Basin Water Management Division.

  • Running Reelfoot Bayou Feasibility Study Public Scoping Meeting

    The U.S. Army Corps of Engineers Memphis District (USACE) and the West Tennessee River Basin Authority  (WTRBA)  will  host  a  general  scoping  meeting  to  solicit  comments  and information from the public regarding a feasibility study that will investigate National Ecosystem Restoration benefits related to restoring aquatic and floodplain habitat along Running Reelfoot Bayou in Lake, Obion, and Dyer Counties, Tennessee. The meeting will be held on Thursday September 9, 2021, from 4:00 p.m. until 6 p.m. at Reelfoot Lake State Park, Bluebank Day Use Area.

  • MKARNS Nav Notice No. SWL 21-35 USCG Advisory: Channel Reopened I-430 Bridge

    MKARNS - The U.S. Coast Guard has advised that the navigation channel has reopened to traffic under the I-430 Bridge, NM 126.6.

  • USACE Vicksburg District engages emergency operations, mapping centers in preparation for Hurricane Ida

    The U.S. Army Corps of Engineers (USACE) Vicksburg District activated its Emergency Operations Center (EOC) at Level II Emergency Watch for Hurricane Ida, Aug. 27, 2021, and conducted its first crisis management team meeting today to coordinate with all District elements and ensure proper hurricane preparation.