• Chickamauga’s upstream approach wall piers get solid start

    CHATTANOOGA, Tenn. (Sept. 27, 2023) – The Upstream Approach Walls for the Chickamauga Lock Replacement Project got a solid start when work crews placed 148 cubic yards of tremie concrete Sept. 20 into the drilled shaft on the bottom of the Tennessee River.
  • POW relative’s remains coming home spurs pride in family, service and sacrifice

    Bee Spring, Kentucky – Darren Smith, a natural resource specialist with Nolin River Lake in Bee Spring, Kentucky, has deep ties to the area around the lake, and those ties are about to become even deeper as the remains of his great uncle, a World War II Veteran, are to be brought home and buried at a local cemetery Oct. 1.
  • ERDC-Vicksburg laboratories celebrate 25th anniversary with Open House

    Laboratories from across the U.S. Army Engineer Research and Development Center (ERDC) showcased their expertise, experiments and research as part of a celebration honoring the agency's 25th anniversary.
  • Evaluation of Non-Destructive Testing (NDT) Methods for Wood Power Poles

    Abstract: This technical report aims to test the effectiveness of several non-destructive testing (NDT) technologies on wood utility poles to detect deterioration. The project will assess commercially available devices using sound velocity and drilling resistance methods for in-field measurements. The goal is to extend the lifetime of wood poles, prevent unexpected failure, and enhance their in-service life beyond the current 75-year expectation. Despite the benefits of wood poles, it is difficult to obtain reliable deterioration metrics on in-service poles, which can lead to premature decommissioning or pole failure. NDT methods have been developed to replace labor-intensive methods, but none have been largely adopted in common practice. Therefore, creating a database of validated data would expedite adoption. Integrating precise and efficient wood utility pole NDT can increase installation energy resiliency and facility sustainment in a fiscally responsible way, ensuring high standards of delivery of services.
  • Kansas City District continues legacy of dedicated work on the Lewis and Clark Center at Fort Leavenworth

    The Lewis and Clark Center at Fort Leavenworth is a state-of-the-art building, boasting three floors full of custom stained-glass windows and military artifacts from many different countries and centuries. The building houses the Command and General Staff College, a joint, interagency, intergovernmental and multinational college and the U.S. military’s premier school of tactics. It is also one of the Kansas City District’s many projects at Fort Leavenworth from over the years. The district has a long and proud history of partnership with Fort Leavenworth. The Lewis and Clark Center is one of the largest projects the district has done for the installation. Completed in 2007, the building has since required repairs on the heating, ventilation and air conditioning system. Now, the Kansas City District is continuing its commitment to this building and taking the lead on the repairs.
  • Lake Superior Maritime Visitor Center celebrates 50 years

    DULUTH, Minn. – The Lake Superior Maritime Visitor Center in Duluth, Minnesota celebrates 50 years with an event Thursday, September 28 from 11 a.m. to 3 p.m. The U.S. Army Corps of Engineers’ Lake Superior Maritime Visitor Center and the Lake Superior Marine Museum Association will host a celebration with refreshments, a look back at the history of the Visitor Center including photos, old park ranger uniforms and some rarely-before-seen artifacts from the collection.
  • SWG hosts regulatory workshop

    The U.S. Army Corps of Engineers (USACE) Galveston District (SWG) hosted a workshop on their regulatory program September 21, 2023.
  • During Nearshore Event Vegetation Gradation (DUNEVEG): Geospatial Tools for Automating Remote Vegetation Extraction

    Abstract: Monitoring and modeling of coastal vegetation and ecosystems are major challenges, especially when considering environmental response to hazards, disturbances, and management activities. Remote sensing applications can provide alternatives and complementary approaches to the often costly and laborious field-based collection methods traditionally used for coastal ecosystem monitoring. New and improved sensors and data analysis techniques have become available, making remote sensing applications attractive for evaluation and potential use in monitoring coastal vegetation properties and ecosystem conditions and changes. This study involves the extraction of vegetation metrics from airborne lidar and hyperspectral imagery (HSI) collected by the US Army Corps of Engineers (USACE) National Coastal Mapping Program (NCMP) to quantify coastal dune vegetation characteristics. A custom geoprocessing toolbox and associated suite of tools were developed to allow inputs of common NCMP lidar and imagery products to help automate the workflow for extracting prioritized dune vegetation metrics in an efficient and repeatable way. This study advances existing coastal ecosystem knowledge and remote sensing techniques by developing new methodologies to classify, quantify, and estimate critical coastal vegetation metrics which will ultimately improve future estimates and predictions of nearshore dynamics and impacts from disturbance events.
  • Microseira wollei (M. wollei) Blooms in Freshwater Ecosystems in Lake St. Clair (Michigan, USA)–Impacts and Possible Management Approaches

    PURPOSE: The proliferation and shoreline accumulation of the filamentous biphasic cyanobacterium, Microseira wollei (M. wollei) (previously classified as Lyngbya wollei), have become an increasing problem in the Great Lakes, both for aesthetic reasons and its potential to harbor harmful bacteria and pathogens (Vijayavel et al. 2013). Occurrences have been reported and studies have also been conducted in the southeastern US where M. wollei has become a nuisance in recent years and is known to produce toxins (Hudon et al. 2014). Reports of M. wollei proliferations in the eastern US have been identified in the Manitoba lakes (Macbeth 2004), in Lake Erie from Maumee Bay (Bridgeman and Penamon 2010), in Lake St. Clair near Detroit (Vijayavel et al. 2013), and throughout the St Lawrence River (Vis et al. 2008; Lévesque et al. 2012). M. wollei has become a serious nuisance for marinas, public beaches, and lakefront property owners. In addition, M. wollei appears to have the ability to produce a wide range of toxins, but the conditions promoting their production, type, and concentration are poorly known (Hudon et al. 2014). Occurrences of large algal mats matching characteristics of M. wollei have been observed along the northwest shore and nearshore waters of the beach at Lake St. Clair dating back to 2010. To date, a comprehensive study detailing the potential impacts M. wollei has on freshwater ecosystems in the Great Lakes River, particularly Lake St. Clair is lacking. Further, management solutions are not well understood. This technical note (TN) reviews the potential causes of M. wollei blooms and their ecological impacts on aquatic systems and assesses the management options available to eliminate or minimize the impacts of these blooms.
  • Linking the SEDLZJ Portable Standalone Library to the CMS Coastal Hydrodynamic Model

    PURPOSE: This document describes the repackaging and linkage of the Sandia National Laboratories Environmental Fluid Dynamics Sediment Processes Code (SNL-EFDC-SEDZLJ), (Thanh et al. 2008). It was originally incorporated within a modified version of the US Environmental Protection Agency’s (USEPA) EFDC public-domain surface-water flow, sediment transport, and water-quality model developed by John Hamrick (Hamrick 1992) and its linkage to the ERDC-CHL-CMS hydrodynamic model. SNL-EFDC simulates flow and transport of sediment as bedload and suspended load. SNL-EFDC-SEDZLJ improves EFDC with updated sediment kinetics subroutines. Sediment erosion is calculated using data collected with a Sediment Erosion at Depth flume (SEDflume). SEDflume measures erosion rates as a function of shear stress and depth from relatively undisturbed cores taken directly from the sediment bed below the water body of interest. The use of SEDflume data provides more accurate sediment erosion rates that are directly input to the model.