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  • Approaches to Identify and Monitor for Potential Acid Sulfate Soils in an Ecological Restoration Context

    Purpose: Potential acid sulfate soils include materials with the capacity to generate acidity under certain environmental conditions. As such, these soils can pose challenges to ecological restoration projects occurring in wetlands and nearshore environments. To provide guidance for ecosystem restoration practitioners, the following technical note describes acid sulfate soil formation and distribution and then describes techniques for identifying and monitoring acid sulfate soil conditions prior to and following implementation of restoration activities. Finally, this technical note outlines a number of tools and recently published resources to help avoid unintended consequences of acid sulfate soil disturbance and achieve ecological restoration objectives.

  • Meet the inventors: Bed-load transport measurement technique

    What did it take for the four-member research team who developed the “ISSDOTv2 bedload transport methodology” to create a U.S. patent-worthy invention? For this team, it was made possible by varied expertise, a combined 86 years of experience, a desire to solve river sediment challenges and helpful friendships.

  • Air Force and USACE break ground for new vehicle maintenance facility at Whiteman Air Force Base

    A group of Air Force and Army leaders joined with construction professionals to mark the groundbreaking for the new vehicle maintenance facility at Whiteman Air Force Base near Knob Noster, Mo., Feb. 16, 2022. With airmen and civilians providing maintenance for the growing fleet of support vehicles at the base in facilities – some constructed during the build up to World War II – the Air Force funded the new consolidated facility which will greatly increase safety and efficiency. The Kansas City District, U.S. Army Corps of Engineers, serve as the construction agent for this military construction project. L.S. Black Constructors, of Saint Paul, Minn., is the prime contractor.

  • Coastal and Hydraulics Laboratory invention team receives patent for bed-load transport measurement technique

    Utilizing their combined decades of experience in river mechanics, a four-member team of research physicists and hydraulic engineers with the Engineer Research and Development Center (ERDC) combined their expertise to invent the Integrated Section, Surface Difference Over Time, version 2 (ISSDOTv2) method, which accurately measures the sediment moving on the bed of large sand-bed rivers. The team from ERDC’s Coastal and Hydraulics Laboratory (CHL) received their patent, “Bedload transport methodology and method of use,” in July of 2021.

  • NR 22-04: Corps of Engineers ends Cook Recreation Area initiative

    NASHVILLE, Tenn. (Feb. 17, 2022) - The U.S. Army Corps of Engineers Nashville District is ending its initiative for a public-private partnership to lease Cook Recreation Area at J. Percy Priest Lake in Hermitage, Tennessee.

  • USACE conducts boundary line maintenance on Nimrod and Blue Mountain Lakes

    PLAINVIEW, Ark. – The U.S. Army Corps of Engineers, Nimrod-Blue Mountain Project Office is advising landowners adjacent to public lands around Nimrod and Blue Mountain Lakes that contract maintenance crews will be conducting boundary line maintenance along a 20-mile section of government boundary at Nimrod Lake and a 17-mile section at Blue Mountain Lake. Work is currently underway at Blue Mountain Lake.

  • 22-011 Sections of the Lewiston Levee Trail to be closed temporarily for hazard tree removal

    Lewiston, Idaho. – The Lower Granite Natural Resources Management Office, part of the U.S. Army Corps of Engineers’ Walla Walla District, will be closing sections of the Lewiston Levee Trail between Tuesday, Feb. 22 and Thursday Feb. 24 for hazard tree removal.

  • Annual Report for Army Regional Environmental and Energy Offices now available

    The Fiscal Year 2021 annual report for the U.S. Army Regional Environmental and Energy Offices (REEOs) is now available. The REEOs represent Army and Department of Defense (DOD) environmental and energy interests at the state and regional level to support and advocate for military missions and facilities.

  • A look back: Williamson’s 33 years of service

    With more than 33 years of federal service, Engineering and Construction (E&C) Division Chief Steve Williamson recently completed one life chapter and is now starting another. To help him close out this part of life, we're taking a look back to celebrate his life and career with the Memphis District.

  • Walter Marine and Atlantic Reefmaker Wave Attenuator: Wave Transmission Testing Results

    Abstract: As part of a testing service agreement with Walter Marine and Atlantic Reefmaker, a 1:5.2 physical model of the Reefmaker Wave Attenuator was constructed and tested by the US Army Engineer Research and Development Center to evaluate its influence on wave attenuation. The tested prototype wave periods ranged from 2.5 to 8 sec with prototype wave heights between 1 ft and 6.5 ft. The Reefmaker Wave Attenuator included orthogonal and square designs and was tested under a variety of configurations including a suspended configuration, a bed-mounted configuration, and a rotated configuration. Testing demonstrated that depending on configurations and wavelength, the wave transmission coefficients ranged from 0.29 to 0.70. The most improvement, however, was demonstrated when testing the square unit designs with transmission coefficients, kt, below 0.51. The smallest kt of 0.29 occurred during square unit testing, which consisted of eight bed-mounted, square Ecosystem disks plus a base unit (24.05 in. freeboard) and with a wave period of 3.0 sec and height of 0.84 ft. Of all 134 tests performed, including the suspended case, the average transmission through the structure was 58%.