• Maine Turnpike Authority seeks permit for proposed work in York County, Maine

     The U.S. Army Corps of Engineers, New England District received a permit application to conduct
  • USACE Buffalo District Announces 2022 Operations Schedule for Black Rock Lock

    The U.S. Army Corps of Engineers (USACE), Buffalo District is announcing the Black Rock Lock operations schedule for the 2022 navigation season. The Black Rock Lock is one of three lock systems operated and maintained by USACE on the U.S. side of the Great Lakes and saw more than 2,600 vessels and 60,000 metric tons of commerce pass through its walls in fiscal year 2021.
  • Corps urges extreme caution downstream of Lock and Dam 8

    ST. PAUL, Minn. – The U.S. Army Corps of Engineers, St. Paul District, is urging extreme caution downstream of Lock and Dam 8 in Genoa, Wisconsin, the week of Feb. 7. There will be an abundance of ice being released and subsequent open water and/or thin ice, causing possible safety concerns for anyone on the ice downstream.
  • Celebrating World Wetlands Day

    World Wetlands Day was celebrated this week with the theme ‘Call to Act’ for Wetlands. It's an appeal to invest financial, human, and political capital to save the world’s wetlands from disappearing and to restore those we have degraded. It highlights the need to raise national and global awareness about wetlands to reverse their rapid loss and encourage actions to conserve and restore them. To protect against further loss, the nation has in recent years adopted a policy of "no net loss" of wetlands. USACE, working in partnership with many other organizations, is helping to implement this policy by protecting, preserving, and restoring.
  • INFRASTRUCTURE INVESTMENT AND JOBS ACT FUNDING

    The Infrastructure Investment and Jobs Act (IIJA) was signed into law by President Biden Nov. 15, 2021. Under the IIJA spend plan the U.S. Army Corps Engineers Mobile District’s total spending will exceed $82.7 million.
  • Antecedent Precipitation Tool (APT) Version 1.0: Technical and User Guide

    Abstract: This document provides an overview of the technical components of the Antecedent Precipitation Tool (APT) and a user guide for using the APT. The APT is an automation tool that the US Army Corps of Engineers (USACE) developed to facilitate the comparison of antecedent or recent precipitation conditions for a given location to the range of normal precipitation conditions that occurred during the preceding 30 yr¹. In addition to providing a standardized methodology to evaluate normal precipitation conditions (“precipitation normalcy”), the APT can assess the presence of drought conditions and the approximate dates of the wet and dry seasons for a given location.
  • Infrastructure Bill Provides Funding for Design of Selma Project

    The U.S. Army Corps of Engineers, Mobile District recently received congressional funding for the design of the Selma Flood Risk Management Feasibility Project in Selma, Ala.
  • Dynamics Modeling and Robotic-Assist, Leader-Follower Control of Tractor Convoys

    Abstract: This paper proposes a generalized dynamics model and a leader-follower control architecture for skid-steered tracked vehicles towing polar sleds. The model couples existing formulations in the literature for the powertrain components with the vehicle-terrain interaction to capture the salient features of terrain trafficability and predict the vehicles response. This coupling is essential for making realistic predictions of the vehicles traversing capabilities due to the power-load relationship at the engine output. The objective of the model is to capture adequate fidelity of the powertrain and off-road vehicle dynamics while minimizing the computational cost for model based design of leader-follower control algorithms. The leader-follower control architecture presented proposes maintaining a flexible formation by using a look-ahead technique along with a way point following strategy. Results simulate one leader-follower tractor pair where the leader is forced to take an abrupt turn and experiences large oscillations of its drawbar arm indicating potential payload instability. However, the follower tractor maintains the flexible formation but keeps its payload stable. This highlights the robustness of the proposed approach where the follower vehicle can reject errors in human leader driving.
  • Temporary Road and Park Closures at Lake Sidney Lanier

    The U.S. Army Corps of Engineers, Lake Sidney Lanier advises the public that Buford Dam Road will be temporarily closed for roadway maintenance at 9 a.m. on Feb. 9. It is expected that the work will be completed by 5 p.m. During this time, use Highway 20 as an alternate route.
  • 22-008 Lower Granite Visitor Center to be closed February 7 through 9 for maintenance

    CLARKSTON, WA –The Lower Granite South Shore Visitor Center will be closed between Feb. 7 and 9 for maintenance work at the facility.