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  • Development and Characterization of Ultra-High-Performance Concrete for the Rehabilitation of Navigation Lock Structures

    Abstract: This report details the history of vertical lock wall repairs and the development and laboratory characterization of an ultra-high-performance concrete (UHPC) using locally sourced materials for improved durability of lock walls subjected to impact and abrasion from navigational vessels. This UHPC, referred to as Lock-Tuf, has been designed for use in a precast environment with ambient curing methods and serves as a material proof-of-concept for future lock wall rehabilitations. Mechanical properties such as unconfined compressive strength, flexural response, tensile capacity, impact resistance, and abrasion resistance have been quantified experimentally.
  • Final concrete shell placement sets project back on critical path

    GRAND RIVERS, Ky. (Feb. 2, 2020) – The final concrete shell placement at Kentucky Lock for the downstream cofferdam, which also forms the new lock wall, took place today, a milestone that put the construction project back on track.
  • Division commander receives Nashville District overview

    NASHVILLE, Tenn. (Oct. 4, 2019) – The commanding general of the U.S. Army Corps of Engineers Great Lakes and Ohio River Division visited the Nashville District this week for a district overview and project updates. It is the general’s first trip to the district since taking command of the division July 12, 2019.
  • Locked Up! Army Corps Lock Operators Battle Bone-Chilling Temps to Quickly Re-open Ohio River Navigation

    Bone-chilling winds cut through the crisp December air as operators and mechanics at a downed Ohio River lock scrambled on the early morning of Dec. 12 to isolate a hydraulic line break that shutdown navigation.