I learned about this lock and dam because of these three posts.
Massman Construction Co. posted two photos on Dec 13, 2018, with the comment:
The Massman team is currently performing emergency repair work at the Columbia Lock and Dam in Columbia, Louisiana. Massman is partnering with the USACE’s Vicksburg District to address seepage, sand boils, and voids beneath portions of the structure.
As a result of these issues, the lock and dam, as well as portions of the Ouachita River, have been closed to navigation since July 3.
|Massman Construction Co. posted on July 23, 2020|
Associated General Contractors of America|
Mississippi Valley Division (US Army Corps of Engineers)|
|Massman Construction Co. posted on Oct 6, 2020|
The Columbia Lock and Dam Emergency Seepage Repairs recently earned
Engineering News-Record's Award of Merit in the Water/Environment category in Texas & Louisiana.
In the face of an “exponentially increasing risk of failure” of the lock structure due to foundational undermining, Massman partnered with
Vicksburg District - USACEto perform emergency repairs to the structure and restore the Ouachita River’s navigability.
Congratulations to the project team!
Massman's project web page contains three photos with the comment:
The Columbia Lock and Dam is owned and operated by the United States Army Corps of Engineers’ Vicksburg District. In the face of an “exponentially increasing risk of failure” of the lock structure due to foundational undermining, the District declared an Official Dam Safety Emergency and suspended navigation through the lock in July 2018. We partnered with USACE to perform emergency repairs to the structure and restore the Ouachita River’s navigability, including the development of an alternative construction approach to address voids that were significantly larger than anticipated.
The project involved the drilling of nearly 300 holes ranging in diameter from 4 to 15 inches, subaqueous grouting and concrete placement, and the installation of a sheet pile cutoff wall. Other major scope elements included the removal and replacement of a portion of the lock floor without dewatering the structure, and the installation of a permanent relief well and dewatering system.