Locks and Dam 15 Lower Guidewall
A large section of the lower guidewall at Locks and Dam 15 was removed in May 2017 after engineers from the U.S. Army Corps of Engineers, Rock Island District noticed portions of the wall had moved significantly. At the time, it was determined that four monoliths making up a portion of the guidewall needed to be demolished as the failing concrete created risk to the navigation system.

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Photo by: Rock Island District |  VIRIN: 180906-A-VX113-001.JPG