Dec. 19, 2011
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WINFIELD, Mo. - ERDC Coastal and Hydraulics Laboratory (CHL), at the request of the U.S. Army Corps of Engineers St. Louis District, utilized the ERDC acoustical camera system, equipment developed under the Navigation Systems Research Program, to inspect scouring below the lock at Lock and Dam 25 on the Mississippi River near Winfield, Mo.
Lock and Dam 25 is part of the Upper Mississippi River Nine Foot Navigation Project. The project, authorized by the Rivers and Harbors Act of 1930, created and ensured a nine-foot-deep navigation river channel.
Divers deployed the acoustical camera and used a newly modified under-the-helmet monitor to assist the diver in seeing the exposed area.
With this last inspection, St. Louis District expressed that the camera was successful in determining the degree of scouring and the results indicate that the scouring was extensive, reaching up to 22 feet beneath the lock wall.
The camera was deployed in early November by CHL researchers Terry Warren and Ken Switzer, ERDC-CHL.