Dresden Lock
Dresden Lock and Dam on the Illinois River near Morris, Ill., is one of 239 lock chambers at 193 sites nationally operated by the U.S. Army Corps of Engineers that provides half-hourly lock and daily vessel specific information through a new Lock Performance Monitoring System that is Web-based and available to the public at http://corpslocks.usace.army.mil/.

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Photo by: USACE |  VIRIN: 120718-A-CE999-019.JPG