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The Mississippi River Visitor Center is located on the Rock Island Arsenal in Rock Island, Illinois at Locks and Dam 15 , overlooking the Upper Mississippi River. The Mississippi River Visitor Center is operated by the Mississippi River Project of the Rock Island District, U.S. Army Corps of Engineers. The visitor center is open seven days a week with the exception of Thanksgiving, Christmas, and New Year's Day. Hours of operation are 9:00 am - 5:00 pm. Call about seasonal Lock & Dam…