AdvertisementAs Water Level Falls, Concerns About Mississippi River's Barge Traffic RiseDecember 28, 2012Mark MemmottfacebookEmailThis WWII-era minesweeper once was a floating museum in St. Louis. Swept away in a 1993 flood, it has been under water in the river for most of the years since. But the ship has been exposed as the river's water level has fallen. (Photo taken on Dec. 14.)