Pilot trainee Charles Ashley walks along the pipe that carries dredged material away from the Dredge Jadwin as the U.S. Army Corps of Engineers boat deepens the Mississippi River channel to 30 feet at Delta Point Thursday afternoon. During traditional low-water months of July to December, Corps dredges work to ensure that river barges will have the depth they need to safely navigate the bends. The Corps boasts that the four-story, 274-foot-long boat and its gear in 24 hours can move enough mud and silt to cover a football field 60 feet deep. The Jadwin was expected to be in Vicksburg through today and move next to Rosedale. A series of pontoons on the boat serves to keep an 800-foot pipe afloat for the dredge material to be moved.