WILLIAMSBURG, Va. -- The crew of the Cottrell Contracting Corporation Dredge Marion works to remove shoals from the James River federal navigation channel just off shore from James City County, Va., Nov. 6 2013. The river plays a role in the economies of Richmond and Hopewell, providing a navigation channel of 25 feet deep for ships to move goods to and from the inland ports. (U.S. Army photo/Patrick Bloodgood)