WILLIAMSBURG, Va. -- A ship passes by the Cottrell Contracting Corporation Dredge Marion as it 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 like this to move goods to and from the inland ports. (U.S. Army photo/Patrick Bloodgood)