From the September 29, 2015, WSB-Atlanta (Ga.) "Archaeologists to pluck 3 Civil War cannons from river site" by Susanne Schafer.
Sailors on the CSS Pee Dee threw three cannons overboard in the river of the same name in the closing months of the war to prevent capture. Then the ship was burned and scuttled. These cannons will be sent to he conservation lab in North Charleston, S.C. where the Confederate submarine H.L. Hunley is being restored.
Preserving the cannons is expected to be a two-year process. After which the cannons will be displayed in the Florence, South Carolina, area.
An underwater dive team has dredged the area around them and placed straps which will pull them out of the river. A front loader will then be utilized to lift them out. The cannons are located in mud and water between 8 and 10 feet deep.