FILE- In this Aug. 14, 2015 file photo provided by the US Navy, Chief Warrant Officer 3, Jason Potts, on scene commander for Task Element CSS Georgia, supervises as a piece of casemate, made of railroad ties and timber, which served as the outer layer of armor for CSS Georgia, is raised from the Savannah River in Savannah, Ga. After the government spent months recovering wreckage of the sunken gunship, roughly half of the nearly 30,000 artifacts discovered has been returned to the bottom of the Savannah River. (MC1 Blake Midnight/US Navy via AP, File)

Civil War artifacts returned to river

The more than 16,600 relics they decided not to hang onto were placed in 10 storage containers, buried underwater, and covered with mud.