I'm thinking then that this guy just hatched. Can you get a picture of him? Some species of softshells prefer rivers while other species keep to lakes and ponds with sandy bottoms. If you're from Georgia then it is either a Florida Softshell or Gulf Coast Spiny Softshell.
If you plan on releasing him I would go with the pond in your development. If you decide to keep him in your pond, keep in mind they get quite large and will eat your fish. For now you can give him aquatic insects, earthworms, raw fish, Reptamin pellets and young fish.