RedactedNarrative: Operator and Occupant put on the Elk River at around 8:00am at the Hwy 50 bridge below Tim''s Ford Dam to hunt ducks. At around 10:00 am they had made it to the island off of Vanzant Bend Rd and took the left split of the river around the island. By that point their trolling motor had run out of battery and they were paddling. Just after going under the old wooden bridge at the island they struck a tree that was laying in the river and got hung up. the water starting coming over the stern of the boat and then it flipped over. Operator drifted downstream a few hundred yards and was able to grab onto a tree that was hanging out into the water and pull himself up and out onto the bank. Operator was able to walk out to a house about a half of a mile away. Occupant held onto the boat and drifted with it while holding his shotgun. After drifting with the boat about a half of a mile Occupant was able to grab a tree and pull himself out. Occupant found a barn and tried to start a fire and a propane heater but couldn''t. Occupant left his shotgun and walked out about 3/4 of a mile to the same house as Operator. They called 911 and got an ambulance to come pick up Occupant and take him to Southern Tennessee Medical Center in Winchester, Tn. Occupant had hypothermia and frostbite on his hands and feet. The boat was found by fishermen a few days later a couple of miles downstream from where it flipped.