RedactedNarrative: On 20 October 2018, I officer responded to Watts Bar Dam Access Area where a boat supposedly sunk, and after arriving at the scene, I met the owner and operator of the boat, where he explained that he backed his boat into the water and tied it to the dock. When he returned, Operator and his two passengers entered the boat and it is here where he noticed the boat was taking on a lot of water. He advised the two passengers to get back on the dock while he ran to get his vehicle and trailer. By the time he returned, the boat was underwater except for the bow. Operator, along with several individuals, managed to get the boat on the trailer and out of the water. While inspecting the damage, Operator and I walked around the boat and determined either the live well pump or bilge pump broke free from the transom allowing the water to enter the boat, which caused the sinking. Operator claimed the motor hydraulic lift was not working correctly and the depth finder/graphs was also damaged. There was also 5 tackle boxes and 1 fishing rod lost. No injuries was reported, and this all occurred on Watts Bar Lake in Meigs county.