RedactedNarrative: On August 20, 2016 about 1500 hours Vessel 2 was traveling Eastbound on Willard Bay Reservoir toward Eagle Beach. Vessel 1 was East of Vessel 2. Vessel 1 was facing East and beached. No occupants were in Vessel 1. Vessel 2 struck Vessel 1 in the starboard side stern and broke the swim deck. Subject described to me that as he was getting closer to the boat he let go of the throttle and tried to steer away. He described off-throttle steering. No one was injured.