The Knox County Sheriff's Office and Rural/Metro Fire responded to the scene at the other side of Concord Park near Concord Park Road and Northshore Drive around 4:01 p.m.
A WVLT News crew at the scene said onlookers told them the boat's passengers jumps off and swam ashore.
KCSO cleared the scene at 5:39 p.m., and Rural/Metro not long after at 6:20 p.m. Dispatchers said it didn't appear anyone was injured.