TAOS, Mo. -- The Missouri State Water Patrol says a Jefferson City man drowned Sunday when his boat flipped near a lock and dam in Cole County. The water patrol says 41-year-old Shad Ridenhour was going into the lock and dam when he apparently changed his mind and tried to grab the dam to stop. Ridenhour's boat flipped around and he was thrown out. The water patrol says several bystanders tried to help but Ridenhour went under and did not resurface.