RedactedNarrative: Operator/Owner launched his 42-foot boat at the Knife River Marina in route to Barker's Island Marina in Superior, WI. He had three passengers. They were at a slow speed, approximately 10 MPH when they approached Stoney Point. As they neared Stoney Point the boat hit a fixed object in the lake and jarred very hard and stopped. The boat immediately started taking on water. Operator explained that on his graph there were no rocks showing on the lake bottom, but when he looked over the edge he saw a large shelf-like rock that the boat was stuck on. All occupants then put on life jackets. The operator used the distress signal on his marine radio and contacted the US Coast Guard to come to his aid while one of the passengers called 911. When the deputy arrived at the scene, she saw the boat tipped partially on its starboard side into the water and stuck on the rock ledge approximately 200 yards out from shore. The USCG responded and safely removed all passengers from the boat. The deputy spoke with the boat operator who said he has been a boat captain for about 15 years and has over 500 hours on that specific boat. The operator arranged a private salvage tow. There were no injuries, and alcohol was not a factor. There was significant damage to the starboard side of the boat.