RedactedNarrative: Vessel 1 was turning from the main portion of the lake into shangri la marina. Vessel 2 was westbound approx 200 ft from shore.  Vessel 2 tried turning to starboard to avoid collision with vessel 1.  Vessel 1 struck the port side of vessel 2 and traveled down her side before going over the top of the stern of vessel 2.  Operator of vessel 1 was arrested for operating under the influence.  Area of the accident was approx 200 feet se of the breakwater and approx 700 feet e of the lighthouse and approx 650 ft s of the shangri la ship store.