RedactedNarrative: Vessel 1- Eastbound on Rainbow Lake made left turn in circuitous pattern, and Vessel 2 Eastbound on Rainbow Lake made left turn in circuitous pattern and struck Vessel 1 in right rear side.  No injuries to operators or passengers of either vessel.  
  
  Vessel 2 hull plastic hull failed, large crack about 6 inches wide and 24 inches long, andthen began to sink and capsized/overturned, and both operator and passenger left the vessel to keep it afloat.  Vessel 2 Operator and passenger were assisted to shore by a runabout boat.  Operator and passenger then pulled Vessel 2 ashore to drain water. 