RedactedNarrative: Cruising the lake with family at approximately 25-30 mph in 4-5’ deep water approximately 400 feet from shore when we hit a submerged island in Stinkers Bay on Lake Koshkonong between Sunset Bar and Grill, Mud Lake and Blackhawk Island.  Water depth was at normal operating level as mandated by the DNR.  Island was approximately 8-12 inches below the surface of the water.  Further investigation showed the island is noted on area lake maps.  There were no hazard or navigation buoys marking the island or the hazard.  A pontoon boat was used to take my family off the boat after the crash and there was not enough water for the pontoon boat to float in the area.  The island was approximately 75’ by 100’ in area.
  
  No one sought medical attention.