RedactedNarrative: On August 22, 2017 I returned from days off and listened to my voicemail messages.  I had one from August 19th at 1330 hours from dispatch stating there was a boat that sunk at El Dorado with nobody injured.  I returned the call to dispatch to find out information about the vessel to which they had none.  At 1430 hours on August 22 I went on the water at El Dorado and found a mostly sunk vessel with KA numbers.  
  
  I called the registrant and asked Owner about the boat and what his plans were to get it out.  Owner stated he had hit something under the water and it sunk and he was leaving it up to insurance to get the boat out.  I told Owner the boat needed to get out of the water now since it had been 3 days already whether it was him or insurance.  I set up a time to meet with Owner to get his and the boat''s information.  On August 23, at 1430 hours I met with Owner in Wichita at his residence.  I asked Owner to explain what happened.  
  
  Owner stated it was his second time on El Dorado in years and he was out there to explore the lake with his wife.  Owner stated they were in the area of Sailboat Cove and was following a boat through the timber.  Owner stated he felt his boat hit something under the water and the steering was acting weird after the impact like the rudder had broke.  Owner stated the boat had an inboard motor.  After the impact, Owner stated there was water coming into the boat and the bilge was running.  
  
  Owner then flagged down a nearby boat who took everybody on board.  Owner stated once they were on the other boat, his boat sunk on the back end with just the nose sticking out.  Owner stated the boat they were on tried to tow in his boat until the rope broke.  I collected his information and the boats information.  
  
  On August 23 at 1830 hours I was contacted by Heartland towing stating they were retrieving the boat.  I met them at the boat ramp and observed the boat as it came out of the water.  I noticed the back rudder was broke and water was dumping out of the boat through the hole.  I could see on the boat where the impact had caused the rudder to cut into the fiberglass of the back of the boat.  I also noticed damage to the propeller and asked Owner if this was new damage to which he stated yes.  I had noticed on his title that the boat engine horsepower was 44 and the engine in the vessel was much larger.  I asked Owner what horsepower this engine was and told 275.  I took photos of the damage and cleared the scene at 1930 hours.