At approximately 1000 hours on 7/8/10 I was contacted by NPS Ranger and asked to take an accident report.  Ranger  stated that a vessel had caught on fire in Labyrinth Canyon the previous night and the owners had reported it this morning.

I responded on my patrol vessel to the mouth of Labyrinth Canyon and was flagged down by passengers on a houseboat  that was towing the burned vessel.  I investigated the accident and took the vessel information.

According to witnesses, at approximately 2400 hours someone saw that this vessel was on fire and alerted the other people in their group.  The burning vessel was anchored and had no people on board.  The owner and other people on the houseboat used fire extinguishers from the houseboat and were able to put the fire out on the ski boat.  I asked the owner if he knew what had caused the fire.  He stated he believed it was an electrical problem and that he had just put a new battery in the vessel.  Looking at the fire damage it was obvious that the fire had burned most intensely near the left rear of the vessel where the battery is located.  Pictures of the damage are available upon request.

The owner of the vessel filled out a witness statement.
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