RedactedNarrative: On June 4, 2015 at approximately 0023 hrs est Post 15 called and notified me of a vessel explosion at Grider Hill Marina on Lake Cumberland. Upon arrival Clinton County Fire department had the vessel extinguished. Vessel was then towed to the ramp to shallow water in case the boat started to take on water. Once boat made it to ramp I went on board and began to examine the vessel and take photographs. The owners of the boat was not present at the time and was notified by the Marina.
   
    An eye witness to the explosion stated that they heard a large explosion and saw a large fireball came from the stern of the vessel. Two young men were fishing on the dock nearby when the explosion occurred. Both went over to the vessel extinguished the flames with fire extinguishers.  They stated that the bilge pumps were running whenever they went over to it.   
   
   It appears that the explosion and fire was caused by fuel vapors being ignited by the bilge pump due to the small amount of fire damage to the vessel. Most of the damage is from the blast. The fire damage was isolated to the stern on the starboard side. The blast originated in the bilge due to the fact that the cabin had been busted loose and lifted from the gunales on all four corners.  There were several hatches that accessed the bilge and they were blown open and off their hinges. Most of the glass was blown out of the vessel and was blown in excess of 75' of the vessel.
   
    I interviewed the owner later in the day and he stated that they had been on the vessel this past Sunday on May 31, 2015 and fueled up both tanks just before leaving. They stated that they never had filled up like that and left shortly after. They also believe that the event was caused by fuel vapors.