RedactedNarrative: Vessel 1 was traveling southbound on Lake Decatur at approximately 25 mph.  The operator of Vessel 1 could not see the dark colored break wall due to lack of lighting.  The operator of Vessel 1 did not see the breakwall until the Vessel was very close to it.  Collision could not be avoided and Vessel 1 struck the breakwall ramping the front half of the watercraft onto the breakwall and injuring the operator and three other passengers.  Holes in the watercraft from the collision lead to the back half of the vessel sinking into the water until it could be recovered. 
  
  After an investigation of this accident, it is my opinion that the contributing causes to this accident were operator inexperience and the operator violating the posted no wake regulation.