RedactedNarrative: V1 was traveling south on Logan Martin lake and turning west into Rabbit Branch Creek on the right side of the island located in the front of the creek mouth. 
  
  V1 was cruising at under 10 mph. V1 drifted to the right and struck a pier. The driver of V1 stated that he had a sleep disorder. He stated that he had been on the upper end of the river most of the day and as he began traveling home he became sleepy. 
  
  He stated he pulled to the riverbank about half way and took a 30 minute nap. He started the remaining portion of his trip home and fell asleep as he was entering Rabbit Branch Creek and struck the pier.