RedactedNarrative: On July 31, 2020, at approximately 1715 hours I, Game Warden 1, was on patrol via vessel on Lake Mead, Clark County, Nevada. At this time, I was notified of a “prop chop” that had taken place at the safety line by the Hoover Damn. Better known as Black Canyon. 
  
  Game Warden 2, who was on a separate vessel, and I ran an expedited response from Callville Bay to Black Canyon. The distance was approximately 10 miles via boat. Upon our arrival we were advised by a witness that the vessel had left the area. Warden 2 and I checked multiple location before determining that the vessel had possibly passed us traveling the opposite direction while we were enroute. It was determined that the vessel had been brought to Callville Bay.
  
  Upon our arrival at Callvile Bay, at approximately 1754 hours, a black and white vessel was spotted at the courtesy dock. The victim of the “prop chop” had major lacerations to both his lower legs. The victim was conscious and alert with knowledge of what had happened. Warden 2 was able to bandage both wounds to the best of his ability. I was able to talk to the driver of the vessel when the accident took place. The driver was identified as Operator. Mercy Air was able to land on the Callville Bay Launch ramp. We loaded the victim of the incident, later identified as Injured, on the helicopter. Mercy Air transported Injured to the United Medical Center trauma unit. A total of four (4) adults and three (3) children were on board when the accident took place.
  
  While Injured was being loaded onto the helicopter Operator retrieved his vehicle and began to back it down the launch ramp to retrieve the vessel. Warden 2 and I began conducting interviews on the two other adult witnesses. 
  
  A female witness, identified as Passenger 4, explained that while they were in Black Canyon both females were in the water when Passenger 4's friend, later identified as Passenger 3, began to float away. Injured jumped into the water to retrieve Passenger 3. At some point during the retrieval of Passenger 3 Operator had started the vessel and had gotten the tow rope stuck in the prop. Passenger 3 and Passenger 4 were placed back on the vessel while Injured worked on getting the rope unstuck. At some point during the attempt to free the rope Operator again placed the vessel in gear in which this was when the propeller struck Injured. With help from other vessels Injured was loaded onto the vessel and the rope was freed from the prop. Operator then transported Injured to the Callville Bay dock. 
  
  Operator was able to retrieve his vessel and was instructed to park and explain what happened. During Warden 2's interview he could notice signs indicating Operator had been drinking alcoholic beverages. Once asked about drinking Operator admitted to the drinking. Warden 2 conducted a seated battery of Field Sobriety Tests on Operator. Operator was unable to pass the tests. Warden 2 placed Operator under arrest per NRS 488.420, Operating Under the Influence causing substantial bodily harm among other charges not related to the vessel.