RedactedNarrative: I, United States Park Ranger, state that on 9 july 2019 while on duty in Glen Canyon National Recreational Area. I was dispatched to the main launch ramp at approximately 1900 hours.  Rangers were also on scene for a back injury that occurred just north of the "Castle Rock Cut".
  
  The vessel was traveling North just past the "castle rock cut", either a houseboat or a tour boat according to the passenger's created big swells in the lake.  One of the passenger's described the vessel going up the first one and down the other side smoothly, then the vessel went up the second swell and landed on the other side smoothly, then the vessel went up the third swell and "cased" the fourth.  With the passengers hand signals "cased" meaning the vessel landed hard on the upward slop of the fourth swell.
  
  OPERATOR stated that he powered the vessel down to neutral before they went over the third swell.  OPERATOR was at the helm, and victim was seated on the port bow facing the starboard when the vessel hit the fourth swell and injured her back.  She was flown out from the scene by Classic Lifeguard Medical helicopter to a higher care facility.
  