RedactedNarrative: On 6/14/2015 at about 18:05 a boat underway collided with the rear left side of another boat (not under way) and then into a cliff wall at Canyon Lake near Mushroom Rock. Three people on Vessel #1 were injured and transported to the hospital.  
  
  Vessel #1 was a white, 1984, 19'', Bayliner, ski boat. Vessel #2 was a yellow, 1997, 16'', Yamaha, ski boat. 
  
  Subjects know each other from their work. They had met earlier in the day on the lake and were following each other preceding the accident. Operator1 was following Operator2. Operator2 went around a curve in the lake. He stopped his boat after the curve, but lost sight of Operator1 for a short time. Operator1 came up behind Operator2 and struck his vessel on the left rear corner causing only a small amount of damage. Operator1 then swerved sharply to the right and hit the solid rock cliff face that makes up the shore in this part of the lake. Operator1 flew onto the floor of the open bow, and V1 subject1 was ejected from the vessel. The boat started going in circles and subject was able to shut the boat off. V1 subject1 was able to get back in the boat. 
  
  Operator1 was in and out of consciousness and complaining of left arm and shoulder pain. He was transported to Scottsdale Osborn hospital by Native Air. V1 subject2 and V1 subject1 were transported to a hospital by AMR ambulance. 
  
  There were several opened cans of Budlight beer on Vessel #1. Operator1 was given a preliminary breath test and it showed him to have a blood alcohol level of 0.249%.
  
  See IR #15-014546 taken by Deputy in reference to an OUI investigation reference this accident. 
  
  The damage of Vessel #1 was extensive. The front was all broken in with the fiberglass broken and cracked. The steering console was broken off and pushed forward. It appeared that Vessel #1 was traveling at high speed when it hit the cliff. 
  
  Pictures were taken of the scene and both boats. 
  
  Nothing further.