RedactedNarrative: On 5/10/20, Subject launched his 16'' infinity boat at the kingman county boat ramp on the west side of the cheney reservoir dam. Operator had purchased the boat on 5/9/20. Operator said that after he launched the boat he headed east on the lake to see how it would perform. 
  
  As operator turned south to turn back toward the boat ramp, a wave came over the stern of the boat, filling it partially with water. A second wave came and swamped the boat and the boat proceeded to sink. At this time operator girlfriend, who was on shore at the boat ramp, called 911. Cheney park rangers and ems were dispatched to the location. Operator was able to grab his life jacket and put it on before he made the 100 yard swim to shore. 
  
  Ems arrived on the scene as well as park ranger. They advised dispatch that operator was swimming back to shore. Upon arrival to shore, ems checked operator and he was uninjured. I arrived on scene with the patrol boat at this time and received the above information.s