RedactedNarrative: Operator of Vessel A was operating the 2018 Sea Doo Spark PWC at Oliver Reservoir on July 24th, 2021. At approximately 1830, the operator stated she was coming into where the rest of the family and other individuals were swimming in the swimming area. The operator stated she was traveling at approximately 20 mph and couldn't slow down. She then attempted an evasive maneuver by turning left (port side) however, it was too late. she struck Injured Person 1 with the back right side (starboard stern) of the jet ski. he was struck in the head, neck, and back. He was swimming at the time when he was struck. He was inside the buoyed off swimming area of Oliver Reservoir. The operator of vessel A then jumped off the PWC and began rendering aid to injured person 1 along with other witnesses. The operator stated that the injured person 1 went in and out of consciousness while they were in the water. The operator and others then got the injured person onto the shore and continued rendering aid until EMS and Kimball County Sheriff's Office arrived. I then was dispatched by the Nebraska State Patrol. Injured person 1 was flown by Air Link to Regional West Hospital in Scottsbluff.