Dane Marriott, 30, of Vernal, Utah, was injured Sunday, July 6th, when he dove into the Green River during a rafting trip through the park. Group members noticed Marriott floating face-down in the water but thought he was playing a joke on his friends. After a few minutes, they pulled him from the water and found that he was unresponsive and not breathing. Park employees Serena Dennis and Jim Linville were working a short distance away and heard calls for help. Upon arriving at the scene, Dennis, a wilderness first responder, and Linville, a Routt County emergency medical technician, revived and stabilized Marriott. With assistance from employees of park concessioners Outward Bound and Holiday Expeditions, Dennis and Linville transported Marriott eight miles downriver to an ambulance at the Split Mountain boat ramp. Marriott was taken to Ashley Valley Regional Medical Center, where he was airlifted to Salt Lake City.