RedactedNarrative: On June 29, 2014, at approximately 1359 hours, Lake Mead NRA Interagency Communications Center (LMICC) received a 911 phone call from a vessel operator near South Cove. The operator stated a party member had possibly broken his hip or leg while being towed on a tube.  Due to distance and response time of rangers, Lake Mohave Ranchos Fire Rescue was requested to respond as the primary EMS provider.  At 1459 hours, Ranger and I responded from the Temple Bar Marina towards South Cove via vessel 11B.  At 1527 hours, Ranger and I arrived at the South Cove courtesy dock and observed Lake Mohave Ranchos Fire Department personnel providing patient care to VICTIM.  I conducted a hasty field interview with VICTIM at the South Cove courtesy dock while he was being stabilized and assessed by Lake Mohave Ranchos Fire Department.  I conducted a field interview with OPERATOR and obtained VICTIM''s vessel information at the shoreline of Sandy Point.  No damage occurred to vessel or ski/tube equipment.  VICTIM stated that they were out boating and skiing in the area of Sandy Point and South Bay with his friend and their kids. VICTIM stated his friend OPERATOR was operating the vessel (2002 red, white, and black Chaparral) while towing him and three children on the ski tube. He stated while in a wide turn, his leg came off of the tube with his foot going into the water. He further stated this cause him to be dragged off of the tube with sharp pain and a popping sensation in his hip.