RedactedNarrative: On August 5, 2014 at approximately 1300 hours, operator was operating a Hallett Vessel approximately 1/4 mile from the shoreline near Sandy Cove on Lake Mead.  The Hallet Vessel had a tube in tow with 4 occupants.  One of the occupants on the tube partially fell off the tube.  She held onto the tube with half of her body off the tube bouncing up and down as the vessel continued forward.  Her body impacted the water with such force that caused her left femur to break.  The Hallet Vessel transported her back to Callville Bay Marina and awaited rescuers.  The patient was flown to University Medical Center by Mercy Air.  The vessel did not sustain any damage.