RedactedNarrative: Single vessel accident with damage and single passenger injury report received by Ranger at the Willow Beach marina fuel dock.  Injured party was transported by a Good Samaritan vessel to the fuel dock.  Initial BLS care of Victim provided by self with request for ALS care via Lake Mead EMS unit Rescue 4 staffed by Advanced medical technician and paramedic due to severity of avulsion and possible concussion.  
  
  Victim stated she was standing in the center of the vessel while cruising at a speed between 10 - 15 mph when Operator struck a large rock formation just below the water surface.  She continued to describe Operator was approaching a right bend in the river while travelling south along the Nevada shoreline near RM 43.  Victim stated the collision caused her to fall forward striking her head on the vessels windshield (impact and shatter damage present on vessel).  Care of Victim was transferred to Rescue 4 staff and she was transported to the Saint Rose DE lima emergency room in Henderson NV.  The accident involved vessel was borrowed and operated by OPERATOR.  Operator was able to return the vessel to the fuel dock under its own power and recover it with trailer.  The vessel sustained heavy fiberglass damage with protrusion to the bow and rock strike damage to the propeller.