RedactedNarrative: Strong lateral wave pushed our raft into a strong pour over hole above half way through Nevills Rapid. Pour over was not visible from upstream. Our boat captain tried to avoid the pour over hole, but we it caught the front side of our raft and sucked the downstream tube in. 
  
  We all moved quickly to high side and were able to avoid flipping the raft. When moving to highside my (uninjured occupant) left shoulder hit the left side raft frame at the same time that another wave hit that upstream side, amplifying the impact. 
  
  When I moved back into position at the front of the boat, my left arm had lost all ability to move. I was able secure myself in the raft with my right hand and arm and out boat captain was able to move us quickly to the shore at Nevills Camp. After assessing my injury with two experienced participants we made the call to evacuate. 
  
  Park service paramedic agreed in our assessment and I was transported to flagstaff medical center. X rays showed no broken bones and ER doc diagnosed as severe nerve damage resulting in loss of strength and movement in arm. Prognosis is full recovery after rest and physical therapy. 
  
  No damage to vessels or personal property incurred on the river. Financial damage is unclear, but will likely be significant with ambulance rides and ER care required. I do have health and travel insurance that may cover some costs.
NameOfBodyOfWater: COLORADO RIVER-GRAND CANYON
NearestCityTown: Tusayan                       