RedactedNarrative: Three females rented a canoe from the park’s concession stand.  The Injured female was in the front wearing a life jacket, female in the center was also wearing a life jacket, and the third female in the back was not wearing a lifejacket, but had one in the canoe.  
  
  While out on the water, the center female was changing positions when the center support bar rivets broke causing a sudden shift in weight in the canoe causing it to capsize.  All on board fell from the canoe into the water and the Injured female dislocated her right shoulder in the process.  They were able to safely make it back to shore where they sought help.