RedactedNarrative: V1 was laying along side the upstream dock at island park with the bow facing into the current. The vessel was manually being held to the dock by the female owner/occupant who took the operators seat to hold the vessel to the dock.  The male owner/operator of the vessel was in the parking lot retrieving a truck and trailer to load out the boat. 
  
  V2 approached the same dock from the stern of v1 to pick up a passenger.  V2 was traveling at a speed faster than was proper for a vessel launching area as it came towards the dock.  The waiting passenger jumped into the bow area of v2 before the boat had stopped. V2's operator had placed the boat into reverse to avoid striking the dock, & backed the vessel into position to proceed upstream at an idle speed.  
  
  As v2 departed, large waves had developed from the incoming wake & reverse operation. This wave action came into the launch area causing the dock & v1 to rise up and down in a violent manner. V1's female occupant attempted to control the movement of the vessel and lost contact with the dock and grabbed the starboard gunwale of the boat. The gunwale came into contact with the deck of the dock causing a crush injury to the woman's right thumb.  
  
  The victim could no longer hold onto the dock & v1 began floating downstream. Witnesses on the dock retrieved v1 and assisted the owner to get the boat onto the trailer. The victim was transported to sartori hospital in cedar falls by her husband but was then later transferred by ambulance to university of iowa hospital.  Due to the extent of the injury, a partial amputation of the distal phalange of the right thumb was needed.
  