RedactedNarrative: On 6/3/16 at approximately 10:55am a 21.5'' Aquatron speedboat bearing IL registration : IL4259JA was travelling dowstream along the Kankakee River from the DesPlaines Conservation Area launch.  Two female occupants were in tow on innertubes.  One of the female occupants fell off of the tube and Operator1 turned the boat around to retrieve the downed tuber.  While the boat motor was in neutral, both victim and the other occupant swam back to the boat.  As Victim attempted to climb aboard the ladder, a wave from the boats wake rocked the boat up and down.  Victim kicked her legs to push away from the stern of the boat at which time her lower left leg made contact with an unknown fixed object under the boat.  (believed to be the propeller or protruding transducer mount).  When Victim''s leg made contact with the object it caused a laceration which eventually required 21 stitches to repair.