RedactedNarrative: ON 3/18/17 AT APPROX. 1727 HOURS, VESSEL ONE WAS LAUNCHING  WHEN ONE OF THE VESSELS PONTOONS STARTED TO TAKE ON WATER.  THE OPERATOR OF VESSEL ONE ATTEMPTED TO RETRAILER THE VESSEL WITH THROTTLE WHEN THE THROTTLE STUCK IN GEAR.  VESSEL ONE OVER THROTTLED PASSING OVER THE TRAILER CAUSING IT TO COLLIDE WITH VESSEL TWO WHICH WAS TRAILERED AND EXITING THE WATERWAY.  VESSEL TWO OCCUPANT WAS RIDING ON THE TRANSOM OF THE VESSEL AND SHE WAS STRUCK BY VESSEL ONES RIGHT PONTOON CAUSING A LACERATION TO HER LEFT THIGH.  THE LAKE HAVASU CITY FIRE DEPARTMENT RESPONDED TO THE SCENE AND victim WAS TRANSPORTED TO HAVASU REGIONAL MEDICAL CENTER WHERE SHE WAS ADMITTED FOR FURTHER TREATMENT.