VESSEL 1 WAS A 10' KAWASAKI PERS. WATERCRAFT WITH 1 PERSON ON BOARD.  VESSEL 2 WAS A 18'10" SEARAY OPEN MOTORBOAT WITH 3 PEOPLE ON BOARD AND 1 PERSON ON A TUBE.  OPERATOR 1 STATED THAT THEY WERE SWITCHING OPERATORS OF THE BOAT WHEN HE LOST CONTROL OF THE JET SKI AND STRUCK TUBER.  OPERATOR 1 WAS TRAVELING LESS THAN 10 MILES PER HOUR.  TUBER LOST CONSCIUSNESS FOR LESS THAN ONE MINUTE.  TUBE'S LEFT SIDE PELVIC AREA WAS HURTING, TUBER WAS PUT INTO A C COLLAR AND GIVEN OXYGEN.  FIRE CREW ASSISTED PARK RANGER IN LOADING TUBER ON A BACK BOARD AND WAS TRANSPORTED BY HELICOPTER TO HOSPITAL.  NO OTHER INJURIES WERE REPORTED AND NO DAMAGE WAS REPORTED TO EITHER VESSEL.
BOULDER CITY                  