RedactedNarrative: INVESTIGATED BY NATIONAL PARKS SERVICE.  AREA OF THE ACCIDENT WAS APPROX 100 FEET SOUTH OF THE POINT PICNIC AREA AND APPROX 200 YARDS SOUTHWEST OF DAM.  VESSEL 1 SANK DUE TO TRANSOM FAILURE APPARENTLY CAUSED BY ROTTEN PLYWOOD.  TRANSOM WAS RECOVERED WITH OUTBOARD MOTOR ATTACHED DURING RECOVERY OPERATION.  OPERATOR, PASSENGER 1 AND VICTIM 1 ENTERED THE WATER WITH NO PFD'S WHEN VESSEL 1 BEGAN SINKING. SUBJECTS WERE ATTEMPTING TO SWIM TO "THE POINT" WHEN OPERATOR OF ANOTHER VESSEL (WITNESS 1) SAW THEM IN THE WATER.  VESSEL 1 OPERATOR AND PASSENGER 1 WERE RESCUED BY WITNESS 1.  WITNESS 1 STATED THAT VICTIM 1 WAS APPROX 25 TO 30 YARDS FROM THE SINKING VESSEL WHEN HE WENT UNDER THE WATER AND COULD NOT BE LOCATED.  VICTIM 1 WAS LOCATED USING SIDE SCAN SONAR AND RECOVERED ON 04/07/2014 BY OHP MARINE ENFORCEMENT SECTION AND OHP UNDERWATER SEARCH AND RECOVERY TEAM.