RedactedNarrative: VESSEL 1 WAS APPROXIMATELY 540 FEET NORTH OF THE END OF ASH STREET DRIFTING WEST TO CHECK LIMB LINES IN THE WASHITA RIVER.  VESSEL 1 WAS SWEPT AWAY BY RAPIDLY MOVING WATER, CAUSING VESSEL 1 TO STRIKE TREE WITH THE STARBOARD BOW.  OPERATOR AND THE 2 PASSENGERS WERE EJECTED AND THE VESSEL CAPSIZED.  AREA OF IMPACT WAS APPROX 540 FEET NORTH OF THE END OF ASH STREET AND APPROX 65 FEET EAST OF THE WEST RIVER BANK.  VESSEL 1 SANK AND WAS LOST AND NOT RECOVERED.