RedactedNarrative: V1 OPERATOR STATED HE WAS TRAVELING DOWNSTREAM  TOWARD THE CORPS BOAT RAMP FOLLOWING 2 SURFACE DRIVE BOATS.  V1 OPERATOR DECIDED TO PASS THE 2 VESSELS THAT WERE AHEAD OF HIM, WHILE BRAKING OVER THE WAKE OF ONE BOAT THE WAKE FROM THE OTHER BOAT CAUSED HIM TO LOSE CONTROL AND SENT HIM TOWARD THE BANK. HE STATED HE THROTTLED DOWN AND PULLED HIS KILL SWITCH LANYARD.  V1 THEN IMPACTED A ROOT BALL FROM A FALLEN TREE WHICH EJECTED HIM INTO THE WATER AND CAUSED V1 TO CAPSIZE.  HE WAS RESCUED BY ONE OF THE VESSELS HE TRIED TO PASS.