RedactedNarrative: V1 WAS TRAVELING SOUTH ON THE CADDO RIVER WHEN THEY CAME UPON A GROUP OF LARGE ROCKS STRETCHING ACROSS THE RIVER. BOTH THE OPERATOR AND PASSENGER (VICTIM) STATED THEY DID NOT SEE THE ROCKS UNTIL V1 WAS UPON THEM.  V1 STRUCK THE ROCKS CAUSING IT TO CAPSIZE AND BOTH OCCUPANTS WERE EJECTED. THE VICTIM'S RIGHT LEG BECAME TRAPPED BETWEEN TWO OF THE ROCKS.  THE OPERATOR WAS ABLE TO FREE THE VICTIM AND CALLED FOR HELP.  VICTIM WAS TRANSPORTED TO HOSPITAL WHERE SHE WAS DIAGNOSED AS HAVING TORN HER ACL AND MENISCUS.