  H10741/97--OPR-G309-WH-96;  AN OBSTRUCTION WITH A LEAST DEPTH OF 32 FEET WAS LOCATED IN POSITION 33 50 48.00 N. 078 04 43.56 W (NAD 83). DIVERS FOUND A ROCK 6-8 FEET IN DIAMETER  RISING APPROXIMATELY 3 FEET OFF THE BOTTOM. HYDROGRAPHER RECOMMENDED CHAR