  H10804/98-99--OPR-K171-KR;  AN OBSTRUCTION WAS FOUND DURING HYDROGRAPHIC SURVEY OPERATIONS (INVOLVING SIDE SCAN SONAR AND MULTIBEAM SOUNDING) IN LAT. 29/28/24.60N, LONG. 093/37/52.80W (NAD83) WITH A SHOALEST SOUNDING OF 27 FEET (MLLW).