  H10805/98-99--OPR-K171-KR;  AN OBSTRUCTION WITH A LEAST DEPTH OF 29 FEET MLLW WAS FOUND BY SIDE SCAN SONAR AND MULTIBEAM IN LATITUDE 29/14/12.66N, LONGITUDE 094/43/59.28W (NAD83) IN GENERAL DEPTHS OF 35 FEET.  THE HYDROGRAPHER STATED THAT THIS OBSTRUCT