  H10805/98-99--OPR-K171-KR;  AN OBSTRUCTION WITH A LEAST DEPTH OF 40 FEET MLLW WAS FOUND BY SIDE SCAN SONAR IN LATITUDE 29/15/39.50N, LONGITUDE 094/38/36.60W (NAD83) IN GENERAL DEPTHS OF 43 FEET.  (ENTERED 1/00 BY MBH)