  H10835/98-99--OPR-K171-KR;  LOCATED AN OBSTRUCTION BY SIDE SCAN SONAR AND MULTIBEAM ECHOSOUNDER IN LAT. 29/15/57.33N, LONG. 094/31/27.57W (NAD83) WITH A LEAST DEPTH OF 42 FEET MLLW.  (ENTERED 9/01 BY MBH)