  H10835/98-99--OPR-K171-KR;  LOCATED AN OBSTRUCTION BY SIDE SCAN SONAR AND MULTIBEAM ECHOSOUNDER IN LAT. 29/14/54.79N, LONG. 094/29/26.24W (NAD83) WITH A LEAST DEPTH OF 45 FEET MLLW.  (ENTERED 9/01 BY MBH)