  H10894/99--OPR-K171-KR;  LOCATED AN OBSTRUCTION BY MULTIBEAM ECHOSOUNDER AND SIDE SCAN SONAR IN LAT. 29/27/34.27N, LONG 094/04/31.00W (NAD83) WITH A SHOALEST DEPTH OF 39 FEET MLLW.  NO DESCRIPTION WAS PROVIDED FOR THIS OBSTRUCTION.  (ENTERED 3/01 BY MB