  H10890/00--OPR-K171-KR;  LOCATED AN OBSTRUCTION BY SIDE SCAN SONAR AND MULTI-BEAM ECHOSOUNDER IN LAT. 29/06/58.14N, LONG. 093/12/20.91W (NAD83) WITH A LEAST DEPTH OF 63 FEET (MLLW).    (ENTERED 12/00 BY MBH)