  H10850/98-99--OPR-K171-KR;  OBSTRUCTION WITH A LEAST DEPTH OF 51 FEET (MLLW) IN GENERAL SURROUNDING DEPTHS OF 53-54 FEET WAS FOUND IN LAT. 29/06/17.36N, LONG. 094/23/41.60W (NAD83).  (ENTERED 5/01 BY MBH)