
 HISTORY
  UNKNOWN SOURCE--PILE APPEARED ON CHART 11317 PRIOR TO 1980 ì
EDITION. POSITION SCALED FROM INSET OF CHART 11317 (1:20,000). ì
POSITION: LAT. 28-36-46N, LONG. 96-33-58W. (ENT. 12/87 GM)
  H10411/91-92-- OPR-K228-AHP; DATA REJECTED IN CENTER