 HISTORY
  H-10722/97--OPR-G301-AHP;  A SUBMERGED PIPE WITH A LEAST DEPTH OF 10 FT MLLW WAS LOCATED.  UPDATED 8/99 MCR
  H11861 - OPR-G347-NRT2-08; Near nadir sounding on a vertical pipe. Recommend retaining 10ft dangerous obstn (Updated 5/1/09 KAK)