  UNKNOWN SOURCE--  DEPTH OVER CRIB 25 FT WAS APPLIED BEFORE 1972 TO THE LAKE SURVEY CHART BEFORE NOS TOOK OVER THE CHART.  (ENTERED 4/05 CEH)
  F00502/06-- OPR-Y387-NRT4-05; Item was found during the SSS investigation.  With SBES, a least depth of 32 f