  UNKNOWN SOURCE--  DEPTH OVER PWI CRIB 15 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; The crib was located at 41/37/57.3-87/12/10.2 with SSS and SBES.  The crib