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BLUE RIBBON COAL COMPANY <br /> PIEZOMETER P-6 <br /> 0 - <br /> -1 - <br /> -2 <br /> -3 - <br /> -4 <br /> LL <br /> x -5 <br /> w <br /> -6 <br /> O -7 <br /> I <br /> -8 <br /> W <br /> 0 <br /> -9 <br /> -10 <br /> -11 / <br /> -12 / <br /> -13 <br /> 6/89 7/89 8/89 9/89 10/89 11/89 12/89 1/90 <br /> DATE <br />