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EAR COAL COMPANY - SUBSIDENCE MONITORING SYSTEM DATABASE <br /> COORDINATES: INCREMENTAL CHANGES: CUMULATIVE CHANGES: <br /> -------------------------------- <br /> DATE STATION NORTHING EASTING ELEVATION NORTH EAST ELEV. NORTH EAST ELEV. <br /> ------------------------------------------------------------------------------------------------------------- <br /> Jul-87 U18 404313.92 1442360.16 6161.19 0.11 0.15 -0.05 0.14 0.09 2.57 <br /> Oct-87 U18 404313.97 1442360.D9 6161.18 0.05 -0.07 -0.01 0.19 0.02 2.56 <br /> Jun-BB U18 4D4313.91 1442360.24 6161.13 -0.06 0.15 -0.05 0.13 0.17 2.51 <br /> Nov-88 U18 404313.99 1442360.20 6161.15 0.08 -0.04 0.02 0.21 0.13 2.53 <br /> MEAN: <br /> COEFF.OF VARIATION: <br /> Aug-85 U19 404403.85 1442179.52 N.A. 0.00 0.00 0.00 0.00 0.00 0.00 <br /> Jul-86 U19 404403.93 1442179.46 6127.40 0.08 -0.06 0.08 -0.06 <br /> Nov-B6 U19 404403.93 1"2179.46 6127.40 0.00 0.00 0.00 0.08 -0.06 0.00 <br /> Jul-87 U19 404404.05 1442179.53 6127.26 0.12 0.07 -0.14 0.20 0.01 -0.14 <br /> Oct-87 U19 404404.12 1442179.47 6127.30 0.07 -0.06 0.04 0.27 -0.05 -0.10 <br /> Jun-88 U19 404404.01 1442179.59 6127.19 -0.11 0.12 -0.11 0.16 0.07 -0.21 <br /> Nov-88 U19 404404.12 1442179.50 6127.20 0.11 -0.09 0.01 0.27 -0.02 -0.20 <br /> MEAN: <br /> COEFF.OF VARIATION: <br /> Aug-85 U23 <br /> Jul-86 U23 <br /> Nov-86 U23 <br /> Jul-87 U23 404212.45 1441756.40 6143.78 0.00 0.00 0.00 0.00 0.00 0.00 <br /> Oct-87 U23 404212.44 1441756.41 6143.81 -0.01 0.01 0.03 -0.01 0.01 0.03 <br /> Jun-88 U23 404212.50 1441756.44 6143.78 0.06 0.03 -0.03 0.05 0.04 0.00 <br /> Nov-88 U23 404212.51 1441756.44 6143.79 0.01 0.00 0.01 0.06 0.04 0.01 <br /> MEAN: <br /> COEFF.OF VARIATION: <br /> f <br />