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August 31, 2004 <br />Bowie No. 1 Mine Subsidence <br />Survey date August, 2004 <br />The following table shows the relative change in each subsidence station, <br />For the values based on the GPS Surveys. <br />• <br />From December 2003 to August 2004 <br />Station Bearing Distance Elevation <br />Sta B N 73 11' W 0.04 + 0.02 <br />Sta C N 51~ 51' W 0.04 + 0.02 <br />Sta E S 74 03' E 0.01 + 0.01 <br />PL-1 N 81~ 52' W 0.04 + 0.02 <br />PL-2 S 45 00' W 0.03 + 0.03 <br />PL-3 N 25 12' W 0.04 + 0.01 <br />PLC N 82 52' W 0.01 - 0.03 <br />PL-5 S 00 00' W 0.04 0.00 <br />PLC S 78 28' E 0.05 - 0.04 <br />PL-7 S 77 54' E 0.04 + 0.04 <br />Sta 6 N 52 08' E 0.02 + 0.05 <br />Sta 14 N 85 13' E 0.04 + 0.02 <br />Sta 15 N 71~ 50' E 0.07 - 0.06 <br />The following table shows the relative change in each subsidence station, <br />For the values based on the GPS Surveys. <br />From June 2003 to August 2004 <br />. <br />Sta 16 N 34 20' E 0.10 - 0.05 <br />DH-55 N 81~ 15' E 0.04 + 0.07 <br />DHSS S 78° 19• yy 0.03 - 0.02 <br />DH-66 N 48 39' E 0.03 - 0.02 <br />DH~B S e~° 28• E 0.05 + 0.05 <br />STA-95 S 2fi OT E 0.06 + 0.02 <br />STA-99 S 43 i 6' E 0.02 + 0.05 <br />STA-81 N 43 4T W 0.07 + 0.07 <br />STA-82 S 83 50' E 0.04 + 0.04 <br />STA-83 S 56 01' E 0.06 + 0.12 <br />Changes in the coordinate values from survey to survey may be due to: <br />-Actual changes due to subsidence activity. <br />- Random errors inherent to any field survey. <br />If you have any questions please call <br />Stephen B. Cragg <br />C~ <br />S1-23 <br />