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<br />WEST ELK MINE SUBSIDENCE SEMI-ANNUAL REPORT <br />OCTOBER 1993 <br />SUBSIDENCE POINT # W14 W13 <br />PRE-MINING NORTHING <br />SURVEY #1 EASTING <br />APR. 1985 ELEVATION <br />PRE-MINING NORTHING <br />SURVEY #2 EASTING <br />OCT. 1985 ELEVATION <br />AVERAGE OF <br />PRE-MINING <br />SURVEYS <br />PRE-MINING <br />B SEAM <br />SURVEY #1 <br />OCT. 1991 <br />NORTHING <br />EASTING <br />ELEVATION <br />NORTHING <br />EASTING <br />ELEVATION <br />PRE-MINING NORTHING <br />B SEAM EASTING <br />SURVEY #2 ELEVATION <br />JUNE 1992 <br />AVERAGE OF NORTHING <br />PRE-MINING EASTING <br />B-SEAM ELEVATION <br />POST-MINING NORTHING <br />SURVEY #15 EASTING <br />OCT. 1992 ELEVATION <br />395599.42 <br />1439818.57 <br />7477.94 <br />395601.20 <br />1439818.46 <br />7477.93 <br />395594.70 <br />1439918.57 <br />7448.96 <br />395595.98 <br />1439918.64 <br />7449.02 <br />W12 <br />395589.80 <br />1440018.69 <br />7382.91 <br />395590.92 <br />1440019.05 <br />7382.90 <br />------------ - <br />------------ - <br />395600.31 ----------- - <br />----------- - <br />395595.34 ----------- <br />----------- <br />395590.36 <br />1439818.52 1439918.61 1440018.87 <br />7477.94 <br />------------ - <br />------------ - 7448.99 <br />----------- - <br />----------- - 7382.91 <br />----------- <br />----------- <br />POST-MINING NORTHING 395600.29 395595.40 395590.37 <br />B-SEAM EASTING 1439819.58 1439919.53 1440019.15 <br />SURVEY #4 ELEVATION 7478.20 7449.28 7383.18 <br />JUL. 1993 <br />POST-MINING NORTHING 395600.18 395595.46 395590.52 <br />B-SEAM EASTING 1439819.47 1439919.50 1440019.55 <br />SURVEY #5 ELEVATION 7477.75 7448.81 7382.71 <br />OCT. 1993 <br />SUBSIDENCE (CURRENT) <br />from JUL. 1993 to OCT. 1993 0.45 0.47 0.47 <br />(-) Indicates Rise in Elevation <br />------------------ ------------ ------------ ------------ ------------ <br />------------------ ------------ ------------ ------------ ------------ <br />TOTAL SUBSIDENCE 0.18 0.18 0.19 <br />from average pre-mining survey <br />to Oct. 1993 <br />Page 1 <br />