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<br />WEST ELK MINE SUBSIDENCE SEMI-ANNUAL REPORT <br />OCTOBER 1993 <br />SUBSIDENCE POINT # 61 60 <br />PRE-MINING NORTHING <br />SURVEY #1 FASTING <br />APR. 1985 <br />-------------- ELEVATION <br />---- --------- <br />PRE-MINING NORTHING <br />SURVEY #2 FASTING <br />OCT. 1985 ELEVATION <br />396278.84 <br />1441045.49 <br />7560.21 <br />396278.67 <br />1441045.31 <br />7560.29 <br />396275.94 <br />1441095.25 <br />7572.21 <br />396275.84 <br />1441094.99 <br />7572.23 <br />AVERAGE OF <br />PRE-MINING <br />SURVEYS <br />PRE-MINING <br />B SEAM <br />SURVEY #1 <br />OCT. 1991 <br />PRE-MINING <br />B SEAM <br />SURVEY #2 <br />JUNE 1992 <br />NORTHING <br />FASTING <br />ELEVATION <br />NORTHING <br />FASTING <br />ELEVATION <br />NORTHING <br />FASTING <br />ELEVATION <br />AVERAGE OF NORTHING <br />PRE-MINING FASTING . <br />B-SEAM <br />--------------- ELEVATION <br />--- --------- <br />--------------- <br />POST-MINING --- --------- <br />NORTHING <br />SURVEY #15 FASTING <br />OCT. 1992 ELEVATION <br />POST-MINING NORTHING <br />B-SEAM FASTING <br />SURVEY #4 ELEVATION <br />JUL. 1993 <br />POST-MINING NORTHING <br />B-SEAM FASTING <br />SURVEY #5 ELEVATION <br />OCT. 1993 <br />SUBSIDENCE (CURRENT) <br />from JUL. 1993 to OCT. 1993 <br />(-) Indicates Rise in Elevation <br />396278.76 396275.89 <br />1441045.40 1441095.12 <br />7560.25 7572.22 <br />59 <br />396272.53 <br />1441145.03 <br />7575.53 <br />396271.92 <br />1441144.51 <br />7575.55 <br />396272.23 <br />1441144.77 <br />7575.54 <br />396278.50 396275.57 396272.12 <br />1441045.23 1441094.84 1441144.66 <br />7559.77 <br />------------ 7571.81 <br />------------ 7575.23 <br />------------ <br />------------ <br />396278.43 ------------ <br />396275.48 ------------ <br />396272.02 <br />1441044.60 1441094.18 1441144.08 <br />7557.19 7569.28 7572.84 <br />396276.62 <br />1441043.98 <br />7553.29 <br />396273.74 <br />1441093.43 <br />7565.13 <br />396270.21 <br />1441143.13 <br />7568.72 <br />3.90 <br />4.15 <br />TOTAL SUBSIDENCE <br />from average pre-mining survey 6.96 7.09 <br />to Oct. 1993 <br />Page 1 <br />4.12 <br />6.82 <br />