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y 1 <br />WEST ELK MINE SUBSIDENCE SEMI-ANNUAL REPORT <br />OCTOBER 1993 <br />SUBSIDENCE POINT # SO S1 52 <br />PRE-MINING NORTHING <br />SURVEY #1 EASTING <br />APR. 1985 ELEVATION <br />PRE-MINING NORTHING <br />SURVEY #2 EASTING <br />OCT. 1985 <br />-------------- ELEVATION <br />---- ------------ - <br />----------- - <br />----------- - <br />----------- <br />-------------- <br />AVERAGE OF ---- ------------ - <br />NORTHING ----------- - ----------- - ----------- <br />PRE-MINING EASTING <br />SURVEYS <br />-------------- ELEVATION <br />---- ------------ - <br />------'---- - <br />----------- - <br />----------- <br />-------------- <br />PRE-MINING ---- ------------ - <br />NORTHING ----------- - <br />392820.12 ----------- - <br />392920.18 ----------- <br />393019.92 <br />B SEAM EASTING 1441842.87 1441848.67 1441855.31 <br />SURVEY #1 ELEVATION 7947.72 7955.60 7954.43 <br />OCT. 1991 <br />-------------- <br />---- ------------ - <br />----------- - <br />----------- - <br />----------- <br />-------------- <br />PRE-MINING ---- ------------ - <br />NORTHING ----------- - <br />392820.30 ----------- - <br />392920.16 ----------- <br />393019.76 <br />B SEAM EASTING 1441843.53 1441849.39 1441855.90 <br />SURVEY #2 ELEVATION 7947.72 7955.65 7954.54 <br />JUNE 1992 <br />-------------- <br />---- ------------ - <br />----------- - <br />----------- - <br />----------- <br />-------------- <br />AVERAGE OF ---- ------------ - <br />NORTHING ----------- - <br />392820.21 ----------- - <br />392920.17 ----------- <br />393019.84 <br />PRE-MINING EASTING 1441843.20 1441849.03 1441855.61 <br />B-SEAM <br />-------------- ELEVATION <br />---- ------------ - 7947.72 <br />----------- - 7955.63 <br />----------- - 7954.49 <br />----------- <br />-------------- <br />POST-MINING ---- ------------ - <br />NORTHING ----------- - ----------- - ----------- <br />SURVEY #15 EASTING <br />OCT. 1992 <br />-------------- ELEVATION <br />---- ------------ - <br />----------- - <br />----------- - <br />----------- <br />-------------- <br />POST-MINING ---- ------------ - <br />NORTHING ----------- - <br />392819.69 ----------- - <br />392919.76 ----------- <br />393019.39 <br />B-SEAM EASTING 1441842.70 1441848.66 1441855.29 <br />SURVEY #4 ELEVATION 7947.45 7955.36 7954.22 <br />JUL. 1993 <br />-------------- <br />---- ------------ - <br />----------- - <br />-----'----- - <br />----------- <br />-------------- <br />POST-MINING ---- ------------ - <br />NORTHING ----------- - <br />392820.04 ----------- - <br />392920.13 ----------- <br />393019.67 <br />B-SEAM EASTING 1441843.36 1441849.24 1441855.87 <br />SURVEY #5 ELEVATION 7947.40 7955.29 7954.13 <br />OCT. 1993 <br />-------------- <br />---- ------------ - <br />----------- - <br />----------- - <br />----------- <br />-------------- <br />SUBSIDENCE ---- ------------ - <br />(CURRENT) ----------- - ----------- - ----------- <br />from JUL. 1993 to OCT. 1993 0.05 0.07 0.09 <br />(-) Indicates Rise in Elevation <br />TOTAL SUBSIDENCE <br />from average pre-mining survey 0.32 0.34 0.36 <br />to Oct. 1993 <br />Page 1 <br />