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TABLE 1 <br />Southfield Mine <br />SEMI-ANNUAL SUBSIDENCE MONITORING DATA SUMMARY <br />PERIOD: JULY 1 -DECEMBER 31. 1997 <br />FLORENCE WATER LINE <br />Original Survey Dates: 5185, 10/87, 1/95, 5/96 <br />Previous Survey Date: 8197 <br />Latest Survey Dale: 11/97 <br />Change from Original Survey I Change from Previous Survey <br />Monument Latest Survey Vertical Horizontal Previous Survey Vertical Horizontal <br />No. Elevation (Ft) Chan e Ft Chang~Ft Elevation Ft Change (Ft) Change L <br />B 6,431.83 -0.17 0.65 6,431.86 -0.02 0.21 <br />C 6,477.31 -0.82 1.04 6,477.40 -0.09 0.19 <br />D 6,553.25 -1.22 0.31 6,553.39 -0.13 0.18 <br />E 6,630.94 -2.69 1.69 6,631.17 -0.23 0.23 <br />F 6,296.75 -2.15 0.36 6,296.77 -0.02 0.20 <br />G 6,261.31 -3.24 0.59 6,261.35 -0.04 0.20 <br />H 6,238.75 -1.53 0.22 6,238.82 -0.06 0.24 <br />I 6,205.62 -3.69 0.51 6,205.74 -0.12 0.44 <br />CV Joint NIA NIA N/A 6,258.88 N/A N/A <br />THOMPSON RANCH STRUCTURES <br />Original Survey Date: 5185 <br />Previous Survey Date: 8/97 <br />Latest Survey Date: 11197 <br />Change from Original Survey ~ Change from Previous Survey <br />Latest Survey Vertical Horizontal Previous Survey Vertical Horizontal <br />_Slructure Elevation (F~ Change (Ft) Change (Ft Elevation (Flt Chaff Ft Chan e~FtL <br />N. House 6,366.65 -0.70 0.27 6,366.78 -0.13 0.12 <br />S. House 6,371.18 -0.76 0.27 6,371.36 -0.17 0.06 <br />Barn 6,382.62 -0.78 0.11 6,382.77 -0.15 0.12 <br />NEWLIN CREEK POINT <br />Original Survey Date: 5/85, 12/96 <br />Previous Survey Date: 8/97 <br />Latest Survey Date: 11197 <br />Change from Original Survey <br />Latest Survey Vertical Horizontal <br />Elevation (Ftl Chanoe (FO Chanoe (F1 <br />Change from Previous Survey <br />Previous Survey Vertical Horizontal <br />Elevation (Ftl Chanoe (Ffl Change (Ft) <br />t~TE; N/A = No Data <br />