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TABLE i Southfield Mine SEMI-ANNUAL SUBSIDENCE MONITORING DATA SUMMARY PERIOD: JANUARY 1 THROUGH JUNE 3Q, 2002 FLORENCE WATER LINE Original Survey Dates: 05!85, 10!87, 01/95.05!96 Previous Survey Date: 04/02 Latest Survey Date: 06/02 Change from Original Survey (feet) Change from Previous Survey (feet) Morwment Latest Survey Vertical Horizontal Previous Survey Vertical Horizontal No. Elevation Cha a Cha a Elevation Chan Cha e 8 6,431.98 -0.02 0.82 6,431.95 0.03 0.04 C 6,477.58 ___ _ _-0.55 __ _ 1.3_1 __ _ _6,477.56 _ __ 0.02 ___ _ 0.04 D 6,553.78 _ -0.69 0.32 _ 6,553.75 __ 0.03 0.04 E 6,631.74 -1.89 1.86 6,631.65 0.09 0.02 -------------------- F 6,296.68 ----- -2.22 --- 0.67 ----------- 6,296.71 ----- -0.03 -- - 0.04 G 6,261.47 -3.08 0.77 6,261.40 0.07 0.03 H 6,239.01 -1.27 0.37 6,238.98 0.03 0.03 I 6,206.08 - -3.23 0.64 6,206.10 -0.02_ 0.03 _ CV Joint --- 6758J2 - ___ -2.87 0.23 6,258.72 --- - 0.00 _ 0.04 THOMl'SON RANCH STRUCTURES Original Survey Date: 05/85 Prevous Survey Date: 04!02 Latesf Surrey Date: 06102 Change from Original Survey (feet) Change from Previous Survey (feet) Latest Survey Vertical Horizontal Previous Survey Vertical Horizontal Structure Elevation Cha a Chan Elevation Cha a Gha e N. House 6,367.32 -0.03 0.37 6,367.34 -0.02 0.11 S. House 6,371.94 0.00 0.43 6,371.98 -0.04 0.09 Bam 6,383.38 -0.02 0.08 6,383.40 -0.02 0.07 NEWLIN CREEK POINT Original Survey Dete: 05!85, 12/96 Previous Survey Date: 04/02 Latest Survey Date: 06102 Change from Original Survey (feet) Change from Previous Survey (feet) Latest Survey Vertical Horizontal Previous Survey Vertical Horizontal Elevation Cha a Chan a Elevation Chan a Cha e Point 6,221.65 -0.33 0.08 6,221.63 0.02 0.03 NOTE: N!A = No Data