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<br /> <br />SUBSIDENCE PROFILE <br />15000E Perpendicular Monitoring Line <br />Subsidence (ft) <br />1.0 1.0 <br />Estimated Point of Zero Subsidence <br />0.0 0.0 <br />-1.0 -1.0 <br />-2.0 -2.0 <br />-3.0 -3.0 <br />Ribside, Down~ip Ribside, Up-dip <br />-4.0 -4.0 <br />0 1 2 3 <br />Horizontal Distance (1000 ft) <br />Survey Dates <br />-x-30 OCT 89 + 11 FEB 90 -^-23 AUG 90 <br />Cyprus Twentymile Coal Company <br />