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• <br />SUBSIDENCE PERPENDICULAR PROFILE <br />18000E Monitoring Line <br />Subsidence (ft) <br />1.0 <br />0.0 <br />-1.0 <br />-2.0 <br />-3.0 <br />-4.0 <br />Survey Dates <br />+07 NOV 89 +08 NOV 89 x-24 AUG 90 <br />1.0 <br />0.0 <br />-1.0 <br />-2.0 <br />-3.0 <br />-4.0 <br />Cyprus Twentymile Coal Company <br />0 1 2 3 <br />Horizontal Distance (1000 ft) <br />