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1 <br /> <br />Item Predicted impact in <br />ermit a lication <br />Observed impact ~ <br />Prediction accurate. <br /> Maximum 18.4 ft. <br /> in two-seam <br />Vertical mining azeas. Although subsidence <br />subsidence Less than 1 ft. displacements have not been <br />magnitude near panel edges Visual observations are used for surveyed since 1999, visual <br /> in single-seam <br />verifying the conceptual observations described in the <br /> minin azeas. 2006 report indicate <br /> subsidence model, rather than <br /> <br />Horizontal <br />Maximum <br />quantitative monitoring. subsidence displacements and <br />the angle of draw have <br />displacement horizontal strain probably not significantly <br />magnitude of 3.9% exceeded the predicted values. <br />Angle of draw 8 - 21 degrees <br /> <br />USFS roads Rockfalls No rockfalls or cracking found in <br />Yes <br /> cracking visual survey for 2006 report <br /> No draining by subsidence cracks <br />USFS ponds Draining found in visual survey for 2006 Yes <br /> re ort. <br />