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x, <br /> <br />Item Predicted impact in <br />ermit application <br />Observed impact <br />Prediction accurate. <br /> Maximum 18.4 ft. <br /> in two-seam <br />Vertical mining areas. Between 2000 and 2007 visual Although subsidence <br />subsidence Less than 1 ft. observations are used for displacements have not been <br />magnitude near panel edges verifying the conceptual surveyed since 1999, visual <br /> in single-seam subsidence model, rather than observations described in the <br /> mining areas. quantitative monitoring. The Fall Fall 2007 report indicate <br /> 2007 report included data from a subsidence displacements and <br />Horizontal Maximum pre-mining surveys over panel E- the angle of draw have <br />displacement horizontal strain 1 and the thalweg of the Dry Fork probably not significantly <br />magnitude of 3.9% of Minnesota Creek. 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 Fall 2007 report <br /> No draining by subsidence cracks <br />USFS ponds Draining found in visual survey for Fall Yes <br /> 2007 report.