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South Permit Boundary <br />Bawie #2 Mine <br />Paonia, Colorado <br />PROJECT NO. 24004 <br />A five-foot diameter rock was analyzed for each profile. The starting zones for <br />• <br /> <br />the rocks allowed for drop heights of up to 5 feet, which we believe is greater <br />than the likely drop heights for most of the slope with the exception of where the <br />rocks initiate from the outcropping sandstone unit The profiles were chosen to <br />represent likely critical trajectories and are shown on Figure A-2 as lines S11, <br />S12, S13 and S14. Additional refinement was conducted on these profiles to <br />incorporate our field observations and to reflect our experience in this subject. <br />Analysis points were placed at the permit boundary and at critical points on the <br />profile to assess the validity of the model. A summary of the CRSP results is <br />provided below. Detailed CRSP input and output data is included in Appendix B. <br />Tables 1 through 4 summarize the bounce heights and impact energies for each <br />of the analysis points. <br />TABLE 1 <br />CRSP SUMMARY FOR SECTION S-11 <br />BOWIE #2 MINE <br /> <br />ANALYSIS POINT ROCK SIZE BOUNCE HEIGHT <br />PROBABILITY ENERGY <br /> (in feet) (in feet) (ft-Ibs) <br />1 Average 4.83 98°k 1,905,848 <br />Bottom of Sandstone 5 <br /> <br />Led ~ <br />X=569 <br />Maximum 14.07 75% t,568,560 <br /> r~o~ 1,403,665 <br />2 Average WA 98°k WA <br />Mid-slo <br />e near South 5 <br />p <br />Pernik Boundary 75% WA <br />X=1850 Maximum N/A 50% WA <br />g Average WA 98°k WA <br />Bottom of slope at 5 <br />Highway 133 75% WA <br />X=2700 Maximum N/A 50°k WA <br />