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Mr. Mark Johnson <br /> May 31, 2018 <br /> Page 6 <br /> strength parameters for the various strata in the critical sections discussed above. Should the mining plans change or <br /> subsurface conditions vary from those portrayed in this letter,we should be contacted in order to re-evaluate the <br /> potential affects on permanent man-made structures. Stability analyses were run at the structure in question and were <br /> not run on failure surfaces closer to the highwall. Note also that surcharge loads due to temporary material stockpiles <br /> and overburden berms were not considered in the analysis. <br /> Please call with any questions or comments. <br /> Sincerely, <br /> Civil Resources, LLC <br /> —, ,, j,�," <br /> Gary Linden, P.G. <br /> Senior Engineering Geologist <br /> Attachments: Figure —Slope Stability Cross Sections Locations Plan (from mining plan) <br /> Figure —Slope Stability Cross Sections(from mining plan and XSTABL Output) <br /> Boring Locations <br /> XSTABL Model Outputs: Sections 1, 3,4, 6, 7, &8 <br /> REFERENCES <br /> Colton, R.B., 1978, "Geologic Map of the Boulder-Fort Collins-Greeley Area, Colorado", U.S.G.S. Map 1-855-G. <br /> J:1Bestway-213IInouyelDRMSIExhibits\Stability Analysis\Stability analysis report-Inouye.doc <br />