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Varra- Coulson - Fourth Stability Analysis <br />Page 3 of 3 <br />July 9, 2014 <br />the accuracy of the safety factor produced by the Applicant's model (1.539). Therefore, the <br />accuracy of the Applicant's analysis is confirmed. <br />Critical Slope Area with bedrock pit floor material <br />Typical Critical Slope Area with 3:1 to 1.25:1 Mine Slope with 10' offset, bedrock pit <br />floor material and topsoil stockpile loading <br />The Applicant's cross section was duplicated for verification to represent the worst case <br />scenario for this slope configuration. The safety factor produced by Galena is lower (1.33) than <br />the safety factor produced by the Applicant's model (1.406); however it is above the required <br />safety factor of 1.3. Therefore, the accuracy of the Applicant's analysis is confirmed. <br />If you have any questions, please contact me at 303 - 866 -3567 Ext. 8124. <br />Sincerely/ <br />Peter S. Hays <br />Environmental Protection Specialist <br />Enclosures <br />Cc: Tom Kaldenbach - Division of Reclamation, Mining & Safety <br />Joby Adams - AWES, LLC (by email) <br />