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the Toe of the Designed Slopes. This study investigated potential slope stability <br /> issues related to stopes that will be exposed in the toe of the east wall of the Cresson <br /> Mine and the risk they may pose to overall wall stability. <br /> • (October 2012) Evaluation of Dike Plane Shear Sliding Potential—East Cresson <br /> 9525 Ramp. This report summarized the analysis of potential plane shear sliding on a <br /> phonolite dike which was striking parallel to the pit. <br /> • (October 2014) Cripple Creek July 2014 Cell Mapping Summary. This memo <br /> summarized the results of a geotechnical surface mapping campaign in both the <br /> WHEX and Cresson mines performed during July 2014. <br /> In the November 2015 CNI Report, Table 1-1 shows various recommended interramp slope <br /> angles for various sectors (1-14) for the areas of excavation. This Table is copied in Attachment <br /> 2 to this Exhibit T. CC&V is following these recommendations. The Map on the following page <br /> from the CNI Report shows the critical cross sections in relation to CR 82. These are listed <br /> below with their respective slope stability safety factors: <br /> Section Min. Factor of Safety Comments <br /> WH-3 1.84 Road is close to edge of <br /> excavation <br /> WH-4 2.28 <br /> GH-4 1.52 Road is closest to edge of <br /> Excavation <br /> GH-6 1.43 <br /> These factors of safety meet the minimum requirements. The cross sections showing the worst <br /> case failure lines are included in Attachment T-2 at the end of Exhibit T. In the DRMS second <br /> adequacy review of Amendment 11, The Division questioned the fact that Cross Sections GH-4 <br /> and GH-6 showed a failure line that included Teller County Road 82. CNI responded that only <br /> the lines of the minimum factor of safety were shown on the cross sections. They provided a <br /> response letter with revised cross sections for GH-4 and GH-6 showing other failure lines with <br /> higher factors of safety. These sections and their response are included in Attachment T-2. <br /> 5 <br />