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• peak ground acceleration of 0.08 g for the pseudo-static analysis. Other input <br />parameters were derived from field examinations, laboratory tests, use of accepted <br />numerical assumptions for certain rock types, and the proposed dimensions of the <br />overburden fill during placement and upon regrading. Factors of safety ("FOS") <br />for the SGOSA were derived for both static and pseudo-static conditions. The <br />stability was analyzed for post-reclamation conditions and the results indicate that <br />the minimum static FOS was equal to or exceeded 1.6 and the minimum pseudo- <br />static FOS exceeded 1.3. For additional details on the stability analysis for the <br />SGOSA please refer to the Amendment No. 8 document, Appendix 6, Volume IV. <br />The SGOSA Extension was analyzed using the same criteria presented above of <br />the SGOSA. The analysis is presented in Appendix 6, Volume IV and indicate <br />that the Extension exhibits static FOS greater than 1.5 and pseudo-static FOS of <br />greater than 1.0. It should be noted that for both the SGOSA and SGOSA <br />Extension the FOS values analyzed and reported are based on the reclaimed <br />slopes of 2.5H:1 V. <br />• 5.7.2 Arequa Gulch Overburden Storage Area ("AGOSA") <br />The AGOSA will be reconfigured as a portion of the base of the Phase 5 VLF. <br />Construction of the Phase 5 VLF will therefore remove the AGOSA as a separate <br />facility and incorporate this facility within the VLF footprint, as discussed in <br />Section 6.3.2. Reclamation of the AGOSA and the associated financial warranty <br />have therefore been removed from the discussions in Sections 11 and 12 of this <br />Project Description and Appendix 11, Volume VII. <br />5.7.3 East Cresson Overburden Storage Area <br />General <br />The ECOSA is a proposed overburden storage area to be constructed in the <br />northeast portion of the mine area (adjacent to the East Cresson Mine area <br />backfill) to accept overburden from the WHEX portion of the East Cresson mine <br />area and the Main Cresson Mine area. The ECOSA will have a footprint of <br />approximately 175 acres, and will hold approximately 66 million tons of <br />overburden. The ECOSA is located within the Grassy Valley surface drainage <br />area and runoff from the ECOSA will flow into Grassy Valley. Ground water <br />infiltration into the ECOSA will predominantly flow into the diatreme. In order to <br />conservatively protect the water quality in Grassy Valley and maintain the <br />• Cripple Creek & Victor Gold Mining Company <br />Cresson Project Mine Life Extension <br />5-17