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• operations. This configuration facilitates final grading to achieve slopes that <br />accommodate revegetation. The approximate final reclamation slopes are shown <br />on Drawing F-1. These are shown as overall average slopes of 2.5 horizontal: l <br />vertical (2.SH:1V). <br />As currently approved, actual slopes may vary from 2.SH:1 V. CC&V's grading <br />operations typically produce a combination of slopes that compliment the existing <br />topography of the area, and which achieve an overall slope of 2.SH:1 V. Steeper <br />slopes between 2.OH:1 V and the angle-of-repose (generally 1.3H:1 V) will be <br />employed in areas where necessary and appropriate to blend in with the adjacent, <br />non-disturbed terrain or serve to better emulate native terrain, and when they meet <br />the following criteria: <br />• Geotechnically stable <br />• Erosionally stable (sediment is not transported past the footprint of the area in <br />quantities greater than surrounding terrain -based on routine observations and <br />sediment control management practices under the standard operating practices <br />of CC&V). <br />• • Can be revegetated, or covered with talus-like rock <br />• Safe for approved post-mining land uses. <br />Surface Water Management <br />The surface water management system for SGOSA remains much the same as that <br />currently approved with additional storm water management included for the <br />SGOSA Extension. The surface water management system is based on a series of <br />diversion and conveyance structures designed to route flows from the 100-year, <br />24-hour precipitation event. Some of these structures direct flows into detention <br />basins prior to sending the water to downgradient streams. The detention basins <br />are designed so that the most downgradient structures contain twice the 10-year, <br />24-hour precipitation event. During operations, interim surface water management <br />will occur using the best management practices described in Section 9.0. <br />Appendix 10, Volume VII contains information on the MLE drainage system <br />including that for the SGOSA Extension. <br />Stability <br />The geotechnical stability analysis of the SGOSA has not changed from the <br />• analysis submitted as part of Amendment No. 8. In summary this analysis used a <br />Cripple Creek & Victor Gold Mining Company <br />Cresson Project Mine Life Extension <br />5-16 <br />