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Stability for SerFer <br />Stability analysis was completed for the design of the SerFer pit. The following design parameters were <br />used: <br />• Pit depth of 12 feet <br />• Mining occurred at .5:1 <br />• Minimum top width of reclaimed liner 12 feet <br />• Reclaimed reservoir slopes, minimum of 3:1 <br />The analysis showed that assuming a minimum top width of 12 feet for the liner, the pit is stable under <br />both full conditions and in rapid drawdown conditions. The lowest factor of safety for failure under full <br />conditions is 2.8. The minimum acceptable factor of safety for full conditions is 1.5. The minimum <br />Factor of Safety for a rapid drawdown scenario of the SerFer Pit is 1.8. The accepted minimum factor of <br />safety for a rapid drawdown scenario is 1.2. The output files of both analyses are attached. <br />