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surrounding ground since the entire backfill portion would fail into the lake, and the failure plane <br />would not reach higher than the crest of the slope. <br />A summary of the safety factors determined in the three slope stabilty scenarios can be seen <br />below. <br />Note: GP angle of repose = 37 °; SM angle of repose = 34° <br />In all three scenarios the safety factor of the slope is well over the required 1.3. <br />Tomichi Pit, December 2013 GS -2 <br />Dry Density <br />Cohesion <br />Lowest <br />Safety <br />Factor <br />GP <br />SM <br />GP <br />SM <br />Scenario 1 <br />110 pcf <br />108 pcf <br />0 <br />0.21 <br />1.97 <br />Scenario 2 <br />110 pcf <br />108 pcf <br />0 <br />0 <br />1.98 <br />Scenario 3 <br />110 pcf <br />86 pcf <br />0 <br />0 <br />1.77 <br />Note: GP angle of repose = 37 °; SM angle of repose = 34° <br />In all three scenarios the safety factor of the slope is well over the required 1.3. <br />Tomichi Pit, December 2013 GS -2 <br />