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<br />- - - Ta61e~3 -IIW Mine Ptt <br />~ <br />. <br />~= Backfill StgbllityAnalysis- ~ <br /> <br />Slope <br />Grade <br />Angle <br />Vertical Unit <br /> <br />' <br />F.O.S. <br />Pit We <br />i <br />ght PhI Cohesion F.O.S. (Wet) <br /> (H:V) (%) (degrees) Rise (ft) (Unsaturated) <br /> c <br />I(W Actual 23.1 13.0 475 106.5 36.5 115 2.34 Piez. surface 100'-250' 2.34 <br />IIW 2.5:1 40.0 21.8 200 106.5 36.5 115 1.32 Piez. Surface 40' 2,04 <br />IIW 2.5:1 40.0 21.8 100 106.5 36.5 115 1.34 Piez. Surface 18' 2.17 <br />IIW 2.5:1 40.0 21.8 50 106.5 36.5 115 1.31 Piez. Surface 5' 2.38 <br />IIW Actual 23.1 13.0 475 94.2 36.5 115 2.36 - <br />IIW Actual 23.1 13.0 475 115.6 36.5 115 2.33 - <br />Note: The percent grade and angle shown for the actual slope is the average over the section. <br />• <br />• <br />