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Table 3. Summary of Analvses for Undrained Foundation <br />Table 4. Summary of Analvses for Drained Foundation <br />Shear Stren th <br />Foundation <br />Soil <br />Coal Waste <br />Factor <br />Factor <br />Drained <br />Undrained <br />c <br />Su <br />of <br />of <br />Cross - Section <br />Cross- Section <br />de <br />s <br />s <br />Safety <br />Failure Description <br />Cross - Section A -A' <br />Cross - Section A -A' <br />1650 <br />2.13 <br />Deep through coal waste and partially into foundation <br />NW -SE Max. Section <br />24 <br />0 <br />NW -SE Max. Section <br />30 <br />0 <br />70 -feet high <br />- <br />- <br />1200 <br />1.90 <br />Deep through coal waste and partially into foundation <br />3H:1V slopes <br />53d' <br />53d' <br />1.73 <br />5 -foot deep failure in coal waste <br />Cross - Section A -A' <br />3H:1V slopes <br />1650 <br />1.95 <br />Deep through coal waste and partially into foundation <br />NW -SE Max. Section <br />24 <br />0 <br />Cross - Section A -A' <br />90 -feet high <br />- <br />- <br />1200 <br />1.69 <br />Deep through coal waste and partially into foundation <br />3H:1V slopes <br />0 <br />I <br />53d' <br />1.73 <br />5 -foot deep failure in coal waste <br />Cross - Section B -B' <br />90 -feet high <br />1650 <br />2.72 <br />Deep through coal waste and partially into foundation <br />Transverse Section <br />24 <br />0 <br />3H:1V slopes <br />42 -feet high <br />30 <br />0 <br />1200 <br />2.42 <br />Deep through coal waste and partially into foundation <br />3H:1V slopes <br />1650 <br />53d' <br />1.89 <br />5 -foot deep failure in coal waste <br />Cross - Section B -B' <br />Transverse Section <br />30 <br />1650 <br />2.26 <br />Deep through coal waste and partially into foundation <br />Transverse Section <br />24 <br />0 <br />42 -feet high <br />62 -feet high <br />- <br />1200 <br />1.95 <br />Deep through coal waste and partially into foundation <br />3H:1V slopes <br />I <br />53d' <br />1.75 <br />1 5 -foot deep failure in coal waste <br />Cross - Section C -C' <br />Cross - Section B -B' <br />1650 <br />2.13 <br />Deep through coal waste and partially into foundation <br />NW -SE Section <br />24 <br />0 <br />Transverse Section <br />30 <br />0 <br />68-feel high <br />- <br />1200 <br />1.93 <br />Deep through coal waste and partially into foundation <br />3H:1V slopes <br />53d' <br />53d' <br />1.71 <br />5 -foot deep failure in coal waste <br />Cross - Section C -C' <br />3H:1 V slopes <br />1650 <br />1.92 <br />Deep through coal waste and partially into foundation <br />NW -SE Section <br />24 <br />0 <br />Cross - Section C -C' <br />88 -feet high <br />- <br />1200 <br />1.71 <br />Deep through coal waste and partially into foundation <br />3H:1V slopes <br />0 <br />1200 <br />53d' <br />1.69 <br />5 -foot deep failure in coal waste <br />Table 4. Summary of Analvses for Drained Foundation <br />Bowie No 2 South Gob Pile preliminary stability evaluation <br />Project #05- 126- GEO -08 <br />Page 8 of 10 <br />Shear Strength <br />Foundation Soil <br />Coal Waste <br />Factor <br />Drained <br />Undrained <br />Drained <br />of <br />Cross - Section <br />Description <br />�' (deg) <br />c' s <br />Su s <br />�' (deg) <br />Ic'l-A <br />Cross - Section A -A' <br />1650 <br />- <br />- <br />2.51 <br />Deep failure through coal waste and into foundation <br />NW -SE Max. Section <br />30 <br />0 <br />1200 <br />- <br />- <br />2.16 <br />Deep failure through coal waste and into foundation <br />70 -feet high <br />53d' <br />1.73 <br />5 -foot deep failure through coal waste <br />3H:1V slopes <br />30 <br />0 <br />1.77 <br />5 -foot deep failure through coal waste <br />Cross - Section A -A' <br />1650 <br />- <br />- <br />2.26 <br />Deep failure through coal waste and into foundation <br />NW -SE Max. Section <br />30 <br />0 <br />1200 <br />- <br />1.74 <br />Deep failure through coal waste <br />90 -feet high <br />53d' <br />- <br />1.73 <br />5 -foot deep failure through coal waste <br />3H:1V slopes <br />30 <br />0 <br />1.77 <br />5 -foot deep failure through coal waste <br />Cross - Section B -B' <br />1650 <br />- <br />- <br />3.21 <br />Deep failure through coal waste and into foundation <br />Transverse Section <br />30 <br />0 <br />1200 <br />- <br />- <br />2.82 <br />Deep failure through coal waste and into foundation <br />42 -feet high <br />53d' <br />- <br />1.85 <br />5 -foot deep failure through coal waste <br />3H:1V slopes <br />30 <br />0 <br />1.91 <br />5 -foot deep failure through coal waste <br />Cross - Section B -B' <br />1650 <br />- <br />- <br />2.61 <br />Deep failure through coal waste and into foundation <br />Transverse Section <br />30 <br />0 <br />1200 <br />- <br />2.10 <br />Deep failure through coal waste <br />62 -feet high <br />53d' <br />- <br />1.71 <br />5 -foot deep failure through coal waste <br />3H:1 V slopes <br />30 <br />0 <br />1.75 <br />5 -foot deep failure through coal waste <br />Cross - Section C -C' <br />1650 <br />- <br />2.56 <br />Deep failure through coal waste and into foundation <br />NW -SE Section <br />30 <br />0 <br />1200 <br />- <br />2.27 <br />Deep failure through coal waste and into foundation <br />68 -feet high <br />53d' <br />- <br />1.71 <br />5 -foot deep failure through coal waste <br />3H:1V slopes <br />30 <br />0 <br />1.74 <br />5 -foot deep failure through coal waste <br />Cross - Section C -C' <br />1650 <br />2.26 <br />Deep failure through coal waste and into foundation <br />NW -SE Section <br />30 <br />0 <br />1200 <br />- <br />1.84 <br />Deep failure through coal waste and into foundation <br />88 -feet high <br />53d' <br />- <br />1.68 <br />5 -foot deep failure through coal waste <br />3H:1V slopes <br />30 <br />0 <br />1.74 <br />5 -foot deep failure through coal waste <br />Bowie No 2 South Gob Pile preliminary stability evaluation <br />Project #05- 126- GEO -08 <br />Page 8 of 10 <br />