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Seam Slope Stability <br />Page 9 • <br />October 19, 1998 <br />Table 1. Slope stability evaluation along Section 7300. <br />• <br />ASSUMED INPUT: Density - 150 PC F; Residual angle of friction - 25°; Residual cohesion - <br />5 psi; 1976 Aerial photo topo map; a - cut slope stabi lity; b - ground surfa ce stability <br />Slope Weight Slide Normal Thrust Friction Cohesive Dry Max Sat'd <br />Segment (T/ft) Base Force Force Resist Resist F.S. Uplift F.S. <br /> Angle (T/ftl IT/ft) (T/ft) (T/ft) Force <br /> (T/ft) <br />Ia No Overlying Slide Material <br />Ib 23.0 90.3° 17.5 19.8 8.2 29.5 2.21 10.6 1.87 <br />IIa 21.3 39.9° 16.5 13.5 7.7 22.7 2.25 9.8 1.91 <br />IIb 75.6 58.9 37.1 27.2 22.7 1.35 30.5 0.96 <br />IIIa 45.9 35.3° 37.1 26.2 17.3 62.3 3.09 16.9 2.70 <br />IIIb 298.4 293.6 172.9 113.6 62.3 1.02 118.7 0.70 <br />IVa 129.6 32.1° 109.8 68.9 51.2 46.1 1.91 99.9 1.07 <br />IVb 292.8 298.0 155.6 115.7 46.1 1.09 125.8 0.66 <br />Va 273.7 25.6° 299.8 118.3 115.1 69.1 1.51 113.8 1.08 <br />Vb 933.9 391.3 187.5 182.5 64.1 1.32 177.7 0.87 <br />VIa 105.0 12.9° 102.6 22.5 97.8 25.2 3.29 94.8 2.32 <br />VIb 136.5 133.3 29.3 62.2 25.2 2.98 55.7 2.10 <br />VIIa 25.8 -2.7° 25.8 - 1.2 12.0 15.5 N.A. 11.9 N.A. <br />VIIb 38.7 38.7 - 1.8 18.0 15.5 N.A. 16.1 N.A. <br />