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• <br />L Seam Slope Stability Page 12 October 19, 1998 <br />Table 2. Slope stability evaluation along Section 7950. <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 sta bility; b - ground surfa ce stabil ity <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/ft) (T/ft) (T/f t) (T/ft) Force <br /> (T/ft) <br />Ia No Overlying Sli de Material <br />Ib 31.1 35.3° 25.3 17.9 11.8 29.8 2.09 11.7 2.04 <br />IIa 33.0 35.3° 26.9 19.1 12.6 28.7 2.13 19.5 1.65 <br />IIb 119.8 97.8 69.3 45.6 33.8 1.15 63.1 0.72 <br />IIIa 130.0 33.0° 109.1 70.8 50.9 73.4 1.76 50.9 1.92 <br />IIIb 979.3 397.8 258.3 185.5 73.9 1.00 189.6 0.67 <br />IVa 310.5 28.0° 279.2 147.8 127.8 69.8 1.30 139.8 0.87 <br />IVb 599.0 529.5 278.9 299.6 69.8 1.11 297.1 0.70 <br />Va 515.7 16.0° 995.7 142.2 231.2 78.5 2.18 239.7 1.91 <br />Vb 694.0 667.2 191.3 311.1 78.5 2.09 289.1 1.33 <br />VIa 85.3 28.0° 75.3 -90.0 35.1 23.9 N.A. 38.5 N.A. <br />VIb 50.0 13.5° 98.6 -11.7 22.7 16.6 N.A. 19.9 N.A. <br />