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160 <br />140 <br />120 <br />100 <br />H (Ft) 80 <br />60 <br />40 <br />20 <br />Haul Road Slope Stability <br />90% Probability of <br />Exceedence = 806 psf <br />0 —� <br />500 1,000 <br />1,500 2,000 2,500 <br />Cohesion (psf) <br />ility of <br />= 3981 psf <br />3,000 3,500 4,000 4,500 <br />—f—H, 1.5:1, FS=1.5 nd=1 <br />—)-H, 1.5:1, FS=1.5, nd=2 <br />H, 0.5:1, FS=1.5, nd=1 <br />Note: <br />1:5:1= 34° Slope <br />0.5:1= 63° Slope <br />Design based on D.W. <br />Taylor & W. Fellenius <br />Figure 4-1 <br />Haul Road Cut Slope <br />Evaluation Chart <br />Mountain Coal Company <br />RPEE Permit <br />