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Conditions Malgzed: <br />REAR P1I\E n~. 3 <br />i.46L1; OF SLCi'L Si:~BiLI'li eL::LiSIS .,.._•GLT~ <br />Colluvium - c = 360 psf, ~ = 23° (Peak strength) <br />Bedrock (other Chan massive sandstone) - c = 4000 psf, 0 = 33° (Typical overall triaxica <br />shear strength performance for interbedded siltstone, sandstone, and shale) <br />Seepage condition - 4 ft. thick seepage zone at bedrock/colluvium interface. <br /> <br />Slope r; Coord. <br />(f t.) Y Coord. <br />(ft.) <br />R (f t.) <br />F <br />SFI(°) <br />Section A: <br />Existing Condition: <br />Above portal area - S1 320 6376 167 0.949 30.64 <br /> lJl 0.933 30.25 <br />Below bench area S2 540 6246 239 0.903 31.77 <br /> W2 0.803 34.36 <br />Future condition: <br />20 ft. bench with S3 320 6316 161 0.832 34.07 <br />1:1 backslope W3 0.816 32.74 <br />40 ft. bench with S4 358 6330 196 0.973 37.03 <br />1:1 backslope lJ4 0.826 34.95 <br />40 ft. bench with <br />1:1 backslope- <br />below bench WS 0.895 31.47 <br />Section B: <br />L•xisting condition: <br />Above portal area S1 319 6498 328 2.141 24.32 <br /> S2 326 6488 333 2.150 24.82 <br /> SJ1 2.417 45.01 <br /> W2 4.925 33.47 <br />Below bench area S3 590 6266 252 1.240 24.49 <br /> 413 1.446 23.35 <br />Future condition: <br />Above portal area S4 280 6278 105 2.614 11.41 <br /> SS 342 6490 350 2.089 24.83 <br /> W4 6.001 38.72 <br />Below bench area S6 514 6324 244 1.336 29.83 <br />(reclaimed) S7 590 6266 252 1.240 24.49 <br />Section C: <br />Existing condition: <br />Above portal area S1 390 6328 182 1.178 28.04 <br /> W1 1.132 27.38 <br />Below bench area S2 480 6220 127 1.264 25.04 <br /> SJ2 1.429 26.23 <br /> S3 580 6288 256 1.311 23.61 <br /> W3 1.338 23.28 <br /> lJ4 1.765 17.59 <br />Future conditicn: <br />Above portal area S4 390 6328 182 1.271 26.08 <br /> W5 1.145 27.39 <br />Below bench area SS 450 6220 127 1.210 25.88 <br />(reclaimed) W6 1.321 27.45 <br /> 56 580 6288 256 1.309 23.68 <br /> W7 1.328 23.36 <br /> w8 1.756 17.71 <br /> <br />