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3. DOWNSLOPE DIKE WID '1-I <br /> 1. If landslope is 3% or more, subtract rock layer width from <br /> adsorption width to obtain Minimum downslope dike toe <br /> c90 ft - lea ft = / ft <br /> 2. Calculate mound height at edge of rock layer on downslope <br /> side; <br /> a. Determine depth of clan sand fill at upslope edge of rock • TQIYRR•TorRon..r .•. <br /> layer: ,§eparation l „feet <br /> b. Multiply rock layer wi ith by landslope to determine drop °°r"R" ION-- <br /> in elevation; Slope Difference OI•I DIflJIZFNCI.SLOPE I res.e ROCK HID <br /> I • •IFJRRRNCI. UN s_ _.__ <br /> /0 x ' 1'3 (ro+ 100 = /.3 ft SLOPR.-% <br /> c. Add depth of clean sand depth of clean sand for <br /> • separation at downslope edge to depth of rock layer to <br /> depth of soil backfill to get mound height at downslope <br /> edge of rock layer; <br /> S ft + / ft + ft+ r J ft = 73•? ft ` <br /> d. Enter table on page E- 8 with landslope and downslope �� <br /> dike ratio. Select dike Iinultiplier of 41,76 � <br /> e. Multiply dike multiplier by downslope mound height <br /> to get downslope dike width: i Ifo x 3,1' = /,:r. ft <br /> g. Compare the values of Step G.1 and Step G.2.f. Select the <br /> greater of the two values as the downslope dike width; <br /> I 'Q feet Rock layer width(d2) <br /> h. Calculate upslope dike width using upslope mound <br /> height and upslope dile multiplier from page E-18; <br /> 73 <br /> .57 x 3,5 = ft <br /> _ Upslopedike width(h) <br /> i. Total mound width is the sum of upslope dike width plus Downslope dike wldt <br /> rock layer width plus downslope dike wi th; <br /> ft + (° ft }+- 01 ft= ya . ft <br /> 3. If landslope is 2.9 percent or less,basal width includes both the <br /> upslope and downslope dike widths. <br /> a. Calculate downslope dike width using steps G.2.a. <br /> through G.2.f; felet <br /> b. Calculate upslope dike Width using upslope mound <br /> height and dike multiplier from Page E-18; <br /> xft = ft <br /> c. Add downslope dike width to upslope dike width to rock <br /> layer width <br /> ft+ ft 4- ft = ft <br /> E-18 <br /> Downslope Upslope <br /> 3:1 4:1 5:1 6:1 7:1 3:1 4:1 5:1 6:1 7:1 81 <br /> %slope <br /> 0 3.0 4.0 5.0 6.0 7.0 3.0 4.0 5.0 6.0 7.0 8.0 <br /> 1 3.09 4.17 5.26 638 7.53 2.91 3.85 4.76 5.66 634 7.41 <br /> 2 3.19 4.3.5 536 6.82 8.14 2.83 3.70 434 5.36 6.14 6.90 ' <br /> 3 330 454 5.88 732 8.86 2.75 357 435 5.110 5.79 6.45 <br /> 4 3.41 4.76 6.25 7.89 9.72 2.68 3.45 4.17 4.84 5.46 6.06 <br /> 5 353 5.00 6.67 857 10.77 2.61 3.33 4.00 4.62 5.19 5.71 <br /> 6 3.66 5.26 7.14 938 12.07 234 3.23 3.85 4.41 4.93 5.41 <br /> 7 3.80 556 7.69 1034 13.73 2.48 3.12 3.70 4.23 4.70 5.13 <br /> 8 3.95 5.88 833 11134 15.91 2.42 3.03 357 4.05 4.49 4.88 <br /> 9 4.11 6.25 9.09 13.04 18.92 2.36 2.94 3.45 3.90 430 4.65 <br /> IO 429 6.67 10.0 15.00 2337 T31 2.86 3.33 3.75 4.12 4.44 <br /> II 4.48 7.14 11.11 17.65 30.43 2.26 2.78 323 3.61 3.95 436 <br /> 12 4.69 7.69 1250 21.43 43.75 221 2.70 3.12 3.49 3.80 4.08 <br />