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G. DOWNSLOPE DIKE WIDTH <br /> • 1. If landslope is 2.9 percent or less,basal width includes both the <br /> . upslope and downslope dike widths, <br /> 2. Calculate minimum mound size based on geometery: <br /> a. Determine depth of clean sand fill at upslope edge of rock <br /> layer: Separation 1 . . feet <br /> b. Multiply rock layer width by landslope to determine drop <br /> in elevation; Slope Difference "°°"° <br /> - x - %-1- 100 = feet <br /> c Add depth of clean sand depth of clean sand for �.f 1�E _k., a<<R� -, <br /> separation at upslope edge (2a) to depth of rock layer to Rock Bed Wi4N <br /> rock depth and the depth of cover to find the total mound fest <br /> n.1oFeW,4,. <br /> height at upslope edge of rock layer; 1"` �- <br /> ) • _). ft + l ft + l ft = '. feet I <br /> d. Enter table on page bottom with landslope and upslope <br /> dike ratio. Select dike multiplier of '-} '' <br /> e. Multiply dike multiplier by upslope mound height <br /> to get upslope dike width: x -I = i feet '-01-':-."-N-- <br /> f. Add the depth of slope difference(2b) to the upslope ` ' ' '�� <br /> height to get the downslope height __ + = feet <br /> g. Enter table on page E-18 with landslope and downslope <br /> dike ratio. Select dike multiplier of <br /> h. Multiply dike multiplier by downslope mound height <br /> to get downslope dike width: x - --= - - • feet <br /> i. Mininmum mound width is the sum of upslope dike <br /> width plus rock layer width plus downslope dike width; <br /> ft + ft +• ft= feet Rock Bed width'[o' u io aew'dth ' <br /> j. Subtract the Minimum width G.i from the Absorption <br /> width F.4 to find the Additional Downslope required for '.Rock Bed S,s1... .:::;:....;;:i...;....:....:.:.:.f.:. <br /> Absorption <br /> ft_- ft= feet upslopeakewidth :iipsfope'DikeWiatllL • <br /> k. Add the Additional Downslope required for Absorption': Dpe` kh'''. . .oW ►� <br /> to the downslope dike width and recalulate the Total <br /> Mound Width which is is the sum of <br /> upslope dike <br /> 1 `width plus rock layer width plus downslope dike width <br /> 1c 47-;-'t.----.51- ;', ft + 1 o ft + )T ft = � ,ie, feet w 1-s-r 1' Total Length l:1 .I <br /> 1. Total mound length is the sum of upslope dike width <br /> plus rock layer length plus upslope dike width; <br /> 13 ft + .S� ft + P-1 ft = q.:_ feet <br /> L)ownslope Upslope <br /> 3:1 4:1 5:1 6:1 7:1 3:1 4:1 5:1 6:1 7:1 8:1 <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 6.38 7.53 2.91 3.85 4.76 5.66 6.54 7.41 <br /> 2 3.19 4.35 5.56 6.82 8.14 2.83 3.70 454 5.36 6.14 6.90 <br /> 3 330 454 5.88 7.32 8.86 2.75 357 4.35 5.08 5.79 6.45 <br /> 4 3.41 4.76 6.25 7.89 9.72 2.68 3.4.5 4.17 4.84 5.46 6.06 <br /> 5 3.53 5.00 6.67 8.57 10.77 2.61 3.33 4.00 4.62 5.19 5.71 <br /> 6 3.66 5.26 7.14 9.38 12.07 2.54 3.23 3.85 4.41 4.93 5.41 <br /> 7 3.80 5.56 7.69 10.34 13.73 2.48 3.12 3.70 4.23 4.70 5.13 <br /> 8 3.95 5.88 8.33 1154 15.91 2.42 3.03 3.57 4.06 4.49 4.88 <br /> 9 4.11 6.25 9.09 13.04 18.92 2.36 2.94 3.45 3.90 4.30 4.65 <br /> 10 4.29 6.67 10.0 15.00 23.33 2.31 2.86 3.33 3.75 4.12 4.44 <br /> 11 4.48 7.14 11.11 17.65 30.43 2.26 2.78 3.23 3.61 3.95 4.26 <br /> 12 . 4.69 7.69 1250 21.43 43.75 2.21 2.70 3.12 3.49 3.80 4.08 <br />