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G:•'� DOWNSLOPE DIKE WIDTH <br /> 1. If landslope is 3% or more,subtract rock layer width from <br /> adsorption width to obtain minimum downslope dike toe for <br /> absorption: <br /> 'Dior) ft- 10 ft = 17 feet <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. 0 feet <br /> b. Multiply rock layer width by landslope to determine drop ,,.,0,;,.., <br /> in elevation; Slope Difference i ff .:4:.::;:.::;-,:..;:.:...::.::.::i ,,...... <br /> f D x %y 100 = , V feet <br /> c Add depth of clean sand depth of clean sand for :_5Zint Slope ow... <br /> separation at upslope edge (2a) to depth of rock layer to �i�"` <br /> rock depth and the depth of cover to find the total mound ',.:`d"-..„.. _ <br /> height at upslope edge of rock layer; <br /> 1. 0 ft + lft + 1 ft = 3.O feet <br /> d. Enter table on page bottom with landslope and upslope <br /> dike ratio. Select dike multiplier of 3.o 3 . <br /> e. Multiply dike multiplier by upslope mound height <br /> to get upslope dike width: 3.o x 3.0-; = feet <br /> f. Add the depth of slope difference(2b) to the upslope <br /> height to get the downslope height <br /> 3.0 + . = -feet <br /> g. Enter table on page bottom with landslope and <br /> downslope dike ratio. ( <br /> Select dike multiplier of S. . <br /> h. Multiply dike multiplier by downslope mound height <br /> to get downslope dike width:3• ce x 5,cie = as feet <br /> i. Compare the values of step G.1 and Step G.2.h. Select the . <br /> greater of the two values as the downslope dike width; <br /> feet <br /> &.:::•;:•.,;:•:•;:,.::::;:-;:•:-.::-....:-....: <br /> w d�;`- 'tai''' ?hope of w dth''cj'' <br /> j. Total mound width is the sum of upslope dike R. <br /> width plus rock layer width plus downslope "'''`' `::"'"::::':: :.: ::' _��'-� ' <br /> dike width; .�"'-••xn1''C�c�...'`.'`'''. ;'``" <br /> 5 ft + /0 ft + as ft= t} ) feet UpslopeDikewidth a ..UpslopeEli;Width_ -:___ <br /> k Total mound e length is the sum of upslope <br /> g P P <br /> dike width <br /> lus rock layer length plus °ow" °pe i�'Ice i%Jid't6 'i <br /> P Y g <br /> upslope dike width; <br /> ft + SS ft + ft= /D3 feet F. Total Length 7. ►) <br /> D.. -r S,'"' -r a a' q9 o►oi <br /> Downslope 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 6.38 753 2.91 3.85 4.76 5.66 6.54 7.41 <br /> 2 3.19 4.35 556 6.82 8.14 2.83 3.70 4.54 5.36 6.14 6.90 <br /> 3 3.30 434 5.88 7.32 8.86 2.75 3.57 4.35 5.08 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 3.53 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 9.38 12.07 2.54 3.23 3.85 4.41 4.93 5.41 <br /> 7 3.80 5.56 7.69 1034 13.73 2.48 3.12 3.70 4.23 4.70 5.13 <br /> _fl-- 3.95 ( ) 833 ___ 1154 15.91 2.42 33.. 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 /> 10 4.29 6.67 10.0 15.00 2333 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 />