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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 /> ,A..9ft - `D ft = /6 7 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 / feet . <br /> b. Multiply rock layer width by landslope to determine drop „oo,C„N • <br /> in elevation; Slope Difference .:::..•::.::.•::•:.:::• tfoot Rod <br /> /9 x .3' % + 100 = .. feet <br /> c. Add depth of clean sand depth of clean sand for Width" -"ma* -het slape aa... <br /> separation at upslope edge (2a) to depth of rock layer to "` "hot " <br /> rock depth and the depth of cover to find the total mound """'lo``Wd'" <br /> height at upslope edge of rock layer; <br /> / ft + 1 ft + l ft = .3 feet <br /> • <br /> d. Enter table on page bottom with landslope and upslope <br /> dike ratio. Select dike multiplier of 3.33 <br /> e. Multiply dike multiplier by upslope mound height <br /> to get upslope dike width: 3 33' x 3 = 7, 5 feet <br /> f. Add the depth of slope difference (2b) to the upslope <br /> height to get the downslope height <br /> 3 + ,S = . j feet <br /> g. Enter table on page bottom with landslope and <br /> downslope dike ratio. <br /> Select dike multiplier of S rC5-15, • <br /> h. Multiply dike multiplier by downslope mound height • <br /> to get downslope dike width: 8.6' x S = /'Z5-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 /> 72e 5_ feet <br /> j. Total mound width is the sum of upslope dike Rock ifed•widar/r3'''' '�u ioPe DikeWidth''/0 .•••: :;. <br /> width plus rock layer width plus downslope <br /> dike width; c liLe <br /> . th lioe• ng .+ -_ <br /> /0 ft (p ft + /? ft = V.S eet Upslope Dike Wldth./Q • • •• p pe Dike width /Q <br /> k. Total mound length is the sum of upslope <br /> Downslope'bike'.Wldt{t- .;`':'' <br /> dike width plus rock layer length plus <br /> upslope dike width; <br /> /0 ft + ,67) ft + /. ' ft = ?G') feet Total Length .I <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 5.56 6.82 8.14 2.83 3.70 454 5.36 6.14 6.90 <br /> 3 3.30 454 5.88 7.32 8.86 2.75 337 4.35 5.08 5.79 6.45 <br /> 4 3.41 4.76 6.25 7.89 9.72 2.68 3.43 4.17 4.84 5.46 6.06 <br /> 333 _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 3.80 556 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 3.03 357 4.06 4.49 t,•r 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 /> 10 429 667 10.0 15.00 23.33 2.31 2.86 333 3.75 4.12• <br /> • • 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 />