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• - t 72-- -:--.- <br /> , <br /> 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 <br /> D.0.0 ft- 13 ft = 10 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 &.0 feet <br /> b. Multiply rock layer width by landslope , Ifoot Cover <br /> to determine drop in elevation; ' t foot Ro -ed <br /> Slope Difference SeperatIon ..2.2 fest <br /> 10 x c ÷ 100 - . feet Slope Difference _• et <br /> Upslope width <br /> c. Add depth of clean sand for separation (2a) 12) feet <br /> Rock Bed W1dtn <br /> at upslope edge,depth of rock layer(1 foot) to depth of feet Downslope Wtdtn <br /> cover (1 foot) to find the mound height at the upslope edge ` feet <br /> of rock layer; <br /> D.0 ft + Ift+ lft= L feet <br /> d. Enter table with landslope and upslope dike ratio. <br /> Select dike multiplier of 3.3 3 . <br /> e. Multiply dike multiplier by upslope mound height <br /> to find upslope dike width: t-) x 3.3z = 13 feet • <br /> f. Add depth of clean sand for slope difference (2b) at <br /> downslope edge, to the mound height at the upslope edge <br /> of rock layer(2c) to find the downslope height; <br /> 11.o ft+ ,S ft= 1-1.S feet <br /> D g. Enter table with landslope and downslope dike ratio. <br /> Select dike multiplier of 5.0 . <br /> h. Multiply dike multiplier by downslope mound height <br /> to get downslope dike width: 1-1.‘- x S.o = feet <br /> i. Compare the values of step G.1 and Step G.2h Select the <br /> greater of the two values as the downslope dike width; _ 1_ <br /> feet .UGslpOs Wldin <br /> j. Total mound width is the sum of l) test <br /> upslope dike G.2e width plus rock - ac;sea Width <br /> layer width (D.2) plus = up.19.pr wietn uostopiwidtn <br /> test �..�test <br /> downslopedike width(G.2i);.21 <br /> 0 <br /> 1z ft+ /o ft + aft = 72..i.re feet <br /> �i ? <br /> k. T Total mondlenis the sum of :l � 5 ; ; i: : ::::? :<-DoWnslo s Width <br /> a <br /> Leet <br /> upslope dike width (G.2e) plus rock layer <br /> length (D.3)plus upslope dike width (G.2e); <br /> r ft + c ft + )3 ft = c 1 feet <br /> a-\ ss' t a /o I - °) - <br /> .- <br /> Total Length <br /> Downslope Ups-lope <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 40 5.0 6.0 7.0 3.0 4.0 5.0 6.0 7.0 8.0 <br /> I 3.09 4.17 5.26 6.38 733 2.91 3.85 4.76 5.66 654 7.41 <br /> 2 3.19 4.35 556 6.82 8.14 2.83 3.70 454 5.36 6.14 6.90 <br /> 3 3.30 434 5.88 7.32 8.86 2.75 3.57 435 5.08 5.79 6.45 <br /> J 4 3.41 476 6.25 7.89 9.72 2.68 3.45 4.17 4.84 5.46 6.06 <br /> 5 353 5.co 6.67 8.57 1027 2.61 3.33 4.00 4.62 5.19 571 <br /> 6 346 526 7.14 938 12.07 2.54 323 3.85 4.41 4.93 5.41 <br /> 7 390 556 7.69 1034 1373 2.48 3.12 3.70 423 4.70 5.13 <br /> 8 3.95 598 833 1134 15.91 2.42 3.03 357 4.05 4.49 4.88 <br /> 9 4.11 6.25 9.09 13.04 18.92 236 2.94 3.45 3.90 4.30 4.65 <br /> 10 419 647 10.0 15.00 2333 231 2.86 333 3.75 4.12 4.44 <br /> 11 4.48 7.14 11.11 17.65 30.43 2.26 2.78 323 3.61 3.95 4.26 <br /> 12 4.69 749 12.50 21.43 4375 221 273 3.12 3.49 3.80 4.08 <br />