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G. D0\VNSLOPE DIKE WIDTH <br />1. If land.slope is 3% or more, subtract rock layer vvidth from J adsorption v .. idth to obtain minimum dmvnslope dike toe <br />-;;:. J.1 ft -_LQ_ ft= J? feet <br />2. Calculate Minimum mound size based on geometery: <br />:>I-&,'-)o-::... lo <br />~!¾:,~ <br />~ J <br />a. Determine depth of clean sand fill at upslope edge of rock <br />layer: Separ1;tion J, o feet <br />b. Multiply rock layer width by landslope <br />to determir.e drop in elevation; <br />Slope Difference 1.0~'"' <br />_}_L X _!::}__% + 100 = _0j__ feet <br />c. Add depth of clean sand for separation (2a) <br />at upslope edge, depth of rock layer (1 foot) to depth of <br />cover (1 foot) to find the mound height at the upslope edge <br />of rock layer; <br />_l_Q_ ft+ 1ft + 1ft = 3 ,i) feet <br />d. Enter table mth landslope and upslope dike ratio. <br />Select dike multiplier of -3,':i < . w~--r- <br />e. Multiply dike multiplier by upslope mound height <br />to find upslope dike width: ~ x 3. '-I.<= .lJ)_ feet iJ <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 />3 ,c.'.l ft + .?....:L_ ft = ~feet <br />g. Enter table mth landslope and downslope dike ratio. <br />Select dike multiplier of Lt. '7 (,, <br />h. Multiply dike multiplier by downslope mound height <br />to get downslope dike width: ~ x .:L2.k_ = ~ feet <br />i. Compare the values of step G. l and Step G.2h Select the <br />greater of the two values as the downslope dike width; <br />Rock: Bed Wldtll <br />_jQ_ feet <br />'3 ,0 i--'3,. :2 3 -=-JO f;Jl--S, <br />3, c,., x. S.::i_ t..-=-/"7 <br />10 feet~-r ~===== <br />j. Total mound width is the sum of Jc;'~-<- <br />upslope dike (G.2e) width plus rock · _, <br />"-t-Jo+ l""l~ 07 <br />1 layer width (D.2) plus <br />~~ downslope dike width(G.2i); w"%~ <br />_J <br />_l.12_ ft+ _j__Q__ ft+ -1..J_ ft= ~ feet ::. w k. Total mound length is the sum of <br />upslope dike width (G.2e) plus rock layer <br />length (D.3) plus upslope dike width (G.2e); <br />-12_ ft + ~ ft + _j.Q_ ft = ~ feet <br />10 -t-C.."c -t J?-J Joy <br />Uownslope <br />3:1 (:1 5:1 6:1 7:1 3:1 <br />,. slope <br />0 3.0 U) 5.0 6.0 7.0 3.0 <br />I 3.09 4..17 5.26 6.38 7.53 2.91 <br />2 3.19 4..35 5.56 6.62 8.14 2.83 <br />6.86 2.i3 <br />4:1 <br />4.0 <br />3.85 <br />3.70 <br />3S1 3 3.30 4.54 5.88 7.32 <br />4 3.41 ~ 6.25 7.89 9.:n ____ -~68 1-P 5 3.53 _____ <br />6.f3 8S1 10.n 2.6] ~· 7.J( 9,.38______.....12.0L ~ <br />7 3./:0 ,.56 7.flJ 10.34 13.73 2.4.!I 3.12 <br />8 3.95 5.88 8.33 11.54 15.9] 2.42 3.03 <br />9 4.11 6.25 9.09 13.04 18.92 2.36 2.94 <br />10 4.29 u;J 10.0 15.00 23.33 2..31 2.86 <br />11 ua 7.14 11.11 17.bS 30.43 2.26 2.78 <br />12 4/.i 7.flJ 1250 21.43 43.75 2.21 2.70 <br />Totel Lengtn <br />Upslope <br />5:1 6:1 7:1 8:1 <br />5.0 6.0 7.0 8.0 <br />4.76 5.66 6.54 7.41 <br />4.54 5.36 6.14 6.90 <br />4.35 5.lll 5.79 us <br />4.17 4.84 5.46 6.06 <br />4.00 4.62 5.19 5.71 <br />3.85 Ul 4.93 5.41 <br />3.70 4.23 4.70 5.13 <br />3S1 ,.cs 4.49 4.88 <br />3.45 3.90 4.30 4.65 <br />3.33 3.75 4.12 4.44 <br />3.23 3.61 3.95 4.26 <br />3.12 3.49 3.80 4.lll