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G. DOWNSLOPE DIKE WIDTH 1. If landslope is 3% or more,subtract rock layer width from adsorption width to obtain minimum downslope dike toe for absorption: D,6-9 ft- /0 ft = / !) feet 2. Calculate minimum mound size based on geometery: a. Determine depth of clean sand fill at upslope edge of rock layer: Separation 1 .3 feet b. Multiply rock layer width by landslope to determine drop in elevation; Slope Difference /0)'- '70 .S°1-1'1....14 L _ , 1 t) x Cf % - 100 = ."i feet j --rti- c. Add depth of clean sand depth of clean sand for U �- separation at upslope edge (2a) to depth of rock layer to Rock StY•11.15 rock depth and the depth of cover to find the total mound °° � �� height at upslope edge of rock layer; ) .3 ft + 1 ft + l ft = 3.3 feet d. Enter table on page bottom with landslope and upslope dike ratio. Select dike multiplier of D .moi y . e. Multiply dike multiplier by upslope mound height to get upslope dike width: 3.3 x 27;4 = 10 feet f. Add the depth of slope difference (2b) to the upslope . height to get the downslope height 3( + . = 14.-2- feet g. Enter table on page bottom with landslope and downslope dike ratio. Select dike multiplier of q .r)L . h. Multiply dike multiplier by downslope mound height to get downslope dike width: 4.N x y.'L6 = . o feet v S -- Li °70 i. Compare the values of step G.1 and Step G.2.h. Select the . greater of the two values as the downslope dike width; ao feet j. Total mound width is the sum of upslope dike Rock-Bed V ldth'•i '''' Uplope okew a 10: width plus rock layer width plus downslope : ': : dike width; '`-` ' 1 U ft + /0 ft+ 'C) ft = y 0 feet Upslope Dike Wldth-fit :;upslope Dike Width 11 k. Total mound length is the sum of upslope dike width plus rock layer length plus u slo e dike width, 1 • I 0 ft + ss ft + /0 ft = r) feet F. a C.I -}- S S --l- Q 0 t cis r f Toeal Length 7 " r 1 9 S Downslope Upslope 3:1 4:1 5:1 6:1 7:1 3:1 4:1 5:1 6:1 7:1 8:1 %slope 0 3.0 4.0 5.0 6.0 7.0 3.0 4.0 5.0 6.0 7.0 8.0 1 3.09 4.17 5.26 6.38 753 2.91 3.85 4.76 5.66 6.54 7.41 2 3.19 4.35 536 6.82 8.14 2.83 3.70 4.54 536 6.14 6.90 3 3.30 434 5.88 7.32 8.86 2.75 337 4.35 5.08 5.79 6.45 4 3 41� 6.25 7.89 9.72 2.68 3.45 4.17 4.84 5.46 6.06 5 353 5.00 6.67 8.57 10.77 2.61 3.33 4.00 4.62 5.19 5.71 6 3.66 5.26 7.14 9.38 12.07 2.54 3.23 3.85 4.41 4.93 5.41 7 3.80 536 7.69 10.34 13.73 2.48 3.12 3.70 4.23 4.70 5.13 8 3.95 5.88 833 1134 15.91 2.42 }03 337 4.06 4.49 4.88 9 4.11 625 9.09 13.04 _18.92___ 2.36 3.45 3.90 4.30 4.65 . 10 4.29 6.67 10.0 15.00 2333 231 2.86 3.33 3.75 4.12 4.44 11 4.48 7.14 11.11 17.65 30.43 2.26 2.78 323 3.61 3.95 4.26 12 4.69 7.69 1250 21.43 43.75 2.21 2.70 3.12 3.49 3.80 4.08