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i � �. G. � DOWNSLOPE DIKE WIDT�I 1. If landslope is 2.9 percent or less, basal width inclu es both the upslope and downslope dike widths, 2. Calculate minimum mound size based on geometer : a. Determine depth of clean sand fill at upslope edge of rock layer: Separation . � feet b. Multiply rock layer width by landslope to de ermine drop in elevation; Slope Difference "°°"`°"" 1 foa Roh d J x �� % � 100 = � feet �y;��w„�� c. Add depth of clean sand depth of clean sand for ��,�d�, ' �� , �t ��a��R� separation at upslope edge (2a) to depth of rock layer to R�,&,W,d,„ rock depth and the depth of cover to find the to al mound -`'`-�`� Dawn�lap�Wfd�A height at upslope edge of rock layer; ��`" �_ � ft + 1 ft + 1 ft = 3,� feet � d. Enter table on page bottom with landslope a d upslope dike ratio. Select dike multiplier of �� , � e. Multiply dike multiplier by upslope mound eight to get upslope dike width: ,-�, ;% x ? ,� = U feet f. Add the depth of slope difference (2b) to the pslope height to get the downslope height ?..s(+ , 2 = �I,�% feet g. Enter table on page E-18 with landslope and downslope dike ratio. Select dike multiplier of �� ,"7 r. h. Multiply dike multiplier by downslope mo nd height to get downslope dike width: �I • `�I x �I 3� = feet i. Mininmum mound width is the sum of upsl pe dike width plus rock layer width plus downslope ike width; �ft + l O ft + � '7 ft = �l � f et R«ks�a`w�dih'��' �:�u�io�ai�'w�a�hJ:�::::.:_�;�:.:�:. j. Subtract the Minimum width G.i�from the A sorption '�''`�'� '`�''�''''•�'''�''`�'''•�'' :�:�:::•::.:;•::: width F.4 to find the Additional Downslope re uired for :� R«k°�a�"g+h'� .,�':�::� Absorption <:: . ..,::.:::..:.:...:...:.::::::::.�;:�: u�b��;i�w�a�;�� :.u�io��ai�w�dii,�- ...... .:....:... ;::.;:.:::;::::::•::•:'.:. a�,.�l Et - �1 1 ft = -i 4.3 feet ..... ..:..:..::::.::..:..:..:..:..:..:..:..:..:. k. Add the Additional Downslo e re uireci for Absort�tion�: '^ . P q C :� Downalope•.Dike��Width�• 1 / .: to the downslope dike width and recalul�te th Total � Mound Width which is is the sum of u slo e ike P P width plus rock layer width plus downslope ike width �'�'��'''�'''�''`�''`�'�'�'� ''�'�`�'�`�'�`�'''�� `�'�`�'�`�'�`�'�`��'� I � ft + � D ft + )' ft = � eet �-TotalLength J`�71� . --.� 1. Total mound length is the sum of upslope d ke widtll plus rock layer length plus upslope dike widt ; )�) ft + _�_ft + 1L ft = �i � et I � -fi- C�� -�� I � ) i��Z wns ope ps opc 3:1 A:t 5:1 6:1 7:1 3:1 4:1 5:1 6:1 7:1 8:l 9L 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 3A9 �.17_ 5.26 6.38 7.53 2.91 3.85 4.76 5.66 6.54 7.A1 ._1.___ ___ J-19 .. .�4.35� _ 5.56 6.62 8.74 __ _ 2.83 .. __..�3.70� 4S4 5.36 6.14 6.90 3 330 lS4 S.RS 732 � 8.86 2.75 357 �.35 5.08 5.79 b.d5 1 3.41 4.76 6.25 7.89 9.72 2.68 3.d5 4.17 I.Bd S.db 6.06 5 353 5.00 6.67 8.57 70.77 2.61 333 4.00 4.62 5.19 SJl 6 3.66 5.26 7.14 9.38 12.Q7 2.54 3.73 3.85 6.41 4.93 5.41 7 3.80 556 7.69 10.34 1�.73 2.48 3.12 3.70 4.13 C.70 S.1J 8 3.95 5.88 8.33 i154 15.91 2.42 3.Q) 3S7 1.06 1.49 �.88 9 {.11 625 9.09 13.(M 18.92 2. 2.94 3.15 3.90 4.30 1.65 ]0 !�9 G67 10.0 IS.00 2J33 2.J1 2.86 333 3.75 4.12 1.44 11 4.48 7.1d 11.11 17.65 30.43 2.2 2.78 3.73 3.61 3.95 416 12 4.69 7.69 1250 21.4J 4).75 2.21 2.70 3.12 3.49 3.80 4.08 I �