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� E-20 <br /> . DOWNSLOPE DIICE WIDTH � <br /> . If landslope is 3%or more,subtract rock layer width from <br /> adsorption width to obtain minimum downslope dike toe <br /> Zt7 ft-�ft=�_ft <br /> . Calculate mound height at edge of rock layer on downslope � <br /> side; <br /> a. Determine depth of dean sand fill at upslope edge of rock �.a.�d.� <br /> layer: Separation I,L feet � �� � � <br /> :,.,aarsm_=,00.>:: <br /> b. Multiply rock layer width by landslope to determine drop � - <br /> in elevation; Slope Difference .�,�,�...at„«=.a�n�x <br /> ,su�es._„»._._ <br /> /O X '! %1100 = � ft �•-_• <br /> c. Add depth of clean sand depth of clean sand for <br /> separation at downslope edge to depth of rock layer to <br /> depth of soil backfill to get mound height at downslope <br /> edge of rock l�a,yer; <br /> fL2 ft + t% ft +_�ft+�_ft =�ft <br /> d. Enter table on page E-18 with landslope and downslope <br /> dike ratio. Select dike multiplier of �l." / <br /> e. Multiply dike multiplier by downslope mound height <br /> to get downslope dike width: � • x ���= Z� ft <br /> g. Compare the values of step G.1 and Step G.2.f. Select the <br /> greater of the two values as the downslope dike width; <br /> �2� feet ���,�w�,�dn <br /> h. Calculate upslope dike width using upslope mound ' <br /> height and upslope dike multiplier from page E-18; <br /> 3.Z �(.7��L = �v � Up�bpe dflu widtA(N <br /> i. Total mound width is the sum of upslope dike width plus °o'"�°�d'k`""°`°;`' <br /> rock layer width plus downslope dike width; <br /> �'�ft+ /O ft+ ZZ ft= D��ft <br /> 3. If landslope is 2.9 percent or less,basal width includes both the <br /> upslope and downslope dike widths. <br /> a. Calculate downslope dike width using steps G.2.a. <br /> through G.2.f; fee <br /> b. Calculate upslope di e 'dth using upslope mound <br /> height and dike multi lier from Page E-18; <br /> x ft= ft <br /> c. Add downslope di e wi th to upslope dike width to rock <br /> layer width <br /> ft+ ft+ ft = ft <br /> E-18 <br /> �� �� <br /> 3:I 1:1 S:t 6:1 7:1 �:1 �:1 S:1 6:1 M �� <br /> 5�lope <br /> 0 3A 1A SA 6.0 7D 3D �D SD 6D 1D tD <br /> 1 1.09 1.17 526 638 753 2.91 3S5 �7f 5.66 65� 7A1 <br /> 2 �.19 �35 556 6ffi 8.1� 2E7 370 4S� S36 il� 6.90 <br /> 3 330 �54 Sl8 732 !26 275 �37 �3S Sm 579 iAS <br /> � 3A1 U6 625 72➢ 9.72 2b6 3AS �-1� {� S'� � <br /> S 75] SAO 6d7 !S7 1077 2d1 33� �m ��2 S19 S�i <br /> 6 366 7.11 93t 12Q7 25� �17 7�i �A1 �.10 SAI <br /> 7--- - ]d0 7.69 1031 13.73 2A8 ..iiT� 7]0 �?3 l70 S1] <br /> ! 7.95 .6S •33 i1S� 15.91 2AI 3A1 7S7 tA5 �A9 �� <br /> 9 {.Il 625 9.fA 1�O�t 1s.92 2�6 2�1 » 3•� � � <br /> 10 !29 6d7 IOD 15.00 Tl3J 231 2a6 331 3.75 �.12 �.� <br /> 11 �A8 �.1� 11.11 1�15 30.11 2.16 2-74 323 �Ei 3.% � <br /> 12 �.69 7b9 1250 21.13 13.75 22t 2.7G 9.12 3.{9 3d0 �D� <br />