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. �. . DOWNSLOPE DIKE WIDTH <br /> 1. If landslope is 2.9 percent or less,basal width includes both the <br /> upslope and downslope dike widths, <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 � , U feet �w� so•� e-. �.S <br /> b. Multiply rock layer width by landslope to determine drop <br /> ,��,... <br /> in elevation; Slope Dif`erence ,�p�, <br /> - x ---0l0+ 100 = .__._ feeE __�.,.�...,� <br /> c. Add depth of clean sand depth of clean sand for ��.��. , ��„� <br /> separation af upslope edge(2a) to depth of rock layer to -- N�,�.Ww�,� <br /> rock depth and the depth of cover to find the total mound -�`" ,�.,,,,,�,,,,�,,, <br /> height at upslope edge of rock layer; --'"" "``-�. <br /> /, �, ft + lft + lft = 3.Dfeet Nw ���-� <br /> d. Enter table on page bottom with landslope and ��pslope <br /> dike iatio. Select dike multiplier of '-f .. <br /> e. Multiply dike multiplier by upslope mound height " <br /> to get �.�pslope dike width: �_x 4 = i�_ fe��t '��� �o�-. , . <br /> f. Add the deptli of slope difference(2b) to the ups?.��pe <br /> height t�get the downslope height � • p+ . �`� ��,.,5. feet so���� � ���Y ��-� <br /> g. Enter table on page E-18 with landslope and downslope <br /> dike ratio. Select dike multiplier of t-I <br /> h. Muldpiy dike multiplier by downslope mot�►nd height <br /> to get doHmslope dike width: 3•5-x � = l4 feet �U• �� - ,._ <br /> . i. Mininrrd�im'mound width is the sum of upslope dik.e <br /> width plus rock layer width plus downslope dike wi�jth; �:; �:;: ::; ;.::,::;;:.::::.?.:;::;::.::;,:: <br /> =ft-�---ft*-------ft= - feet Rak�cd•o �`wditi''`i'��`. :upibpe akr w;dili'���' <br /> j. Subtract the Minimum width G.i from the Absorption "�'''� ''`'�'�'`�''`�' ���:��:::; .� <br /> width F.4 to find the Additional Downslo Itak licd Lcn Kh�� ?;�:;i;;� <br /> pe rec�uired for � <br /> . .. . <br /> ... : <br /> ., <br /> .. .. ... <br /> .. <br /> Absorption . .: .:�:�:::. : �:: ::: :� ::� <br /> ..::. <br /> ..... <br /> .. <br /> __________ Upcbpc�ikc 1N'dth�.'1� . �::;Up�bpc llikc W h,�_ <br /> ^ t �' ��di <br /> . ' -fr- -f� _ . . �ee ,���.�1.W. .,, �:�::;.:;.;..;..r.•,.. <br /> k. Add the Aciditio,►a1 Downslo e re uired for Abso tion�: <br /> p � � 'Ik wrelopc.Dikc'INidih.���.�y:.c <br /> to the downslope dike width and recalulate the Total <br /> •:�:•.;:::;•.:::::;::::;:;::::::: <br /> Mound Width which is is the sum of upslope dike <br /> width plus rocK layer width plus downslope dike width <br /> t L ft +��f t +�y f t = 3� feet �'---r°''��'^F� `�3 -----.--.,� <br /> l. Total mound length is the sum of upslope dike width . <br /> plus rock layer length plus upslope dike width; <br /> !�ft + 5�'" ft +�ft = �_feet <br /> 9:� �:t s•wns c�pe &� '7:� a:� �:t s i�� �t 7:� a:� <br /> T.dope <br /> 0 3A {.0 S.0 60 7.0 3.0 1.0 S.0 6.0 7.0 !A <br /> 1 3.09 1.17 5.26 6.JB 9.5� 2.91 ].e5 {.76 5./6 6.51 9M <br /> • 2 3.19 �.35 5.56 6.82 B.t� 2e3 �.70 �.51 5.36 6.1� 6.90 <br /> 3 330 ISI S.As 7.J2 814� 2.75 J.57 �.35 5.(M 5.79 6.15 i--., <br /> � 3.t1 �J6 6.15 7.89 9.71 2.68 3.15 �.V 1.81 5.�6 6.06 <br /> S 3S1 5.00 ' 6.67 8S7 10.77 2.61 3.3I �.fX1 1.62 5.19 5.71 <br /> 6 �.66 S.M �.1� 9.�6 12.07 2.51 3.27 3.85 �.41 �.93 5.�1 <br /> 7 3.s0 SSb 7.N9 tOJ1 13.�3 2.r11 3.12 3.70 �.Y! �.70 5.1� <br /> ! 3.95 5.88 8.a1 1151 15.91 2.�2 3.47 3.57 l.QS 4.19 ♦.19 <br /> 9 4.11 G25 9.Oi 1).(14 1A.97 2.JI 2.01 3.15 3.af1 I.aO �.65 <br /> 10 t.29 6.67 10.0 iS.QO ?73J 2.JI 2 M4 3.SJ ].75 �.12 1.�/ <br /> 11 IA! �.1• 11.11 17./S �ol� 2.26 2.78' 3.27 �.61 3.v5 12G <br /> /7 �.b0 7.M 1250 Z1.tI ��75 7.21 ?.70 �.17 7.10 �.Iq �,OY <br />