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• �. ' DOWNSLOPE DIKE WIDTH <br /> 1. If landslope is 3% or more, subtract rock layer width from <br /> adsorption width to obtain minimum downslope dike toe for <br /> absorption: <br /> ��.� ft-�D ft = �_ feet <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 , t� feet <br /> b. Multiply rock layer width by landslope to determine drop „�,�,,,� <br /> in elevation; Slope Dif ference ��� <br /> / U x_�% �- 100 = , 3 feet -�-��-� <br /> c. Add depth of clean sand depth of clean sand for ��'`'°"�h�` -����e�• <br /> separation at upslope edge (2a) to depth of rock layer to "°��'"�`°"�-� ' <br /> rock depth and the depth of cover to find the total mound °°"""�'"'�`" <br /> �.., `_ <br /> height at upslope edge of rock layer; <br /> , �, U ft + 1 ft + 1 ft = 3"c� feet <br /> d. Enter table on page bottom with landslope and upslope <br /> dike ratio. Select dike multiplier of 3 .S� <br /> e. Multiply dike multiplier by upslope mound height <br /> to get upslope dike width: _3.0 x 3.5� =J ) feet <br /> f. Add the depth of slope difference (2b) to the upslope <br /> height to get the downslope height <br /> 3,v + . 3 = 3•3 feet <br /> g. Enter table on page bottom with landslope and <br /> downslope dike ratio. <br /> Select dike multiplier of _ 4.S�i <br /> h. Multiply dike multiplier by downslope mound height <br /> to get downslope dike width: 3.3 x�� _� feet <br /> i. Compare the values of step G.1 and Step G.2.h. Select the <br /> greater of the two values as the downslope dike width; <br /> I � feet <br /> j. Total mound width is the sum of upslope dike Rak��a`wid�;':�:�o.`'� '�u�io��wia�;:::i:i;::'�'' <br /> width plus rock layer width plus downslope �'�K«'' "��g�'� �:�::�•:��•:�:•:•:� <br /> :•••••••••���� ��� <br /> dike width; ::: <br /> � �- �� ��'`.'�':•:'::•:'::_�::::�:•::�:::�::.::•:'..:'.;:•:'.;:::::•::.;;:.:.:U"5i�:: ihKe�v;a�,'��::: <br /> I ft + 1 � ft + ft = feet Upslope Dike Width_�_ . •.•: p � �1- <br /> k. Total mound len th is the sum of u slo e <br /> g P P <br /> dike width lus rock la er len th lus �':�.:�: ��Sio��'�ke�'w�a�fi���_'".:;.� <br /> P Y g P <br /> u slo e dike width; <br /> P � , <br /> ! I ft + ��ft + � � ft = � feet ����� �����T�a,.Leng�,.�_�..� . <br /> � � � +- s� + ��- � �- <br /> wns ope ps ope <br /> 3:1 4:1 5:1 &I 7:1 3:1 4:l 5:1 6:1 7:1 8:1 <br /> %slope <br /> 0 3.0 4.0 5.0 6.0 7.0 3.0 4.0 5.0 6.0 7.0 8.0 <br /> I 3.09 4.17 5.26 6.38 �.53 2.91 3.d5 4.76 5.66 6.54 7.41 <br /> 2 3.19 4.35 5.56 6.82 8.14 2.83 3.70 4.54 5.36 6.14 6.90 <br /> 3 330 c:4.54� 5.88,..__--7.32-- 8.86 2.75 - <'�57 y_� 4.ii S.QB 5.79 6.0.5 <br /> 3.41 .76 6.25 7.89 9,T2 2.68 3.4i 4.17 4.Sd 5.46 6.06 <br /> 5 353 5.00 6.67 8.57 10.77 2.61 3.33 4.00 4.62 5.19 5.71 <br /> 6 3.66 5.26 7.14 9.38 12.07 2.54 3.23 3.85 4.4] 4.93 5.41 <br /> 7 3.80 5.56 7.69 ]034 13.73 2.4A 3.12 3.70 4.73 4.70 5.13 <br /> 8 3.95 5.88 8.33 1154 15.91 2.42 3.03 3.57 4.� 4.49 4.88 <br /> 9 4.11 G75 9.09 13.04 18.92 2.36 2.94 3.4i 3.90 4.30 4.65 <br /> 10 429 6.67 10.0 15.00 23.33 2.31 2.86 3.33 3.75 4.12 4.44 <br /> 11 4.48 7.14 71.i1 17.65 30.43 2.26 2.78 3.23 3.61 3.95 426 <br /> 12 4.69 7.69 7250 21.43 43.�5 2.21 2.70 3.12 3.49 3.80 4.08 <br />