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�G.' 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:�-v feet .
<br /> b. Multiply rock layer width by landslope to determine drop ���M `
<br /> in elevation; Slope Difference ,�„�,,
<br /> / C� x �� °lo + 100 = 0�Z f e e t __,,„,�,,,,,,,,,
<br /> c. Add depth of clean sand depth of clean sand for w+.o.���� _,,,,,,,p,�
<br /> separation aE upslope edge (2a) to depth of rock layer to �.�� u�
<br /> rock depth and the depth of cover to find the total mound�s� w....�,.,,.�.a
<br /> height at upslope edge of rock layer; �o.� �� �-
<br /> ��D ft + 1 ft + 1 ft = `- �v feet
<br /> d. Enter table on page bottom with landstope and upslope
<br /> dike ratio. Select dike multiplier of 3 , 7d
<br /> e. Multiply dike multiplier by upslape mound height
<br /> to get upslope dike width:3. ��o x �f.o = �feet
<br /> f. Add the depth of slope difference (2b) to the upslope
<br /> height to get the downslope height�+�.d =S/�a- feet . .
<br /> g. Enter table on page E-18 with landslope and downslope
<br /> dike ratio. Select dike multiplier of S; S'�
<br /> h. Multiply dike multiplier by downslope mound height
<br /> to get downslope dike widthS,s X �,a = a y feet
<br /> i. Mininmum'mound width is the sum of upslope dike ��- ��'� '�'/ ��
<br /> width plus rock layer width plus downslape dike width• :;;: ';:��'•����"�'•c:'c :�•:�{::c::c::c.:e..c::c�;.:::::.:,.. '
<br /> / •:�t .��t' �tt t•�t� t•t til tit 1!til.ti�.�J tit ti:�
<br /> 't ; { ' ,�� J.. J.l.J. l..�.f�.'t::;•.
<br /> �ft + �ft + Z�/ ft= '`��feet R« �ewi��i���`'';;��p����� f �:�.�;.;
<br /> • j. Subtract the Minimum width G.i from the Absorption �'�;;:;'�''"�''""` :�'"r�{�{::r�{�{'{�{�{::{`.':;:::
<br /> width F.4 to find the Additional Downslope required for �j: K°` �"'�' r ��
<br /> �• i+�: ::•`:: •
<br /> Absorption ;:i;�:ifr{.is�ir tir i tij� j{;•tir tif tij if;tir;if;ti�;tif;tif tif ir;i�;% �
<br /> _� Upbpc��ikc�dth,,,(�{ , �•.�.•i•.t•.
<br /> +;r;.+r�r tir�r ti.Uplopc ake INidlh/
<br /> So ft ft = �•d feet �r{ { t.
<br /> •ti•t:'•:•tif{r�ft f f t'r2''t'?•''t''t
<br /> �����t'�� '� ':L{.::;SJ ti{�{�•ti:.ti:.�1:����.
<br /> k. Add the Additionai Downslope required for Absorption: ;:•.'•':'� ���:�:��:�� ''`;�:;:�:�•:;t�;:;':z�
<br /> •,::.:��' i3o��'ai� wi�� 's�''�'''���'.�'.�::
<br /> to the downslope dike width and recalulate the Total ;;;;' ';:'.j;: •5::�::,,;,;,;:r;,:,,:t;;tj;5;:::::�::
<br /> Mound Width which is is the sum of upslope dike � ''':':•'•r•'•r```.�:;`f'•:`'`��'':;`:•;
<br /> width lus rock la er width lus downslo e dike width ��j���';' '�;`ti{;j{:`:f{:�`:i:i`''::�::��
<br /> P Y P P
<br /> /S ft + /� ft + 2� ft = 5�d feet �TO�'��"6� '-�{
<br /> . 1. Total mound length is the sum of upslope dike width 9��
<br /> plus rock layer length plus upslope dike width;
<br /> _ �,,, /� /.� ft + �ft + /�ft = �� feet
<br /> .�,���.�,.
<br /> ����' �?S�/- t �/ ,��y 95�
<br /> s�, �,
<br /> �:� 4:i s:� � s:� r.i a:� �:�� � � s:� �:� �:�
<br /> s.�a
<br /> 0 7A �.0 S.o 6.0 7.0 �.0 1.0 S.0 • �.0 �.0 /A
<br /> 1 �D1 J7.. 6.I1 7.5� 2.91 �. �.76 S.Id 6.51 7A1
<br /> �.H 5.56 6.l2 l.11 2!] 3.�0 t54 5.�6 6.0 6.90 r•
<br /> � )]0 T9r 7.32 6.116 7.75 1.35 S.IM 5.79 �.lS
<br /> � �A1 1.76 675 7.l9 9.72 2.6! 3.tS �.17 �.N S.K i.06
<br /> S 3S7 5.00 6.67 l.57 10.77 2.61 3.33 r.0� 1.62 5.19 5.71
<br /> 6 3.66 5.26 7.1t 9.7! 12.07 251 �.b !.!5 �A1 1.t1 bAI �
<br /> > >io sss �.e9 io�� u.» i.�e �.0 �.m �.n �.�o a.ta
<br /> � �.n s.ee �.0 �ts� �s.9i 2.0 �.m a.s� �.a6 �.0 �.11
<br /> v �.�t `�s 9.04 �a.a 1l.92 2.� �.�t �.aS �.�o �ao �.cs
<br /> 10 119 i67 10.0 • IS.00 2333 2.71 2.t6 l.�3 �.75 IJ2 �,11
<br /> It �Aa 7.14 11.11 1�.65 30.1] t.26 1.7t 3.7� 3.q 7.95 �.�6
<br /> 12 1.69 7.69 1250 21A� I].7S 2.21 2.70 �.12 �A1 �.l0 �,a
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