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,•• , �
<br /> . G. DOWNSLOPE DIKE WtDT'�i
<br /> .� l. �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 _l.3 feet �
<br /> b. Muldply rock layer width by landslope to deteimine drop _.,�,
<br /> in elevation;Slopt Di�Ser�nce ""iOwi ` �``�
<br /> -� ------'� t , , t'i�rli:.,:.
<br /> . i .. _�� q �� 4
<br /> c. Add depth of clean send depth oE clear sand for w.,,. � �
<br /> , , .
<br /> �«� -.. �_��r;.t�...
<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 -`" a..,,�.,,,,,`� '�"
<br /> height at upslope edge of rock layer, � --'"' '`�..
<br /> 1.3 ft+ 1 ft*1 ft= 3•� flet
<br /> d. Enter table on page bottom with landslope and upslope
<br /> dike ratio. Select dike mulhplier of U
<br /> e. Multiply dike multiplier by upslope mound height
<br /> to get upslope dike width: 3.3 x � �„�,.3,_feet
<br /> f. Add the deptli of slo�pe differenae(2b)to the u p slo p e � '
<br /> height to get the downslope height --� = feet
<br /> g. Enter table on page E-18 with landslope and downslope
<br /> • dike ratio. Select dike mulHplier of - �-.-- ,
<br /> h. Multiply dike multiplier by downslope mound height
<br /> to get downslope dike width: --.---x-- = feet '
<br /> " � i. Mininmum mound width is the sum of upslope dike
<br /> width plus rock layer width plus downslope dike width; :�.., .;�,s�:�:. �•jtic.�:;c;:s r..:.:•..ft�,=y...
<br /> :i sr ir:?'fr., �+rNb:r:tj�StjM.�rr;�r s.�r:rsV rrtri;r,�,r
<br /> -t'- U bi(ee N►'i�l�i:.. �)'�r
<br /> -_------€t -�--ft�---ft�_f eet R« b�a wid�'�'' :� p� �. 1.�.
<br /> ti ti �► h h ti ti N \ ♦ ti �/Y�
<br /> j. Subtract the Minimu:n width G.i�mm the AbsorpHon •�r;jc;r��'"• �'';: .�c�c..{�T:,�f:.s:.;:.�..`.;u'•:rc;r`•
<br /> :�{�jj I y.Roek Bed Len6th,�� :s+�r�s;
<br /> width F.4 to find the Additional ed for : " :
<br /> AbsorpHon Downslope requir ;sj :;; ,_ ,. .. . . . ..,{;
<br /> ::
<br /> .�. .�
<br /> 'J. �MJ'•lf�J.:SJ: •l�f t:!}tit�f�t.�I.�f:�:.�f.�J.til�• ti�{
<br /> . ,ti_,} SY��11�yYL��lii�tiS.r.Si� {��y��Zi�•
<br /> la' t.� t_ ITilae Widd1 Sj�='+t�'r%trw s�dlQ�dDplDihe1�Vldd1��
<br /> --n- --reC't " " "
<br /> k. Add the AdditionalTM-�- � �•,�{t:�•�r M Y`�a`�M`�`Y{M��`
<br /> W�Yli3�0 u� �S;�ws;.t�. a ..�ti{�.{: �. ala{�. a a �. .. w .. �. �.
<br /> �Y_ .i ifsr �tir�+r�r tir�r• "+r{+r u�r�'+i{+r {sr �i v+.r
<br /> ��•��ti \�h�Y ti ti ti ti ti•N ti����y����
<br /> �ry or Absorption 'tir i'r s�ttt�y{tir{w�{f�: �• �:�• �{ti• {ti' { {ti +r
<br /> pe dike width and recalulate the Total '`''"'`''�`�"'�`
<br /> to the dawnslo �i{Lr''�i'+r`uf+r�'i�{+r{' '+r'y'4� `w"4�`4'W'ti�'4`4�'V'�'t
<br /> �{t�'"•�s"�'~�'';s'�':'�';Iv�'+r{+t~{i�".r;}+`r{v��L{+t{~
<br /> Mound Width which is is tl�e sum of upslope dike `:s;;��;;�{;�,�;�{ ;;,c��,�;;;�,;,{u�,{���,,�,,�
<br /> width plus rock layer wldth plus downslope dike width ' ' ~"
<br /> „�_h+�_ft+,,,��_ft =�feet �'-T°v'�'�-- -�
<br /> 1. Total mound length is the sum of upslape dike width
<br /> plus rock layer length.plus upslope dike width;
<br /> �,�ft+��ft+ �3 ft= �_feet
<br /> �
<br /> �n a� �� � �� r.� �:� �� �� �� r.� M
<br /> � .
<br /> 0 1A l0 S.0 l0 7A �.0 �.0 SA �0 7A �A
<br /> ' 1 1AI �.1! S.2i 6,J! 7S1 2!1 �.� �.76 5.11� i,31 7A1
<br /> 2 �.t� {.� SSL L!2 �.11 2t1 �.70 IS� 5.�6 i,l� i.l0
<br /> - 9 730 �SI S IN 7.32 �.e6 t75 � �.15 S.IM S.TI i.lf
<br /> --. 1 7A1 {.7r l2S 7.l9 �.71 16! 3.6 �.17 l.M 5.16 �.0�
<br /> S �� S.� W 1.51 1Q77 2.61 3�0 �.00 �.62 S.H 5.71
<br /> � a.� s.� �.0 �ae �t.a� :s� �.n �.es �n �.n s�n �
<br /> 7 !JO S� f.M 10� 1�.� LY �.12 �.70 t.?J �.TO S.0
<br /> / �.�5 S.M �J fl31 15.91 1.@ 7.C1 1,S! I.Oi �.M �.11
<br /> � �.i� t�s �.a »aw �ut t.x i.w �.�s �.a �.�o �,�s
<br /> 10 �I �O IOA 15.00 21J! 7.�1 2.IK 7�7 �.7f �.12 IM
<br /> 1f �A� 7.11 tl.lt , 17.�{ 10A1 ?.74 f.711 l.7� 1.A1 �.�5 �,7�
<br /> 12 �M 7M 1!!0 t1A� U.fS L71 7.70 l.tt 7.M 7.s0 IA
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