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C. DC)WNSLOPE BERM WIDTH $°�- �°"�`1�
<br /> 1. If landslope is 1% or more, � �.,.: �
<br /> ,;��:.�.: ,:.:�:: r ;�,::�:�:�. �
<br /> subtract rock layer width from adsorption width � .� '�^`.`^ ,�
<br /> .S,,x��C=.Z�,-�X' Rock 1',. ,j'P:.r'•.i;:PtiK c��.�',`p:'.
<br /> . to obtain aunimum downslope berm toe {c�su►a �:-;t,.:}; �.j��N. ;N;`�;..a.�.�:�;:�
<br /> �- -�`��''A�ii."•,:.r, 6`Topaoil
<br /> ��.� ft-�ft=�Z feet ,� a7o '�
<br /> w.
<br /> 2. Calculate Minimum mound Size
<br /> a. Determine depth of clean sand fill at U�� °°"""1�"nae��
<br /> upslope edge of rock layer. i�'� R� ���,w�a�,
<br /> Separation 3' - �. � ft= /.� feet
<br /> b. Add depth of clean sand for separation(2z)
<br /> at upslope edge, depth of rock layer(1 foot)to depth of cover
<br /> (1 foot) to find the mound height at the upsloge edge of rock layer;
<br /> 1,�ft+'lft+ lft= 3•5� feet - �,�� -
<br /> . ...: ..., . ...
<br /> c. Enter table with landslope and�upslope bernn •�:';;Yup:ia�w�a�, : .�:.. ::: :���::::` �
<br /> ratio. Select berm multiplier of �.t� . '� <..':.:�:�:'::;;:;````� . .�'
<br /> Upslope wdw�::?a�x:�o�;�'• Rocfc Bed }a�ox4la�=: �Upslope widc� .-:
<br /> d. Multiply berm multiplier by upslope mow-�d _.�� ,.. �� ��� wcar� �a�-�� ,.�_ :;. �,-
<br /> p�� 40 • ��'!�,' . � s+:. 4= �<:.,. . : .:.. .:.• :.
<br /> hei t to find upslope berm width: � - .�ti::�`;:";�:" °•��:�� �' ;�a��'���'a�` ;��,�r��;„.��.. � ,::��:.:- �i
<br /> O" E ' '� x ��M
<br /> �_x.�.��=J3_feet t ` = 1 fi a,=f �,,��,���ns ,�,+*,w,4 + ,s,,�,�",�fi,� ,,`t x
<br /> � L c. M .Lc �v+ +irA.��lr''���'�i C v. �y���y
<br /> t t .�,i r ,i ti a i��;K.f1'rh�'� �� r������i�t .
<br /> e. Multiply rock layer width by ' "
<br /> K ,,, �s ,.aX ..�
<br /> ` � 1 �� h},a {11( �'.l� `�... ./� -!�� .
<br /> landslo e to determine dro in elevation; F ` °o"R'�0��"'d�'���'�;��tY,� ^
<br /> p P a�sorpnen w�dr�L� .-_:';.0
<br /> l0 x 3 %+ 100= � 3 feet .t�s�=-�.�. �t -� , �; ��r�,;� s���, �-���'�' '
<br /> ..��.,7 il �. .T:.�:.t� ��h)-:u�Y~�,.�..,_ -..��'.h�:rr ...• ' .
<br /> f. Add depth of clean sand for slope � Tow�,�,Z�,
<br /> difference (2e)at downslope edge,to
<br /> the mound height at the upslope edge
<br /> of rock layer (2b) to find the downslope heig.�t;
<br /> ��ft+�ft= ��feet ��� ���''"`�'
<br /> g. Enter table with landslope and downslope berm ratio. Select 3.�3'` 3,'f � ! �
<br /> berm multiplier of y.S4 �•� '` S.�z� = aa'
<br /> h. Multiply berm multiplier by downslope s,ound height to get
<br /> downslope berm width:
<br /> 4.5� x,,��,=J,'1 f eet BERM SLOPE MUL'TBI.�RS
<br /> i. Compare the values of step G.1�_
<br /> and Step G.2h�.2_ '�'� ���r�.�� ��pi.�
<br /> Select the greater of the two values as the �% �����a� ���
<br /> downslope berm width; I��� ��.'� feet
<br /> j. Total mound width is the sum of � � � � � � '� � � '
<br /> 0 3.0 4.0 S.0 6.0 7.0 3.0 4.0 S.0 6.0 7.0 8.0
<br /> upslope berm (G.ZCi� ����o�+ ��3 1 3.09 4.17 3.26 6.38 733 2.91 3.85 4.76 3.66 6.54 7.41
<br /> width plus rock layer width(D.2� Z 3.19 4.35 S.S6 6.82 8.14 2.83 3.70 4.34 5.36 6.14 6.90
<br /> plus downslope berm width(G.2i); 3 3.�o a,sa s.sa �a2 s.sa z.�s �a.3s s.os s.�9 b.as
<br /> 13 �♦ �0 {�♦ )'� {'f= �� o feet��T 4 3.41 4.76 6.25 7.89 9.72 2.68 3.43 4.t7 4.84 5.46 6.06
<br /> k. Total mound length is the sum of upslope s s.ss s.00 �.� s.s� io.r �.ai 3.33 a.00 a.�z s.i9 s.�i
<br /> berm width(G.2d) plus rock layer length(D3) 6 3.� s.� �.ia 93a �Zm zsa 3.z� s.as a.ai 4.93 s.a�
<br /> plus upslope berm width (G.ZC��; 7 3.80 5.56 7.69 l0.34 13.73 2.48 3.12 3.70 4.23 4.'f0 5.13
<br /> �,3� ft+�,�ft+ � � , ft= �feet $ 3.95 s.ss a.ss i�.sa is.s� x.az s.o3 s.s� a.os a.a9 a.ss
<br /> �' � � 3•� a�� 7(i 9 4.l I 6.25 9.09 13.04 18.92 2.36 2.44 3.43 3.90 430 4,65
<br /> �„ 10 4.29 6.67 IQ00 15.00 2333 2.31 L86 3.33 3.75 4.12 4.44
<br /> Final Dimensions. ll 4.48 7.14 ll.11 17.65 30.43 2.26 2.'78 3.23 3.6t 3.95 4.26
<br /> � 12 4.69 7.69 1230 21.43 43.15 2.21 270 3.12 3.49 3.80 4.08
<br /> y i X �4S
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