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G. DOWNSLOPE BERM WIDTH S'°p`�- co°°`'�
<br /> 1. If landslope is 1% or more, r {. I �
<br /> subtract rock layer width from adsorption width ^ `�'� �"� *�§ `'y
<br /> ,,'7 " .+! Rock 1' �Q �r �� '�
<br /> to obtain minimum downslope berm toe a��d ? . �' ':, + ' " ' '
<br /> , 6"Topsoil
<br /> a�. '1 ft-�_ft = __1_'� feet a�s�il_�
<br /> 2. Calculate Minimum mound Size �,,,�1 v,nd�,
<br /> a. Determine depth of clean sand fill at U�1�w'a�, °�
<br /> upslope edge of rock layer: R°i`o d�' "�",�'"ndw
<br /> Separation 3' -1�_ � _ /.a feet
<br /> b. Add depth of clean sand for separation (2a)
<br /> at upslope edge, depth of rock layer (1 foot) to depth of cover
<br /> (1 foot) to find the mound height at the upslope edge of rock layer;
<br /> 1'� ft +lft + lft = .,�� feet ' �a� -
<br /> c. Enter table with landslope and upslope berm up�j 1�inr�acn � �
<br /> ratio. Select berm multi lier of 3•`�� • � � `1 Poo 4. Q�Q:� x�s�a �
<br /> P d `-o �o.da�4 a�. �Upslo width: `:
<br /> Upslope Width o��e-�a+, ."q-..aa.ao:
<br /> d. Multiply berm multiplier by upslope mound �_ , ,i Q��¢v�; �w 1�Q,�Q���b
<br /> height to find upslope berm width: 3`� � �, �e � ..aP oao�a'��u - o�o ��
<br /> .c ; c�« r�, 1 �r r � �
<br /> 3•�� x 3.'t- _�_feet � � �� � '
<br /> � �, , �� , � , +.
<br /> e. Multiply rock layer width by A � , ,����� -..��� ��
<br /> F ���o�w�aw ►�
<br /> landslope to determine drop in elevation; �,���on�,,r,dw�_
<br /> Io x �I %s 100 = .�I feet � � �, : .r
<br /> � , .
<br /> � .: � :
<br /> , ,,� , ,y..:�r ,..: .
<br /> �.... ... •��� - , • .. .
<br /> f. Add depth of clean sand for slope To��,�, �
<br /> difference (2e)at downslope edge, to
<br /> the mound height at the upslope edge
<br /> of rock layer (2b) to find the downslope height;
<br /> 3,z ft+ .� _ft= 3, S� feet
<br /> g. Enter table with landslope and downslope berm ratio. Select
<br /> berm multiplier of y • � � •
<br /> h. Multiply berm multiplier by downslope mound height to get
<br /> downslope berm width:
<br /> � ,�x 3•S� - � feet BERM SLOPE MULTffI�RC
<br /> i. Compare the values of step G.1�_
<br /> and Step G.2h�_ �d �WNSLOPE UPSLOPE
<br /> Slo berm muUiplkrs tor varfous berm mdtiplias for�acio�u
<br /> Select the greater of the two values as the +�� �+��e�htl� °��°a�"tl�
<br /> downslope berm width; 1 r1 feet S, 4• S•
<br /> j. Total mound width is the sum of o 3.o a.o s.o 6.0 7.0 3.o a.o s.o b.o �.o s.o
<br /> upslope berm (G.ZC�� � 3,09 4,I7 5.26 638 7.53 2.9! 3.85 4.76 5.66 6.54 7.41
<br /> width plus rock layer width (D.2) 2 }.�g a.3s s.sb 6.s2 s.ia Z.ss 3.�o a.sa 5.36 6.►a b.�o
<br /> plus downslope berm width(G.2i)� 3 330 4.54 5.88 7.32 8.86 2.75 3.57 4.35 S.O8 5.79 6.45
<br /> Il_ft + �.�ft + r� ft = �.� feet a s.ai aa6 6.0 �.s9 9.7z z.�s .as a.i� a.sa s.ab e.ob
<br /> k. Total mound length is the sum of upslope S 3.53 s.00 6.67 a.s� �o.r� z.6, 3.33 a.00 a.6z 5.19 s.��
<br /> berm width (G.2d) plus rock layer length(D.3) 6 3.66 s.s6 z�a 9.38 i2.m z.sa s.z� 3.ss a.a� 4.93 s.ai
<br /> plus upslope berm width (G.ZCi�; 7 3.80 5.56 7.69 10.34 13.73 2.48 3.12 3.70 4.23 4.70 5.13
<br /> �ft+ r�ft + �ft = � feet $ 3.95 s.as 8.33 �i.sa is.9i z.ax 3.03 s.s� a.os a.av a.as
<br /> �,, � �� � �� c6 y, 9 4.1 l 6.25 9.09 13.04 18.92 2.36 2.94 3.45 3.90 4.30 4.65
<br /> !0 4.29 6.67 10.00 IS.00 23.33 2.31 ?.86 3.33 3.75 a.12 4.44
<br /> Final Dimensions. �1 4.48 7.14 Il.11 17.63 30.43 2.26 2.78 3.23 3.61 3.95 4.26
<br /> l2 4.69 7.69 1250 21.43 43.75 2.21 270 3.12 3.49 3.80 4.08
<br /> 3� X � f�
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