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G. DOWNSLOPE BERM WIDTH �°p"3�•' co"a 1�
<br /> 1. If landslope is 1% or more, ��� �x�•x::�;�,::��,,,:,�. `+'.'�;
<br /> �,-� .d�""$aw,x :a�''`,
<br /> � �v ;�,.;.,..
<br /> subtract rock layer width from adsorption width ,.,��.�.d::;j�;' " �,�... ;;r;Y�:�:�-.
<br /> ... < t -� x«kr ��� � ;�; a�:.,.
<br /> „ Qean Sand� � ,;�� , > > ;;t << <� �.r;i `
<br /> to obtain minimum downslope berm toe r �� � � , 6•T��il
<br /> 2V, ft - ► � ft = _L.�, feet =�sou c�`�o
<br /> 2. Calculate Minimum mound Size � ��
<br /> a. Determine depth of clean sand fill at U�'°a 'a�,
<br /> upslope edge of rock layer: ��d� Absorpti�Width
<br /> Separation 3' -�� _ �� 3 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 /> /• �ft+'lft + lft = 3 •3 feet ' � -
<br /> c. Enter table with landslope and upslope berm - �.�"'�.�`:� ';-.t-:;.vpai�Hr►ac��; . . �
<br /> > ...r.. .. : : ::: .. ,.: .
<br /> ratio. Select berm multiplier of t :..��..;.... +_��".'.-��.`� �;�,;,r;�:. , .:.,.. .. ,: ��.,.::.,.:.�. . ..: ..
<br /> 7.i�� � i�YS "�:"4`,ij.:�� . .. . ...� . .
<br /> �,bU slo '.:Widch;�:'vo .��:POY, ' Rock Bed �a�a7►.Q1��� 'Upslo vYidth'�:'ti.
<br /> d. Multiply berm multiplier by upslope mound �,.P� ;,.. � r��.� wia�n 1,,.T y��r�y.�¢�. : :,:.,.
<br /> ��� 1*� � 4
<br /> height to find upslope berm width: �`�� L `' ��' } �"' � 4 L��� {
<br /> 3'1 ;R 5':`,s.�hr� , ;y t1� {� v �17'a� � l ,�11�a+S
<br /> a•.,•7.:y, •;^� ?� 7�! 't\
<br /> L�S .al:.}'l:C:')��r:��..'3.,��1���q.d�b.(jin'J��.�I' ,d'�!!,.��J`n1�!,i\�.v�i�.'((•„i'�sa;�o.1:�`�'c'd,f(:`���(,Yn}�.�1 H �! ���
<br /> �.,s�,x 3,3 -.�feet � : � � << ti .N�i, � .�,) ) x�<�r<� ` , 7�� � ,
<br /> Ir ''f-.. ( rfl'0..h7i i'k ti!/I�ti� 'r� �( f�.(4�.(�I�YI ��]`��IY�(+1� �fi �..
<br /> e. Multiply rock layer width by � � r ,� ���-s ri'3 t����- ��r�;�7��.��}�,,,'�]]]4 ��1 , , µ` , � '
<br /> �,y . 4 . , .. �)KZJ'K TY-__'����ldYl�,� � .�k;�
<br /> landslope to determine drop in elevation; � , V�"r�� I )
<br /> . � . � A�Spt�tlORW1duL1J � .
<br /> /� X � �% 1�0 � .�1 Y L� q, t.y�i .y i �( iµ�iij..y. �i i� t r � f' } '
<br /> + feet '
<br /> , � . .•.a , �h� ' �
<br /> . �
<br /> �; . . ..:�� ..:.�..:� :..� �.)�,il✓.... �,�t�r..,t1�1���. 1,;ti .. . ;.. ..,,;� �. �:
<br /> f. Add depth of clean sand for slope Toc�t,�,�2
<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 /> 3.3 ft + �_�ft = 3-� feet
<br /> g. Enter table with landslope and downslope berm ratio. Select
<br /> berm multiplier of 5.a� .
<br /> h. Multiply berm mulriplier by downslope mound height to get
<br /> downslope berm width:
<br /> S•�.c� x�:2= �1- feet BF.RM SLOPE MUL'I'IPLIERS
<br /> i. Compare the values of step G.1 1 �
<br /> and Step G.Zh�-L_. Laad ���r�,�arl«u o«m mnl��ues�r.�ariO�s
<br /> Select the greater of the two values as the �'� ���� °��`°�°"`�°`
<br /> downslope berm width; �� feet
<br /> j. Total mound width is the sum of o 3.o a.o s.o 6.0 �.0 3.o a.o s.o 6.0 �.o s.o
<br /> upslope berm (G.ZC�� � ;,p9 4.17 5.26 6.38 7.53 2.91 3.85 4.76 5.66 6.54 7.41
<br /> width plus rock layer width (D.2� 2 3.19 4.35 3.56 6.82 8.14 283 3.70 4.54 5.36 6.14 6.90
<br /> plus downslope berm width(G.2i); 3 3.�o a.sa s.sa �.sz s.as z.�s s.s� a.3s s.oa s.�9 b.as
<br /> �_ft+�ft+ �_ft = �,�.feet a 3.ai a.�6 6.zs �.a9 9.�z z.aa 3.as a.t� a.sa s.ab e.o6
<br /> �C. Total mound length is the sum of upslope S 3.5� 3.00 6.67 SSl 10.77 2.61 3.33 4,00 4.62 S.I9 5.7t
<br /> berm width (G.2d) plus rock layer length (D.3) 6 3.66 �s�a�� �.�a 9.38 i�.m z.sg, �s.z� � 3.ss a.a► 4.93 s.ai
<br /> plus upslope berm width (G.ZC��; � �•� 5.56 7.69 1034 13.73 2.48 3.12 3.70 4.23 4.�0 5.11
<br /> `�� ft + �s� ft + � ft= .�L feet $ 3.93 s.sa 8.�3 i�.sa is.9� x.a2 �.os s.s� a.os a.a9 a,ss
<br /> a� _� ,�� }_ �� . � � 7 9 4.11 6.25 9.09 13.04 18.92 2.36 2.P4 3.45 3.90 a.30 4.65
<br /> ��
<br /> 10 4.29 6.67 10.00 IS.00 23.3) 2.3! 2.86 3.33 3.75 4.12 4.44
<br /> Fina1 Dimensions. �� 4.48 7.14 Il.11 17.65 30.43 2.26 2.78 3.23 3.61 3.95 4.26
<br /> , 12 4.69 7.69 1250 21.43 43.75 2.21 270 3.12 3.49 3.80 4.08
<br /> 3� X /v `1 ����:-
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