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' Slope: Cover 1'
<br /> G. DOWNSLOPE BERM WIDTH �
<br /> 1. If landslope is 1% or more, , {;,�, x � ;-:�. ,
<br /> subtract rock layer width from adsorption width ,,r�;�;�7�' �i "-��'..�'� 'k���
<br /> to obtain minimum downslope berm toe . c�,s�,a i ,;.� � �,, �<'��� � ,�",;��7,,
<br /> ,�, 6•Topsoil
<br /> ��
<br /> �.�� ft-�ft = -L.�-feet .��� ��>�,
<br /> 2. Calculate Minimum mound Size
<br /> a. Determine depth of clean sand fill at U�''�`"'��' ��
<br /> upslope edge of rock layer: �`� �atj���
<br /> Separation 3' - � �o f� = l,c� 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 = �.v feet '/a� .
<br /> c. Enter table with landslope and upslope berm ' °:vps�w�ac� :
<br /> � �7 �; � �� .,;:.� ,;.: ...: ,.,�..:. .
<br /> ratio. Select berm multiplier of __ • �� �
<br /> :;Upilppe Width'�aQ���Py��Ci Rock Bed ?i P��4q�qa Upslope Width
<br /> d. Multiply berm multiplier by upslope mound ,; �� .,p *
<br /> '. Q p��Fpa� � Width L�.�Pt�Paa�� �_
<br /> q 4 � �V' L.tn �� � 4 �I,R(
<br /> height to find upslope berm width: '�' ," ` , h . , , ��=�=��� ��':�Z`v-:�,�,. a, � �
<br /> ; ,
<br /> L � �S J .��� (Y ��J�I����M .� ��tR 4��(� �� f p�fl( i5 .!
<br /> `' �`�`- x �' -; = u feet
<br /> � y� , L t. 1 .,,
<br /> • S �� !� �,i�( . )`�� �a �!i(q� 1 i,�� ti i , i( i
<br /> S { "
<br /> e. Multiply rock layer width by A t�- �, , t ': �
<br /> . o `, . , `' . Downslope Width� ` ,; .
<br /> landslope to determine drop in elevation; �- - .
<br /> Absorptwn Width ,'� .
<br /> �_x � %+ 100 = , _> feet * �' ti ,� „ „ „
<br /> :. , s � , , .
<br /> . . .. .h ��. ��i
<br /> i. �
<br /> i.; •�:, �,i �I�� iil ,if; r�' ! I.r 1 .. . . .•�. �, ...
<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 /> ;.� ft +�'ft= 3.S feet
<br /> g. Enter table with landslope and downslope berm ratio. Select
<br /> berm multiplier of S�o .
<br /> h. Multiply berm multiplier by downslope mound height to get
<br /> dowrislope berm width:
<br /> �,o v x r:�= J.�_ feet BF.RM SiAPE MUL'I'IPLIERS
<br /> i. Compare the values of step G.1 � '�
<br /> and Step G.2h 'I c_ � p���r�.'r►ous bam�u«Pi,.ar+«u
<br /> Select the greater of the two values as the �� ������ °e��°��'°«
<br /> downslope berm width; � �� feet
<br /> . . S. . . . 4. . . . .
<br /> j. Total motznd width is the sum of o s.o a.o s.o 6.0 �.0 3.o a.o s.o 6.0 �.o s.o
<br /> upslope berm (G.2d) i 3.0� a.i� s.26 6.38 �.ss z.9i s.as a.�6 s.� 6.sa �.ai
<br /> width plus rock layer width (D.2� 2 3.19 4.35 S.Sb 6.82 8.14 2.83 3.70 4.54 536 6.14 6.90
<br /> plus downslope berm width(G.21�; 3 3.30 4.54 5.88 7.32 8.86 2.75 3.57 4.35 S.O8 5.79 6.43
<br /> I D ft + /U ft+ ,�_ft = �;.:�_ feet a 3.ai a.�6 6.zs �.s9 v.�z z.6s 3.as a.i� a.sa s.a6 b.o6
<br /> 1C. Total mound length is the sum of upslope S 3.53 5.00 6.67 SS7 10.77 2.61 3.33 4.00 4.62 5.19 5.71
<br /> berm width (G.2d) plus rock layer length(D.3) 6 3.66 s.z� �.ia 9.�s i�.m z.sa 3.� s.ss a.ai 4.93 s.ai
<br /> plus upslope berrn width (G.ZC��; 7 3.80 S.S6 7.69 10.34 13.73 Z48 3.12 3.70 4.23 4.70 5.13
<br /> �ft + �ft+ /o ft= 4!2 _feet 8 3.9s s.as a.ss ��.s� �s.9! �.ax s.os s.s� a.os a.a9 a.ss
<br /> � �� � a , 1 � � y � 9 4.I l 6.25 9.09 13.04 18.92 2.36 2.44 3.45 3.90 4.30 4.63
<br /> 10 4.29 6.67 10.00 l5.00 23.33 2.31 2.86 3.33 3.75 4.12 4.44
<br /> Final Dimensions. << 4.48 7.14 ll.li 17.63 30.43 Z.26 2.78 3.23 3.61 3.95 4.26
<br /> 12 4.69 7.69 12.50 21.43 43.75 2.21 270 3.12 3.49 3.80 4.08
<br /> ;�� a( �� AJ�
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