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G. DOWNSLOPE BERM WIDTH slope: Cover l'
<br /> •1. Iflandsiope is 1% or more, ;
<br /> :/ :i:. ;
<br /> subtract rock layer width from adsorption width t '`' '' ' '"*". .'4 f1�f
<br /> ,... x'7x'� Rodd' li; ,o- :
<br /> downslope berm toe •�^J"`i'n•. Cleart5and7�,if f:i+/r•'.,•:;'4.'/;r:,A • 4�� 5(,' /`.• 6•I ..•_ ?y
<br /> to obtain minimum ' opsou
<br /> . 1...4 ft- )__ft = V) feet Natural Soil 6 o �. ..• :s;2":
<br /> ly1r.6 r Y�
<br /> 2. Calculate Minimum mound Size up,lowndth �,
<br /> a. Determine depth of clean sand fill at
<br /> upslope edge of rock layer. ' ,"b'0Ri n Width
<br /> Separation 3' - i=ft= -2-g) 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= 4,O feet - -
<br /> `•`' ..•;Upslope Width•
<br /> c. Enter table with landslope and upslope berm . h. :;.:.:.•: t a ., ..••:: :
<br /> multiplier of �: :.,.: „,
<br /> ratio. Select berm 3,o� ::: .;._•'.. ..,r,{.;;�,.-r;�;,, :t:'� �.:,i;.:..::,ia.. � wed
<br /> ';�U sl a Width:l::•� ���-�RiO�Bed ?tea � �f0�Upalope th
<br /> d. Multiply berm multiplier by upslope mound :;. r' �°� 1, '► meth _J�_ ��'+�' M
<br /> 'jF .ti:.4:.�'�,�• • '� 1.et �� �4 n•..rt.:.J.. ,.i:..:
<br /> height to find upslope berm width: �D ,. . ,,,... .:•°.. °,e,t*;sk. f '' ai°`.. ^ `'�?'`.�. ` . .-
<br /> -:,: Ivo, ::,.
<br /> fir R.� 1••4,p, 1 ,f F. ij' TI": M J:• /';r'1 1; 1, Y•, I.�.;;,,.: •if':
<br /> = feet "•. ..;,'1 u;, w , 'y.t i/({',4' M y,�N . TM1 �1„'}' �'-.�!v. ..
<br /> �j 03 ,mit ,Ti::..i41,,e,!••i�.�N N" 7" •.fit ,fy,a7I,f. .IL' f. ?,, S_:'u.r..
<br /> � x J. ) 3 )r,1 ,•' 1•,'�:,�Yj(J�xi4.l��r'n":y:!'�"n:44/�y�f.Hi', M h U�nl�,�' Ir�.�a:..,
<br /> width by4:01:4.1
<br /> .,3,,,:0.4..:•'r 9.K•�"4i.' t K,.{ .;$.:. ,":. .•
<br /> e. Multiply rock layer " •�.. 1' :Y•::Y,,,',:'1' .4$1:� .FIS;;,,,;-.4,041r:171:•.!....� :. •:�:' .:.• :
<br /> o ;:,: .'��".�. :;'.., ,�.:... ;!; Dow:tslope Width 2�,.. .!..:;;r1.7::-.• : .
<br /> landslope to determine drop in elevation; �- % e.1% jl%: . Absorslo a wndth 1�_ , .�':':'.•
<br /> + - , feet -• ,"0, -•r. -411C:7!1•;t 0.4.4 • ` ..,.,,;..4,...:
<br /> /_ o x /0 100 - � ; 'y f•.- -,f::::. ..
<br /> Q I,;•!. �',y',.,f'�p,!y•'`:•s'i�f•.i.�'� Ti'�"C+l�N4•:� ' �,• \�..:r:�•.:..
<br /> . � r.:, . "C a, +, <,'ly r'•'h/t ny.i,lw,,�l x J~34i h1 @ ��..:........,;.1:...,{,., 4. �:
<br /> f. Add depth of clean sand for slope *Meal 1.e:,.c1L1._�r_
<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 /> 9.0 ft + • ft= 4, feet
<br /> g. Enter table with landslope and downslope berm ratio. Select
<br /> berm multiplier of 5`
<br /> h. Multiply berm multiplier by downslope mound height to get
<br /> downslope berm width:
<br /> ,5.q`I; x 4 a =_..feet BERM SLOPE MULTIPLIERS
<br /> i. Compare the values of step G.1_12._
<br /> and Step G.2h Laud DOWNSLOPE UPSLOPE
<br /> Slope, berm multipliers for various berm multipliers for various
<br /> Select the greater of the two values as the iberm slope rs cs berm slope rade:
<br /> downslope berm width; feet
<br /> 3:1 4:1 5:1 6:1 7:1 3:1 4:1 1:1 6:1 7:1 8
<br /> j. Total mound width is the sum of
<br /> 0 3.0 4.0 5.0 6.0 7.0 3.0 4.0 5.0 6.0 7.0 8
<br /> upslope berm (G.2d) 1 3.09 4.17 5.26 6.38 7.53 2.91 3.85 4.76 5.66 6.54 7.
<br /> width plus rock layer width(D.2) 2 3.19 4.35 5.56 6.82 8.14 2.83 3.70 4.54 5.36 6.14 6.
<br /> plus downslope berm width(G.2i); 3 3.30 4.54 5.88 7.32 8.86 2.75 3.57 4.35 5.08 5.79 6.
<br /> ON ft+ )U ft+a V ft= S o feet 4 3.41 4.76 6.2s 7.89 9.72 2.68 3.45 4.17 4.84 5.46 6.
<br /> k. Total mound length is the sum of upslope s 3.s3 5.00 6.67 8.57 10.77 2.61 3.33 4.00 4.62 5.19 5
<br /> berm width (G.2d) plus rock layer length(D.3) 6. 3.66 5.26 7.14 9.38 12.07 2.54 3.23 3.85 4.41 4.93 5
<br /> plus upslope berm width(G.2d); 7 3.80 5.56 7.69 10.34 13.73 2.48 3.12 3.70 4.23 4.70 5
<br /> Id\ ft + /00 ft+ i D, ft= , feet 8 3.98 388., 8.33 11.54 15.91 2.42 (,._3.03 1 3.57 4.05 4,49 4
<br /> D.' Y /0 0 4- a `e I S{0 9 4.11 6.25 9.09 13.04 18.92 2.36 2.94 3.45 3.90 4.30 4
<br /> 10 4.29 6.67 10.00 15.00 23.33 2.31 2.86 3.33 3.75 4.12 4
<br /> Final Dimensions: 11 4.48 7.14 11.11 17.65 30.43 2.26 2.78 3.23 3.61 3.95 4
<br /> 12 4.69 7.69 12.50 21.43 43.75 2.21 2.70 3.12 3.49 3.80 4
<br /> 5o X i Lib - r) - -,<v.-c-»..1\.,
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