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G. •
<br /> DOWNSLOPE BERM WIDTH slope:- corer 1
<br /> 1. If landslope is 1% or more, Y'.,:t,,>:�;:.,���Y:::t=: •�-.`
<br /> layer width from adsorption width •. ,r�.d�.c4^ita:ktc#n �' ' `
<br /> subtract rock .-,,� •-•;�:.�, ;�.*?�r��•�� x«kr M-+�-���k�:��:. � .,:;: -
<br /> downslope berm toe -1' 'rt ;`; c eanSand)•0 ;, < ,N•lcr•yr ,:
<br /> to obtain minimum 'r- '` :?'7, ,i,; 6.Topsou':y
<br /> a,(,,r-? ft - /Q_ ft = ) 7 feet r,, lSoil
<br /> 2. Calculate Minimum mound Size,
<br /> a. Determine depth of clean sand fill at Upslope Width DO"'s°pe
<br /> upslope edge of rock layer: R°IQ dd' A orpj o Wide,
<br /> •Separation 3' - 2, 04 ft = /, 0 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 /> r
<br /> /,o ft +.1ft + 1ft =. D feet - -- r)s ^
<br /> c. EEnter table with landslope and upslope berm .' 4upalope Wtdth .
<br /> ratio. Select berm multiplier ' 4 =' : . ,• Rock Bed 2'44450.0'': ,'..upslope Width
<br /> d. Multiply multiplier by upslope mound 'Upf pe Widths :_ -
<br /> P Yberm ,;. � Width io �,�+, •. :�. o
<br /> width: 39 :. : .'e° i.es,. r , ;.fi c •`_
<br /> height to find upslope berm ;: s:'•,i h's•� � --c: .... .• L.v. •.,• .._ �.
<br /> .a� = /c? feet .:r.: . -r,` : �:,-t°,.,.{:,., . ,'-',,.'4,;‘).-,,,,-„,-,,,,,,,,,;.-,..,1.,.....:....... .,
<br /> 3. 0 X ,` - j. •. ry.,:'' <.; g:q+,�(
<br /> e. Multiply rock layer width by .� l,'�-1 al:� .,:-.t ', ��":(` ... ` -•
<br /> ' - - '.• Downslope Width f;l -;;''';'!`.r:1“:•''''''
<br /> landslope to determine drop in elevation; �- ;;,::'..� :._ -. Absorption Wlath 12 _ :,.. ._ •-
<br /> / % + 100 = �_feet ', 'c ;,-;, _: •r,'., _. ..�'c4�::,..,:_ .•�.
<br /> �� X 10 . ,%j %•',...:!':f•l.,:l,rr.�;4•t.r:.< :p11'yTf>:�'.•i:.:. ` .��w�. A.z,. .. --
<br /> f. Add depth of clean sand for slope Total t•en _
<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 /> ...I._9__ ft + , (a ft = 3.c- feet
<br /> g. Enter table with landslope and downslope berm ratio. Select
<br /> berm multiplier of ,S, k.6, .
<br /> h. Multiply berm multiplier by downslope mound height to get
<br /> downslope berm width:
<br /> 3- 4, x 5-aL' = Jcj feet BERM SLOPEMULTIPI.>ER.5
<br /> i. Compare the values of step G.1 19
<br /> and Step G.2h 17 Land DOWNSLOPE UPSLOPE
<br /> Slope, berm multipliers for rarlous berm multipliers for rarlour
<br /> Select the greater of the two values as the in I. berm slope t*tia berm slope ratios
<br /> downslope berm width; 19 feet
<br /> j. Total mound width is the sum of 3:1 4:1 5:1 6:1 7:1 3:1 4.1 5:1 6.1 7:1
<br /> 0 3.0 4.0 5.0 6.0 7.0 3.0 4.0 5.0 6.0 7.0
<br /> upslope berm (G.2d) 1 3.09 4.17 5.26 6.38 733 2.91 3.85 4.76 5.66 6.54
<br /> width plus rock layer width (D.2) 2 3.19 4.35 5.56 6.82 8.14 283 3.70 4.54 5.36 6.14 E
<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 E
<br /> )0 ft + /0 ft + I c'l ft = 3•Di feet 4 3.41 4.76 6.25 7.89 9.72 2.68 3.45 4.17 4.84 5.46 E
<br /> k. Total mound length is the sum of upslope 5 3.53 5.00 6.67 8.57 10.77 2.61 3.33 4.00 4.62 5.19 :
<br /> berm width (G.2d) plus rock layer length (D.3) 6. 3.66 5.26' 7.14 9.38 12.07 2.34 .23 3.85 3.85 4.41 4.93 :
<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 :
<br /> 10 ft + 5� ft + 10 ft= feet 8 3.95 5.88 8.33 11.54 15.91 2.42 3.03 3.57 4.05 4.49
<br /> I % -f' SS t )9 _ o)3 9 4.11 6.25 9.09 13.04 18.92 2.36 2.94 3.45 3.90 4.30 •
<br /> 10 4.29 6.67 10.00 15.00 23.33 2.31 2.86 3.33 3.75 4.12 -
<br /> Final Dimensions: 11 4.4E 7.14 11.11 17.65 30,43 2.26 278 3.23 3.61 3.95
<br /> 12 4.69 7.69 12.50 21.43 43.75 2.21 2.70 3.12 3.49 3.80 4
<br /> 3..') X `6y
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