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BERM WIDTH Slope 1 cover r
<br /> G. DOWNSLOPE r_;;>:
<br /> landslope is 1% or more, ,�'E ' , . .:.
<br /> adsorption width , ",, ' `"" "''+1`' ,,,,, '<
<br /> subtract rock layer width from _ < � �<�•:t ��'R«kr � � r, � -
<br /> s- can Sand -•••K„, :'14......0';',•?` -,' ""'': �
<br /> to obtain minimum downslope berm toe , tzliiI-• o ;'';` "6-Topsod }�
<br /> _ feet Natural Soil H82O :e<X
<br /> 2. Calculate Minimum mound Size Upslope Width Width
<br /> a. Determine depth of clean sand fill at H ..»o, °1
<br /> upslope edge of rock layer: RocWSdth "bsarptionwidth
<br /> l r'l
<br /> Separation 3' - i• o 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 /> 2 ,._. ft +' lft + lft = LLc) feet �'
<br /> c. Enter table with landslope and upslope berm ' : "•i•:';7 Up-slope winch. .
<br /> ratio. Select berm multiplier of 3•Lt.' � �.'..•� ° °'-0Q
<br /> U sl a Width Qer• 4',0; khBcd o A.'tig¢ie..•)0'Upl ape Width
<br /> d. Multiply berm multiplier by upslope mound, ,. p..,°?: ,, • ' ay. ;o net i4a= ka. -;,
<br /> height to find upslope berm width: •:•r• "' Tr
<br /> y.0 x 3 t� = I 9 feet , ,; irA,, c.~ J7 4,: . r 7i t•,.i ,�w t�f . ,, k, .
<br /> L 1 n `
<br /> e. Multiply rock layer width •, ..:...„...•,..-....;,:i:.4..:::...„&..,.,.f4, ,
<br /> F° ; � t , Downslo Width -Z I��� ��."�?�s+ SSi,u�
<br /> landslope to determine drop in elevation; , t Absorption Width 1 ..
<br /> f L) %+ 100 = . y feet „�.,,..
<br /> f. Add depth of clean sand for slope Total Lam, I) _
<br /> difference (2e)at downslope edge, to , 35
<br /> the mound height at the upslope edge A� -c-'>
<br /> 7)4
<br /> of rock layer (2b) to find the downslope height;
<br /> H.0 ft + , t--f ft = LH feet
<br /> g. Enter table with landslope and downslope berm ratio. Select
<br /> berm multiplier of L) , '7 to
<br /> h. Multiply berm multiplier by downslope mound height to get
<br /> downslope berm width:
<br /> y ._ L, x 1- ,1--1 = a 1 feet_ BERM SLOPE 1KULTl3't.>EFts
<br /> i. Compare the values of step G.1, I "7
<br /> Land DOWNSLOPE UPSLOPE
<br /> and Step G.2h 2, 1 Slope, berm multipliers for miom term multipliers for various
<br /> Select the greater of the two values as the , in% term slope ratios term slope ration
<br /> downslope berm width; D. ) feet a3
<br /> P x, -�»-,,b 3:1 4:1 5:1 6:1 7:1 3:1 4:1 5:1 6:1 7:1
<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
<br /> upslope berm (G.2d) 1 3.09 4.17 5.26 638 7.53 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 2.83 3.70 4.54 5.36 6.14 <
<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 c
<br /> 1L-1 ft + /0 ft + al ft = LI feet 4 3.41 47.-----7_6, .), 6.25 7.89 9.72 2.68 `3,45 ')4.17 4.84 5.46
<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 2.54 3.23 3.85 4.4: 4.93
<br /> plus upslope berm width (G.2d); q.v.o 7 3.80 5.56 7.69 10.34 13.73 2.48 3.12 3.70 4.23 4.70
<br /> ,_a ft + (ac.. ft + , 19 ft = 9 ( feet l z) 8 3.95 5.88 8.33 11.54 15.91 2.42 3.03 3.57 4.05 4.49
<br /> 3 1 -4- to cc J- a) /)0 / ;• 4 , \ 9 4.11 6.25 9.09 13.04 18.92 2.36 2.94 3.45 3.90 4.30
<br /> o2-g+-.-U) 10 4.29 6.67 10.00 15.00 2333 2.31 2.86 3.33 3.75 4.12
<br /> Final Diunensions. ra--.r-1o,3 ' ll 4.4E 7.14 11.11 17.65 30.43 2.26 27E 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
<br /> •
<br /> '��w X >r �i-- --\
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