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l ' I l( )\\IN'.,! ( )J'F BFJ,;M VVJ I l 111 <br />lf landslope 1s 1% or more, <br />sublrac1 rock layer vvidth from <1ds(1rpt1on vv1dth <br />to obtain minimum downslope berm lo(' <br />_L()_ ft &__ ft = / 0 feet <br />2 Calculate Minimum mound Size <br />a. Determine depth of clean sand fill at <br />upslope edge of rock layer <br />Separation 3' -2 ft _ _.___ 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 />_L ft + 1ft + 1ft = _3__ feet <br />c. Enter table with landslope and upslope berm - <br />ratio. Select berm multiplier of '.3 • Z..3 <br />Hock Width <br />Upslope Width 7 <br />d. Multiply berm multiplier by upslope mound <br />height to find upslope berm width: <br />Up,lop(' Width Upslope Width <br />3,.'2.3x 3 =~feet <br />e. Multiply rock layer width by <br />landslope to ..detennine drop in elevation; <br />JO x _0_% + 100 =~feet <br />f. Add depth of clean sand for slope <br />difference (2e)at downslope edge, to <br />Total Length. __ _ <br />the mound height at the upslope edge <br />of rock layer (2b) to find the downslope height; <br />6,b ft+ 3 ft=~feet <br />g. Enter table with landsl=e and downslope berm ratio. Select <br />berm multiplier of S. "f:b_ . <br />h. Multiply berm multiplier by downslope mound height to get <br />downslo:ee berm width: <br />~ x 5 :l6 = 1i_ feet BERM SLOPE MULTIPLIERS <br />i. Compare the values of step G. l / 0 <br />and Step G.2h __,_I°(.,___ <br />Select the greater of the two values as the <br />downslope berm width; \q feet <br />j. Total mound width is the sum of <br />upslope berm (G.2d) <br />width plus rock layer width (D.2) <br />I?}u~ downslope berm width(G.~_p,½-, <br />:::el ft+ _[Q_ ft+ -1!}_ ft= .::::d:.Lfeet <br />k. Total mound length is the sum of upslope <br />Land <br />Slope <br />in% <br />0 <br />DOWNSLOPE <br />berm muJtiplitts for various <br />berm slope ratios <br />'.:J 4:1 5:J 6:1 7:1 <br />4.0 5.0 6.0 7.0 <br />4.17 5.26 6.38 7.53 <br />3.i9 4.35 5.56 6.82 8.14 <br />330 4.54 5.88 7.32 8.86 <br />3.41 4.76 6.25 7.89 9.72 <br />500 6.67 8.57 10.77 <br />berm width (G.2d) plus rock layer length (03) ,, , ,,,. \ J<, , 14 9.35 12 07 <br />plus upslope berm width. (C.2d)i} / <br />L:f_ __ ft+ _6.3_ ft + _ _}j_ it = '"'71~--feet <br />l, ~(l <br />1 !i <br />7 69 JI) 34 13 71 <br />I j .)4 I~ I}! <br />,·i..o.: IS'!. <br />I~ ()(I :i.Li3 <br />Final Dimensions: I I C a, 7 J-1 i I 11 J"/(;' 10 4 3 <br />I. ! <•'' I:, ',fl ~I I . :, .1 ,-, •. <br />3:l <br />3.0 <br />2.91 <br />2.8~ <br />2.75 <br />2.68 <br />2.61 <br />: ).'.l <br />?.A;. <br />! 4} <br />~--~~ <br />.' :i i <br />' _l( I <br />! <br />UPSLOPE <br />bttm multipliers for various <br />berm slope ratios <br />~.Q <br />3 ',7 <br />3.4) <br />"5:i <br />).0 <br />4.17 <br />4 00 <br />1 8'. <br />6:1 <br />6.0 <br />5.66 <br />'i 36 <br />5.08 <br />4.84 <br />4.62 <br />-1 23 <br />; •Jil <br />. ; ~ 'I (' ) <br />7:1 <br />7.0 <br />6.54 <br />6.14 <br />5.79 <br />5.46 <br />5.19 <br />J.9?- <br />4 70 <br />~ .'lt.J <br />.1 \ii <br />.1 L) <br />\ 'I' <br />-: }If! <br />8:1 <br />8.0 <br />7.4 I <br />6.90 <br />6.45 <br />6 06 <br />5.71 <br />5 ~ I <br />5 '' .., <br />4 88 <br />-1 (}~) <br />~ 44 <br />.j -:'<) <br />~ ()f <br /><f:).-J X Of --··--cL(j:L __ ,__ __LL ___ ---------I ---------~--------~--------~