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G. h(')W NS1.(1P1. BERM W I I Til 1 cO.•e/ I <br /> 1. If landslope: is 1% or more, 5?:-O'' •""'*`':' ':".4.1;:;44',.. <br /> :`: ''1"'^;.:•r• . <br /> subtract rock layer width from adsorption w c- :?°=' `� s <br /> to obtain minimum downslope berm toe ,. : 4 t Rock 1' io'v° _Fg'', <br /> Ta'- Clean Sand ;'�;�^;',t�t(t: .. <br /> 6-Topsoil r <br /> _____ ft - IP_ ft = /1 feet Natural Soil__- <br /> 2. Calculate Minimum mound Size "11111 <br /> a. Determine depth of clean sand fill at lllxlope Width Downslope Width <br /> upslope edge of rock layer: Rock Width Absorption Width <br /> Separation 3' - Z_ 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 /> 1 ft + lft + lft = 36 feet <br /> c. Enter table with landslope and upslope berm up io Width <br /> ratio. Select berm multiplier of 3•45- . <br /> ov 4.eoo - � oeoe � o.� <br /> d_ Multiply berm multiplier byupslope mound UP pe Width ,0000; .17,6'-Rck Bed ,oso4>+b�:'t Upslope Width <br /> P Y P <>°o a< Width i n <br /> height to find u slope berm width: rc oa i 5 <br /> Qo:,,LT„ �a 63 oa Q 4oeD.e <br /> 0 xy__=lad_feet <br /> e. Multiply rock layer width by <br /> landslope to determine drop in elevation; f° Downslope Width- .i.-:-.. ...i ...._,..i.-ii .-..--•- ..-/..‘.....:.'a.-.:,...- <br /> 6 Z <br /> Absorption Width Al <br /> /0 x y %_ 100 = O -`J feet <br /> f. Add depth of clean sand for slope • <br /> Total Length B7 <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 /> 3.0 ft +0,-( ft = 3 .L1 feet <br /> g. Enter table with landslope and downslope berm ratio. Select <br /> berm multiplier of 9-7 6 <br /> h. Multiply berm multiplier by downslope mound height to get <br /> downslope berm width: <br /> '1.76 x 3,,t( =Afeet BERM SLOPE MULTIPLIERS <br /> i. Compare the values of step G.1 /// <br /> and Step G.2h /1 Z Land DOWNSLOPE UPSLOPE <br /> Slope, berm multipliers for various berm multipliers for various <br /> Select the greater of the two values as the in% berm slope ratios berm slope ratios <br /> downslope berm width; /cS- Z, feet <br /> j. Total mound width is the sum of 3:1 4:1 S:1 6:1 7:1 3:1 4:1 5:1 6:1 7:1 8:1 <br /> upslope berm (G.2d) 0 3.0 4.0 5.0 6.0 7 0 3.0 4.0 5.0 6.0 7.0 8 0 <br /> 1 3.09 4.17 5.26 6.38 7.53 2.91 3.85 4.76 5.66 6.54 7a1 <br /> width plus rock layer width (D.2) <br /> 2 3 19 4 35 5.56 6.82 8.14 2.83 3.70 4.54 5.36 6.14 6.90 <br /> plus downslope berm width(G.2i); 3 330 4 54 5.88 7 32 8 86 2 75 3 57 4 35 5 08 5 79 6 45 <br /> A°.,/ ft + /6-Z_ ft + 0 ft = ,%.6 feet 4 341 476 6.25 7.89 9 72 268 3.45 417 4.84 546 606 <br /> k. Total mound length is the sum of upslope 5 153 500 6.67 857 10.77 261 333 4.00 462 5 19 571 <br /> berm width (G.2d) plus rock layer length (D.3) 6 3.66 5.26 7 14 9 38 12 07 254 3 23 3.85 4 41 4 93 5 41 <br /> plus upslop berm width (G.2d); 7 380 556 7.69 10.34 1373 2.48 3.12 3.70 4.23 470 513 <br /> /3 ft + 6.3 ft + (3 ft = Bq feet 8 3 95 5.88 8 33 11 54 15.91 2.42 3.03 3.57 4.05 4 49 4 88 <br /> 9 4 11 6.25 9.09 13.04 18 92 2 36 2.94 3.45 390 4 30 4.65 <br /> 10 4 29 6.67 1000 15.00 23.33 2.31 2.86 3.33 3.75 4 12 444 <br /> Final Dimensions: 11 4.48 714 1111 17.65 3043 226 278 323 361 195 426 <br /> 12 1 69 7.69 12.50 21 4 3 4 3 75 2.21 2_70 312 349 3.80 408 <br />