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(;. I )OWNS11)l 1. BERM WII).1-1 I tf rT 1 <br /> 1. If landslope is 1% or more, - -; ,..-ter..'•.*- .,.•ST•'. ,,4�5. <br /> subtract rock layer width from adsorption width ty4,6* ,,.1...7.;soo. 0o ` ';_ <br /> to obtain minimum downslopeI i �5;;=°�{ ( Rock 1' ,i,•1,., tay ;r, `Y;-:rte <br /> berm toe 4*.e ,Zaz�. Clean Sand-- -. e••`,i•',c <br /> 6..Topsoil 4T <br /> ft - It ft = 1{, - 7 feet Natural Sod <br /> NM <br /> 2. Calculate Minimum mound Size -- <br /> a. Determine depth of clean sand fill at 11p.1ope Width Downslope Width <br /> upslope edge of rock layer: ..._- Rock Width Absorption Width - "---~ <br /> Separation 3' - Z ft = 1 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 .a feet <br /> c. Enter table with landsiope and upslope berm Upope Width <br /> ratio. Select berm multiplier of 3 • 2_3 a neo _ � <br /> b U sla e Width tFQ.-,�ODbe• Rock Bed ?o ooed 1.-I <br /> d. Multiply berm multiplier by upslope mound ..„....- 4,..-4,k 6 Up l Width <br /> . Width 73 <br /> height to find upslo2e berm width: ,T; Len ,_.,,,,:w:,,....„ <br /> L „...0 0 • <br /> o. Qoc-6n�_,p0 -e°..,,,-0,-.4....,.."...gaC <br /> 3 0 x 3.2�_ feet <br /> e. Multiply rock layer width by 3 <br /> A <br /> landsiope to °� 1 OO =determine drop in elevation; F Downslope Width , 9 - <br /> X 6 Absorption Width 6-? - <br /> Q.G feet <br /> f. Add depth of clean sand for slope <br /> difference (2e)at downslope edge, to Total et'gtl' <br /> the mound height at the upslope edge <br /> of rock layer (2b) to find the downslope height; <br /> 'g.0 ft +0.6 ft= 3.6 feet <br /> g. Enter table with landsiope and downslope berm ratio. Select <br /> berm multiplier of 5-26 . <br /> h. Multiply berm multiplier by downslope mound height to get <br /> downslope berm width: <br /> 5.26 x 3.6 = gfeet / BERM SLOPE MULTIPLIERS <br /> i. Compare the values of step G.1/U" -7 <br /> and Step G.2h a ci Land DOWNSLOPE UPSLOPE <br /> Slope. berm multipliers for various berm multipliers for various slopeSelect the greater of the two values as the in% berm slope ratios berm ratios <br /> downslope berm width; /9. cr feet <br /> 3:1 4.l 5:1 6:1 7:1 3:1 4 l 5:l 6 1 7:l 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 8.0 <br /> upslope berm (G.2d) <br /> ' 3.09 4.17 S16 6.38 7.53 2.91 3.85 4.76 5.66 6.54 741 <br /> width plus rock layer width (D.2) <br /> - <br /> plus downslo�pe berm width(G.2i); 2 3 19 4 35 5 56 6.82 814 2.83 3.70 454 5 36 6 14 690 <br /> 7 + �(// ft + l� f t 3 3 30 4 54 5.88 7 32 8.86 2.75 3.57 4 35 5 08 5 79 6 45 <br /> - '6 feet 4 34! 476 625 789 972 2.68 345 4 !7 484 546 606 <br /> k. Total mound length is the sum of upslope 5 3 5_: 5 00 667 857 10.77 2.61 3.33 4.00 4.6? 5.19 5 71 <br /> berm width (G.2d) plus rock layer length (D.3) 6 366 5 26 7 14 9.38 1207 254 3.23 3.85 4.41 493 54! <br /> plus upslope berm width (G.2d); 7 3 80 S 56 7 69 10.34 13 73 2.4s 3 12 3.70 4 23 4 70 5 13 <br /> / ft + T. _ft + 13 ft = /i- feet 8 3 95 5 88 8 33 11.54 15 91 2.42 303 3.57 4 05 4 49 4 88 <br /> 63 9 9 411 625 909 13.04 1892 236 294 345 390 430 465 <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.6 I! 448 7l4 1111 17-65 3041 2.26 278 323 361 395 4 6 <br /> 3g• X / <br /> 12 4 69 7 69 12.50 21_43 43 75 2.21 2 70 3 12 3.49 3 80 4 08 <br />