Laserfiche WebLink
G. MOUND SLOPE WIDTH & LENGTH Landslope > 1% slope <br /> (landslope greater than 1%) <br /> overl <br /> 1. Downslope absorption width = absorption width (F) OP o <br /> 9�: b4�o oo ed t <br /> minus rock layer width (D2) 6"Topsoil <br /> / Clean Sand l bl}ft <br /> 1 ft- ! 0 ft - ) / ft Separation ft <br /> Restricting Layer <br /> Upslo idth(G2d) Rock 4)r'dth(D2) Do- 1d1h(G2i) <br /> 2. Calculate mound size _ _It - h <br /> UPSLOPE <br /> a. Depth of clean sand fill at upslope edge of L <br /> Absorption Width-Sand(F) <br /> rock layer = 3 ft minus the distance to restricting layer (Cl) 37 <br /> 3 ft- 2'•r ft = I.0 ft <br /> b. Mound height at the upslope edge of rock D-34: SLOPE MULTIPLIER TABLE <br /> layer = depth of clean sand for separation (G2a) LanaUPSLOPE DOWNSLOPE <br /> Slope multipliers for various multiptiers for various <br /> at upslope edge plus depth of rock layer (1 ft) in! slope ratios slope ratios <br /> plus depth of cover (1 ft) 3:1 4:1 5:1 6:1 7:1 8:1 3:1 4:1 5:1 6:1 7:1 <br /> W ft + Ift + Ift = .13+0 ft 0 3.0 4.0 5.0 6.0 7.0 8.0 3.0 4.0 5.0 6.0 7.0 <br /> C. Upslope berm multiplier based on land slope 1 2.91 3.85 4.76 5.66 6.54 7.41 3.09 4.17 5.26 6.38 7.53 <br /> y^� -, (see figure D-34) 2 2.83 3.70 4.54 5.36 6.14 6.90 3.19 4.35 5.56 6.82 8.14 <br /> d. Upslope width = berm multiplier (G2c) times 3 2.75 3.57 4.35 5.08 5.79 6.45 3.30 4.54 5.88 7.32 8.86 <br /> upslope mound height (G2b): 4 2.68 3.45 4.17 4.84 5.46 6.06 3.41 4.76 6.25 7.89 9.72 <br /> X ? J f t = 4� f t 5 2.61 .33 4.00 4.62 5.19 5.71 3.53 `jJ00 6.67 8.57 10.77 <br /> 6 2.54 3.23 3.85 4.41 4.93 5.41 3.66 5.26 7.14 9.38 12.07 <br /> DOWNSLOPE 7 2.48 3.12 3.70 4.23 4.70 5.13 3.80 5.56 7.69 10.34 13.73 <br /> e. Drop in elevation = rock layer width (D2) times 8 2.42 3.03 3.57 4.05 4.49 4.88 3.95 5.88 8.33 11.54 15.91 <br /> percent landslope (C5) = 100 9 2.36 2.94 3.45 3.90 4.30 4.65 4.11 6.25 9.09 13.04 18.92 <br /> 0 ft X '/ %- 100 = ,�S' ft 10 2.31 2.86 3.33 3.75 4.12 4.44 4.29 6.67 10.00 15.00 23.33 <br /> f. Downslope mound height= depth of clean 11 2.26 2.78 3.23 3.61 3.95 4.26 4.48 7.14 11.11 17.65 30.47 <br /> sand for slope difference (G2e) at downslope 12 2'21 2.70 3.12 3.49 3.80 4.08 4.69 7.69 12.50 21.43 43.75 <br /> rock edge plus the mound height at the <br /> upslope edge of rock layer (G2b) <br /> Z'0 ft + ,'5- ft = 7s'3 ft <br /> g. Downslope berm multiplier based on percent land slop <br /> .�L? (see figure D-34) 1t " q, <br /> h. Downslope width = downslope multiplier = 101 <br /> r') i \ , <br /> 1 <br /> (G2g) times downslope mound height (G2f) L13I Upslope Wid th(G2t <br /> ft <br /> In <br /> X ,, ft = �':� ft � Upslope Width(G2d)(� '��•I 'Ro,kWidtBed (a f ,0� Upslope Width(G2d)- <br /> i. Select the greater of G1 and G2h as the Length(D3) <br /> �,ctis C�asy, <br /> downslope width: 14� ft Fo Downslope Width(G2i) .Z'y ft <br /> j. Total mound width is the sum of upslope Absorptiln WidthcF>�2 <br /> width (G2d) width plus rock layer width <br /> (D2) plus downslope width (G2i) _ ti')t - Total Length(G2k) ft <br /> )"") ft + /() ft+ a-1) ft = Li ft <br /> k. Total mound length is the sum of upslope width (G2d) <br /> plus rock layer length (D3) plus upslope width (G2d) <br /> 10 ft + L,.z ft + 10 ft = <br /> F1nd1 Dimensions: <br /> `f 3 \AJ x y 1 1 \_ <br /> I hereby certify that I have completed this work in accordance with applicable ordinances, rules and laws. <br /> (signature) ` f (license#) (date) <br />