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Oct 19 06 09: 09a Josh Swedlund (952) 873-3292 p. 6 <br /> • <br /> G. MOUND SLOPE WIDTH&LENGTH(Greater than 1%) <br /> 1, Downslope absorption width=absorption width minus rock layer width <br /> 20 feet - 10 feet= 10 feet <br /> 2. Calculate mound size <br /> UPSLOPE <br /> a. Determine depth of clean sand at upslope edge of rock layer=3 feet minus distance to restricting layer(C1) <br /> 3 ft - 1.8 ft= 1.2 feet <br /> b.Mound height at the upslope edge of rock layer=depth of clean sand for separation(G2a) <br /> at upslope edge plus depth of rock layer(1 foot)to depth of cover(1 foot) <br /> 1.2 ft+1 ft+1 ft= 3.2 feet <br /> c. Upslope berm multiplier based on land slo.e see figure 0-34) <br /> Select berm multiplier of 3.45 <br /> d. Upslope width=berm multiplier(G2c)times upslope mound height(G2b): <br /> 3.45 x 3.2 ft = 11.0 feet <br /> D-34: SLOPE MULTIPLIER TABLE <br /> land <br /> UPSLOPE DOWNS LO <br /> ?r1117 <br /> loe, nrullipliersfur vuioua <br /> multipliers flu v.uioua <br /> in v slope ratios +lope ra11 DI <br /> 3:1 4:1 5:1 6:1 7:1 8:1 _ 3:1 4:1 5:1 6:1 7:1 <br /> 0 3.0 CO 5.0 6.0 7-0 8.0 3.0 4.0 5.0 GD 7.13 <br /> ] 2.91 3.85 4.76 5.01. 054 741 3.09 4.17 594 6.38 753 <br /> 2 2.83 3.70 454 536 6.14 6.90 3.19 4.35 5.56 682 8.14 <br /> 3 2.75 357 435 5.05 5.79 6.45 3.30 454 588 732 8.86 <br /> 4 2.69 3.45 4.17 4.84 5.46 6.176 3.41 4.76 695 7.89 9.72 <br /> 5 2.61 3.33 4.00 4.62 5.19 5.71 333 5.00 6.67 857 1077 <br /> G 2.51 3.23 3.85 4.41 4.93 5.41 3.66 5.26 7.14 9.38 12.0+ <br /> 7 2.48 3.12 3.70 4.23 4.70 5.13 3.80 5,56 7,69 1034 13.73 <br /> 6 2.42 3.03 357 4.06 4.49 4.88 3.95 5.88 833 11.54 15.91 <br /> 9 2.36 2.94 3.45 3.90 4.30 4.65 4.11 6.25 9.09 13.04 18.92 <br /> 10 231 2.86 333 3.75 4.12 9.41 429 6.67 10.00 15.00 2333 <br /> 11 2.26 2.78 3.23 3.61 3.95 4.26 4.48 7.14 11.11 17.65 30.43 <br /> 12 211 2.70 3.12 3.49 3.80 4118 4.69 7.69 12.50 21.43 43.75 <br /> DOWNSLOPE <br /> e.Drop in elevation=rock layer width(D2)times percent landslope(C5)/100 <br /> 10 ft x 4 '/0 1100= 0.4 feet <br /> f.Downslope mound height=depth of clean sand for slope difference(G2e) <br /> at downslope rock edge plus the mound height at the upslope edge of rock layer(2b) <br /> 0.40 ft + 3.2 ft= 3.6 feet <br /> g. Downslope berm multiplier based on percent land slope(see Figure D-34) 4.76 <br /> h. Downslope width=downslope multiplier(G2g)times downslope mound height(G2f) <br /> 4.76 x 3.6 17.1 feet <br /> i.Select greater of G1 and G2h as the downslope width 17.1 feet <br /> j.Total mound width Is the sum of upslope(G2d)width plus rock layer width(D2)plus downslope width(G2i) <br /> 11.0 ft+ 10.0 ft+ 17.1 ft= 38.1 feet <br /> k.Total mound length is the sum of upslope width(G2d)plus rock layer length(D3) <br /> plus upslope width(G2d) <br /> 11.0 ft + 50.0 ft+ 11.0 ft= 72.1 ft <br /> Final Dimensions 38,1 ft x 72.1 ft 1 <br />