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G. MOUND SLOPE WIDTH&LENGTH(Greater than 1%) <br /> 1. Downslope absorption width=absorption width minus rock layer width <br /> 24 feet - 10 feet= 14 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 - 2 ft= 1 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 ft+ 1ft+1 ft= 3 feet <br /> c.Upslope berm multiplier based on land sloe(see figure D-34) <br /> Select berm multiplier of 1 3.45 <br /> d.Upslope width=berm multiplier(G2c)times upslope mound height(G2b): <br /> 3.45 x 3 ft = 10.4 feet <br /> D-34: SLOPE MULTIPLIER TABLE <br /> Land UPSLOPE DOWNSLOPE <br /> Slopel multipliers for various mulliylieo for various <br /> in:o slope ratios s ope ratios <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 3A 4.0 50 6.0 7A 8A 3A 40 5.0 6A 7A <br /> 1 2.91 385 4.76 5.66 634 7.41 3A9 4.17 5.26 638 753 <br /> 2 283 3.70 434 536 6.14 6.90 3.19 435 5.56 682 6.14 <br /> 3 2.75 337 435 SAO 5.79 6.45 330 4S4 SAS 732 S86 <br /> 4 2.68 3.45 4.17 4A4 5.46 6.06 3.41 4.76 625 789 9.72 <br /> 5 2.61 333 400 4.62 5.19 5.71 353 5.00 6.67, 0-57 10.77, <br /> 6 234 3.23 385 4.41 4.73 5.41 3.66 526 7.14 938 1207 <br /> 7 2.46 3.12 3-70 423 4.70 5.13 3AO 536 7.69 1034 13.73 <br /> 8 2.42 3.03 337 4A5 4.49 488 3AS SAS 833 11.54 15.91 <br /> 9 236 2.94 3.45 3.90 430 4A5 4.11 6.25 9.09 1334 18.92 <br /> 10 231 286 333 3.75 4.12 4.44 429 6b7 1030 1530 2333 <br /> 11 2.26 2.7S 3.23 3.61 3.95 426 4AS 7.14 11.11 17.65 30.43 <br /> 12 221 2.70 3.12 3.49 380 4A6 1AA 7.69 1250 21A3 43.7S <br /> DOWNSLOPE <br /> e.Drop in elevation=rock layer width(D2)times percent landslope(C5)/100 <br /> 10 ft x 4 % /100= 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 ft= 3.4 feet <br /> g. Downslope berm multiplier based on percent land slope(see Figure D-34) 6.25 <br /> h. Downslope width=downslope multiplier(G2g)times downslope mound height(G2f) <br /> 6.25 x 3.4 = 21.2 feet <br /> i. Select greater of G1 and G2h as the downslope width 21.2 feet <br /> j.Total mound width is the sum of upslope(G2d)width plus rock layer width(D2)plus downslope width(G2i) <br /> 10.4 ft+ 10.0 ft+ 21.2 ft= 41.6 feet <br /> k.Total mound length is the sum of upslope width(G2d)plus rock layer length(D3) <br /> plus upslope width(G2d) <br /> 10.4 ft + 50.0 ft+ 10.4 ft= 70.7 ft <br /> Final Dimensions 41.6 ft x 70.7 ft <br />