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G. MOUND SLOPE WIDTH&LENGTH (Greater than 1%) <br /> 1. Downslope absorption width =absorption width minus rock layer width <br /> 27 feet - 10 feet= 17 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 - 1.5 ft= 1.5 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 /> 1.5ft+ 1ft+ 1 ft= 3.5 feet <br /> c.Upslope berm multiplier based on land slope(see figure D-34) <br /> Select berm multiplier of 3.33 <br /> d. Upslope width=berm multiplier(G2c)times upslope mound height(G2b): <br /> 3.33 x 3.5 ft = 12.0 feet <br /> DOWNSLOPE <br /> e. Drop in elevation=rock layer width(D2)times percent landslope(C5)/100 <br /> 10 ft x 6 % /100=' 0.6 feet • <br /> • <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 /> 0.60 ft + 3.5 ft= 4.1 feet <br /> g. Downslope berm multiplier based on percent land slope(see Figure D-34) 5.26 <br /> h. Downslope width=downslope multiplier(G2g)times downslope mound height(G2f) <br /> 5.26 x 4.1 = 21.0 feet <br /> i. Select greater of G1 and G2h as the downslope width 21.0 feet <br /> j.Total mound width is the sum of upslope(G2d)width plus rock layer width(D2)plus downslope width (G2i) <br /> 12.0 ft+ 10.0 ft+ 21.0 ft= 43.0 feet <br /> k.Total mound length is the sum of upslope width (G2d)plus rock layer length (D3) <br /> plus upslope width(G2d) <br /> 12.0 ft + 50.0 ft+ 12.0 ft= 74.0 feet <br /> Final Dimensions (slope>1%) 43.0 ft x 74.0 ft <br /> I hereby certify that I have completed this work in accordance with all applicable ordinances, rules and laws <br /> (signature) 810 (license#) <br /> Page 2of6 <br />