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4. MOUND SIZING <br /> A. Calculate Clean Sond Lift: 3 feet minus Depth to Limiting Condition (1.C)=Clean Sond Lift (1 ft minimum) <br /> 3.0 ft - 2.0 ft = 1.0 ft <br /> B. Calculate Upslope Height: Clean Sand Lift (4.A)+media depth (1 ft.)+cover (1 ft.)=Upslope Height <br /> 1.0 ft + 1.0 ft + 1.0 ft= 3.0 ft <br /> D-34:SloDe Multiplier Table <br /> LiBd 5i0pe% 0 1 2 3 4 5 6 7 6 9 10 it 12 13 t4 15 16 17 16 19 2Q 21 22 23 24 25 <br /> UpSI0p2 3;1 3.00 2.91 2.83 2.75 2.68 2.61 2.5�1 2.A6 2.42 2.36 2.31 2.26 2.11 2.17 2.13 2.09 2.06 2.03 2.00 1.97 1.95 1,93 1.41 1.89 1.87 1.85 <br /> Berm Ratia 4:1 4.00 3.85 3.70 3.57 3.45 3.33 3.23 3.12 3.03 2.94 2.86 2.78 2.70 T.62 2.55 2.I8 IAi 2.35 2.29 2.23 2.18 2.13 2.08 2.03 1.98 1.93 <br /> Lind SIOp!!6 0 1 2 3 4 5 6 7 8 9 to 1 t 12 13 14 15 16 17 18 19 20 21 22 13 24 25 <br /> UownSlope 3:1 3.00 3.09 3.19 3.30 3.41 3.53 3.66 3.80 3.95 4,11 a.29 4.a8 4.69 a.95 5.14 5.55 5.86 6.24 6.63 7.a1 7.a7 7.93 8.42 8.93 9.d6 10.02 <br /> BBfltl Rdt10 4:1 4.OD 4.17 4.35 4.54 4.76 5.00 5.26 5.56 S.HB 6.25 6.67 7.t4 7.69 8.29 8.92 9.57 10.24 10.94 11.67 12.42 13J9 13.99 14.82 15.67 16.54 17,4t <br /> � Select Upslope Berm Multiplier <br /> (based on land slope): 2•78 (figure D-34) <br /> D. Calculate Upslope Berm Width:Multiplier (4.C)X Upslope Mound Height (4.6)=Upslope Berm Width <br /> 2.78 ft X 3.0 ft = 8.3 ft <br /> E. Calculate Drop in Elevation Under Bed: Bed Width (2.B) X Land Slope (1.D)= 100=Drop (ft) <br /> 10.0 ft x 11.00 % T 100= 1.10 ft <br /> F. Calculate Downslope Mound Height: Upslope Height (4.6)+Drop in Eievation (4.E)=Downslope Height <br /> 3.0 ft + 1.10 ft = 4.1 ft <br /> Select Downs(ope Berm Multiplier <br /> �' (based on land slope): 7.14 (figure D-34) <br /> H. Calculate Downslope Berm Width:Multiplier (4.G)X Downslope Height (4.F)=Downslope Berm Width <br /> 7.14 x 4.1 ft = 29.3 ft <br /> I. Calculate Minimum Berm to Cover Absorption Area:Downslope Absorption Width (3.6 or 3.C)+4 ft. =ft <br /> 14.0 ft +�4 ft = 18.0 ft <br /> J. Design Downslope Berm =greater of 4H and 41: 29.3 ft <br /> K. Select Endslope Berm Multiplier: 2.50 (usually 3.0 or 4.0) <br /> L. Calculate Endslope Berm (4.K)X Downs(ope Mound Height (4.F)=Endslope Berm Width <br /> 2.50 ft x 4.1 ft = 10.3 ft <br /> M. Calculate Mound Width: Upslope Berm Width(4.D)+Bed Width (2.6)+Downslope Berm Width (4.J)=ft <br /> 8.3 ft + 10.0 ft + 29.3 ft = 47.6 ft <br /> N. Calculate Mound Length: Endslope Berm Width (4.L)+Bed Length (2.C)+Endslope Berm Width (4.L)=ft <br /> 10.3 ft + 62.5 ft + 10.3 ft = 83.0 ft <br />