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'3. AB50RP'TION AREA SIZING <br /> Note:Mound setbacks are meawred from[he Absorption Area. <br /> A. Calculate Absorption Width:Bed Width (2.6)X Mound Absorption Ratio (1.F)=Absorption Width <br /> 10.0 ft X 2.0 = 20.0 ft <br /> B. For slopes>1%,the Absorption Width is measured dovmhill from the upslope edge of the Bed. <br /> Calculate Downslope Abwrption Wfdth:Absorption Width (3.A)-Bed Width (2.8)=ft <br /> 20.0 ft - 10.0 ft = 10.0 ft <br /> 4. MOUND SIZING <br /> A. Catculate Clean Sand Lift: 3 feet minus Depth to Limiting Condition (1.C)=C(ean Sandlift (1 ft minimum) <br /> 3.0 ft - 1.2 ft = 1.8 ft Design Sand Lift(optional): C��,g <br /> B. Calculate Upslope Height:Clean Sand Lift (4.A)+media depih (1 ft.)+cover (1 ft.)=Ups(ope Hetght <br /> 1.8 ft + 1,0 ft + 1.0 ft= 3.8 ft <br /> J�?d:SIoG�:Muitiplirr Tablr <br /> LEnd Slope°6 o I 2 3 4 5 6 7 B 9 IO I I 12 13 II i5 I6 il 18 19 20 2I 21 23 24 15 <br /> Upslnpp ,3:i 3,UC Z.9i L.BJ 2?S Z.�iB 1.51 Z.Sd Z..{) 1..{2 �.36 2.:1 2.25 2.i1 i'7..+3 LC9 L05 i.6; L�C i.4? I,55 1.S"s 1.St I.B9 1.87 �.8i <br /> Berm RaCo ly:t J.00 3.85 3.70 3.57 3.d5 3.33 3.23 3.�2 ).03 Z.9d 2.&6 2,16 2.10 2.62 2.95 Z.a8 2.at 2.35 2.29 2,23 2.18 2.i3 2.08 1.Oi I.98 1.93 <br /> land S�ope n 0 1 1 3 4 9 6 1 8 9 !Q 11 12 13 IA IS 16 il 18 1? 20 21 11 23 14 25 <br /> Grnmslope i3:1 3.00 ;.Oi s.'9 i.n i.al 3.53 i.66 3.&J 3.55 1.11 a.2� 4.d6 1.64:.95 5'(a 555 5.88 6.2a 6.61 7.1U 7..17 1.9i A.a't 3.93 9.J6 1Q.0'[ <br /> BPI"Ot Rd::O �y:l J.00 J.17:.35 a.5d 4.76 5.90 516 5.56 5.e8 6.25 6.6?7.ta 7.69 8.24 8.91 9.57 t0.ld 10.yd 11.67 12.J2 13.19 13,99 iJ,82 t5.61 16.5J 17..N <br /> � Setect Upslope Berm Multiplier <br /> �based on land slope): 2.48 (figure D-34) <br /> D. Ca�ulate Ups(ope Berm Width:Multipfier (4.C)X Upslope Mound Hefght (4.B)=Upslope Berm Width <br /> 2.48 ft X 3.8 ft = 10.0 ft <br /> E. Calculate Drop in E(evation Under Bed:Bed Width (2.6) X Land 5(ope (1.D)a 100=Drop (ft) <br /> 10.0 ft X 7.0 % + 100= 0.70 ft <br /> F. Calculate Uownslope Mound Height:Ups(ope Hefqht (4.6)+Drop in Elevation (4.E)=Downs(ope Height <br /> 3.8 n + 0.70 ft = 4.5 ft <br /> G Select Downslope Berm Multiplier <br /> (based on land slope): 5.56 (figure D-34) <br /> H. Calculate Downslope Berm YWdth:Multiplier (4.G)X Downslope Height (4.F)=Downsfope Berm Width <br /> 5.56 x 4.5 ft = 25.0 ft <br /> I. Calculate Minimum Berm to Cover Absorption Areo:Downs(ope Absorption Width (3.6 or 3.C)+4 ft.=ft <br /> 10.0 ft * �� ft = 14.0 ft <br /> J. Design Dovmslope Berm =greater of 4H and 41: 25.0 ft <br /> K. Select Ends(ope Berm Multiplier: 3.00 (usually 3.0 or 4.0) <br /> L. Calculate Endslope Berm (4.K)X Downslope Mound Height (4.F)=fnds(ope 8erm Widfh <br /> 3.00 ft X 4.5 ft = 13.0 ft <br /> M.Calculate Mound Width:Upslope Berm Width(4.D)+Bed Width (2.6)+pownslope 8erm Width (4.J)=ft <br /> 10.0 ft + 10.0 ft • 25.0 fc = 45.0 fc <br /> N. Calculate Mound Length:Endslope Berrrr Width (4.L)+Bed Length (2_C)+Endslope Berm Width (4.L)=ft <br /> 13.0 tt + 50.0 ft + 13.0 ft = 76.0 ft <br /> Comments: <br /> r <br />