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' 3. ,ABSORPTION AREA SIZING � Note:Mound setbacks are measured from the Absorption Area. A. Calculate Absorption Width:Bed Width (2.6)X Mound Absorption Rotio (1.F)=Absorption Width 10.0 ft X 2.0 = 20.0 ft B. For slopes>1%,the Absorption Width is measured downhill from the upslope edge of the Bed. Calculate Downs(ope Absorption Width:Absorption Width (3.A)-Bed Width (2.6)=ft 20.0 ft - 10.0 ft = 10.0 ft 4. MOUND SIZING A. Calculate Clean Sond Lift: 3 feet minus Depth to Limiting Condition (1.C)=Cleon Sand Lift (1 ft minimum) 3.0 ft - 1.8 ft = 1.2 ft Design Sand Lift(optional): �1.2 B. Calculate Upslope Hei3ht:Cleon Sand Lift (4.A�+media depth (1 ft.)+cover (1 ft.)=Ups(ope Height 1.2 ft + 1.0 ft + 1.0 ft= 3.2 ft : ;:��o.e G,u�.�ml;e��acl� � LandSfope`b o i � 2 3 a 5 6 1 s 4 i0 ii i2 �3 i ia i5 i(� !7 � ?B 1? ; i�+�1i ii I �3 � t» � t; f i I.✓.I�pa ',i:t ?C� 2.`;1�233�'t.'c :6k [.51 L$= 2.J3 i.a2 •'_.3�i� sliZ'b�:.Lljt'J�2.': �:4 LUS !.U; 'ik i.i? I.ii� I.i; I'�� L�4�1 tl��Ls?i � E'�tRl n<�n ;.l:1 �.� 3.85�3JU 3.51 ;.�15 l.i3�31i�3.i2 3.03 t.9�1 t.d5.2]E i.10 `t.bi 2.55 2.� t.dt 235 ?.24 2..s 2,18 L!i 2..8�2.Gi L9S i.4's' , Land$lope.`�: � I ' t 3 4 S b 7 8 9 10� I I 12 13 14 IS 15 11 18 19 10 2I 22 23 24 2S � � �0'::I1S�Ct;� �:I lty' �QY�i.'9�'s30 :.�t1�:.S?13.56�;.@L 3.�ii 1.11 �t2l�J.� �7�;4��itli5.i5 S.r3 �.2- E.6: 7.N '.J' '.9; 9.�� d.ii i.-!F ,_ I Rp��1Rdi'�� 'd:i ;.t�G a,;?�a.;5 d,5-1 .?5 5�4�0 5.25 5.�6 '.R8 E.25,6.b7 ?.1,�7.6YIa.2518:�2 9.57 10.'[4 Ip,S-4 it.57 12.�t1 ;3.19 13.99 �d,82I'S.E7�'6.�=11�.�i=; Select Upslope Berm Muftiplier �' (based on land slope): 2.21 (figure D-34) D. Calcutate Ups(ope Berm Width:Multiplier (4.C)X Ups(ope Mound Heiqht (4.6)=Ups(ope Berm Width 2.21 ft X 3.2 ft = 7.0 ft E. Calculate Drop in E(evation Under Bed:Bed Width (2.B) X Land Slope (1.D): 100=Drop (ft) 10.0 ft X 12.0 % : 100= 1.20 ft F. Calculate Downslope Mound Height:Ups(ope Height (4.6)+Drop in E(evation (4.E)=Downsfope Height 3.2 ft + 1.20 ft = 4.4 ft G Select Downslope Berm Multiplier (based on land slope): 4.69 (figure D-34) H. Calculate Downslope Berm Width:Muttiplier (4.G)X Downs(ope Height (4.F)=Downslope Berm Width 4.69 x 4.4 ft = 21.0 ft 1. Calculate Minimum Berm to Cover Absorption Area:Downslope Absorption Width (3.6 or 3.C)+4 ft. =ft 10.0 ft + � ft = 14.0 ft J. Design Downslope Berm =greater of 4H and 41: 21.0 ft K. Select Ends(ope Berm Mu(tip(ier: 3.00 (usually 3.0 or 4.0) L. Calculate Endstope Berm (4.K)X Downslope Mound Height (4.F)=Ends(ope Berm Width 3.00 ft x 4.4 ft = 13.0 ft M.Calculate Mound Width: Upslope Berm Width(4.D)+Bed Width (2.6)+Downslope Berm Width (4.J)=ft 7.0 ft + 10.0 ft + 21.0 ft = 38.0 ft N. Calculate Mound Length:Endslope Berm Width (4.L)+Bed Length (2.C)+Ends(ope Berm Width (4.L)=ft 13.0 ft + 63.0 ft + 13.0 ft = 89.0 ft Comments: