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3• ABSI�RPTION AREA SIZING Note:Mound setbacks are measured from the Absorption Area. A. Calculate Absorption Width:Bed Width (2.6)X Mound Absorption Ratio (t.F)=Absorption Width 10.0 ft X 2.6 = 26.0 ft B. For slopes>1%,the Absorption Width is measured downhill from the upslope edge of the Bed. Calculate Downslope Absorption Width:Absorption Width (3.A)-Bed Width (2.B)=ft 26.0 ft - 10.0 ft = 16.0 ft 4• MOUND SIZING A. Calcutate Clean Sand Lift: 3 feet minus Depth to Limiting Condition (1.C)=Ctean Sand Lift (1 ft minimum) 3.0 ft - 1.2 ft = 1.8 ft Design Sand Lift (optional): ��1.8 B. Calculate Upstope Height:Clean Sand Lift (4.A)+medio depth (1 ft.)+cover (1 ft.)=Upslope Height 1.8 ft + 1.0 ft + 1.0 ft= 3.8 ft U�14:SlopeMuitipiierTdbl? Land Slope� (� i 1 3 4 5 6 7 8 9 i0 i I 12 i 3 ta is 16 11 18 I4 1A 2I 22 23 24 15 UpSIOp? '?:( i.P: 3.91�2,yJ 2.75 %.5E 1.51 2.41 :.� t.d2 2.3b 2il 2.25 _'.Tt �.1? i.�3 2.uY 2.[u 2.U� i.00 �91 1.» I."r3 13t I.@9 1.�7 1.85 j Bat�iil Fd(`0 ia:i d.�Ci ?.BS i 70 's.57 3.�15 33i 3.23�3.12 3.03 2.94 2.fib 1.I8 2.70 1.62 2.55 2.� 2�d1 2.35 2.24 2.23 2,18 2.ti L�8 2A3 1.98 I.i's Land Slope� 0 1 � 2 1 4 5 ' 6 7 8 9 IG II It li 14 f5 I6 il iF 19 20 21 It t3 2d 25 � ['G';tnSlo�.'P ;;:1�3.id: 3.f"t;>.ii i.i0 i.J1�3.53';,66�;.F.O 3.i5 1.11�-419 �.:? =.SS :.55,51J�)-i5 5.E? R.21 �.Ei ?.N ?.A ?.91 E.a'( 3.4i��.a6 I�.i�ti ! E�9ilit R�1,10 �d:t d.OD�.',l J.3s a.5�t d.16 5.4U 5.26 5.56 5.83 6,25 6.67 1.1-1 7.69 8.25 892 9.57 10.td 10.9�! ll.61 12,d2 13.i9 �L� 14.32 'S.67 �6.5a I7..W Select Ups(ope Berm Mu(tiplier �' (based on land slope): 3.33 (figure D-34) D. Catculate Ups(ope Berm Width:Mu(tiplier (4.C)X Upslope Mound Height (4.6)=Upslope Berm Width 3.33 ft x 3.8 ft = 13.0 ft E. Catcutate Drop in Elevation Under Bed:Bed Width (2.6) X Land S(ope (1.D)=100=Drop (ft) 10.0 ft X 6.0 % : �oo= 0.60 ft F. Calculate Downs(ope Mound Height:Upslope Height (4.6)+Drop in Elevation (4.E)=Downslope Height 3.8 fc + 0.60 ft = 4.4 ft � Select Downslope Berm Mu(tip(ier (based on land stope): 5.26 (figure D-34) H. Calculate Downslope Berm Width:Multiplier (4.G)X Downs(ope Height (4.F)=Downslope Berm Width 5.26 x 4.4 ft = 23.0 fc I. Calculate Minimum Berm to Cover Absorption Area:Downslope Absorption Width (3.6 or 3.C)+4 ft. =ft 16.0 ft + � ft = 20.0 ft J. Design Downs(ope Berm =greater of 4H and 41: 23.0 ft K. Select Endslope Berm Mu(tip(ier: 3.00 (usualty 3.0 or 4.0) L. Calculate Endsfope Berm (4.K)X Downsfope Mound Heiqht (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)+Downs(ope Berm Width (4.J)=ft 13.0 ft + 10.0 fc + 23.0 ft = 46.0 ft N. Calcutate Mound Length:Endstope Berm Width (4.L)+Bed Lenqth (2.C)+Endslope Berm Width (4.L)=ft 13.0 ft + 63.0 ft + 13.0 ft = 89.0 tt Comments: