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' 3. ABSORPTION AREA SIZING Note:Mound setbacks ore measured from the Absorption Area. A. Calculate Absorption Width:Bed Width (2.6)X Mound Absorption Ratio (1.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. Catculate Downslope Absorption Width:Absorption Width (3.A)-Bed Width (2.6)=ft 26.0 ft - 10.0 ft = 16.0 ft 4. MOUND SIZING A. Calculate C(ean Sand Lift: 3 feet minus Depth to Limitinq Condition (1.C)=Cleon Sand Lift (1 ft minimum) 3.0 ft - 1.5 ft = 1.5 ft Design Sand Lift(optional): �1.5 B. Calculate Upslope Height:C(ean Sand Lift (4.A)+media depth (t ft.)+cover (1 ft.)=Upstope Heiqht 1.5 ft + 1,0 ft + 1.0 ft= 3.5 ft D-?-,:�lo[e'.tuitiplier Tahir � Ld(1dSI0pt+;5 0 I 2 3 4 5 6 1 8 9 iQ II 11� 13 id IS 16 f7 '8 14 20 21 22 13 Z4 1� i I Up�19R? I's:1 ?.00 2.51�i.3i 1.15 2.5$ 2.Si 2.Ss�2.�49 Lai �.35��.31i2.2� 2.;I�T.'? i.�?ji.CS i.05 ?.u; ?.00� 1.9? 1.9> I."r� l.i� i.89 1.8' L?i! j E��7n hd;'n jd:i �.�J i.85 i.i0 3.57 3.d5 J.33�3.23 3J2 ?.D3 2.9a�?.8b 2.78 2.70 2.b2 2.55 2.�8 ?.at 2.35 214 ?.23 2.18 2.13 2.08 1.Di 198 1.9�j I LandSlope`b 0 1 3 a 5 h 7 9 9 10 il 11 ' !7 i3 I5 I4 �1 IB 19 10 21 2t 13 24 25 i � DO';;I151rp? �`1:1 3.1N :.C'>�3.'i 3.i^ i.al 3.53�i.Eb�i.F.t ?55 4.0 419�:.1�3 �.SS�'�5�i,'tJ i.i5 5.89 6.2�! �.63 7.0: 7..1.'• ?.=>i 9.�1:�3.9's 9.�t6 it�.U�� �� E�Ifii R�i�i; i4:1 ;.DO �.17 J.35 J.�l d.76 9.� 5.I6 5.55 5.B6 b,i5 5.b1 ?,ta 7.65 E."t5 8.92 951 10.2a 10.4J it.67 12.J2 13.14 '3.59 W.8't �5,67 ?6.5� 17..�:� � Select Upslope Berm Mu(tip(ier (based on land slope): 2.70 (figure D-34) D. Calculate Ups(ope Berm Width:Multip(ier (4.C)X Ups(ope Mound Height (4.B)=Ups(ope Berm Width 2.70 ft X 3.5 ft = 10.0 ft E. Calculate Drop in Elevation Under Bed:Bed Width (2.B) X Land S(ope (1.D):100=Drop (ft) 10.0 ft x 12.0 % : i oo= 1.20 ft F. Calcutate Downstope Mound Height:Upslope Height (4.6)+Drop in Elevation (4.E)=Downslope Height 3.5 ft + 1.20 ft = 4.7 ft G Select Downs(ope Berm Multip(ier (based on land stope): 5.32 (figure D-34) H. Calculate Downslope Berm Width:Mu(tip(ier (4.G)X Downslope Height (4.F)=Downslope Berm Width 5.32 x 4.7 ft = 25.0 ft I. Calculate Minimum Berm to Cover Absorption Area:Downs(ope Absorption Width (3.6 or 3.C)+4 ft. =ft 16.0 ft + �� ft = 20.0 ft J. Design Downslope Berm =greater of 4H and 41: 25.0 ft K. Select Endslope Berm Multiplier: 3.00 (usualty 3.0 or 4.0) L. Calcutate Ends(ope Berm (4.K)X Downs(ope Mound Height (4.F)=Ends(ope Berm Width 3.00 ft X 4.7 ft = 15.0 ft M.Calculate Mound Width: Upslope Berm Width(4.D)+Bed Width (2.6)+Downs(ope Berm Width (4.J)=ft 10.0 ft + 10.0 ft + 25.0 ft = 45.0 ft N. Catculate Mound Length:Endslope Berm Width (4.L)+Bed Lenqth (2.C)+Endslope Berm Width (4.L)=ft 15.0 ft + 63.0 ft + 15.0 ft = 93.0 ft Comments: