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3. ABSORPTION AREA SIZING Note:Mound setbacks are meawred from the Absorption Area. A. Calcutate 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. Calcutate 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 Cleon Sand Lift: 3 feet minus Depth to Limiting Condition (1.C)=Clean Sand Lift (1 ft minimum) 3.0 ft - 1.3 ft = 1.7 ft Design Sand Lift (optional): U1'7 B. Calculate Upsfope Heiqht:Cleon Sand Lift (4.A)+medio depth (1 ft.)+cover (1 ft.)=Upslope Heiqht 1.7 ft + 1.0 ft + 1.0 ft= 3.7 ft G la:Sioprlduiriplier�abir Land SIOpe o 0 I 2 3 4 S � h 7 8 9 10 11 i2 13 id 15 ib 17 I8 I9 i0 21 22 13 24 2S i 1ip51i,po j;:l 3.P� 2.9I;�.S3 2.?5 'c.58 2.51}2.51,2.a3 2.a? 2.35�?.i1,2.25 2.21�2.;��t,�3 ?.c5 1.t� ?.03 2.U0 1.91 I.ii i.i3 1.5; 1.?9 1.8? 1.85 � �?i"O1�t;CG ��l:I �I.Oi� �.d5 ?.7i� 3.SJ i.a5 ?.3iI31i 3.t't 3.Q3 2.S�t 2.86j2J8 2.70 2.b2 "[.55 2.d8 2.YI ?-35 2.29 2.23 2.18 L13 2.08 2.0's I.y3 l.ii•; L2nd$IOpE`.a U I 2 • i 4 5 ; h 7 8 9 10 1I 12 � 11 I4 15 16 17 18 i4 t0 21 22 23 t4 25 I I �'0:'Iii�C;!4 ,:! '.UC�lQ4 i,'i '� i.al 3.5? i.66�3.E� ).ii 1.11 �l.2i ;.:a >.6'��:.v��i2.3 i.i5 S.fi? 6.?d 5.63 ?.0. ?.a' ?.9i 9.ai ?.9; i..µ, .5i� Epint fi,j:�; 'a:i ;.0� �!? �.35 a.5� �.?5 5.00 5.26 5.5h 5.68 6.25 6.5? 7.tJ 7.6y 8.29 8.92 9.5? id.2a Id.9a 11.61 12.di 13.19 t3.99 1a.82 15.61 ?6.5d t7..�: � Select Upslope Berm Multiplier (based on land slope): 3.23 (figure D-34j D. Calculate Ups(ope Berm Width:Multiplier (4.C)X Upslope Mound Height (4.6)=Upsfope Berm Width 3.23 ft x 3.7 ft = 12.0 fc E. Calculate Drop in Elevatron Under Bed:Bed Width (2.6) X Land S(ope (1.D):100=Drop (ft) 10.0 ft x 9.0 % : �oo= 0.90 ft F. Calculate Downslope Mound Height:Ups(ope Height (4.B)+Drop in E(evation (4.E)=Downslope Height 3.7 ft + 0.90 ft = 4.6 ft Seleci Downslope Berm Multiplier �' (based on land slope): 5.44 (figure D-34) H. Calculate Downslope Berm Width:Mu(tiplier (4.G)X Downs(ope Height (4.F)=Downslope Berm Width 5.44 x 4.6 ft = 25.0 ft I. Calculate Minimum Berm to Cover Absorption Area_Downslope Absorption Width (3.B 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 (usually 3.0 or 4.0) L. Calculate Endslope Berm (4.K)X Downslope Mound Height (4.F)=Ends(ope Berm Width 3.00 ft X 4.6 ft = 14.0 ft M.Catculate Mound Width:Upsfope Berm Width(4.D)+Bed Width (2.B)+Downslope Berm Width (4.J)=ft 12.0 ft + 10.0 ft + 25.0 ft = 47.0 ft N. Calcutate Mound Length:Endstope Berm Width (4.L)+Bed Length (2.C)+Endslope Berm Width (4.L)=ft 14.0 ft + 63.0 ft + 14.0 ft = 91.0 ft Comments: