Laserfiche WebLink
• .5;!C/" <br /> 3. ABSORPTION AREA SIZING <br /> � Note:Mound setbacks are measured from the Absorption Area. <br /> A. Calculate Absorption Width:Bed Width (2.6)X Mound Absorption Ratio (t.F)=Absorption Width <br /> 10.0 ft X 2.0 = 20.0 ft <br /> B. For slopes>t%,the Absorption Width is measured downhill from the upstope edge of the Bed. <br /> Calculate Downslope Absorption Width:Absorption Width (3.A)-Bed Width (2.6)=ft <br /> 20.0 ft - 10.0 ft = 10.0 ft <br /> 4• MOUND SIZING <br /> A. Calculate Clean Sand Lift: 3 feet minus Depth to Limiting Condition (t.C)=C/ean Sand Lift (1 ft minimum) <br /> 3.0 ft - 1.3 ft = 1.7 ft Design Sand Lift(optional): �1.7 <br /> B. Calculate Ups(ope Height:Clean Sand Lift (4.A)+media depth (1 ft.)+cover (1 ft.)=Upslope Heiqht <br /> 1.7 ft + 1.0 ft + 1.0 ft= 3.7 ft <br /> [r.)e:;Inpr Mu1r.;plier Table <br /> , LandSlope7� 0 f t 3 4 5 6 1 8 9 10 11 12 i3 I4 i5 ib �7 I8 19 20 ti 22 t3 24 15 <br /> � Up5�0� �3:1 ).t�� 291 2.9) 2.'S ?.58 2.51,L5� 2.�3 1.1i r.35 2.?I 2.25 2.21 2.':l 2.11 2.C5 2.Q5 2.Q; L(�C I.fl l.i) I.ii I5: ' 1.99 i.@7 1.8i <br /> I 6�rn�Ra:�i j�:� �.QO i,d4 3.10 3.57 3.a4 i.33 3.23 3.t2 3.D3 2.94 2.�i 2.1E 2.10 2.62 2,55 1.�Itl 2.di 2.35 2.29 2.23 2J8 2.i3 2.08 2.C�3 1.98 1.93 <br /> , LandSlope`.5 Q I � 2 3 4 S 6 7 8 9 i i� 1f i1 ?3 14 i 15 16 il i8 19 2U 21 22 23 14 25 ; <br /> � [�r�vOSlO� j3:I 3.L0 3.C'i 'sJ9 3'10 3.a1 3.51 3.56 i.EO 3.95 a.1i�1,2� d..3 1.6Y`�.'i5�;�,�iSS 5.86 6.2�3 6.63 7.1: 7..{7 ?.4: B.d"E B.9; 3..1� ;u.��i' <br /> 6�ifn Rd,`0 �t:t w.OG ».'7�.35 a.0 iJb S.fA 5.26 S.Sb 5.88 6.25�5.6� ?.id 7.65 8.25 892 9.57 tU.2�1 10.4J ii.67 12..2 13.19 t3.99 �.1.82 t5.E7 16.5� I1.�:� <br /> � Select Upsfape Berm Muttiplier <br /> (based on land slope): 2.48 (figure D-34) <br /> D. Calculate Upslope Berm Width:Multiplier �4.C)X Upslope Mound Height (4.6)=Upslope Berm Width <br /> 2.48 ft x 3.7 ft = 9.0 ft <br /> E. Calculate Drop in Elevotion Under 8ed:Bed Width (2.6) X Land Slope (1.D):100=Drop (ft) <br /> 10.0 fc X 15.0 % = too= 1.50 ft <br /> F. Calculate Downslope Mound Height:Upslope Height (4.6)+Drop in Elevation (4.E)=Downs(ope Height <br /> 3.7 ft + 1.50 ft = 5.2 ft <br /> G Select Downs(ope Berm Muftip(ier <br /> (based on land slope): 5.55 (figure D-34) <br /> H. Calcutate Downs(ope Berm Width:Multiplier (4.G)X Downslope Height (4.F)=Downslope Berm Width <br /> 5.55 x 5.2 ft = 29.0 ft <br /> I. Calculate Minimum Berm to Cover Absorption Area:Downs(ope Absorption Wfdth (3.6 or 3.C)+4 ft. =ft <br /> 10.0 ft + �_� ft = 14.0 ft <br /> J. Design Downslope Berm =greater of 4H and 41: 29.0 ft <br /> K. Select Endslope Berm Mu(tiplier: 3.00 (usually 3.0 or 4.0) <br /> L. Calculate Ends(ope Berm (4.K)X Downslope Mound Height (4.F)=Ends(ope Berm Width <br /> 3.00 fc x 5.2 ft = 15.0 ft <br /> M.Calcutate Mound Width: Upslope 8erm Width(4.D)+Bed Width (2.6)+Downslope Berm Width (4.J)=ft <br /> 9.0 ft + 10.0 ft + 29.0 ft = 48.0 ft <br /> N. Calculate Mound Length:Endslope Berm Width (4.L)+Bed Length (2.C)+Endslope Berm Width (4.L)=ft <br /> 15.0 ft + 63.0 ft + 15.0 ft = 93.0 ft <br /> Comments: <br />