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OSTP Mound Materials Worksheet UNIVERSITY <br /> Minnesota Pollution OF MINNESOTA �, <br /> Control Agency <br /> A.Calculate Bed (rock)Volume:Bed Length (2.C)X Bed Width (2.B)X Depth =Volume (ft3) v 11.05.31 <br /> 63.0 ft X 10.0 ft X 1.0 = 630.0 ft3 <br /> Divide ft3 by 27 ft3/yd3 to calculate cubic yards: <br /> 630.0 ft3 t 27 = 23.3 yd3 <br /> Add 20%for constructability: 23.3 yd3 X 1.2 = 28.0 yd3 <br /> B. Calculate Clean Sand Volume: <br /> Volume Under Rock bed:Average Sand Depth x Media Width x Media Length =cubic feet <br /> 1.4 0.0 1.4 ft X 10.0 ft X 63.0 ft = 861.0 ft3 <br /> For a Mound on a slope from 0-1% <br /> Volume from Length=((Upslope Mound Height-1)X Absorption Width Beyond Bed X Media Bed Length) <br /> ft -1) X X ft = <br /> Volume from Width=((Upslope Mound Height-1)X Absorption Width Beyond Bed X Media Bed Width) <br /> Ift -1) X X ft = <br /> Total Clean Sand Volume:Volume from Length+Volume from Width+Volume Under Media <br /> ft3 + ft3 + ft3 = ft3 <br /> For a Mound on a slope greater than 1% <br /> Upslope Volume:((Upslope Mound Height -1)x 3 x Bed Length)+2=cubic feet <br /> (( 3.2 ft -1) X 3.Oft X 63.0 )+2= 204.8 ft3 <br /> Downslope Volume:((Downslope Height-1)x Downslope Absorption Width x Media Length)+2=cubic feet <br /> (( 3.6 ft-1) X 10.0 ft X 63.0 )4-2= 808.5 ft3 <br /> Endslope Volume:(Downslope Mound Height-1) x 3 x Media Width =cubic feet <br /> ( 3.6 ft-1 ) X 3.0 ft X 10.0 ft = 77.0 ft3 <br /> Total Clean Sand Volume:Upslope Volume +Downslope Volume+Endslope Volume +Volume Under Media <br /> 204.8 ft3 + 808.5 ft3 + 77.0 ft3 + 861.0 ft3= 1951.3 ft3 <br /> Divide ft3 by 27 ft3/yd3 to calculate cubic yards: 1951.3 ft3 a 27 = 72.3 yd3 <br /> Add 20%for constructability: 72.3 yd3 X 1.2 = 86.7 yd3 <br /> C. Calculate Sandy Berm Volume: 3.4 0.0 <br /> Total Berm Volume(approx):((Avg.Mound Height-.5 ft topsoil)x Mound Width x Mound Length)+2=cu.ft. <br /> ( 3.4 - 0.5 )ft X 37.2 ft X 84.4 )*2= 4500.9 ft3 <br /> Total Mound Volume-Clean Sand volume-Rock Volume=cubic feet <br /> 4500.9 ft3 - 1951.3 ft3 - 630.0 ft3 = 1919.6 ft3 <br /> Divide ft3 by 27 ft3/yd3 to calculate cubic yards: 1919.6 ft3 = 27 = 71.1 yd3 <br /> Add 20%for constructability: 71.1 yd3 x 1.2 = 85.3 yd3 <br /> D. Calculate Topsoil Material Volume:Total Mound Width X Total Mound Length X.5 ft <br /> 37.2 ft X 84.4 ft X 0.5 ft = 1570.1 ft3 <br /> Divide ft3 by 27 ft3/yd3 to calculate cubic yards: 1570.1 ft3 s 27 = 58.2 yd3 <br /> Add 20%for constructability: 58.2 yd3 x 1.2 = 69.8 yd3 <br />