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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 (2.6)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 + 27 = 23.3 yd3 <br /> Add 20%for constructability: 23.33 = <br /> yd 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 /> 1.5 0.0 1.5 ft X 10.0 ft X 63.0 ft = 955.5 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 /> ft -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.O ft X 63.0 ).2= 204.8 ft3 <br /> Downslope Volume:((Downslope Height-1)x Downslope Absorption Width x Media Length)+2=cubic feet <br /> (( 3.9 ft-1) X 10.0 ft x 63.0 )-2= 903.0 ft3 <br /> Endslope Volume:(Downslope Mound Height-1)x 3 x Media Width =cubic feet <br /> ( 3.9 ft-1 ) X 3.0 ft X 10.0 ft = 86.0 ft3 <br /> Total Clean Sand Volume:Upslope Volume +Downslope Volume +Endslope Volume +Volume Under Media <br /> 204.8 ft3 + 903.0 ft3 + 86.0 ft3 + 955.5 ft3= 2149.3 ft3 <br /> Divide ft3 by 27 ft3/yd3 to calculate cubic yards: 2149.3 ft3 + 27 = 79.6 yd3 <br /> Add 20%for constructability: 79.6 yd3 X 1.2 = 95.5 yd3 <br /> C. Calculate Sandy Berm Volume: 3.5 0.0 <br /> Total Berm Volume(approx):((Avg.Mound Height-.5 ft topsoil)x Mound Width x Mound Length)+2=cu.ft. <br /> ( 3.5 _ 0.5 )ft x 41.4 ft X 86.2 ).2= 5380.0 ft3 <br /> Total Mound Volume-Clean Sand volume-Rock Volume=cubic feet <br /> 5380.0 ft3 - 2149.3 ft3 - 630.0 ft3 = 2600.7 ft3 <br /> Divide ft3 by 27 ft3/yd3 to calculate cubic yards: 2600.7 ft3 + 27 = 96.3 yd3 <br /> Add 20%for constructability: 96.3 yd3 x 1.2 = 115.63 <br /> yd <br /> D.Calculate Topsoil Material Volume:Total Mound Width X Total Mound Length X.5 ft <br /> 41.4 ft X 86.2 ft X 0.5 ft = 1783.4 ft3 <br /> Divide ft3 by 27 ft3/yd3 to calculate cubic yards: 1783.4 ft3 + 27 = 66.1 yd3 <br /> Add 20%for constructability: 66.1 yd3 x 1.2 = 79.33 <br /> yd <br />