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OSTP Mound Materials Worksheet UNIVERSITY <br /> Minnesota Pollution OF MINNESOTA "- <br /> Control Agency �� <br /> Project ID: v 11.09.22 <br /> A. Calculate Bed (rock)Volume:Bed Length (2.C)X Bed Width (2.B)X Depth =Volume (ft3) <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: 23.3 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 /> 1.6 ft X 10.0 ft X 63.0 ft = 987.0 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 3.0 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 /> (( 4.0 ft-1) X 10.0 ft X 63.0 )-2= 934.5 ft3 <br /> Endslope Volume:(Downslope Mound Height- 1) x 3 x Media Width =cubic feet <br /> ( 4.0 ft-1 ) X 3.0 ft X 10.0 ft = 89.0 ft3 <br /> Total Clean Sand Volume:Upslope Volume +Downslope Volume +Endslope Volume +Volume Under Media <br /> 204.8 ft3 + 934.5 ft3 + 89.0 ft3 + 987.0 ft3= 2215.3 ft3 <br /> Divide ft3 by 27 ft3/yd3 to calculate cubic yards: 2215.3 ft3 = 27 = 82.0 yd3 <br /> Add 20%for constructability: 82.0 yd3 X 1.2 = 98.5 yd3 <br /> C. Calculate Sandy Berm Volume: <br /> Total Berm Volume(approx):((Avg.Mound Height-0.5 ft topsoil)x Mound Width x Mound Length)_2=cubic feet <br /> ( 3.6 - 0.5 )ft x 43.0 ft X 87.0 P-2= 5736.2 ft3 <br /> Total Mound Volume-Clean Sand volume-Rock Volume=cubic feet <br /> 5736.2 ft3 - 2215.3 ft3 - 630.0 ft3 = 2891.0 ft3 <br /> Divide ft3 by 27 ft3/yd3 to calculate cubic yards: 2891.0 ft3 : 27 = 107.1 yd3 <br /> ' <br /> Add 20%for constructability: 107.1 yd3 x 1.2 = 128.5 yd3 <br /> D. Calculate Topsoil Material Volume:Total Mound Width X Total Mound Length X.5 ft <br /> 43.0 ft X 87.0 ft X 0.5 ft = 1870.5 ft3 <br /> Divide ft3 by 27 ft3/yd3 to calculate cubic yards: 1870.5 ft3 : 27 = 69.3 yd3 <br /> Add 20%for constructability: 69.3 yd3 x 1.2 = 83.1 yd3 <br />