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OSTP Mound Materials Worksheet UNIVERSITY <br /> Minnesota Pollution OF MINNESOTA <br /> Control Agency <br /> Project ID: v 03.19.15 <br /> A. Calculate Bed (rock)Volume:Bed Length J2.Q X Bed Width 2.8►X Depth =Volume ft' <br /> 50.0 ft X r 10.0 ft X 1.0 = 500.0 ft' <br /> Divide ft3 by 27 ft3/yd3 to calculate cubicyards: <br /> 500.0 j ft3 ; 27 = 18.5 yd3 <br /> Add 20%for constructability: 18.5 yd3 X 1.2 = 22.2 yd3 <br /> B. Calculate Clean Sand Volume: <br /> Volume Under Rock bed:Average Sand Depth x Media Width x Media len th =cubic feet <br /> 1.7 ft X 1 10.0 ft X 50.0 ft = 825.0 W <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 I I X I ft = <br /> Volume from Width=((Upslope Mound Height-1)X Absorption Width Beyond Bed X Media Bed Width) <br /> ft -1) X X I = <br /> Total Clean Sand Volume: Volume from Length-Volume from Width-Volume Under Media <br /> ft3 - ft3 . it, <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 /> (( 3.1 ft -1) X 3.0 ft X 50.0 )-2= 156.3 ft3 <br /> Downslope Volume:((Downslope Height- 1) x Downstope Absorption Width x Media Length)-2=cubic feet <br /> (( 3.8 ft-1) X 1 16.0 ft X 50.0 j )-2= 1113.3 ft3 <br /> Endslope Volume:(Downslope Mound Height- 1) x 3 x Media Width =cubic feet <br /> (1 3.8 ft-1 ) X 3.0 ft X 10.0 ft = 83.5 ft3 <br /> Total Clean Sand Volume:Upslope Volume -Downslope Volume +£ndslope Volume -Volume Under Media <br /> 156.3 ft3 - 1113.3 ft3 83.5 ft' - F 825.0 ft3= 2178.1 ft3 <br /> Divide ft''by 27 ft'/yd3 to calculate cubic yards: 2178.1 ft s 27 = 80•7 yd3 <br /> Add 20%for constructability: 80.7 yd3 x 1.2 96.8 yd3 <br /> C. Calculate Sandy Berm Volume: <br /> Total Berm Volume(approx):((Avg.Mound Height-0.5 ft topsoil)x Mound Width x Mound Le5th)-2=cubic feet <br /> ( 3.4 0.5 )ft X 41.0 ft X 74.0 )-2= 4453.7 ft3 <br /> Total Mound Volume-Clean Sand volume-Rock Volume=cubic feet <br /> 4453.7 ft3 2178.1 ft3 - 500.0 ft3 = 1775.6 ft3 <br /> Divide ft'by 27 ft3/yd3 to calculate cubic yards: 1775.6 f[' 27 = 65.8 yd3 <br /> Add 20%for constructability: 65.8 yd3 x 1.2 = 78.9 yd3 <br /> D.Calculate Topsoil Materia(Volume:Total Mound Width X Total Mound Length X.5 ft <br /> 41.0 ft X 74.0 ft X 0.5 ft = 1518.3 ft3 <br /> Divide ft'by 27 ft3/yd3 to calculate cubic yards: 1518.3 ft3 27 = 56.2 yd3 <br /> Add 20%for constructability: 56.2-7 yd3 x 1.2 = 67.5 yd3 <br />