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o u„ F I, <br />Sen :..L <br />7 <br />T&ii arras Nr1111illi;� <br />P.ro�.Rwa <br />�\. <br />Mound Materials Worksheet MINNESOTA POLLUTION <br />m CONTROL AGENCY <br />rrojec[iu: v 04.01.2020 <br />A. Rock Volume: (Rock Below Pipe + Rock to cover pipe (pipe outside dia + -2 inch)) X Bed Length X Bed Width = Volume <br />( 6 in + in ) _ 12 X 1 62.5 Ift X 1 10.0 ft = 1 312.5 ft3 <br />Divide ft3 by 27 ft3 /yd 3 to calculate cubic yards: 312.5 ft' : 27 = 1 11.6 yd' <br />Add 30% for constructability: 11.6 yd X 1.3 = 15.0 yd' <br />B. Calculate Clean Sand Volume: <br />Volume Under Rock bed: Average Sand Depth x Media Width x Media Length = cubic feet <br />2.0 ft X L 10.0 ft X 1 62.5 ft = 1218.8 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 I ft = <br />Volume from Width = ((Upslope Mound Height - 1) X Absorption Width Beyond Bed X Media Bed Width) <br />ft - 1) X I X ft = <br />Total Clean Sand Volume: Volume from Length + Volume from Width + Volume Under Media <br />ft3 + F ft3 + I 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 />((1 3.8 ft - 1) X 3.0 ft X 1 62.5 ) + 2 = 262.5 ft' <br />Downslope Volume: ((Downslope Height - 1) x Downslope Absorption Width x Media Length) + 2 = cubic feet <br />((1 4.1 ft - 1) X 1 10.0 Ift X 1 62.5 J)+ 2 =1 968.8 ft3 <br />Endslope Volume: (Downslope Mound Height - 1) x 3 x Media Width = cubic feet <br />(1 4.1 ft - 1 ) X 3.0 ft X 1 10.0 ft = 93.0 ft3 <br />Total Clean Sand Volume: Upslope Volume + Downslope Volume + Endslope Volume + Volume Under Media <br />262.5 ft3 + 968.8 1 ft3 + 1 93.0 1 ft3 + I 1218.8 ft3 = 1 2543.0 ft' <br />Divide ft3 by 27 ft3/yd3 to calculate cubic yards: 2543.0 ft327 = 94.2 yd3 <br />Add 30% for constructability: 94.2 yd' X 1.3 = 122.4 yd' <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 <br />(1 4.0 1 - 0.5 )ft X 1 34.5 7 ft X 87.1 ) + 2 =F 5176.0 jft3 <br />Total Mound Volume - Clean Sand volume -Rock Volume = cubic feet <br />5176.0 ft3 - 2543.0 ft' - 312.5 ft3 =1 2320.5 Ift3 <br />Divide ft3 by 27 ft3 /yd 3 to calculate cubic yards: 1 2320.5 ft3 = 27 = 85.9 yd' <br />Add 30% for constructability: 1 85.9 yd x 1.3 = 111.7 yd3 <br />D. Calculate Topsoil Material Volume: Total Mound Width X Total Mound Length X .5 ft <br />34.5 ft X 87.1 ft X 0.5 ft = 1500.3 ft3 <br />Divide ft3 by 27 ft3 /yd 3 to calculate cubic yards: 1500.3 ft3 27 = 55.6 yd3 <br />Add 30% for constructability: 55.6 j yd x 1.3 = 72.2 yd3 <br />