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7. APPROXIMATE MOUND MATERIAL CALCULATIONS: A. Calculate Bed (rock) Volum : Bed Length (2-C)X Bed Width (2.6)X Depth =Volume (ft3) 37.5 ft X 10.0 ft X 1.0 - 375.0 ft3 Divide ft?by 27 f3/yd3 to calculate cubic yards: 375.0 ft3 + 27 = 1 13.9 yd3 Add 20%for constructability: 13.9 yd3 X 1.2 = 16.7 yd3 B. Calculate Clean Sand Volume: Upslope Volume: ((Upstope Mound Height - 1)x 3 x Bed Length)+2=cubic feet (( 32 ft -1) X 3.O ft X 37.5 )+2= 121,9 ft3 Downslope Volume: ((Downslope Height- 1) x Downslope Absorption Width x Media Length)+2=cubic feet (( 4 0 ft-1) X 10`.0 ft X 37.5 )+2= 556.3 ft? Endstope Volume: (Downslope Mound Height- 1) x 3 x Media Width =cubic feet { 4.0 ft-1 ) X 3.0 ft X 10.0 ft = 89.0 ft3 Volume Under Rockbed:Average Sand Depth x Media Width x Media Length =cubic feet 1.6 ft X 10;0 ft X 3T.5 ft = 581.5 ft3 Total Clean Sand Volume:Upslope Volume +Downslope Volume +Endslope Volume +Volume Under Media 1211.9 ft? + 556.3 ft? + 89.0 ft3 + 587.5 lw= 1354.6 ft3 Divide ft3 by 27 ft3/yd3 to calculate cubic yards: 1354.6 ft? + 27 50.2 yd3 Add 20%for constructability. 50.2 yd3 X 1.2 = 60.2 yd3 C. Calculate Sandy Berm Volume: Total Berm Volume(approx): ((Avg.Mound Height-.5 ft topsoil)x Mound Width x Mound Length)+2=cu.ft. 0.5 )ft X #ZO ft X 61;5 )+2= 3960.6 ft? Total Mound Volume- Clean Sand volume-Rock Volume=cubic feet 3960.6 ft? - 1354.6 ft? - 375.0 fe = 2231.O�ft3 Divide ft?by 27 ft?/V&to calculate cubic yards. 2231.0 1 ft3 + 27 = $2.6 y& Add 20%for constructability: 8Z6 yd3 x 1.2 = 99.2 yd3 D. Calculate Topsoil Material Volume: Total Mound Width X Total Mound Length X.5 ft 42.0 ft X 61.3 ft X 0.5 ft 1291.5 ft3 Divide ft?by 27 ft?/y&to calculate cubic yards: 1291.5 1 ft3 + 27 = 47.8 yds Add 20%for constructabitity: 47.8 yd3 x 1.2 = 57.4 yd3 I hereby certify that 1 have compiolad this work in accordance with all applicable ordinances,rules and laws. Joseph J Olson 810 6/25/09 (Designer) (Signature) (License#) (Date)