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� <br /> 7. APPROXIMATE MOUND MATERIAL CALCULATIONS: <br /> , A. Calculate Bed (rock) Volume: Bed Length (2.C)X Bed Width (2.6)X Depth = Volume (ft3) <br /> 50.0 ft X 10.0 ft X 1.0 = 500.0 ft3 <br /> � Divide ft3 by 27 ft'/yd'to calculate cubic yards: <br /> 500.0 ft3 = 27 = 18.5 yd' <br /> � Add 20%for constructability: 18.5 yd3 X 1.2 = 22•2 yd3 <br /> B. Calculate Clean Sand Volume: <br /> � Upslope Volume: ((Ups(ope Mound Height - 1)x 3 x Bed Length) =2 =cubic feet <br /> (( 3.0 ft - 1) X 3.0 ft X 50.0 )=2 = 150.0 ft3 <br /> Downslope Vo(ume: ((Downslope Height- 1) x Downslope Absorption Width x Media Length)T 2=cubic feet <br /> � (( 3.5 ft - 1) X 16.7 ft X 50.0 )+2= 1041.7 ft3 <br /> Ends(ope Volume: (Downs(ope Mound Height - 1) x 3 x Media Width =cubic feet <br /> � ( 3.5 ft - 1 ) X 3.0 ft X 10.0 ft = 75.0 ft3 <br /> Volume Under Rockbed: Average Sand Depth x Media Width x Media Length = cubic feet <br /> � 1.3 ft X 10.0 ft X 50.0 ft = 625.0 ft3 <br /> Total C(ean Sand Volume: Upslope Volume + Downslope Volume + Endslope Volume + Vo(ume Under Media <br /> � 150.0 ft3 + 1041.7 ft3 + 75.0 ft3 + 625.0 ft3= 1891.7 ft3 <br /> Drvide ft3 by 27 ft3/yd3 to calculate cubic yards: 1891•� ft3 : 27 = ��•� yd3 <br /> � Add 20%for constructability: 70.1 yd3 X 1.2 = 84•1 yd3 <br /> C. Calculate Sandy Berm Vo(ume: <br /> Total Berm Volume(approx): ((Avg. Mound Height - .5 ft topsoil)x Mound Width x Mound Length) =2=cu. ft. <br /> � ( 3.3 _ 0.5 )ft X 40.7 ft X 78.0 )=2 = 4360.4 ft3 <br /> Total Mound Vo(ume- C(ean Sand volume-Rock Vo(ume= cubic feet <br /> � 4360.4 ft3 - 1891.7 ft3 - 500.0 ft; = 1968.8 ft3 <br /> Divide ft3 by 27 ft'/yd3 to calculate cubic yards: 196$•8 ft3 : 27 = �2•9 yd3 <br /> � Add 20%for constructability: 72.9 yd3 x 1.2 = 87.5 yd3 <br /> D. Calculate Topsoil Materia!Vo(ume: Total Mound Width X Total Mound Length X.5 ft <br /> , 40.7 ft X 78.0 ft X 0.5 ft = 1585.6 ft' <br /> Divide ft' by 27 ft3/yd3 to calculate cubic yards: 1585.6 ft3 ; 27 = 58.7 yd' <br /> � Add 20%for constructability: 58.7 yd3 x 1.2 = 70•5 yd3 <br /> � I hereby certify that I have completed this w rk in r nce ith all applicable ordinances, rules and laws. <br /> I � , <br /> �' � 1� Il� lv <br /> , (Designer) ( na ur (License#) (Date) <br /> � <br /> ' <br />