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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 /> 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 �,2 = Zg,p yd3 <br /> B. Calculate C(ean Sand Votume: <br /> Upslope Vo(ume: ((Upslope Mound Height - i)x 3 x Bed Length) �-2 =cubic feet <br /> (( 3.3 ft - 1) X 3.0 ft X 63.0 )=2 = 220.5 ft3 <br /> Downslope Vo(ume: ((Downs(ope Height- 1) x Downslope Absorption Width x Media Length) =2 =cubic feet <br /> (( 4.8 ft - 1) X 10.0 ft X 63.0 }=2 = 1207.5 ft3 <br /> Endslope Vo(ume: (Downslope Mound Height- 1) x 3 x Media Width =cubic feet <br /> ( 4.8 ft- 1 ) X 3.0 ft X 10.0 ft = 115.0 ft3 <br /> Volume Under Rockbed: Average Sand Depth x Media Width x Media Length =cubic feet <br /> 2.1 ft X 10.0 ft X 63.0 ft = 1312.5 ft3 <br /> Total Clean Sand Volume: Upslope Volume +po�ynslope Vo(ume +Ends(ope Votume + Volume Under Media <br /> 220.5 ft3 + 1207.5� ft3 + 115.0 ft3 + 1312.5 pt3= 2855.5 ft3 <br /> Divide ft3 by 27 ft3/yd3 to calculate cubic yards: 2855.5 ft3 : Z7 = �p5,g yd3 <br /> Add 20%for constructability_ 105.8 yd3 X �.2 = �26,g 3 <br /> yd <br /> C. Calculate Sandy Berm Volume: <br /> Tota(Berm Volume(opprox): ((Avg.Mound Height- .5 ft topsoil)x Mound Width x Mound Length) +2 =cu. ft. <br /> ( 4.1 _ 0.5 )ft X 45.0 ft X 93.0 )=2= 7498.1 ft3 <br /> Total Mound Votume- C(eon Sand volume-Rock Volume=cubic feet <br /> 7498.1 ft3 _ 2855.5 ft3 _ 630.0 ft3 - 4012.6 ft3 <br /> Divide ft3 by 27 ft3/yd3 to calculate cubic yards: 4012.6 ft3 : 27 = 148.6 yd3 <br /> Add 20%for constructability: 148.6 yd3 X �.2 - �7g,3 yd3 <br /> D. Catculate Topsoil Materia( Volume: Totat Mound Width X Total Mound Length X.5 ft <br /> 45.0 ft X 93.0 ft X 0.5 ft = 2092.5 ft3 <br /> Divide ft3 by 27 ft3/yd3 to calculate cubic yards: 2092.5 ft3 : 27 = 77,5 yd3 <br /> Add 20%for constructability: 77.5 yd3 x 1.2 = 93.0 yd3 <br /> I hereby certify that I have completed this work in accordance with all appiicable ordinances, rules and laws. <br /> :, <br /> ,. <br /> Joseph J Olson „/i`------W�� 810 10/15/09 <br /> (Designer) , �' (Signature) (License#) (Date) <br />