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7. APPROXIMATE MOUND MATERIAL CALCULATIONS: A. Calculate Bed (rock) Volume: Bed Length (2.C)X Bed Width (2.6)X Depth = Votume (ft3) 38.0 ft X 10.0 ft X 1.0 = 380.0 ft3 Divide ft3 by 27 ft3/yd3 to calculate cubic yards: 380.0 ft3 : 27 = C 14.1 yd3 Add 20%for constructability: 14.1 yd3 X 1.2 = 16.9 yd3 B. Calculate Clean Sand Volume: Upslope Volume: ((Upslope Mound Height - 1)x 3 x Bed Length)=2 =cubic feet (( 3.0 ft - 1) X 3.0 ft X 38.0 )=2= 114.0 ft3 Downs(ope Voiume: ((Downslope Height- 1) x Downslope Absorption Width x Media Length) �2 =cubic feet (( 4.2 ft- 1) X 10.0 ft X 38.0 )=2= 608.0 ft3 Endslope Vofume: (Downslope Mound Height- 1) x 3 x Media Width =cubic feet ( 4.2 ft- 1 ) X 3.0 ft X 10.0 ft = 96.0 ft3 Votume Under Rockbed: Average Sand Depth x Media Width x Media Length =cubic feet 1.6 ft X 10.0 ft X 38.0 ft = 608.0 ft3 Totat Clean Sand Volume: Upslope Volume +poNrnslope Volume +Ends(ope Volume + Volume Under Medio 114.0 ft3 + 608.0 ft3 + 96.0 ft3 + 608.0 ft3- 1426.0 ft3 Divide ft3 by 27 ft3Jyd3 to calculate cubic yards: 1426.0 ft3 : 27 = 52,g yd3 Add 20%for constructabitity: 52.8 yd3 X 1.2 = 63.4 yd3 C. Calculate Sandy Berm Vo(ume: Total Berm Volume(approx): ((Avg. Mound Height- .5 ft topsoil)x Mound Width x Mound Length) =2 =cu. ft. ( 3.6 _ 0.5 )ft X 39.0 ft X 62.0 )=2= 3747.9 ft3 Total Mound Vo(ume- Ctean Sand volume-Rock Volume=cubic feet 3747.9 ft3 _ 1426.0 ft3 _ 380.0 ft3 = 1941.9 ft3 Divide ft3 by 27 ft3/yd3 to calculate cubic yards: 1941.9 ft3 : 27 = 71.9 yd3 Add 20%for constructability: 71.9 yd3 x 1.2 = 86.3 yd3 D. Calculate Topsoii Moterio! Volume: Total Mound Width X Tota!Mound Length X.5 ft 39.0 ft X 62.0 ft X 0.5 ft = 1209.0 ft3 Divide ft3 by 27 ft3/yd3 to catculate cubic yards: 1209.0 ft3 : 27 = 44.8 yd3 Add 20%for constructability: 44.8 yd3 X 1.2 = 53.7 yd3 I hereby certify that I have completed this work in accordance with all appiicable ordinances, rules and laws. Joseph J Olson J 810 8/t0/09 (Designer) (Signature) (License#) (Date)