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WCS Properties LLC May 17,2023 <br /> Drainage Memo Page 4 of 4 <br /> Rational Method-Developed Conditions <br /> for: WCS Properties LLC Frontage Pipes <br /> n= 0.013 <br /> Conveyance Capacity <br /> 4-inch I 6-inch 8-inch 10-inch 12-inch <br /> Slope(f/ft) <br /> 0.005 0.131 0.40 0.87 1.55 2.52 <br /> 0.010 0.19 0.56 1.23 2.20 3.57 <br /> 0.015 0.23 0.69 1.50 2.69 4.37 <br /> 0.020 0.27 0.79 1.74 3.11 5.05 <br /> 0.025 0.30 0.89 1.94 3.47 5.65 <br /> 0.030 0.33 0.97 2.13 3.81 6.18 <br /> 0.035 0.36 1.05 2.30 4.11 6.68 <br /> 0.0401 0.38 1.12 2.46 4.39 7.14 <br /> 0.045 0.40 1.19 2.60 4.66 7.57 <br /> 0.050 0.43 1.26 2.75 4.91 7.98 <br /> 0.055 0.45 1.32 2.88 5.15 8.37 <br /> 0.060 0.47 1.38 3.01 5.38 8.75 <br /> 0.065 0.49 1.43 3.13 5.60 9.10 <br /> 0.070 0.50 1.49 3.25 5.81 9.45 <br /> 0.075 0.52 1.54 3.36 6.02 9.78 <br /> 0.080 0.54 1.59 3.47 6.21 10.10 <br /> 0.085 0.56 1.64 3.58 6.40 10.41 <br /> 0.090 0.57 1.68 3.68 6.59 10.71 <br /> 0.095 0.59 1.73 3.78 6.77 11.01 <br /> 0.100 0.60 1.78 3.88 6.95 11.29 <br /> Rational Method By BJL Date 5/17/2023 <br /> ENGINEERING Developed Conditions cnka JpU Date 5/17/2023 <br /> 250 4th Ave. South Seale N.T.S. Sheet No. <br /> Suite 200 Job No. 11 <br /> Edmonds,WA 98020 WCS Properties LLC 20011.20 <br /> Figure A-2:Manning's Equation Conveyance Capacity <br /> 250 4th Avenue South,Suite 200 <br /> Edmonds,WA 98020 <br /> ENGINEERING ph.425.778.8500 I f.425.778.5536 <br /> www.cgengineering.com <br />