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• TABLE 3.9 - 5 Culvert Removal and Stream Channel Reconstruction <br />MUNGER ROAD 42 INCH CULVERT <br />Design the channel to pass the flow from a lOYR 24HR event <br />The calculations of flow for Q10 are from Appendix M() <br />Given; Event • 10 year 24 hour Q10 = 52.9 cfs <br />Slope of ditch = 2.00% <br />Soil type = Alluvial Silt Noncolloidal <br />Maximum Velocity (fps) = 5 <br />Ditch Dimensions: Shape = Trapezoidal <br />Depth = d = 1.14 feet <br />Base = b = 4 feet <br />Side Slopes = z = 5.00 <br />Manning No. = n = 0.035 <br />Area of flow = A = bd +zd2 = 11.058 <br />L~ <br />Hyd. Radius = R = bd +zd2 / b + 2d(z2 + 1)0.5 <br />R = 0.7077 <br />Velocity of flow = V = 1.49/n * R0.667 * S0.5 <br />V = 4.78105 <br />Quantity of Flow = Q = A * V <br />Q = 52.8688 <br />z=5h;1V <br />OVERALL CHANNEL DEPTH WILL BE 5 FEET TO CREATE FORD <br />I~ <br />MU VOL 1 <br />PAGE - 2 <br />11.30.96 <br />