Laserfiche WebLink
1070.13 Henderson Mine • <br /> Rational Method Runoff <br /> BASIN A-3 <br /> Job No: ..:. ..:..:...: ...::::. <br /> Client Cllthai;M619.W6ngii4?,Cti:.`:;;r: :,':`:; <br /> Location: Henne.rsoei:M.tie:;'. ";3::.":' <br /> Latitude: <br /> Longitude: <br /> Site Conditions <br /> Time of Concentration Length Velocity Time <br /> Total Area 3.04 Acres fit fps Min. <br /> Length along Drain it Overland Flow 60 1 1.00 <br /> + Fall along Drain It Overland Flow 290 2 2.42 <br /> Channel Flow 74 3 0.41 <br /> Channel Flow 255 2 2.13 <br /> 1 1 0.02 <br /> Total Tc 5.97 minutes <br /> Runoff Coefficients <br /> Area <br /> Acres Ce Product <br /> Impervious Area 0.44 0.85 0.374 <br /> Pervious Area 2.6 0.1 0.26 <br /> 3.04 0.634 <br /> Weighted Ce f:;:I2't:::::'::: <br /> Runoff Calculation <br /> Tc= 5.97 minutes <br /> Full Year NOAA Duration <br /> Return 6-Hr. Rainfall Cf Peak Volume <br /> Period Depth inthr Modifier unoff(cfs Acre-feet <br /> 2 1.10 2.62 1 1.66 0.O6 <br /> 5 1.40 3.68 1 2.33 0.07 <br /> 10 1.70 4.48 1 2.84 0.09 <br /> 25 2.00 5.53 1.1 3.86 0.12 <br /> 50 2.20 6.33 1.2 4.82 0.14 <br /> 100 2.40 7.13 1.25 5.65 0.16 <br /> Partial Duration May-Oct <br /> Return 6-Hr. Rainfall Cf Peak Volume <br /> Period Depth irdllr Modifier unoff(cfs Acre-feet <br /> 2 1.00 2.52 1 1.60 0.05 <br /> 5 1.40 3.47 1 2.20 0.07 <br /> 10 1.63 4.19 1 2.66 0.09 <br /> 25 1.94 5.14 1.1 3.59 0.11 <br /> 50 2.17 5.86 1.2 4.46 0.14 <br /> 100 2.00 6.58 1.25 5.21 0.13 <br /> Figure 2e <br /> W.W.Wheeler and Assoc., Inc. <br /> Runoff 3125199 <br />