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8 <br /> Hydrograph Report <br /> Hydraflow Hydrographs Extension for Autodesk®Civil 3D®by Autodesk,Inc.v2022 Thursday, 10/10/2024 <br /> Hyd. No. 4 <br /> Drainage Basin 2 - Mining <br /> Hydrograph type = Rational Peak discharge = 37.84 cfs <br /> Storm frequency = 100 yrs Time to peak = 362 min <br /> Time interval = 1 min Hyd. volume = 821,963 cuft <br /> Drainage area = 120.000 ac Runoff coeff. = 0.4* <br /> Intensity = 0.788 in/hr Tc by TR55 = 362.00 min <br /> IDF Curve = Evans.IDF Asc/Rec limb fact = 1/1 <br /> *Composite(Area/C)=[(77.900 x 0.50)+(42.100 x 0.22)]/120.000 <br /> Drainage Basin 2 - Mining <br /> Q (cfs) Hyd. No. 4-- 100 Year Q (cfs) <br /> 40.00 40.00 <br /> 30.00 30.00 <br /> 20.00 20.00 <br /> 10.00 10.00 <br /> 0.00 - 0.00 <br /> 0 60 120 180 240 300 360 420 480 540 600 660 720 780 <br /> Hyd No. 4 Time(min) <br />