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1 <br /> Hydrograph Report <br /> Hydraflow Hydrographs Extension for Autodesk®Civil 3D®by Autodesk, Inc.v2024 Friday,01 /17/2025 <br /> Hyd. No. 1 <br /> Basin 1 - Premine <br /> Hydrograph type = Rational Peak discharge = 125.19 cfs <br /> Storm frequency = 10 yrs Time to peak = 16 min <br /> Time interval = 1 min Hyd. volume = 2.759 acft <br /> Drainage area = 238.700 ac Runoff coeff. = 0.2 <br /> Intensity = 2.622 in/hr Tc by TR55 = 16.00 min <br /> IDF Curve = Hayden.IDF Asc/Rec limb fact = 1/1 <br /> Basin 1 - Premine <br /> Q (cfs) Hyd. No. 1 -- 10 Year Q (cfs) <br /> 140.00 140.00 <br /> 120.00 120.00 <br /> 100.00 - 100.00 <br /> 80.00 80.00 <br /> 60.00 60.00 <br /> 40.00 40.00 <br /> 20.00 20.00 <br /> 0.00 0.00 <br /> 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 <br /> Hyd No. 1 Time (min) <br />