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2 <br /> Hydrograph Report <br /> Hydraflow Hydrographs Extension for Autodesk®Civil 3138 by Autodesk,Inc.v2023 Friday, 11/11 /2022 <br /> Hyd. No. 1 <br /> Basin 1 - Premine <br /> Hydrograph type = SCS Runoff Peak discharge = 30.60 cfs <br /> Storm frequency = 100 yrs Time to peak = 735 min <br /> Time interval = 15 min Hyd. volume = 4.252 acft <br /> Drainage area = 78.400 ac Curve number = 74 <br /> Basin Slope = 0.0 % Hydraulic length = 0 ft <br /> Tc method = TR55 Time of conc. (Tc) = 39.20 min <br /> Total precip. = 2.65 in Distribution = Type II <br /> Storm duration = 24 hrs Shape factor = 484 <br /> Basin 1 - Premine <br /> Q (cfs) Hyd. No. 1 -- 100 Year Q (cfs) <br /> 35.00 35.00 <br /> 30.00 30.00 <br /> 25.00 25.00 <br /> 20.00 20.00 <br /> 15.00 15.00 <br /> 10.00 10.00 <br /> 5.00 5.00 <br /> 0.00 0.00 <br /> 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 <br /> Hyd No. 1 Time(min) <br />