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45 <br /> Hydrograph Return Period - llydrraaav ydrographs Extension forAutoCAD®Civil 3D®2011 by Autodesk,Inc.v8 <br /> Hyd. Hydrograph Inflow Peak Outflow(cfs) Hydrograph <br /> No. type hyd(s) Description <br /> (origin) 1-yr 2-yr 3-yr 5-yr 10-yr 25-yr 50-yr 100-yr <br /> 1 SCS Runoff 8.249 18.64 64.20 Pre-Dev Site <br /> 2 SCS Runoff 108.57 151.52 288.79 Remaining Basin <br /> 3 Combine 1,2 116.81 169.99 351.17 Outfall-Pre <br /> 10 SCS Runoff 15.37 28.92 81.26 Post-Dev Site <br /> 11 SCS Runoff 108.57 151.52 288.79 Remaining Basin <br /> 12 Combine 10, 11 123.72 179.94 367.20 Outfall-Post <br /> Proj. file: Preliminary Drainage Calcs.gpw Friday, Aug 31, 2012 <br />