Prepared by Professional Design Services HydroCAD® 10.20-6a s/n 02223 © 2024 HydroCAD Software Solutions LLC Printed 12/31/2025 Page 10 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=Delmarva, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment1S: POROUS Flow Length=430' Tc=19.1 min CN=47 Runoff=0.40 cfs 0.092 af Subcatchment2S: IMPERVIOUS Flow Length=280' Tc=2.6 min CN=97 Runoff=2.28 cfs 0.172 af Reach 3R: COMPOSITE Total Runoff Area = 2.420 ac Runoff Volume = 0.264 af Average Runoff Depth = 1.31' 87.60% Pervious = 2.120 ac 12.40% Impervious = 0.300 ac