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Rustys_Post-Construction - Copy Type II 24-hr 25-yr Rainfall=3.84" Prepared by Waves AE Printed 7/29/2026 HydroCAD® 10.20-7a s/n 13900 © 2025 HydroCAD Software Solutions LLC Page 10 Summary for Subcatchment 3: Subcat 3 Runoff = 0.08 cfs @ 11.96 hrs, Volume= 175 cf, Depth> 3.32" Routed to Pond 5P : INFIL. BED Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 25-yr Rainfall=3.84" Area (sf) CN Description 4 73 Brush, Good, HSG D 627 98 Paved parking, HSG D 630 98 Weighted Average 4 0.61% Pervious Area 627 99.39% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 3: Subcat 3 Hydrograph 0.085 Runoff 0.08 0.08 cfs 0.075 Type II 24-hr 0.07 0.065 25-yr Rainfall=3.84" 0.06 0.055 Runoff Area=630 sf 0.05 Runoff Volume=175 cf Flow (cfs) 0.045 0.04 Runoff Depth>3.32" 0.035 Tc=6.0 min 0.03 0.025 CN=98 0.02 0.015 0.01 0.005 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Page 71 of 84