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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 9 Summary for Subcatchment 2: Subcat 2 Runoff = 1.32 cfs @ 11.97 hrs, Volume= 2,586 cf, Depth> 1.91" Routed to Pond 6P : INFIL. BED 5 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 10,593 73 Brush, Good, HSG D 2,424 98 Paved parking, HSG D 3,239 98 Unconnected pavement, HSG D 16,257 82 Weighted Average 10,593 65.16% Pervious Area 5,663 34.84% Impervious Area 3,239 57.20% Unconnected Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 2: Subcat 2 Hydrograph Runoff 1.32 cfs Type II 24-hr 25-yr Rainfall=3.84" 1 Runoff Area=16,257 sf Runoff Volume=2,586 cf Flow (cfs) Runoff Depth>1.91" Tc=6.0 min CN=82 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Page 70 of 84