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Rustys_Pre-Construction - Copy Type II 24-hr 10-yr Rainfall=3.14" 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 [46] Hint: Tc=0 (Instant runoff peak depends on dt) Runoff = 1.39 cfs @ 11.89 hrs, Volume= 2,309 cf, Depth> 1.58" Routed to Link AP2 : BASIN 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 10-yr Rainfall=3.14" Area (sf) CN Description 9,291 73 Brush, Good, HSG D 4,967 98 Paved parking, HSG D 3,277 98 Unconnected pavement, HSG D 17,535 85 Weighted Average 9,291 52.99% Pervious Area 8,243 47.01% Impervious Area 3,277 39.75% Unconnected Subcatchment 2: Subcat 2 Hydrograph Runoff 1.39 cfs Type II 24-hr 10-yr Rainfall=3.14" Runoff Area=17,535 sf 1 Runoff Volume=2,309 cf Flow (cfs) Runoff Depth>1.58" Tc=0.0 min CN=85 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Page 59 of 84