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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 12 Summary for Subcatchment 5: Subcat 5 [46] Hint: Tc=0 (Instant runoff peak depends on dt) Runoff = 0.22 cfs @ 11.89 hrs, Volume= 366 cf, Depth> 1.76" 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 1,773 73 Brush, Good, HSG D 721 98 Paved parking, HSG D 2,495 80 Weighted Average 1,773 71.08% Pervious Area 721 28.92% Impervious Area Subcatchment 5: Subcat 5 Hydrograph 0.25 Runoff 0.24 0.22 cfs 0.23 0.22 0.21 Type II 24-hr 0.2 0.19 25-yr Rainfall=3.84" 0.18 0.17 Runoff Area=2,495 sf 0.16 0.15 Runoff Volume=366 cf Flow (cfs) 0.14 0.13 0.12 Runoff Depth>1.76" 0.11 0.1 0.09 Tc=0.0 min 0.08 0.07 CN=80 0.06 0.05 0.04 0.03 0.02 0.01 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Page 73 of 84