Stormwater Management Report Feb 2026 resubmissionrcd 2 26 2026

2026-02 Proposed Conditions - AJH NOAA 24-hr D 2-Year-Current Rainfall=3.47", P2=3.47" Prepared by Dynamic Engineering Printed 2/16/2026 HydroCAD® 10.20-7a s/n 08640 © 2025 HydroCAD Software Solutions LLC Page 2 Summary for Subcatchment 3S: Proposed Roof Runoff = 0.52 cfs @ 12.10 hrs, Volume= 0.038 af, Depth= 3.24" Routed to Pond 1P : UG BASIN Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.001 hrs NOAA 24-hr D 2-Year-Current Rainfall=3.47", P2=3.47" Area (sf) CN Description 6,205 98 Roofs, HSG B 6,205 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.0 Direct Entry, Subcatchment 3S: Proposed Roof Hydrograph Runoff 0.55 0.52 cfs 0.5 NOAA 24-hr D 0.45 2-Year-Current Rainfall=3.47" P2=3.47" 0.4 Runoff Area=6,205 sf 0.35 Runoff Volume=0.038 af Flow (cfs) 0.3 Runoff Depth=3.24" 0.25 Tc=1.0 min

24" 0.25 Tc=1.0 min CN=98 0.2 0.15 0.1 0.05 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours)