complete drainage report rev 9

POA-1 NOAA 24-hr D 100-Year Rainfall=8.66" 2024-05-12 HydroCad - Proposed POA 1B-1 Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 98 Summary for Subcatchment 17S: Basin 5 - Imp Runoff = 9.01 cfs @ 12.10 hrs, Volume= Routed to Pond 18P : Basin 5 30,289 cf, Depth= 8.42" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-Year Rainfall=8.66" * Area (sf) 26,232 14,605 2,331 43,168 43,168 CN 98 98 98 98 Description Roofs, HSG C Paved parking, HSG C impervious other than pavement Weighted Average 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.6 40 0.0200 1.19 Sheet Flow, Sheet Flow (A-B) Smooth surfaces n= 0.011 P2= 3.47" 1.2 182 2.50 Direct Entry, Pipe Flow (B-C) 1.8 222 Total Sheet Flow (A-B) Subcatchment 17S: Basin 5 - Imp Pipe Flow (B-C)