complete drainage report rev 9

POA-2 2024-05-12 HydroCad - Proposed POA 2B-1 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 157 Summary for Subcatchment 53S: Basin 9 - Imp Runoff = 1.87 cfs @ 12.14 hrs, Volume= Routed to Pond 42P : Basin 9 7,250 cf, Depth= 4.98" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-80.00 hrs, dt= 0.04 hrs NOAA 24-hr D 10-Year Rainfall=5.22" * * * Area (sf) 13,382 2,932 1,147 17,461 17,461 CN 98 98 98 98 Description vehicle surface area other impervious roofs Weighted Average 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.2 100 0.1000 0.23 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" 0.2 40 0.0750 4.41 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps 7.4 140 Total Sheet Flow (A-B) Subcatchment 53S: Basin 9 - Imp SCF (B-C)