complete drainage report rev 9

POA-2 2024-05-12 HydroCad - Proposed POA 2B-1 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 23 Summary for Subcatchment 29S: Basin 8 - Imp Runoff = 2.60 cfs @ 12.15 hrs, Volume= Routed to Pond 48P : Basin 8 10,223 cf, Depth= 3.21" 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 2-Year Rainfall=3.44" * * Area (sf) 8,924 11,475 17,858 38,257 38,257 CN 98 98 98 98 Description other impervious Roofs, HSG C pavement surface Weighted Average 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.3 100 0.0700 0.20 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" 0.3 65 0.0600 3.94 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps 8.6 165 Total Sheet Flow (A-B) Subcatchment 29S: Basin 8 - Imp SCF (B-C)