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 41 Summary for Subcatchment 45S: Basin 11 - Imp Runoff = 3.89 cfs @ 12.17 hrs, Volume= Routed to Pond 33P : Basin 11 16,007 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) 22,270 32,203 5,428 59,901 59,901 CN 98 98 98 98 Description pavement surface area/ porous Roofs, HSG C other impervious Weighted Average 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.9 83 0.0400 0.15 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" Using McCuen-Spiess flow length 0.9 150 0.0330 2.92 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps 9.8 233 Total Sheet Flow (A-B) SCF (B-C) Subcatchment 45S: Basin 11 - Imp