240916_40 ERW Stormwater Report FULL

NOAA 24-hr D 2-Year Rainfall=3.44"240913_40 ERW Waymaker Proposed Printed 9/16/2024Prepared by Colliers Engineering & Design Page 18HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR 1A-P: Runoff = 0.57 cfs @ 12.19 hrs, Volume= 0.050 af, Depth= 1.20" Routed to Reach EX 1 : Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NOAA 24-hr D 2-Year Rainfall=3.44" Area (sf) CN Description 21,722 74 >75% Grass cover, Good, HSG C 21,722 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.1 100 0.0220 0.18 Sheet Flow, Grass: Short n= 0.150 P2= 3.44" 1.4 295 0.0500 3.60 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 10.5 395 Total Subcatchment PR 1A-P: Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=21,722 sf Runoff Volume=0.050 af Runoff Depth=1.20" Flow Length=395' Tc=10.5 min CN=74 0.57 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.