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 10HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment EX 1-P: Runoff = 0.95 cfs @ 12.19 hrs, Volume= 0.083 af, Depth= 1.26" Routed to Reach 4R : 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 32,830 74 >75% Grass cover, Good, HSG C 1,480 89 Gravel roads, HSG C 34,310 75 Weighted Average 34,310 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 100 0.0175 0.17 Sheet Flow, Grass: Short n= 0.150 P2= 3.44" 0.4 133 0.1070 5.27 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 10.4 233 Total Subcatchment EX 1-P: Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 1 0 NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=34,310 sf Runoff Volume=0.083 af Runoff Depth=1.26" Flow Length=233' Tc=10.4 min CN=75 0.95 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.