241018_42 ERW_Stormwater Report_compiled

NOAA 24-hr D 2-Year Rainfall=3.44"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 13HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment PDA-2 (PERV.): (new Subcat) [49] Hint: Tc<2dt may require smaller dt Runoff = 0.26 cfs @ 12.11 hrs, Volume= 0.019 af, Depth= 1.32" Routed to Reach DP2-P : (new Reach) 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 6,431 74 >75% Grass cover, Good, HSG C 980 89 Gravel roads, HSG C 7,411 76 Weighted Average 7,411 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 4.6 84 0.0833 0.30 Sheet Flow, Grass: Short n= 0.150 P2= 3.44" Subcatchment PDA-2 (PERV.): (new Subcat) Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=7,411 sf Runoff Volume=0.019 af Runoff Depth=1.32" Flow Length=84' Slope=0.0833 '/' Tc=4.6 min CN=76 0.26 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.