241018_42 ERW_Stormwater Report_compiled

NOAA 24-hr D 10-Year Rainfall=5.22"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 30HydroCAD® 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 = 0.55 cfs @ 12.11 hrs, Volume= 0.039 af, Depth= 2.72" 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 10-Year Rainfall=5.22" 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) 0.6 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 10-Year Rainfall=5.22" Runoff Area=7,411 sf Runoff Volume=0.039 af Runoff Depth=2.72" Flow Length=84' Slope=0.0833 '/' Tc=4.6 min CN=76 0.55 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.