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 30HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR-2B-I: Runoff = 0.71 cfs @ 12.06 hrs, Volume= 0.053 af, Depth= 3.21" Routed to Pond 11P : Existing Drywell System 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 8,642 98 Paved parking, HSG C 8,642 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.1 75 0.0140 1.17 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.44" Subcatchment PR-2B-I: Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 0.75 0.7 0.65 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=8,642 sf Runoff Volume=0.053 af Runoff Depth=3.21" Flow Length=75' Slope=0.0140 '/' Tc=1.1 min CN=98 0.71 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.