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 4HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Runoff Area=2,878 sf 100.00% Impervious Runoff Depth=3.21"Subcatchment 1S: 2BP-I Flow Length=75' Slope=0.0140 '/' Tc=1.1 min CN=98 Runoff=0.24 cfs 0.018 af Runoff Area=9,508 sf 100.00% Impervious Runoff Depth=3.21"Subcatchment EX 1-I: Flow Length=149' Tc=1.6 min CN=98 Runoff=0.78 cfs 0.058 af Runoff Area=34,310 sf 0.00% Impervious Runoff Depth=1.26"Subcatchment EX 1-P: Flow Length=233' Tc=10.4 min CN=75 Runoff=0.95 cfs 0.083 af Runoff Area=33,427 sf 0.00% Impervious Runoff Depth=1.20"Subcatchment EX 2-P: Flow Length=251' Tc=10.1 min CN=74 Runoff=0.88 cfs 0.077 af Runoff Area=12,817 sf 0.00% Impervious Runoff Depth=1.32"Subcatchment EX 3 - P: Flow Length=109' Tc=7.8 min CN=76 Runoff=0.42 cfs 0.032 af Runoff Area=2,919 sf 100.00% Impervious Runoff Depth=3.21"Subcatchment PR 1A-I: Flow Length=149' Tc=1.6 min CN=98 Runoff=0.24 cfs 0.018 af Runoff Area=21,722 sf 0.00% Impervious Runoff Depth=1.20"Subcatchment PR 1A-P: Flow Length=395' Tc=10.5 min CN=74 Runoff=0.57 cfs 0.050 af Runoff Area=6,622 sf 0.00% Impervious Runoff Depth=2.30"Subcatchment PR 1B-P: Tc=6.0 min CN=89 Runoff=0.39 cfs 0.029 af Runoff Area=6,039 sf 0.00% Impervious Runoff Depth=1.20"Subcatchment PR 2A-P: Flow Length=81' Slope=0.3000 '/' Tc=2.7 min CN=74 Runoff=0.21 cfs 0.014 af Runoff Area=5,659 sf 100.00% Impervious Runoff Depth=3.21"Subcatchment PR 2C-I: Flow Length=86' Slope=0.0230 '/' Tc=1.0 min CN=98 Runoff=0.47 cfs 0.035 af Runoff Area=21,408 sf 0.00% Impervious Runoff Depth=1.20"Subcatchment PR 2C-P: Flow Length=100' Slope=0.0200 '/' Tc=9.4 min CN=74 Runoff=0.58 cfs 0.049 af Runoff Area=10,406 sf 0.00% Impervious Runoff Depth=1.20"Subcatchment PR 3 - P: Flow Length=109' Tc=7.8 min CN=74 Runoff=0.30 cfs 0.024 af Runoff Area=8,642 sf 100.00% Impervious Runoff Depth=3.21"Subcatchment PR-2B-I: Flow Length=75' Slope=0.0140 '/' Tc=1.1 min CN=98 Runoff=0.71 cfs 0.053 af Runoff Area=1,446 sf 0.00% Impervious Runoff Depth=1.20"Subcatchment PR-2B-P: Flow Length=114' Tc=8.0 min CN=74 Runoff=0.04 cfs 0.003 af Inflow=1.41 cfs 0.141

Tc=1.1 min CN=98 Runoff=0.71 cfs 0.053 af Runoff Area=1,446 sf 0.00% Impervious Runoff Depth=1.20"Subcatchment PR-2B-P: Flow Length=114' Tc=8.0 min CN=74 Runoff=0.04 cfs 0.003 af Inflow=1.41 cfs 0.141 afReach 1R: TOP Outflow=1.41 cfs 0.141 af Inflow=2.08 cfs 0.218 afReach 2R: CHANNEL Outflow=2.08 cfs 0.218 af Inflow=2.47 cfs 0.250 afReach 3R: TOTAL Outflow=2.47 cfs 0.250 af This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.