241018_42 ERW_Stormwater Report_compiled

NOAA 24-hr D 100-Year Rainfall=8.66"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 19HydroCAD® 10.20-4b s/n 04431 © 2023 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=13,913 sf 100.00% Impervious Runoff Depth=8.42"Subcatchment EDA-1 (IMPERV): Flow Length=275' Tc=2.8 min CN=98 Runoff=2.89 cfs 0.224 af Runoff Area=102,351 sf 0.00% Impervious Runoff Depth=5.52"Subcatchment EDA-1 (PERV): Flow Length=501' Tc=13.1 min CN=74 Runoff=11.62 cfs 1.081 af Runoff Area=18,430 sf 0.00% Impervious Runoff Depth=5.52"Subcatchment EDA-2 (PERV.): Flow Length=121' Tc=7.2 min CN=74 Runoff=2.54 cfs 0.195 af Inflow=12.64 cfs 1.305 afReach DP1-EX: Outflow=12.64 cfs 1.305 af Inflow=2.54 cfs 0.195 afReach DP2-EX: Outflow=2.54 cfs 0.195 af Total Runoff Area = 3.092 ac Runoff Volume = 1.500 af Average Runoff Depth = 5.82" 89.67% Pervious = 2.773 ac 10.33% Impervious = 0.319 ac This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.