241220_42 ERW_Stormwater Report FULL

NOAA 24-hr D 2-Year Rainfall=3.44"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 7HydroCAD® 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=3.21"Subcatchment EDA-1 (IMPERV): Flow Length=275' Tc=2.8 min CN=98 Runoff=1.14 cfs 0.085 af Runoff Area=102,351 sf 0.00% Impervious Runoff Depth=1.20"Subcatchment EDA-1 (PERV): Flow Length=501' Tc=13.1 min CN=74 Runoff=2.46 cfs 0.235 af Runoff Area=18,430 sf 0.00% Impervious Runoff Depth=1.20"Subcatchment EDA-2 (PERV.): Flow Length=121' Tc=7.2 min CN=74 Runoff=0.55 cfs 0.042 af Inflow=2.85 cfs 0.320 afReach DP1-EX: Outflow=2.85 cfs 0.320 af Inflow=0.55 cfs 0.042 afReach DP2-EX: Outflow=0.55 cfs 0.042 af Total Runoff Area = 3.092 ac Runoff Volume = 0.362 af Average Runoff Depth = 1.41" 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.