250701_42 ERW_Stormwater Report

250624_42 ERW Waymaker NOAA 24-hr D 25-Year Rainfall=6.44" Prepared by Colliers Engineering & Design HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Printed 7/1/2025 Page 13 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 Subcatchment PR 2-P: Reach DP2-PR: Runoff Area=7,405 sf 0.00% Impervious Runoff Depth=3.76" Flow Length=84' Slope=0.0833 '/' Tc=4.6 min CN=76 Runoff=0.76 cfs 0.053 af Inflow=0.76 cfs 0.053 af Outflow=0.76 cfs 0.053 af Total Runoff Area = 0.170 ac Runoff Volume = 0.053 af Average Runoff Depth = 3.76" 100.00% Pervious = 0.170 ac 0.00% Impervious = 0.000 ac