241018_42 ERW_Stormwater Report_compiled

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=13,167 sf 0.00% Impervious Runoff Depth=1.45"Subcatchment PDA-1A (PERV): (new Subcat) Flow Length=203' Tc=5.9 min CN=78 Runoff=0.50 cfs 0.037 af Runoff Area=25,145 sf 100.00% Impervious Runoff Depth=3.21"Subcatchment PDA-1B (IMPERV): (new Flow Length=136' Tc=1.5 min CN=98 Runoff=2.07 cfs 0.154 af Runoff Area=58,772 sf 0.00% Impervious Runoff Depth=1.52"Subcatchment PDA-1B(PERV): (new Subcat) Flow Length=180' Tc=7.5 min CN=79 Runoff=2.24 cfs 0.171 af Runoff Area=11,760 sf 100.00% Impervious Runoff Depth=3.21"Subcatchment PDA-1C(IMPERV): (new Tc=1.0 min CN=98 Runoff=0.97 cfs 0.072 af Runoff Area=18,423 sf 0.00% Impervious Runoff Depth=1.45"Subcatchment PDA-1C(PERV): (new Subcat) Flow Length=123' Tc=7.2 min CN=78 Runoff=0.68 cfs 0.051 af Runoff Area=7,411 sf 0.00% Impervious Runoff Depth=1.32"Subcatchment PDA-2 (PERV.): (new Subcat) Flow Length=84' Slope=0.0833 '/' Tc=4.6 min CN=76 Runoff=0.26 cfs 0.019 af Inflow=1.41 cfs 0.389 afReach DP1-P: (new Reach) Outflow=1.41 cfs 0.389 af Inflow=0.26 cfs 0.019 afReach DP2-P: (new Reach) Outflow=0.26 cfs 0.019 af Inflow=3.81 cfs 0.325 afReach PDA-1B: (new Reach) Outflow=3.81 cfs 0.325 af Inflow=1.45 cfs 0.123 afReach PDA-1C: (new Reach) Outflow=1.45 cfs 0.123 af Peak Elev=14.76' Storage=0.164 af Inflow=3.81 cfs 0.325 afPond Basin 1: (new Pond) Outflow=0.57 cfs 0.258 af Peak Elev=16.61' Storage=0.054 af Inflow=1.45 cfs 0.123 afPond Basin 2: (new Pond) Outflow=0.67 cfs 0.095 af Total Runoff Area = 3.092 ac Runoff Volume = 0.504 af Average Runoff Depth = 1.96" 72.60% Pervious = 2.245 ac 27.40% Impervious = 0.847 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.