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 41HydroCAD® 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=6.00"Subcatchment PDA-1A (PERV): (new Subcat) Flow Length=203' Tc=5.9 min CN=78 Runoff=2.01 cfs 0.151 af Runoff Area=25,145 sf 100.00% Impervious Runoff Depth=8.42"Subcatchment PDA-1B (IMPERV): (new Flow Length=136' Tc=1.5 min CN=98 Runoff=5.25 cfs 0.405 af Runoff Area=58,772 sf 0.00% Impervious Runoff Depth=6.13"Subcatchment PDA-1B(PERV): (new Subcat) Flow Length=180' Tc=7.5 min CN=79 Runoff=8.79 cfs 0.689 af Runoff Area=11,760 sf 100.00% Impervious Runoff Depth=8.42"Subcatchment PDA-1C(IMPERV): (new Tc=1.0 min CN=98 Runoff=2.47 cfs 0.189 af Runoff Area=18,423 sf 0.00% Impervious Runoff Depth=6.00"Subcatchment PDA-1C(PERV): (new Subcat) Flow Length=123' Tc=7.2 min CN=78 Runoff=2.73 cfs 0.212 af Runoff Area=7,411 sf 0.00% Impervious Runoff Depth=5.76"Subcatchment PDA-2 (PERV.): (new Subcat) Flow Length=84' Slope=0.0833 '/' Tc=4.6 min CN=76 Runoff=1.14 cfs 0.082 af Inflow=9.24 cfs 1.550 afReach DP1-P: (new Reach) Outflow=9.24 cfs 1.550 af Inflow=1.14 cfs 0.082 afReach DP2-P: (new Reach) Outflow=1.14 cfs 0.082 af Inflow=12.54 cfs 1.094 afReach PDA-1B: (new Reach) Outflow=12.54 cfs 1.094 af Inflow=4.58 cfs 0.401 afReach PDA-1C: (new Reach) Outflow=4.58 cfs 0.401 af Peak Elev=18.25' Storage=0.412 af Inflow=12.54 cfs 1.094 afPond Basin 1: (new Pond) Outflow=5.92 cfs 1.026 af Peak Elev=17.46' Storage=0.065 af Inflow=4.58 cfs 0.401 afPond Basin 2: (new Pond) Outflow=4.52 cfs 0.373 af Total Runoff Area = 3.092 ac Runoff Volume = 1.728 af Average Runoff Depth = 6.71" 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.