complete drainage report rev 9

POA-3 2024-05-12 HydroCad - Proposed POA 3B NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 29 Time span=0.00-72.00 hrs, dt=0.01 hrs, 7201 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=2,500 sf 100.00% Impervious Runoff Depth=8.42" Flow Length=110' Slope=0.1200 '/' Tc=4.0 min CN=98 Runoff=0.51 cfs 0.040 af Subcatchment 28S: Basin 12 - Imp Runoff Area=5,251 sf 0.00% Impervious Runoff Depth=5.52" Flow Length=110' Slope=0.1200 '/' Tc=4.0 min CN=74 Runoff=0.83 cfs 0.055 af Subcatchment 30S: Basin 12 - Perv Pond 29P: Basin 12 Peak Elev=598.47' Storage=952 cf Inflow=1.33 cfs 0.096 af Outflow=0.21 cfs 0.096 af Total Runoff Area = 0.178 ac Runoff Volume = 0.096 af Average Runoff Depth = 6.46" 67.75% Pervious = 0.121 ac 32.25% Impervious = 0.057 ac