complete drainage report rev 9

POA-2 2024-05-12 HydroCad - Proposed POA 2B-1 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 7 Time span=0.00-80.00 hrs, dt=0.04 hrs, 2001 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=6,824 sf 100.00% Impervious Runoff Depth=3.21" Flow Length=75' Slope=0.0400 '/' Tc=8.3 min CN=98 Runoff=0.47 cfs 1,824 cf Subcatchment 19S: Basin 3 - Imp Runoff Area=15,086 sf 0.00% Impervious Runoff Depth=1.20" Flow Length=75' Slope=0.0400 '/' Tc=8.3 min CN=74 Runoff=0.43 cfs 1,507 cf Subcatchment 20S: 15775.6 Runoff Area=41,524 sf 100.00% Impervious Runoff Depth=3.21" Flow Length=755' Slope=0.0200 '/' Tc=5.5 min CN=98 Runoff=3.13 cfs 11,096 cf Subcatchment 21S: Basin 4 - Imp Runoff Area=7,526 sf 0.00% Impervious Runoff Depth=1.20" Flow Length=755' Slope=0.0200 '/' Tc=5.5 min CN=74 Runoff=0.24 cfs 752 cf Subcatchment 24S: Basin 4 - Perv Subcatchment 25S: Basin 2 - Perv Runoff Area=82,260 sf 0.00% Impervious Runoff Depth=1.39" Flow Length=463' Tc=10.5 min CN=77 Runoff=2.54 cfs 9,502 cf Subcatchment 28S: Basin 2 - Imp Runoff Area=30,173 sf 100.00% Impervious Runoff Depth=3.21" Flow Length=463' Tc=10.5 min CN=98 Runoff=1.91 cfs 8,063 cf Subcatchment 29S: Basin 8 - Imp Runoff Area=38,257 sf 100.00% Impervious Runoff Depth=3.21" Flow Length=165' Tc=8.6 min CN=98 Runoff=2.60 cfs 10,223 cf Subcatchment 30S: Basin 8 - Perv Runoff Area=22,787 sf 0.00% Impervious Runoff Depth=1.39" Flow Length=165' Tc=8.6 min CN=77 Runoff=0.76 cfs 2,632 cf Subcatchment 31S: Basin 7 - Imp Runoff Area=45,778 sf 100.00% Impervious Runoff Depth=3.21" Flow Length=760' Tc=12.5 min CN=98 Runoff=2.74 cfs 12,233 cf Subcatchment 32S: Basin 7 - Perv Runoff Area=58,678 sf 0.00% Impervious Runoff Depth=1.39" Flow Length=760' Tc=12.5 min CN=77 Runoff=1.70 cfs 6,778 cf Subcatchment 35S: DA 2 Und - Imp Runoff Area=52,513 sf 100.00% Impervious Runoff Depth=3.21" Flow Length=160' Tc=9.8 min CN=98 Runoff=3.41 cfs 14,033 cf Subcatchment 36S: DA 2 Und - Perv Runoff Area=119,952 sf 0.00% Impervious Runoff Depth=1.39" Flow Length=160' Tc=9.8 min CN=77 Runoff=3.80 cfs 13,855 cf Subcatchment 45S: Basin 11 - Imp Runoff Area=59,901 sf 100.00% Impervious Runoff Depth=3.21" Flow Length=233'

mpervious Runoff Depth=1.39" Flow Length=160' Tc=9.8 min CN=77 Runoff=3.80 cfs 13,855 cf Subcatchment 45S: Basin 11 - Imp Runoff Area=59,901 sf 100.00% Impervious Runoff Depth=3.21" Flow Length=233' Tc=9.8 min CN=98 Runoff=3.89 cfs 16,007 cf Subcatchment 46S: Basin 11 - Perv Runoff Area=24,202 sf 0.00% Impervious Runoff Depth=1.32" Flow Length=233' Tc=9.8 min CN=76 Runoff=0.73 cfs 2,666 cf Subcatchment 51S: Basin 10 - Imp Runoff Area=53,114 sf 100.00% Impervious Runoff Depth=3.21" Flow Length=379' Tc=10.7 min CN=98 Runoff=3.35 cfs 14,193 cf Subcatchment 52S: Basin 10 - Perv Runoff Area=37,235 sf 0.00% Impervious Runoff Depth=1.26" Flow Length=379' Tc=10.7 min CN=75 Runoff=1.03 cfs 3,908 cf