complete drainage report rev 9

00 0.00 0.00 0.00 0.00 0.00 Primary (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

POA-2 2024-05-12 HydroCad - Proposed POA 2B-1 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 111 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=4.98" Flow Length=75' Slope=0.0400 '/' Tc=8.3 min CN=98 Runoff=0.71 cfs 2,834 cf Subcatchment 19S: Basin 3 - Imp Runoff Area=15,086 sf 0.00% Impervious Runoff Depth=2.54" Flow Length=75' Slope=0.0400 '/' Tc=8.3 min CN=74 Runoff=0.94 cfs 3,194 cf Subcatchment 20S: 15775.6 Runoff Area=41,524 sf 100.00% Impervious Runoff Depth=4.98" Flow Length=755' Slope=0.0200 '/' Tc=5.5 min CN=98 Runoff=4.78 cfs 17,242 cf Subcatchment 21S: Basin 4 - Imp Runoff Area=7,526 sf 0.00% Impervious Runoff Depth=2.54" Flow Length=755' Slope=0.0200 '/' Tc=5.5 min CN=74 Runoff=0.52 cfs 1,594 cf Subcatchment 24S: Basin 4 - Perv Subcatchment 25S: Basin 2 - Perv Runoff Area=82,260 sf 0.00% Impervious Runoff Depth=2.81" Flow Length=463' Tc=10.5 min CN=77 Runoff=5.19 cfs 19,249 cf Subcatchment 28S: Basin 2 - Imp Runoff Area=30,173 sf 100.00% Impervious Runoff Depth=4.98" Flow Length=463' Tc=10.5 min CN=98 Runoff=2.92 cfs 12,529 cf Subcatchment 29S: Basin 8 - Imp Runoff Area=38,257 sf 100.00% Impervious Runoff Depth=4.98" Flow Length=165' Tc=8.6 min CN=98 Runoff=3.97 cfs 15,886 cf Subcatchment 30S: Basin 8 - Perv Runoff Area=22,787 sf 0.00% Impervious Runoff Depth=2.81" Flow Length=165' Tc=8.6 min CN=77 Runoff=1.55 cfs 5,332 cf Subcatchment 31S: Basin 7 - Imp Runoff Area=45,778 sf 100.00% Impervious Runoff Depth=4.98" Flow Length=760' Tc=12.5 min CN=98 Runoff=4.18 cfs 19,009 cf Subcatchment 32S: Basin 7 - Perv Runoff Area=58,678 sf 0.00% Impervious Runoff Depth=2.81" Flow Length=760' Tc=12.5 min CN=77 Runoff=3.49 cfs 13,731 cf Subcatchment 35S: DA 2 Und - Imp Runoff Area=52,513 sf 100.00% Impervious Runoff Depth=4.98" Flow Length=160' Tc=9.8 min CN=98 Runoff=5.21 cfs 21,805 cf Subcatchment 36S: DA 2 Und - Perv Runoff Area=119,952 sf 0.00% Impervious Runoff Depth=2.81" Flow Length=160' Tc=9.8 min CN=77 Runoff=7.79 cfs 28,070 cf Subcatchment 45S: Basin 11 - Imp Runoff Area=59,901 sf 100.00% Impervious Runoff Depth=4.98" Flow

2 sf 0.00% Impervious Runoff Depth=2.81" Flow Length=160' Tc=9.8 min CN=77 Runoff=7.79 cfs 28,070 cf Subcatchment 45S: Basin 11 - Imp Runoff Area=59,901 sf 100.00% Impervious Runoff Depth=4.98" Flow Length=233' Tc=9.8 min CN=98 Runoff=5.95 cfs 24,873 cf Subcatchment 46S: Basin 11 - Perv Runoff Area=24,202 sf 0.00% Impervious Runoff Depth=2.72" Flow Length=233' Tc=9.8 min CN=76 Runoff=1.52 cfs 5,482 cf Subcatchment 51S: Basin 10 - Imp Runoff Area=53,114 sf 100.00% Impervious Runoff Depth=4.98" Flow Length=379' Tc=10.7 min CN=98 Runoff=5.12 cfs 22,055 cf Subcatchment 52S: Basin 10 - Perv Runoff Area=37,235 sf 0.00% Impervious Runoff Depth=2.63" Flow Length=379' Tc=10.7 min CN=75 Runoff=2.19 cfs 8,157 cf

POA-2 2024-05-12 HydroCad - Proposed POA 2B-1 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 112 Subcatchment 53S: Basin 9 - Imp Runoff Area=17,461 sf 100.00% Impervious Runoff Depth=4.98" Flow Length=140' Tc=7.4 min CN=98 Runoff=1.87 cfs 7,250 cf Subcatchment 54S: Basin 9 - Perv Runoff Area=8,916 sf 0.00% Impervious Runoff Depth=2.90" Flow Length=140' Tc=7.4 min CN=78 Runoff=0.65 cfs 2,154 cf Pond 21P: Basin 3 Peak Elev=559.09' Storage=183 cf Inflow=1.65 cfs 6,028 cf Discarded=1.21 cfs 6,028 cf Primary=0.00 cfs 0 cf Outflow=1.21 cfs 6,028 cf Pond 22P: Basin 4 Peak Elev=572.69' Storage=3,380 cf Inflow=5.30 cfs 18,836 cf Discarded=1.13 cfs 18,660 cf Primary=0.10 cfs 176 cf Outflow=1.23 cfs 18,836 cf Pond 27P: Basin 2 Peak Elev=545.18' Storage=18,379 cf Inflow=8.13 cfs 31,954 cf Outflow=0.93 cfs 22,643 cf Pond 33P: Basin 11 Peak Elev=590.37' Storage=1,989 cf Inflow=7.47 cfs 30,355 cf Discarded=3.13 cfs 28,464 cf Primary=2.25 cfs 1,891 cf Outflow=5.37 cfs 30,355 cf Pond 41P: Basin 10 Peak Elev=576.44' Storage=4,207 cf Inflow=7.31 cfs 30,212 cf Discarded=2.22 cfs 28,927 cf Primary=0.93 cfs 1,285 cf Outflow=3.14 cfs 30,212 cf Pond 42P: Basin 9 Peak Elev=562.64' Storage=1,667 cf Inflow=2.52 cfs 9,405 cf Discarded=0.61 cfs 9,405 cf Primary=0.00 cfs 0 cf Outflow=0.61 cfs 9,405 cf Pond 48P: Basin 8 Peak Elev=573.44' Storage=1,768 cf Inflow=5.52 cfs 21,218 cf Discarded=2.83 cfs 21,218 cf Primary=0.00 cfs 0 cf Outflow=2.83 cfs 21,218 cf Pond 49P: Basin 7 Peak Elev=532.09' Storage=16,775 cf Inflow=7.67 cfs 32,740 cf Outflow=1.73 cfs 26,967 cf Link 28L: POA 2 Inflow=15.29 cfs 102,660 cf Primary=15.29 cfs 102,660 cf Link 34L: DA 2 Undetained Inflow=13.00 cfs 49,875 cf Primary=13.00 cfs 49,875 cf Total Runoff Area = 722,187 sf Runoff Volume = 230,446 cf Average Runoff Depth = 3.83" 52.15% Pervious = 376,642 sf 47.85% Impervious = 345,545 sf

POA-2 NOAA 24-hr D 10-Year Rainfall=5.22" 2024-05-12 HydroCad - Proposed POA 2B-1 Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 113 Summary for Subcatchment 19S: Basin 3 - Imp Runoff = 0.71 cfs @ 12.15 hrs, Volume= Routed to Pond 21P : Basin 3 2,834 cf, Depth= 4.98" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-80.00 hrs, dt= 0.04 hrs NOAA 24-hr D 10-Year Rainfall=5.22" Area (sf) 5,876 948 6,824 6,824 * CN 98 98 98 Description Paved parking, HSG C impervious other than pavement Weighted Average 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.3 75 0.0400 0.15 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" Sheet Flow (A-B) Subcatchment 19S: Basin 3 - Imp Subcatchment 19S: Basin 3 - Imp Hydrograph 0.8 0.75 0.7 0.65 0.6 0.55 Flow (cfs) 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 Runoff 0.71 cfs NOAA 24-hr D 10-Year Rainfall=5.22" Runoff Area=6,824 sf Runoff Volume=2,834 cf Runoff Depth=4.98" Flow Length=75' Slope=0.0400 '/' Tc=8.3 min CN=98 0.1 0.05 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 Time (hours)

POA-2 2024-05-12 HydroCad - Proposed POA 2B-1 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 19S: Basin 3 - Imp Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 0.80 0.05 0.00 1.60 0.10 0.01 2.40 0.15 0.04 3.20 0.21 0.08 4.00 0.27 0.12 4.80 0.34 0.18 5.60 0.41 0.24 6.40 0.48 0.30 7.20 0.57 0.39 8.00 0.68 0.48 8.80 0.80 0.59 9.60 0.94 0.74 10.40 1.14 0.93 11.20 1.46 1.24 12.00 2.50 2.27 12.80 3.76 3.53 13.60 4.08 3.84 14.40 4.28 4.04 15.20 4.42 4.19 16.00 4.54 4.31 16.80 4.65 4.41 17.60 4.74 4.50 18.40 4.81 4.57 19.20 4.88 4.64 20.00 4.95 4.71 20.80 5.01 4.77 21.60 5.07 4.83 22.40 5.12 4.88 23.20 5.17 4.94 24.00 5.22 4.98 24.80 5.22 4.98 25.60 5.22 4.98 26.40 5.22 4.98 27.20 5.22 4.98 28.00 5.22 4.98 28.80 5.22 4.98 29.60 5.22 4.98 30.40 5.22 4.98 31.20 5.22 4.98 32.00 5.22 4.98 32.80 5.22 4.98 33.60 5.22 4.98 34.40 5.22 4.98 35.20 5.22 4.98 36.00 5.22 4.98 36.80 5.22 4.98 37.60 5.22 4.98 38.40 5.22 4.98 39.20 5.22 4.98 40.00 5.22 4.98 Runoff (cfs) 0.00 0.00 0.00 0.01 0.01 0.01 0.01 0.01 0.01 0.02 0.02 0.02 0.03 0.04 0.08 0.36 0.10 0.05 0.04 0.03 0.02 0.02 0.02 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Time Precip. Excess (hours) (inches)

04 0.03 0.02 0.02 0.02 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Time Precip. Excess (hours) (inches) (inches) 40.80 5.22 4.98 41.60 5.22 4.98 42.40 5.22 4.98 43.20 5.22 4.98 44.00 5.22 4.98 44.80 5.22 4.98 45.60 5.22 4.98 46.40 5.22 4.98 47.20 5.22 4.98 48.00 5.22 4.98 48.80 5.22 4.98 49.60 5.22 4.98 50.40 5.22 4.98 51.20 5.22 4.98 52.00 5.22 4.98 52.80 5.22 4.98 53.60 5.22 4.98 54.40 5.22 4.98 55.20 5.22 4.98 56.00 5.22 4.98 56.80 5.22 4.98 57.60 5.22 4.98 58.40 5.22 4.98 59.20 5.22 4.98 60.00 5.22 4.98 60.80 5.22 4.98 61.60 5.22 4.98 62.40 5.22 4.98 63.20 5.22 4.98 64.00 5.22 4.98 64.80 5.22 4.98 65.60 5.22 4.98 66.40 5.22 4.98 67.20 5.22 4.98 68.00 5.22 4.98 68.80 5.22 4.98 69.60 5.22 4.98 70.40 5.22 4.98 71.20 5.22 4.98 72.00 5.22 4.98 72.80 5.22 4.98 73.60 5.22 4.98 74.40 5.22 4.98 75.20 5.22 4.98 76.00 5.22 4.98 76.80 5.22 4.98 77.60 5.22 4.98 78.40 5.22 4.98 79.20 5.22 4.98 80.00 5.22 4.98 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Printed 10/25/2024 Page 114

POA-2 NOAA 24-hr D 10-Year Rainfall=5.22" 2024-05-12 HydroCad - Proposed POA 2B-1 Printed 10/25/2024 Page 115 Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 20S: 15775.6 Runoff = 0.94 cfs @ 12.16 hrs, Volume= Routed to Pond 21P : Basin 3 3,194 cf, Depth= 2.54" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-80.00 hrs, dt= 0.04 hrs NOAA 24-hr D 10-Year Rainfall=5.22" Area (sf) 15,086 15,086 CN 74 Description >75% Grass cover, Good, HSG C 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.3 75 0.0400 0.15 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" Sheet Flow (A-B) Subcatchment 20S: 15775.6 Subcatchment 20S: 15775.6 Hydrograph 1 Runoff 0.94 cfs Flow (cfs) NOAA 24-hr D 10-Year Rainfall=5.22" Runoff Area=15,086 sf Runoff Volume=3,194 cf Runoff Depth=2.54" Flow Length=75' Slope=0.0400 '/' Tc=8.3 min CN=74 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 Time (hours)

POA-2 2024-05-12 HydroCad - Proposed POA 2B-1 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 20S: 15775.6 Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 0.80 0.05 0.00 1.60 0.10 0.00 2.40 0.15 0.00 3.20 0.21 0.00 4.00 0.27 0.00 4.80 0.34 0.00 5.60 0.41 0.00 6.40 0.48 0.00 7.20 0.57 0.00 8.00 0.68 0.00 8.80 0.80 0.00 9.60 0.94 0.02 10.40 1.14 0.05 11.20 1.46 0.13 12.00 2.50 0.61 12.80 3.76 1.42 13.60 4.08 1.65 14.40 4.28 1.80 15.20 4.42 1.91 16.00 4.54 2.01 16.80 4.65 2.09 17.60 4.74 2.16 18.40 4.81 2.21 19.20 4.88 2.27 20.00 4.95 2.32 20.80 5.01 2.37 21.60 5.07 2.42 22.40 5.12 2.46 23.20 5.17 2.50 24.00 5.22 2.54 24.80 5.22 2.54 25.60 5.22 2.54 26.40 5.22 2.54 27.20 5.22 2.54 28.00 5.22 2.54 28.80 5.22 2.54 29.60 5.22 2.54 30.40 5.22 2.54 31.20 5.22 2.54 32.00 5.22 2.54 32.80 5.22 2.54 33.60 5.22 2.54 34.40 5.22 2.54 35.20 5.22 2.54 36.00 5.22 2.54 36.80 5.22 2.54 37.60 5.22 2.54 38.40 5.22 2.54 39.20 5.22 2.54 40.00 5.22 2.54 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.05 0.41 0.16 0.08 0.06 0.04 0.04 0.03 0.03 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Time Precip. Excess (hours) (inches)

06 0.04 0.04 0.03 0.03 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Time Precip. Excess (hours) (inches) (inches) 40.80 5.22 2.54 41.60 5.22 2.54 42.40 5.22 2.54 43.20 5.22 2.54 44.00 5.22 2.54 44.80 5.22 2.54 45.60 5.22 2.54 46.40 5.22 2.54 47.20 5.22 2.54 48.00 5.22 2.54 48.80 5.22 2.54 49.60 5.22 2.54 50.40 5.22 2.54 51.20 5.22 2.54 52.00 5.22 2.54 52.80 5.22 2.54 53.60 5.22 2.54 54.40 5.22 2.54 55.20 5.22 2.54 56.00 5.22 2.54 56.80 5.22 2.54 57.60 5.22 2.54 58.40 5.22 2.54 59.20 5.22 2.54 60.00 5.22 2.54 60.80 5.22 2.54 61.60 5.22 2.54 62.40 5.22 2.54 63.20 5.22 2.54 64.00 5.22 2.54 64.80 5.22 2.54 65.60 5.22 2.54 66.40 5.22 2.54 67.20 5.22 2.54 68.00 5.22 2.54 68.80 5.22 2.54 69.60 5.22 2.54 70.40 5.22 2.54 71.20 5.22 2.54 72.00 5.22 2.54 72.80 5.22 2.54 73.60 5.22 2.54 74.40 5.22 2.54 75.20 5.22 2.54 76.00 5.22 2.54 76.80 5.22 2.54 77.60 5.22 2.54 78.40 5.22 2.54 79.20 5.22 2.54 80.00 5.22 2.54 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Printed 10/25/2024 Page 116