complete drainage report rev 9

POA-1 2024-05-12 HydroCad - Proposed POA 1B-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 50 Summary for Subcatchment 14S: Basin 1 - Imp Runoff = 12.98 cfs @ 12.21 hrs, Volume= Routed to Pond 16P : Basin 1 61,277 cf, Depth= 4.98" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-Year Rainfall=5.22" * Area (sf) 9,022 28,163 110,386 147,571 147,571 CN 98 98 98 98 Description non parking impervious Paved parking, HSG C Roofs, HSG C Weighted Average 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.0 59 0.0200 0.11 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" Using McCuen-Spiess flow length 1.7 425 0.0650 4.10 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps 3.4 516 2.50 Direct Entry, Pipe Flow (C-D) 14.1 1,000 Total Sheet Flow (A-B) SCF (B-C) Subcatchment 14S: Basin 1 - Imp Pipe Flow (C-D)

POA-1 2024-05-12 HydroCad - Proposed POA 1B-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 51 Subcatchment 14S: Basin 1 - Imp Hydrograph Runoff 14 12.98 cfs 13 NOAA 24-hr D 10-Year Rainfall=5.22" Runoff Area=147,571 sf Runoff Volume=61,277 cf Runoff Depth=4.98" Flow Length=1,000' Tc=14.1 min CN=98 12 11 10 Flow (cfs) 9 8 7 6 5 4 3 2 1 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 Time (hours)

POA-1 2024-05-12 HydroCad - Proposed POA 1B-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 14S: Basin 1 - Imp Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 1.00 0.06 0.00 2.00 0.13 0.02 3.00 0.20 0.07 4.00 0.27 0.12 5.00 0.36 0.19 6.00 0.45 0.27 7.00 0.55 0.36 8.00 0.68 0.48 9.00 0.83 0.63 10.00 1.03 0.82 11.00 1.36 1.14 12.00 2.50 2.27 13.00 3.86 3.63 14.00 4.19 3.95 15.00 4.39 4.16 16.00 4.54 4.31 17.00 4.67 4.43 18.00 4.77 4.54 19.00 4.86 4.63 20.00 4.95 4.71 21.00 5.02 4.79 22.00 5.09 4.86 23.00 5.16 4.92 24.00 5.22 4.98 25.00 5.22 4.98 26.00 5.22 4.98 27.00 5.22 4.98 28.00 5.22 4.98 29.00 5.22 4.98 30.00 5.22 4.98 31.00 5.22 4.98 32.00 5.22 4.98 33.00 5.22 4.98 34.00 5.22 4.98 35.00 5.22 4.98 36.00 5.22 4.98 37.00 5.22 4.98 38.00 5.22 4.98 39.00 5.22 4.98 40.00 5.22 4.98 41.00 5.22 4.98 42.00 5.22 4.98 43.00 5.22 4.98 44.00 5.22 4.98 45.00 5.22 4.98 46.00 5.22 4.98 47.00 5.22 4.98 48.00 5.22 4.98 49.00 5.22 4.98 50.00 5.22 4.98 Runoff (cfs) 0.00 0.01 0.10 0.16 0.21 0.24 0.27 0.35 0.43 0.51 0.76 1.29 5.65 1.99 0.91 0.63 0.49 0.41 0.33 0.30 0.28 0.26 0.24 0.22 0.20 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 Time Precip. Excess (hours) (inches) (inches) 51.00 5.22 4.98 52.00 5.22 4.98 53.00 5.22 4.98 54.00 5.22 4.98 55.00 5.22 4.98 56.00 5.22 4.98 57.00 5.22 4.98 58.00 5.22 4.98 59.00 5.22 4.98 60.00 5.22 4.98 61.00 5.22 4.98 62.00 5.22 4.98 63.00 5.22 4.98 64.00 5.22 4.98 65.00 5.22 4.98 66.00 5.22 4.98 67.00 5.22 4.98 68.00 5.22 4.98 69.00 5.22 4.98 70.00 5.22 4.98 71.00 5.22 4.98 72.00 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 Printed 10/25/2024 Page 52

POA-1 2024-05-12 HydroCad - Proposed POA 1B-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 53 Summary for Subcatchment 15S: Basin 1 - Perv Runoff = 6.53 cfs @ 12.22 hrs, Volume= Routed to Pond 16P : Basin 1 26,815 cf, Depth= 2.81" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-Year Rainfall=5.22" Area (sf) 64,900 49,690 114,590 114,590 CN 80 74 77 Description >75% Grass cover, Good, HSG D >75% Grass cover, Good, HSG C Weighted Average 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.0 59 0.0200 0.11 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" Using McCuen-Spiess flow length 1.7 425 0.0650 4.10 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps 3.4 516 2.50 Direct Entry, Pipe Flow (C-D) 14.1 1,000 Total Sheet Flow (A-B) SCF (B-C) Subcatchment 15S: Basin 1 - Perv Pipe Flow (C-D)

POA-1 2024-05-12 HydroCad - Proposed POA 1B-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 54 Subcatchment 15S: Basin 1 - Perv Hydrograph Runoff 7 6.53 cfs NOAA 24-hr D 10-Year Rainfall=5.22" Runoff Area=114,590 sf Runoff Volume=26,815 cf Runoff Depth=2.81" Flow Length=1,000' Tc=14.1 min CN=77 6 Flow (cfs) 5 4 3 2 1 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 Time (hours)

POA-1 2024-05-12 HydroCad - Proposed POA 1B-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 15S: Basin 1 - Perv Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 1.00 0.06 0.00 2.00 0.13 0.00 3.00 0.20 0.00 4.00 0.27 0.00 5.00 0.36 0.00 6.00 0.45 0.00 7.00 0.55 0.00 8.00 0.68 0.00 9.00 0.83 0.02 10.00 1.03 0.06 11.00 1.36 0.15 12.00 2.50 0.74 13.00 3.86 1.71 14.00 4.19 1.96 15.00 4.39 2.12 16.00 4.54 2.25 17.00 4.67 2.35 18.00 4.77 2.44 19.00 4.86 2.51 20.00 4.95 2.58 21.00 5.02 2.64 22.00 5.09 2.70 23.00 5.16 2.76 24.00 5.22 2.81 25.00 5.22 2.81 26.00 5.22 2.81 27.00 5.22 2.81 28.00 5.22 2.81 29.00 5.22 2.81 30.00 5.22 2.81 31.00 5.22 2.81 32.00 5.22 2.81 33.00 5.22 2.81 34.00 5.22 2.81 35.00 5.22 2.81 36.00 5.22 2.81 37.00 5.22 2.81 38.00 5.22 2.81 39.00 5.22 2.81 40.00 5.22 2.81 41.00 5.22 2.81 42.00 5.22 2.81 43.00 5.22 2.81 44.00 5.22 2.81 45.00 5.22 2.81 46.00 5.22 2.81 47.00 5.22 2.81 48.00 5.22 2.81 49.00 5.22 2.81 50.00 5.22 2.81 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.05 0.13 0.34 2.40 1.18 0.56 0.39 0.31 0.26 0.21 0.19 0.18 0.17 0.16 0.14 0.13 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 Time Precip. Excess (hours) (inches) (inches) 51.00 5.22 2.81 52.00 5.22 2.81 53.00 5.22 2.81 54.00 5.22 2.81 55.00 5.22 2.81 56.00 5.22 2.81 57.00 5.22 2.81 58.00 5.22 2.81 59.00 5.22 2.81 60.00 5.22 2.81 61.00 5.22 2.81 62.00 5.22 2.81 63.00 5.22 2.81 64.00 5.22 2.81 65.00 5.22 2.81 66.00 5.22 2.81 67.00 5.22 2.81 68.00 5.22 2.81 69.00 5.22 2.81 70.00 5.22 2.81 71.00 5.22 2.81 72.00 5.22 2.81 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 Printed 10/25/2024 Page 55

POA-1 NOAA 24-hr D 10-Year Rainfall=5.22" 2024-05-12 HydroCad - Proposed POA 1B-1 Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 56 Summary for Subcatchment 17S: Basin 5 - Imp Runoff = 5.42 cfs @ 12.10 hrs, Volume= Routed to Pond 18P : Basin 5 17,925 cf, Depth= 4.98" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-Year Rainfall=5.22" * Area (sf) 26,232 14,605 2,331 43,168 43,168 CN 98 98 98 98 Description Roofs, HSG C 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) 0.6 40 0.0200 1.19 Sheet Flow, Sheet Flow (A-B) Smooth surfaces n= 0.011 P2= 3.47" 1.2 182 2.50 Direct Entry, Pipe Flow (B-C) 1.8 222 Total Sheet Flow (A-B) Subcatchment 17S: Basin 5 - Imp Pipe Flow (B-C)

POA-1 2024-05-12 HydroCad - Proposed POA 1B-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 57 Subcatchment 17S: Basin 5 - Imp Hydrograph 6 Runoff 5.42 cfs NOAA 24-hr D 10-Year Rainfall=5.22" Runoff Area=43,168 sf Runoff Volume=17,925 cf Runoff Depth=4.98" Flow Length=222' Slope=0.0200 '/' Tc=1.8 min CN=98 5 Flow (cfs) 4 3 2 1 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 Time (hours)

POA-1 2024-05-12 HydroCad - Proposed POA 1B-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 17S: Basin 5 - Imp Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 1.00 0.06 0.00 2.00 0.13 0.02 3.00 0.20 0.07 4.00 0.27 0.12 5.00 0.36 0.19 6.00 0.45 0.27 7.00 0.55 0.36 8.00 0.68 0.48 9.00 0.83 0.63 10.00 1.03 0.82 11.00 1.36 1.14 12.00 2.50 2.27 13.00 3.86 3.63 14.00 4.19 3.95 15.00 4.39 4.16 16.00 4.54 4.31 17.00 4.67 4.43 18.00 4.77 4.54 19.00 4.86 4.63 20.00 4.95 4.71 21.00 5.02 4.79 22.00 5.09 4.86 23.00 5.16 4.92 24.00 5.22 4.98 25.00 5.22 4.98 26.00 5.22 4.98 27.00 5.22 4.98 28.00 5.22 4.98 29.00 5.22 4.98 30.00 5.22 4.98 31.00 5.22 4.98 32.00 5.22 4.98 33.00 5.22 4.98 34.00 5.22 4.98 35.00 5.22 4.98 36.00 5.22 4.98 37.00 5.22 4.98 38.00 5.22 4.98 39.00 5.22 4.98 40.00 5.22 4.98 41.00 5.22 4.98 42.00 5.22 4.98 43.00 5.22 4.98 44.00 5.22 4.98 45.00 5.22 4.98 46.00 5.22 4.98 47.00 5.22 4.98 48.00 5.22 4.98 49.00 5.22 4.98 50.00 5.22 4.98 Runoff (cfs) 0.00 0.01 0.03 0.05 0.06 0.07 0.08 0.11 0.13 0.15 0.24 0.43 3.24 0.49 0.25 0.17 0.14 0.12 0.09 0.09 0.08 0.07 0.07 0.06 0.06 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 Time Precip. Excess (hours) (inches) (inches) 51.00 5.22 4.98 52.00 5.22 4.98 53.00 5.22 4.98 54.00 5.22 4.98 55.00 5.22 4.98 56.00 5.22 4.98 57.00 5.22 4.98 58.00 5.22 4.98 59.00 5.22 4.98 60.00 5.22 4.98 61.00 5.22 4.98 62.00 5.22 4.98 63.00 5.22 4.98 64.00 5.22 4.98 65.00 5.22 4.98 66.00 5.22 4.98 67.00 5.22 4.98 68.00 5.22 4.98 69.00 5.22 4.98 70.00 5.22 4.98 71.00 5.22 4.98 72.00 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 Printed 10/25/2024 Page 58

POA-1 2024-05-12 HydroCad - Proposed POA 1B-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 59 Summary for Subcatchment 22S: Basin 6 - Imp Runoff = 6.99 cfs @ 12.11 hrs, Volume= Routed to Pond 24P : Basin 6 23,610 cf, Depth= 4.98" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-Year Rainfall=5.22" * * Area (sf) 16,127 21,053 4,437 15,241 56,858 56,858 CN 98 98 98 98 98 Description Paved parking, HSG D Paved parking, HSG C impervious non pavement fire lane pervoius pavers Weighted Average 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.6 40 0.0200 1.19 Sheet Flow, Sheet Flow (A-B) Smooth surfaces n= 0.011 P2= 3.47" 3.0 450 2.50 Direct Entry, Pipe Flow (B-C) 3.6 490 Total Sheet Flow (A-B) Pipe Flow (B-C) Subcatchment 22S: Basin 6 - Imp