complete drainage report rev 9

POA-1 2024-05-12 HydroCad - Proposed POA 1B-1 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 99 Subcatchment 17S: Basin 5 - Imp Hydrograph 10 Runoff 9.01 cfs NOAA 24-hr D 100-Year Rainfall=8.66" Runoff Area=43,168 sf Runoff Volume=30,289 cf Runoff Depth=8.42" Flow Length=222' Slope=0.0200 '/' Tc=1.8 min CN=98 9 8 Flow (cfs) 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 100-Year Rainfall=8.66" 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 0.10 0.01 2.00 0.21 0.08 3.00 0.33 0.17 4.00 0.45 0.28 5.00 0.59 0.40 6.00 0.74 0.54 7.00 0.91 0.71 8.00 1.12 0.91 9.00 1.37 1.16 10.00 1.72 1.49 11.00 2.25 2.02 12.00 4.15 3.91 13.00 6.41 6.17 14.00 6.94 6.70 15.00 7.29 7.05 16.00 7.54 7.30 17.00 7.75 7.51 18.00 7.92 7.68 19.00 8.07 7.83 20.00 8.21 7.97 21.00 8.33 8.09 22.00 8.45 8.21 23.00 8.56 8.32 24.00 8.66 8.42 25.00 8.66 8.42 26.00 8.66 8.42 27.00 8.66 8.42 28.00 8.66 8.42 29.00 8.66 8.42 30.00 8.66 8.42 31.00 8.66 8.42 32.00 8.66 8.42 33.00 8.66 8.42 34.00 8.66 8.42 35.00 8.66 8.42 36.00 8.66 8.42 37.00 8.66 8.42 38.00 8.66 8.42 39.00 8.66 8.42 40.00 8.66 8.42 41.00 8.66 8.42 42.00 8.66 8.42 43.00 8.66 8.42 44.00 8.66 8.42 45.00 8.66 8.42 46.00 8.66 8.42 47.00 8.66 8.42 48.00 8.66 8.42 49.00 8.66 8.42 50.00 8.66 8.42 Runoff (cfs) 0.00 0.04 0.08 0.10 0.12 0.13 0.14 0.18 0.22 0.26 0.40 0.72 5.40 0.81 0.42 0.28 0.23 0.19 0.16 0.14 0.13 0.12 0.11 0.10 0.10 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 8.66 8.42 52.00 8.66 8.42 53.00 8.66 8.42 54.00 8.66 8.42 55.00 8.66 8.42 56.00 8.66 8.42 57.00 8.66 8.42 58.00 8.66 8.42 59.00 8.66 8.42 60.00 8.66 8.42 61.00 8.66 8.42 62.00 8.66 8.42 63.00 8.66 8.42 64.00 8.66 8.42 65.00 8.66 8.42 66.00 8.66 8.42 67.00 8.66 8.42 68.00 8.66 8.42 69.00 8.66 8.42 70.00 8.66 8.42 71.00 8.66 8.42 72.00 8.66 8.42 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 100

POA-1 2024-05-12 HydroCad - Proposed POA 1B-1 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 101 Summary for Subcatchment 22S: Basin 6 - Imp Runoff = 11.63 cfs @ 12.11 hrs, Volume= Routed to Pond 24P : Basin 6 39,895 cf, Depth= 8.42" 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 100-Year Rainfall=8.66" * * 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

POA-1 2024-05-12 HydroCad - Proposed POA 1B-1 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 102 Subcatchment 22S: Basin 6 - Imp Hydrograph 13 Runoff 11.63 cfs 12 NOAA 24-hr D 100-Year Rainfall=8.66" Runoff Area=56,858 sf Runoff Volume=39,895 cf Runoff Depth=8.42" Flow Length=490' Slope=0.0200 '/' Tc=3.6 min CN=98 11 10 9 Flow (cfs) 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 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 22S: Basin 6 - Imp Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 1.00 0.10 0.01 2.00 0.21 0.08 3.00 0.33 0.17 4.00 0.45 0.28 5.00 0.59 0.40 6.00 0.74 0.54 7.00 0.91 0.71 8.00 1.12 0.91 9.00 1.37 1.16 10.00 1.72 1.49 11.00 2.25 2.02 12.00 4.15 3.91 13.00 6.41 6.17 14.00 6.94 6.70 15.00 7.29 7.05 16.00 7.54 7.30 17.00 7.75 7.51 18.00 7.92 7.68 19.00 8.07 7.83 20.00 8.21 7.97 21.00 8.33 8.09 22.00 8.45 8.21 23.00 8.56 8.32 24.00 8.66 8.42 25.00 8.66 8.42 26.00 8.66 8.42 27.00 8.66 8.42 28.00 8.66 8.42 29.00 8.66 8.42 30.00 8.66 8.42 31.00 8.66 8.42 32.00 8.66 8.42 33.00 8.66 8.42 34.00 8.66 8.42 35.00 8.66 8.42 36.00 8.66 8.42 37.00 8.66 8.42 38.00 8.66 8.42 39.00 8.66 8.42 40.00 8.66 8.42 41.00 8.66 8.42 42.00 8.66 8.42 43.00 8.66 8.42 44.00 8.66 8.42 45.00 8.66 8.42 46.00 8.66 8.42 47.00 8.66 8.42 48.00 8.66 8.42 49.00 8.66 8.42 50.00 8.66 8.42 Runoff (cfs) 0.00 0.05 0.10 0.13 0.15 0.17 0.19 0.24 0.29 0.35 0.52 0.94 6.91 1.08 0.55 0.37 0.31 0.26 0.21 0.19 0.18 0.16 0.15 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 8.66 8.42 52.00 8.66 8.42 53.00 8.66 8.42 54.00 8.66 8.42 55.00 8.66 8.42 56.00 8.66 8.42 57.00 8.66 8.42 58.00 8.66 8.42 59.00 8.66 8.42 60.00 8.66 8.42 61.00 8.66 8.42 62.00 8.66 8.42 63.00 8.66 8.42 64.00 8.66 8.42 65.00 8.66 8.42 66.00 8.66 8.42 67.00 8.66 8.42 68.00 8.66 8.42 69.00 8.66 8.42 70.00 8.66 8.42 71.00 8.66 8.42 72.00 8.66 8.42 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 103

POA-1 NOAA 24-hr D 100-Year Rainfall=8.66" 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 104 Summary for Subcatchment 23S: Basin 6 - Perv Runoff = 8.16 cfs @ 12.11 hrs, Volume= Routed to Pond 24P : Basin 6 23,561 cf, Depth= 5.52" 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 100-Year Rainfall=8.66" Area (sf) 51,219 51,219 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) 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 23S: Basin 6 - Perv Subcatchment 23S: Basin 6 - Perv Hydrograph 9 Runoff 8.16 cfs NOAA 24-hr D 100-Year Rainfall=8.66" Runoff Area=51,219 sf Runoff Volume=23,561 cf Runoff Depth=5.52" Flow Length=490' Slope=0.0200 '/' Tc=3.6 min CN=74 8 7 Flow (cfs) 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 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 23S: Basin 6 - Perv Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 1.00 0.10 0.00 2.00 0.21 0.00 3.00 0.33 0.00 4.00 0.45 0.00 5.00 0.59 0.00 6.00 0.74 0.00 7.00 0.91 0.01 8.00 1.12 0.05 9.00 1.37 0.11 10.00 1.72 0.23 11.00 2.25 0.47 12.00 4.15 1.71 13.00 6.41 3.53 14.00 6.94 3.99 15.00 7.29 4.29 16.00 7.54 4.51 17.00 7.75 4.70 18.00 7.92 4.85 19.00 8.07 4.99 20.00 8.21 5.11 21.00 8.33 5.23 22.00 8.45 5.33 23.00 8.56 5.43 24.00 8.66 5.52 25.00 8.66 5.52 26.00 8.66 5.52 27.00 8.66 5.52 28.00 8.66 5.52 29.00 8.66 5.52 30.00 8.66 5.52 31.00 8.66 5.52 32.00 8.66 5.52 33.00 8.66 5.52 34.00 8.66 5.52 35.00 8.66 5.52 36.00 8.66 5.52 37.00 8.66 5.52 38.00 8.66 5.52 39.00 8.66 5.52 40.00 8.66 5.52 41.00 8.66 5.52 42.00 8.66 5.52 43.00 8.66 5.52 44.00 8.66 5.52 45.00 8.66 5.52 46.00 8.66 5.52 47.00 8.66 5.52 48.00 8.66 5.52 49.00 8.66 5.52 50.00 8.66 5.52 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.05 0.09 0.19 0.44 4.51 0.83 0.43 0.29 0.24 0.20 0.17 0.15 0.14 0.13 0.12 0.11 0.10 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 8.66 5.52 52.00 8.66 5.52 53.00 8.66 5.52 54.00 8.66 5.52 55.00 8.66 5.52 56.00 8.66 5.52 57.00 8.66 5.52 58.00 8.66 5.52 59.00 8.66 5.52 60.00 8.66 5.52 61.00 8.66 5.52 62.00 8.66 5.52 63.00 8.66 5.52 64.00 8.66 5.52 65.00 8.66 5.52 66.00 8.66 5.52 67.00 8.66 5.52 68.00 8.66 5.52 69.00 8.66 5.52 70.00 8.66 5.52 71.00 8.66 5.52 72.00 8.66 5.52 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 105

POA-1 2024-05-12 HydroCad - Proposed POA 1B-1 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 106 Summary for Subcatchment 26S: DA 1 Und - Perv Runoff = 9.65 cfs @ 12.14 hrs, Volume= Routed to Link 25L : POA 1 31,713 cf, Depth= 5.88" 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 100-Year Rainfall=8.66" Area (sf) 31,523 33,164 64,687 64,687 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) 6.9 100 0.1100 0.24 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" 0.2 50 0.1100 5.34 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps 7.1 150 Total Sheet Flow (A-B) Subcatchment 26S: DA(B-C) 1 Und - Perv SCF

POA-1 2024-05-12 HydroCad - Proposed POA 1B-1 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 107 Subcatchment 26S: DA 1 Und - Perv Hydrograph Runoff 9.65 cfs 10 NOAA 24-hr D 100-Year Rainfall=8.66" Runoff Area=64,687 sf Runoff Volume=31,713 cf Runoff Depth=5.88" Flow Length=150' Slope=0.1100 '/' Tc=7.1 min CN=77 9 8 Flow (cfs) 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 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 26S: DA 1 Und - Perv Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 1.00 0.10 0.00 2.00 0.21 0.00 3.00 0.33 0.00 4.00 0.45 0.00 5.00 0.59 0.00 6.00 0.74 0.01 7.00 0.91 0.03 8.00 1.12 0.08 9.00 1.37 0.16 10.00 1.72 0.31 11.00 2.25 0.59 12.00 4.15 1.93 13.00 6.41 3.84 14.00 6.94 4.31 15.00 7.29 4.62 16.00 7.54 4.85 17.00 7.75 5.04 18.00 7.92 5.20 19.00 8.07 5.34 20.00 8.21 5.46 21.00 8.33 5.58 22.00 8.45 5.69 23.00 8.56 5.79 24.00 8.66 5.88 25.00 8.66 5.88 26.00 8.66 5.88 27.00 8.66 5.88 28.00 8.66 5.88 29.00 8.66 5.88 30.00 8.66 5.88 31.00 8.66 5.88 32.00 8.66 5.88 33.00 8.66 5.88 34.00 8.66 5.88 35.00 8.66 5.88 36.00 8.66 5.88 37.00 8.66 5.88 38.00 8.66 5.88 39.00 8.66 5.88 40.00 8.66 5.88 41.00 8.66 5.88 42.00 8.66 5.88 43.00 8.66 5.88 44.00 8.66 5.88 45.00 8.66 5.88 46.00 8.66 5.88 47.00 8.66 5.88 48.00 8.66 5.88 49.00 8.66 5.88 50.00 8.66 5.88 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.05 0.09 0.14 0.27 0.59 4.77 1.14 0.57 0.39 0.32 0.27 0.22 0.20 0.18 0.17 0.16 0.15 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 8.66 5.88 52.00 8.66 5.88 53.00 8.66 5.88 54.00 8.66 5.88 55.00 8.66 5.88 56.00 8.66 5.88 57.00 8.66 5.88 58.00 8.66 5.88 59.00 8.66 5.88 60.00 8.66 5.88 61.00 8.66 5.88 62.00 8.66 5.88 63.00 8.66 5.88 64.00 8.66 5.88 65.00 8.66 5.88 66.00 8.66 5.88 67.00 8.66 5.88 68.00 8.66 5.88 69.00 8.66 5.88 70.00 8.66 5.88 71.00 8.66 5.88 72.00 8.66 5.88 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 108