Revised Stormwater Management Report

POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 99 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 32S: Basin 7 - Perv Runoff = 3.58 cfs @ 12.20 hrs, Volume= Routed to Pond 49P : Basin 7 14,058 cf, Depth= 2.81" 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) 25,517 34,560 60,077 60,077 Tc (min) 8.9 Length (feet) 83 1.1 272 0.1 40 2.4 12.5 365 760 CN 80 74 77 Description >75% Grass cover, Good, HSG D >75% Grass cover, Good, HSG C Weighted Average 100.00% Pervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0400 0.15 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" Using McCuen-Spiess flow length 0.0600 3.94 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps 0.0670 5.25 Shallow Concentrated Flow, SCF (C-D) Paved Kv= 20.3 fps 2.50 Direct Entry, Pipe Flow Total Subcatchment 32S: Basin 7 - Perv Hydrograph 4 Runoff 3.58 cfs Flow (cfs) 3 2 NOAA 24-hr D 10-Year Rainfall=5.22" Runoff Area=60,077 sf Runoff Volume=14,058 cf Runoff Depth=2.81" Flow Length=760' Tc=12.5 min CN=77 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 74 76 78 80 Time (hours)

POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 100 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 32S: Basin 7 - Perv 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 0.01 9.60 0.94 0.04 10.40 1.14 0.08 11.20 1.46 0.19 12.00 2.50 0.74 12.80 3.76 1.63 13.60 4.08 1.87 14.40 4.28 2.03 15.20 4.42 2.15 16.00 4.54 2.25 16.80 4.65 2.33 17.60 4.74 2.40 18.40 4.81 2.47 19.20 4.88 2.52 20.00 4.95 2.58 20.80 5.01 2.63 21.60 5.07 2.68 22.40 5.12 2.73 23.20 5.17 2.77 24.00 5.22 2.81 24.80 5.22 2.81 25.60 5.22 2.81 26.40 5.22 2.81 27.20 5.22 2.81 28.00 5.22 2.81 28.80 5.22 2.81 29.60 5.22 2.81 30.40 5.22 2.81 31.20 5.22 2.81 32.00 5.22 2.81 32.80 5.22 2.81 33.60 5.22 2.81 34.40 5.22 2.81 35.20 5.22 2.81 36.00 5.22 2.81 36.80 5.22 2.81 37.60 5.22 2.81 38.40 5.22 2.81 39.20 5.22 2.81 40.00 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 0.01 0.02 0.05 0.10 0.24 1.38 0.73 0.36 0.26 0.19 0.16 0.14 0.12 0.10 0.10 0.09 0.09 0.08 0.08 0.07 0.07 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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)

26 0.19 0.16 0.14 0.12 0.10 0.10 0.09 0.09 0.08 0.08 0.07 0.07 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 2.81 41.60 5.22 2.81 42.40 5.22 2.81 43.20 5.22 2.81 44.00 5.22 2.81 44.80 5.22 2.81 45.60 5.22 2.81 46.40 5.22 2.81 47.20 5.22 2.81 48.00 5.22 2.81 48.80 5.22 2.81 49.60 5.22 2.81 50.40 5.22 2.81 51.20 5.22 2.81 52.00 5.22 2.81 52.80 5.22 2.81 53.60 5.22 2.81 54.40 5.22 2.81 55.20 5.22 2.81 56.00 5.22 2.81 56.80 5.22 2.81 57.60 5.22 2.81 58.40 5.22 2.81 59.20 5.22 2.81 60.00 5.22 2.81 60.80 5.22 2.81 61.60 5.22 2.81 62.40 5.22 2.81 63.20 5.22 2.81 64.00 5.22 2.81 64.80 5.22 2.81 65.60 5.22 2.81 66.40 5.22 2.81 67.20 5.22 2.81 68.00 5.22 2.81 68.80 5.22 2.81 69.60 5.22 2.81 70.40 5.22 2.81 71.20 5.22 2.81 72.00 5.22 2.81 72.80 5.22 2.81 73.60 5.22 2.81 74.40 5.22 2.81 75.20 5.22 2.81 76.00 5.22 2.81 76.80 5.22 2.81 77.60 5.22 2.81 78.40 5.22 2.81 79.20 5.22 2.81 80.00 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 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 101 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 35S: DA 2 Und - Imp Runoff = 5.34 cfs @ 12.16 hrs, Volume= Routed to Link 34L : DA 2 Undetained 21,805 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) 19,504 33,009 52,513 52,513 Tc (min) 8.8 Length (feet) 100 0.3 60 9.1 160 CN 98 98 98 Description Paved parking, HSG C Paved parking, HSG D Weighted Average 100.00% Impervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0600 0.19 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" 0.0600 3.94 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps Total Subcatchment 35S: DA 2 Und - Imp Hydrograph Runoff 5.34 cfs 5 Flow (cfs) 4 3 2 NOAA 24-hr D 10-Year Rainfall=5.22" Runoff Area=52,513 sf Runoff Volume=21,805 cf Runoff Depth=4.98" Flow Length=160' Slope=0.0600 '/' Tc=9.1 min CN=98 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 74 76 78 80 Time (hours)

POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 102 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 35S: DA 2 Und - 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 0.03 0.05 0.06 0.07 0.08 0.09 0.11 0.13 0.15 0.18 0.24 0.32 0.59 2.65 0.79 0.38 0.27 0.20 0.17 0.15 0.13 0.11 0.10 0.10 0.09 0.09 0.08 0.08 0.07 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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)

27 0.20 0.17 0.15 0.13 0.11 0.10 0.10 0.09 0.09 0.08 0.08 0.07 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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

POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 103 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 36S: DA 2 Und - Perv Runoff = 8.34 cfs @ 12.16 hrs, Volume= Routed to Link 34L : DA 2 Undetained 29,284 cf, Depth= 2.81" 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) 57,417 67,725 125,142 125,142 Tc (min) 8.8 Length (feet) 100 0.3 60 9.1 160 CN 80 74 77 Description >75% Grass cover, Good, HSG D >75% Grass cover, Good, HSG C Weighted Average 100.00% Pervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0600 0.19 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" 0.0600 3.94 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps Total Subcatchment 36S: DA 2 Und - Perv Hydrograph Runoff 9 8.34 cfs 8 7 Flow (cfs) 6 5 4 3 2 NOAA 24-hr D 10-Year Rainfall=5.22" Runoff Area=125,142 sf Runoff Volume=29,284 cf Runoff Depth=2.81" Flow Length=160' Slope=0.0600 '/' Tc=9.1 min CN=77 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 74 76 78 80 Time (hours)

POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 104 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 36S: DA 2 Und - Perv 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 0.01 9.60 0.94 0.04 10.40 1.14 0.08 11.20 1.46 0.19 12.00 2.50 0.74 12.80 3.76 1.63 13.60 4.08 1.87 14.40 4.28 2.03 15.20 4.42 2.15 16.00 4.54 2.25 16.80 4.65 2.33 17.60 4.74 2.40 18.40 4.81 2.47 19.20 4.88 2.52 20.00 4.95 2.58 20.80 5.01 2.63 21.60 5.07 2.68 22.40 5.12 2.73 23.20 5.17 2.77 24.00 5.22 2.81 24.80 5.22 2.81 25.60 5.22 2.81 26.40 5.22 2.81 27.20 5.22 2.81 28.00 5.22 2.81 28.80 5.22 2.81 29.60 5.22 2.81 30.40 5.22 2.81 31.20 5.22 2.81 32.00 5.22 2.81 32.80 5.22 2.81 33.60 5.22 2.81 34.40 5.22 2.81 35.20 5.22 2.81 36.00 5.22 2.81 36.80 5.22 2.81 37.60 5.22 2.81 38.40 5.22 2.81 39.20 5.22 2.81 40.00 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 0.02 0.05 0.11 0.21 0.54 3.61 1.42 0.71 0.52 0.38 0.34 0.29 0.25 0.22 0.21 0.20 0.18 0.17 0.16 0.15 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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)

52 0.38 0.34 0.29 0.25 0.22 0.21 0.20 0.18 0.17 0.16 0.15 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 2.81 41.60 5.22 2.81 42.40 5.22 2.81 43.20 5.22 2.81 44.00 5.22 2.81 44.80 5.22 2.81 45.60 5.22 2.81 46.40 5.22 2.81 47.20 5.22 2.81 48.00 5.22 2.81 48.80 5.22 2.81 49.60 5.22 2.81 50.40 5.22 2.81 51.20 5.22 2.81 52.00 5.22 2.81 52.80 5.22 2.81 53.60 5.22 2.81 54.40 5.22 2.81 55.20 5.22 2.81 56.00 5.22 2.81 56.80 5.22 2.81 57.60 5.22 2.81 58.40 5.22 2.81 59.20 5.22 2.81 60.00 5.22 2.81 60.80 5.22 2.81 61.60 5.22 2.81 62.40 5.22 2.81 63.20 5.22 2.81 64.00 5.22 2.81 64.80 5.22 2.81 65.60 5.22 2.81 66.40 5.22 2.81 67.20 5.22 2.81 68.00 5.22 2.81 68.80 5.22 2.81 69.60 5.22 2.81 70.40 5.22 2.81 71.20 5.22 2.81 72.00 5.22 2.81 72.80 5.22 2.81 73.60 5.22 2.81 74.40 5.22 2.81 75.20 5.22 2.81 76.00 5.22 2.81 76.80 5.22 2.81 77.60 5.22 2.81 78.40 5.22 2.81 79.20 5.22 2.81 80.00 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 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 105 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 45S: Basin 11 - Imp Runoff = 6.48 cfs @ 12.17 hrs, Volume= Routed to Pond 33P : Basin 11 27,085 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) 4,356 7,377 27,007 26,489 65,229 65,229 Tc (min) 8.9 Length (feet) 83 0.9 150 9.8 233 CN 98 98 98 98 98 Description Roofs, HSG D Paved parking, HSG D Roofs, HSG C Paved parking, HSG C Weighted Average 100.00% Impervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0400 0.15 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" Using McCuen-Spiess flow length 0.0330 2.92 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps Total Subcatchment 45S: Basin 11 - Imp Hydrograph Runoff 7 6.48 cfs 6 Flow (cfs) 5 4 3 2 NOAA 24-hr D 10-Year Rainfall=5.22" Runoff Area=65,229 sf Runoff Volume=27,085 cf Runoff Depth=4.98" Flow Length=233' Tc=9.8 min CN=98 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 74 76 78 80 Time (hours)