Revised Stormwater Management Report

POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 178 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 31S: Basin 7 - Imp Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 0.80 0.08 0.01 1.60 0.16 0.05 2.40 0.25 0.11 3.20 0.35 0.19 4.00 0.45 0.28 4.80 0.56 0.38 5.60 0.68 0.48 6.40 0.80 0.60 7.20 0.95 0.74 8.00 1.12 0.91 8.80 1.32 1.10 9.60 1.56 1.34 10.40 1.89 1.67 11.20 2.42 2.19 12.00 4.15 3.91 12.80 6.24 6.00 13.60 6.77 6.53 14.40 7.10 6.86 15.20 7.34 7.10 16.00 7.54 7.30 16.80 7.71 7.47 17.60 7.86 7.62 18.40 7.98 7.74 19.20 8.10 7.86 20.00 8.21 7.97 20.80 8.31 8.07 21.60 8.41 8.17 22.40 8.50 8.26 23.20 8.58 8.34 24.00 8.66 8.42 24.80 8.66 8.42 25.60 8.66 8.42 26.40 8.66 8.42 27.20 8.66 8.42 28.00 8.66 8.42 28.80 8.66 8.42 29.60 8.66 8.42 30.40 8.66 8.42 31.20 8.66 8.42 32.00 8.66 8.42 32.80 8.66 8.42 33.60 8.66 8.42 34.40 8.66 8.42 35.20 8.66 8.42 36.00 8.66 8.42 36.80 8.66 8.42 37.60 8.66 8.42 38.40 8.66 8.42 39.20 8.66 8.42 40.00 8.66 8.42 Runoff (cfs) 0.00 0.02 0.06 0.09 0.11 0.13 0.14 0.15 0.17 0.20 0.24 0.27 0.35 0.47 0.84 3.24 1.25 0.59 0.41 0.30 0.26 0.22 0.19 0.16 0.15 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 Time Precip. Excess (hours) (inches)

41 0.30 0.26 0.22 0.19 0.16 0.15 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 Time Precip. Excess (hours) (inches) (inches) 40.80 8.66 8.42 41.60 8.66 8.42 42.40 8.66 8.42 43.20 8.66 8.42 44.00 8.66 8.42 44.80 8.66 8.42 45.60 8.66 8.42 46.40 8.66 8.42 47.20 8.66 8.42 48.00 8.66 8.42 48.80 8.66 8.42 49.60 8.66 8.42 50.40 8.66 8.42 51.20 8.66 8.42 52.00 8.66 8.42 52.80 8.66 8.42 53.60 8.66 8.42 54.40 8.66 8.42 55.20 8.66 8.42 56.00 8.66 8.42 56.80 8.66 8.42 57.60 8.66 8.42 58.40 8.66 8.42 59.20 8.66 8.42 60.00 8.66 8.42 60.80 8.66 8.42 61.60 8.66 8.42 62.40 8.66 8.42 63.20 8.66 8.42 64.00 8.66 8.42 64.80 8.66 8.42 65.60 8.66 8.42 66.40 8.66 8.42 67.20 8.66 8.42 68.00 8.66 8.42 68.80 8.66 8.42 69.60 8.66 8.42 70.40 8.66 8.42 71.20 8.66 8.42 72.00 8.66 8.42 72.80 8.66 8.42 73.60 8.66 8.42 74.40 8.66 8.42 75.20 8.66 8.42 76.00 8.66 8.42 76.80 8.66 8.42 77.60 8.66 8.42 78.40 8.66 8.42 79.20 8.66 8.42 80.00 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 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 179 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 32S: Basin 7 - Perv Runoff = 7.37 cfs @ 12.20 hrs, Volume= Routed to Pond 49P : Basin 7 29,453 cf, Depth= 5.88" 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 100-Year Rainfall=8.66" 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 Runoff 8 7.37 cfs 7 6 Flow (cfs) 5 4 3 NOAA 24-hr D 100-Year Rainfall=8.66" Runoff Area=60,077 sf Runoff Volume=29,453 cf Runoff Depth=5.88" Flow Length=760' Tc=12.5 min CN=77 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 74 76 78 80 Time (hours)

POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 180 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 0.08 0.00 1.60 0.16 0.00 2.40 0.25 0.00 3.20 0.35 0.00 4.00 0.45 0.00 4.80 0.56 0.00 5.60 0.68 0.00 6.40 0.80 0.01 7.20 0.95 0.04 8.00 1.12 0.08 8.80 1.32 0.14 9.60 1.56 0.24 10.40 1.89 0.39 11.20 2.42 0.69 12.00 4.15 1.93 12.80 6.24 3.69 13.60 6.77 4.16 14.40 7.10 4.45 15.20 7.34 4.67 16.00 7.54 4.85 16.80 7.71 5.01 17.60 7.86 5.14 18.40 7.98 5.26 19.20 8.10 5.36 20.00 8.21 5.46 20.80 8.31 5.56 21.60 8.41 5.65 22.40 8.50 5.73 23.20 8.58 5.81 24.00 8.66 5.88 24.80 8.66 5.88 25.60 8.66 5.88 26.40 8.66 5.88 27.20 8.66 5.88 28.00 8.66 5.88 28.80 8.66 5.88 29.60 8.66 5.88 30.40 8.66 5.88 31.20 8.66 5.88 32.00 8.66 5.88 32.80 8.66 5.88 33.60 8.66 5.88 34.40 8.66 5.88 35.20 8.66 5.88 36.00 8.66 5.88 36.80 8.66 5.88 37.60 8.66 5.88 38.40 8.66 5.88 39.20 8.66 5.88 40.00 8.66 5.88 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.05 0.08 0.12 0.19 0.30 0.64 3.07 1.41 0.68 0.48 0.35 0.30 0.26 0.22 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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)

48 0.35 0.30 0.26 0.22 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 8.66 5.88 41.60 8.66 5.88 42.40 8.66 5.88 43.20 8.66 5.88 44.00 8.66 5.88 44.80 8.66 5.88 45.60 8.66 5.88 46.40 8.66 5.88 47.20 8.66 5.88 48.00 8.66 5.88 48.80 8.66 5.88 49.60 8.66 5.88 50.40 8.66 5.88 51.20 8.66 5.88 52.00 8.66 5.88 52.80 8.66 5.88 53.60 8.66 5.88 54.40 8.66 5.88 55.20 8.66 5.88 56.00 8.66 5.88 56.80 8.66 5.88 57.60 8.66 5.88 58.40 8.66 5.88 59.20 8.66 5.88 60.00 8.66 5.88 60.80 8.66 5.88 61.60 8.66 5.88 62.40 8.66 5.88 63.20 8.66 5.88 64.00 8.66 5.88 64.80 8.66 5.88 65.60 8.66 5.88 66.40 8.66 5.88 67.20 8.66 5.88 68.00 8.66 5.88 68.80 8.66 5.88 69.60 8.66 5.88 70.40 8.66 5.88 71.20 8.66 5.88 72.00 8.66 5.88 72.80 8.66 5.88 73.60 8.66 5.88 74.40 8.66 5.88 75.20 8.66 5.88 76.00 8.66 5.88 76.80 8.66 5.88 77.60 8.66 5.88 78.40 8.66 5.88 79.20 8.66 5.88 80.00 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 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 181 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 35S: DA 2 Und - Imp Runoff = 8.88 cfs @ 12.16 hrs, Volume= Routed to Link 34L : DA 2 Undetained 36,846 cf, Depth= 8.42" 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 100-Year Rainfall=8.66" 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 9 8 7 Flow (cfs) 6 5 4 3 2 8.88 cfs NOAA 24-hr D 100-Year Rainfall=8.66" Runoff Area=52,513 sf Runoff Volume=36,846 cf Runoff Depth=8.42" 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 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 182 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 0.08 0.01 1.60 0.16 0.05 2.40 0.25 0.11 3.20 0.35 0.19 4.00 0.45 0.28 4.80 0.56 0.38 5.60 0.68 0.48 6.40 0.80 0.60 7.20 0.95 0.74 8.00 1.12 0.91 8.80 1.32 1.10 9.60 1.56 1.34 10.40 1.89 1.67 11.20 2.42 2.19 12.00 4.15 3.91 12.80 6.24 6.00 13.60 6.77 6.53 14.40 7.10 6.86 15.20 7.34 7.10 16.00 7.54 7.30 16.80 7.71 7.47 17.60 7.86 7.62 18.40 7.98 7.74 19.20 8.10 7.86 20.00 8.21 7.97 20.80 8.31 8.07 21.60 8.41 8.17 22.40 8.50 8.26 23.20 8.58 8.34 24.00 8.66 8.42 24.80 8.66 8.42 25.60 8.66 8.42 26.40 8.66 8.42 27.20 8.66 8.42 28.00 8.66 8.42 28.80 8.66 8.42 29.60 8.66 8.42 30.40 8.66 8.42 31.20 8.66 8.42 32.00 8.66 8.42 32.80 8.66 8.42 33.60 8.66 8.42 34.40 8.66 8.42 35.20 8.66 8.42 36.00 8.66 8.42 36.80 8.66 8.42 37.60 8.66 8.42 38.40 8.66 8.42 39.20 8.66 8.42 40.00 8.66 8.42 Runoff (cfs) 0.00 0.02 0.07 0.10 0.13 0.14 0.15 0.17 0.19 0.23 0.27 0.31 0.40 0.54 0.99 4.42 1.31 0.63 0.46 0.33 0.29 0.25 0.21 0.18 0.17 0.16 0.15 0.14 0.13 0.13 0.12 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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)

46 0.33 0.29 0.25 0.21 0.18 0.17 0.16 0.15 0.14 0.13 0.13 0.12 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 8.66 8.42 41.60 8.66 8.42 42.40 8.66 8.42 43.20 8.66 8.42 44.00 8.66 8.42 44.80 8.66 8.42 45.60 8.66 8.42 46.40 8.66 8.42 47.20 8.66 8.42 48.00 8.66 8.42 48.80 8.66 8.42 49.60 8.66 8.42 50.40 8.66 8.42 51.20 8.66 8.42 52.00 8.66 8.42 52.80 8.66 8.42 53.60 8.66 8.42 54.40 8.66 8.42 55.20 8.66 8.42 56.00 8.66 8.42 56.80 8.66 8.42 57.60 8.66 8.42 58.40 8.66 8.42 59.20 8.66 8.42 60.00 8.66 8.42 60.80 8.66 8.42 61.60 8.66 8.42 62.40 8.66 8.42 63.20 8.66 8.42 64.00 8.66 8.42 64.80 8.66 8.42 65.60 8.66 8.42 66.40 8.66 8.42 67.20 8.66 8.42 68.00 8.66 8.42 68.80 8.66 8.42 69.60 8.66 8.42 70.40 8.66 8.42 71.20 8.66 8.42 72.00 8.66 8.42 72.80 8.66 8.42 73.60 8.66 8.42 74.40 8.66 8.42 75.20 8.66 8.42 76.00 8.66 8.42 76.80 8.66 8.42 77.60 8.66 8.42 78.40 8.66 8.42 79.20 8.66 8.42 80.00 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 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 183 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 36S: DA 2 Und - Perv Runoff = 17.13 cfs @ 12.16 hrs, Volume= Routed to Link 34L : DA 2 Undetained 61,351 cf, Depth= 5.88" 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 100-Year Rainfall=8.66" 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 19 18 17 16 15 14 13 Flow (cfs) 12 11 10 9 8 7 6 5 4 Runoff 17.13 cfs NOAA 24-hr D 100-Year Rainfall=8.66" Runoff Area=125,142 sf Runoff Volume=61,351 cf Runoff Depth=5.88" Flow Length=160' Slope=0.0600 '/' Tc=9.1 min CN=77 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 74 76 78 80 Time (hours)

POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 184 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 0.08 0.00 1.60 0.16 0.00 2.40 0.25 0.00 3.20 0.35 0.00 4.00 0.45 0.00 4.80 0.56 0.00 5.60 0.68 0.00 6.40 0.80 0.01 7.20 0.95 0.04 8.00 1.12 0.08 8.80 1.32 0.14 9.60 1.56 0.24 10.40 1.89 0.39 11.20 2.42 0.69 12.00 4.15 1.93 12.80 6.24 3.69 13.60 6.77 4.16 14.40 7.10 4.45 15.20 7.34 4.67 16.00 7.54 4.85 16.80 7.71 5.01 17.60 7.86 5.14 18.40 7.98 5.26 19.20 8.10 5.36 20.00 8.21 5.46 20.80 8.31 5.56 21.60 8.41 5.65 22.40 8.50 5.73 23.20 8.58 5.81 24.00 8.66 5.88 24.80 8.66 5.88 25.60 8.66 5.88 26.40 8.66 5.88 27.20 8.66 5.88 28.00 8.66 5.88 28.80 8.66 5.88 29.60 8.66 5.88 30.40 8.66 5.88 31.20 8.66 5.88 32.00 8.66 5.88 32.80 8.66 5.88 33.60 8.66 5.88 34.40 8.66 5.88 35.20 8.66 5.88 36.00 8.66 5.88 36.80 8.66 5.88 37.60 8.66 5.88 38.40 8.66 5.88 39.20 8.66 5.88 40.00 8.66 5.88 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.05 0.11 0.17 0.25 0.41 0.65 1.42 7.91 2.73 1.34 0.98 0.71 0.62 0.54 0.46 0.40 0.38 0.36 0.34 0.32 0.30 0.28 0.26 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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)