Revised Stormwater Management Report

POA 1 proposed 2024-05-12 HydroCad - Proposed POA 1 Multi-Event Tables Prepared by Anderson Consulting Services Printed 6/29/2024 Page 135 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Events for Link 25L: POA 1 Event Inflow (cfs) Primary (cfs) Elevation (feet) 2-Year 10-Year 100-Year WQ 2.46 5.08 10.89 0.43 2.46 5.08 10.89 0.43 0.00 0.00 0.00 0.00

POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 1 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 19S: Basin 3 - Imp Runoff = 2.22 cfs @ 12.15 hrs, Volume= Routed to Pond 21P : Basin 3 8,665 cf, Depth= 3.21" 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 2-Year Rainfall=3.44" Area (sf) 6,970 18,295 7,163 32,428 32,428 Tc (min) 8.3 Length (feet) 75 CN 98 98 98 98 Description Roofs, 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" Subcatchment 19S: Basin 3 - Imp Hydrograph Runoff 2.22 cfs Flow (cfs) 2 1 0 NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=32,428 sf Runoff Volume=8,665 cf Runoff Depth=3.21" Flow Length=75' Slope=0.0400 '/' Tc=8.3 min CN=98 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 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 2 HydroCAD® 10.20-5a 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 0.03 0.00 1.60 0.06 0.00 2.40 0.10 0.01 3.20 0.14 0.03 4.00 0.18 0.06 4.80 0.22 0.09 5.60 0.27 0.12 6.40 0.32 0.16 7.20 0.38 0.21 8.00 0.45 0.27 8.80 0.52 0.34 9.60 0.62 0.43 10.40 0.75 0.55 11.20 0.96 0.75 12.00 1.65 1.43 12.80 2.48 2.25 13.60 2.69 2.46 14.40 2.82 2.59 15.20 2.92 2.68 16.00 2.99 2.76 16.80 3.06 2.83 17.60 3.12 2.89 18.40 3.17 2.94 19.20 3.22 2.98 20.00 3.26 3.03 20.80 3.30 3.07 21.60 3.34 3.11 22.40 3.38 3.14 23.20 3.41 3.18 24.00 3.44 3.21 24.80 3.44 3.21 25.60 3.44 3.21 26.40 3.44 3.21 27.20 3.44 3.21 28.00 3.44 3.21 28.80 3.44 3.21 29.60 3.44 3.21 30.40 3.44 3.21 31.20 3.44 3.21 32.00 3.44 3.21 32.80 3.44 3.21 33.60 3.44 3.21 34.40 3.44 3.21 35.20 3.44 3.21 36.00 3.44 3.21 36.80 3.44 3.21 37.60 3.44 3.21 38.40 3.44 3.21 39.20 3.44 3.21 40.00 3.44 3.21 Runoff (cfs) 0.00 0.00 0.01 0.01 0.02 0.02 0.03 0.03 0.04 0.05 0.06 0.07 0.09 0.13 0.24 1.13 0.31 0.15 0.11 0.08 0.07 0.06 0.05 0.04 0.04 0.04 0.04 0.04 0.03 0.03 0.03 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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)

11 0.08 0.07 0.06 0.05 0.04 0.04 0.04 0.04 0.04 0.03 0.03 0.03 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 3.44 3.21 41.60 3.44 3.21 42.40 3.44 3.21 43.20 3.44 3.21 44.00 3.44 3.21 44.80 3.44 3.21 45.60 3.44 3.21 46.40 3.44 3.21 47.20 3.44 3.21 48.00 3.44 3.21 48.80 3.44 3.21 49.60 3.44 3.21 50.40 3.44 3.21 51.20 3.44 3.21 52.00 3.44 3.21 52.80 3.44 3.21 53.60 3.44 3.21 54.40 3.44 3.21 55.20 3.44 3.21 56.00 3.44 3.21 56.80 3.44 3.21 57.60 3.44 3.21 58.40 3.44 3.21 59.20 3.44 3.21 60.00 3.44 3.21 60.80 3.44 3.21 61.60 3.44 3.21 62.40 3.44 3.21 63.20 3.44 3.21 64.00 3.44 3.21 64.80 3.44 3.21 65.60 3.44 3.21 66.40 3.44 3.21 67.20 3.44 3.21 68.00 3.44 3.21 68.80 3.44 3.21 69.60 3.44 3.21 70.40 3.44 3.21 71.20 3.44 3.21 72.00 3.44 3.21 72.80 3.44 3.21 73.60 3.44 3.21 74.40 3.44 3.21 75.20 3.44 3.21 76.00 3.44 3.21 76.80 3.44 3.21 77.60 3.44 3.21 78.40 3.44 3.21 79.20 3.44 3.21 80.00 3.44 3.21 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 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 3 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 20S: Basin 3 - Perv Runoff = 0.55 cfs @ 12.16 hrs, Volume= Routed to Pond 21P : Basin 3 1,922 cf, Depth= 1.20" 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 2-Year Rainfall=3.44" Area (sf) 19,242 19,242 Tc (min) 8.3 Length (feet) 75 CN 74 Description >75% Grass cover, Good, HSG C 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" Subcatchment 20S: Basin 3 - Perv Hydrograph Runoff 0.6 0.55 cfs 0.55 0.5 0.45 Flow (cfs) 0.4 0.35 0.3 0.25 0.2 0.15 0.1 NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=19,242 sf Runoff Volume=1,922 cf Runoff Depth=1.20" Flow Length=75' Slope=0.0400 '/' Tc=8.3 min CN=74 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 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 4 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 20S: Basin 3 - Perv Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 0.80 0.03 0.00 1.60 0.06 0.00 2.40 0.10 0.00 3.20 0.14 0.00 4.00 0.18 0.00 4.80 0.22 0.00 5.60 0.27 0.00 6.40 0.32 0.00 7.20 0.38 0.00 8.00 0.45 0.00 8.80 0.52 0.00 9.60 0.62 0.00 10.40 0.75 0.00 11.20 0.96 0.02 12.00 1.65 0.20 12.80 2.48 0.60 13.60 2.69 0.72 14.40 2.82 0.80 15.20 2.92 0.85 16.00 2.99 0.90 16.80 3.06 0.95 17.60 3.12 0.99 18.40 3.17 1.02 19.20 3.22 1.05 20.00 3.26 1.08 20.80 3.30 1.10 21.60 3.34 1.13 22.40 3.38 1.15 23.20 3.41 1.18 24.00 3.44 1.20 24.80 3.44 1.20 25.60 3.44 1.20 26.40 3.44 1.20 27.20 3.44 1.20 28.00 3.44 1.20 28.80 3.44 1.20 29.60 3.44 1.20 30.40 3.44 1.20 31.20 3.44 1.20 32.00 3.44 1.20 32.80 3.44 1.20 33.60 3.44 1.20 34.40 3.44 1.20 35.20 3.44 1.20 36.00 3.44 1.20 36.80 3.44 1.20 37.60 3.44 1.20 38.40 3.44 1.20 39.20 3.44 1.20 40.00 3.44 1.20 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 0.02 0.21 0.10 0.05 0.04 0.03 0.03 0.02 0.02 0.02 0.02 0.02 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 0.03 0.02 0.02 0.02 0.02 0.02 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 3.44 1.20 41.60 3.44 1.20 42.40 3.44 1.20 43.20 3.44 1.20 44.00 3.44 1.20 44.80 3.44 1.20 45.60 3.44 1.20 46.40 3.44 1.20 47.20 3.44 1.20 48.00 3.44 1.20 48.80 3.44 1.20 49.60 3.44 1.20 50.40 3.44 1.20 51.20 3.44 1.20 52.00 3.44 1.20 52.80 3.44 1.20 53.60 3.44 1.20 54.40 3.44 1.20 55.20 3.44 1.20 56.00 3.44 1.20 56.80 3.44 1.20 57.60 3.44 1.20 58.40 3.44 1.20 59.20 3.44 1.20 60.00 3.44 1.20 60.80 3.44 1.20 61.60 3.44 1.20 62.40 3.44 1.20 63.20 3.44 1.20 64.00 3.44 1.20 64.80 3.44 1.20 65.60 3.44 1.20 66.40 3.44 1.20 67.20 3.44 1.20 68.00 3.44 1.20 68.80 3.44 1.20 69.60 3.44 1.20 70.40 3.44 1.20 71.20 3.44 1.20 72.00 3.44 1.20 72.80 3.44 1.20 73.60 3.44 1.20 74.40 3.44 1.20 75.20 3.44 1.20 76.00 3.44 1.20 76.80 3.44 1.20 77.60 3.44 1.20 78.40 3.44 1.20 79.20 3.44 1.20 80.00 3.44 1.20 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 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 5 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 21S: Basin 4 - Imp Runoff = 3.77 cfs @ 12.12 hrs, Volume= Routed to Pond 22P : Basin 4 13,377 cf, Depth= 3.21" 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 2-Year Rainfall=3.44" Area (sf) 6,970 43,091 50,061 50,061 Tc (min) 0.9 Length (feet) 70 4.6 5.5 685 755 CN 98 98 98 Description Roofs, HSG D Paved parking, HSG C Weighted Average 100.00% Impervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0200 1.33 Sheet Flow, Sheet Flow (A-B) Smooth surfaces n= 0.011 P2= 3.47" 2.50 Direct Entry, Pipe Flow (B-C) Total Subcatchment 21S: Basin 4 - Imp Hydrograph 4 Flow (cfs) 3 2 1 0 Runoff 3.77 cfs NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=50,061 sf Runoff Volume=13,377 cf Runoff Depth=3.21" Flow Length=755' Slope=0.0200 '/' Tc=5.5 min CN=98 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 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 6 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 21S: Basin 4 - Imp Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 0.80 0.03 0.00 1.60 0.06 0.00 2.40 0.10 0.01 3.20 0.14 0.03 4.00 0.18 0.06 4.80 0.22 0.09 5.60 0.27 0.12 6.40 0.32 0.16 7.20 0.38 0.21 8.00 0.45 0.27 8.80 0.52 0.34 9.60 0.62 0.43 10.40 0.75 0.55 11.20 0.96 0.75 12.00 1.65 1.43 12.80 2.48 2.25 13.60 2.69 2.46 14.40 2.82 2.59 15.20 2.92 2.68 16.00 2.99 2.76 16.80 3.06 2.83 17.60 3.12 2.89 18.40 3.17 2.94 19.20 3.22 2.98 20.00 3.26 3.03 20.80 3.30 3.07 21.60 3.34 3.11 22.40 3.38 3.14 23.20 3.41 3.18 24.00 3.44 3.21 24.80 3.44 3.21 25.60 3.44 3.21 26.40 3.44 3.21 27.20 3.44 3.21 28.00 3.44 3.21 28.80 3.44 3.21 29.60 3.44 3.21 30.40 3.44 3.21 31.20 3.44 3.21 32.00 3.44 3.21 32.80 3.44 3.21 33.60 3.44 3.21 34.40 3.44 3.21 35.20 3.44 3.21 36.00 3.44 3.21 36.80 3.44 3.21 37.60 3.44 3.21 38.40 3.44 3.21 39.20 3.44 3.21 40.00 3.44 3.21 Runoff (cfs) 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.05 0.06 0.08 0.09 0.11 0.15 0.20 0.39 2.15 0.46 0.22 0.17 0.12 0.11 0.09 0.08 0.07 0.06 0.06 0.06 0.05 0.05 0.05 0.04 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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)

17 0.12 0.11 0.09 0.08 0.07 0.06 0.06 0.06 0.05 0.05 0.05 0.04 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 3.44 3.21 41.60 3.44 3.21 42.40 3.44 3.21 43.20 3.44 3.21 44.00 3.44 3.21 44.80 3.44 3.21 45.60 3.44 3.21 46.40 3.44 3.21 47.20 3.44 3.21 48.00 3.44 3.21 48.80 3.44 3.21 49.60 3.44 3.21 50.40 3.44 3.21 51.20 3.44 3.21 52.00 3.44 3.21 52.80 3.44 3.21 53.60 3.44 3.21 54.40 3.44 3.21 55.20 3.44 3.21 56.00 3.44 3.21 56.80 3.44 3.21 57.60 3.44 3.21 58.40 3.44 3.21 59.20 3.44 3.21 60.00 3.44 3.21 60.80 3.44 3.21 61.60 3.44 3.21 62.40 3.44 3.21 63.20 3.44 3.21 64.00 3.44 3.21 64.80 3.44 3.21 65.60 3.44 3.21 66.40 3.44 3.21 67.20 3.44 3.21 68.00 3.44 3.21 68.80 3.44 3.21 69.60 3.44 3.21 70.40 3.44 3.21 71.20 3.44 3.21 72.00 3.44 3.21 72.80 3.44 3.21 73.60 3.44 3.21 74.40 3.44 3.21 75.20 3.44 3.21 76.00 3.44 3.21 76.80 3.44 3.21 77.60 3.44 3.21 78.40 3.44 3.21 79.20 3.44 3.21 80.00 3.44 3.21 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