Revised Stormwater Management Report

POA 1 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 9 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 23S: Basin 6 - Perv Runoff = 2.33 cfs @ 12.11 hrs, Volume= Routed to Pond 24P : Basin 6 6,639 cf, Depth= 1.20" 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 2-Year Rainfall=3.44" Area (sf) 66,461 66,461 Tc (min) 0.6 Length (feet) 40 3.0 3.6 450 490 CN 74 Description >75% Grass cover, Good, HSG C 100.00% Pervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0200 1.19 Sheet Flow, Sheet Flow (A-B) Smooth surfaces n= 0.011 P2= 3.47" 2.50 Direct Entry, Pipe Flow (B-C) Total Subcatchment 23S: Basin 6 - Perv Hydrograph Runoff 2.33 cfs Flow (cfs) 2 1 0 0 2 4 NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=66,461 sf Runoff Volume=6,639 cf Runoff Depth=1.20" Flow Length=490' Slope=0.0200 '/' Tc=3.6 min CN=74 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 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 10 HydroCAD® 10.20-5a 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 0.04 0.00 2.00 0.08 0.00 3.00 0.13 0.00 4.00 0.18 0.00 5.00 0.24 0.00 6.00 0.29 0.00 7.00 0.36 0.00 8.00 0.45 0.00 9.00 0.55 0.00 10.00 0.68 0.00 11.00 0.89 0.01 12.00 1.65 0.20 13.00 2.55 0.63 14.00 2.76 0.76 15.00 2.89 0.84 16.00 2.99 0.90 17.00 3.08 0.96 18.00 3.15 1.00 19.00 3.20 1.04 20.00 3.26 1.08 21.00 3.31 1.11 22.00 3.36 1.14 23.00 3.40 1.17 24.00 3.44 1.20 25.00 3.44 1.20 26.00 3.44 1.20 27.00 3.44 1.20 28.00 3.44 1.20 29.00 3.44 1.20 30.00 3.44 1.20 31.00 3.44 1.20 32.00 3.44 1.20 33.00 3.44 1.20 34.00 3.44 1.20 35.00 3.44 1.20 36.00 3.44 1.20 37.00 3.44 1.20 38.00 3.44 1.20 39.00 3.44 1.20 40.00 3.44 1.20 41.00 3.44 1.20 42.00 3.44 1.20 43.00 3.44 1.20 44.00 3.44 1.20 45.00 3.44 1.20 46.00 3.44 1.20 47.00 3.44 1.20 48.00 3.44 1.20 49.00 3.44 1.20 50.00 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 0.04 1.11 0.28 0.15 0.11 0.09 0.08 0.06 0.06 0.05 0.05 0.05 0.04 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 0.00 0.00 0.00 0.00 0.00 0.00 Time Precip. Excess (hours) (inches) (inches) 51.00 3.44 1.20 52.00 3.44 1.20 53.00 3.44 1.20 54.00 3.44 1.20 55.00 3.44 1.20 56.00 3.44 1.20 57.00 3.44 1.20 58.00 3.44 1.20 59.00 3.44 1.20 60.00 3.44 1.20 61.00 3.44 1.20 62.00 3.44 1.20 63.00 3.44 1.20 64.00 3.44 1.20 65.00 3.44 1.20 66.00 3.44 1.20 67.00 3.44 1.20 68.00 3.44 1.20 69.00 3.44 1.20 70.00 3.44 1.20 71.00 3.44 1.20 72.00 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

POA 1 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 11 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 26S: DA 1 Und - Perv Runoff = 2.46 cfs @ 12.15 hrs, Volume= Routed to Link 25L : POA 1 7,944 cf, Depth= 1.39" 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 2-Year Rainfall=3.44" Area (sf) 34,475 34,300 68,775 68,775 Tc (min) 6.9 Length (feet) 100 0.2 50 7.1 150 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) 0.1100 0.24 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" 0.1100 5.34 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps Total Subcatchment 26S: DA 1 Und - Perv Hydrograph Runoff 2.46 cfs Flow (cfs) 2 1 0 0 2 4 NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=68,775 sf Runoff Volume=7,944 cf Runoff Depth=1.39" Flow Length=150' Slope=0.1100 '/' Tc=7.1 min CN=77 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 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 12 HydroCAD® 10.20-5a 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 0.04 0.00 2.00 0.08 0.00 3.00 0.13 0.00 4.00 0.18 0.00 5.00 0.24 0.00 6.00 0.29 0.00 7.00 0.36 0.00 8.00 0.45 0.00 9.00 0.55 0.00 10.00 0.68 0.00 11.00 0.89 0.03 12.00 1.65 0.27 13.00 2.55 0.77 14.00 2.76 0.91 15.00 2.89 1.00 16.00 2.99 1.07 17.00 3.08 1.13 18.00 3.15 1.17 19.00 3.20 1.22 20.00 3.26 1.25 21.00 3.31 1.29 22.00 3.36 1.33 23.00 3.40 1.36 24.00 3.44 1.39 25.00 3.44 1.39 26.00 3.44 1.39 27.00 3.44 1.39 28.00 3.44 1.39 29.00 3.44 1.39 30.00 3.44 1.39 31.00 3.44 1.39 32.00 3.44 1.39 33.00 3.44 1.39 34.00 3.44 1.39 35.00 3.44 1.39 36.00 3.44 1.39 37.00 3.44 1.39 38.00 3.44 1.39 39.00 3.44 1.39 40.00 3.44 1.39 41.00 3.44 1.39 42.00 3.44 1.39 43.00 3.44 1.39 44.00 3.44 1.39 45.00 3.44 1.39 46.00 3.44 1.39 47.00 3.44 1.39 48.00 3.44 1.39 49.00 3.44 1.39 50.00 3.44 1.39 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.07 1.05 0.34 0.18 0.12 0.10 0.09 0.07 0.06 0.06 0.06 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 0.00 0.00 0.00 0.00 0.00 0.00 Time Precip. Excess (hours) (inches) (inches) 51.00 3.44 1.39 52.00 3.44 1.39 53.00 3.44 1.39 54.00 3.44 1.39 55.00 3.44 1.39 56.00 3.44 1.39 57.00 3.44 1.39 58.00 3.44 1.39 59.00 3.44 1.39 60.00 3.44 1.39 61.00 3.44 1.39 62.00 3.44 1.39 63.00 3.44 1.39 64.00 3.44 1.39 65.00 3.44 1.39 66.00 3.44 1.39 67.00 3.44 1.39 68.00 3.44 1.39 69.00 3.44 1.39 70.00 3.44 1.39 71.00 3.44 1.39 72.00 3.44 1.39 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

POA 1 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 13 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 27S: Basin 5 - Perv Runoff = 0.13 cfs @ 12.10 hrs, Volume= Routed to Pond 18P : Basin 5 343 cf, Depth= 1.20" 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 2-Year Rainfall=3.44" Area (sf) 3,436 3,436 Tc (min) 0.6 Length (feet) 40 1.2 1.8 182 222 CN 74 Description >75% Grass cover, Good, HSG C 100.00% Pervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0200 1.19 Sheet Flow, Sheet Flow (A-B) Smooth surfaces n= 0.011 P2= 3.47" 2.50 Direct Entry, Pipe Flow (B-C) Total Subcatchment 27S: Basin 5 - Perv Hydrograph 0.14 Runoff 0.13 cfs 0.13 0.12 0.11 0.1 Flow (cfs) 0.09 0.08 0.07 0.06 0.05 0.04 0.03 NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=3,436 sf Runoff Volume=343 cf Runoff Depth=1.20" Flow Length=222' Slope=0.0200 '/' Tc=1.8 min CN=74 0.02 0.01 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 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 14 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 27S: Basin 5 - Perv Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 1.00 0.04 0.00 2.00 0.08 0.00 3.00 0.13 0.00 4.00 0.18 0.00 5.00 0.24 0.00 6.00 0.29 0.00 7.00 0.36 0.00 8.00 0.45 0.00 9.00 0.55 0.00 10.00 0.68 0.00 11.00 0.89 0.01 12.00 1.65 0.20 13.00 2.55 0.63 14.00 2.76 0.76 15.00 2.89 0.84 16.00 2.99 0.90 17.00 3.08 0.96 18.00 3.15 1.00 19.00 3.20 1.04 20.00 3.26 1.08 21.00 3.31 1.11 22.00 3.36 1.14 23.00 3.40 1.17 24.00 3.44 1.20 25.00 3.44 1.20 26.00 3.44 1.20 27.00 3.44 1.20 28.00 3.44 1.20 29.00 3.44 1.20 30.00 3.44 1.20 31.00 3.44 1.20 32.00 3.44 1.20 33.00 3.44 1.20 34.00 3.44 1.20 35.00 3.44 1.20 36.00 3.44 1.20 37.00 3.44 1.20 38.00 3.44 1.20 39.00 3.44 1.20 40.00 3.44 1.20 41.00 3.44 1.20 42.00 3.44 1.20 43.00 3.44 1.20 44.00 3.44 1.20 45.00 3.44 1.20 46.00 3.44 1.20 47.00 3.44 1.20 48.00 3.44 1.20 49.00 3.44 1.20 50.00 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 0.06 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 0.00 0.00 0.00 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 3.44 1.20 52.00 3.44 1.20 53.00 3.44 1.20 54.00 3.44 1.20 55.00 3.44 1.20 56.00 3.44 1.20 57.00 3.44 1.20 58.00 3.44 1.20 59.00 3.44 1.20 60.00 3.44 1.20 61.00 3.44 1.20 62.00 3.44 1.20 63.00 3.44 1.20 64.00 3.44 1.20 65.00 3.44 1.20 66.00 3.44 1.20 67.00 3.44 1.20 68.00 3.44 1.20 69.00 3.44 1.20 70.00 3.44 1.20 71.00 3.44 1.20 72.00 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

POA 1 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 15 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Pond 16P: Basin 1 Inflow Area = 378,971 sf, 51.29% Impervious, Inflow Depth = 0.74" for 2-Year event Inflow = 5.32 cfs @ 12.22 hrs, Volume= 23,295 cf Outflow = 0.19 cfs @ 17.68 hrs, Volume= 13,426 cf, Atten= 96%, Lag= 327.6 min Primary = 0.19 cfs @ 17.68 hrs, Volume= 13,426 cf Routed to Link 25L : POA 1 Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs Peak Elev= 544.02' @ 17.68 hrs Surf.Area= 33,581 sf Storage= 17,163 cf Plug-Flow detention time= 955.1 min calculated for 13,426 cf (58% of inflow) Center-of-Mass det. time= 826.2 min ( 1,649.2 - 822.9 ) Volume #1 Invert 543.50' Elevation (feet) 543.50 544.00 545.00 546.00 547.00 Avail.Storage 126,759 cf Surf.Area (sq-ft) 32,670 33,541 35,719 37,897 39,640 Device #1 Routing Primary Invert 546.00' #2 Primary 543.75' Storage Description Custom Stage Data (Prismatic) Listed below (Recalc) Inc.Store (cubic-feet) 0 16,553 34,630 36,808 38,769 Cum.Store (cubic-feet) 0 16,553 51,183 87,991 126,759 Outlet Devices 42.0" x 48.0" Horiz. Grate C= 0.600 Limited to weir flow at low heads 6.0" Vert. Orifice C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.19 cfs @ 17.68 hrs HW=544.02' (Free Discharge) 1=Grate ( Controls 0.00 cfs) 2=Orifice (Orifice Controls 0.19 cfs @ 1.76 fps)

POA 1 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 16 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Pond 16P: Basin 1 Hydrograph Inflow Primary 5.32 cfs Inflow Area=378,971 sf Peak Elev=544.02' Storage=17,163 cf 5 Flow (cfs) 4 3 2 1 0.19 cfs 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) Pond 16P: Basin 1 Stage-Discharge 547 Primary Grate Elevation (feet) 546 545 544 Orifice 0 5 10 15 20 25 30 Discharge (cfs) 35 40 45 50

POA 1 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 17 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Pond 16P: Basin 1 Time (hours) 0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00 18.00 20.00 22.00 24.00 26.00 28.00 30.00 32.00 34.00 36.00 38.00 40.00 42.00 44.00 46.00 48.00 50.00 52.00 54.00 56.00 58.00 60.00 62.00 64.00 66.00 68.00 70.00 72.00 Inflow (cfs) 0.00 0.01 0.03 0.04 0.07 0.14 1.97 0.46 0.26 0.18 0.15 0.13 0.11 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Storage (cubic-feet) 0 14 154 404 787 1,424 4,726 15,724 16,944 17,156 16,963 16,685 16,342 15,386 14,562 13,895 13,347 12,889 12,505 12,173 11,886 11,638 11,422 11,228 11,054 10,897 10,756 10,629 10,515 10,412 10,319 10,232 10,150 10,073 10,001 9,933 9,869 Elevation (feet) 543.50 543.50 543.50 543.51 543.52 543.54 543.64 543.98 544.01 544.02 544.01 544.00 543.99 543.97 543.94 543.92 543.90 543.89 543.88 543.87 543.86 543.85 543.85 543.84 543.84 543.83 543.83 543.82 543.82 543.82 543.81 543.81 543.81 543.81 543.80 543.80 543.80 Primary (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.18 0.19 0.18 0.17 0.16 0.13 0.10 0.08 0.07 0.06 0.05 0.04 0.04 0.03 0.03 0.03 0.02 0.02 0.02 0.02 0.02 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01

POA 1 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 18 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Stage-Discharge for Pond 16P: Basin 1 Elevation (feet) 543.50 543.52 543.54 543.56 543.58 543.60 543.62 543.64 543.66 543.68 543.70 543.72 543.74 543.76 543.78 543.80 543.82 543.84 543.86 543.88 543.90 543.92 543.94 543.96 543.98 544.00 544.02 544.04 544.06 544.08 544.10 544.12 544.14 544.16 544.18 544.20 544.22 544.24 544.26 544.28 544.30 544.32 544.34 544.36 544.38 544.40 544.42 544.44 544.46 544.48 544.50 Primary (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 0.01 0.02 0.02 0.04 0.05 0.07 0.08 0.10 0.12 0.14 0.17 0.19 0.22 0.24 0.27 0.30 0.32 0.35 0.38 0.40 0.43 0.45 0.47 0.48 0.50 0.52 0.53 0.55 0.57 0.58 0.60 0.61 0.63 0.64 0.66 0.67 Elevation (feet) 544.52 544.54 544.56 544.58 544.60 544.62 544.64 544.66 544.68 544.70 544.72 544.74 544.76 544.78 544.80 544.82 544.84 544.86 544.88 544.90 544.92 544.94 544.96 544.98 545.00 545.02 545.04 545.06 545.08 545.10 545.12 545.14 545.16 545.18 545.20 545.22 545.24 545.26 545.28 545.30 545.32 545.34 545.36 545.38 545.40 545.42 545.44 545.46 545.48 545.50 545.52 Primary (cfs) 0.68 0.69 0.71 0.72 0.73 0.74 0.76 0.77 0.78 0.79 0.80 0.81 0.82 0.83 0.85 0.86 0.87 0.88 0.89 0.90 0.91 0.92 0.93 0.94 0.95 0.95 0.96 0.97 0.98 0.99 1.00 1.01 1.02 1.03 1.04 1.04 1.05 1.06 1.07 1.08 1.09 1.09 1.10 1.11 1.12 1.13 1.13 1.14 1.15 1.16 1.17 Elevation (feet) 545.54 545.56 545.58 545.60 545.62 545.64 545.66 545.68 545.70 545.72 545.74 545.76 545.78 545.80 545.82 545.84 545.86 545.88 545.90 545.92 545.94 545.96 545.98 546.00 546.02 546.04 546.06 546.08 546.10 546.12 546.14 546.16 546.18 546.20 546.22 546.24 546.26 546.28 546.30 546.32 546.34 546.36 546.38 546.40 546.42 546.44 546.46 546.48 546.50 546.52 546.54 Primary (cfs) 1.17 1.18 1.19 1.20 1.20 1.21 1.22 1.23 1.23 1.24 1.25 1.25 1.26 1.27 1.28 1.28 1.29 1.30 1.30 1.31 1.32 1.32 1.33 1.34 1.48 1.74 2.08 2.47 2.92 3.42 3.95 4.53 5.14 5.79 6.47 7.18 7.92 8.69 9.49 10.32 11.17 12.05 12.95 13.87 14.82 15.79 16.79 17.80 18.84 19.89 20.97 Elevation (feet) 546.56 546.58 546.60 546.62 546.64 546.66 546.68 546.70 546.72 546.74 546.76 546.78 546.80 546.82 546.84 546.86 546.88 546.90 546.92 546.94 546.96 546.98 547.00 Primary