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 148 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Pond 48P: Basin 8 Hydrograph 5.63 cfs Inflow Area=62,190 sf Peak Elev=574.11' Storage=4,465 cf 6 5 Inflow Outflow Discarded Primary Flow (cfs) 4 3 1.54 cfs 2 0.93 cfs 1 0 0.61 cfs 0 5 10 15 20 25 30 35 40 45 Time (hours) 50 55 60 65 70 75 80 Pond 48P: Basin 8 Stage-Discharge Total Discarded Primary 576 Sharp-Crested Rectangular Weir Elevation (feet) 575 574 Orifice Exfiltration 573 0 1 2 3 4 5 6 7 8 Discharge (cfs) 9 10 11 12 13 14

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 149 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Pond 48P: Basin 8 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 74.00 76.00 78.00 80.00 Inflow (cfs) 0.00 0.03 0.06 0.07 0.12 0.24 2.74 0.34 0.19 0.13 0.11 0.09 0.08 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 4 7 9 15 30 879 1,445 25 17 14 12 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Elevation (feet) 573.00 573.00 573.00 573.00 573.00 573.01 573.22 573.36 573.01 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 573.00 Outflow (cfs) 0.00 0.03 0.06 0.07 0.12 0.23 0.93 0.93 0.19 0.13 0.11 0.09 0.08 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Discarded (cfs) 0.00 0.03 0.06 0.07 0.12 0.23 0.93 0.93 0.19 0.13 0.11 0.09 0.08 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 150 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Stage-Discharge for Pond 48P: Basin 8 Elevation (feet) 573.00 573.05 573.10 573.15 573.20 573.25 573.30 573.35 573.40 573.45 573.50 573.55 573.60 573.65 573.70 573.75 573.80 573.85 573.90 573.95 574.00 574.05 574.10 574.15 574.20 574.25 574.30 574.35 574.40 574.45 574.50 574.55 574.60 574.65 574.70 574.75 574.80 574.85 574.90 574.95 575.00 575.05 575.10 575.15 575.20 575.25 575.30 575.35 575.40 575.45 575.50 Discharge (cfs) 0.00 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.94 0.96 0.99 1.04 1.09 1.16 1.22 1.29 1.35 1.40 1.45 1.49 1.53 1.56 1.60 1.63 1.66 1.69 1.72 1.75 1.77 1.80 1.82 1.85 1.87 1.90 1.92 1.94 1.96 1.98 2.01 2.17 2.46 2.82 3.24 3.72 4.24 4.80 5.40 6.04 6.70 Discarded (cfs) 0.00 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 Primary (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.03 0.07 0.11 0.17 0.23 0.30 0.36 0.43 0.47 0.52 0.56 0.60 0.63 0.67 0.70 0.73 0.76 0.79 0.82 0.85 0.87 0.90 0.92 0.95 0.97 0.99 1.01 1.04 1.06 1.08 1.24 1.53 1.89 2.32 2.79 3.31 3.88 4.48 5.11 5.78 Elevation (feet) 575.55 575.60 575.65 575.70 575.75 575.80 575.85 575.90 575.95 576.00 Discharge (cfs) 7.40 8.13 8.88 9.66 10.46 11.28 12.13 13.00 13.88 14.79 Discarded (cfs) 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 Primary (cfs) 6.47 7.20 7.95 8.73 9.53 10.35 11.20 12.07 12.95 13.86

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 151 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 48P: Basin 8 Elevation (feet) 573.00 573.05 573.10 573.15 573.20 573.25 573.30 573.35 573.40 573.45 573.50 573.55 573.60 573.65 573.70 573.75 573.80 573.85 573.90 573.95 574.00 574.05 574.10 574.15 574.20 574.25 574.30 574.35 574.40 574.45 574.50 574.55 574.60 574.65 574.70 574.75 574.80 574.85 574.90 574.95 575.00 575.05 575.10 575.15 575.20 575.25 575.30 575.35 575.40 575.45 575.50 Surface (sq-ft) 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 Storage (cubic-feet) 0 200 401 601 802 1,002 1,202 1,403 1,603 1,803 2,004 2,204 2,405 2,605 2,805 3,006 3,206 3,406 3,607 3,807 4,008 4,208 4,408 4,609 4,809 5,010 5,210 5,410 5,611 5,811 6,011 6,212 6,412 6,613 6,813 7,013 7,214 7,414 7,614 7,815 8,015 8,216 8,416 8,616 8,817 9,017 9,217 9,418 9,618 9,819 10,019 Elevation (feet) 575.55 575.60 575.65 575.70 575.75 575.80 575.85 575.90 575.95 576.00 Surface (sq-ft) 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 10,019 Storage (cubic-feet) 10,219 10,420 10,620 10,821 11,021 11,221 11,422 11,622 11,822 12,023

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 152 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Pond 49P: Basin 7 Inflow Area = 169,079 sf, 50.99% Impervious, Inflow Depth = 2.52" for 10-Year event Inflow = 8.21 cfs @ 12.21 hrs, Volume= 35,532 cf Outflow = 2.01 cfs @ 12.80 hrs, Volume= 29,759 cf, Atten= 76%, Lag= 35.4 min Primary = 2.01 cfs @ 12.80 hrs, Volume= 29,759 cf Routed to Link 28L : POA 2 Routing by Stor-Ind method, Time Span= 0.00-80.00 hrs, dt= 0.04 hrs Peak Elev= 532.17' @ 12.80 hrs Surf.Area= 16,410 sf Storage= 17,984 cf Plug-Flow detention time= 309.2 min calculated for 29,744 cf (84% of inflow) Center-of-Mass det. time= 237.8 min ( 1,028.1 - 790.2 ) Volume #1 Invert 531.00' Elevation (feet) 531.00 532.00 533.00 534.00 Device #1 Routing Primary Avail.Storage 50,966 cf Surf.Area (sq-ft) 14,375 16,117 17,860 19,602 Invert 531.38' Storage Description Custom Stage Data (Prismatic) Listed below (Recalc) Inc.Store (cubic-feet) 0 15,246 16,989 18,731 Cum.Store (cubic-feet) 0 15,246 32,235 50,966 Outlet Devices 12.0" Vert. Orifice C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=2.01 cfs @ 12.80 hrs HW=532.17' (Free Discharge) 1=Orifice (Orifice Controls 2.01 cfs @ 3.02 fps)

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 153 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Pond 49P: Basin 7 Hydrograph 9 Inflow Primary 8.21 cfs Inflow Area=169,079 sf Peak Elev=532.17' Storage=17,984 cf 8 7 Flow (cfs) 6 5 4 3 2.01 cfs 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) Pond 49P: Basin 7 Stage-Discharge 534 Primary Elevation (feet) 533 532 Orifice 531 0 1 2 3 Discharge (cfs) 4 5

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 154 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Pond 49P: Basin 7 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 74.00 76.00 78.00 80.00 Inflow (cfs) 0.00 0.03 0.07 0.09 0.14 0.31 3.33 0.58 0.32 0.22 0.18 0.16 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 0.00 0.00 Storage (cubic-feet) 0 73 438 989 1,789 3,271 9,196 15,128 11,609 10,153 9,369 8,939 8,627 7,792 7,277 6,954 6,730 6,571 6,446 6,347 6,269 6,207 6,156 6,111 6,070 6,033 6,000 5,970 5,944 5,920 5,898 5,879 5,862 5,846 5,832 5,820 5,808 5,798 5,789 5,781 5,774 Elevation (feet) 531.00 531.01 531.03 531.07 531.12 531.22 531.62 531.99 531.77 531.68 531.63 531.60 531.58 531.53 531.49 531.47 531.46 531.45 531.44 531.43 531.43 531.42 531.42 531.41 531.41 531.41 531.41 531.41 531.40 531.40 531.40 531.40 531.40 531.40 531.40 531.40 531.39 531.39 531.39 531.39 531.39 Primary (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.24 1.34 0.61 0.37 0.26 0.20 0.17 0.09 0.06 0.04 0.03 0.02 0.02 0.01 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

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 155 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Stage-Discharge for Pond 49P: Basin 7 Elevation (feet) 531.00 531.02 531.04 531.06 531.08 531.10 531.12 531.14 531.16 531.18 531.20 531.22 531.24 531.26 531.28 531.30 531.32 531.34 531.36 531.38 531.40 531.42 531.44 531.46 531.48 531.50 531.52 531.54 531.56 531.58 531.60 531.62 531.64 531.66 531.68 531.70 531.72 531.74 531.76 531.78 531.80 531.82 531.84 531.86 531.88 531.90 531.92 531.94 531.96 531.98 532.00 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 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.03 0.04 0.06 0.09 0.11 0.14 0.17 0.20 0.24 0.28 0.32 0.37 0.42 0.47 0.52 0.57 0.63 0.69 0.75 0.81 0.88 0.95 1.01 1.08 1.15 1.22 1.30 1.37 Elevation (feet) 532.02 532.04 532.06 532.08 532.10 532.12 532.14 532.16 532.18 532.20 532.22 532.24 532.26 532.28 532.30 532.32 532.34 532.36 532.38 532.40 532.42 532.44 532.46 532.48 532.50 532.52 532.54 532.56 532.58 532.60 532.62 532.64 532.66 532.68 532.70 532.72 532.74 532.76 532.78 532.80 532.82 532.84 532.86 532.88 532.90 532.92 532.94 532.96 532.98 533.00 533.02 Primary (cfs) 1.45 1.52 1.60 1.67 1.75 1.83 1.90 1.98 2.05 2.13 2.20 2.27 2.34 2.40 2.47 2.53 2.58 2.63 2.67 2.73 2.78 2.83 2.88 2.93 2.98 3.03 3.07 3.12 3.16 3.21 3.25 3.30 3.34 3.38 3.42 3.47 3.51 3.55 3.59 3.63 3.67 3.71 3.74 3.78 3.82 3.86 3.89 3.93 3.97 4.00 4.04 Elevation (feet) 533.04 533.06 533.08 533.10 533.12 533.14 533.16 533.18 533.20 533.22 533.24 533.26 533.28 533.30 533.32 533.34 533.36 533.38 533.40 533.42 533.44 533.46 533.48 533.50 533.52 533.54 533.56 533.58 533.60 533.62 533.64 533.66 533.68 533.70 533.72 533.74 533.76 533.78 533.80 533.82 533.84 533.86 533.88 533.90 533.92 533.94 533.96 533.98 534.00 Primary (cfs) 4.07 4.11 4.14 4.18 4.21 4.24 4.28 4.31 4.34 4.38 4.41 4.44 4.47 4.51 4.54 4.57 4.60 4.63 4.66 4.69 4.72 4.75 4.78 4.81 4.84 4.87 4.90 4.93 4.96 4.99 5.02 5.05 5.07 5.10 5.13 5.16 5.19 5.21 5.24 5.27 5.29 5.32 5.35 5.37 5.40 5.43 5.45 5.48 5.51

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 156 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 49P: Basin 7 Elevation (feet) 531.00 531.05 531.10 531.15 531.20 531.25 531.30 531.35 531.40 531.45 531.50 531.55 531.60 531.65 531.70 531.75 531.80 531.85 531.90 531.95 532.00 532.05 532.10 532.15 532.20 532.25 532.30 532.35 532.40 532.45 532.50 532.55 532.60 532.65 532.70 532.75 532.80 532.85 532.90 532.95 533.00 533.05 533.10 533.15 533.20 533.25 533.30 533.35 533.40 533.45 533.50 Surface (sq-ft) 14,375 14,462 14,549 14,636 14,723 14,811 14,898 14,985 15,072 15,159 15,246 15,333 15,420 15,507 15,594 15,682 15,769 15,856 15,943 16,030 16,117 16,204 16,291 16,378 16,466 16,553 16,640 16,727 16,814 16,901 16,989 17,076 17,163 17,250 17,337 17,424 17,511 17,599 17,686 17,773 17,860 17,947 18,034 18,121 18,208 18,296 18,383 18,470 18,557 18,644 18,731 Storage (cubic-feet) 0 721 1,446 2,176 2,910 3,648 4,391 5,138 5,889 6,645 7,405 8,170 8,939 9,712 10,489 11,271 12,057 12,848 13,643 14,442 15,246 16,054 16,866 17,683 18,504 19,330 20,160 20,994 21,832 22,675 23,522 24,374 25,230 26,090 26,955 27,824 28,697 29,575 30,457 31,344 32,235 33,130 34,029 34,933 35,841 36,754 37,671 38,592 39,518 40,448 41,382 Elevation (feet) 533.55 533.60 533.65 533.70 533.75 533.80 533.85 533.90 533.95 534.00 Surface (sq-ft) 18,818 18,905 18,992 19,079 19,167 19,254 19,341 19,428 19,515 19,602 Storage (cubic-feet) 42,321 43,264 44,211 45,163 46,119 47,080 48,045 49,014 49,988 50,966

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 157 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Link 28L: POA 2 Inflow Area = Inflow = Primary = 771,459 sf, 50.89% Impervious, Inflow Depth = 1.61" for 10-Year event 19.45 cfs @ 12.20 hrs, Volume= 103,292 cf 19.45 cfs @ 12.20 hrs, Volume= 103,292 cf, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-80.00 hrs, dt= 0.04 hrs Link 28L: POA 2 Flow (cfs) Hydrograph 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 19.45 cfs 19.45 cfs Inflow Primary Inflow Area=771,459 sf 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)