complete drainage report rev 9

POA-2 2024-05-12 HydroCad - Proposed POA 2B-1 NOAA 24-hr D 10-Year Rainfall=5.22" Printed 10/25/2024 Page 191 Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Stage-Discharge for Pond 41P: Basin 10 Elevation (feet) 576.00 576.05 576.10 576.15 576.20 576.25 576.30 576.35 576.40 576.45 576.50 576.55 576.60 576.65 576.70 576.75 576.80 576.85 576.90 576.95 577.00 577.05 577.10 577.15 577.20 577.25 577.30 577.35 577.40 577.45 577.50 577.55 577.60 577.65 577.70 577.75 577.80 577.85 577.90 577.95 578.00 578.05 578.10 578.15 578.20 578.25 578.30 578.35 578.40 578.45 578.50 Discharge (cfs) 0.00 2.22 2.22 2.22 2.22 2.22 2.34 2.57 2.87 3.22 3.62 4.06 4.54 5.06 5.61 6.19 6.80 7.44 8.11 8.80 9.52 10.26 11.02 11.81 12.62 13.45 14.18 14.82 15.42 15.98 16.52 17.61 19.17 21.03 23.12 25.43 27.91 30.57 33.38 36.33 39.43 42.65 46.00 49.47 53.05 56.74 60.54 64.45 68.45 72.56 76.75 Discarded (cfs) 0.00 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 Primary (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.13 0.36 0.65 1.00 1.40 1.85 2.33 2.84 3.39 3.97 4.58 5.22 5.89 6.58 7.30 8.04 8.80 9.59 10.40 11.23 11.96 12.61 13.20 13.76 14.30 15.39 16.95 18.81 20.90 23.21 25.69 28.35 31.16 34.12 37.21 40.43 43.78 47.25 50.83 54.53 58.33 62.23 66.23 70.34 74.54 Elevation (feet) 578.55 578.60 578.65 578.70 578.75 578.80 578.85 578.90 578.95 579.00 Discharge (cfs) 81.05 85.43 89.90 94.46 99.11 103.84 108.65 113.54 118.51 121.80 Discarded (cfs) 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22 Primary (cfs) 78.83 83.21 87.68 92.24 96.89 101.62 106.43 111.32 116.29 119.58

POA-2 2024-05-12 HydroCad - Proposed POA 2B-1 NOAA 24-hr D 10-Year Rainfall=5.22" Printed 10/25/2024 Page 192 Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 41P: Basin 10 Elevation (feet) 576.00 576.05 576.10 576.15 576.20 576.25 576.30 576.35 576.40 576.45 576.50 576.55 576.60 576.65 576.70 576.75 576.80 576.85 576.90 576.95 577.00 577.05 577.10 577.15 577.20 577.25 577.30 577.35 577.40 577.45 577.50 577.55 577.60 577.65 577.70 577.75 577.80 577.85 577.90 577.95 578.00 578.05 578.10 578.15 578.20 578.25 578.30 578.35 578.40 578.45 578.50 Surface (sq-ft) 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 Storage (cubic-feet) 0 479 958 1,437 1,917 2,396 2,875 3,354 3,833 4,312 4,792 5,271 5,750 6,229 6,708 7,187 7,666 8,146 8,625 9,104 9,583 10,062 10,541 11,020 11,500 11,979 12,458 12,937 13,416 13,895 14,375 14,854 15,333 15,812 16,291 16,770 17,249 17,729 18,208 18,687 19,166 19,645 20,124 20,603 21,083 21,562 22,041 22,520 22,999 23,478 23,958 Elevation (feet) 578.55 578.60 578.65 578.70 578.75 578.80 578.85 578.90 578.95 579.00 Surface (sq-ft) 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 9,583 Storage (cubic-feet) 24,437 24,916 25,395 25,874 26,353 26,832 27,312 27,791 28,270 28,749

POA-2 2024-05-12 HydroCad - Proposed POA 2B-1 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 193 Summary for Pond 42P: Basin 9 Inflow Area = 26,377 sf, 66.20% Impervious, Inflow Depth = 4.28" for 10-Year event Inflow = 2.52 cfs @ 12.14 hrs, Volume= 9,405 cf Outflow = 0.61 cfs @ 11.84 hrs, Volume= 9,405 cf, Atten= 76%, Lag= 0.0 min Discarded = 0.61 cfs @ 11.84 hrs, Volume= 9,405 cf Primary = 0.00 cfs @ 0.00 hrs, Volume= 0 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= 562.64' @ 12.46 hrs Surf.Area= 6,534 sf Storage= 1,667 cf Plug-Flow detention time= 13.6 min calculated for 9,400 cf (100% of inflow) Center-of-Mass det. time= 13.6 min ( 783.2 - 769.5 ) Volume #1 Invert 562.00' Elevation (feet) 562.00 563.00 564.00 564.42 Device #1 #2 #3 Avail.Storage 6,325 cf Surf.Area (sq-ft) 6,534 6,534 6,534 6,534 Routing Primary Primary Discarded Invert 564.00' 563.00' 562.00' Storage Description Custom Stage Data (Prismatic) Listed below (Recalc) 15,812 cf Overall x 40.0% Voids Inc.Store (cubic-feet) 0 6,534 6,534 2,744 Cum.Store (cubic-feet) 0 6,534 13,068 15,812 Outlet Devices 4.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) 3.0" Vert. Orifice C= 0.600 Limited to weir flow at low heads 4.000 in/hr Exfiltration over Surface area Discarded OutFlow Max=0.61 cfs @ 11.84 hrs HW=562.02' (Free Discharge) 3=Exfiltration (Exfiltration Controls 0.61 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=562.00' (Free Discharge) 1=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 2=Orifice ( Controls 0.00 cfs) Sharp-Crested Rectangular Weir Pond 42P: Basin 9 Orifice Exfiltration

POA-2 NOAA 24-hr D 10-Year Rainfall=5.22" 2024-05-12 HydroCad - Proposed POA 2B-1 Printed 10/25/2024 Page 194 Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Pond 42P: Basin 9 Hydrograph 2.52 cfs Inflow Area=26,377 sf Peak Elev=562.64' Storage=1,667 cf Inflow Outflow Discarded Primary Flow (cfs) 2 1 0.61 cfs 0.61 cfs 0.00 cfs 0 0 5 10 15 20 25 30 35 40 45 Time (hours) 50 55 60 65 70 75 80 Pond 42P: Basin 9 Stage-Discharge Total Discarded Primary Sharp-Crested Rectangular Weir Elevation (feet) 564 Orifice 563 Exfiltration 562 0 1 2 Discharge (cfs) 3 4

POA-2 NOAA 24-hr D 10-Year Rainfall=5.22" 2024-05-12 HydroCad - Proposed POA 2B-1 Printed 10/25/2024 Page 195 Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Pond 42P: Basin 9 Stage-Area-Storage 0 500 1,000 1,500 Surface/Horizontal/Wetted Area (sq-ft) 2,000 2,500 3,000 3,500 4,000 4,500 5,000 5,500 6,000 Elevation (feet) 564 563 Custom Stage Data 562 0 1,000 2,000 3,000 Storage (cubic-feet) 4,000 5,000 6,000 6,500 Surface Storage

POA-2 2024-05-12 HydroCad - Proposed POA 2B-1 NOAA 24-hr D 10-Year Rainfall=5.22" Printed 10/25/2024 Page 196 Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Pond 42P: Basin 9 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 0.01 0.02 0.03 0.05 0.11 1.30 0.15 0.08 0.05 0.05 0.04 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 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Storage (cubic-feet) 0 1 3 3 6 11 239 16 9 6 5 4 4 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) 562.00 562.00 562.00 562.00 562.00 562.00 562.09 562.01 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 562.00 Outflow (cfs) 0.00 0.01 0.02 0.03 0.05 0.10 0.61 0.15 0.08 0.06 0.05 0.04 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 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Discarded (cfs) 0.00 0.01 0.02 0.03 0.05 0.10 0.61 0.15 0.08 0.06 0.05 0.04 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 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 2024-05-12 HydroCad - Proposed POA 2B-1 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Stage-Discharge for Pond 42P: Basin 9 Elevation (feet) 562.00 562.05 562.10 562.15 562.20 562.25 562.30 562.35 562.40 562.45 562.50 562.55 562.60 562.65 562.70 562.75 562.80 562.85 562.90 562.95 563.00 563.05 563.10 563.15 563.20 563.25 563.30 563.35 563.40 563.45 563.50 563.55 563.60 563.65 563.70 563.75 563.80 563.85 563.90 563.95 564.00 564.05 564.10 564.15 564.20 564.25 564.30 564.35 564.40 Discharge (cfs) 0.00 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.62 0.65 0.67 0.69 0.70 0.72 0.73 0.74 0.75 0.76 0.77 0.78 0.78 0.79 0.80 0.81 0.81 0.82 0.83 0.98 1.25 1.60 2.01 2.47 2.98 3.53 4.11 Discarded (cfs) 0.00 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 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 0.04 0.06 0.08 0.10 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18 0.19 0.19 0.20 0.21 0.21 0.22 0.37 0.64 0.99 1.40 1.87 2.37 2.92 3.51 Printed 10/25/2024 Page 197

POA-2 2024-05-12 HydroCad - Proposed POA 2B-1 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 42P: Basin 9 Elevation (feet) 562.00 562.05 562.10 562.15 562.20 562.25 562.30 562.35 562.40 562.45 562.50 562.55 562.60 562.65 562.70 562.75 562.80 562.85 562.90 562.95 563.00 563.05 563.10 563.15 563.20 563.25 563.30 563.35 563.40 563.45 563.50 563.55 563.60 563.65 563.70 563.75 563.80 563.85 563.90 563.95 564.00 564.05 564.10 564.15 564.20 564.25 564.30 564.35 564.40 Surface (sq-ft) 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 6,534 Storage (cubic-feet) 0 131 261 392 523 653 784 915 1,045 1,176 1,307 1,437 1,568 1,699 1,830 1,960 2,091 2,222 2,352 2,483 2,614 2,744 2,875 3,006 3,136 3,267 3,398 3,528 3,659 3,790 3,920 4,051 4,182 4,312 4,443 4,574 4,704 4,835 4,966 5,097 5,227 5,358 5,489 5,619 5,750 5,881 6,011 6,142 6,273 Printed 10/25/2024 Page 198

POA-2 2024-05-12 HydroCad - Proposed POA 2B-1 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 199 Summary for Pond 48P: Basin 8 Inflow Area = 61,044 sf, 62.67% Impervious, Inflow Depth = 4.17" for 10-Year event Inflow = 5.52 cfs @ 12.16 hrs, Volume= 21,218 cf Outflow = 2.83 cfs @ 12.29 hrs, Volume= 21,218 cf, Atten= 49%, Lag= 8.2 min Discarded = 2.83 cfs @ 12.29 hrs, Volume= 21,218 cf Primary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routed to Pond 49P : Basin 7 Routing by Stor-Ind method, Time Span= 0.00-80.00 hrs, dt= 0.04 hrs Peak Elev= 573.44' @ 12.29 hrs Surf.Area= 10,019 sf Storage= 1,768 cf Plug-Flow detention time= 2.6 min calculated for 21,207 cf (100% of inflow) Center-of-Mass det. time= 2.6 min ( 775.9 - 773.3 ) Volume #1 Invert 573.00' Elevation (feet) 573.00 574.00 575.00 576.00 Device #1 #2 #3 Avail.Storage 12,023 cf Surf.Area (sq-ft) 10,019 10,019 10,019 10,019 Routing Primary Primary Discarded Invert 575.00' 573.45' 573.00' Storage Description Custom Stage Data (Prismatic) Listed below (Recalc) 30,057 cf Overall x 40.0% Voids Inc.Store (cubic-feet) 0 10,019 10,019 10,019 Cum.Store (cubic-feet) 0 10,019 20,038 30,057 Outlet Devices 4.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) 6.0" Vert. Orifice C= 0.600 Limited to weir flow at low heads 10.000 in/hr Exfiltration over Surface area Conductivity to Groundwater Elevation = 571.00' Discarded OutFlow Max=2.83 cfs @ 12.29 hrs HW=573.44' (Free Discharge) 3=Exfiltration ( Controls 2.83 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=573.00' (Free Discharge) 1=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 2=Orifice ( Controls 0.00 cfs) Pond 48P: Basin 8 Sharp-Crested Rectangular Weir Orifice Exfiltration

POA-2 NOAA 24-hr D 10-Year Rainfall=5.22" 2024-05-12 HydroCad - Proposed POA 2B-1 Printed 10/25/2024 Page 200 Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Pond 48P: Basin 8 Hydrograph 5.52 cfs Inflow Area=61,044 sf Peak Elev=573.44' Storage=1,768 cf 6 5 Inflow Outflow Discarded Primary Flow (cfs) 4 2.83 cfs 2.83 cfs 3 2 1 0.00 cfs 0 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 2 4 6 8 10 Discharge (cfs) 12 14 16 18