Revised Stormwater Management Report

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 (cfs) 22.07 23.18 24.32 25.48 26.65 27.84 29.05 30.28 31.53 32.79 34.07 35.37 36.68 38.01 39.36 40.72 42.10 43.49 44.90 46.32 47.76 49.22 50.69

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 19 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 16P: Basin 1 Elevation (feet) 543.50 543.55 543.60 543.65 543.70 543.75 543.80 543.85 543.90 543.95 544.00 544.05 544.10 544.15 544.20 544.25 544.30 544.35 544.40 544.45 544.50 544.55 544.60 544.65 544.70 544.75 544.80 544.85 544.90 544.95 545.00 545.05 545.10 545.15 545.20 545.25 545.30 545.35 545.40 545.45 545.50 545.55 545.60 545.65 545.70 545.75 545.80 545.85 545.90 545.95 546.00 Surface (sq-ft) 32,670 32,757 32,844 32,931 33,018 33,106 33,193 33,280 33,367 33,454 33,541 33,650 33,759 33,868 33,977 34,086 34,194 34,303 34,412 34,521 34,630 34,739 34,848 34,957 35,066 35,175 35,283 35,392 35,501 35,610 35,719 35,828 35,937 36,046 36,155 36,264 36,372 36,481 36,590 36,699 36,808 36,917 37,026 37,135 37,244 37,353 37,461 37,570 37,679 37,788 37,897 Storage (cubic-feet) 0 1,636 3,276 4,920 6,569 8,222 9,879 11,541 13,207 14,878 16,553 18,233 19,918 21,608 23,305 25,006 26,713 28,426 30,143 31,867 33,596 35,330 37,069 38,815 40,565 42,321 44,083 45,849 47,622 49,400 51,183 52,971 54,766 56,565 58,370 60,181 61,996 63,818 65,645 67,477 69,315 71,158 73,006 74,860 76,720 78,585 80,455 82,331 84,212 86,099 87,991 Elevation (feet) 546.05 546.10 546.15 546.20 546.25 546.30 546.35 546.40 546.45 546.50 546.55 546.60 546.65 546.70 546.75 546.80 546.85 546.90 546.95 547.00 Surface (sq-ft) 37,984 38,071 38,158 38,246 38,333 38,420 38,507 38,594 38,681 38,769 38,856 38,943 39,030 39,117 39,204 39,291 39,379 39,466 39,553 39,640 Storage (cubic-feet) 89,888 91,789 93,695 95,605 97,519 99,438 101,361 103,289 105,221 107,157 109,098 111,043 112,992 114,946 116,904 118,866 120,833 122,804 124,779 126,759

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 20 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Pond 18P: Basin 5 Inflow Area = 46,603 sf, 92.63% Impervious, Inflow Depth = 3.06" for 2-Year event Inflow = 3.68 cfs @ 12.10 hrs, Volume= 11,878 cf Outflow = 1.37 cfs @ 11.95 hrs, Volume= 11,878 cf, Atten= 63%, Lag= 0.0 min Discarded = 1.37 cfs @ 11.95 hrs, Volume= 11,878 cf Primary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routed to Pond 16P : Basin 1 Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs Peak Elev= 579.23' @ 12.16 hrs Surf.Area= 14,810 sf Storage= 1,374 cf Plug-Flow detention time= 6.0 min calculated for 11,877 cf (100% of inflow) Center-of-Mass det. time= 6.0 min ( 762.1 - 756.1 ) Volume #1 Invert 579.00' Elevation (feet) 579.00 580.00 581.00 582.00 583.00 584.00 584.30 Device #1 #2 Avail.Storage 31,397 cf Surf.Area (sq-ft) 14,810 14,810 14,810 14,810 14,810 14,810 14,810 Routing Primary Discarded Invert 579.25' 579.00' Storage Description Custom Stage Data (Prismatic) Listed below 78,493 cf Overall x 40.0% Voids Inc.Store (cubic-feet) 0 14,810 14,810 14,810 14,810 14,810 4,443 Cum.Store (cubic-feet) 0 14,810 29,620 44,430 59,240 74,050 78,493 Outlet Devices 4.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) 4.000 in/hr Exfiltration over Surface area Discarded OutFlow Max=1.37 cfs @ 11.95 hrs HW=579.06' (Free Discharge) 2=Exfiltration (Exfiltration Controls 1.37 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=579.00' (Free Discharge) 1=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs)

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 21 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Pond 18P: Basin 5 Hydrograph 3.68 cfs Inflow Area=46,603 sf Peak Elev=579.23' Storage=1,374 cf 4 Inflow Outflow Discarded Primary Flow (cfs) 3 2 1.37 cfs 1.37 cfs 1 0.00 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 18P: Basin 5 Stage-Discharge Total Discarded Primary 584 Elevation (feet) 583 582 581 580 Sharp-Crested Exfiltration Rectangular Weir 579 0 10 20 30 40 50 60 Discharge (cfs) 70 80 90 100 110

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 22 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Pond 18P: Basin 5 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 0.05 0.08 0.15 2.18 0.17 0.10 0.06 0.06 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 Storage (cubic-feet) 0 3 8 11 18 34 478 40 22 15 13 11 9 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) 579.00 579.00 579.00 579.00 579.00 579.01 579.08 579.01 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 Outflow (cfs) 0.00 0.01 0.03 0.05 0.08 0.15 1.37 0.18 0.10 0.07 0.06 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 Discarded (cfs) 0.00 0.01 0.03 0.05 0.08 0.15 1.37 0.18 0.10 0.07 0.06 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 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

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 23 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Stage-Discharge for Pond 18P: Basin 5 Elevation (feet) 579.00 579.10 579.20 579.30 579.40 579.50 579.60 579.70 579.80 579.90 580.00 580.10 580.20 580.30 580.40 580.50 580.60 580.70 580.80 580.90 581.00 581.10 581.20 581.30 581.40 581.50 581.60 581.70 581.80 581.90 582.00 582.10 582.20 582.30 582.40 582.50 582.60 582.70 582.80 582.90 583.00 583.10 583.20 583.30 583.40 583.50 583.60 583.70 583.80 583.90 584.00 Discharge (cfs) 0.00 1.37 1.37 1.52 2.13 2.99 4.03 5.23 6.56 8.00 9.55 11.19 12.91 14.71 16.57 18.51 20.50 22.55 24.66 26.81 29.00 31.24 33.52 35.83 38.17 40.55 42.96 45.39 47.84 50.32 52.82 55.34 57.87 60.42 62.98 65.55 68.14 70.73 73.33 75.94 78.55 81.16 83.78 86.39 89.01 91.62 94.23 96.84 99.44 102.03 104.62 Discarded (cfs) 0.00 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 1.37 Primary (cfs) 0.00 0.00 0.00 0.15 0.75 1.61 2.66 3.86 5.19 6.63 8.18 9.81 11.54 13.33 15.20 17.14 19.13 21.18 23.28 25.44 27.63 29.87 32.14 34.46 36.80 39.18 41.58 44.02 46.47 48.95 51.45 53.96 56.50 59.05 61.61 64.18 66.77 69.36 71.96 74.56 77.18 79.79 82.40 85.02 87.64 90.25 92.86 95.47 98.07 100.66 103.25 Elevation (feet) 584.10 584.20 584.30 Discharge (cfs) 107.20 109.77 112.33 Discarded (cfs) 1.37 1.37 1.37 Primary (cfs) 105.83 108.40 110.96

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 24 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 18P: Basin 5 Elevation (feet) 579.00 579.10 579.20 579.30 579.40 579.50 579.60 579.70 579.80 579.90 580.00 580.10 580.20 580.30 580.40 580.50 580.60 580.70 580.80 580.90 581.00 581.10 581.20 581.30 581.40 581.50 581.60 581.70 581.80 581.90 582.00 582.10 582.20 582.30 582.40 582.50 582.60 582.70 582.80 582.90 583.00 583.10 583.20 583.30 583.40 583.50 583.60 583.70 583.80 583.90 584.00 Surface (sq-ft) 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 14,810 Storage (cubic-feet) 0 592 1,185 1,777 2,370 2,962 3,554 4,147 4,739 5,332 5,924 6,516 7,109 7,701 8,294 8,886 9,478 10,071 10,663 11,256 11,848 12,440 13,033 13,625 14,218 14,810 15,402 15,995 16,587 17,180 17,772 18,364 18,957 19,549 20,142 20,734 21,326 21,919 22,511 23,104 23,696 24,288 24,881 25,473 26,066 26,658 27,250 27,843 28,435 29,028 29,620 Elevation (feet) 584.10 584.20 584.30 Surface (sq-ft) 14,810 14,810 14,810 Storage (cubic-feet) 30,212 30,805 31,397

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 25 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Pond 24P: Basin 6 Inflow Area = 180,292 sf, 63.14% Impervious, Inflow Depth = 2.47" for 2-Year event Inflow = 11.49 cfs @ 12.11 hrs, Volume= 37,057 cf Outflow = 8.49 cfs @ 12.15 hrs, Volume= 37,057 cf, Atten= 26%, Lag= 2.3 min Discarded = 8.27 cfs @ 12.05 hrs, Volume= 36,997 cf Primary = 0.22 cfs @ 12.15 hrs, Volume= 60 cf Routed to Pond 16P : Basin 1 Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs Peak Elev= 600.07' @ 12.15 hrs Surf.Area= 35,719 sf Storage= 995 cf Plug-Flow detention time= 0.5 min calculated for 37,052 cf (100% of inflow) Center-of-Mass det. time= 0.5 min ( 775.4 - 774.8 ) Volume #1 Invert 600.00' Elevation (feet) 600.00 601.00 601.42 Device #1 #2 Avail.Storage 20,288 cf Surf.Area (sq-ft) 35,719 35,719 35,719 Routing Primary Discarded Invert 600.02' 600.00' Storage Description Custom Stage Data (Prismatic) Listed below (Recalc) 50,721 cf Overall x 40.0% Voids Inc.Store (cubic-feet) 0 35,719 15,002 Cum.Store (cubic-feet) 0 35,719 50,721 Outlet Devices 6.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) 10.000 in/hr Exfiltration over Surface area Discarded OutFlow Max=8.27 cfs @ 12.05 hrs HW=600.01' (Free Discharge) 2=Exfiltration (Exfiltration Controls 8.27 cfs) Primary OutFlow Max=0.21 cfs @ 12.15 hrs HW=600.07' (Free Discharge) 1=Sharp-Crested Rectangular Weir (Weir Controls 0.21 cfs @ 0.73 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 26 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Pond 24P: Basin 6 Hydrograph 11.49 cfs Inflow Area=180,292 sf Peak Elev=600.07' Storage=995 cf 12 11 8.49 cfs 10 Inflow Outflow Discarded Primary 8.27 cfs 9 Flow (cfs) 8 7 6 5 4 3 2 1 0 0.22 cfs 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 24P: Basin 6 Stage-Discharge Total Discarded Primary Elevation (feet) 601 Exfiltration Sharp-Crested Rectangular Weir 600 0 5 10 15 20 Discharge (cfs) 25 30 35

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 27 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Pond 24P: Basin 6 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 0.03 0.09 0.13 0.21 0.40 6.54 0.59 0.33 0.22 0.19 0.17 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 2 3 5 10 158 14 8 6 5 4 3 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) 600.00 600.00 600.00 600.00 600.00 600.00 600.01 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 600.00 Outflow (cfs) 0.00 0.03 0.09 0.13 0.21 0.40 6.45 0.59 0.33 0.23 0.19 0.17 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 0.09 0.13 0.21 0.40 6.45 0.59 0.33 0.23 0.19 0.17 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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