Revised Stormwater Management Report

POA 1 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 77 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 = 3.19" for 100-Year event Inflow = 33.46 cfs @ 12.18 hrs, Volume= 100,659 cf Outflow = 1.18 cfs @ 14.57 hrs, Volume= 89,978 cf, Atten= 96%, Lag= 143.3 min Primary = 1.18 cfs @ 14.57 hrs, Volume= 89,978 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= 545.56' @ 14.57 hrs Surf.Area= 36,933 sf Storage= 71,431 cf Plug-Flow detention time= 788.4 min calculated for 89,978 cf (89% of inflow) Center-of-Mass det. time= 736.4 min ( 1,523.2 - 786.8 ) 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=1.18 cfs @ 14.57 hrs HW=545.56' (Free Discharge) 1=Grate ( Controls 0.00 cfs) 2=Orifice (Orifice Controls 1.18 cfs @ 6.01 fps)

POA 1 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 78 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Pond 16P: Basin 1 Hydrograph Inflow Primary 33.46 cfs 36 Inflow Area=378,971 sf Peak Elev=545.56' Storage=71,431 cf 34 32 30 28 26 Flow (cfs) 24 22 20 18 16 14 12 10 8 6 4 1.18 cfs 2 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 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 79 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 0.06 0.10 0.15 0.34 0.78 10.45 1.43 0.78 0.53 0.45 0.38 0.32 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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) 0 183 783 1,624 3,318 6,933 21,716 71,169 70,157 66,628 62,126 57,534 52,891 46,476 40,464 35,112 30,428 26,417 23,072 20,442 18,459 16,958 15,802 14,893 14,163 13,570 13,075 12,662 12,309 12,004 11,740 11,511 11,309 11,126 10,962 10,815 10,682 Elevation (feet) 543.50 543.51 543.52 543.55 543.60 543.71 544.15 545.55 545.52 545.43 545.30 545.18 545.05 544.87 544.70 544.54 544.41 544.29 544.19 544.12 544.06 544.01 543.98 543.95 543.93 543.91 543.90 543.88 543.87 543.86 543.86 543.85 543.84 543.84 543.83 543.83 543.82 Primary (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.37 1.18 1.17 1.13 1.08 1.03 0.97 0.88 0.79 0.70 0.60 0.51 0.42 0.32 0.24 0.18 0.14 0.11 0.09 0.08 0.06 0.05 0.05 0.04 0.03 0.03 0.03 0.02 0.02 0.02 0.02

POA 1 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 80 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 Primar

4 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 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 81 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 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 82 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 = 8.21" for 100-Year event Inflow = 9.58 cfs @ 12.10 hrs, Volume= 31,869 cf Outflow = 6.04 cfs @ 12.13 hrs, Volume= 31,869 cf, Atten= 37%, Lag= 1.7 min Discarded = 1.37 cfs @ 11.57 hrs, Volume= 26,451 cf Primary = 4.67 cfs @ 12.13 hrs, Volume= 5,418 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= 579.76' @ 12.13 hrs Surf.Area= 14,810 sf Storage= 4,513 cf Plug-Flow detention time= 8.7 min calculated for 31,869 cf (100% of inflow) Center-of-Mass det. time= 8.7 min ( 749.8 - 741.1 ) 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 @ 11.57 hrs HW=579.05' (Free Discharge) 2=Exfiltration (Exfiltration Controls 1.37 cfs) Primary OutFlow Max=4.66 cfs @ 12.13 hrs HW=579.76' (Free Discharge) 1=Sharp-Crested Rectangular Weir (Weir Controls 4.66 cfs @ 2.34 fps)

POA 1 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 83 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Pond 18P: Basin 5 Hydrograph 9.58 cfs Inflow Area=46,603 sf Peak Elev=579.76' Storage=4,513 cf 10 9 Inflow Outflow Discarded Primary 8 6.04 cfs Flow (cfs) 7 6 4.67 cfs 5 4 3 1.37 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 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 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 84 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 0.08 0.12 0.14 0.23 0.41 5.72 0.45 0.25 0.17 0.14 0.12 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 17 27 33 52 93 2,560 104 57 39 33 28 23 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) 579.00 579.00 579.00 579.01 579.01 579.02 579.43 579.02 579.01 579.01 579.01 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 579.00 Outflow (cfs) 0.00 0.08 0.12 0.14 0.22 0.41 2.38 0.45 0.25 0.17 0.14 0.12 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 0.08 0.12 0.14 0.22 0.41 1.37 0.45 0.25 0.17 0.14 0.12 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 1.01 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

POA 1 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 85 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