09 Stormwater Mgmt Report 122025

NOAA 24-hr D 2-Year-Current Rainfall=3.47", P2=3.47" NJA230139 - REV 2 Prepared by Bohler Engineering, PC HydroCAD® 10.20-7a s/n 03478 © 2025 HydroCAD Software Solutions LLC Printed 12/11/2025 Page 11 Summary for Subcatchment P1p: Proposed Pervious Runoff = 0.00 cfs @ 23.90 hrs, Volume= Routed to Link P1 : PDA 1A 2 cf, Depth= 0.01" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.10 hrs NOAA 24-hr D 2-Year-Current Rainfall=3.47", P2=3.47" Area (ac) 0.090 0.090 CN 39 39 Description >75% Grass cover, Good, HSG A 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.7 85 0.0500 0.25 Sheet Flow, Grass: Short n= 0.150 P2= 3.47" 0.2 15 0.0400 1.29 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" 0.5 121 0.0400 4.06 Shallow Concentrated Flow, Paved Kv= 20.3 fps 2.0 287 0.0140 2.40 Shallow Concentrated Flow, Paved Kv= 20.3 fps 0.1 20 0.6600 4.06 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 8.5 528 Total Subcatchment P1p: Proposed Pervious Hydrograph 0.000 NOAA 24-hr D 2-Year-Current Rainfall=3.47" P2=3.47" Runoff Area=0.090 ac Runoff Volume=2 cf Runoff Depth=0.01" Flow Length=528' Tc=8.5 min CN=39/0 0.000 0.000 0.000 0.000 0.000 Flow (cfs) Runoff 0.00 cfs 0.000 0 0 0 0 0 0 0 0 0 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)

NOAA 24-hr D 2-Year-Current Rainfall=3.47", P2=3.47" NJA230139 - REV 2 Prepared by Bohler Engineering, PC HydroCAD® 10.20-7a s/n 03478 © 2025 HydroCAD Software Solutions LLC Printed 12/11/2025 Page 12 Summary for Pond PP1: Pervious Pavement Inflow Area = 11,761 sf,100.00% Impervious, Inflow Depth = 3.24" for 2-Year-Current event Inflow = 0.77 cfs @ 12.04 hrs, Volume= 3,172 cf Outflow = 0.54 cfs @ 12.15 hrs, Volume= 2,148 cf, Atten= 30%, Lag= 6.5 min Primary = 0.54 cfs @ 12.15 hrs, Volume= 2,148 cf Routed to Link P1 : PDA 1A Routing by Dyn-Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs / 9 Peak Elev= 367.07' @ 12.15 hrs Surf.Area= 8,538 sf Storage= 1,436 cf Plug-Flow detention time= 224.1 min calculated for 2,145 cf (68% of inflow) Center-of-Mass det. time= 118.6 min ( 870.0 - 751.4 ) Volume #1 Invert 366.65' Elevation (feet) 366.65 367.65 Avail.Storage 3,415 cf Surf.Area (sq-ft) 8,538 8,538 Device #1 Routing Primary Invert 365.50' #2 Device 1 366.95' Storage Description Custom Stage Data (Prismatic)Listed below (Recalc) 8,538 cf Overall x 40.0% Voids Inc.Store (cubic-feet) 0 8,538 Cum.Store (cubic-feet) 0 8,538 Outlet Devices 15.0" Round RCP_Round 15" L= 273.0' RCP, groove end projecting, Ke= 0.200 Inlet / Outlet Invert= 365.50' / 364.15' S= 0.0049 '/' Cc= 0.900 n= 0.011 Concrete pipe, straight & clean, Flow Area= 1.23 sf 4.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) Primary OutFlow Max=0.52 cfs @ 12.15 hrs HW=367.07' TW=0.00' (Dynamic Tailwater) 1=RCP_Round 15" (Passes 0.52 cfs of 5.70 cfs potential flow) 2=Sharp-Crested Rectangular Weir (Weir Controls 0.52 cfs @ 1.12 fps)

NOAA 24-hr D 2-Year-Current Rainfall=3.47", P2=3.47" NJA230139 - REV 2 Prepared by Bohler Engineering, PC HydroCAD® 10.20-7a s/n 03478 © 2025 HydroCAD Software Solutions LLC Printed 12/11/2025 Page 13 Pond PP1: Pervious Pavement Hydrograph 0.85 0.8 0.75 0.7 0.65 0.6 Inflow Primary 0.77 cfs 0.54 cfs Inflow Area=11,761 sf Peak Elev=367.07' Storage=1,436 cf Flow (cfs) 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 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)

NOAA 24-hr D 2-Year-Current Rainfall=3.47", P2=3.47" NJA230139 - REV 2 Prepared by Bohler Engineering, PC HydroCAD® 10.20-7a s/n 03478 © 2025 HydroCAD Software Solutions LLC Printed 12/11/2025 Page 14 Summary for Link E1: EDA 1A Inflow Area = Inflow = Primary = 84,942 sf, 98.97% Impervious, Inflow Depth = 3.20" for 2-Year-Current event 6.36 cfs @ 12.09 hrs, Volume= 22,676 cf 6.36 cfs @ 12.09 hrs, Volume= 22,676 cf, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Link E1: EDA 1A Hydrograph 7 6.36 cfs 6.36 cfs Inflow Primary Inflow Area=84,942 sf 6 Flow (cfs) 5 4 3 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)

NOAA 24-hr D 2-Year-Current Rainfall=3.47", P2=3.47" NJA230139 - REV 2 Prepared by Bohler Engineering, PC HydroCAD® 10.20-7a s/n 03478 © 2025 HydroCAD Software Solutions LLC Printed 12/11/2025 Page 15 Summary for Link P1: PDA 1A Inflow Area = Inflow = Primary = 85,378 sf, 95.41% Impervious, Inflow Depth = 2.94" for 2-Year-Current event 5.78 cfs @ 12.09 hrs, Volume= 20,948 cf 5.78 cfs @ 12.09 hrs, Volume= 20,948 cf, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Link P1: PDA 1A Hydrograph 6 5.78 cfs 5.78 cfs Inflow Primary Inflow Area=85,378 sf 5 Flow (cfs) 4 3 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)

NOAA 24-hr D 10-Year-Current Rainfall=5.38", P2=3.47" NJA230139 - REV 2 Prepared by Bohler Engineering, PC HydroCAD® 10.20-7a s/n 03478 © 2025 HydroCAD Software Solutions LLC Printed 12/11/2025 Page 16 Time span=0.00-72.00 hrs, dt=0.10 hrs, 721 points x 9 Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv. Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=1.930 ac 100.00% Impervious Runoff Depth=5.14" Flow Length=441' Tc=3.2 min CN=0/98 Runoff=9.92 cfs 36,029 cf Subcatchment E1i: Existing Impervious Runoff Area=0.020 ac 0.00% Impervious Runoff Depth=0.28" Flow Length=526' Tc=8.6 min CN=39/0 Runoff=0.00 cfs 21 cf Subcatchment E1p: Existing Pervious Subcatchment P1i: Proposed Impervious Runoff Area=1.600 ac 100.00% Impervious Runoff Depth=5.14" Flow Length=443' Tc=3.1 min CN=0/98 Runoff=8.22 cfs 29,868 cf Runoff Area=0.270 ac 100.00% Impervious Runoff Depth=5.14" Flow Length=30' Slope=0.0150 '/' Tc=0.5 min CN=0/98 Runoff=1.21 cfs 5,040 cf Subcatchment P1i(pp): Proposed Subcatchment P1p: Proposed Pervious Pond PP1: Pervious Pavement Runoff Area=0.090 ac 0.00% Impervious Runoff Depth=0.28" Flow Length=528' Tc=8.5 min CN=39/0 Runoff=0.01 cfs 93 cf Peak Elev=367.13' Storage=1,626 cf Inflow=1.21 cfs 5,040 cf Outflow=0.96 cfs 4,016 cf Link E1: EDA 1A Inflow=9.92 cfs 36,049 cf Primary=9.92 cfs 36,049 cf Link P1: PDA 1A Inflow=9.16 cfs 33,977 cf Primary=9.16 cfs 33,977 cf Total Runoff Area = 170,320 sf Runoff Volume = 71,050 cf Average Runoff Depth = 5.01" 2.81% Pervious = 4,792 sf 97.19% Impervious = 165,528 sf

NOAA 24-hr D 10-Year-Current Rainfall=5.38", P2=3.47" NJA230139 - REV 2 Prepared by Bohler Engineering, PC HydroCAD® 10.20-7a s/n 03478 © 2025 HydroCAD Software Solutions LLC Printed 12/11/2025 Page 17 Summary for Subcatchment E1i: Existing Impervious Runoff = 9.92 cfs @ 12.09 hrs, Volume= Routed to Link E1 : EDA 1A 36,029 cf, Depth= 5.14" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.10 hrs NOAA 24-hr D 10-Year-Current Rainfall=5.38", P2=3.47" Area (ac) 1.930 1.930 CN 98 98 Description Paved parking, HSG A 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.9 100 0.0400 1.89 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" 0.1 36 0.0400 4.06 Shallow Concentrated Flow, Paved Kv= 20.3 fps 2.1 285 0.0120 2.22 Shallow Concentrated Flow, Paved Kv= 20.3 fps 0.1 20 0.6600 4.06 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 3.2 441 Total Subcatchment E1i: Existing Impervious Hydrograph 11 10 NOAA 24-hr D 10-Year-Current Rainfall=5.38" P2=3.47" Runoff Area=1.930 ac Runoff Volume=36,029 cf Runoff Depth=5.14" Flow Length=441' Tc=3.2 min CN=0/98 9 8 7 Flow (cfs) Runoff 9.92 cfs 6 5 4 3 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)

NOAA 24-hr D 10-Year-Current Rainfall=5.38", P2=3.47" NJA230139 - REV 2 Prepared by Bohler Engineering, PC HydroCAD® 10.20-7a s/n 03478 © 2025 HydroCAD Software Solutions LLC Printed 12/11/2025 Page 18 Summary for Subcatchment E1p: Existing Pervious Runoff = 0.00 cfs @ 12.60 hrs, Volume= Routed to Link E1 : EDA 1A 21 cf, Depth= 0.28" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.10 hrs NOAA 24-hr D 10-Year-Current Rainfall=5.38", P2=3.47" Area (ac) 0.020 0.020 CN 39 39 Description >75% Grass cover, Good, HSG A 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.7 85 0.0500 0.25 Sheet Flow, Grass: Short n= 0.150 P2= 3.47" 0.2 15 0.0400 1.29 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" 0.5 121 0.0400 4.06 Shallow Concentrated Flow, Paved Kv= 20.3 fps 2.1 285 0.0120 2.22 Shallow Concentrated Flow, Paved Kv= 20.3 fps 0.1 20 0.6600 4.06 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 8.6 526 Total Subcatchment E1p: Existing Pervious Flow (cfs) Hydrograph Runoff 0.00 cfs 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 0 NOAA 24-hr D 10-Year-Current Rainfall=5.38" P2=3.47" Runoff Area=0.020 ac Runoff Volume=21 cf Runoff Depth=0.28" Flow Length=526' Tc=8.6 min CN=39/0 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)

NOAA 24-hr D 10-Year-Current Rainfall=5.38", P2=3.47" NJA230139 - REV 2 Prepared by Bohler Engineering, PC HydroCAD® 10.20-7a s/n 03478 © 2025 HydroCAD Software Solutions LLC Printed 12/11/2025 Page 19 Summary for Subcatchment P1i: Proposed Impervious Runoff = 8.22 cfs @ 12.09 hrs, Volume= Routed to Link P1 : PDA 1A 29,868 cf, Depth= 5.14" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.10 hrs NOAA 24-hr D 10-Year-Current Rainfall=5.38", P2=3.47" Area (ac) 1.600 1.600 CN 98 98 Description Paved parking, HSG A 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.9 100 0.0400 1.89 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" 0.1 36 0.0400 4.06 Shallow Concentrated Flow, Paved Kv= 20.3 fps 2.0 287 0.0140 2.40 Shallow Concentrated Flow, Paved Kv= 20.3 fps 0.1 20 0.6600 4.06 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 3.1 443 Total Subcatchment P1i: Proposed Impervious Hydrograph 9 NOAA 24-hr D 10-Year-Current Rainfall=5.38" P2=3.47" Runoff Area=1.600 ac Runoff Volume=29,868 cf Runoff Depth=5.14" Flow Length=443' Tc=3.1 min CN=0/98 8 7 6 Flow (cfs) Runoff 8.22 cfs 5 4 3 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)

NOAA 24-hr D 10-Year-Current Rainfall=5.38", P2=3.47" NJA230139 - REV 2 Prepared by Bohler Engineering, PC HydroCAD® 10.20-7a s/n 03478 © 2025 HydroCAD Software Solutions LLC Printed 12/11/2025 Page 20 Summary for Subcatchment P1i(pp): Proposed Impervious Runoff = 1.21 cfs @ 12.04 hrs, Volume= Routed to Pond PP1 : Pervious Pavement 5,040 cf, Depth= 5.14" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.10 hrs NOAA 24-hr D 10-Year-Current Rainfall=5.38", P2=3.47" Area (ac) 0.270 0.270 CN 98 98 Description Paved parking, HSG A 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.5 30 0.0150 1.00 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" Subcatchment P1i(pp): Proposed Impervious Hydrograph Runoff 1.21 cfs NOAA 24-hr D 10-Year-Current Rainfall=5.38" P2=3.47" Runoff Area=0.270 ac Runoff Volume=5,040 cf Runoff Depth=5.14" Flow Length=30' Slope=0.0150 '/' Tc=0.5 min CN=0/98 Flow (cfs) 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)