Drainage Report

Basdin 2-2 without Exfiltration Proposed Basin 2-2 R5 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 19 Pond 42P: Pond 2-2 Hydrograph Inflow 5.27 cfs Primary Inflow Area=1.412 ac 5 Peak Elev=543.84' 4 Storage=13,078 cf Flow (cfs) 3 2 1 0.61 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)

Basdin 2-2 without Exfiltration Proposed Basin 2-2 R5 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 20 Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv. Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 36S: Basin 2-2 Runoff Area=61,497 sf Runoff Depth=7.49" Flow Length=606' Tc=10.0 min CN=80/98 Runoff=9.35 cfs 0.881 af Subcatchment 45S: Basin 2-2 pre-development Runoff Area=62,290 sf Runoff Depth=5.04" Flow Length=130' Tc=13.3 min CN=70/0 Runoff=6.47 cfs 0.600 af Pond 42P: Pond 2-2 Peak Elev=544.88' Storage=20,478 cf Inflow=9.35 cfs 0.881 af Outflow=2.02 cfs 0.684 af Total Runoff Area = 2.842 ac Runoff Volume = 1.481 af Average Runoff Depth = 6.25"

Basdin 2-2 without Exfiltration Proposed Basin 2-2 R5 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 21 Summary for Subcatchment 36S: Basin 2-2 [47] Hint: Peak is 658% of capacity of segment #3 Runoff = 9.35 cfs @ 12.17 hrs, Volume= 0.881 af, Depth= 7.49" Routed to Pond 42P : Pond 2-2 Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NOAA 24-hr D 100-Year Rainfall=8.66" Area (sf) CN Description 34,605 98 Paved parking, HSG C 19,780 74 >75% Grass cover, Good, HSG C 7,112 98 Water Surface, 0% imp, HSG C 61,497 90 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.0 60 0.1300 0.34 Sheet Flow, Grass: Short n= 0.150 P2= 3.44" 0.5 120 0.0450 4.31 Shallow Concentrated Flow, Paved Kv= 20.3 fps 1.1 426 0.0350 6.20 1.42 Pipe Channel, 12.0" Round w/ 8.0" inside fill Area= 0.2 sf Perim= 2.2' r= 0.11' n= 0.010 4.6 606 Total, Increased to minimum Tc = 10.0 min

Basdin 2-2 without Exfiltration Proposed Basin 2-2 R5 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 22 Subcatchment 36S: Basin 2-2 Hydrograph Runoff 10 9.35 cfs 9 NOAA 24-hr D 8 100-Year Rainfall=8.66" 7 Runoff Area=61,497 sf Runoff Volume=0.881 af 6 Flow (cfs) Runoff Depth=7.49" 5 Flow Length=606' 4 Tc=10.0 min 3 CN=80/98 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)

Basdin 2-2 without Exfiltration Proposed Basin 2-2 R5 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 23 Summary for Subcatchment 45S: Basin 2-2 pre-development Runoff = 6.47 cfs @ 12.21 hrs, Volume= 0.600 af, Depth= 5.04" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NOAA 24-hr D 100-Year Rainfall=8.66" Area (sf) CN Description 62,290 70 Woods, Good, HSG C Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.5 100 0.0700 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.44" 0.7 30 0.0200 0.71 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 13.3 130 Total Subcatchment 45S: Basin 2-2 pre-development Hydrograph 7 Runoff 6.47 cfs NOAA 24-hr D 6 100-Year Rainfall=8.66" 5 Runoff Area=62,290 sf Runoff Volume=0.600 af Flow (cfs) 4 Runoff Depth=5.04" 3

ume=0.600 af Flow (cfs) 4 Runoff Depth=5.04" 3 Flow Length=130' Tc=13.3 min 2 CN=70/0 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)

Basdin 2-2 without Exfiltration Proposed Basin 2-2 R5 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 24 Summary for Pond 42P: Pond 2-2 Inflow Area = 1.412 ac, Inflow Depth = 7.49" for 100-Year event Inflow = 9.35 cfs @ 12.17 hrs, Volume= 0.881 af Outflow = 2.02 cfs @ 12.62 hrs, Volume= 0.684 af, Atten= 78%, Lag= 26.8 min Primary = 2.02 cfs @ 12.62 hrs, Volume= 0.684 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 544.88' @ 12.62 hrs Surf.Area= 7,112 sf Storage= 20,478 cf Plug-Flow detention time= 288.3 min calculated for 0.684 af (78% of inflow) Center-of-Mass det. time= 200.4 min ( 968.8 - 768.5 ) Volume Invert Avail.Storage Storage Description #1 542.00' 28,448 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 542.00 7,112 0 0 546.00 7,112 28,448 28,448 Device Routing Invert Outlet Devices #1 Primary 543.20' 6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #2 Primary 543.75' 6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=2.02 cfs @ 12.62 hrs HW=544.88' (Free Discharge) 1=Orifice/Grate (Orifice Controls 1.13 cfs @ 5.76 fps) 2=Orifice/Grate (Orifice Controls 0.89 cfs @ 4.51 fps)

Basdin 2-2 without Exfiltration Proposed Basin 2-2 R5 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 25 Pond 42P: Pond 2-2 Hydrograph Inflow 9.35 cfs Primary 10 Inflow Area=1.412 ac 9 8 Peak Elev=544.88' 7 Storage=20,478 cf 6 Flow (cfs) 5 4 3 2.02 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)

45S basin 2-3 pre-development 40S 44P Basin 2-3 pond 2-3 Subcat Reach Pond Link Routing Diagram for Proposed Basin 2-3 R5 Prepared by Anderson Consulting Services, Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC

Basin 2-3 without exfiltration Proposed Basin 2-3 R5 Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 2 Project Notes Rainfall events imported from "NRCS-Rain.txt" for 6606 NJ Essex-D