Drainage Report

Basin 2-2 with exfil Proposed Basin 2-2 R3 Prepared by Anderson Consulting Services Printed 10/23/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 5 Ground Covers (selected nodes) HSG-A HSG-B HSG-C HSG-D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.000 0.454 0.000 0.000 0.454 >75% Grass cover, Good 36S 0.000 0.000 0.794 0.000 0.000 0.794 Paved parking 36S 0.000 0.000 0.163 0.000 0.000 0.163 Water Surface, 0% imp 36S 0.000 0.000 1.412 0.000 0.000 1.412 TOTAL AREA

Basin 2-2 with exfil Proposed Basin 2-2 R3 Prepared by Anderson Consulting Services Printed 10/23/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 6 Pipe Listing (selected nodes) Line# Node In-Invert Out-Invert Length Slope n Width Diam/Height Inside-Fill Node Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) Name 1 36S 0.00 0.00 426.0 0.0350 0.010 0.0 12.0 8.0

Basin 2-2 with exfil Proposed Basin 2-2 R3 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 10/23/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 7 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=2.51" Flow Length=606' Tc=10.0 min CN=80/98 Runoff=3.19 cfs 0.295 af Pond 42P: Pond 2-2 Peak Elev=543.11' Storage=7,908 cf Inflow=3.19 cfs 0.295 af Discarded=0.09 cfs 0.295 af Primary=0.00 cfs 0.000 af Outflow=0.09 cfs 0.295 af Total Runoff Area = 1.412 ac Runoff Volume = 0.295 af Average Runoff Depth = 2.51"

Basin 2-2 with exfil Proposed Basin 2-2 R3 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 10/23/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 8 Summary for Subcatchment 36S: Basin 2-2 [47] Hint: Peak is 225% of capacity of segment #3 Runoff = 3.19 cfs @ 12.17 hrs, Volume= 0.295 af, Depth= 2.51" 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 2-Year Rainfall=3.44" 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

Basin 2-2 with exfil Proposed Basin 2-2 R3 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 10/23/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 9 Subcatchment 36S: Basin 2-2 Hydrograph Runoff 3.19 cfs 3 NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=61,497 sf Runoff Volume=0.295 af Flow (cfs) 2 Runoff Depth=2.51" Flow Length=606' Tc=10.0 min 1 CN=80/98 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)

Basin 2-2 with exfil Proposed Basin 2-2 R3 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 10/23/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 10 Summary for Pond 42P: Pond 2-2 Inflow Area = 1.412 ac, Inflow Depth = 2.51" for 2-Year event Inflow = 3.19 cfs @ 12.17 hrs, Volume= 0.295 af Outflow = 0.09 cfs @ 17.29 hrs, Volume= 0.295 af, Atten= 97%, Lag= 306.9 min Discarded = 0.09 cfs @ 17.29 hrs, Volume= 0.295 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 543.11' @ 17.29 hrs Surf.Area= 7,112 sf Storage= 7,908 cf Plug-Flow detention time= 825.9 min calculated for 0.295 af (100% of inflow) Center-of-Mass det. time= 825.5 min ( 1,611.8 - 786.3 ) 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 Discarded 542.00' 0.450 in/hr Exfiltration over Horizontal area Conductivity to Groundwater Elevation = 538.00' #2 Primary 543.20' 6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Primary 543.75' 6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Discarded OutFlow Max=0.09 cfs @ 17.29 hrs HW=543.11' (Free Discharge) 1=Exfiltration ( Controls 0.09 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=542.00' (Free Discharge) 2=Orifice/Grate ( Controls 0.00 cfs) 3=Orifice/Grate ( Controls 0.00 cfs)

Basin 2-2 with exfil Proposed Basin 2-2 R3 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 10/23/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 11 Pond 42P: Pond 2-2 Hydrograph Inflow 3.19 cfs Outflow Inflow Area=1.412 ac Discarded Primary Peak Elev=543.11' 3 Storage=7,908 cf Flow (cfs) 2 1 0.09 cfs 0.09 cfs 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)

40S 44P Basin 2-3 pond 2-3 Subcat Reach Pond Link Routing Diagram for Proposed Basin 2-3 R3 Prepared by Anderson Consulting Services, Printed 10/23/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC

Basin 2-3 with exfiltration Proposed Basin 2-3 R3 Prepared by Anderson Consulting Services Printed 10/23/2023 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

Basin 2-3 with exfiltration Proposed Basin 2-3 R3 Prepared by Anderson Consulting Services Printed 10/23/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 3 Area Listing (selected nodes) Area CN Description (acres) (subcatchment-numbers) 0.959 74 >75% Grass cover, Good, HSG C (40S) 1.060 98 Roofs, HSG C (40S) 0.239 98 Water Surface, 0% imp, HSG C (40S) 2.259 88 TOTAL AREA