Drainage Report

36S 42P Basin 2-2 Pond 2-2 45S Basin 2-2 pre-development Subcat Reach Pond Link Routing Diagram for Proposed Basin 2-2 R5 Prepared by Anderson Consulting Services, Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC

Basdin 2-2 without Exfiltration Proposed Basin 2-2 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

Basdin 2-2 without Exfiltration Proposed Basin 2-2 R5 Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 3 Rainfall Events Listing (selected events) Event# Event Storm Type Curve Mode Duration B/B Depth AMC Name (hours) (inches) 1 2-Year NOAA 24-hr D Default 24.00 1 3.44 2 2 10-Year NOAA 24-hr D Default 24.00 1 5.22 2 3 100-Year NOAA 24-hr D Default 24.00 1 8.66 2

Basdin 2-2 without Exfiltration Proposed Basin 2-2 R5 Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 4 Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 0.454 74 >75% Grass cover, Good, HSG C (36S) 0.794 98 Paved parking, HSG C (36S) 0.163 98 Water Surface, 0% imp, HSG C (36S) 1.430 70 Woods, Good, HSG C (45S) 2.842 80 TOTAL AREA

Basdin 2-2 without Exfiltration Proposed Basin 2-2 R5 Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 5 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.000 HSG B 2.842 HSG C 36S, 45S 0.000 HSG D 0.000 Other 2.842 TOTAL AREA

Basdin 2-2 without Exfiltration Proposed Basin 2-2 R5 Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 6 Ground Covers (all 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 1.430 0.000 0.000 1.430 Woods, Good 45S 0.000 0.000 2.842 0.000 0.000 2.842 TOTAL AREA

Basdin 2-2 without Exfiltration Proposed Basin 2-2 R5 Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 7 Pipe Listing (all 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

Basdin 2-2 without Exfiltration Proposed Basin 2-2 R5 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 8 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 Subcatchment 45S: Basin 2-2 pre-development Runoff Area=62,290 sf Runoff Depth=0.97" Flow Length=130' Tc=13.3 min CN=70/0 Runoff=1.16 cfs 0.116 af Pond 42P: Pond 2-2 Peak Elev=543.40' Storage=9,963 cf Inflow=3.19 cfs 0.295 af Outflow=0.11 cfs 0.099 af Total Runoff Area = 2.842 ac Runoff Volume = 0.411 af Average Runoff Depth = 1.74"

Basdin 2-2 without Exfiltration Proposed Basin 2-2 R5 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 9 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

Basdin 2-2 without Exfiltration Proposed Basin 2-2 R5 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 10 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)