241220_42 ERW_Stormwater Report FULL

241220_42 ERW Waymaker Printed 12/20/2024Prepared by Colliers Engineering & Design Page 2HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Project Notes Rainfall events imported from "NRCS2-Rain.txt" for 1167 NJ Essex-D This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

241220_42 ERW Waymaker Printed 12/20/2024Prepared by Colliers Engineering & Design Page 3HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Rainfall Events Listing Event# Event Name Storm Type Curve Mode Duration (hours) B/B Depth (inches) AMC 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 25-Year NOAA 24-hr D Default 24.00 1 6.44 2 4 100-Year NOAA 24-hr D Default 24.00 1 8.66 2 5 WQ NJ DEP 2-hr Default 2.00 1 1.25 2 This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

241220_42 ERW Waymaker Printed 12/20/2024Prepared by Colliers Engineering & Design Page 4HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Area Listing (selected nodes) Area (acres) CN Description (subcatchment-numbers) 1.601 74 >75% Grass cover, Good, HSG C (PR 1A-P, PR 1B-P, PR 2-P) 0.643 89 Gravel roads, HSG C (PR 1A-P, PR 1B-P, PR 2-P) 0.355 98 Paved parking, HSG C (PR 1B-I) 0.492 98 Roofs, HSG C (PR 1B-I) 3.092 84 TOTAL AREA This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

241220_42 ERW Waymaker Printed 12/20/2024Prepared by Colliers Engineering & Design Page 5HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Soil Listing (selected nodes) Area (acres) Soil Group Subcatchment Numbers 0.000 HSG A 0.000 HSG B 3.092 HSG C PR 1A-P, PR 1B-I, PR 1B-P, PR 2-P 0.000 HSG D 0.000 Other 3.092 TOTAL AREA This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

241220_42 ERW Waymaker Printed 12/20/2024Prepared by Colliers Engineering & Design Page 6HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Ground Covers (selected nodes) HSG-A (acres) HSG-B (acres) HSG-C (acres) HSG-D (acres) Other (acres) Total (acres) Ground Cover Subcatchment Numbers 0.000 0.000 1.601 0.000 0.000 1.601 >75% Grass cover, Good PR 1A-P, PR 1B-P, PR 2-P 0.000 0.000 0.643 0.000 0.000 0.643 Gravel roads PR 1A-P, PR 1B-P, PR 2-P 0.000 0.000 0.355 0.000 0.000 0.355 Paved parking PR 1B-I 0.000 0.000 0.492 0.000 0.000 0.492 Roofs PR 1B-I 0.000 0.000 3.092 0.000 0.000 3.092 TOTAL AREA This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

NOAA 24-hr D 2-Year Rainfall=3.44"241220_42 ERW Waymaker Printed 12/20/2024Prepared by Colliers Engineering & Design Page 7HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Runoff Area=13,167 sf 0.00% Impervious Runoff Depth=1.45"Subcatchment PR 1A-P: Flow Length=203' Tc=5.9 min CN=78 Runoff=0.50 cfs 0.037 af Runoff Area=36,906 sf 100.00% Impervious Runoff Depth=3.21"Subcatchment PR 1B-I: Flow Length=136' Tc=1.5 min CN=98 Runoff=3.04 cfs 0.226 af Runoff Area=77,195 sf 0.00% Impervious Runoff Depth=1.52"Subcatchment PR 1B-P: Flow Length=180' Tc=7.5 min CN=79 Runoff=2.95 cfs 0.224 af Runoff Area=7,405 sf 0.00% Impervious Runoff Depth=1.32"Subcatchment PR 2-P: Flow Length=84' Slope=0.0833 '/' Tc=4.6 min CN=76 Runoff=0.26 cfs 0.019 af Inflow=5.32 cfs 0.451 afReach 10R: Outflow=5.32 cfs 0.451 af Inflow=1.40 cfs 0.256 afReach DP1-PR: Outflow=1.40 cfs 0.256 af Inflow=0.26 cfs 0.019 afReach DP2-PR: Outflow=0.26 cfs 0.019 af Peak Elev=14.76' Storage=0.167 af Inflow=5.32 cfs 0.451 afPond BASIN: Discarded=0.13 cfs 0.232 af Primary=1.20 cfs 0.219 af Outflow=1.33 cfs 0.451 af Total Runoff Area = 3.092 ac Runoff Volume = 0.506 af Average Runoff Depth = 1.96" 72.60% Pervious = 2.244 ac 27.40% Impervious = 0.847 ac This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

NOAA 24-hr D 2-Year Rainfall=3.44"241220_42 ERW Waymaker Printed 12/20/2024Prepared by Colliers Engineering & Design Page 8HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Subcatchment PR 1A-P: Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 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 NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=13,167 sf Runoff Volume=0.037 af Runoff Depth=1.45" Flow Length=203' Tc=5.9 min CN=78 0.50 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

NOAA 24-hr D 2-Year Rainfall=3.44"241220_42 ERW Waymaker Printed 12/20/2024Prepared by Colliers Engineering & Design Page 9HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Subcatchment PR 1B-I: Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 3 2 1 0 NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=36,906 sf Runoff Volume=0.226 af Runoff Depth=3.21" Flow Length=136' Tc=1.5 min CN=98 3.04 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

NOAA 24-hr D 2-Year Rainfall=3.44"241220_42 ERW Waymaker Printed 12/20/2024Prepared by Colliers Engineering & Design Page 10HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Subcatchment PR 1B-P: Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 3 2 1 0 NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=77,195 sf Runoff Volume=0.224 af Runoff Depth=1.52" Flow Length=180' Tc=7.5 min CN=79 2.95 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

NOAA 24-hr D 2-Year Rainfall=3.44"241220_42 ERW Waymaker Printed 12/20/2024Prepared by Colliers Engineering & Design Page 11HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Subcatchment PR 2-P: Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=7,405 sf Runoff Volume=0.019 af Runoff Depth=1.32" Flow Length=84' Slope=0.0833 '/' Tc=4.6 min CN=76 0.26 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.