241018_42 ERW_Stormwater Report_compiled

PDA-1A (PERV) (new Subcat) PDA-1B (IMPERV) (new Subcat) PDA-1B(PERV) (new Subcat) PDA-1C(IMPERV) (new Subcat) PDA-1C(PERV) (new Subcat) PDA-2 (PERV.) (new Subcat) DP1-P (new Reach) DP2-P (new Reach) PDA-1B (new Reach) PDA-1C (new Reach) Basin 1 (new Pond) Basin 2 (new Pond) Routing Diagram for 240924_42 ERW Waymaker Prepared by Colliers Engineering & Design, Printed 10/17/2024 HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Subcat Reach Pond Link This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 2HydroCAD® 10.20-4b 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.

240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 3HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Rainfall Events Listing (selected events) 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 3 100-Year NOAA 24-hr D Default 24.00 1 8.66 2 4 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.

240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 4HydroCAD® 10.20-4b 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 (PDA-1A (PERV), PDA-1B(PERV), PDA-1C(PERV), PDA-2 (PERV.)) 0.644 89 Gravel roads, HSG C (PDA-1A (PERV), PDA-1B(PERV), PDA-1C(PERV), PDA-2 (PERV.)) 0.355 98 Paved parking, HSG C (PDA-1B (IMPERV)) 0.492 98 Roofs, HSG C (PDA-1B (IMPERV), PDA-1C(IMPERV)) 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.

240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 5HydroCAD® 10.20-4b 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 PDA-1A (PERV), PDA-1B (IMPERV), PDA-1B(PERV), PDA-1C(IMPERV), PDA-1C(PERV), PDA-2 (PERV.) 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.

240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 6HydroCAD® 10.20-4b 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 PDA-1A (PERV), PDA-1B(P ERV), PDA-1C( PERV), PDA-2 (PERV.) 0.000 0.000 0.644 0.000 0.000 0.644 Gravel roads PDA-1A (PERV), PDA-1B(P ERV), PDA-1C( PERV), PDA-2 (PERV.) 0.000 0.000 0.355 0.000 0.000 0.355 Paved parking PDA-1B (IMPERV) 0.000 0.000 0.492 0.000 0.000 0.492 Roofs PDA-1B (IMPERV) , PDA-1C(I MPERV) 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"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 7HydroCAD® 10.20-4b 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 PDA-1A (PERV): (new Subcat) Flow Length=203' Tc=5.9 min CN=78 Runoff=0.50 cfs 0.037 af Runoff Area=25,145 sf 100.00% Impervious Runoff Depth=3.21"Subcatchment PDA-1B (IMPERV): (new Flow Length=136' Tc=1.5 min CN=98 Runoff=2.07 cfs 0.154 af Runoff Area=58,772 sf 0.00% Impervious Runoff Depth=1.52"Subcatchment PDA-1B(PERV): (new Subcat) Flow Length=180' Tc=7.5 min CN=79 Runoff=2.24 cfs 0.171 af Runoff Area=11,760 sf 100.00% Impervious Runoff Depth=3.21"Subcatchment PDA-1C(IMPERV): (new Tc=1.0 min CN=98 Runoff=0.97 cfs 0.072 af Runoff Area=18,423 sf 0.00% Impervious Runoff Depth=1.45"Subcatchment PDA-1C(PERV): (new Subcat) Flow Length=123' Tc=7.2 min CN=78 Runoff=0.68 cfs 0.051 af Runoff Area=7,411 sf 0.00% Impervious Runoff Depth=1.32"Subcatchment PDA-2 (PERV.): (new Subcat) Flow Length=84' Slope=0.0833 '/' Tc=4.6 min CN=76 Runoff=0.26 cfs 0.019 af Inflow=1.41 cfs 0.389 afReach DP1-P: (new Reach) Outflow=1.41 cfs 0.389 af Inflow=0.26 cfs 0.019 afReach DP2-P: (new Reach) Outflow=0.26 cfs 0.019 af Inflow=3.81 cfs 0.325 afReach PDA-1B: (new Reach) Outflow=3.81 cfs 0.325 af Inflow=1.45 cfs 0.123 afReach PDA-1C: (new Reach) Outflow=1.45 cfs 0.123 af Peak Elev=14.76' Storage=0.164 af Inflow=3.81 cfs 0.325 afPond Basin 1: (new Pond) Outflow=0.57 cfs 0.258 af Peak Elev=16.61' Storage=0.054 af Inflow=1.45 cfs 0.123 afPond Basin 2: (new Pond) Outflow=0.67 cfs 0.095 af Total Runoff Area = 3.092 ac Runoff Volume = 0.504 af Average Runoff Depth = 1.96" 72.60% Pervious = 2.245 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"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 8HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment PDA-1A (PERV): (new Subcat) [49] Hint: Tc<2dt may require smaller dt Runoff = 0.50 cfs @ 12.13 hrs, Volume= 0.037 af, Depth= 1.45" Routed to Reach DP1-P : (new Reach) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NOAA 24-hr D 2-Year Rainfall=3.44" Area (sf) CN Description 9,975 74 >75% Grass cover, Good, HSG C 3,192 89 Gravel roads, HSG C 13,167 78 Weighted Average 13,167 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.6 100 0.0725 0.30 Sheet Flow, Grass: Short n= 0.150 P2= 3.44" 0.3 103 0.1090 5.32 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 5.9 203 Total Subcatchment PDA-1A (PERV): (new Subcat) 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"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 9HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment PDA-1B (IMPERV): (new Subcat) [49] Hint: Tc<2dt may require smaller dt Runoff = 2.07 cfs @ 12.07 hrs, Volume= 0.154 af, Depth= 3.21" Routed to Reach PDA-1B : (new Reach) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NOAA 24-hr D 2-Year Rainfall=3.44" Area (sf) CN Description 9,688 98 Roofs, HSG C 15,457 98 Paved parking, HSG C 25,145 98 Weighted Average 25,145 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.2 100 0.0200 1.43 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.44" 0.3 36 0.0139 2.39 Shallow Concentrated Flow, Paved Kv= 20.3 fps 1.5 136 Total Subcatchment PDA-1B (IMPERV): (new Subcat) Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 2 1 0 NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=25,145 sf Runoff Volume=0.154 af Runoff Depth=3.21" Flow Length=136' Tc=1.5 min CN=98 2.07 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"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 10HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment PDA-1B(PERV): (new Subcat) Runoff = 2.24 cfs @ 12.15 hrs, Volume= 0.171 af, Depth= 1.52" Routed to Reach PDA-1B : (new Reach) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NOAA 24-hr D 2-Year Rainfall=3.44" Area (sf) CN Description 39,275 74 >75% Grass cover, Good, HSG C 19,497 89 Gravel roads, HSG C 58,772 79 Weighted Average 58,772 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.2 100 0.0400 0.23 Sheet Flow, Grass: Short n= 0.150 P2= 3.44" 0.3 80 0.0812 4.59 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 7.5 180 Total Subcatchment PDA-1B(PERV): (new Subcat) Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 2 1 0 NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=58,772 sf Runoff Volume=0.171 af Runoff Depth=1.52" Flow Length=180' Tc=7.5 min CN=79 2.24 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.