241018_42 ERW_Stormwater Report_compiled

NJ DEP 2-hr WQ Rainfall=1.25"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 61HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment PDA-1B(PERV): (new Subcat) Runoff = 0.51 cfs @ 1.17 hrs, Volume= 0.017 af, Depth= 0.15" 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 NJ DEP 2-hr WQ Rainfall=1.25" 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) 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=58,772 sf Runoff Volume=0.017 af Runoff Depth=0.15" Flow Length=180' Tc=7.5 min CN=79 0.51 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.

NJ DEP 2-hr WQ Rainfall=1.25"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 62HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment PDA-1C(IMPERV): (new Subcat) [49] Hint: Tc<2dt may require smaller dt Runoff = 0.85 cfs @ 1.03 hrs, Volume= 0.023 af, Depth= 1.03" Routed to Reach PDA-1C : (new Reach) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NJ DEP 2-hr WQ Rainfall=1.25" Area (sf) CN Description 11,760 98 Roofs, HSG C 11,760 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.0 Direct Entry, Subcatchment PDA-1C(IMPERV): (new Subcat) Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 0.95 0.9 0.85 0.8 0.75 0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=11,760 sf Runoff Volume=0.023 af Runoff Depth=1.03" Tc=1.0 min CN=98 0.85 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.

NJ DEP 2-hr WQ Rainfall=1.25"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 63HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment PDA-1C(PERV): (new Subcat) Runoff = 0.14 cfs @ 1.17 hrs, Volume= 0.005 af, Depth= 0.13" Routed to Reach PDA-1C : (new Reach) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NJ DEP 2-hr WQ Rainfall=1.25" Area (sf) CN Description 4,377 89 Gravel roads, HSG C 14,046 74 >75% Grass cover, Good, HSG C 18,423 78 Weighted Average 18,423 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.0 100 0.0425 0.24 Sheet Flow, Grass: Short n= 0.150 P2= 3.44" 0.2 23 0.0100 1.61 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 7.2 123 Total Subcatchment PDA-1C(PERV): (new Subcat) Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=18,423 sf Runoff Volume=0.005 af Runoff Depth=0.13" Flow Length=123' Tc=7.2 min CN=78 0.14 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.

NJ DEP 2-hr WQ Rainfall=1.25"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 64HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment PDA-2 (PERV.): (new Subcat) [49] Hint: Tc<2dt may require smaller dt Runoff = 0.04 cfs @ 1.16 hrs, Volume= 0.001 af, Depth= 0.10" Routed to Reach DP2-P : (new Reach) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NJ DEP 2-hr WQ Rainfall=1.25" Area (sf) CN Description 6,431 74 >75% Grass cover, Good, HSG C 980 89 Gravel roads, HSG C 7,411 76 Weighted Average 7,411 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 4.6 84 0.0833 0.30 Sheet Flow, Grass: Short n= 0.150 P2= 3.44" Subcatchment PDA-2 (PERV.): (new Subcat) Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 0.046 0.044 0.042 0.04 0.038 0.036 0.034 0.032 0.03 0.028 0.026 0.024 0.022 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=7,411 sf Runoff Volume=0.001 af Runoff Depth=0.10" Flow Length=84' Slope=0.0833 '/' Tc=4.6 min CN=76 0.04 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.

NJ DEP 2-hr WQ Rainfall=1.25"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 65HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Summary for Reach DP1-P: (new Reach) [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 2.922 ac, 29.00% Impervious, Inflow Depth = 0.01" for WQ event Inflow = 0.11 cfs @ 1.16 hrs, Volume= 0.003 af Outflow = 0.11 cfs @ 1.16 hrs, Volume= 0.003 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach DP1-P: (new Reach) Inflow Outflow Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 0.115 0.11 0.105 0.1 0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Inflow Area=2.922 ac 0.11 cfs 0.11 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.

NJ DEP 2-hr WQ Rainfall=1.25"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 66HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Summary for Reach DP2-P: (new Reach) [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 0.170 ac, 0.00% Impervious, Inflow Depth = 0.10" for WQ event Inflow = 0.04 cfs @ 1.16 hrs, Volume= 0.001 af Outflow = 0.04 cfs @ 1.16 hrs, Volume= 0.001 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach DP2-P: (new Reach) Inflow Outflow Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 0.046 0.044 0.042 0.04 0.038 0.036 0.034 0.032 0.03 0.028 0.026 0.024 0.022 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 Inflow Area=0.170 ac 0.04 cfs 0.04 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.

NJ DEP 2-hr WQ Rainfall=1.25"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 67HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Summary for Reach PDA-1B: (new Reach) [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 1.926 ac, 29.96% Impervious, Inflow Depth = 0.42" for WQ event Inflow = 1.82 cfs @ 1.04 hrs, Volume= 0.067 af Outflow = 1.82 cfs @ 1.04 hrs, Volume= 0.067 af, Atten= 0%, Lag= 0.0 min Routed to Pond Basin 1 : (new Pond) Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach PDA-1B: (new Reach) Inflow Outflow Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 2 1 0 Inflow Area=1.926 ac 1.82 cfs 1.82 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.

NJ DEP 2-hr WQ Rainfall=1.25"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 68HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Summary for Reach PDA-1C: (new Reach) [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 0.693 ac, 38.96% Impervious, Inflow Depth = 0.48" for WQ event Inflow = 0.85 cfs @ 1.03 hrs, Volume= 0.028 af Outflow = 0.85 cfs @ 1.03 hrs, Volume= 0.028 af, Atten= 0%, Lag= 0.0 min Routed to Pond Basin 2 : (new Pond) Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach PDA-1C: (new Reach) Inflow Outflow Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 0.95 0.9 0.85 0.8 0.75 0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=0.693 ac 0.85 cfs 0.85 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.

NJ DEP 2-hr WQ Rainfall=1.25"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 69HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Summary for Pond Basin 1: (new Pond) Inflow Area = 1.926 ac, 29.96% Impervious, Inflow Depth = 0.42" for WQ event Inflow = 1.82 cfs @ 1.04 hrs, Volume= 0.067 af Outflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 100%, Lag= 0.0 min Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Reach DP1-P : (new Reach) Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 13.80' @ 2.45 hrs Surf.Area= 0.121 ac Storage= 0.067 af Plug-Flow detention time= (not calculated: initial storage exceeds outflow) Center-of-Mass det. time= (not calculated: no outflow) Volume Invert Avail.Storage Storage Description #1A 12.75' 0.169 af 37.08'W x 141.93'L x 5.50'H Field A 0.665 af Overall - 0.243 af Embedded = 0.421 af x 40.0% Voids #2A 13.50' 0.243 af ADS_StormTech MC-3500 d +Cap x 95 Inside #1 Effective Size= 70.4"W x 45.0"H => 15.33 sf x 7.17'L = 110.0 cf Overall Size= 77.0"W x 45.0"H x 7.50'L with 0.33' Overlap 95 Chambers in 5 Rows Cap Storage= 14.9 cf x 2 x 5 rows = 149.0 cf 0.412 af Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 13.80' 5.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #2 Primary 14.80' 6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Primary 17.50' 1.5' long Sharp-Crested Rectangular Weir 2 End Contraction(s) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=12.75' (Free Discharge) 1=Orifice/Grate ( Controls 0.00 cfs) 2=Orifice/Grate ( Controls 0.00 cfs) 3=Sharp-Crested Rectangular Weir ( Controls 0.00 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.

NJ DEP 2-hr WQ Rainfall=1.25"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 70HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Pond Basin 1: (new Pond) - Chamber Wizard Field A Chamber Model = ADS_StormTech MC-3500 d +Cap (ADS StormTech® MC-3500 d rev 03/14 with Cap volume) Effective Size= 70.4"W x 45.0"H => 15.33 sf x 7.17'L = 110.0 cf Overall Size= 77.0"W x 45.0"H x 7.50'L with 0.33' Overlap Cap Storage= 14.9 cf x 2 x 5 rows = 149.0 cf 77.0" Wide + 9.0" Spacing = 86.0" C-C Row Spacing 19 Chambers/Row x 7.17' Long +1.85' Cap Length x 2 = 139.93' Row Length +12.0" End Stone x 2 = 141.93' Base Length 5 Rows x 77.0" Wide + 9.0" Spacing x 4 + 12.0" Side Stone x 2 = 37.08' Base Width 9.0" Stone Base + 45.0" Chamber Height + 12.0" Stone Cover = 5.50' Field Height 95 Chambers x 110.0 cf + 14.9 cf Cap Volume x 2 x 5 Rows = 10,594.4 cf Chamber Storage 28,947.8 cf Field - 10,594.4 cf Chambers = 18,353.4 cf Stone x 40.0% Voids = 7,341.3 cf Stone Storage Chamber Storage + Stone Storage = 17,935.8 cf = 0.412 af Overall Storage Efficiency = 62.0% Overall System Size = 141.93' x 37.08' x 5.50' 95 Chambers 1,072.1 cy Field 679.8 cy Stone This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.