241018_42 ERW_Stormwater Report_compiled

NOAA 24-hr D 100-Year Rainfall=8.66"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 51HydroCAD® 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 = 6.95" for 100-Year event Inflow = 4.58 cfs @ 12.09 hrs, Volume= 0.401 af Outflow = 4.58 cfs @ 12.09 hrs, Volume= 0.401 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) 5 4 3 2 1 0 Inflow Area=0.693 ac 4.58 cfs 4.58 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 100-Year Rainfall=8.66"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 52HydroCAD® 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 = 6.81" for 100-Year event Inflow = 12.54 cfs @ 12.10 hrs, Volume= 1.094 af Outflow = 5.92 cfs @ 12.27 hrs, Volume= 1.026 af, Atten= 53%, Lag= 10.3 min Primary = 5.92 cfs @ 12.27 hrs, Volume= 1.026 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= 18.25' @ 12.27 hrs Surf.Area= 0.121 ac Storage= 0.412 af Plug-Flow detention time= 156.3 min calculated for 1.025 af (94% of inflow) Center-of-Mass det. time= 122.6 min ( 905.8 - 783.2 ) 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=5.78 cfs @ 12.27 hrs HW=18.23' (Free Discharge) 1=Orifice/Grate (Orifice Controls 1.35 cfs @ 9.89 fps) 2=Orifice/Grate (Orifice Controls 1.69 cfs @ 8.58 fps) 3=Sharp-Crested Rectangular Weir (Weir Controls 2.75 cfs @ 2.79 fps) 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 100-Year Rainfall=8.66"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 53HydroCAD® 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.

NOAA 24-hr D 100-Year Rainfall=8.66"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 54HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Pond Basin 1: (new Pond) Inflow Primary Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=1.926 ac Peak Elev=18.25' Storage=0.412 af 12.54 cfs 5.92 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 100-Year Rainfall=8.66"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 55HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Summary for Pond Basin 2: (new Pond) Inflow Area = 0.693 ac, 38.96% Impervious, Inflow Depth = 6.95" for 100-Year event Inflow = 4.58 cfs @ 12.09 hrs, Volume= 0.401 af Outflow = 4.52 cfs @ 12.10 hrs, Volume= 0.373 af, Atten= 1%, Lag= 1.0 min Primary = 4.52 cfs @ 12.10 hrs, Volume= 0.373 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= 17.46' @ 12.10 hrs Surf.Area= 0.031 ac Storage= 0.065 af Plug-Flow detention time= 114.8 min calculated for 0.372 af (93% of inflow) Center-of-Mass det. time= 75.7 min ( 852.3 - 776.6 ) Volume Invert Avail.Storage Storage Description #1A 14.00' 0.029 af 34.75'W x 39.22'L x 3.50'H Field A 0.109 af Overall - 0.037 af Embedded = 0.073 af x 40.0% Voids #2A 14.50' 0.037 af ADS_StormTech SC-740 +Cap x 35 Inside #1 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap 35 Chambers in 7 Rows 0.066 af Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 15.40' 2.5" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #2 Primary 16.30' 6.0" Vert. Orifice/Grate X 2.00 C= 0.600 Limited to weir flow at low heads #3 Primary 17.05' 3.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) Primary OutFlow Max=4.48 cfs @ 12.10 hrs HW=17.45' (Free Discharge) 1=Orifice/Grate (Orifice Controls 0.23 cfs @ 6.72 fps) 2=Orifice/Grate (Orifice Controls 1.80 cfs @ 4.58 fps) 3=Sharp-Crested Rectangular Weir (Weir Controls 2.45 cfs @ 2.08 fps) 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 100-Year Rainfall=8.66"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 56HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Pond Basin 2: (new Pond) - Chamber Wizard Field A Chamber Model = ADS_StormTech SC-740 +Cap (ADS StormTech® SC-740 with cap length) Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap 51.0" Wide + 6.0" Spacing = 57.0" C-C Row Spacing 5 Chambers/Row x 7.12' Long +0.81' Cap Length x 2 = 37.22' Row Length +12.0" End Stone x 2 = 39.22' Base Length 7 Rows x 51.0" Wide + 6.0" Spacing x 6 + 12.0" Side Stone x 2 = 34.75' Base Width 6.0" Stone Base + 30.0" Chamber Height + 6.0" Stone Cover = 3.50' Field Height 35 Chambers x 45.9 cf = 1,607.9 cf Chamber Storage 4,769.7 cf Field - 1,607.9 cf Chambers = 3,161.8 cf Stone x 40.0% Voids = 1,264.7 cf Stone Storage Chamber Storage + Stone Storage = 2,872.6 cf = 0.066 af Overall Storage Efficiency = 60.2% Overall System Size = 39.22' x 34.75' x 3.50' 35 Chambers 176.7 cy Field 117.1 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.

NOAA 24-hr D 100-Year Rainfall=8.66"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 57HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Pond Basin 2: (new Pond) Inflow Primary Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 5 4 3 2 1 0 Inflow Area=0.693 ac Peak Elev=17.46' Storage=0.065 af 4.58 cfs 4.52 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 58HydroCAD® 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=0.13"Subcatchment PDA-1A (PERV): (new Subcat) Flow Length=203' Tc=5.9 min CN=78 Runoff=0.11 cfs 0.003 af Runoff Area=25,145 sf 100.00% Impervious Runoff Depth=1.03"Subcatchment PDA-1B (IMPERV): (new Flow Length=136' Tc=1.5 min CN=98 Runoff=1.79 cfs 0.050 af Runoff Area=58,772 sf 0.00% Impervious Runoff Depth=0.15"Subcatchment PDA-1B(PERV): (new Subcat) Flow Length=180' Tc=7.5 min CN=79 Runoff=0.51 cfs 0.017 af Runoff Area=11,760 sf 100.00% Impervious Runoff Depth=1.03"Subcatchment PDA-1C(IMPERV): (new Tc=1.0 min CN=98 Runoff=0.85 cfs 0.023 af Runoff Area=18,423 sf 0.00% Impervious Runoff Depth=0.13"Subcatchment PDA-1C(PERV): (new Subcat) Flow Length=123' Tc=7.2 min CN=78 Runoff=0.14 cfs 0.005 af Runoff Area=7,411 sf 0.00% Impervious Runoff Depth=0.10"Subcatchment PDA-2 (PERV.): (new Subcat) Flow Length=84' Slope=0.0833 '/' Tc=4.6 min CN=76 Runoff=0.04 cfs 0.001 af Inflow=0.11 cfs 0.003 afReach DP1-P: (new Reach) Outflow=0.11 cfs 0.003 af Inflow=0.04 cfs 0.001 afReach DP2-P: (new Reach) Outflow=0.04 cfs 0.001 af Inflow=1.82 cfs 0.067 afReach PDA-1B: (new Reach) Outflow=1.82 cfs 0.067 af Inflow=0.85 cfs 0.028 afReach PDA-1C: (new Reach) Outflow=0.85 cfs 0.028 af Peak Elev=13.80' Storage=0.067 af Inflow=1.82 cfs 0.067 afPond Basin 1: (new Pond) Outflow=0.00 cfs 0.000 af Peak Elev=15.38' Storage=0.028 af Inflow=0.85 cfs 0.028 afPond Basin 2: (new Pond) Outflow=0.00 cfs 0.000 af Total Runoff Area = 3.092 ac Runoff Volume = 0.100 af Average Runoff Depth = 0.39" 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.

NJ DEP 2-hr WQ Rainfall=1.25"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 59HydroCAD® 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 = 0.11 cfs @ 1.16 hrs, Volume= 0.003 af, Depth= 0.13" 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 NJ DEP 2-hr WQ Rainfall=1.25" 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) 0.115 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 NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=13,167 sf Runoff Volume=0.003 af Runoff Depth=0.13" Flow Length=203' Tc=5.9 min CN=78 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 60HydroCAD® 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 = 1.79 cfs @ 1.03 hrs, Volume= 0.050 af, Depth= 1.03" 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 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 NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=25,145 sf Runoff Volume=0.050 af Runoff Depth=1.03" Flow Length=136' Tc=1.5 min CN=98 1.79 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.