Supporting Documentation · Jul 30, 2024
Revised Stormwater Management Report
69ec9df8b1f4567abd2a92749a074a179a57821dd07f0cd16dd61242156a3c29Indexed text
POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NJ DEP 2-hr WQ Rainfall=1.25" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 270 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 51S: Basin 10 - Imp Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 0.80 0.23 0.09 1.60 1.18 0.97 2.40 1.25 1.03 3.20 1.25 1.03 4.00 1.25 1.03 4.80 1.25 1.03 5.60 1.25 1.03 6.40 1.25 1.03 7.20 1.25 1.03 8.00 1.25 1.03 8.80 1.25 1.03 9.60 1.25 1.03 10.40 1.25 1.03 11.20 1.25 1.03 12.00 1.25 1.03 12.80 1.25 1.03 13.60 1.25 1.03 14.40 1.25 1.03 15.20 1.25 1.03 16.00 1.25 1.03 16.80 1.25 1.03 17.60 1.25 1.03 18.40 1.25 1.03 19.20 1.25 1.03 20.00 1.25 1.03 20.80 1.25 1.03 21.60 1.25 1.03 22.40 1.25 1.03 23.20 1.25 1.03 24.00 1.25 1.03 24.80 1.25 1.03 25.60 1.25 1.03 26.40 1.25 1.03 27.20 1.25 1.03 28.00 1.25 1.03 28.80 1.25 1.03 29.60 1.25 1.03 30.40 1.25 1.03 31.20 1.25 1.03 32.00 1.25 1.03 32.80 1.25 1.03 33.60 1.25 1.03 34.40 1.25 1.03 35.20 1.25 1.03 36.00 1.25 1.03 36.80 1.25 1.03 37.60 1.25 1.03 38.40 1.25 1.03 39.20 1.25 1.03 40.00 1.25 1.03 Runoff (cfs) 0.00 0.32 0.54 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Time Precip. Excess (hours) (inches)
00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Time Precip. Excess (hours) (inches) (inches) 40.80 1.25 1.03 41.60 1.25 1.03 42.40 1.25 1.03 43.20 1.25 1.03 44.00 1.25 1.03 44.80 1.25 1.03 45.60 1.25 1.03 46.40 1.25 1.03 47.20 1.25 1.03 48.00 1.25 1.03 48.80 1.25 1.03 49.60 1.25 1.03 50.40 1.25 1.03 51.20 1.25 1.03 52.00 1.25 1.03 52.80 1.25 1.03 53.60 1.25 1.03 54.40 1.25 1.03 55.20 1.25 1.03 56.00 1.25 1.03 56.80 1.25 1.03 57.60 1.25 1.03 58.40 1.25 1.03 59.20 1.25 1.03 60.00 1.25 1.03 60.80 1.25 1.03 61.60 1.25 1.03 62.40 1.25 1.03 63.20 1.25 1.03 64.00 1.25 1.03 64.80 1.25 1.03 65.60 1.25 1.03 66.40 1.25 1.03 67.20 1.25 1.03 68.00 1.25 1.03 68.80 1.25 1.03 69.60 1.25 1.03 70.40 1.25 1.03 71.20 1.25 1.03 72.00 1.25 1.03 72.80 1.25 1.03 73.60 1.25 1.03 74.40 1.25 1.03 75.20 1.25 1.03 76.00 1.25 1.03 76.80 1.25 1.03 77.60 1.25 1.03 78.40 1.25 1.03 79.20 1.25 1.03 80.00 1.25 1.03 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NJ DEP 2-hr WQ Rainfall=1.25" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 271 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 52S: Basin 10 - Perv Runoff = 0.14 cfs @ 1.26 hrs, Volume= Routed to Pond 41P : Basin 10 270 cf, Depth= 0.09" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-80.00 hrs, dt= 0.04 hrs NJ DEP 2-hr WQ Rainfall=1.25" Area (sf) 7,626 29,609 37,235 37,235 Tc (min) 9.0 CN 80 74 75 Description >75% Grass cover, Good, HSG D >75% Grass cover, Good, HSG C Weighted Average 100.00% Pervious Area Length (feet) 59 Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0200 0.11 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" Using McCuen-Spiess flow length 210 0.0480 3.53 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps 110 2.50 Direct Entry, Pipe Flow (C-D) 379 Total 1.0 0.7 10.7 Subcatchment 52S: Basin 10 - Perv Hydrograph 0.15 0.14 0.13 0.12 0.11 Flow (cfs) 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 Runoff 0.14 cfs NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=37,235 sf Runoff Volume=270 cf Runoff Depth=0.09" Flow Length=379' Tc=10.7 min CN=75 0.02 0.01 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 74 76 78 80 Time (hours)
POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NJ DEP 2-hr WQ Rainfall=1.25" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 272 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 52S: Basin 10 - Perv Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 0.80 0.23 0.00 1.60 1.18 0.07 2.40 1.25 0.09 3.20 1.25 0.09 4.00 1.25 0.09 4.80 1.25 0.09 5.60 1.25 0.09 6.40 1.25 0.09 7.20 1.25 0.09 8.00 1.25 0.09 8.80 1.25 0.09 9.60 1.25 0.09 10.40 1.25 0.09 11.20 1.25 0.09 12.00 1.25 0.09 12.80 1.25 0.09 13.60 1.25 0.09 14.40 1.25 0.09 15.20 1.25 0.09 16.00 1.25 0.09 16.80 1.25 0.09 17.60 1.25 0.09 18.40 1.25 0.09 19.20 1.25 0.09 20.00 1.25 0.09 20.80 1.25 0.09 21.60 1.25 0.09 22.40 1.25 0.09 23.20 1.25 0.09 24.00 1.25 0.09 24.80 1.25 0.09 25.60 1.25 0.09 26.40 1.25 0.09 27.20 1.25 0.09 28.00 1.25 0.09 28.80 1.25 0.09 29.60 1.25 0.09 30.40 1.25 0.09 31.20 1.25 0.09 32.00 1.25 0.09 32.80 1.25 0.09 33.60 1.25 0.09 34.40 1.25 0.09 35.20 1.25 0.09 36.00 1.25 0.09 36.80 1.25 0.09 37.60 1.25 0.09 38.40 1.25 0.09 39.20 1.25 0.09 40.00 1.25 0.09 Runoff (cfs) 0.00 0.00 0.08 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Time Precip. Excess (hours) (inches)
00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Time Precip. Excess (hours) (inches) (inches) 40.80 1.25 0.09 41.60 1.25 0.09 42.40 1.25 0.09 43.20 1.25 0.09 44.00 1.25 0.09 44.80 1.25 0.09 45.60 1.25 0.09 46.40 1.25 0.09 47.20 1.25 0.09 48.00 1.25 0.09 48.80 1.25 0.09 49.60 1.25 0.09 50.40 1.25 0.09 51.20 1.25 0.09 52.00 1.25 0.09 52.80 1.25 0.09 53.60 1.25 0.09 54.40 1.25 0.09 55.20 1.25 0.09 56.00 1.25 0.09 56.80 1.25 0.09 57.60 1.25 0.09 58.40 1.25 0.09 59.20 1.25 0.09 60.00 1.25 0.09 60.80 1.25 0.09 61.60 1.25 0.09 62.40 1.25 0.09 63.20 1.25 0.09 64.00 1.25 0.09 64.80 1.25 0.09 65.60 1.25 0.09 66.40 1.25 0.09 67.20 1.25 0.09 68.00 1.25 0.09 68.80 1.25 0.09 69.60 1.25 0.09 70.40 1.25 0.09 71.20 1.25 0.09 72.00 1.25 0.09 72.80 1.25 0.09 73.60 1.25 0.09 74.40 1.25 0.09 75.20 1.25 0.09 76.00 1.25 0.09 76.80 1.25 0.09 77.60 1.25 0.09 78.40 1.25 0.09 79.20 1.25 0.09 80.00 1.25 0.09 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NJ DEP 2-hr WQ Rainfall=1.25" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 273 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 53S: Basin 9 - Imp Runoff = 1.04 cfs @ 1.11 hrs, Volume= Routed to Pond 42P : Basin 9 1,391 cf, Depth= 1.03" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-80.00 hrs, dt= 0.04 hrs NJ DEP 2-hr WQ Rainfall=1.25" Area (sf) 6,889 9,244 16,133 16,133 Tc (min) 7.2 Length (feet) 100 0.2 40 7.4 140 CN 98 98 98 Description Paved parking, HSG D Paved parking, HSG C Weighted Average 100.00% Impervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.1000 0.23 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" 0.0750 4.41 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps Total Subcatchment 53S: Basin 9 - Imp Hydrograph Runoff 1.04 cfs Flow (cfs) 1 0 NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=16,133 sf Runoff Volume=1,391 cf Runoff Depth=1.03" Flow Length=140' Tc=7.4 min CN=98 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 74 76 78 80 Time (hours)
POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NJ DEP 2-hr WQ Rainfall=1.25" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 274 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 53S: Basin 9 - Imp Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 0.80 0.23 0.09 1.60 1.18 0.97 2.40 1.25 1.03 3.20 1.25 1.03 4.00 1.25 1.03 4.80 1.25 1.03 5.60 1.25 1.03 6.40 1.25 1.03 7.20 1.25 1.03 8.00 1.25 1.03 8.80 1.25 1.03 9.60 1.25 1.03 10.40 1.25 1.03 11.20 1.25 1.03 12.00 1.25 1.03 12.80 1.25 1.03 13.60 1.25 1.03 14.40 1.25 1.03 15.20 1.25 1.03 16.00 1.25 1.03 16.80 1.25 1.03 17.60 1.25 1.03 18.40 1.25 1.03 19.20 1.25 1.03 20.00 1.25 1.03 20.80 1.25 1.03 21.60 1.25 1.03 22.40 1.25 1.03 23.20 1.25 1.03 24.00 1.25 1.03 24.80 1.25 1.03 25.60 1.25 1.03 26.40 1.25 1.03 27.20 1.25 1.03 28.00 1.25 1.03 28.80 1.25 1.03 29.60 1.25 1.03 30.40 1.25 1.03 31.20 1.25 1.03 32.00 1.25 1.03 32.80 1.25 1.03 33.60 1.25 1.03 34.40 1.25 1.03 35.20 1.25 1.03 36.00 1.25 1.03 36.80 1.25 1.03 37.60 1.25 1.03 38.40 1.25 1.03 39.20 1.25 1.03 40.00 1.25 1.03 Runoff (cfs) 0.00 0.10 0.13 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Time Precip. Excess (hours) (inches)
00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Time Precip. Excess (hours) (inches) (inches) 40.80 1.25 1.03 41.60 1.25 1.03 42.40 1.25 1.03 43.20 1.25 1.03 44.00 1.25 1.03 44.80 1.25 1.03 45.60 1.25 1.03 46.40 1.25 1.03 47.20 1.25 1.03 48.00 1.25 1.03 48.80 1.25 1.03 49.60 1.25 1.03 50.40 1.25 1.03 51.20 1.25 1.03 52.00 1.25 1.03 52.80 1.25 1.03 53.60 1.25 1.03 54.40 1.25 1.03 55.20 1.25 1.03 56.00 1.25 1.03 56.80 1.25 1.03 57.60 1.25 1.03 58.40 1.25 1.03 59.20 1.25 1.03 60.00 1.25 1.03 60.80 1.25 1.03 61.60 1.25 1.03 62.40 1.25 1.03 63.20 1.25 1.03 64.00 1.25 1.03 64.80 1.25 1.03 65.60 1.25 1.03 66.40 1.25 1.03 67.20 1.25 1.03 68.00 1.25 1.03 68.80 1.25 1.03 69.60 1.25 1.03 70.40 1.25 1.03 71.20 1.25 1.03 72.00 1.25 1.03 72.80 1.25 1.03 73.60 1.25 1.03 74.40 1.25 1.03 75.20 1.25 1.03 76.00 1.25 1.03 76.80 1.25 1.03 77.60 1.25 1.03 78.40 1.25 1.03 79.20 1.25 1.03 80.00 1.25 1.03 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NJ DEP 2-hr WQ Rainfall=1.25" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 275 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 54S: Basin 9 - Perv Runoff = 0.07 cfs @ 1.18 hrs, Volume= Routed to Pond 42P : Basin 9 100 cf, Depth= 0.13" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-80.00 hrs, dt= 0.04 hrs NJ DEP 2-hr WQ Rainfall=1.25" Area (sf) 2,537 6,379 8,916 8,916 Tc (min) 7.2 Length (feet) 100 0.2 40 7.4 140 CN 74 80 78 Description >75% Grass cover, Good, HSG C >75% Grass cover, Good, HSG D Weighted Average 100.00% Pervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.1000 0.23 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" 0.0750 4.41 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps Total Subcatchment 54S: Basin 9 - Perv Hydrograph Runoff 0.07 0.07 cfs 0.065 0.06 0.055 0.05 Flow (cfs) 0.045 0.04 0.035 0.03 0.025 0.02 0.015 NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=8,916 sf Runoff Volume=100 cf Runoff Depth=0.13" Flow Length=140' Tc=7.4 min CN=78 0.01 0.005 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 74 76 78 80 Time (hours)
POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NJ DEP 2-hr WQ Rainfall=1.25" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 276 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 54S: Basin 9 - Perv Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 0.80 0.23 0.00 1.60 1.18 0.11 2.40 1.25 0.13 3.20 1.25 0.13 4.00 1.25 0.13 4.80 1.25 0.13 5.60 1.25 0.13 6.40 1.25 0.13 7.20 1.25 0.13 8.00 1.25 0.13 8.80 1.25 0.13 9.60 1.25 0.13 10.40 1.25 0.13 11.20 1.25 0.13 12.00 1.25 0.13 12.80 1.25 0.13 13.60 1.25 0.13 14.40 1.25 0.13 15.20 1.25 0.13 16.00 1.25 0.13 16.80 1.25 0.13 17.60 1.25 0.13 18.40 1.25 0.13 19.20 1.25 0.13 20.00 1.25 0.13 20.80 1.25 0.13 21.60 1.25 0.13 22.40 1.25 0.13 23.20 1.25 0.13 24.00 1.25 0.13 24.80 1.25 0.13 25.60 1.25 0.13 26.40 1.25 0.13 27.20 1.25 0.13 28.00 1.25 0.13 28.80 1.25 0.13 29.60 1.25 0.13 30.40 1.25 0.13 31.20 1.25 0.13 32.00 1.25 0.13 32.80 1.25 0.13 33.60 1.25 0.13 34.40 1.25 0.13 35.20 1.25 0.13 36.00 1.25 0.13 36.80 1.25 0.13 37.60 1.25 0.13 38.40 1.25 0.13 39.20 1.25 0.13 40.00 1.25 0.13 Runoff (cfs) 0.00 0.00 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Time Precip. Excess (hours) (inches)
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