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 263 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 36S: DA 2 Und - Perv Runoff = 0.72 cfs @ 1.21 hrs, Volume= Routed to Link 34L : DA 2 Undetained 1,220 cf, Depth= 0.12" 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) 57,417 67,725 125,142 125,142 Tc (min) 8.8 Length (feet) 100 0.3 60 9.1 160 CN 80 74 77 Description >75% Grass cover, Good, HSG D >75% Grass cover, Good, HSG C Weighted Average 100.00% Pervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0600 0.19 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" 0.0600 3.94 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps Total Subcatchment 36S: DA 2 Und - Perv Hydrograph 0.8 Runoff 0.75 0.72 cfs 0.7 0.65 0.6 0.55 Flow (cfs) 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=125,142 sf Runoff Volume=1,220 cf Runoff Depth=0.12" Flow Length=160' Slope=0.0600 '/' Tc=9.1 min CN=77 0.1 0.05 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 264 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 36S: DA 2 Und - Perv Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 0.80 0.23 0.00 1.60 1.18 0.10 2.40 1.25 0.12 3.20 1.25 0.12 4.00 1.25 0.12 4.80 1.25 0.12 5.60 1.25 0.12 6.40 1.25 0.12 7.20 1.25 0.12 8.00 1.25 0.12 8.80 1.25 0.12 9.60 1.25 0.12 10.40 1.25 0.12 11.20 1.25 0.12 12.00 1.25 0.12 12.80 1.25 0.12 13.60 1.25 0.12 14.40 1.25 0.12 15.20 1.25 0.12 16.00 1.25 0.12 16.80 1.25 0.12 17.60 1.25 0.12 18.40 1.25 0.12 19.20 1.25 0.12 20.00 1.25 0.12 20.80 1.25 0.12 21.60 1.25 0.12 22.40 1.25 0.12 23.20 1.25 0.12 24.00 1.25 0.12 24.80 1.25 0.12 25.60 1.25 0.12 26.40 1.25 0.12 27.20 1.25 0.12 28.00 1.25 0.12 28.80 1.25 0.12 29.60 1.25 0.12 30.40 1.25 0.12 31.20 1.25 0.12 32.00 1.25 0.12 32.80 1.25 0.12 33.60 1.25 0.12 34.40 1.25 0.12 35.20 1.25 0.12 36.00 1.25 0.12 36.80 1.25 0.12 37.60 1.25 0.12 38.40 1.25 0.12 39.20 1.25 0.12 40.00 1.25 0.12 Runoff (cfs) 0.00 0.00 0.30 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 0.12 41.60 1.25 0.12 42.40 1.25 0.12 43.20 1.25 0.12 44.00 1.25 0.12 44.80 1.25 0.12 45.60 1.25 0.12 46.40 1.25 0.12 47.20 1.25 0.12 48.00 1.25 0.12 48.80 1.25 0.12 49.60 1.25 0.12 50.40 1.25 0.12 51.20 1.25 0.12 52.00 1.25 0.12 52.80 1.25 0.12 53.60 1.25 0.12 54.40 1.25 0.12 55.20 1.25 0.12 56.00 1.25 0.12 56.80 1.25 0.12 57.60 1.25 0.12 58.40 1.25 0.12 59.20 1.25 0.12 60.00 1.25 0.12 60.80 1.25 0.12 61.60 1.25 0.12 62.40 1.25 0.12 63.20 1.25 0.12 64.00 1.25 0.12 64.80 1.25 0.12 65.60 1.25 0.12 66.40 1.25 0.12 67.20 1.25 0.12 68.00 1.25 0.12 68.80 1.25 0.12 69.60 1.25 0.12 70.40 1.25 0.12 71.20 1.25 0.12 72.00 1.25 0.12 72.80 1.25 0.12 73.60 1.25 0.12 74.40 1.25 0.12 75.20 1.25 0.12 76.00 1.25 0.12 76.80 1.25 0.12 77.60 1.25 0.12 78.40 1.25 0.12 79.20 1.25 0.12 80.00 1.25 0.12 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 265 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 45S: Basin 11 - Imp Runoff = 3.89 cfs @ 1.14 hrs, Volume= Routed to Pond 33P : Basin 11 5,624 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) 4,356 7,377 27,007 26,489 65,229 65,229 Tc (min) 8.9 Length (feet) 83 0.9 150 9.8 233 CN 98 98 98 98 98 Description Roofs, HSG D Paved parking, HSG D Roofs, HSG C Paved parking, HSG C Weighted Average 100.00% Impervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0400 0.15 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" Using McCuen-Spiess flow length 0.0330 2.92 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps Total Subcatchment 45S: Basin 11 - Imp Hydrograph Runoff 4 Flow (cfs) 3 2 3.89 cfs NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=65,229 sf Runoff Volume=5,624 cf Runoff Depth=1.03" Flow Length=233' Tc=9.8 min CN=98 1 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 266 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 45S: Basin 11 - 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 0.37 0.56 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 267 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 46S: Basin 11 - Perv Runoff = 0.07 cfs @ 1.25 hrs, Volume= Routed to Pond 33P : Basin 11 141 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) 2,920 16,544 19,464 19,464 Tc (min) 8.9 Length (feet) 83 0.9 150 9.8 233 CN 80 74 75 Description >75% Grass cover, Good, HSG D >75% Grass cover, Good, HSG C Weighted Average 100.00% Pervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0400 0.15 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" Using McCuen-Spiess flow length 0.0330 2.92 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps Total Subcatchment 46S: Basin 11 - Perv Hydrograph 0.08 0.075 0.07 0.065 0.06 0.055 Flow (cfs) 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 Runoff 0.07 cfs NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=19,464 sf Runoff Volume=141 cf Runoff Depth=0.09" Flow Length=233' Tc=9.8 min CN=75 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 268 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 46S: Basin 11 - 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 0.04 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 269 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 51S: Basin 10 - Imp Runoff = 3.47 cfs @ 1.15 hrs, Volume= Routed to Pond 41P : Basin 10 5,158 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) 19,602 35,284 4,937 59,823 59,823 Tc (min) 9.0 CN 98 98 98 98 Description Paved parking, HSG C Roofs, HSG C Paved parking, HSG D Weighted Average 100.00% Impervious 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 51S: Basin 10 - Imp Hydrograph Runoff 3.47 cfs Flow (cfs) 3 2 1 0 NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=59,823 sf Runoff Volume=5,158 cf Runoff Depth=1.03" Flow Length=379' Tc=10.7 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)
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