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HomeMy WebLinkAboutHydroCAD Report (6.6.23)1Ex Pre-Development Watershed - 1 2Ex Pre-Development Watershed - 2 3Ex Pre-Development Watershed - 3 4Ex Pre-Development Watershed - 4 5Ex Pre-Development Watershed - 5 6Ex Pre-Development Watershed - 6 EX Total Site Runoff - Pre-Development Routing Diagram for 8807.Existing(5.1.23) Prepared by J M O'Reilly & Associates Inc, Printed 6/5/2023 HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Subcat Reach Pond Link 8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 2HydroCAD® 10.20-2g s/n 08678 © 2022 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 Type III 24-hr Default 24.00 1 3.36 2 2 10-year Type III 24-hr Default 24.00 1 4.88 2 3 25-year Type III 24-hr Default 24.00 1 5.84 2 4 100-year Type III 24-hr Default 24.00 1 7.31 2 Type III 24-hr 2-year Rainfall=3.36"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 3HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Time span=0.00-28.00 hrs, dt=0.03 hrs, 934 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=100,376 sf 0.00% Impervious Runoff Depth=0.00"Subcatchment 1Ex: Pre-Development Flow Length=560' Tc=15.2 min CN=38 Runoff=0.00 cfs 0.000 af Runoff Area=30,064 sf 0.00% Impervious Runoff Depth=0.00"Subcatchment 2Ex: Pre-Development Flow Length=230' Slope=0.0600 '/' Tc=10.2 min CN=37 Runoff=0.00 cfs 0.000 af Runoff Area=230,874 sf 0.00% Impervious Runoff Depth=0.00"Subcatchment 3Ex: Pre-Development Flow Length=700' Tc=17.3 min CN=38 Runoff=0.00 cfs 0.000 af Runoff Area=115,350 sf 0.00% Impervious Runoff Depth=0.00"Subcatchment 4Ex: Pre-Development Flow Length=330' Tc=12.8 min CN=38 Runoff=0.00 cfs 0.000 af Runoff Area=19,999 sf 0.00% Impervious Runoff Depth=0.00"Subcatchment 5Ex: Pre-Development Flow Length=210' Tc=11.8 min CN=37 Runoff=0.00 cfs 0.000 af Runoff Area=24,480 sf 0.00% Impervious Runoff Depth=0.00"Subcatchment 6Ex: Pre-Development Flow Length=250' Tc=18.5 min CN=37 Runoff=0.00 cfs 0.000 af Inflow=0.00 cfs 0.000 afLink EX: Total Site Runoff - Pre-Development Primary=0.00 cfs 0.000 af Total Runoff Area = 11.964 ac Runoff Volume = 0.000 af Average Runoff Depth = 0.00" 100.00% Pervious = 11.964 ac 0.00% Impervious = 0.000 ac Type III 24-hr 2-year Rainfall=3.36"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 4HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1Ex: Pre-Development Watershed - 1 Runoff = 0.00 cfs @ 24.02 hrs, Volume= 0.000 af, Depth= 0.00" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 2-year Rainfall=3.36" Area (sf) CN Description 74,376 36 Woods, Fair, HSG A 26,000 43 Woods/grass comb., Fair, HSG A 100,376 38 Weighted Average 100,376 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.8 50 0.0600 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 7.4 510 0.0530 1.15 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 15.2 560 Total Subcatchment 1Ex: Pre-Development Watershed - 1 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.001 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 0 0 Type III 24-hr 2-year Rainfall=3.36" Runoff Area=100,376 sf Runoff Volume=0.000 af Runoff Depth=0.00" Flow Length=560' Tc=15.2 min CN=38 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 5HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2Ex: Pre-Development Watershed - 2 Runoff = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Depth= 0.00" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 2-year Rainfall=3.36" Area (sf) CN Description 25,064 36 Woods, Fair, HSG A 5,000 43 Woods/grass comb., Fair, HSG A 30,064 37 Weighted Average 30,064 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.8 50 0.0600 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 2.4 180 0.0600 1.22 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 10.2 230 Total Subcatchment 2Ex: Pre-Development Watershed - 2 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Type III 24-hr 2-year Rainfall=3.36" Runoff Area=30,064 sf Runoff Volume=0.000 af Runoff Depth=0.00" Flow Length=230' Slope=0.0600 '/' Tc=10.2 min CN=37 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 6HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 3Ex: Pre-Development Watershed - 3 Runoff = 0.00 cfs @ 24.04 hrs, Volume= 0.000 af, Depth= 0.00" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 2-year Rainfall=3.36" Area (sf) CN Description 175,874 36 Woods, Fair, HSG A 55,000 43 Woods/grass comb., Fair, HSG A 230,874 38 Weighted Average 230,874 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.8 50 0.0600 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 9.5 650 0.0520 1.14 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 17.3 700 Total Subcatchment 3Ex: Pre-Development Watershed - 3 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0.000 0.000 0 0 Type III 24-hr 2-year Rainfall=3.36" Runoff Area=230,874 sf Runoff Volume=0.000 af Runoff Depth=0.00" Flow Length=700' Tc=17.3 min CN=38 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 7HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 4Ex: Pre-Development Watershed - 4 Runoff = 0.00 cfs @ 24.02 hrs, Volume= 0.000 af, Depth= 0.00" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 2-year Rainfall=3.36" Area (sf) CN Description 90,350 36 Woods, Fair, HSG A 25,000 43 Woods/grass comb., Fair, HSG A 115,350 38 Weighted Average 115,350 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.1 50 0.0400 0.09 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 3.7 280 0.0640 1.26 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 12.8 330 Total Subcatchment 4Ex: Pre-Development Watershed - 4 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 0 0 Type III 24-hr 2-year Rainfall=3.36" Runoff Area=115,350 sf Runoff Volume=0.000 af Runoff Depth=0.00" Flow Length=330' Tc=12.8 min CN=38 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 8HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 5Ex: Pre-Development Watershed - 5 Runoff = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Depth= 0.00" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 2-year Rainfall=3.36" Area (sf) CN Description 15,999 36 Woods, Fair, HSG A 4,000 43 Woods/grass comb., Fair, HSG A 19,999 37 Weighted Average 19,999 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.1 50 0.0400 0.09 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 2.7 160 0.0380 0.97 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 11.8 210 Total Subcatchment 5Ex: Pre-Development Watershed - 5 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Type III 24-hr 2-year Rainfall=3.36" Runoff Area=19,999 sf Runoff Volume=0.000 af Runoff Depth=0.00" Flow Length=210' Tc=11.8 min CN=37 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 9HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 6Ex: Pre-Development Watershed - 6 Runoff = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Depth= 0.00" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 2-year Rainfall=3.36" Area (sf) CN Description 19,480 36 Woods, Fair, HSG A 5,000 43 Woods/grass comb., Fair, HSG A 24,480 37 Weighted Average 24,480 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.9 50 0.0100 0.05 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 2.6 200 0.0650 1.27 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 18.5 250 Total Subcatchment 6Ex: Pre-Development Watershed - 6 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Type III 24-hr 2-year Rainfall=3.36" Runoff Area=24,480 sf Runoff Volume=0.000 af Runoff Depth=0.00" Flow Length=250' Tc=18.5 min CN=37 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 10HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Link EX: Total Site Runoff - Pre-Development Inflow Area = 11.964 ac, 0.00% Impervious, Inflow Depth = 0.00" for 2-year event Inflow = 0.00 cfs @ 24.03 hrs, Volume= 0.000 af Primary = 0.00 cfs @ 24.03 hrs, Volume= 0.000 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Link EX: Total Site Runoff - Pre-Development Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.004 0.003 0.003 0.003 0.003 0.003 0.002 0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0 Inflow Area=11.964 ac 0.00 cfs 0.00 cfs Type III 24-hr 10-year Rainfall=4.88"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 11HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Time span=0.00-28.00 hrs, dt=0.03 hrs, 934 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=100,376 sf 0.00% Impervious Runoff Depth=0.15"Subcatchment 1Ex: Pre-Development Flow Length=560' Tc=15.2 min CN=38 Runoff=0.05 cfs 0.028 af Runoff Area=30,064 sf 0.00% Impervious Runoff Depth=0.12"Subcatchment 2Ex: Pre-Development Flow Length=230' Slope=0.0600 '/' Tc=10.2 min CN=37 Runoff=0.01 cfs 0.007 af Runoff Area=230,874 sf 0.00% Impervious Runoff Depth=0.15"Subcatchment 3Ex: Pre-Development Flow Length=700' Tc=17.3 min CN=38 Runoff=0.10 cfs 0.064 af Runoff Area=115,350 sf 0.00% Impervious Runoff Depth=0.15"Subcatchment 4Ex: Pre-Development Flow Length=330' Tc=12.8 min CN=38 Runoff=0.05 cfs 0.032 af Runoff Area=19,999 sf 0.00% Impervious Runoff Depth=0.12"Subcatchment 5Ex: Pre-Development Flow Length=210' Tc=11.8 min CN=37 Runoff=0.01 cfs 0.004 af Runoff Area=24,480 sf 0.00% Impervious Runoff Depth=0.12"Subcatchment 6Ex: Pre-Development Flow Length=250' Tc=18.5 min CN=37 Runoff=0.01 cfs 0.006 af Inflow=0.23 cfs 0.141 afLink EX: Total Site Runoff - Pre-Development Primary=0.23 cfs 0.141 af Total Runoff Area = 11.964 ac Runoff Volume = 0.141 af Average Runoff Depth = 0.14" 100.00% Pervious = 11.964 ac 0.00% Impervious = 0.000 ac Type III 24-hr 10-year Rainfall=4.88"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 12HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1Ex: Pre-Development Watershed - 1 Runoff = 0.05 cfs @ 13.92 hrs, Volume= 0.028 af, Depth= 0.15" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 10-year Rainfall=4.88" Area (sf) CN Description 74,376 36 Woods, Fair, HSG A 26,000 43 Woods/grass comb., Fair, HSG A 100,376 38 Weighted Average 100,376 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.8 50 0.0600 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 7.4 510 0.0530 1.15 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 15.2 560 Total Subcatchment 1Ex: Pre-Development Watershed - 1 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.05 0.048 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 Type III 24-hr 10-year Rainfall=4.88" Runoff Area=100,376 sf Runoff Volume=0.028 af Runoff Depth=0.15" Flow Length=560' Tc=15.2 min CN=38 0.05 cfs Type III 24-hr 10-year Rainfall=4.88"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 13HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2Ex: Pre-Development Watershed - 2 Runoff = 0.01 cfs @ 14.82 hrs, Volume= 0.007 af, Depth= 0.12" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 10-year Rainfall=4.88" Area (sf) CN Description 25,064 36 Woods, Fair, HSG A 5,000 43 Woods/grass comb., Fair, HSG A 30,064 37 Weighted Average 30,064 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.8 50 0.0600 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 2.4 180 0.0600 1.22 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 10.2 230 Total Subcatchment 2Ex: Pre-Development Watershed - 2 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.012 0.011 0.011 0.01 0.01 0.009 0.009 0.008 0.008 0.007 0.007 0.006 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Type III 24-hr 10-year Rainfall=4.88" Runoff Area=30,064 sf Runoff Volume=0.007 af Runoff Depth=0.12" Flow Length=230' Slope=0.0600 '/' Tc=10.2 min CN=37 0.01 cfs Type III 24-hr 10-year Rainfall=4.88"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 14HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 3Ex: Pre-Development Watershed - 3 Runoff = 0.10 cfs @ 13.97 hrs, Volume= 0.064 af, Depth= 0.15" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 10-year Rainfall=4.88" Area (sf) CN Description 175,874 36 Woods, Fair, HSG A 55,000 43 Woods/grass comb., Fair, HSG A 230,874 38 Weighted Average 230,874 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.8 50 0.0600 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 9.5 650 0.0520 1.14 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 17.3 700 Total Subcatchment 3Ex: Pre-Development Watershed - 3 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (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 Type III 24-hr 10-year Rainfall=4.88" Runoff Area=230,874 sf Runoff Volume=0.064 af Runoff Depth=0.15" Flow Length=700' Tc=17.3 min CN=38 0.10 cfs Type III 24-hr 10-year Rainfall=4.88"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 15HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 4Ex: Pre-Development Watershed - 4 Runoff = 0.05 cfs @ 13.89 hrs, Volume= 0.032 af, Depth= 0.15" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 10-year Rainfall=4.88" Area (sf) CN Description 90,350 36 Woods, Fair, HSG A 25,000 43 Woods/grass comb., Fair, HSG A 115,350 38 Weighted Average 115,350 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.1 50 0.0400 0.09 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 3.7 280 0.0640 1.26 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 12.8 330 Total Subcatchment 4Ex: Pre-Development Watershed - 4 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Type III 24-hr 10-year Rainfall=4.88" Runoff Area=115,350 sf Runoff Volume=0.032 af Runoff Depth=0.15" Flow Length=330' Tc=12.8 min CN=38 0.05 cfs Type III 24-hr 10-year Rainfall=4.88"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 16HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 5Ex: Pre-Development Watershed - 5 Runoff = 0.01 cfs @ 14.81 hrs, Volume= 0.004 af, Depth= 0.12" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 10-year Rainfall=4.88" Area (sf) CN Description 15,999 36 Woods, Fair, HSG A 4,000 43 Woods/grass comb., Fair, HSG A 19,999 37 Weighted Average 19,999 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.1 50 0.0400 0.09 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 2.7 160 0.0380 0.97 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 11.8 210 Total Subcatchment 5Ex: Pre-Development Watershed - 5 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.008 0.007 0.007 0.006 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Type III 24-hr 10-year Rainfall=4.88" Runoff Area=19,999 sf Runoff Volume=0.004 af Runoff Depth=0.12" Flow Length=210' Tc=11.8 min CN=37 0.01 cfs Type III 24-hr 10-year Rainfall=4.88"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 17HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 6Ex: Pre-Development Watershed - 6 Runoff = 0.01 cfs @ 14.93 hrs, Volume= 0.006 af, Depth= 0.12" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 10-year Rainfall=4.88" Area (sf) CN Description 19,480 36 Woods, Fair, HSG A 5,000 43 Woods/grass comb., Fair, HSG A 24,480 37 Weighted Average 24,480 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.9 50 0.0100 0.05 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 2.6 200 0.0650 1.27 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 18.5 250 Total Subcatchment 6Ex: Pre-Development Watershed - 6 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.009 0.009 0.008 0.008 0.007 0.007 0.006 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Type III 24-hr 10-year Rainfall=4.88" Runoff Area=24,480 sf Runoff Volume=0.006 af Runoff Depth=0.12" Flow Length=250' Tc=18.5 min CN=37 0.01 cfs Type III 24-hr 10-year Rainfall=4.88"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 18HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Link EX: Total Site Runoff - Pre-Development Inflow Area = 11.964 ac, 0.00% Impervious, Inflow Depth = 0.14" for 10-year event Inflow = 0.23 cfs @ 14.66 hrs, Volume= 0.141 af Primary = 0.23 cfs @ 14.66 hrs, Volume= 0.141 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Link EX: Total Site Runoff - Pre-Development Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.25 0.24 0.23 0.22 0.21 0.2 0.19 0.18 0.17 0.16 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 Inflow Area=11.964 ac 0.23 cfs 0.23 cfs Type III 24-hr 25-year Rainfall=5.84"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 19HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Time span=0.00-28.00 hrs, dt=0.03 hrs, 934 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=100,376 sf 0.00% Impervious Runoff Depth=0.35"Subcatchment 1Ex: Pre-Development Flow Length=560' Tc=15.2 min CN=38 Runoff=0.24 cfs 0.067 af Runoff Area=30,064 sf 0.00% Impervious Runoff Depth=0.30"Subcatchment 2Ex: Pre-Development Flow Length=230' Slope=0.0600 '/' Tc=10.2 min CN=37 Runoff=0.06 cfs 0.018 af Runoff Area=230,874 sf 0.00% Impervious Runoff Depth=0.35"Subcatchment 3Ex: Pre-Development Flow Length=700' Tc=17.3 min CN=38 Runoff=0.52 cfs 0.155 af Runoff Area=115,350 sf 0.00% Impervious Runoff Depth=0.35"Subcatchment 4Ex: Pre-Development Flow Length=330' Tc=12.8 min CN=38 Runoff=0.28 cfs 0.078 af Runoff Area=19,999 sf 0.00% Impervious Runoff Depth=0.30"Subcatchment 5Ex: Pre-Development Flow Length=210' Tc=11.8 min CN=37 Runoff=0.04 cfs 0.012 af Runoff Area=24,480 sf 0.00% Impervious Runoff Depth=0.30"Subcatchment 6Ex: Pre-Development Flow Length=250' Tc=18.5 min CN=37 Runoff=0.04 cfs 0.014 af Inflow=1.16 cfs 0.344 afLink EX: Total Site Runoff - Pre-Development Primary=1.16 cfs 0.344 af Total Runoff Area = 11.964 ac Runoff Volume = 0.344 af Average Runoff Depth = 0.34" 100.00% Pervious = 11.964 ac 0.00% Impervious = 0.000 ac Type III 24-hr 25-year Rainfall=5.84"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 20HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1Ex: Pre-Development Watershed - 1 Runoff = 0.24 cfs @ 12.53 hrs, Volume= 0.067 af, Depth= 0.35" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 25-year Rainfall=5.84" Area (sf) CN Description 74,376 36 Woods, Fair, HSG A 26,000 43 Woods/grass comb., Fair, HSG A 100,376 38 Weighted Average 100,376 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.8 50 0.0600 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 7.4 510 0.0530 1.15 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 15.2 560 Total Subcatchment 1Ex: Pre-Development Watershed - 1 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.26 0.25 0.24 0.23 0.22 0.21 0.2 0.19 0.18 0.17 0.16 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 Type III 24-hr 25-year Rainfall=5.84" Runoff Area=100,376 sf Runoff Volume=0.067 af Runoff Depth=0.35" Flow Length=560' Tc=15.2 min CN=38 0.24 cfs Type III 24-hr 25-year Rainfall=5.84"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 21HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2Ex: Pre-Development Watershed - 2 Runoff = 0.06 cfs @ 12.48 hrs, Volume= 0.018 af, Depth= 0.30" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 25-year Rainfall=5.84" Area (sf) CN Description 25,064 36 Woods, Fair, HSG A 5,000 43 Woods/grass comb., Fair, HSG A 30,064 37 Weighted Average 30,064 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.8 50 0.0600 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 2.4 180 0.0600 1.22 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 10.2 230 Total Subcatchment 2Ex: Pre-Development Watershed - 2 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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 Type III 24-hr 25-year Rainfall=5.84" Runoff Area=30,064 sf Runoff Volume=0.018 af Runoff Depth=0.30" Flow Length=230' Slope=0.0600 '/' Tc=10.2 min CN=37 0.06 cfs Type III 24-hr 25-year Rainfall=5.84"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 22HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 3Ex: Pre-Development Watershed - 3 Runoff = 0.52 cfs @ 12.56 hrs, Volume= 0.155 af, Depth= 0.35" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 25-year Rainfall=5.84" Area (sf) CN Description 175,874 36 Woods, Fair, HSG A 55,000 43 Woods/grass comb., Fair, HSG A 230,874 38 Weighted Average 230,874 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.8 50 0.0600 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 9.5 650 0.0520 1.14 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 17.3 700 Total Subcatchment 3Ex: Pre-Development Watershed - 3 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Type III 24-hr 25-year Rainfall=5.84" Runoff Area=230,874 sf Runoff Volume=0.155 af Runoff Depth=0.35" Flow Length=700' Tc=17.3 min CN=38 0.52 cfs Type III 24-hr 25-year Rainfall=5.84"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 23HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 4Ex: Pre-Development Watershed - 4 Runoff = 0.28 cfs @ 12.49 hrs, Volume= 0.078 af, Depth= 0.35" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 25-year Rainfall=5.84" Area (sf) CN Description 90,350 36 Woods, Fair, HSG A 25,000 43 Woods/grass comb., Fair, HSG A 115,350 38 Weighted Average 115,350 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.1 50 0.0400 0.09 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 3.7 280 0.0640 1.26 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 12.8 330 Total Subcatchment 4Ex: Pre-Development Watershed - 4 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Type III 24-hr 25-year Rainfall=5.84" Runoff Area=115,350 sf Runoff Volume=0.078 af Runoff Depth=0.35" Flow Length=330' Tc=12.8 min CN=38 0.28 cfs Type III 24-hr 25-year Rainfall=5.84"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 24HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 5Ex: Pre-Development Watershed - 5 Runoff = 0.04 cfs @ 12.51 hrs, Volume= 0.012 af, Depth= 0.30" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 25-year Rainfall=5.84" Area (sf) CN Description 15,999 36 Woods, Fair, HSG A 4,000 43 Woods/grass comb., Fair, HSG A 19,999 37 Weighted Average 19,999 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.1 50 0.0400 0.09 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 2.7 160 0.0380 0.97 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 11.8 210 Total Subcatchment 5Ex: Pre-Development Watershed - 5 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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 Type III 24-hr 25-year Rainfall=5.84" Runoff Area=19,999 sf Runoff Volume=0.012 af Runoff Depth=0.30" Flow Length=210' Tc=11.8 min CN=37 0.04 cfs Type III 24-hr 25-year Rainfall=5.84"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 25HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 6Ex: Pre-Development Watershed - 6 Runoff = 0.04 cfs @ 12.61 hrs, Volume= 0.014 af, Depth= 0.30" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 25-year Rainfall=5.84" Area (sf) CN Description 19,480 36 Woods, Fair, HSG A 5,000 43 Woods/grass comb., Fair, HSG A 24,480 37 Weighted Average 24,480 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.9 50 0.0100 0.05 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 2.6 200 0.0650 1.27 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 18.5 250 Total Subcatchment 6Ex: Pre-Development Watershed - 6 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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 Type III 24-hr 25-year Rainfall=5.84" Runoff Area=24,480 sf Runoff Volume=0.014 af Runoff Depth=0.30" Flow Length=250' Tc=18.5 min CN=37 0.04 cfs Type III 24-hr 25-year Rainfall=5.84"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 26HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Link EX: Total Site Runoff - Pre-Development Inflow Area = 11.964 ac, 0.00% Impervious, Inflow Depth = 0.34" for 25-year event Inflow = 1.16 cfs @ 12.53 hrs, Volume= 0.344 af Primary = 1.16 cfs @ 12.53 hrs, Volume= 0.344 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Link EX: Total Site Runoff - Pre-Development Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Inflow Area=11.964 ac 1.16 cfs 1.16 cfs Type III 24-hr 100-year Rainfall=7.31"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 27HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Time span=0.00-28.00 hrs, dt=0.03 hrs, 934 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=100,376 sf 0.00% Impervious Runoff Depth=0.80"Subcatchment 1Ex: Pre-Development Flow Length=560' Tc=15.2 min CN=38 Runoff=0.88 cfs 0.154 af Runoff Area=30,064 sf 0.00% Impervious Runoff Depth=0.73"Subcatchment 2Ex: Pre-Development Flow Length=230' Slope=0.0600 '/' Tc=10.2 min CN=37 Runoff=0.24 cfs 0.042 af Runoff Area=230,874 sf 0.00% Impervious Runoff Depth=0.80"Subcatchment 3Ex: Pre-Development Flow Length=700' Tc=17.3 min CN=38 Runoff=1.97 cfs 0.355 af Runoff Area=115,350 sf 0.00% Impervious Runoff Depth=0.80"Subcatchment 4Ex: Pre-Development Flow Length=330' Tc=12.8 min CN=38 Runoff=1.04 cfs 0.177 af Runoff Area=19,999 sf 0.00% Impervious Runoff Depth=0.73"Subcatchment 5Ex: Pre-Development Flow Length=210' Tc=11.8 min CN=37 Runoff=0.15 cfs 0.028 af Runoff Area=24,480 sf 0.00% Impervious Runoff Depth=0.73"Subcatchment 6Ex: Pre-Development Flow Length=250' Tc=18.5 min CN=37 Runoff=0.17 cfs 0.034 af Inflow=4.41 cfs 0.791 afLink EX: Total Site Runoff - Pre-Development Primary=4.41 cfs 0.791 af Total Runoff Area = 11.964 ac Runoff Volume = 0.791 af Average Runoff Depth = 0.79" 100.00% Pervious = 11.964 ac 0.00% Impervious = 0.000 ac Type III 24-hr 100-year Rainfall=7.31"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 28HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1Ex: Pre-Development Watershed - 1 Runoff = 0.88 cfs @ 12.39 hrs, Volume= 0.154 af, Depth= 0.80" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 100-year Rainfall=7.31" Area (sf) CN Description 74,376 36 Woods, Fair, HSG A 26,000 43 Woods/grass comb., Fair, HSG A 100,376 38 Weighted Average 100,376 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.8 50 0.0600 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 7.4 510 0.0530 1.15 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 15.2 560 Total Subcatchment 1Ex: Pre-Development Watershed - 1 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (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 Type III 24-hr 100-year Rainfall=7.31" Runoff Area=100,376 sf Runoff Volume=0.154 af Runoff Depth=0.80" Flow Length=560' Tc=15.2 min CN=38 0.88 cfs Type III 24-hr 100-year Rainfall=7.31"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 29HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2Ex: Pre-Development Watershed - 2 Runoff = 0.24 cfs @ 12.34 hrs, Volume= 0.042 af, Depth= 0.73" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 100-year Rainfall=7.31" Area (sf) CN Description 25,064 36 Woods, Fair, HSG A 5,000 43 Woods/grass comb., Fair, HSG A 30,064 37 Weighted Average 30,064 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.8 50 0.0600 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 2.4 180 0.0600 1.22 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 10.2 230 Total Subcatchment 2Ex: Pre-Development Watershed - 2 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.26 0.25 0.24 0.23 0.22 0.21 0.2 0.19 0.18 0.17 0.16 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 Type III 24-hr 100-year Rainfall=7.31" Runoff Area=30,064 sf Runoff Volume=0.042 af Runoff Depth=0.73" Flow Length=230' Slope=0.0600 '/' Tc=10.2 min CN=37 0.24 cfs Type III 24-hr 100-year Rainfall=7.31"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 30HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 3Ex: Pre-Development Watershed - 3 Runoff = 1.97 cfs @ 12.43 hrs, Volume= 0.355 af, Depth= 0.80" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 100-year Rainfall=7.31" Area (sf) CN Description 175,874 36 Woods, Fair, HSG A 55,000 43 Woods/grass comb., Fair, HSG A 230,874 38 Weighted Average 230,874 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.8 50 0.0600 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 9.5 650 0.0520 1.14 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 17.3 700 Total Subcatchment 3Ex: Pre-Development Watershed - 3 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)2 1 0 Type III 24-hr 100-year Rainfall=7.31" Runoff Area=230,874 sf Runoff Volume=0.355 af Runoff Depth=0.80" Flow Length=700' Tc=17.3 min CN=38 1.97 cfs Type III 24-hr 100-year Rainfall=7.31"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 31HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 4Ex: Pre-Development Watershed - 4 Runoff = 1.04 cfs @ 12.35 hrs, Volume= 0.177 af, Depth= 0.80" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 100-year Rainfall=7.31" Area (sf) CN Description 90,350 36 Woods, Fair, HSG A 25,000 43 Woods/grass comb., Fair, HSG A 115,350 38 Weighted Average 115,350 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.1 50 0.0400 0.09 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 3.7 280 0.0640 1.26 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 12.8 330 Total Subcatchment 4Ex: Pre-Development Watershed - 4 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Type III 24-hr 100-year Rainfall=7.31" Runoff Area=115,350 sf Runoff Volume=0.177 af Runoff Depth=0.80" Flow Length=330' Tc=12.8 min CN=38 1.04 cfs Type III 24-hr 100-year Rainfall=7.31"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 32HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 5Ex: Pre-Development Watershed - 5 Runoff = 0.15 cfs @ 12.37 hrs, Volume= 0.028 af, Depth= 0.73" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 100-year Rainfall=7.31" Area (sf) CN Description 15,999 36 Woods, Fair, HSG A 4,000 43 Woods/grass comb., Fair, HSG A 19,999 37 Weighted Average 19,999 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.1 50 0.0400 0.09 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 2.7 160 0.0380 0.97 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 11.8 210 Total Subcatchment 5Ex: Pre-Development Watershed - 5 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.17 0.16 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 Type III 24-hr 100-year Rainfall=7.31" Runoff Area=19,999 sf Runoff Volume=0.028 af Runoff Depth=0.73" Flow Length=210' Tc=11.8 min CN=37 0.15 cfs Type III 24-hr 100-year Rainfall=7.31"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 33HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 6Ex: Pre-Development Watershed - 6 Runoff = 0.17 cfs @ 12.47 hrs, Volume= 0.034 af, Depth= 0.73" Routed to Link EX : Total Site Runoff - Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 100-year Rainfall=7.31" Area (sf) CN Description 19,480 36 Woods, Fair, HSG A 5,000 43 Woods/grass comb., Fair, HSG A 24,480 37 Weighted Average 24,480 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.9 50 0.0100 0.05 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 2.6 200 0.0650 1.27 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 18.5 250 Total Subcatchment 6Ex: Pre-Development Watershed - 6 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.19 0.18 0.17 0.16 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 Type III 24-hr 100-year Rainfall=7.31" Runoff Area=24,480 sf Runoff Volume=0.034 af Runoff Depth=0.73" Flow Length=250' Tc=18.5 min CN=37 0.17 cfs Type III 24-hr 100-year Rainfall=7.31"8807.Existing(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 34HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Link EX: Total Site Runoff - Pre-Development Inflow Area = 11.964 ac, 0.00% Impervious, Inflow Depth = 0.79" for 100-year event Inflow = 4.41 cfs @ 12.40 hrs, Volume= 0.791 af Primary = 4.41 cfs @ 12.40 hrs, Volume= 0.791 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Link EX: Total Site Runoff - Pre-Development Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)4 3 2 1 0 Inflow Area=11.964 ac 4.41 cfs 4.41 cfs M1 - Watershed Area M3 - Dwelling RoofsM2 - Watershed Area 1AS Runoff into Catch Basins - M1 1BS Direct Runoff into Swale - M1 2AS Runoff into Catch Basins - M2 2BS Direct Runoff into Swale - M2 3S Roof Runoff (per Dwelling) 1AR CB (2) CB's in Pavement 1BP (1) 28'x14' Leaching Facility - (2) 6'x6' Leach Pits, 14' O.C. with stone around 1BR CB (1) CB in Swale 1SW Dry Water Quality Swale 2AR CB (7) CB's in Pavement 2BP (1) 70'x28' Leaching Facility - Two Rows of (5) 6'x6' Leach Pits, 14' O.C. with stone around 2BR CB (2) CB in Swale 2SW Dry Water Quality Swale 3P (2) 10.5' x 6.33' x 3.5' Leaching Facilities (per Dwelling) - Each with (1) Cultec Recharger 330XLHD Unit and stone TSR Total Site Runoff - M1 & M2 Facilities Routing Diagram for 8807.M1 M2 M3(5.1.23) Prepared by J M O'Reilly & Associates Inc, Printed 6/6/2023 HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Subcat Reach Pond Link 8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 2HydroCAD® 10.20-2g s/n 08678 © 2022 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 Type III 24-hr Default 24.00 1 3.36 2 2 10-year Type III 24-hr Default 24.00 1 4.88 2 3 25-year Type III 24-hr Default 24.00 1 5.84 2 4 100-year Type III 24-hr Default 24.00 1 7.31 2 Type III 24-hr 2-year Rainfall=3.36"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 3HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Time span=0.00-28.00 hrs, dt=0.03 hrs, 934 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=23,930 sf 26.27% Impervious Runoff Depth=0.27"Subcatchment 1AS: Runoff into Catch Flow Length=160' Tc=6.0 min CN=54 Runoff=0.06 cfs 0.012 af Runoff Area=7,973 sf 0.00% Impervious Runoff Depth=0.00"Subcatchment 1BS: Direct Runoff into Swale Tc=6.0 min CN=39 Runoff=0.00 cfs 0.000 af Runoff Area=124,519 sf 27.01% Impervious Runoff Depth=0.27"Subcatchment 2AS: Runoff into Catch Flow Length=270' Tc=7.4 min CN=54 Runoff=0.32 cfs 0.064 af Runoff Area=53,147 sf 7.69% Impervious Runoff Depth=0.02"Subcatchment 2BS: Direct Runoff into Flow Length=380' Tc=6.3 min CN=42 Runoff=0.00 cfs 0.003 af Runoff Area=1,288 sf 100.00% Impervious Runoff Depth=3.13"Subcatchment 3S: Roof Runoff (per Flow Length=20' Slope=0.4000 '/' Tc=6.0 min CN=98 Runoff=0.10 cfs 0.008 af Peak Elev=51.39' Inflow=0.06 cfs 0.012 afPond 1AR: (2) CB's in Pavement 12.0" Round Culvert x 2.00 n=0.020 L=30.0' S=0.0267 '/' Outflow=0.06 cfs 0.012 af Peak Elev=41.30' Storage=0 cf Inflow=0.00 cfs 0.000 afPond 1BP: (1) 28'x14' Leaching Facility - (2) 6'x6' Discarded=0.00 cfs 0.000 af Primary=0.00 cfs 0.000 af Outflow=0.00 cfs 0.000 af Peak Elev=47.50' Inflow=0.00 cfs 0.000 afPond 1BR: (1) CB in Swale 12.0" Round Culvert n=0.020 L=10.0' S=0.0700 '/' Outflow=0.00 cfs 0.000 af Peak Elev=48.73' Storage=78 cf Inflow=0.06 cfs 0.012 afPond 1SW: Dry Water Quality Swale Discarded=0.02 cfs 0.012 af Primary=0.00 cfs 0.000 af Outflow=0.02 cfs 0.012 af Peak Elev=35.82' Inflow=0.32 cfs 0.064 afPond 2AR: (7) CB's in Pavement 12.0" Round Culvert x 7.00 n=0.020 L=20.0' S=0.0350 '/' Outflow=0.32 cfs 0.064 af Peak Elev=26.00' Storage=0 cf Inflow=0.00 cfs 0.000 afPond 2BP: (1) 70'x28' Leaching Facility - Two Discarded=0.00 cfs 0.000 af Primary=0.00 cfs 0.000 af Outflow=0.00 cfs 0.000 af Peak Elev=32.00' Inflow=0.00 cfs 0.000 afPond 2BR: (2) CB in Swale 12.0" Round Culvert x 2.00 n=0.020 L=25.0' S=0.0200 '/' Outflow=0.00 cfs 0.000 af Peak Elev=33.07' Storage=204 cf Inflow=0.32 cfs 0.067 afPond 2SW: Dry Water Quality Swale Discarded=0.16 cfs 0.067 af Primary=0.00 cfs 0.000 af Outflow=0.16 cfs 0.067 af Peak Elev=50.63' Storage=60 cf Inflow=0.10 cfs 0.008 afPond 3P: (2) 10.5' x 6.33' x 3.5' Leaching Outflow=0.03 cfs 0.008 af Inflow=0.00 cfs 0.000 afLink TSR: Total Site Runoff - M1 & M2 Facilities Primary=0.00 cfs 0.000 af Total Runoff Area = 4.841 ac Runoff Volume = 0.087 af Average Runoff Depth = 0.22" 78.52% Pervious = 3.801 ac 21.48% Impervious = 1.040 ac Type III 24-hr 2-year Rainfall=3.36"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 4HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1AS: Runoff into Catch Basins - M1 Runoff = 0.06 cfs @ 12.33 hrs, Volume= 0.012 af, Depth= 0.27" Routed to Pond 1AR : (2) CB's in Pavement Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 2-year Rainfall=3.36" Area (sf) CN Description 6,286 98 Paved parking, HSG A 15,144 39 >75% Grass cover, Good, HSG A 2,500 36 Woods, Fair, HSG A 23,930 54 Weighted Average 17,644 73.73% Pervious Area 6,286 26.27% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.2 50 0.0600 0.16 Sheet Flow, Grass: Dense n= 0.240 P2= 3.36" 0.5 50 0.0600 1.71 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.3 60 0.0300 3.52 Shallow Concentrated Flow, Paved Kv= 20.3 fps 6.0 160 Total Subcatchment 1AS: Runoff into Catch Basins - M1 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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 Type III 24-hr 2-year Rainfall=3.36" Runoff Area=23,930 sf Runoff Volume=0.012 af Runoff Depth=0.27" Flow Length=160' Tc=6.0 min CN=54 0.06 cfs Type III 24-hr 2-year Rainfall=3.36"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 5HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1BS: Direct Runoff into Swale - M1 Runoff = 0.00 cfs @ 23.83 hrs, Volume= 0.000 af, Depth= 0.00" Routed to Pond 1SW : Dry Water Quality Swale Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 2-year Rainfall=3.36" Area (sf) CN Description 7,973 39 >75% Grass cover, Good, HSG A 7,973 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, (minimum) 5.0 0 Total, Increased to minimum Tc = 6.0 min Subcatchment 1BS: Direct Runoff into Swale - M1 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 0 0 0 0 0 0 0 0 0 Type III 24-hr 2-year Rainfall=3.36" Runoff Area=7,973 sf Runoff Volume=0.000 af Runoff Depth=0.00" Tc=6.0 min CN=39 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 6HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2AS: Runoff into Catch Basins - M2 Runoff = 0.32 cfs @ 12.35 hrs, Volume= 0.064 af, Depth= 0.27" Routed to Pond 2AR : (7) CB's in Pavement Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 2-year Rainfall=3.36" Area (sf) CN Description 33,633 98 Paved parking, HSG A 48,641 39 >75% Grass cover, Good, HSG A 42,245 36 Woods, Fair, HSG A 124,519 54 Weighted Average 90,886 72.99% Pervious Area 33,633 27.01% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.5 50 0.0500 0.15 Sheet Flow, Grass: Dense n= 0.240 P2= 3.36" 1.5 90 0.0200 0.99 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.4 130 0.0600 4.97 Shallow Concentrated Flow, Paved Kv= 20.3 fps 7.4 270 Total Subcatchment 2AS: Runoff into Catch Basins - M2 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Type III 24-hr 2-year Rainfall=3.36" Runoff Area=124,519 sf Runoff Volume=0.064 af Runoff Depth=0.27" Flow Length=270' Tc=7.4 min CN=54 0.32 cfs Type III 24-hr 2-year Rainfall=3.36"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 7HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2BS: Direct Runoff into Swale - M2 Runoff = 0.00 cfs @ 17.07 hrs, Volume= 0.003 af, Depth= 0.02" Routed to Pond 2SW : Dry Water Quality Swale Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 2-year Rainfall=3.36" Area (sf) CN Description 25,000 36 Woods, Fair, HSG A 24,058 39 >75% Grass cover, Good, HSG A 4,089 98 Paved parking, HSG A 53,147 42 Weighted Average 49,058 92.31% Pervious Area 4,089 7.69% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.5 50 0.1600 0.24 Sheet Flow, Grass: Dense n= 0.240 P2= 3.36" 2.8 330 0.0800 1.98 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 6.3 380 Total Subcatchment 2BS: Direct Runoff into Swale - M2 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.004 0.004 0.004 0.003 0.003 0.003 0.003 0.003 0.002 0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0 Type III 24-hr 2-year Rainfall=3.36" Runoff Area=53,147 sf Runoff Volume=0.003 af Runoff Depth=0.02" Flow Length=380' Tc=6.3 min CN=42 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 8HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: Roof Runoff (per Dwelling) Runoff = 0.10 cfs @ 12.08 hrs, Volume= 0.008 af, Depth= 3.13" Routed to Pond 3P : (2) 10.5' x 6.33' x 3.5' Leaching Facilities (per Dwelling) - Each with (1) Cultec Recharger 330XLHD Unit and stone Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 2-year Rainfall=3.36" Area (sf) CN Description 1,288 98 Roofs, HSG A 1,288 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.1 20 0.4000 3.33 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.25" 0.1 20 Total, Increased to minimum Tc = 6.0 min Subcatchment 3S: Roof Runoff (per Dwelling) Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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 Type III 24-hr 2-year Rainfall=3.36" Runoff Area=1,288 sf Runoff Volume=0.008 af Runoff Depth=3.13" Flow Length=20' Slope=0.4000 '/' Tc=6.0 min CN=98 0.10 cfs Type III 24-hr 2-year Rainfall=3.36"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 9HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1AR: (2) CB's in Pavement Inflow Area = 0.549 ac, 26.27% Impervious, Inflow Depth = 0.27" for 2-year event Inflow = 0.06 cfs @ 12.33 hrs, Volume= 0.012 af Outflow = 0.06 cfs @ 12.33 hrs, Volume= 0.012 af, Atten= 0%, Lag= 0.0 min Primary = 0.06 cfs @ 12.33 hrs, Volume= 0.012 af Routed to Pond 1SW : Dry Water Quality Swale Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 51.39' @ 12.33 hrs Flood Elev= 53.80' Device Routing Invert Outlet Devices #1 Primary 51.30'12.0" Round Culvert X 2.00 L= 30.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 51.30' / 50.50' S= 0.0267 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.79 sf Primary OutFlow Max=0.06 cfs @ 12.33 hrs HW=51.39' TW=48.59' (Dynamic Tailwater) 1=Culvert (Inlet Controls 0.06 cfs @ 0.83 fps) Pond 1AR: (2) CB's in Pavement Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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=0.549 ac Peak Elev=51.39' 12.0" Round Culvert x 2.00 n=0.020 L=30.0' S=0.0267 '/' 0.06 cfs 0.06 cfs Type III 24-hr 2-year Rainfall=3.36"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 10HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1BP: (1) 28'x14' Leaching Facility - (2) 6'x6' Leach Pits, 14' O.C. with stone around Inflow Area = 0.732 ac, 19.70% Impervious, Inflow Depth = 0.00" for 2-year event Inflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Outflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 0%, Lag= 0.0 min Discarded = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - M1 & M2 Facilities Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 41.30' @ 0.00 hrs Surf.Area= 392 sf Storage= 0 cf Plug-Flow detention time= (not calculated: initial storage exceeds outflow) Center-of-Mass det. time= (not calculated: no inflow) Volume Invert Avail.Storage Storage Description #1 41.30' 967 cf 14.00'W x 28.00'L x 6.50'H Prismatoid 2,548 cf Overall - 398 cf Embedded = 2,150 cf x 45.0% Voids #2 41.80' 339 cf 6.00'D x 6.00'H Vertical Cone/Cylinder x 2 Inside #1 398 cf Overall - 3.0" Wall Thickness = 339 cf 1,307 cf Total Available Storage Device Routing Invert Outlet Devices #1 Discarded 41.30'8.270 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 47.70'10.0' long (Profile 6) Leaching Overflow Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.00 cfs @ 0.00 hrs HW=41.30' (Free Discharge) 1=Exfiltration ( Controls 0.00 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=41.30' TW=0.00' (Dynamic Tailwater) 2=Leaching Overflow ( Controls 0.00 cfs) Type III 24-hr 2-year Rainfall=3.36"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 11HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 1BP: (1) 28'x14' Leaching Facility - (2) 6'x6' Leach Pits, 14' O.C. with stone around Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Inflow Area=0.732 ac Peak Elev=41.30' Storage=0 cf 0.00 cfs 0.00 cfs 0.00 cfs 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 12HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1BR: (1) CB in Swale Inflow Area = 0.732 ac, 19.70% Impervious, Inflow Depth = 0.00" for 2-year event Inflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Outflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 0%, Lag= 0.0 min Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Pond 1BP : (1) 28'x14' Leaching Facility - (2) 6'x6' Leach Pits, 14' O.C. with stone around Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 47.50' @ 0.00 hrs Flood Elev= 50.00' Device Routing Invert Outlet Devices #1 Primary 47.50'12.0" Round Culvert L= 10.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 47.50' / 46.80' S= 0.0700 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.79 sf Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=47.50' TW=41.30' (Dynamic Tailwater) 1=Culvert ( Controls 0.00 cfs) Pond 1BR: (1) CB in Swale Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Inflow Area=0.732 ac Peak Elev=47.50' 12.0" Round Culvert n=0.020 L=10.0' S=0.0700 '/' 0.00 cfs 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 13HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1SW: Dry Water Quality Swale Inflow Area = 0.732 ac, 19.70% Impervious, Inflow Depth = 0.20" for 2-year event Inflow = 0.06 cfs @ 12.33 hrs, Volume= 0.012 af Outflow = 0.02 cfs @ 13.83 hrs, Volume= 0.012 af, Atten= 68%, Lag= 90.4 min Discarded = 0.02 cfs @ 13.83 hrs, Volume= 0.012 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Pond 1BR : (1) CB in Swale Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 48.73' @ 13.83 hrs Surf.Area= 359 sf Storage= 78 cf Plug-Flow detention time= 34.0 min calculated for 0.012 af (100% of inflow) Center-of-Mass det. time= 33.9 min ( 989.0 - 955.1 ) Volume Invert Avail.Storage Storage Description #1 48.50' 2,417 cf Dry Water Quality Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 48.50 319 92.0 0 0 319 50.00 624 111.0 695 695 662 50.50 738 117.0 340 1,035 784 52.00 1,118 136.0 1,382 2,417 1,212 Device Routing Invert Outlet Devices #1 Discarded 48.50'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 50.00'24.0" x 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Discarded OutFlow Max=0.02 cfs @ 13.83 hrs HW=48.73' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.02 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=48.50' TW=47.50' (Dynamic Tailwater) 2=Orifice/Grate ( Controls 0.00 cfs) Type III 24-hr 2-year Rainfall=3.36"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 14HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 1SW: Dry Water Quality Swale Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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=0.732 ac Peak Elev=48.73' Storage=78 cf 0.06 cfs 0.02 cfs 0.02 cfs 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 15HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2AR: (7) CB's in Pavement Inflow Area = 2.859 ac, 27.01% Impervious, Inflow Depth = 0.27" for 2-year event Inflow = 0.32 cfs @ 12.35 hrs, Volume= 0.064 af Outflow = 0.32 cfs @ 12.35 hrs, Volume= 0.064 af, Atten= 0%, Lag= 0.0 min Primary = 0.32 cfs @ 12.35 hrs, Volume= 0.064 af Routed to Pond 2SW : Dry Water Quality Swale Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 35.82' @ 12.35 hrs Flood Elev= 38.20' Device Routing Invert Outlet Devices #1 Primary 35.70'12.0" Round Culvert X 7.00 L= 20.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 35.70' / 35.00' S= 0.0350 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.79 sf Primary OutFlow Max=0.32 cfs @ 12.35 hrs HW=35.81' TW=33.04' (Dynamic Tailwater) 1=Culvert (Inlet Controls 0.32 cfs @ 0.91 fps) Pond 2AR: (7) CB's in Pavement Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2.859 ac Peak Elev=35.82' 12.0" Round Culvert x 7.00 n=0.020 L=20.0' S=0.0350 '/' 0.32 cfs 0.32 cfs Type III 24-hr 2-year Rainfall=3.36"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 16HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2BP: (1) 70'x28' Leaching Facility - Two Rows of (5) 6'x6' Leach Pits, 14' O.C. with stone around Inflow Area = 4.079 ac, 21.23% Impervious, Inflow Depth = 0.00" for 2-year event Inflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Outflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 0%, Lag= 0.0 min Discarded = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - M1 & M2 Facilities Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 26.00' @ 0.00 hrs Surf.Area= 1,960 sf Storage= 0 cf Plug-Flow detention time= (not calculated: initial storage exceeds outflow) Center-of-Mass det. time= (not calculated: no inflow) Volume Invert Avail.Storage Storage Description #1 26.00' 4,120 cf 28.00'W x 70.00'L x 6.50'H Prismatoid 12,740 cf Overall - 3,584 cf Embedded = 9,156 cf x 45.0% Voids #2 26.50' 3,054 cf 6.00'D x 6.00'H Vertical Cone/Cylinder x 18 Inside #1 3,584 cf Overall - 3.0" Wall Thickness = 3,054 cf 7,174 cf Total Available Storage Device Routing Invert Outlet Devices #1 Discarded 26.00'8.270 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 32.40'10.0' long (Profile 6) Leaching Overflow Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.00 cfs @ 0.00 hrs HW=26.00' (Free Discharge) 1=Exfiltration ( Controls 0.00 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=26.00' TW=0.00' (Dynamic Tailwater) 2=Leaching Overflow ( Controls 0.00 cfs) Type III 24-hr 2-year Rainfall=3.36"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 17HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 2BP: (1) 70'x28' Leaching Facility - Two Rows of (5) 6'x6' Leach Pits, 14' O.C. with stone around Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Inflow Area=4.079 ac Peak Elev=26.00' Storage=0 cf 0.00 cfs 0.00 cfs 0.00 cfs 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 18HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2BR: (2) CB in Swale Inflow Area = 4.079 ac, 21.23% Impervious, Inflow Depth = 0.00" for 2-year event Inflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Outflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 0%, Lag= 0.0 min Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Pond 2BP : (1) 70'x28' Leaching Facility - Two Rows of (5) 6'x6' Leach Pits, 14' O.C. with stone around Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 32.00' @ 0.00 hrs Flood Elev= 34.50' Device Routing Invert Outlet Devices #1 Primary 32.00'12.0" Round Culvert X 2.00 L= 25.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 32.00' / 31.50' S= 0.0200 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.79 sf Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=32.00' TW=26.00' (Dynamic Tailwater) 1=Culvert ( Controls 0.00 cfs) Pond 2BR: (2) CB in Swale Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Inflow Area=4.079 ac Peak Elev=32.00' 12.0" Round Culvert x 2.00 n=0.020 L=25.0' S=0.0200 '/' 0.00 cfs 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 19HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2SW: Dry Water Quality Swale Inflow Area = 4.079 ac, 21.23% Impervious, Inflow Depth = 0.20" for 2-year event Inflow = 0.32 cfs @ 12.35 hrs, Volume= 0.067 af Outflow = 0.16 cfs @ 12.67 hrs, Volume= 0.067 af, Atten= 49%, Lag= 19.2 min Discarded = 0.16 cfs @ 12.67 hrs, Volume= 0.067 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Pond 2BR : (2) CB in Swale Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 33.07' @ 12.67 hrs Surf.Area= 2,921 sf Storage= 204 cf Plug-Flow detention time= 6.7 min calculated for 0.067 af (100% of inflow) Center-of-Mass det. time= 6.7 min ( 969.5 - 962.8 ) Volume Invert Avail.Storage Storage Description #1 33.00' 10,776 cf Dry Water Quality Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 33.00 2,890 222.0 0 0 2,890 34.00 3,346 234.0 3,115 3,115 3,382 34.50 3,583 241.0 1,732 4,847 3,672 36.00 4,334 259.0 5,929 10,776 4,480 Device Routing Invert Outlet Devices #1 Discarded 33.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 34.50'24.0" x 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Discarded OutFlow Max=0.16 cfs @ 12.67 hrs HW=33.07' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.16 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=33.00' TW=32.00' (Dynamic Tailwater) 2=Orifice/Grate ( Controls 0.00 cfs) Type III 24-hr 2-year Rainfall=3.36"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 20HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 2SW: Dry Water Quality Swale Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=4.079 ac Peak Elev=33.07' Storage=204 cf 0.32 cfs 0.16 cfs 0.16 cfs 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 21HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 3P: (2) 10.5' x 6.33' x 3.5' Leaching Facilities (per Dwelling) - Each with (1) Cultec Recharger 330XLHD Unit and stone Inflow Area = 0.030 ac,100.00% Impervious, Inflow Depth = 3.13" for 2-year event Inflow = 0.10 cfs @ 12.08 hrs, Volume= 0.008 af Outflow = 0.03 cfs @ 11.88 hrs, Volume= 0.008 af, Atten= 73%, Lag= 0.0 min Discarded = 0.03 cfs @ 11.88 hrs, Volume= 0.008 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 50.63' @ 12.44 hrs Surf.Area= 133 sf Storage= 60 cf Plug-Flow detention time= 10.6 min calculated for 0.008 af (100% of inflow) Center-of-Mass det. time= 10.6 min ( 766.0 - 755.4 ) Volume Invert Avail.Storage Storage Description #1 50.00' 127 cf Cultec R-330XLHD x 2 Inside #2 Effective Size= 47.8"W x 30.0"H => 7.45 sf x 7.00'L = 52.2 cf Overall Size= 52.0"W x 30.5"H x 8.50'L with 1.50' Overlap Row Length Adjustment= +1.50' x 7.45 sf x 2 rows #2 50.00' 155 cf 6.33'W x 10.50'L x 3.54'H Prismatoid x 2 471 cf Overall - 127 cf Embedded = 344 cf x 45.0% Voids 281 cf Total Available Storage Device Routing Invert Outlet Devices #1 Discarded 50.00'8.270 in/hr Exfiltration over Horizontal area Phase-In= 0.01' Discarded OutFlow Max=0.03 cfs @ 11.88 hrs HW=50.04' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.03 cfs) Type III 24-hr 2-year Rainfall=3.36"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 22HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 3P: (2) 10.5' x 6.33' x 3.5' Leaching Facilities (per Dwelling) - Each with (1) Cultec Recharger 330XLHD Unit and stone Inflow Discarded Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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=0.030 ac Peak Elev=50.63' Storage=60 cf 0.10 cfs 0.03 cfs Type III 24-hr 2-year Rainfall=3.36"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 23HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Link TSR: Total Site Runoff - M1 & M2 Facilities Inflow Area = 4.811 ac, 21.00% Impervious, Inflow Depth = 0.00" for 2-year event Inflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Link TSR: Total Site Runoff - M1 & M2 Facilities Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Inflow Area=4.811 ac 0.00 cfs 0.00 cfs Type III 24-hr 10-year Rainfall=4.88"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 24HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Time span=0.00-28.00 hrs, dt=0.03 hrs, 934 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=23,930 sf 26.27% Impervious Runoff Depth=0.86"Subcatchment 1AS: Runoff into Catch Flow Length=160' Tc=6.0 min CN=54 Runoff=0.42 cfs 0.039 af Runoff Area=7,973 sf 0.00% Impervious Runoff Depth=0.18"Subcatchment 1BS: Direct Runoff into Swale Tc=6.0 min CN=39 Runoff=0.00 cfs 0.003 af Runoff Area=124,519 sf 27.01% Impervious Runoff Depth=0.86"Subcatchment 2AS: Runoff into Catch Flow Length=270' Tc=7.4 min CN=54 Runoff=2.06 cfs 0.206 af Runoff Area=53,147 sf 7.69% Impervious Runoff Depth=0.28"Subcatchment 2BS: Direct Runoff into Flow Length=380' Tc=6.3 min CN=42 Runoff=0.11 cfs 0.029 af Runoff Area=1,288 sf 100.00% Impervious Runoff Depth=4.64"Subcatchment 3S: Roof Runoff (per Flow Length=20' Slope=0.4000 '/' Tc=6.0 min CN=98 Runoff=0.14 cfs 0.011 af Peak Elev=51.55' Inflow=0.42 cfs 0.039 afPond 1AR: (2) CB's in Pavement 12.0" Round Culvert x 2.00 n=0.020 L=30.0' S=0.0267 '/' Outflow=0.42 cfs 0.039 af Peak Elev=41.30' Storage=1 cf Inflow=0.02 cfs 0.002 afPond 1BP: (1) 28'x14' Leaching Facility - (2) 6'x6' Discarded=0.02 cfs 0.002 af Primary=0.00 cfs 0.000 af Outflow=0.02 cfs 0.002 af Peak Elev=47.58' Inflow=0.02 cfs 0.002 afPond 1BR: (1) CB in Swale 12.0" Round Culvert n=0.020 L=10.0' S=0.0700 '/' Outflow=0.02 cfs 0.002 af Peak Elev=50.01' Storage=700 cf Inflow=0.42 cfs 0.042 afPond 1SW: Dry Water Quality Swale Discarded=0.03 cfs 0.039 af Primary=0.02 cfs 0.002 af Outflow=0.06 cfs 0.042 af Peak Elev=36.00' Inflow=2.06 cfs 0.206 afPond 2AR: (7) CB's in Pavement 12.0" Round Culvert x 7.00 n=0.020 L=20.0' S=0.0350 '/' Outflow=2.06 cfs 0.206 af Peak Elev=26.00' Storage=0 cf Inflow=0.00 cfs 0.000 afPond 2BP: (1) 70'x28' Leaching Facility - Two Discarded=0.00 cfs 0.000 af Primary=0.00 cfs 0.000 af Outflow=0.00 cfs 0.000 af Peak Elev=32.00' Inflow=0.00 cfs 0.000 afPond 2BR: (2) CB in Swale 12.0" Round Culvert x 2.00 n=0.020 L=25.0' S=0.0200 '/' Outflow=0.00 cfs 0.000 af Peak Elev=34.33' Storage=4,242 cf Inflow=2.06 cfs 0.234 afPond 2SW: Dry Water Quality Swale Discarded=0.20 cfs 0.234 af Primary=0.00 cfs 0.000 af Outflow=0.20 cfs 0.234 af Peak Elev=51.27' Storage=120 cf Inflow=0.14 cfs 0.011 afPond 3P: (2) 10.5' x 6.33' x 3.5' Leaching Outflow=0.03 cfs 0.011 af Inflow=0.00 cfs 0.000 afLink TSR: Total Site Runoff - M1 & M2 Facilities Primary=0.00 cfs 0.000 af Total Runoff Area = 4.841 ac Runoff Volume = 0.288 af Average Runoff Depth = 0.71" 78.52% Pervious = 3.801 ac 21.48% Impervious = 1.040 ac Type III 24-hr 10-year Rainfall=4.88"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 25HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1AS: Runoff into Catch Basins - M1 Runoff = 0.42 cfs @ 12.11 hrs, Volume= 0.039 af, Depth= 0.86" Routed to Pond 1AR : (2) CB's in Pavement Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 10-year Rainfall=4.88" Area (sf) CN Description 6,286 98 Paved parking, HSG A 15,144 39 >75% Grass cover, Good, HSG A 2,500 36 Woods, Fair, HSG A 23,930 54 Weighted Average 17,644 73.73% Pervious Area 6,286 26.27% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.2 50 0.0600 0.16 Sheet Flow, Grass: Dense n= 0.240 P2= 3.36" 0.5 50 0.0600 1.71 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.3 60 0.0300 3.52 Shallow Concentrated Flow, Paved Kv= 20.3 fps 6.0 160 Total Subcatchment 1AS: Runoff into Catch Basins - M1 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.46 0.44 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Type III 24-hr 10-year Rainfall=4.88" Runoff Area=23,930 sf Runoff Volume=0.039 af Runoff Depth=0.86" Flow Length=160' Tc=6.0 min CN=54 0.42 cfs Type III 24-hr 10-year Rainfall=4.88"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 26HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1BS: Direct Runoff into Swale - M1 Runoff = 0.00 cfs @ 12.50 hrs, Volume= 0.003 af, Depth= 0.18" Routed to Pond 1SW : Dry Water Quality Swale Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 10-year Rainfall=4.88" Area (sf) CN Description 7,973 39 >75% Grass cover, Good, HSG A 7,973 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, (minimum) 5.0 0 Total, Increased to minimum Tc = 6.0 min Subcatchment 1BS: Direct Runoff into Swale - M1 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0 Type III 24-hr 10-year Rainfall=4.88" Runoff Area=7,973 sf Runoff Volume=0.003 af Runoff Depth=0.18" Tc=6.0 min CN=39 0.00 cfs Type III 24-hr 10-year Rainfall=4.88"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 27HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2AS: Runoff into Catch Basins - M2 Runoff = 2.06 cfs @ 12.13 hrs, Volume= 0.206 af, Depth= 0.86" Routed to Pond 2AR : (7) CB's in Pavement Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 10-year Rainfall=4.88" Area (sf) CN Description 33,633 98 Paved parking, HSG A 48,641 39 >75% Grass cover, Good, HSG A 42,245 36 Woods, Fair, HSG A 124,519 54 Weighted Average 90,886 72.99% Pervious Area 33,633 27.01% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.5 50 0.0500 0.15 Sheet Flow, Grass: Dense n= 0.240 P2= 3.36" 1.5 90 0.0200 0.99 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.4 130 0.0600 4.97 Shallow Concentrated Flow, Paved Kv= 20.3 fps 7.4 270 Total Subcatchment 2AS: Runoff into Catch Basins - M2 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)2 1 0 Type III 24-hr 10-year Rainfall=4.88" Runoff Area=124,519 sf Runoff Volume=0.206 af Runoff Depth=0.86" Flow Length=270' Tc=7.4 min CN=54 2.06 cfs Type III 24-hr 10-year Rainfall=4.88"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 28HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2BS: Direct Runoff into Swale - M2 Runoff = 0.11 cfs @ 12.40 hrs, Volume= 0.029 af, Depth= 0.28" Routed to Pond 2SW : Dry Water Quality Swale Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 10-year Rainfall=4.88" Area (sf) CN Description 25,000 36 Woods, Fair, HSG A 24,058 39 >75% Grass cover, Good, HSG A 4,089 98 Paved parking, HSG A 53,147 42 Weighted Average 49,058 92.31% Pervious Area 4,089 7.69% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.5 50 0.1600 0.24 Sheet Flow, Grass: Dense n= 0.240 P2= 3.36" 2.8 330 0.0800 1.98 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 6.3 380 Total Subcatchment 2BS: Direct Runoff into Swale - M2 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.12 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 Type III 24-hr 10-year Rainfall=4.88" Runoff Area=53,147 sf Runoff Volume=0.029 af Runoff Depth=0.28" Flow Length=380' Tc=6.3 min CN=42 0.11 cfs Type III 24-hr 10-year Rainfall=4.88"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 29HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: Roof Runoff (per Dwelling) Runoff = 0.14 cfs @ 12.08 hrs, Volume= 0.011 af, Depth= 4.64" Routed to Pond 3P : (2) 10.5' x 6.33' x 3.5' Leaching Facilities (per Dwelling) - Each with (1) Cultec Recharger 330XLHD Unit and stone Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 10-year Rainfall=4.88" Area (sf) CN Description 1,288 98 Roofs, HSG A 1,288 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.1 20 0.4000 3.33 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.25" 0.1 20 Total, Increased to minimum Tc = 6.0 min Subcatchment 3S: Roof Runoff (per Dwelling) Runoff Hydrograph Time (hours) 26242220181614121086420Flow (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 Type III 24-hr 10-year Rainfall=4.88" Runoff Area=1,288 sf Runoff Volume=0.011 af Runoff Depth=4.64" Flow Length=20' Slope=0.4000 '/' Tc=6.0 min CN=98 0.14 cfs Type III 24-hr 10-year Rainfall=4.88"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 30HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1AR: (2) CB's in Pavement Inflow Area = 0.549 ac, 26.27% Impervious, Inflow Depth = 0.86" for 10-year event Inflow = 0.42 cfs @ 12.11 hrs, Volume= 0.039 af Outflow = 0.42 cfs @ 12.11 hrs, Volume= 0.039 af, Atten= 0%, Lag= 0.0 min Primary = 0.42 cfs @ 12.11 hrs, Volume= 0.039 af Routed to Pond 1SW : Dry Water Quality Swale Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 51.55' @ 12.11 hrs Flood Elev= 53.80' Device Routing Invert Outlet Devices #1 Primary 51.30'12.0" Round Culvert X 2.00 L= 30.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 51.30' / 50.50' S= 0.0267 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.79 sf Primary OutFlow Max=0.41 cfs @ 12.11 hrs HW=51.55' TW=48.90' (Dynamic Tailwater) 1=Culvert (Inlet Controls 0.41 cfs @ 1.34 fps) Pond 1AR: (2) CB's in Pavement Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.46 0.44 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=0.549 ac Peak Elev=51.55' 12.0" Round Culvert x 2.00 n=0.020 L=30.0' S=0.0267 '/' 0.42 cfs 0.42 cfs Type III 24-hr 10-year Rainfall=4.88"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 31HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1BP: (1) 28'x14' Leaching Facility - (2) 6'x6' Leach Pits, 14' O.C. with stone around Inflow Area = 0.732 ac, 19.70% Impervious, Inflow Depth = 0.04" for 10-year event Inflow = 0.02 cfs @ 13.93 hrs, Volume= 0.002 af Outflow = 0.02 cfs @ 13.94 hrs, Volume= 0.002 af, Atten= 0%, Lag= 0.5 min Discarded = 0.02 cfs @ 13.94 hrs, Volume= 0.002 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - M1 & M2 Facilities Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 41.30' @ 13.94 hrs Surf.Area= 392 sf Storage= 1 cf Plug-Flow detention time= 0.4 min calculated for 0.002 af (100% of inflow) Center-of-Mass det. time= 0.4 min ( 873.7 - 873.4 ) Volume Invert Avail.Storage Storage Description #1 41.30' 967 cf 14.00'W x 28.00'L x 6.50'H Prismatoid 2,548 cf Overall - 398 cf Embedded = 2,150 cf x 45.0% Voids #2 41.80' 339 cf 6.00'D x 6.00'H Vertical Cone/Cylinder x 2 Inside #1 398 cf Overall - 3.0" Wall Thickness = 339 cf 1,307 cf Total Available Storage Device Routing Invert Outlet Devices #1 Discarded 41.30'8.270 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 47.70'10.0' long (Profile 6) Leaching Overflow Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.02 cfs @ 13.94 hrs HW=41.30' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.02 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=41.30' TW=0.00' (Dynamic Tailwater) 2=Leaching Overflow ( Controls 0.00 cfs) Type III 24-hr 10-year Rainfall=4.88"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 32HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 1BP: (1) 28'x14' Leaching Facility - (2) 6'x6' Leach Pits, 14' O.C. with stone around Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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=0.732 ac Peak Elev=41.30' Storage=1 cf 0.02 cfs 0.02 cfs 0.02 cfs 0.00 cfs Type III 24-hr 10-year Rainfall=4.88"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 33HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1BR: (1) CB in Swale Inflow Area = 0.732 ac, 19.70% Impervious, Inflow Depth = 0.04" for 10-year event Inflow = 0.02 cfs @ 13.93 hrs, Volume= 0.002 af Outflow = 0.02 cfs @ 13.93 hrs, Volume= 0.002 af, Atten= 0%, Lag= 0.0 min Primary = 0.02 cfs @ 13.93 hrs, Volume= 0.002 af Routed to Pond 1BP : (1) 28'x14' Leaching Facility - (2) 6'x6' Leach Pits, 14' O.C. with stone around Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 47.58' @ 13.93 hrs Flood Elev= 50.00' Device Routing Invert Outlet Devices #1 Primary 47.50'12.0" Round Culvert L= 10.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 47.50' / 46.80' S= 0.0700 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.79 sf Primary OutFlow Max=0.02 cfs @ 13.93 hrs HW=47.58' TW=41.30' (Dynamic Tailwater) 1=Culvert (Inlet Controls 0.02 cfs @ 0.76 fps) Pond 1BR: (1) CB in Swale Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.025 0.024 0.023 0.022 0.021 0.02 0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 Inflow Area=0.732 ac Peak Elev=47.58' 12.0" Round Culvert n=0.020 L=10.0' S=0.0700 '/' 0.02 cfs 0.02 cfs Type III 24-hr 10-year Rainfall=4.88"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 34HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1SW: Dry Water Quality Swale Inflow Area = 0.732 ac, 19.70% Impervious, Inflow Depth = 0.69" for 10-year event Inflow = 0.42 cfs @ 12.11 hrs, Volume= 0.042 af Outflow = 0.06 cfs @ 13.93 hrs, Volume= 0.042 af, Atten= 86%, Lag= 109.3 min Discarded = 0.03 cfs @ 13.93 hrs, Volume= 0.039 af Primary = 0.02 cfs @ 13.93 hrs, Volume= 0.002 af Routed to Pond 1BR : (1) CB in Swale Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 50.01' @ 13.93 hrs Surf.Area= 626 sf Storage= 700 cf Plug-Flow detention time= 246.0 min calculated for 0.042 af (99% of inflow) Center-of-Mass det. time= 239.0 min ( 1,145.7 - 906.8 ) Volume Invert Avail.Storage Storage Description #1 48.50' 2,417 cf Dry Water Quality Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 48.50 319 92.0 0 0 319 50.00 624 111.0 695 695 662 50.50 738 117.0 340 1,035 784 52.00 1,118 136.0 1,382 2,417 1,212 Device Routing Invert Outlet Devices #1 Discarded 48.50'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 50.00'24.0" x 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Discarded OutFlow Max=0.03 cfs @ 13.93 hrs HW=50.01' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.03 cfs) Primary OutFlow Max=0.02 cfs @ 13.93 hrs HW=50.01' TW=47.58' (Dynamic Tailwater) 2=Orifice/Grate (Weir Controls 0.02 cfs @ 0.31 fps) Type III 24-hr 10-year Rainfall=4.88"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 35HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 1SW: Dry Water Quality Swale Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.46 0.44 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=0.732 ac Peak Elev=50.01' Storage=700 cf 0.42 cfs 0.06 cfs 0.03 cfs 0.02 cfs Type III 24-hr 10-year Rainfall=4.88"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 36HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2AR: (7) CB's in Pavement Inflow Area = 2.859 ac, 27.01% Impervious, Inflow Depth = 0.86" for 10-year event Inflow = 2.06 cfs @ 12.13 hrs, Volume= 0.206 af Outflow = 2.06 cfs @ 12.13 hrs, Volume= 0.206 af, Atten= 0%, Lag= 0.0 min Primary = 2.06 cfs @ 12.13 hrs, Volume= 0.206 af Routed to Pond 2SW : Dry Water Quality Swale Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 36.00' @ 12.13 hrs Flood Elev= 38.20' Device Routing Invert Outlet Devices #1 Primary 35.70'12.0" Round Culvert X 7.00 L= 20.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 35.70' / 35.00' S= 0.0350 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.79 sf Primary OutFlow Max=2.03 cfs @ 12.13 hrs HW=36.00' TW=33.23' (Dynamic Tailwater) 1=Culvert (Inlet Controls 2.03 cfs @ 1.47 fps) Pond 2AR: (7) CB's in Pavement Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)2 1 0 Inflow Area=2.859 ac Peak Elev=36.00' 12.0" Round Culvert x 7.00 n=0.020 L=20.0' S=0.0350 '/' 2.06 cfs 2.06 cfs Type III 24-hr 10-year Rainfall=4.88"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 37HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2BP: (1) 70'x28' Leaching Facility - Two Rows of (5) 6'x6' Leach Pits, 14' O.C. with stone around Inflow Area = 4.079 ac, 21.23% Impervious, Inflow Depth = 0.00" for 10-year event Inflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Outflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 0%, Lag= 0.0 min Discarded = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - M1 & M2 Facilities Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 26.00' @ 0.00 hrs Surf.Area= 1,960 sf Storage= 0 cf Plug-Flow detention time= (not calculated: initial storage exceeds outflow) Center-of-Mass det. time= (not calculated: no inflow) Volume Invert Avail.Storage Storage Description #1 26.00' 4,120 cf 28.00'W x 70.00'L x 6.50'H Prismatoid 12,740 cf Overall - 3,584 cf Embedded = 9,156 cf x 45.0% Voids #2 26.50' 3,054 cf 6.00'D x 6.00'H Vertical Cone/Cylinder x 18 Inside #1 3,584 cf Overall - 3.0" Wall Thickness = 3,054 cf 7,174 cf Total Available Storage Device Routing Invert Outlet Devices #1 Discarded 26.00'8.270 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 32.40'10.0' long (Profile 6) Leaching Overflow Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.00 cfs @ 0.00 hrs HW=26.00' (Free Discharge) 1=Exfiltration ( Controls 0.00 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=26.00' TW=0.00' (Dynamic Tailwater) 2=Leaching Overflow ( Controls 0.00 cfs) Type III 24-hr 10-year Rainfall=4.88"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 38HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 2BP: (1) 70'x28' Leaching Facility - Two Rows of (5) 6'x6' Leach Pits, 14' O.C. with stone around Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Inflow Area=4.079 ac Peak Elev=26.00' Storage=0 cf 0.00 cfs 0.00 cfs 0.00 cfs 0.00 cfs Type III 24-hr 10-year Rainfall=4.88"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 39HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2BR: (2) CB in Swale Inflow Area = 4.079 ac, 21.23% Impervious, Inflow Depth = 0.00" for 10-year event Inflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Outflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 0%, Lag= 0.0 min Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Pond 2BP : (1) 70'x28' Leaching Facility - Two Rows of (5) 6'x6' Leach Pits, 14' O.C. with stone around Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 32.00' @ 0.00 hrs Flood Elev= 34.50' Device Routing Invert Outlet Devices #1 Primary 32.00'12.0" Round Culvert X 2.00 L= 25.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 32.00' / 31.50' S= 0.0200 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.79 sf Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=32.00' TW=26.00' (Dynamic Tailwater) 1=Culvert ( Controls 0.00 cfs) Pond 2BR: (2) CB in Swale Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Inflow Area=4.079 ac Peak Elev=32.00' 12.0" Round Culvert x 2.00 n=0.020 L=25.0' S=0.0200 '/' 0.00 cfs 0.00 cfs Type III 24-hr 10-year Rainfall=4.88"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 40HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2SW: Dry Water Quality Swale Inflow Area = 4.079 ac, 21.23% Impervious, Inflow Depth = 0.69" for 10-year event Inflow = 2.06 cfs @ 12.13 hrs, Volume= 0.234 af Outflow = 0.20 cfs @ 15.93 hrs, Volume= 0.234 af, Atten= 91%, Lag= 227.6 min Discarded = 0.20 cfs @ 15.93 hrs, Volume= 0.234 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Pond 2BR : (2) CB in Swale Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 34.33' @ 15.93 hrs Surf.Area= 3,501 sf Storage= 4,242 cf Plug-Flow detention time= 255.7 min calculated for 0.234 af (100% of inflow) Center-of-Mass det. time= 255.7 min ( 1,165.8 - 910.1 ) Volume Invert Avail.Storage Storage Description #1 33.00' 10,776 cf Dry Water Quality Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 33.00 2,890 222.0 0 0 2,890 34.00 3,346 234.0 3,115 3,115 3,382 34.50 3,583 241.0 1,732 4,847 3,672 36.00 4,334 259.0 5,929 10,776 4,480 Device Routing Invert Outlet Devices #1 Discarded 33.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 34.50'24.0" x 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Discarded OutFlow Max=0.20 cfs @ 15.93 hrs HW=34.33' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.20 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=33.00' TW=32.00' (Dynamic Tailwater) 2=Orifice/Grate ( Controls 0.00 cfs) Type III 24-hr 10-year Rainfall=4.88"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 41HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 2SW: Dry Water Quality Swale Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)2 1 0 Inflow Area=4.079 ac Peak Elev=34.33' Storage=4,242 cf 2.06 cfs 0.20 cfs 0.20 cfs 0.00 cfs Type III 24-hr 10-year Rainfall=4.88"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 42HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 3P: (2) 10.5' x 6.33' x 3.5' Leaching Facilities (per Dwelling) - Each with (1) Cultec Recharger 330XLHD Unit and stone Inflow Area = 0.030 ac,100.00% Impervious, Inflow Depth = 4.64" for 10-year event Inflow = 0.14 cfs @ 12.08 hrs, Volume= 0.011 af Outflow = 0.03 cfs @ 11.79 hrs, Volume= 0.011 af, Atten= 82%, Lag= 0.0 min Discarded = 0.03 cfs @ 11.79 hrs, Volume= 0.011 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 51.27' @ 12.53 hrs Surf.Area= 133 sf Storage= 120 cf Plug-Flow detention time= 24.1 min calculated for 0.011 af (100% of inflow) Center-of-Mass det. time= 24.1 min ( 772.5 - 748.4 ) Volume Invert Avail.Storage Storage Description #1 50.00' 127 cf Cultec R-330XLHD x 2 Inside #2 Effective Size= 47.8"W x 30.0"H => 7.45 sf x 7.00'L = 52.2 cf Overall Size= 52.0"W x 30.5"H x 8.50'L with 1.50' Overlap Row Length Adjustment= +1.50' x 7.45 sf x 2 rows #2 50.00' 155 cf 6.33'W x 10.50'L x 3.54'H Prismatoid x 2 471 cf Overall - 127 cf Embedded = 344 cf x 45.0% Voids 281 cf Total Available Storage Device Routing Invert Outlet Devices #1 Discarded 50.00'8.270 in/hr Exfiltration over Horizontal area Phase-In= 0.01' Discarded OutFlow Max=0.03 cfs @ 11.79 hrs HW=50.05' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.03 cfs) Type III 24-hr 10-year Rainfall=4.88"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 43HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 3P: (2) 10.5' x 6.33' x 3.5' Leaching Facilities (per Dwelling) - Each with (1) Cultec Recharger 330XLHD Unit and stone Inflow Discarded Hydrograph Time (hours) 26242220181614121086420Flow (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 Inflow Area=0.030 ac Peak Elev=51.27' Storage=120 cf 0.14 cfs 0.03 cfs Type III 24-hr 10-year Rainfall=4.88"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 44HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Link TSR: Total Site Runoff - M1 & M2 Facilities Inflow Area = 4.811 ac, 21.00% Impervious, Inflow Depth = 0.00" for 10-year event Inflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Link TSR: Total Site Runoff - M1 & M2 Facilities Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Inflow Area=4.811 ac 0.00 cfs 0.00 cfs Type III 24-hr 25-year Rainfall=5.84"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 45HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Time span=0.00-28.00 hrs, dt=0.03 hrs, 934 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=23,930 sf 26.27% Impervious Runoff Depth=1.35"Subcatchment 1AS: Runoff into Catch Flow Length=160' Tc=6.0 min CN=54 Runoff=0.75 cfs 0.062 af Runoff Area=7,973 sf 0.00% Impervious Runoff Depth=0.40"Subcatchment 1BS: Direct Runoff into Swale Tc=6.0 min CN=39 Runoff=0.03 cfs 0.006 af Runoff Area=124,519 sf 27.01% Impervious Runoff Depth=1.35"Subcatchment 2AS: Runoff into Catch Flow Length=270' Tc=7.4 min CN=54 Runoff=3.69 cfs 0.322 af Runoff Area=53,147 sf 7.69% Impervious Runoff Depth=0.56"Subcatchment 2BS: Direct Runoff into Flow Length=380' Tc=6.3 min CN=42 Runoff=0.32 cfs 0.057 af Runoff Area=1,288 sf 100.00% Impervious Runoff Depth=5.60"Subcatchment 3S: Roof Runoff (per Flow Length=20' Slope=0.4000 '/' Tc=6.0 min CN=98 Runoff=0.17 cfs 0.014 af Peak Elev=51.64' Inflow=0.75 cfs 0.062 afPond 1AR: (2) CB's in Pavement 12.0" Round Culvert x 2.00 n=0.020 L=30.0' S=0.0267 '/' Outflow=0.75 cfs 0.062 af Peak Elev=42.67' Storage=266 cf Inflow=0.37 cfs 0.022 afPond 1BP: (1) 28'x14' Leaching Facility - (2) Discarded=0.08 cfs 0.022 af Primary=0.00 cfs 0.000 af Outflow=0.08 cfs 0.022 af Peak Elev=47.84' Inflow=0.37 cfs 0.022 afPond 1BR: (1) CB in Swale 12.0" Round Culvert n=0.020 L=10.0' S=0.0700 '/' Outflow=0.37 cfs 0.022 af Peak Elev=50.06' Storage=731 cf Inflow=0.75 cfs 0.068 afPond 1SW: Dry Water Quality Swale Discarded=0.04 cfs 0.043 af Primary=0.37 cfs 0.022 af Outflow=0.40 cfs 0.065 af Peak Elev=36.11' Inflow=3.69 cfs 0.322 afPond 2AR: (7) CB's in Pavement 12.0" Round Culvert x 7.00 n=0.020 L=20.0' S=0.0350 '/' Outflow=3.69 cfs 0.322 af Peak Elev=26.65' Storage=604 cf Inflow=0.75 cfs 0.097 afPond 2BP: (1) 70'x28' Leaching Facility - Two Discarded=0.38 cfs 0.097 af Primary=0.00 cfs 0.000 af Outflow=0.38 cfs 0.097 af Peak Elev=32.34' Inflow=0.75 cfs 0.097 afPond 2BR: (2) CB in Swale 12.0" Round Culvert x 2.00 n=0.020 L=25.0' S=0.0200 '/' Outflow=0.75 cfs 0.097 af Peak Elev=34.59' Storage=5,186 cf Inflow=3.97 cfs 0.379 afPond 2SW: Dry Water Quality Swale Discarded=0.20 cfs 0.259 af Primary=0.75 cfs 0.097 af Outflow=0.96 cfs 0.356 af Peak Elev=51.73' Storage=161 cf Inflow=0.17 cfs 0.014 afPond 3P: (2) 10.5' x 6.33' x 3.5' Leaching Outflow=0.03 cfs 0.014 af Inflow=0.00 cfs 0.000 afLink TSR: Total Site Runoff - M1 & M2 Facilities Primary=0.00 cfs 0.000 af Total Runoff Area = 4.841 ac Runoff Volume = 0.461 af Average Runoff Depth = 1.14" 78.52% Pervious = 3.801 ac 21.48% Impervious = 1.040 ac Type III 24-hr 25-year Rainfall=5.84"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 46HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1AS: Runoff into Catch Basins - M1 Runoff = 0.75 cfs @ 12.10 hrs, Volume= 0.062 af, Depth= 1.35" Routed to Pond 1AR : (2) CB's in Pavement Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 25-year Rainfall=5.84" Area (sf) CN Description 6,286 98 Paved parking, HSG A 15,144 39 >75% Grass cover, Good, HSG A 2,500 36 Woods, Fair, HSG A 23,930 54 Weighted Average 17,644 73.73% Pervious Area 6,286 26.27% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.2 50 0.0600 0.16 Sheet Flow, Grass: Dense n= 0.240 P2= 3.36" 0.5 50 0.0600 1.71 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.3 60 0.0300 3.52 Shallow Concentrated Flow, Paved Kv= 20.3 fps 6.0 160 Total Subcatchment 1AS: Runoff into Catch Basins - M1 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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 Type III 24-hr 25-year Rainfall=5.84" Runoff Area=23,930 sf Runoff Volume=0.062 af Runoff Depth=1.35" Flow Length=160' Tc=6.0 min CN=54 0.75 cfs Type III 24-hr 25-year Rainfall=5.84"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 47HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1BS: Direct Runoff into Swale - M1 Runoff = 0.03 cfs @ 12.36 hrs, Volume= 0.006 af, Depth= 0.40" Routed to Pond 1SW : Dry Water Quality Swale Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 25-year Rainfall=5.84" Area (sf) CN Description 7,973 39 >75% Grass cover, Good, HSG A 7,973 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, (minimum) 5.0 0 Total, Increased to minimum Tc = 6.0 min Subcatchment 1BS: Direct Runoff into Swale - M1 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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 Type III 24-hr 25-year Rainfall=5.84" Runoff Area=7,973 sf Runoff Volume=0.006 af Runoff Depth=0.40" Tc=6.0 min CN=39 0.03 cfs Type III 24-hr 25-year Rainfall=5.84"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 48HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2AS: Runoff into Catch Basins - M2 Runoff = 3.69 cfs @ 12.12 hrs, Volume= 0.322 af, Depth= 1.35" Routed to Pond 2AR : (7) CB's in Pavement Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 25-year Rainfall=5.84" Area (sf) CN Description 33,633 98 Paved parking, HSG A 48,641 39 >75% Grass cover, Good, HSG A 42,245 36 Woods, Fair, HSG A 124,519 54 Weighted Average 90,886 72.99% Pervious Area 33,633 27.01% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.5 50 0.0500 0.15 Sheet Flow, Grass: Dense n= 0.240 P2= 3.36" 1.5 90 0.0200 0.99 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.4 130 0.0600 4.97 Shallow Concentrated Flow, Paved Kv= 20.3 fps 7.4 270 Total Subcatchment 2AS: Runoff into Catch Basins - M2 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)4 3 2 1 0 Type III 24-hr 25-year Rainfall=5.84" Runoff Area=124,519 sf Runoff Volume=0.322 af Runoff Depth=1.35" Flow Length=270' Tc=7.4 min CN=54 3.69 cfs Type III 24-hr 25-year Rainfall=5.84"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 49HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2BS: Direct Runoff into Swale - M2 Runoff = 0.32 cfs @ 12.29 hrs, Volume= 0.057 af, Depth= 0.56" Routed to Pond 2SW : Dry Water Quality Swale Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 25-year Rainfall=5.84" Area (sf) CN Description 25,000 36 Woods, Fair, HSG A 24,058 39 >75% Grass cover, Good, HSG A 4,089 98 Paved parking, HSG A 53,147 42 Weighted Average 49,058 92.31% Pervious Area 4,089 7.69% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.5 50 0.1600 0.24 Sheet Flow, Grass: Dense n= 0.240 P2= 3.36" 2.8 330 0.0800 1.98 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 6.3 380 Total Subcatchment 2BS: Direct Runoff into Swale - M2 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Type III 24-hr 25-year Rainfall=5.84" Runoff Area=53,147 sf Runoff Volume=0.057 af Runoff Depth=0.56" Flow Length=380' Tc=6.3 min CN=42 0.32 cfs Type III 24-hr 25-year Rainfall=5.84"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 50HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: Roof Runoff (per Dwelling) Runoff = 0.17 cfs @ 12.08 hrs, Volume= 0.014 af, Depth= 5.60" Routed to Pond 3P : (2) 10.5' x 6.33' x 3.5' Leaching Facilities (per Dwelling) - Each with (1) Cultec Recharger 330XLHD Unit and stone Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 25-year Rainfall=5.84" Area (sf) CN Description 1,288 98 Roofs, HSG A 1,288 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.1 20 0.4000 3.33 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.25" 0.1 20 Total, Increased to minimum Tc = 6.0 min Subcatchment 3S: Roof Runoff (per Dwelling) Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.18 0.17 0.16 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 Type III 24-hr 25-year Rainfall=5.84" Runoff Area=1,288 sf Runoff Volume=0.014 af Runoff Depth=5.60" Flow Length=20' Slope=0.4000 '/' Tc=6.0 min CN=98 0.17 cfs Type III 24-hr 25-year Rainfall=5.84"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 51HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1AR: (2) CB's in Pavement Inflow Area = 0.549 ac, 26.27% Impervious, Inflow Depth = 1.35" for 25-year event Inflow = 0.75 cfs @ 12.10 hrs, Volume= 0.062 af Outflow = 0.75 cfs @ 12.10 hrs, Volume= 0.062 af, Atten= 0%, Lag= 0.0 min Primary = 0.75 cfs @ 12.10 hrs, Volume= 0.062 af Routed to Pond 1SW : Dry Water Quality Swale Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 51.64' @ 12.10 hrs Flood Elev= 53.80' Device Routing Invert Outlet Devices #1 Primary 51.30'12.0" Round Culvert X 2.00 L= 30.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 51.30' / 50.50' S= 0.0267 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.79 sf Primary OutFlow Max=0.73 cfs @ 12.10 hrs HW=51.64' TW=49.30' (Dynamic Tailwater) 1=Culvert (Inlet Controls 0.73 cfs @ 1.56 fps) Pond 1AR: (2) CB's in Pavement Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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=0.549 ac Peak Elev=51.64' 12.0" Round Culvert x 2.00 n=0.020 L=30.0' S=0.0267 '/' 0.75 cfs 0.75 cfs Type III 24-hr 25-year Rainfall=5.84"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 52HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1BP: (1) 28'x14' Leaching Facility - (2) 6'x6' Leach Pits, 14' O.C. with stone around Inflow Area = 0.732 ac, 19.70% Impervious, Inflow Depth = 0.37" for 25-year event Inflow = 0.37 cfs @ 12.37 hrs, Volume= 0.022 af Outflow = 0.08 cfs @ 12.36 hrs, Volume= 0.022 af, Atten= 80%, Lag= 0.0 min Discarded = 0.08 cfs @ 12.36 hrs, Volume= 0.022 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - M1 & M2 Facilities Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 42.67' @ 13.18 hrs Surf.Area= 392 sf Storage= 266 cf Plug-Flow detention time= 37.0 min calculated for 0.022 af (100% of inflow) Center-of-Mass det. time= 37.0 min ( 849.0 - 812.0 ) Volume Invert Avail.Storage Storage Description #1 41.30' 967 cf 14.00'W x 28.00'L x 6.50'H Prismatoid 2,548 cf Overall - 398 cf Embedded = 2,150 cf x 45.0% Voids #2 41.80' 339 cf 6.00'D x 6.00'H Vertical Cone/Cylinder x 2 Inside #1 398 cf Overall - 3.0" Wall Thickness = 339 cf 1,307 cf Total Available Storage Device Routing Invert Outlet Devices #1 Discarded 41.30'8.270 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 47.70'10.0' long (Profile 6) Leaching Overflow Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.08 cfs @ 12.36 hrs HW=41.50' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.08 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=41.30' TW=0.00' (Dynamic Tailwater) 2=Leaching Overflow ( Controls 0.00 cfs) Type III 24-hr 25-year Rainfall=5.84"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 53HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 1BP: (1) 28'x14' Leaching Facility - (2) 6'x6' Leach Pits, 14' O.C. with stone around Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=0.732 ac Peak Elev=42.67' Storage=266 cf 0.37 cfs 0.08 cfs 0.08 cfs 0.00 cfs Type III 24-hr 25-year Rainfall=5.84"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 54HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1BR: (1) CB in Swale Inflow Area = 0.732 ac, 19.70% Impervious, Inflow Depth = 0.37" for 25-year event Inflow = 0.37 cfs @ 12.37 hrs, Volume= 0.022 af Outflow = 0.37 cfs @ 12.37 hrs, Volume= 0.022 af, Atten= 0%, Lag= 0.0 min Primary = 0.37 cfs @ 12.37 hrs, Volume= 0.022 af Routed to Pond 1BP : (1) 28'x14' Leaching Facility - (2) 6'x6' Leach Pits, 14' O.C. with stone around Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 47.84' @ 12.36 hrs Flood Elev= 50.00' Device Routing Invert Outlet Devices #1 Primary 47.50'12.0" Round Culvert L= 10.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 47.50' / 46.80' S= 0.0700 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.79 sf Primary OutFlow Max=0.36 cfs @ 12.37 hrs HW=47.83' TW=41.58' (Dynamic Tailwater) 1=Culvert (Inlet Controls 0.36 cfs @ 1.55 fps) Pond 1BR: (1) CB in Swale Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=0.732 ac Peak Elev=47.84' 12.0" Round Culvert n=0.020 L=10.0' S=0.0700 '/' 0.37 cfs 0.37 cfs Type III 24-hr 25-year Rainfall=5.84"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 55HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1SW: Dry Water Quality Swale Inflow Area = 0.732 ac, 19.70% Impervious, Inflow Depth = 1.11" for 25-year event Inflow = 0.75 cfs @ 12.10 hrs, Volume= 0.068 af Outflow = 0.40 cfs @ 12.37 hrs, Volume= 0.065 af, Atten= 46%, Lag= 16.1 min Discarded = 0.04 cfs @ 12.37 hrs, Volume= 0.043 af Primary = 0.37 cfs @ 12.37 hrs, Volume= 0.022 af Routed to Pond 1BR : (1) CB in Swale Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 50.06' @ 12.37 hrs Surf.Area= 637 sf Storage= 731 cf Plug-Flow detention time= 178.2 min calculated for 0.065 af (96% of inflow) Center-of-Mass det. time= 155.0 min ( 1,044.9 - 889.9 ) Volume Invert Avail.Storage Storage Description #1 48.50' 2,417 cf Dry Water Quality Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 48.50 319 92.0 0 0 319 50.00 624 111.0 695 695 662 50.50 738 117.0 340 1,035 784 52.00 1,118 136.0 1,382 2,417 1,212 Device Routing Invert Outlet Devices #1 Discarded 48.50'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 50.00'24.0" x 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Discarded OutFlow Max=0.04 cfs @ 12.37 hrs HW=50.06' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.04 cfs) Primary OutFlow Max=0.36 cfs @ 12.37 hrs HW=50.06' TW=47.83' (Dynamic Tailwater) 2=Orifice/Grate (Weir Controls 0.36 cfs @ 0.78 fps) Type III 24-hr 25-year Rainfall=5.84"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 56HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 1SW: Dry Water Quality Swale Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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=0.732 ac Peak Elev=50.06' Storage=731 cf 0.75 cfs 0.40 cfs 0.04 cfs 0.37 cfs Type III 24-hr 25-year Rainfall=5.84"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 57HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2AR: (7) CB's in Pavement Inflow Area = 2.859 ac, 27.01% Impervious, Inflow Depth = 1.35" for 25-year event Inflow = 3.69 cfs @ 12.12 hrs, Volume= 0.322 af Outflow = 3.69 cfs @ 12.12 hrs, Volume= 0.322 af, Atten= 0%, Lag= 0.0 min Primary = 3.69 cfs @ 12.12 hrs, Volume= 0.322 af Routed to Pond 2SW : Dry Water Quality Swale Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 36.11' @ 12.12 hrs Flood Elev= 38.20' Device Routing Invert Outlet Devices #1 Primary 35.70'12.0" Round Culvert X 7.00 L= 20.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 35.70' / 35.00' S= 0.0350 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.79 sf Primary OutFlow Max=3.67 cfs @ 12.12 hrs HW=36.11' TW=33.53' (Dynamic Tailwater) 1=Culvert (Inlet Controls 3.67 cfs @ 1.72 fps) Pond 2AR: (7) CB's in Pavement Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)4 3 2 1 0 Inflow Area=2.859 ac Peak Elev=36.11' 12.0" Round Culvert x 7.00 n=0.020 L=20.0' S=0.0350 '/' 3.69 cfs 3.69 cfs Type III 24-hr 25-year Rainfall=5.84"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 58HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2BP: (1) 70'x28' Leaching Facility - Two Rows of (5) 6'x6' Leach Pits, 14' O.C. with stone around Inflow Area = 4.079 ac, 21.23% Impervious, Inflow Depth = 0.28" for 25-year event Inflow = 0.75 cfs @ 12.66 hrs, Volume= 0.097 af Outflow = 0.38 cfs @ 12.63 hrs, Volume= 0.097 af, Atten= 50%, Lag= 0.0 min Discarded = 0.38 cfs @ 12.63 hrs, Volume= 0.097 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - M1 & M2 Facilities Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 26.65' @ 13.54 hrs Surf.Area= 1,960 sf Storage= 604 cf Plug-Flow detention time= 14.6 min calculated for 0.097 af (100% of inflow) Center-of-Mass det. time= 14.6 min ( 850.6 - 836.0 ) Volume Invert Avail.Storage Storage Description #1 26.00' 4,120 cf 28.00'W x 70.00'L x 6.50'H Prismatoid 12,740 cf Overall - 3,584 cf Embedded = 9,156 cf x 45.0% Voids #2 26.50' 3,054 cf 6.00'D x 6.00'H Vertical Cone/Cylinder x 18 Inside #1 3,584 cf Overall - 3.0" Wall Thickness = 3,054 cf 7,174 cf Total Available Storage Device Routing Invert Outlet Devices #1 Discarded 26.00'8.270 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 32.40'10.0' long (Profile 6) Leaching Overflow Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.38 cfs @ 12.63 hrs HW=26.10' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.38 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=26.00' TW=0.00' (Dynamic Tailwater) 2=Leaching Overflow ( Controls 0.00 cfs) Type III 24-hr 25-year Rainfall=5.84"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 59HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 2BP: (1) 70'x28' Leaching Facility - Two Rows of (5) 6'x6' Leach Pits, 14' O.C. with stone around Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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=4.079 ac Peak Elev=26.65' Storage=604 cf 0.75 cfs 0.38 cfs 0.38 cfs 0.00 cfs Type III 24-hr 25-year Rainfall=5.84"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 60HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2BR: (2) CB in Swale Inflow Area = 4.079 ac, 21.23% Impervious, Inflow Depth = 0.28" for 25-year event Inflow = 0.75 cfs @ 12.66 hrs, Volume= 0.097 af Outflow = 0.75 cfs @ 12.66 hrs, Volume= 0.097 af, Atten= 0%, Lag= 0.0 min Primary = 0.75 cfs @ 12.66 hrs, Volume= 0.097 af Routed to Pond 2BP : (1) 70'x28' Leaching Facility - Two Rows of (5) 6'x6' Leach Pits, 14' O.C. with stone around Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 32.34' @ 12.66 hrs Flood Elev= 34.50' Device Routing Invert Outlet Devices #1 Primary 32.00'12.0" Round Culvert X 2.00 L= 25.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 32.00' / 31.50' S= 0.0200 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.79 sf Primary OutFlow Max=0.75 cfs @ 12.66 hrs HW=32.34' TW=26.15' (Dynamic Tailwater) 1=Culvert (Inlet Controls 0.75 cfs @ 1.58 fps) Pond 2BR: (2) CB in Swale Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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=4.079 ac Peak Elev=32.34' 12.0" Round Culvert x 2.00 n=0.020 L=25.0' S=0.0200 '/' 0.75 cfs 0.75 cfs Type III 24-hr 25-year Rainfall=5.84"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 61HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2SW: Dry Water Quality Swale Inflow Area = 4.079 ac, 21.23% Impervious, Inflow Depth = 1.12" for 25-year event Inflow = 3.97 cfs @ 12.13 hrs, Volume= 0.379 af Outflow = 0.96 cfs @ 12.66 hrs, Volume= 0.356 af, Atten= 76%, Lag= 32.0 min Discarded = 0.20 cfs @ 12.66 hrs, Volume= 0.259 af Primary = 0.75 cfs @ 12.66 hrs, Volume= 0.097 af Routed to Pond 2BR : (2) CB in Swale Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 34.59' @ 12.66 hrs Surf.Area= 3,628 sf Storage= 5,186 cf Plug-Flow detention time= 226.6 min calculated for 0.356 af (94% of inflow) Center-of-Mass det. time= 196.1 min ( 1,088.4 - 892.3 ) Volume Invert Avail.Storage Storage Description #1 33.00' 10,776 cf Dry Water Quality Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 33.00 2,890 222.0 0 0 2,890 34.00 3,346 234.0 3,115 3,115 3,382 34.50 3,583 241.0 1,732 4,847 3,672 36.00 4,334 259.0 5,929 10,776 4,480 Device Routing Invert Outlet Devices #1 Discarded 33.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 34.50'24.0" x 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Discarded OutFlow Max=0.20 cfs @ 12.66 hrs HW=34.59' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.20 cfs) Primary OutFlow Max=0.75 cfs @ 12.66 hrs HW=34.59' TW=32.34' (Dynamic Tailwater) 2=Orifice/Grate (Weir Controls 0.75 cfs @ 1.00 fps) Type III 24-hr 25-year Rainfall=5.84"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 62HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 2SW: Dry Water Quality Swale Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)4 3 2 1 0 Inflow Area=4.079 ac Peak Elev=34.59' Storage=5,186 cf 3.97 cfs 0.96 cfs 0.20 cfs 0.75 cfs Type III 24-hr 25-year Rainfall=5.84"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 63HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 3P: (2) 10.5' x 6.33' x 3.5' Leaching Facilities (per Dwelling) - Each with (1) Cultec Recharger 330XLHD Unit and stone Inflow Area = 0.030 ac,100.00% Impervious, Inflow Depth = 5.60" for 25-year event Inflow = 0.17 cfs @ 12.08 hrs, Volume= 0.014 af Outflow = 0.03 cfs @ 11.73 hrs, Volume= 0.014 af, Atten= 85%, Lag= 0.0 min Discarded = 0.03 cfs @ 11.73 hrs, Volume= 0.014 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 51.73' @ 12.57 hrs Surf.Area= 133 sf Storage= 161 cf Plug-Flow detention time= 34.6 min calculated for 0.014 af (100% of inflow) Center-of-Mass det. time= 34.6 min ( 780.1 - 745.6 ) Volume Invert Avail.Storage Storage Description #1 50.00' 127 cf Cultec R-330XLHD x 2 Inside #2 Effective Size= 47.8"W x 30.0"H => 7.45 sf x 7.00'L = 52.2 cf Overall Size= 52.0"W x 30.5"H x 8.50'L with 1.50' Overlap Row Length Adjustment= +1.50' x 7.45 sf x 2 rows #2 50.00' 155 cf 6.33'W x 10.50'L x 3.54'H Prismatoid x 2 471 cf Overall - 127 cf Embedded = 344 cf x 45.0% Voids 281 cf Total Available Storage Device Routing Invert Outlet Devices #1 Discarded 50.00'8.270 in/hr Exfiltration over Horizontal area Phase-In= 0.01' Discarded OutFlow Max=0.03 cfs @ 11.73 hrs HW=50.04' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.03 cfs) Type III 24-hr 25-year Rainfall=5.84"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 64HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 3P: (2) 10.5' x 6.33' x 3.5' Leaching Facilities (per Dwelling) - Each with (1) Cultec Recharger 330XLHD Unit and stone Inflow Discarded Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.18 0.17 0.16 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 Inflow Area=0.030 ac Peak Elev=51.73' Storage=161 cf 0.17 cfs 0.03 cfs Type III 24-hr 25-year Rainfall=5.84"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 65HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Link TSR: Total Site Runoff - M1 & M2 Facilities Inflow Area = 4.811 ac, 21.00% Impervious, Inflow Depth = 0.00" for 25-year event Inflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Link TSR: Total Site Runoff - M1 & M2 Facilities Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Inflow Area=4.811 ac 0.00 cfs 0.00 cfs Type III 24-hr 100-year Rainfall=7.31"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 66HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Time span=0.00-28.00 hrs, dt=0.03 hrs, 934 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=23,930 sf 26.27% Impervious Runoff Depth=2.23"Subcatchment 1AS: Runoff into Catch Flow Length=160' Tc=6.0 min CN=54 Runoff=1.33 cfs 0.102 af Runoff Area=7,973 sf 0.00% Impervious Runoff Depth=0.88"Subcatchment 1BS: Direct Runoff into Swale Tc=6.0 min CN=39 Runoff=0.10 cfs 0.013 af Runoff Area=124,519 sf 27.01% Impervious Runoff Depth=2.23"Subcatchment 2AS: Runoff into Catch Flow Length=270' Tc=7.4 min CN=54 Runoff=6.59 cfs 0.530 af Runoff Area=53,147 sf 7.69% Impervious Runoff Depth=1.13"Subcatchment 2BS: Direct Runoff into Flow Length=380' Tc=6.3 min CN=42 Runoff=1.09 cfs 0.115 af Runoff Area=1,288 sf 100.00% Impervious Runoff Depth=7.07"Subcatchment 3S: Roof Runoff (per Flow Length=20' Slope=0.4000 '/' Tc=6.0 min CN=98 Runoff=0.21 cfs 0.017 af Peak Elev=51.77' Inflow=1.33 cfs 0.102 afPond 1AR: (2) CB's in Pavement 12.0" Round Culvert x 2.00 n=0.020 L=30.0' S=0.0267 '/' Outflow=1.33 cfs 0.102 af Peak Elev=47.72' Storage=1,291 cf Inflow=1.29 cfs 0.064 afPond 1BP: (1) 28'x14' Leaching Facility - (2) Discarded=0.08 cfs 0.058 af Primary=0.12 cfs 0.006 af Outflow=0.20 cfs 0.064 af Peak Elev=48.19' Inflow=1.29 cfs 0.064 afPond 1BR: (1) CB in Swale 12.0" Round Culvert n=0.020 L=10.0' S=0.0700 '/' Outflow=1.29 cfs 0.064 af Peak Elev=50.13' Storage=780 cf Inflow=1.43 cfs 0.115 afPond 1SW: Dry Water Quality Swale Discarded=0.04 cfs 0.046 af Primary=1.29 cfs 0.064 af Outflow=1.32 cfs 0.110 af Peak Elev=36.27' Inflow=6.59 cfs 0.530 afPond 2AR: (7) CB's in Pavement 12.0" Round Culvert x 7.00 n=0.020 L=20.0' S=0.0350 '/' Outflow=6.59 cfs 0.530 af Peak Elev=32.44' Storage=7,108 cf Inflow=4.43 cfs 0.329 afPond 2BP: (1) 70'x28' Leaching Facility - Two Discarded=0.38 cfs 0.313 af Primary=0.26 cfs 0.016 af Outflow=0.64 cfs 0.329 af Peak Elev=33.05' Inflow=4.43 cfs 0.329 afPond 2BR: (2) CB in Swale 12.0" Round Culvert x 2.00 n=0.020 L=25.0' S=0.0200 '/' Outflow=4.43 cfs 0.329 af Peak Elev=34.81' Storage=5,966 cf Inflow=7.68 cfs 0.645 afPond 2SW: Dry Water Quality Swale Discarded=0.21 cfs 0.271 af Primary=4.43 cfs 0.329 af Outflow=4.64 cfs 0.600 af Peak Elev=52.60' Storage=225 cf Inflow=0.21 cfs 0.017 afPond 3P: (2) 10.5' x 6.33' x 3.5' Leaching Outflow=0.03 cfs 0.017 af Inflow=0.30 cfs 0.021 afLink TSR: Total Site Runoff - M1 & M2 Facilities Primary=0.30 cfs 0.021 af Total Runoff Area = 4.841 ac Runoff Volume = 0.777 af Average Runoff Depth = 1.93" 78.52% Pervious = 3.801 ac 21.48% Impervious = 1.040 ac Type III 24-hr 100-year Rainfall=7.31"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 67HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1AS: Runoff into Catch Basins - M1 Runoff = 1.33 cfs @ 12.10 hrs, Volume= 0.102 af, Depth= 2.23" Routed to Pond 1AR : (2) CB's in Pavement Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 100-year Rainfall=7.31" Area (sf) CN Description 6,286 98 Paved parking, HSG A 15,144 39 >75% Grass cover, Good, HSG A 2,500 36 Woods, Fair, HSG A 23,930 54 Weighted Average 17,644 73.73% Pervious Area 6,286 26.27% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.2 50 0.0600 0.16 Sheet Flow, Grass: Dense n= 0.240 P2= 3.36" 0.5 50 0.0600 1.71 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.3 60 0.0300 3.52 Shallow Concentrated Flow, Paved Kv= 20.3 fps 6.0 160 Total Subcatchment 1AS: Runoff into Catch Basins - M1 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Type III 24-hr 100-year Rainfall=7.31" Runoff Area=23,930 sf Runoff Volume=0.102 af Runoff Depth=2.23" Flow Length=160' Tc=6.0 min CN=54 1.33 cfs Type III 24-hr 100-year Rainfall=7.31"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 68HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1BS: Direct Runoff into Swale - M1 Runoff = 0.10 cfs @ 12.13 hrs, Volume= 0.013 af, Depth= 0.88" Routed to Pond 1SW : Dry Water Quality Swale Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 100-year Rainfall=7.31" Area (sf) CN Description 7,973 39 >75% Grass cover, Good, HSG A 7,973 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, (minimum) 5.0 0 Total, Increased to minimum Tc = 6.0 min Subcatchment 1BS: Direct Runoff into Swale - M1 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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 Type III 24-hr 100-year Rainfall=7.31" Runoff Area=7,973 sf Runoff Volume=0.013 af Runoff Depth=0.88" Tc=6.0 min CN=39 0.10 cfs Type III 24-hr 100-year Rainfall=7.31"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 69HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2AS: Runoff into Catch Basins - M2 Runoff = 6.59 cfs @ 12.12 hrs, Volume= 0.530 af, Depth= 2.23" Routed to Pond 2AR : (7) CB's in Pavement Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 100-year Rainfall=7.31" Area (sf) CN Description 33,633 98 Paved parking, HSG A 48,641 39 >75% Grass cover, Good, HSG A 42,245 36 Woods, Fair, HSG A 124,519 54 Weighted Average 90,886 72.99% Pervious Area 33,633 27.01% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.5 50 0.0500 0.15 Sheet Flow, Grass: Dense n= 0.240 P2= 3.36" 1.5 90 0.0200 0.99 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.4 130 0.0600 4.97 Shallow Concentrated Flow, Paved Kv= 20.3 fps 7.4 270 Total Subcatchment 2AS: Runoff into Catch Basins - M2 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)7 6 5 4 3 2 1 0 Type III 24-hr 100-year Rainfall=7.31" Runoff Area=124,519 sf Runoff Volume=0.530 af Runoff Depth=2.23" Flow Length=270' Tc=7.4 min CN=54 6.59 cfs Type III 24-hr 100-year Rainfall=7.31"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 70HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2BS: Direct Runoff into Swale - M2 Runoff = 1.09 cfs @ 12.12 hrs, Volume= 0.115 af, Depth= 1.13" Routed to Pond 2SW : Dry Water Quality Swale Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 100-year Rainfall=7.31" Area (sf) CN Description 25,000 36 Woods, Fair, HSG A 24,058 39 >75% Grass cover, Good, HSG A 4,089 98 Paved parking, HSG A 53,147 42 Weighted Average 49,058 92.31% Pervious Area 4,089 7.69% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.5 50 0.1600 0.24 Sheet Flow, Grass: Dense n= 0.240 P2= 3.36" 2.8 330 0.0800 1.98 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 6.3 380 Total Subcatchment 2BS: Direct Runoff into Swale - M2 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Type III 24-hr 100-year Rainfall=7.31" Runoff Area=53,147 sf Runoff Volume=0.115 af Runoff Depth=1.13" Flow Length=380' Tc=6.3 min CN=42 1.09 cfs Type III 24-hr 100-year Rainfall=7.31"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 71HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: Roof Runoff (per Dwelling) Runoff = 0.21 cfs @ 12.08 hrs, Volume= 0.017 af, Depth= 7.07" Routed to Pond 3P : (2) 10.5' x 6.33' x 3.5' Leaching Facilities (per Dwelling) - Each with (1) Cultec Recharger 330XLHD Unit and stone Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 100-year Rainfall=7.31" Area (sf) CN Description 1,288 98 Roofs, HSG A 1,288 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.1 20 0.4000 3.33 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.25" 0.1 20 Total, Increased to minimum Tc = 6.0 min Subcatchment 3S: Roof Runoff (per Dwelling) Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.23 0.22 0.21 0.2 0.19 0.18 0.17 0.16 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 Type III 24-hr 100-year Rainfall=7.31" Runoff Area=1,288 sf Runoff Volume=0.017 af Runoff Depth=7.07" Flow Length=20' Slope=0.4000 '/' Tc=6.0 min CN=98 0.21 cfs Type III 24-hr 100-year Rainfall=7.31"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 72HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1AR: (2) CB's in Pavement Inflow Area = 0.549 ac, 26.27% Impervious, Inflow Depth = 2.23" for 100-year event Inflow = 1.33 cfs @ 12.10 hrs, Volume= 0.102 af Outflow = 1.33 cfs @ 12.10 hrs, Volume= 0.102 af, Atten= 0%, Lag= 0.0 min Primary = 1.33 cfs @ 12.10 hrs, Volume= 0.102 af Routed to Pond 1SW : Dry Water Quality Swale Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 51.77' @ 12.10 hrs Flood Elev= 53.80' Device Routing Invert Outlet Devices #1 Primary 51.30'12.0" Round Culvert X 2.00 L= 30.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 51.30' / 50.50' S= 0.0267 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.79 sf Primary OutFlow Max=1.32 cfs @ 12.10 hrs HW=51.77' TW=50.01' (Dynamic Tailwater) 1=Culvert (Inlet Controls 1.32 cfs @ 1.84 fps) Pond 1AR: (2) CB's in Pavement Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Inflow Area=0.549 ac Peak Elev=51.77' 12.0" Round Culvert x 2.00 n=0.020 L=30.0' S=0.0267 '/' 1.33 cfs 1.33 cfs Type III 24-hr 100-year Rainfall=7.31"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 73HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1BP: (1) 28'x14' Leaching Facility - (2) 6'x6' Leach Pits, 14' O.C. with stone around Inflow Area = 0.732 ac, 19.70% Impervious, Inflow Depth = 1.05" for 100-year event Inflow = 1.29 cfs @ 12.15 hrs, Volume= 0.064 af Outflow = 0.20 cfs @ 12.97 hrs, Volume= 0.064 af, Atten= 85%, Lag= 49.1 min Discarded = 0.08 cfs @ 12.12 hrs, Volume= 0.058 af Primary = 0.12 cfs @ 12.97 hrs, Volume= 0.006 af Routed to Link TSR : Total Site Runoff - M1 & M2 Facilities Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 47.72' @ 12.96 hrs Surf.Area= 392 sf Storage= 1,291 cf Plug-Flow detention time= 180.8 min calculated for 0.064 af (100% of inflow) Center-of-Mass det. time= 180.7 min ( 991.6 - 810.9 ) Volume Invert Avail.Storage Storage Description #1 41.30' 967 cf 14.00'W x 28.00'L x 6.50'H Prismatoid 2,548 cf Overall - 398 cf Embedded = 2,150 cf x 45.0% Voids #2 41.80' 339 cf 6.00'D x 6.00'H Vertical Cone/Cylinder x 2 Inside #1 398 cf Overall - 3.0" Wall Thickness = 339 cf 1,307 cf Total Available Storage Device Routing Invert Outlet Devices #1 Discarded 41.30'8.270 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 47.70'10.0' long (Profile 6) Leaching Overflow Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.08 cfs @ 12.12 hrs HW=41.60' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.08 cfs) Primary OutFlow Max=0.11 cfs @ 12.97 hrs HW=47.72' TW=0.00' (Dynamic Tailwater) 2=Leaching Overflow (Weir Controls 0.11 cfs @ 0.47 fps) Type III 24-hr 100-year Rainfall=7.31"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 74HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 1BP: (1) 28'x14' Leaching Facility - (2) 6'x6' Leach Pits, 14' O.C. with stone around Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Inflow Area=0.732 ac Peak Elev=47.72' Storage=1,291 cf 1.29 cfs 0.20 cfs 0.08 cfs0.12 cfs Type III 24-hr 100-year Rainfall=7.31"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 75HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1BR: (1) CB in Swale Inflow Area = 0.732 ac, 19.70% Impervious, Inflow Depth = 1.05" for 100-year event Inflow = 1.29 cfs @ 12.15 hrs, Volume= 0.064 af Outflow = 1.29 cfs @ 12.15 hrs, Volume= 0.064 af, Atten= 0%, Lag= 0.0 min Primary = 1.29 cfs @ 12.15 hrs, Volume= 0.064 af Routed to Pond 1BP : (1) 28'x14' Leaching Facility - (2) 6'x6' Leach Pits, 14' O.C. with stone around Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 48.19' @ 12.15 hrs Flood Elev= 50.00' Device Routing Invert Outlet Devices #1 Primary 47.50'12.0" Round Culvert L= 10.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 47.50' / 46.80' S= 0.0700 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.79 sf Primary OutFlow Max=1.28 cfs @ 12.15 hrs HW=48.18' TW=42.24' (Dynamic Tailwater) 1=Culvert (Inlet Controls 1.28 cfs @ 2.22 fps) Pond 1BR: (1) CB in Swale Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Inflow Area=0.732 ac Peak Elev=48.19' 12.0" Round Culvert n=0.020 L=10.0' S=0.0700 '/' 1.29 cfs 1.29 cfs Type III 24-hr 100-year Rainfall=7.31"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 76HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1SW: Dry Water Quality Swale Inflow Area = 0.732 ac, 19.70% Impervious, Inflow Depth = 1.89" for 100-year event Inflow = 1.43 cfs @ 12.10 hrs, Volume= 0.115 af Outflow = 1.32 cfs @ 12.15 hrs, Volume= 0.110 af, Atten= 7%, Lag= 3.1 min Discarded = 0.04 cfs @ 12.15 hrs, Volume= 0.046 af Primary = 1.29 cfs @ 12.15 hrs, Volume= 0.064 af Routed to Pond 1BR : (1) CB in Swale Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 50.13' @ 12.15 hrs Surf.Area= 654 sf Storage= 780 cf Plug-Flow detention time= 112.6 min calculated for 0.110 af (95% of inflow) Center-of-Mass det. time= 86.7 min ( 959.4 - 872.7 ) Volume Invert Avail.Storage Storage Description #1 48.50' 2,417 cf Dry Water Quality Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 48.50 319 92.0 0 0 319 50.00 624 111.0 695 695 662 50.50 738 117.0 340 1,035 784 52.00 1,118 136.0 1,382 2,417 1,212 Device Routing Invert Outlet Devices #1 Discarded 48.50'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 50.00'24.0" x 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Discarded OutFlow Max=0.04 cfs @ 12.15 hrs HW=50.13' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.04 cfs) Primary OutFlow Max=1.28 cfs @ 12.15 hrs HW=50.13' TW=48.18' (Dynamic Tailwater) 2=Orifice/Grate (Weir Controls 1.28 cfs @ 1.19 fps) Type III 24-hr 100-year Rainfall=7.31"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 77HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 1SW: Dry Water Quality Swale Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Inflow Area=0.732 ac Peak Elev=50.13' Storage=780 cf 1.43 cfs 1.32 cfs 0.04 cfs 1.29 cfs Type III 24-hr 100-year Rainfall=7.31"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 78HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2AR: (7) CB's in Pavement Inflow Area = 2.859 ac, 27.01% Impervious, Inflow Depth = 2.23" for 100-year event Inflow = 6.59 cfs @ 12.12 hrs, Volume= 0.530 af Outflow = 6.59 cfs @ 12.12 hrs, Volume= 0.530 af, Atten= 0%, Lag= 0.0 min Primary = 6.59 cfs @ 12.12 hrs, Volume= 0.530 af Routed to Pond 2SW : Dry Water Quality Swale Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 36.27' @ 12.12 hrs Flood Elev= 38.20' Device Routing Invert Outlet Devices #1 Primary 35.70'12.0" Round Culvert X 7.00 L= 20.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 35.70' / 35.00' S= 0.0350 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.79 sf Primary OutFlow Max=6.57 cfs @ 12.12 hrs HW=36.27' TW=34.21' (Dynamic Tailwater) 1=Culvert (Inlet Controls 6.57 cfs @ 2.03 fps) Pond 2AR: (7) CB's in Pavement Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)7 6 5 4 3 2 1 0 Inflow Area=2.859 ac Peak Elev=36.27' 12.0" Round Culvert x 7.00 n=0.020 L=20.0' S=0.0350 '/' 6.59 cfs 6.59 cfs Type III 24-hr 100-year Rainfall=7.31"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 79HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2BP: (1) 70'x28' Leaching Facility - Two Rows of (5) 6'x6' Leach Pits, 14' O.C. with stone around Inflow Area = 4.079 ac, 21.23% Impervious, Inflow Depth = 0.97" for 100-year event Inflow = 4.43 cfs @ 12.29 hrs, Volume= 0.329 af Outflow = 0.64 cfs @ 13.81 hrs, Volume= 0.329 af, Atten= 86%, Lag= 91.4 min Discarded = 0.38 cfs @ 12.21 hrs, Volume= 0.313 af Primary = 0.26 cfs @ 13.81 hrs, Volume= 0.016 af Routed to Link TSR : Total Site Runoff - M1 & M2 Facilities Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 32.44' @ 13.81 hrs Surf.Area= 1,960 sf Storage= 7,108 cf Plug-Flow detention time= 202.5 min calculated for 0.328 af (100% of inflow) Center-of-Mass det. time= 202.5 min ( 1,024.1 - 821.6 ) Volume Invert Avail.Storage Storage Description #1 26.00' 4,120 cf 28.00'W x 70.00'L x 6.50'H Prismatoid 12,740 cf Overall - 3,584 cf Embedded = 9,156 cf x 45.0% Voids #2 26.50' 3,054 cf 6.00'D x 6.00'H Vertical Cone/Cylinder x 18 Inside #1 3,584 cf Overall - 3.0" Wall Thickness = 3,054 cf 7,174 cf Total Available Storage Device Routing Invert Outlet Devices #1 Discarded 26.00'8.270 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 32.40'10.0' long (Profile 6) Leaching Overflow Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.38 cfs @ 12.21 hrs HW=26.28' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.38 cfs) Primary OutFlow Max=0.26 cfs @ 13.81 hrs HW=32.44' TW=0.00' (Dynamic Tailwater) 2=Leaching Overflow (Weir Controls 0.26 cfs @ 0.63 fps) Type III 24-hr 100-year Rainfall=7.31"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 80HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 2BP: (1) 70'x28' Leaching Facility - Two Rows of (5) 6'x6' Leach Pits, 14' O.C. with stone around Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)4 3 2 1 0 Inflow Area=4.079 ac Peak Elev=32.44' Storage=7,108 cf 4.43 cfs 0.64 cfs 0.38 cfs 0.26 cfs Type III 24-hr 100-year Rainfall=7.31"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 81HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2BR: (2) CB in Swale Inflow Area = 4.079 ac, 21.23% Impervious, Inflow Depth = 0.97" for 100-year event Inflow = 4.43 cfs @ 12.29 hrs, Volume= 0.329 af Outflow = 4.43 cfs @ 12.29 hrs, Volume= 0.329 af, Atten= 0%, Lag= 0.0 min Primary = 4.43 cfs @ 12.29 hrs, Volume= 0.329 af Routed to Pond 2BP : (1) 70'x28' Leaching Facility - Two Rows of (5) 6'x6' Leach Pits, 14' O.C. with stone around Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 33.05' @ 12.29 hrs Flood Elev= 34.50' Device Routing Invert Outlet Devices #1 Primary 32.00'12.0" Round Culvert X 2.00 L= 25.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 32.00' / 31.50' S= 0.0200 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior, Flow Area= 0.79 sf Primary OutFlow Max=4.41 cfs @ 12.29 hrs HW=33.05' TW=27.26' (Dynamic Tailwater) 1=Culvert (Inlet Controls 4.41 cfs @ 2.81 fps) Pond 2BR: (2) CB in Swale Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)4 3 2 1 0 Inflow Area=4.079 ac Peak Elev=33.05' 12.0" Round Culvert x 2.00 n=0.020 L=25.0' S=0.0200 '/' 4.43 cfs 4.43 cfs Type III 24-hr 100-year Rainfall=7.31"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 82HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2SW: Dry Water Quality Swale Inflow Area = 4.079 ac, 21.23% Impervious, Inflow Depth = 1.90" for 100-year event Inflow = 7.68 cfs @ 12.12 hrs, Volume= 0.645 af Outflow = 4.64 cfs @ 12.29 hrs, Volume= 0.600 af, Atten= 40%, Lag= 10.3 min Discarded = 0.21 cfs @ 12.29 hrs, Volume= 0.271 af Primary = 4.43 cfs @ 12.29 hrs, Volume= 0.329 af Routed to Pond 2BR : (2) CB in Swale Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 34.81' @ 12.29 hrs Surf.Area= 3,730 sf Storage= 5,966 cf Plug-Flow detention time= 142.0 min calculated for 0.599 af (93% of inflow) Center-of-Mass det. time= 106.8 min ( 981.3 - 874.5 ) Volume Invert Avail.Storage Storage Description #1 33.00' 10,776 cf Dry Water Quality Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 33.00 2,890 222.0 0 0 2,890 34.00 3,346 234.0 3,115 3,115 3,382 34.50 3,583 241.0 1,732 4,847 3,672 36.00 4,334 259.0 5,929 10,776 4,480 Device Routing Invert Outlet Devices #1 Discarded 33.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 34.50'24.0" x 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Discarded OutFlow Max=0.21 cfs @ 12.29 hrs HW=34.81' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.21 cfs) Primary OutFlow Max=4.41 cfs @ 12.29 hrs HW=34.81' TW=33.05' (Dynamic Tailwater) 2=Orifice/Grate (Weir Controls 4.41 cfs @ 1.81 fps) Type III 24-hr 100-year Rainfall=7.31"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 83HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 2SW: Dry Water Quality Swale Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)8 7 6 5 4 3 2 1 0 Inflow Area=4.079 ac Peak Elev=34.81' Storage=5,966 cf 7.68 cfs 4.64 cfs 0.21 cfs 4.43 cfs Type III 24-hr 100-year Rainfall=7.31"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 84HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond 3P: (2) 10.5' x 6.33' x 3.5' Leaching Facilities (per Dwelling) - Each with (1) Cultec Recharger 330XLHD Unit and stone Inflow Area = 0.030 ac,100.00% Impervious, Inflow Depth = 7.07" for 100-year event Inflow = 0.21 cfs @ 12.08 hrs, Volume= 0.017 af Outflow = 0.03 cfs @ 11.67 hrs, Volume= 0.017 af, Atten= 88%, Lag= 0.0 min Discarded = 0.03 cfs @ 11.67 hrs, Volume= 0.017 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 52.60' @ 12.65 hrs Surf.Area= 133 sf Storage= 225 cf Plug-Flow detention time= 52.9 min calculated for 0.017 af (100% of inflow) Center-of-Mass det. time= 52.8 min ( 795.2 - 742.4 ) Volume Invert Avail.Storage Storage Description #1 50.00' 127 cf Cultec R-330XLHD x 2 Inside #2 Effective Size= 47.8"W x 30.0"H => 7.45 sf x 7.00'L = 52.2 cf Overall Size= 52.0"W x 30.5"H x 8.50'L with 1.50' Overlap Row Length Adjustment= +1.50' x 7.45 sf x 2 rows #2 50.00' 155 cf 6.33'W x 10.50'L x 3.54'H Prismatoid x 2 471 cf Overall - 127 cf Embedded = 344 cf x 45.0% Voids 281 cf Total Available Storage Device Routing Invert Outlet Devices #1 Discarded 50.00'8.270 in/hr Exfiltration over Horizontal area Phase-In= 0.01' Discarded OutFlow Max=0.03 cfs @ 11.67 hrs HW=50.04' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.03 cfs) Type III 24-hr 100-year Rainfall=7.31"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 85HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond 3P: (2) 10.5' x 6.33' x 3.5' Leaching Facilities (per Dwelling) - Each with (1) Cultec Recharger 330XLHD Unit and stone Inflow Discarded Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.23 0.22 0.21 0.2 0.19 0.18 0.17 0.16 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 Inflow Area=0.030 ac Peak Elev=52.60' Storage=225 cf 0.21 cfs 0.03 cfs Type III 24-hr 100-year Rainfall=7.31"8807.M1 M2 M3(5.1.23) Printed 6/6/2023Prepared by J M O'Reilly & Associates Inc Page 86HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Link TSR: Total Site Runoff - M1 & M2 Facilities Inflow Area = 4.811 ac, 21.00% Impervious, Inflow Depth = 0.05" for 100-year event Inflow = 0.30 cfs @ 13.81 hrs, Volume= 0.021 af Primary = 0.30 cfs @ 13.81 hrs, Volume= 0.021 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Link TSR: Total Site Runoff - M1 & M2 Facilities Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=4.811 ac 0.30 cfs 0.30 cfs 1S Post-Development Watershed - S1 2S Post-Development Watershed - S2 3S Post-Development Watershed - S3 4S Post-Development Watershed - S4 5S Post-Development Watershed - S5 6S Post-Development Watershed - Non-Recharge Areas - S6 S1 Swale Leaching - S1 S2 Swale Leaching - S2 S3 Swale Leaching - S3 S4 Swale Leaching - S4 S5 Swale Leaching - S5 TSR Total Site Runoff - S1 thru S6 Routing Diagram for 8807.S1 thru S6(5.1.23) Prepared by J M O'Reilly & Associates Inc, Printed 6/5/2023 HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Subcat Reach Pond Link 8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 2HydroCAD® 10.20-2g s/n 08678 © 2022 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 Type III 24-hr Default 24.00 1 3.36 2 2 10-year Type III 24-hr Default 24.00 1 4.88 2 3 25-year Type III 24-hr Default 24.00 1 5.84 2 4 100-year Type III 24-hr Default 24.00 1 7.31 2 Type III 24-hr 2-year Rainfall=3.36"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 3HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Time span=0.00-28.00 hrs, dt=0.03 hrs, 934 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=24,842 sf 24.14% Impervious Runoff Depth=0.24"Subcatchment 1S: Post-Development Flow Length=160' Tc=9.5 min CN=53 Runoff=0.05 cfs 0.011 af Runoff Area=9,726 sf 0.00% Impervious Runoff Depth=0.00"Subcatchment 2S: Post-Development Tc=6.0 min CN=39 Runoff=0.00 cfs 0.000 af Runoff Area=74,637 sf 3.89% Impervious Runoff Depth=0.01"Subcatchment 3S: Post-Development Flow Length=500' Tc=10.4 min CN=40 Runoff=0.00 cfs 0.001 af Runoff Area=2,844 sf 27.81% Impervious Runoff Depth=0.30"Subcatchment 4S: Post-Development Tc=6.0 min CN=55 Runoff=0.01 cfs 0.002 af Runoff Area=21,393 sf 6.35% Impervious Runoff Depth=0.02"Subcatchment 5S: Post-Development Tc=6.0 min CN=42 Runoff=0.00 cfs 0.001 af Runoff Area=160,100 sf 0.38% Impervious Runoff Depth=0.00"Subcatchment 6S: Post-Development Flow Length=550' Tc=12.6 min CN=37 Runoff=0.00 cfs 0.000 af Peak Elev=50.01' Storage=11 cf Inflow=0.05 cfs 0.011 afPond S1: Swale Leaching - S1 Discarded=0.04 cfs 0.011 af Primary=0.00 cfs 0.000 af Outflow=0.04 cfs 0.011 af Peak Elev=38.00' Storage=0 cf Inflow=0.00 cfs 0.000 afPond S2: Swale Leaching - S2 Discarded=0.00 cfs 0.000 af Primary=0.00 cfs 0.000 af Outflow=0.00 cfs 0.000 af Peak Elev=28.00' Storage=0 cf Inflow=0.00 cfs 0.001 afPond S3: Swale Leaching - S3 Discarded=0.00 cfs 0.001 af Primary=0.00 cfs 0.000 af Outflow=0.00 cfs 0.001 af Peak Elev=56.01' Storage=2 cf Inflow=0.01 cfs 0.002 afPond S4: Swale Leaching - S4 Discarded=0.01 cfs 0.002 af Primary=0.00 cfs 0.000 af Outflow=0.01 cfs 0.002 af Peak Elev=48.00' Storage=0 cf Inflow=0.00 cfs 0.001 afPond S5: Swale Leaching - S5 Discarded=0.00 cfs 0.001 af Primary=0.00 cfs 0.000 af Outflow=0.00 cfs 0.001 af Inflow=0.00 cfs 0.000 afLink TSR: Total Site Runoff - S1 thru S6 Primary=0.00 cfs 0.000 af Total Runoff Area = 6.739 ac Runoff Volume = 0.015 af Average Runoff Depth = 0.03" 96.03% Pervious = 6.471 ac 3.97% Impervious = 0.268 ac Type III 24-hr 2-year Rainfall=3.36"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 4HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Post-Development Watershed - S1 Runoff = 0.05 cfs @ 12.41 hrs, Volume= 0.011 af, Depth= 0.24" Routed to Pond S1 : Swale Leaching - S1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 2-year Rainfall=3.36" Area (sf) CN Description 5,997 98 Paved parking, HSG A 18,845 39 >75% Grass cover, Good, HSG A 24,842 53 Weighted Average 18,845 75.86% Pervious Area 5,997 24.14% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 50 0.0200 0.10 Sheet Flow, Grass: Dense n= 0.240 P2= 3.36" 1.5 110 0.0300 1.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 9.5 160 Total Subcatchment 1S: Post-Development Watershed - S1 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Type III 24-hr 2-year Rainfall=3.36" Runoff Area=24,842 sf Runoff Volume=0.011 af Runoff Depth=0.24" Flow Length=160' Tc=9.5 min CN=53 0.05 cfs Type III 24-hr 2-year Rainfall=3.36"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 5HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2S: Post-Development Watershed - S2 Runoff = 0.00 cfs @ 23.83 hrs, Volume= 0.000 af, Depth= 0.00" Routed to Pond S2 : Swale Leaching - S2 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 2-year Rainfall=3.36" Area (sf) CN Description 9,726 39 >75% Grass cover, Good, HSG A 9,726 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, (minimum) 5.0 0 Total, Increased to minimum Tc = 6.0 min Subcatchment 2S: Post-Development Watershed - S2 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 0 0 0 0 0 0 0 0 0 Type III 24-hr 2-year Rainfall=3.36" Runoff Area=9,726 sf Runoff Volume=0.000 af Runoff Depth=0.00" Tc=6.0 min CN=39 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 6HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: Post-Development Watershed - S3 Runoff = 0.00 cfs @ 22.54 hrs, Volume= 0.001 af, Depth= 0.01" Routed to Pond S3 : Swale Leaching - S3 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 2-year Rainfall=3.36" Area (sf) CN Description 2,900 98 Paved parking, HSG A 46,737 39 >75% Grass cover, Good, HSG A 25,000 36 Woods, Fair, HSG A 74,637 40 Weighted Average 71,737 96.11% Pervious Area 2,900 3.89% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.1 50 0.0400 0.14 Sheet Flow, Grass: Dense n= 0.240 P2= 3.36" 3.6 300 0.0400 1.40 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.7 150 0.1000 3.61 45.08 Channel Flow, Area= 12.5 sf Perim= 5.0' r= 2.50' n= 0.240 Sheet flow over Dense Grass 10.4 500 Total Subcatchment 3S: Post-Development Watershed - S3 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.003 0.002 0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0 Type III 24-hr 2-year Rainfall=3.36" Runoff Area=74,637 sf Runoff Volume=0.001 af Runoff Depth=0.01" Flow Length=500' Tc=10.4 min CN=40 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 7HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 4S: Post-Development Watershed - S4 Runoff = 0.01 cfs @ 12.30 hrs, Volume= 0.002 af, Depth= 0.30" Routed to Pond S4 : Swale Leaching - S4 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 2-year Rainfall=3.36" Area (sf) CN Description 791 98 Paved parking, HSG A 2,053 39 >75% Grass cover, Good, HSG A 2,844 55 Weighted Average 2,053 72.19% Pervious Area 791 27.81% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, (minimum) 5.0 0 Total, Increased to minimum Tc = 6.0 min Subcatchment 4S: Post-Development Watershed - S4 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.009 0.009 0.008 0.008 0.007 0.007 0.006 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Type III 24-hr 2-year Rainfall=3.36" Runoff Area=2,844 sf Runoff Volume=0.002 af Runoff Depth=0.30" Tc=6.0 min CN=55 0.01 cfs Type III 24-hr 2-year Rainfall=3.36"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 8HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 5S: Post-Development Watershed - S5 Runoff = 0.00 cfs @ 17.07 hrs, Volume= 0.001 af, Depth= 0.02" Routed to Pond S5 : Swale Leaching - S5 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 2-year Rainfall=3.36" Area (sf) CN Description 1,359 98 Paved parking, HSG A 15,534 39 >75% Grass cover, Good, HSG A 4,500 36 Woods, Fair, HSG A 21,393 42 Weighted Average 20,034 93.65% Pervious Area 1,359 6.35% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, (minimum) 5.0 0 Total, Increased to minimum Tc = 6.0 min Subcatchment 5S: Post-Development Watershed - S5 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0.000 0.000 0 0 Type III 24-hr 2-year Rainfall=3.36" Runoff Area=21,393 sf Runoff Volume=0.001 af Runoff Depth=0.02" Tc=6.0 min CN=42 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 9HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 6S: Post-Development Watershed - Non-Recharge Areas - S6 Runoff = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Depth= 0.00" Routed to Link TSR : Total Site Runoff - S1 thru S6 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 2-year Rainfall=3.36" Area (sf) CN Description 611 98 Paved parking, HSG A 30,000 39 >75% Grass cover, Good, HSG A 129,489 36 Woods, Fair, HSG A 160,100 37 Weighted Average 159,489 99.62% Pervious Area 611 0.38% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.3 50 0.1000 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 6.3 500 0.0700 1.32 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 12.6 550 Total Subcatchment 6S: Post-Development Watershed - Non-Recharge Areas - S6 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Type III 24-hr 2-year Rainfall=3.36" Runoff Area=160,100 sf Runoff Volume=0.000 af Runoff Depth=0.00" Flow Length=550' Tc=12.6 min CN=37 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 10HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond S1: Swale Leaching - S1 Inflow Area = 0.570 ac, 24.14% Impervious, Inflow Depth = 0.24" for 2-year event Inflow = 0.05 cfs @ 12.41 hrs, Volume= 0.011 af Outflow = 0.04 cfs @ 12.53 hrs, Volume= 0.011 af, Atten= 15%, Lag= 7.4 min Discarded = 0.04 cfs @ 12.53 hrs, Volume= 0.011 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - S1 thru S6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 50.01' @ 12.53 hrs Surf.Area= 784 sf Storage= 11 cf Plug-Flow detention time= 3.1 min calculated for 0.011 af (100% of inflow) Center-of-Mass det. time= 3.1 min ( 968.6 - 965.6 ) Volume Invert Avail.Storage Storage Description #1 50.00' 2,293 cf Grassed Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 50.00 779 139.0 0 0 779 52.00 1,559 210.0 2,293 2,293 2,781 Device Routing Invert Outlet Devices #1 Discarded 50.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 51.90'10.0' long (Profile 6) Broad-Crested Rectangular Weir Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.04 cfs @ 12.53 hrs HW=50.01' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.04 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=50.00' TW=0.00' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Type III 24-hr 2-year Rainfall=3.36"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 11HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond S1: Swale Leaching - S1 Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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=0.570 ac Peak Elev=50.01' Storage=11 cf 0.05 cfs 0.04 cfs 0.04 cfs 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 12HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond S2: Swale Leaching - S2 Inflow Area = 0.223 ac, 0.00% Impervious, Inflow Depth = 0.00" for 2-year event Inflow = 0.00 cfs @ 23.83 hrs, Volume= 0.000 af Outflow = 0.00 cfs @ 23.89 hrs, Volume= 0.000 af, Atten= 0%, Lag= 3.9 min Discarded = 0.00 cfs @ 23.89 hrs, Volume= 0.000 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - S1 thru S6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 38.00' @ 23.89 hrs Surf.Area= 638 sf Storage= 0 cf Plug-Flow detention time= 3.0 min calculated for 0.000 af (100% of inflow) Center-of-Mass det. time= 3.0 min ( 1,313.9 - 1,310.9 ) Volume Invert Avail.Storage Storage Description #1 38.00' 856 cf Grassed Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 38.00 638 222.0 0 0 638 39.00 1,095 235.0 856 856 1,163 Device Routing Invert Outlet Devices #1 Discarded 38.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 38.90'10.0' long (Profile 6) Broad-Crested Rectangular Weir Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.00 cfs @ 23.89 hrs HW=38.00' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.00 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=38.00' TW=0.00' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Type III 24-hr 2-year Rainfall=3.36"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 13HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond S2: Swale Leaching - S2 Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 0 0 0 0 0 0 0 0 0 Inflow Area=0.223 ac Peak Elev=38.00' Storage=0 cf 0.00 cfs 0.00 cfs 0.00 cfs 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 14HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond S3: Swale Leaching - S3 Inflow Area = 1.713 ac, 3.89% Impervious, Inflow Depth = 0.01" for 2-year event Inflow = 0.00 cfs @ 22.54 hrs, Volume= 0.001 af Outflow = 0.00 cfs @ 22.57 hrs, Volume= 0.001 af, Atten= 0%, Lag= 1.7 min Discarded = 0.00 cfs @ 22.57 hrs, Volume= 0.001 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - S1 thru S6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 28.00' @ 22.57 hrs Surf.Area= 2,004 sf Storage= 0 cf Plug-Flow detention time= 3.0 min calculated for 0.001 af (100% of inflow) Center-of-Mass det. time= 3.0 min ( 1,258.5 - 1,255.5 ) Volume Invert Avail.Storage Storage Description #1 28.00' 5,894 cf Grassed Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 28.00 2,004 189.0 0 0 2,004 30.00 4,004 312.0 5,894 5,894 6,933 Device Routing Invert Outlet Devices #1 Discarded 28.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 29.90'10.0' long (Profile 6) Broad-Crested Rectangular Weir Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.00 cfs @ 22.57 hrs HW=28.00' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.00 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=28.00' TW=0.00' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Type III 24-hr 2-year Rainfall=3.36"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 15HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond S3: Swale Leaching - S3 Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.003 0.002 0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0 Inflow Area=1.713 ac Peak Elev=28.00' Storage=0 cf 0.00 cfs 0.00 cfs 0.00 cfs 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 16HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond S4: Swale Leaching - S4 Inflow Area = 0.065 ac, 27.81% Impervious, Inflow Depth = 0.30" for 2-year event Inflow = 0.01 cfs @ 12.30 hrs, Volume= 0.002 af Outflow = 0.01 cfs @ 12.35 hrs, Volume= 0.002 af, Atten= 2%, Lag= 3.0 min Discarded = 0.01 cfs @ 12.35 hrs, Volume= 0.002 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - S1 thru S6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 56.01' @ 12.35 hrs Surf.Area= 249 sf Storage= 2 cf Plug-Flow detention time= 3.0 min calculated for 0.002 af (100% of inflow) Center-of-Mass det. time= 3.0 min ( 948.6 - 945.6 ) Volume Invert Avail.Storage Storage Description #1 56.00' 342 cf Grassed Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 56.00 248 92.0 0 0 248 57.00 446 105.0 342 342 474 Device Routing Invert Outlet Devices #1 Discarded 56.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 56.90'10.0' long (Profile 6) Broad-Crested Rectangular Weir Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.01 cfs @ 12.35 hrs HW=56.01' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.01 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=56.00' TW=0.00' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Type III 24-hr 2-year Rainfall=3.36"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 17HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond S4: Swale Leaching - S4 Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.009 0.009 0.008 0.008 0.007 0.007 0.006 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Inflow Area=0.065 ac Peak Elev=56.01' Storage=2 cf 0.01 cfs 0.01 cfs 0.01 cfs 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 18HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond S5: Swale Leaching - S5 Inflow Area = 0.491 ac, 6.35% Impervious, Inflow Depth = 0.02" for 2-year event Inflow = 0.00 cfs @ 17.07 hrs, Volume= 0.001 af Outflow = 0.00 cfs @ 17.11 hrs, Volume= 0.001 af, Atten= 0%, Lag= 2.4 min Discarded = 0.00 cfs @ 17.11 hrs, Volume= 0.001 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - S1 thru S6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 48.00' @ 17.11 hrs Surf.Area= 721 sf Storage= 0 cf Plug-Flow detention time= 3.0 min calculated for 0.001 af (100% of inflow) Center-of-Mass det. time= 3.0 min ( 1,166.0 - 1,163.0 ) Volume Invert Avail.Storage Storage Description #1 48.00' 849 cf Grassed Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 48.00 721 125.0 0 0 721 49.00 983 137.0 849 849 1,003 Device Routing Invert Outlet Devices #1 Discarded 48.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 48.90'10.0' long (Profile 6) Broad-Crested Rectangular Weir Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.00 cfs @ 17.11 hrs HW=48.00' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.00 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=48.00' TW=0.00' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Type III 24-hr 2-year Rainfall=3.36"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 19HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond S5: Swale Leaching - S5 Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0.000 0.000 0 0 Inflow Area=0.491 ac Peak Elev=48.00' Storage=0 cf 0.00 cfs 0.00 cfs 0.00 cfs 0.00 cfs Type III 24-hr 2-year Rainfall=3.36"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 20HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Link TSR: Total Site Runoff - S1 thru S6 Inflow Area = 6.739 ac, 3.97% Impervious, Inflow Depth = 0.00" for 2-year event Inflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Link TSR: Total Site Runoff - S1 thru S6 Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Inflow Area=6.739 ac 0.00 cfs 0.00 cfs Type III 24-hr 10-year Rainfall=4.88"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 21HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Time span=0.00-28.00 hrs, dt=0.03 hrs, 934 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=24,842 sf 24.14% Impervious Runoff Depth=0.81"Subcatchment 1S: Post-Development Flow Length=160' Tc=9.5 min CN=53 Runoff=0.34 cfs 0.038 af Runoff Area=9,726 sf 0.00% Impervious Runoff Depth=0.18"Subcatchment 2S: Post-Development Tc=6.0 min CN=39 Runoff=0.01 cfs 0.003 af Runoff Area=74,637 sf 3.89% Impervious Runoff Depth=0.21"Subcatchment 3S: Post-Development Flow Length=500' Tc=10.4 min CN=40 Runoff=0.07 cfs 0.030 af Runoff Area=2,844 sf 27.81% Impervious Runoff Depth=0.92"Subcatchment 4S: Post-Development Tc=6.0 min CN=55 Runoff=0.05 cfs 0.005 af Runoff Area=21,393 sf 6.35% Impervious Runoff Depth=0.28"Subcatchment 5S: Post-Development Tc=6.0 min CN=42 Runoff=0.04 cfs 0.012 af Runoff Area=160,100 sf 0.38% Impervious Runoff Depth=0.12"Subcatchment 6S: Post-Development Flow Length=550' Tc=12.6 min CN=37 Runoff=0.06 cfs 0.036 af Peak Elev=50.56' Storage=488 cf Inflow=0.34 cfs 0.038 afPond S1: Swale Leaching - S1 Discarded=0.05 cfs 0.038 af Primary=0.00 cfs 0.000 af Outflow=0.05 cfs 0.038 af Peak Elev=38.00' Storage=1 cf Inflow=0.01 cfs 0.003 afPond S2: Swale Leaching - S2 Discarded=0.01 cfs 0.003 af Primary=0.00 cfs 0.000 af Outflow=0.01 cfs 0.003 af Peak Elev=28.01' Storage=12 cf Inflow=0.07 cfs 0.030 afPond S3: Swale Leaching - S3 Discarded=0.07 cfs 0.030 af Primary=0.00 cfs 0.000 af Outflow=0.07 cfs 0.030 af Peak Elev=56.16' Storage=41 cf Inflow=0.05 cfs 0.005 afPond S4: Swale Leaching - S4 Discarded=0.02 cfs 0.005 af Primary=0.00 cfs 0.000 af Outflow=0.02 cfs 0.005 af Peak Elev=48.01' Storage=8 cf Inflow=0.04 cfs 0.012 afPond S5: Swale Leaching - S5 Discarded=0.04 cfs 0.012 af Primary=0.00 cfs 0.000 af Outflow=0.04 cfs 0.012 af Inflow=0.06 cfs 0.036 afLink TSR: Total Site Runoff - S1 thru S6 Primary=0.06 cfs 0.036 af Total Runoff Area = 6.739 ac Runoff Volume = 0.124 af Average Runoff Depth = 0.22" 96.03% Pervious = 6.471 ac 3.97% Impervious = 0.268 ac Type III 24-hr 10-year Rainfall=4.88"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 22HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Post-Development Watershed - S1 Runoff = 0.34 cfs @ 12.17 hrs, Volume= 0.038 af, Depth= 0.81" Routed to Pond S1 : Swale Leaching - S1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 10-year Rainfall=4.88" Area (sf) CN Description 5,997 98 Paved parking, HSG A 18,845 39 >75% Grass cover, Good, HSG A 24,842 53 Weighted Average 18,845 75.86% Pervious Area 5,997 24.14% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 50 0.0200 0.10 Sheet Flow, Grass: Dense n= 0.240 P2= 3.36" 1.5 110 0.0300 1.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 9.5 160 Total Subcatchment 1S: Post-Development Watershed - S1 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Type III 24-hr 10-year Rainfall=4.88" Runoff Area=24,842 sf Runoff Volume=0.038 af Runoff Depth=0.81" Flow Length=160' Tc=9.5 min CN=53 0.34 cfs Type III 24-hr 10-year Rainfall=4.88"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 23HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2S: Post-Development Watershed - S2 Runoff = 0.01 cfs @ 12.50 hrs, Volume= 0.003 af, Depth= 0.18" Routed to Pond S2 : Swale Leaching - S2 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 10-year Rainfall=4.88" Area (sf) CN Description 9,726 39 >75% Grass cover, Good, HSG A 9,726 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, (minimum) 5.0 0 Total, Increased to minimum Tc = 6.0 min Subcatchment 2S: Post-Development Watershed - S2 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.007 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Type III 24-hr 10-year Rainfall=4.88" Runoff Area=9,726 sf Runoff Volume=0.003 af Runoff Depth=0.18" Tc=6.0 min CN=39 0.01 cfs Type III 24-hr 10-year Rainfall=4.88"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 24HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: Post-Development Watershed - S3 Runoff = 0.07 cfs @ 12.53 hrs, Volume= 0.030 af, Depth= 0.21" Routed to Pond S3 : Swale Leaching - S3 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 10-year Rainfall=4.88" Area (sf) CN Description 2,900 98 Paved parking, HSG A 46,737 39 >75% Grass cover, Good, HSG A 25,000 36 Woods, Fair, HSG A 74,637 40 Weighted Average 71,737 96.11% Pervious Area 2,900 3.89% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.1 50 0.0400 0.14 Sheet Flow, Grass: Dense n= 0.240 P2= 3.36" 3.6 300 0.0400 1.40 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.7 150 0.1000 3.61 45.08 Channel Flow, Area= 12.5 sf Perim= 5.0' r= 2.50' n= 0.240 Sheet flow over Dense Grass 10.4 500 Total Subcatchment 3S: Post-Development Watershed - S3 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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 Type III 24-hr 10-year Rainfall=4.88" Runoff Area=74,637 sf Runoff Volume=0.030 af Runoff Depth=0.21" Flow Length=500' Tc=10.4 min CN=40 0.07 cfs Type III 24-hr 10-year Rainfall=4.88"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 25HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 4S: Post-Development Watershed - S4 Runoff = 0.05 cfs @ 12.11 hrs, Volume= 0.005 af, Depth= 0.92" Routed to Pond S4 : Swale Leaching - S4 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 10-year Rainfall=4.88" Area (sf) CN Description 791 98 Paved parking, HSG A 2,053 39 >75% Grass cover, Good, HSG A 2,844 55 Weighted Average 2,053 72.19% Pervious Area 791 27.81% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, (minimum) 5.0 0 Total, Increased to minimum Tc = 6.0 min Subcatchment 4S: Post-Development Watershed - S4 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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 Type III 24-hr 10-year Rainfall=4.88" Runoff Area=2,844 sf Runoff Volume=0.005 af Runoff Depth=0.92" Tc=6.0 min CN=55 0.05 cfs Type III 24-hr 10-year Rainfall=4.88"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 26HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 5S: Post-Development Watershed - S5 Runoff = 0.04 cfs @ 12.40 hrs, Volume= 0.012 af, Depth= 0.28" Routed to Pond S5 : Swale Leaching - S5 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 10-year Rainfall=4.88" Area (sf) CN Description 1,359 98 Paved parking, HSG A 15,534 39 >75% Grass cover, Good, HSG A 4,500 36 Woods, Fair, HSG A 21,393 42 Weighted Average 20,034 93.65% Pervious Area 1,359 6.35% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, (minimum) 5.0 0 Total, Increased to minimum Tc = 6.0 min Subcatchment 5S: Post-Development Watershed - S5 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.048 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 Type III 24-hr 10-year Rainfall=4.88" Runoff Area=21,393 sf Runoff Volume=0.012 af Runoff Depth=0.28" Tc=6.0 min CN=42 0.04 cfs Type III 24-hr 10-year Rainfall=4.88"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 27HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 6S: Post-Development Watershed - Non-Recharge Areas - S6 Runoff = 0.06 cfs @ 14.83 hrs, Volume= 0.036 af, Depth= 0.12" Routed to Link TSR : Total Site Runoff - S1 thru S6 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 10-year Rainfall=4.88" Area (sf) CN Description 611 98 Paved parking, HSG A 30,000 39 >75% Grass cover, Good, HSG A 129,489 36 Woods, Fair, HSG A 160,100 37 Weighted Average 159,489 99.62% Pervious Area 611 0.38% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.3 50 0.1000 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 6.3 500 0.0700 1.32 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 12.6 550 Total Subcatchment 6S: Post-Development Watershed - Non-Recharge Areas - S6 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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 Type III 24-hr 10-year Rainfall=4.88" Runoff Area=160,100 sf Runoff Volume=0.036 af Runoff Depth=0.12" Flow Length=550' Tc=12.6 min CN=37 0.06 cfs Type III 24-hr 10-year Rainfall=4.88"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 28HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond S1: Swale Leaching - S1 Inflow Area = 0.570 ac, 24.14% Impervious, Inflow Depth = 0.81" for 10-year event Inflow = 0.34 cfs @ 12.17 hrs, Volume= 0.038 af Outflow = 0.05 cfs @ 13.88 hrs, Volume= 0.038 af, Atten= 84%, Lag= 102.7 min Discarded = 0.05 cfs @ 13.88 hrs, Volume= 0.038 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - S1 thru S6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 50.56' @ 13.88 hrs Surf.Area= 970 sf Storage= 488 cf Plug-Flow detention time= 91.7 min calculated for 0.038 af (100% of inflow) Center-of-Mass det. time= 91.7 min ( 998.3 - 906.7 ) Volume Invert Avail.Storage Storage Description #1 50.00' 2,293 cf Grassed Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 50.00 779 139.0 0 0 779 52.00 1,559 210.0 2,293 2,293 2,781 Device Routing Invert Outlet Devices #1 Discarded 50.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 51.90'10.0' long (Profile 6) Broad-Crested Rectangular Weir Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.05 cfs @ 13.88 hrs HW=50.56' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.05 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=50.00' TW=0.00' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Type III 24-hr 10-year Rainfall=4.88"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 29HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond S1: Swale Leaching - S1 Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=0.570 ac Peak Elev=50.56' Storage=488 cf 0.34 cfs 0.05 cfs 0.05 cfs 0.00 cfs Type III 24-hr 10-year Rainfall=4.88"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 30HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond S2: Swale Leaching - S2 Inflow Area = 0.223 ac, 0.00% Impervious, Inflow Depth = 0.18" for 10-year event Inflow = 0.01 cfs @ 12.50 hrs, Volume= 0.003 af Outflow = 0.01 cfs @ 13.66 hrs, Volume= 0.003 af, Atten= 4%, Lag= 69.3 min Discarded = 0.01 cfs @ 13.66 hrs, Volume= 0.003 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - S1 thru S6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 38.00' @ 13.66 hrs Surf.Area= 639 sf Storage= 1 cf Plug-Flow detention time= 3.0 min calculated for 0.003 af (100% of inflow) Center-of-Mass det. time= 3.0 min ( 1,022.2 - 1,019.2 ) Volume Invert Avail.Storage Storage Description #1 38.00' 856 cf Grassed Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 38.00 638 222.0 0 0 638 39.00 1,095 235.0 856 856 1,163 Device Routing Invert Outlet Devices #1 Discarded 38.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 38.90'10.0' long (Profile 6) Broad-Crested Rectangular Weir Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.01 cfs @ 13.66 hrs HW=38.00' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.01 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=38.00' TW=0.00' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Type III 24-hr 10-year Rainfall=4.88"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 31HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond S2: Swale Leaching - S2 Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.007 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Inflow Area=0.223 ac Peak Elev=38.00' Storage=1 cf 0.01 cfs 0.01 cfs 0.01 cfs 0.00 cfs Type III 24-hr 10-year Rainfall=4.88"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 32HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond S3: Swale Leaching - S3 Inflow Area = 1.713 ac, 3.89% Impervious, Inflow Depth = 0.21" for 10-year event Inflow = 0.07 cfs @ 12.53 hrs, Volume= 0.030 af Outflow = 0.07 cfs @ 12.58 hrs, Volume= 0.030 af, Atten= 4%, Lag= 3.3 min Discarded = 0.07 cfs @ 12.58 hrs, Volume= 0.030 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - S1 thru S6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 28.01' @ 12.58 hrs Surf.Area= 2,009 sf Storage= 12 cf Plug-Flow detention time= 3.0 min calculated for 0.030 af (100% of inflow) Center-of-Mass det. time= 3.0 min ( 1,011.4 - 1,008.4 ) Volume Invert Avail.Storage Storage Description #1 28.00' 5,894 cf Grassed Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 28.00 2,004 189.0 0 0 2,004 30.00 4,004 312.0 5,894 5,894 6,933 Device Routing Invert Outlet Devices #1 Discarded 28.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 29.90'10.0' long (Profile 6) Broad-Crested Rectangular Weir Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.07 cfs @ 12.58 hrs HW=28.01' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.07 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=28.00' TW=0.00' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Type III 24-hr 10-year Rainfall=4.88"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 33HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond S3: Swale Leaching - S3 Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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=1.713 ac Peak Elev=28.01' Storage=12 cf 0.07 cfs 0.07 cfs 0.07 cfs 0.00 cfs Type III 24-hr 10-year Rainfall=4.88"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 34HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond S4: Swale Leaching - S4 Inflow Area = 0.065 ac, 27.81% Impervious, Inflow Depth = 0.92" for 10-year event Inflow = 0.05 cfs @ 12.11 hrs, Volume= 0.005 af Outflow = 0.02 cfs @ 12.57 hrs, Volume= 0.005 af, Atten= 72%, Lag= 27.4 min Discarded = 0.02 cfs @ 12.57 hrs, Volume= 0.005 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - S1 thru S6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 56.16' @ 12.57 hrs Surf.Area= 275 sf Storage= 41 cf Plug-Flow detention time= 16.7 min calculated for 0.005 af (100% of inflow) Center-of-Mass det. time= 16.7 min ( 911.7 - 895.0 ) Volume Invert Avail.Storage Storage Description #1 56.00' 342 cf Grassed Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 56.00 248 92.0 0 0 248 57.00 446 105.0 342 342 474 Device Routing Invert Outlet Devices #1 Discarded 56.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 56.90'10.0' long (Profile 6) Broad-Crested Rectangular Weir Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.02 cfs @ 12.57 hrs HW=56.16' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.02 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=56.00' TW=0.00' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Type III 24-hr 10-year Rainfall=4.88"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 35HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond S4: Swale Leaching - S4 Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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=0.065 ac Peak Elev=56.16' Storage=41 cf 0.05 cfs 0.02 cfs 0.02 cfs 0.00 cfs Type III 24-hr 10-year Rainfall=4.88"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 36HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond S5: Swale Leaching - S5 Inflow Area = 0.491 ac, 6.35% Impervious, Inflow Depth = 0.28" for 10-year event Inflow = 0.04 cfs @ 12.40 hrs, Volume= 0.012 af Outflow = 0.04 cfs @ 12.47 hrs, Volume= 0.012 af, Atten= 8%, Lag= 4.7 min Discarded = 0.04 cfs @ 12.47 hrs, Volume= 0.012 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - S1 thru S6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 48.01' @ 12.47 hrs Surf.Area= 724 sf Storage= 8 cf Plug-Flow detention time= 3.0 min calculated for 0.012 af (100% of inflow) Center-of-Mass det. time= 3.0 min ( 982.5 - 979.5 ) Volume Invert Avail.Storage Storage Description #1 48.00' 849 cf Grassed Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 48.00 721 125.0 0 0 721 49.00 983 137.0 849 849 1,003 Device Routing Invert Outlet Devices #1 Discarded 48.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 48.90'10.0' long (Profile 6) Broad-Crested Rectangular Weir Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.04 cfs @ 12.47 hrs HW=48.01' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.04 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=48.00' TW=0.00' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Type III 24-hr 10-year Rainfall=4.88"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 37HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond S5: Swale Leaching - S5 Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Inflow Area=0.491 ac Peak Elev=48.01' Storage=8 cf 0.04 cfs 0.04 cfs 0.04 cfs 0.00 cfs Type III 24-hr 10-year Rainfall=4.88"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 38HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Link TSR: Total Site Runoff - S1 thru S6 Inflow Area = 6.739 ac, 3.97% Impervious, Inflow Depth = 0.06" for 10-year event Inflow = 0.06 cfs @ 14.83 hrs, Volume= 0.036 af Primary = 0.06 cfs @ 14.83 hrs, Volume= 0.036 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Link TSR: Total Site Runoff - S1 thru S6 Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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=6.739 ac 0.06 cfs 0.06 cfs Type III 24-hr 25-year Rainfall=5.84"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 39HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Time span=0.00-28.00 hrs, dt=0.03 hrs, 934 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=24,842 sf 24.14% Impervious Runoff Depth=1.28"Subcatchment 1S: Post-Development Flow Length=160' Tc=9.5 min CN=53 Runoff=0.63 cfs 0.061 af Runoff Area=9,726 sf 0.00% Impervious Runoff Depth=0.40"Subcatchment 2S: Post-Development Tc=6.0 min CN=39 Runoff=0.03 cfs 0.007 af Runoff Area=74,637 sf 3.89% Impervious Runoff Depth=0.45"Subcatchment 3S: Post-Development Flow Length=500' Tc=10.4 min CN=40 Runoff=0.30 cfs 0.065 af Runoff Area=2,844 sf 27.81% Impervious Runoff Depth=1.43"Subcatchment 4S: Post-Development Tc=6.0 min CN=55 Runoff=0.10 cfs 0.008 af Runoff Area=21,393 sf 6.35% Impervious Runoff Depth=0.56"Subcatchment 5S: Post-Development Tc=6.0 min CN=42 Runoff=0.13 cfs 0.023 af Runoff Area=160,100 sf 0.38% Impervious Runoff Depth=0.30"Subcatchment 6S: Post-Development Flow Length=550' Tc=12.6 min CN=37 Runoff=0.29 cfs 0.093 af Peak Elev=51.08' Storage=1,041 cf Inflow=0.63 cfs 0.061 afPond S1: Swale Leaching - S1 Discarded=0.07 cfs 0.061 af Primary=0.00 cfs 0.000 af Outflow=0.07 cfs 0.061 af Peak Elev=38.01' Storage=6 cf Inflow=0.03 cfs 0.007 afPond S2: Swale Leaching - S2 Discarded=0.03 cfs 0.007 af Primary=0.00 cfs 0.000 af Outflow=0.03 cfs 0.007 af Peak Elev=28.15' Storage=303 cf Inflow=0.30 cfs 0.065 afPond S3: Swale Leaching - S3 Discarded=0.12 cfs 0.065 af Primary=0.00 cfs 0.000 af Outflow=0.12 cfs 0.065 af Peak Elev=56.33' Storage=90 cf Inflow=0.10 cfs 0.008 afPond S4: Swale Leaching - S4 Discarded=0.02 cfs 0.008 af Primary=0.00 cfs 0.000 af Outflow=0.02 cfs 0.008 af Peak Elev=48.20' Storage=147 cf Inflow=0.13 cfs 0.023 afPond S5: Swale Leaching - S5 Discarded=0.04 cfs 0.023 af Primary=0.00 cfs 0.000 af Outflow=0.04 cfs 0.023 af Inflow=0.29 cfs 0.093 afLink TSR: Total Site Runoff - S1 thru S6 Primary=0.29 cfs 0.093 af Total Runoff Area = 6.739 ac Runoff Volume = 0.257 af Average Runoff Depth = 0.46" 96.03% Pervious = 6.471 ac 3.97% Impervious = 0.268 ac Type III 24-hr 25-year Rainfall=5.84"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 40HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Post-Development Watershed - S1 Runoff = 0.63 cfs @ 12.16 hrs, Volume= 0.061 af, Depth= 1.28" Routed to Pond S1 : Swale Leaching - S1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 25-year Rainfall=5.84" Area (sf) CN Description 5,997 98 Paved parking, HSG A 18,845 39 >75% Grass cover, Good, HSG A 24,842 53 Weighted Average 18,845 75.86% Pervious Area 5,997 24.14% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 50 0.0200 0.10 Sheet Flow, Grass: Dense n= 0.240 P2= 3.36" 1.5 110 0.0300 1.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 9.5 160 Total Subcatchment 1S: Post-Development Watershed - S1 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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 Type III 24-hr 25-year Rainfall=5.84" Runoff Area=24,842 sf Runoff Volume=0.061 af Runoff Depth=1.28" Flow Length=160' Tc=9.5 min CN=53 0.63 cfs Type III 24-hr 25-year Rainfall=5.84"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 41HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2S: Post-Development Watershed - S2 Runoff = 0.03 cfs @ 12.36 hrs, Volume= 0.007 af, Depth= 0.40" Routed to Pond S2 : Swale Leaching - S2 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 25-year Rainfall=5.84" Area (sf) CN Description 9,726 39 >75% Grass cover, Good, HSG A 9,726 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, (minimum) 5.0 0 Total, Increased to minimum Tc = 6.0 min Subcatchment 2S: Post-Development Watershed - S2 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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 Type III 24-hr 25-year Rainfall=5.84" Runoff Area=9,726 sf Runoff Volume=0.007 af Runoff Depth=0.40" Tc=6.0 min CN=39 0.03 cfs Type III 24-hr 25-year Rainfall=5.84"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 42HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: Post-Development Watershed - S3 Runoff = 0.30 cfs @ 12.40 hrs, Volume= 0.065 af, Depth= 0.45" Routed to Pond S3 : Swale Leaching - S3 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 25-year Rainfall=5.84" Area (sf) CN Description 2,900 98 Paved parking, HSG A 46,737 39 >75% Grass cover, Good, HSG A 25,000 36 Woods, Fair, HSG A 74,637 40 Weighted Average 71,737 96.11% Pervious Area 2,900 3.89% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.1 50 0.0400 0.14 Sheet Flow, Grass: Dense n= 0.240 P2= 3.36" 3.6 300 0.0400 1.40 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.7 150 0.1000 3.61 45.08 Channel Flow, Area= 12.5 sf Perim= 5.0' r= 2.50' n= 0.240 Sheet flow over Dense Grass 10.4 500 Total Subcatchment 3S: Post-Development Watershed - S3 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Type III 24-hr 25-year Rainfall=5.84" Runoff Area=74,637 sf Runoff Volume=0.065 af Runoff Depth=0.45" Flow Length=500' Tc=10.4 min CN=40 0.30 cfs Type III 24-hr 25-year Rainfall=5.84"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 43HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 4S: Post-Development Watershed - S4 Runoff = 0.10 cfs @ 12.10 hrs, Volume= 0.008 af, Depth= 1.43" Routed to Pond S4 : Swale Leaching - S4 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 25-year Rainfall=5.84" Area (sf) CN Description 791 98 Paved parking, HSG A 2,053 39 >75% Grass cover, Good, HSG A 2,844 55 Weighted Average 2,053 72.19% Pervious Area 791 27.81% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, (minimum) 5.0 0 Total, Increased to minimum Tc = 6.0 min Subcatchment 4S: Post-Development Watershed - S4 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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 Type III 24-hr 25-year Rainfall=5.84" Runoff Area=2,844 sf Runoff Volume=0.008 af Runoff Depth=1.43" Tc=6.0 min CN=55 0.10 cfs Type III 24-hr 25-year Rainfall=5.84"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 44HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 5S: Post-Development Watershed - S5 Runoff = 0.13 cfs @ 12.28 hrs, Volume= 0.023 af, Depth= 0.56" Routed to Pond S5 : Swale Leaching - S5 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 25-year Rainfall=5.84" Area (sf) CN Description 1,359 98 Paved parking, HSG A 15,534 39 >75% Grass cover, Good, HSG A 4,500 36 Woods, Fair, HSG A 21,393 42 Weighted Average 20,034 93.65% Pervious Area 1,359 6.35% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, (minimum) 5.0 0 Total, Increased to minimum Tc = 6.0 min Subcatchment 5S: Post-Development Watershed - S5 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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 Type III 24-hr 25-year Rainfall=5.84" Runoff Area=21,393 sf Runoff Volume=0.023 af Runoff Depth=0.56" Tc=6.0 min CN=42 0.13 cfs Type III 24-hr 25-year Rainfall=5.84"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 45HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 6S: Post-Development Watershed - Non-Recharge Areas - S6 Runoff = 0.29 cfs @ 12.52 hrs, Volume= 0.093 af, Depth= 0.30" Routed to Link TSR : Total Site Runoff - S1 thru S6 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 25-year Rainfall=5.84" Area (sf) CN Description 611 98 Paved parking, HSG A 30,000 39 >75% Grass cover, Good, HSG A 129,489 36 Woods, Fair, HSG A 160,100 37 Weighted Average 159,489 99.62% Pervious Area 611 0.38% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.3 50 0.1000 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 6.3 500 0.0700 1.32 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 12.6 550 Total Subcatchment 6S: Post-Development Watershed - Non-Recharge Areas - S6 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Type III 24-hr 25-year Rainfall=5.84" Runoff Area=160,100 sf Runoff Volume=0.093 af Runoff Depth=0.30" Flow Length=550' Tc=12.6 min CN=37 0.29 cfs Type III 24-hr 25-year Rainfall=5.84"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 46HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond S1: Swale Leaching - S1 Inflow Area = 0.570 ac, 24.14% Impervious, Inflow Depth = 1.28" for 25-year event Inflow = 0.63 cfs @ 12.16 hrs, Volume= 0.061 af Outflow = 0.07 cfs @ 14.68 hrs, Volume= 0.061 af, Atten= 90%, Lag= 151.2 min Discarded = 0.07 cfs @ 14.68 hrs, Volume= 0.061 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - S1 thru S6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 51.08' @ 14.68 hrs Surf.Area= 1,166 sf Storage= 1,041 cf Plug-Flow detention time= 186.6 min calculated for 0.061 af (100% of inflow) Center-of-Mass det. time= 186.4 min ( 1,075.6 - 889.1 ) Volume Invert Avail.Storage Storage Description #1 50.00' 2,293 cf Grassed Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 50.00 779 139.0 0 0 779 52.00 1,559 210.0 2,293 2,293 2,781 Device Routing Invert Outlet Devices #1 Discarded 50.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 51.90'10.0' long (Profile 6) Broad-Crested Rectangular Weir Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.07 cfs @ 14.68 hrs HW=51.08' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.07 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=50.00' TW=0.00' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Type III 24-hr 25-year Rainfall=5.84"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 47HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond S1: Swale Leaching - S1 Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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=0.570 ac Peak Elev=51.08' Storage=1,041 cf 0.63 cfs 0.07 cfs 0.07 cfs 0.00 cfs Type III 24-hr 25-year Rainfall=5.84"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 48HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond S2: Swale Leaching - S2 Inflow Area = 0.223 ac, 0.00% Impervious, Inflow Depth = 0.40" for 25-year event Inflow = 0.03 cfs @ 12.36 hrs, Volume= 0.007 af Outflow = 0.03 cfs @ 12.41 hrs, Volume= 0.007 af, Atten= 3%, Lag= 3.1 min Discarded = 0.03 cfs @ 12.41 hrs, Volume= 0.007 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - S1 thru S6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 38.01' @ 12.41 hrs Surf.Area= 642 sf Storage= 6 cf Plug-Flow detention time= 3.0 min calculated for 0.007 af (100% of inflow) Center-of-Mass det. time= 3.0 min ( 968.7 - 965.7 ) Volume Invert Avail.Storage Storage Description #1 38.00' 856 cf Grassed Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 38.00 638 222.0 0 0 638 39.00 1,095 235.0 856 856 1,163 Device Routing Invert Outlet Devices #1 Discarded 38.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 38.90'10.0' long (Profile 6) Broad-Crested Rectangular Weir Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.03 cfs @ 12.41 hrs HW=38.01' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.03 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=38.00' TW=0.00' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Type III 24-hr 25-year Rainfall=5.84"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 49HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond S2: Swale Leaching - S2 Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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=0.223 ac Peak Elev=38.01' Storage=6 cf 0.03 cfs 0.03 cfs 0.03 cfs 0.00 cfs Type III 24-hr 25-year Rainfall=5.84"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 50HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond S3: Swale Leaching - S3 Inflow Area = 1.713 ac, 3.89% Impervious, Inflow Depth = 0.45" for 25-year event Inflow = 0.30 cfs @ 12.40 hrs, Volume= 0.065 af Outflow = 0.12 cfs @ 13.26 hrs, Volume= 0.065 af, Atten= 61%, Lag= 51.3 min Discarded = 0.12 cfs @ 13.26 hrs, Volume= 0.065 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - S1 thru S6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 28.15' @ 13.26 hrs Surf.Area= 2,127 sf Storage= 303 cf Plug-Flow detention time= 19.2 min calculated for 0.064 af (100% of inflow) Center-of-Mass det. time= 19.2 min ( 979.7 - 960.4 ) Volume Invert Avail.Storage Storage Description #1 28.00' 5,894 cf Grassed Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 28.00 2,004 189.0 0 0 2,004 30.00 4,004 312.0 5,894 5,894 6,933 Device Routing Invert Outlet Devices #1 Discarded 28.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 29.90'10.0' long (Profile 6) Broad-Crested Rectangular Weir Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.12 cfs @ 13.26 hrs HW=28.15' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.12 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=28.00' TW=0.00' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Type III 24-hr 25-year Rainfall=5.84"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 51HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond S3: Swale Leaching - S3 Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=1.713 ac Peak Elev=28.15' Storage=303 cf 0.30 cfs 0.12 cfs 0.12 cfs 0.00 cfs Type III 24-hr 25-year Rainfall=5.84"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 52HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond S4: Swale Leaching - S4 Inflow Area = 0.065 ac, 27.81% Impervious, Inflow Depth = 1.43" for 25-year event Inflow = 0.10 cfs @ 12.10 hrs, Volume= 0.008 af Outflow = 0.02 cfs @ 12.74 hrs, Volume= 0.008 af, Atten= 82%, Lag= 38.2 min Discarded = 0.02 cfs @ 12.74 hrs, Volume= 0.008 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - S1 thru S6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 56.33' @ 12.74 hrs Surf.Area= 306 sf Storage= 90 cf Plug-Flow detention time= 42.4 min calculated for 0.008 af (100% of inflow) Center-of-Mass det. time= 42.3 min ( 921.5 - 879.2 ) Volume Invert Avail.Storage Storage Description #1 56.00' 342 cf Grassed Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 56.00 248 92.0 0 0 248 57.00 446 105.0 342 342 474 Device Routing Invert Outlet Devices #1 Discarded 56.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 56.90'10.0' long (Profile 6) Broad-Crested Rectangular Weir Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.02 cfs @ 12.74 hrs HW=56.33' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.02 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=56.00' TW=0.00' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Type III 24-hr 25-year Rainfall=5.84"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 53HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond S4: Swale Leaching - S4 Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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=0.065 ac Peak Elev=56.33' Storage=90 cf 0.10 cfs 0.02 cfs 0.02 cfs 0.00 cfs Type III 24-hr 25-year Rainfall=5.84"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 54HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond S5: Swale Leaching - S5 Inflow Area = 0.491 ac, 6.35% Impervious, Inflow Depth = 0.56" for 25-year event Inflow = 0.13 cfs @ 12.28 hrs, Volume= 0.023 af Outflow = 0.04 cfs @ 13.08 hrs, Volume= 0.023 af, Atten= 67%, Lag= 48.0 min Discarded = 0.04 cfs @ 13.08 hrs, Volume= 0.023 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - S1 thru S6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 48.20' @ 13.08 hrs Surf.Area= 770 sf Storage= 147 cf Plug-Flow detention time= 26.8 min calculated for 0.023 af (100% of inflow) Center-of-Mass det. time= 26.8 min ( 967.1 - 940.3 ) Volume Invert Avail.Storage Storage Description #1 48.00' 849 cf Grassed Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 48.00 721 125.0 0 0 721 49.00 983 137.0 849 849 1,003 Device Routing Invert Outlet Devices #1 Discarded 48.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 48.90'10.0' long (Profile 6) Broad-Crested Rectangular Weir Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.04 cfs @ 13.08 hrs HW=48.20' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.04 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=48.00' TW=0.00' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Type III 24-hr 25-year Rainfall=5.84"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 55HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond S5: Swale Leaching - S5 Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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 Inflow Area=0.491 ac Peak Elev=48.20' Storage=147 cf 0.13 cfs 0.04 cfs 0.04 cfs 0.00 cfs Type III 24-hr 25-year Rainfall=5.84"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 56HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Link TSR: Total Site Runoff - S1 thru S6 Inflow Area = 6.739 ac, 3.97% Impervious, Inflow Depth = 0.17" for 25-year event Inflow = 0.29 cfs @ 12.52 hrs, Volume= 0.093 af Primary = 0.29 cfs @ 12.52 hrs, Volume= 0.093 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Link TSR: Total Site Runoff - S1 thru S6 Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=6.739 ac 0.29 cfs 0.29 cfs Type III 24-hr 100-year Rainfall=7.31"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 57HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Time span=0.00-28.00 hrs, dt=0.03 hrs, 934 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=24,842 sf 24.14% Impervious Runoff Depth=2.13"Subcatchment 1S: Post-Development Flow Length=160' Tc=9.5 min CN=53 Runoff=1.16 cfs 0.101 af Runoff Area=9,726 sf 0.00% Impervious Runoff Depth=0.88"Subcatchment 2S: Post-Development Tc=6.0 min CN=39 Runoff=0.12 cfs 0.016 af Runoff Area=74,637 sf 3.89% Impervious Runoff Depth=0.96"Subcatchment 3S: Post-Development Flow Length=500' Tc=10.4 min CN=40 Runoff=0.98 cfs 0.137 af Runoff Area=2,844 sf 27.81% Impervious Runoff Depth=2.32"Subcatchment 4S: Post-Development Tc=6.0 min CN=55 Runoff=0.17 cfs 0.013 af Runoff Area=21,393 sf 6.35% Impervious Runoff Depth=1.13"Subcatchment 5S: Post-Development Tc=6.0 min CN=42 Runoff=0.44 cfs 0.046 af Runoff Area=160,100 sf 0.38% Impervious Runoff Depth=0.73"Subcatchment 6S: Post-Development Flow Length=550' Tc=12.6 min CN=37 Runoff=1.22 cfs 0.223 af Peak Elev=51.89' Storage=2,125 cf Inflow=1.16 cfs 0.101 afPond S1: Swale Leaching - S1 Discarded=0.08 cfs 0.096 af Primary=0.00 cfs 0.000 af Outflow=0.08 cfs 0.096 af Peak Elev=38.16' Storage=109 cf Inflow=0.12 cfs 0.016 afPond S2: Swale Leaching - S2 Discarded=0.04 cfs 0.016 af Primary=0.00 cfs 0.000 af Outflow=0.04 cfs 0.016 af Peak Elev=28.82' Storage=1,950 cf Inflow=0.98 cfs 0.137 afPond S3: Swale Leaching - S3 Discarded=0.15 cfs 0.137 af Primary=0.00 cfs 0.000 af Outflow=0.15 cfs 0.137 af Peak Elev=56.62' Storage=190 cf Inflow=0.17 cfs 0.013 afPond S4: Swale Leaching - S4 Discarded=0.02 cfs 0.013 af Primary=0.00 cfs 0.000 af Outflow=0.02 cfs 0.013 af Peak Elev=48.83' Storage=684 cf Inflow=0.44 cfs 0.046 afPond S5: Swale Leaching - S5 Discarded=0.05 cfs 0.046 af Primary=0.00 cfs 0.000 af Outflow=0.05 cfs 0.046 af Inflow=1.22 cfs 0.223 afLink TSR: Total Site Runoff - S1 thru S6 Primary=1.22 cfs 0.223 af Total Runoff Area = 6.739 ac Runoff Volume = 0.537 af Average Runoff Depth = 0.96" 96.03% Pervious = 6.471 ac 3.97% Impervious = 0.268 ac Type III 24-hr 100-year Rainfall=7.31"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 58HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Post-Development Watershed - S1 Runoff = 1.16 cfs @ 12.15 hrs, Volume= 0.101 af, Depth= 2.13" Routed to Pond S1 : Swale Leaching - S1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 100-year Rainfall=7.31" Area (sf) CN Description 5,997 98 Paved parking, HSG A 18,845 39 >75% Grass cover, Good, HSG A 24,842 53 Weighted Average 18,845 75.86% Pervious Area 5,997 24.14% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 50 0.0200 0.10 Sheet Flow, Grass: Dense n= 0.240 P2= 3.36" 1.5 110 0.0300 1.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 9.5 160 Total Subcatchment 1S: Post-Development Watershed - S1 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Type III 24-hr 100-year Rainfall=7.31" Runoff Area=24,842 sf Runoff Volume=0.101 af Runoff Depth=2.13" Flow Length=160' Tc=9.5 min CN=53 1.16 cfs Type III 24-hr 100-year Rainfall=7.31"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 59HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2S: Post-Development Watershed - S2 Runoff = 0.12 cfs @ 12.13 hrs, Volume= 0.016 af, Depth= 0.88" Routed to Pond S2 : Swale Leaching - S2 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 100-year Rainfall=7.31" Area (sf) CN Description 9,726 39 >75% Grass cover, Good, HSG A 9,726 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, (minimum) 5.0 0 Total, Increased to minimum Tc = 6.0 min Subcatchment 2S: Post-Development Watershed - S2 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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 Type III 24-hr 100-year Rainfall=7.31" Runoff Area=9,726 sf Runoff Volume=0.016 af Runoff Depth=0.88" Tc=6.0 min CN=39 0.12 cfs Type III 24-hr 100-year Rainfall=7.31"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 60HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: Post-Development Watershed - S3 Runoff = 0.98 cfs @ 12.21 hrs, Volume= 0.137 af, Depth= 0.96" Routed to Pond S3 : Swale Leaching - S3 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 100-year Rainfall=7.31" Area (sf) CN Description 2,900 98 Paved parking, HSG A 46,737 39 >75% Grass cover, Good, HSG A 25,000 36 Woods, Fair, HSG A 74,637 40 Weighted Average 71,737 96.11% Pervious Area 2,900 3.89% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.1 50 0.0400 0.14 Sheet Flow, Grass: Dense n= 0.240 P2= 3.36" 3.6 300 0.0400 1.40 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.7 150 0.1000 3.61 45.08 Channel Flow, Area= 12.5 sf Perim= 5.0' r= 2.50' n= 0.240 Sheet flow over Dense Grass 10.4 500 Total Subcatchment 3S: Post-Development Watershed - S3 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Type III 24-hr 100-year Rainfall=7.31" Runoff Area=74,637 sf Runoff Volume=0.137 af Runoff Depth=0.96" Flow Length=500' Tc=10.4 min CN=40 0.98 cfs Type III 24-hr 100-year Rainfall=7.31"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 61HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 4S: Post-Development Watershed - S4 Runoff = 0.17 cfs @ 12.10 hrs, Volume= 0.013 af, Depth= 2.32" Routed to Pond S4 : Swale Leaching - S4 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 100-year Rainfall=7.31" Area (sf) CN Description 791 98 Paved parking, HSG A 2,053 39 >75% Grass cover, Good, HSG A 2,844 55 Weighted Average 2,053 72.19% Pervious Area 791 27.81% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, (minimum) 5.0 0 Total, Increased to minimum Tc = 6.0 min Subcatchment 4S: Post-Development Watershed - S4 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.18 0.17 0.16 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 Type III 24-hr 100-year Rainfall=7.31" Runoff Area=2,844 sf Runoff Volume=0.013 af Runoff Depth=2.32" Tc=6.0 min CN=55 0.17 cfs Type III 24-hr 100-year Rainfall=7.31"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 62HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 5S: Post-Development Watershed - S5 Runoff = 0.44 cfs @ 12.12 hrs, Volume= 0.046 af, Depth= 1.13" Routed to Pond S5 : Swale Leaching - S5 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 100-year Rainfall=7.31" Area (sf) CN Description 1,359 98 Paved parking, HSG A 15,534 39 >75% Grass cover, Good, HSG A 4,500 36 Woods, Fair, HSG A 21,393 42 Weighted Average 20,034 93.65% Pervious Area 1,359 6.35% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, (minimum) 5.0 0 Total, Increased to minimum Tc = 6.0 min Subcatchment 5S: Post-Development Watershed - S5 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.48 0.46 0.44 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Type III 24-hr 100-year Rainfall=7.31" Runoff Area=21,393 sf Runoff Volume=0.046 af Runoff Depth=1.13" Tc=6.0 min CN=42 0.44 cfs Type III 24-hr 100-year Rainfall=7.31"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 63HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 6S: Post-Development Watershed - Non-Recharge Areas - S6 Runoff = 1.22 cfs @ 12.38 hrs, Volume= 0.223 af, Depth= 0.73" Routed to Link TSR : Total Site Runoff - S1 thru S6 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Type III 24-hr 100-year Rainfall=7.31" Area (sf) CN Description 611 98 Paved parking, HSG A 30,000 39 >75% Grass cover, Good, HSG A 129,489 36 Woods, Fair, HSG A 160,100 37 Weighted Average 159,489 99.62% Pervious Area 611 0.38% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.3 50 0.1000 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.36" 6.3 500 0.0700 1.32 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 12.6 550 Total Subcatchment 6S: Post-Development Watershed - Non-Recharge Areas - S6 Runoff Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Type III 24-hr 100-year Rainfall=7.31" Runoff Area=160,100 sf Runoff Volume=0.223 af Runoff Depth=0.73" Flow Length=550' Tc=12.6 min CN=37 1.22 cfs Type III 24-hr 100-year Rainfall=7.31"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 64HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond S1: Swale Leaching - S1 Inflow Area = 0.570 ac, 24.14% Impervious, Inflow Depth = 2.13" for 100-year event Inflow = 1.16 cfs @ 12.15 hrs, Volume= 0.101 af Outflow = 0.08 cfs @ 15.30 hrs, Volume= 0.096 af, Atten= 93%, Lag= 189.2 min Discarded = 0.08 cfs @ 15.30 hrs, Volume= 0.096 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - S1 thru S6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 51.89' @ 15.30 hrs Surf.Area= 1,509 sf Storage= 2,125 cf Plug-Flow detention time= 307.7 min calculated for 0.096 af (95% of inflow) Center-of-Mass det. time= 283.2 min ( 1,155.1 - 871.9 ) Volume Invert Avail.Storage Storage Description #1 50.00' 2,293 cf Grassed Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 50.00 779 139.0 0 0 779 52.00 1,559 210.0 2,293 2,293 2,781 Device Routing Invert Outlet Devices #1 Discarded 50.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 51.90'10.0' long (Profile 6) Broad-Crested Rectangular Weir Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.08 cfs @ 15.30 hrs HW=51.89' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.08 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=50.00' TW=0.00' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Type III 24-hr 100-year Rainfall=7.31"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 65HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond S1: Swale Leaching - S1 Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Inflow Area=0.570 ac Peak Elev=51.89' Storage=2,125 cf 1.16 cfs 0.08 cfs 0.08 cfs 0.00 cfs Type III 24-hr 100-year Rainfall=7.31"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 66HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond S2: Swale Leaching - S2 Inflow Area = 0.223 ac, 0.00% Impervious, Inflow Depth = 0.88" for 100-year event Inflow = 0.12 cfs @ 12.13 hrs, Volume= 0.016 af Outflow = 0.04 cfs @ 12.73 hrs, Volume= 0.016 af, Atten= 68%, Lag= 35.9 min Discarded = 0.04 cfs @ 12.73 hrs, Volume= 0.016 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - S1 thru S6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 38.16' @ 12.73 hrs Surf.Area= 704 sf Storage= 109 cf Plug-Flow detention time= 18.5 min calculated for 0.016 af (100% of inflow) Center-of-Mass det. time= 18.5 min ( 942.7 - 924.2 ) Volume Invert Avail.Storage Storage Description #1 38.00' 856 cf Grassed Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 38.00 638 222.0 0 0 638 39.00 1,095 235.0 856 856 1,163 Device Routing Invert Outlet Devices #1 Discarded 38.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 38.90'10.0' long (Profile 6) Broad-Crested Rectangular Weir Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.04 cfs @ 12.73 hrs HW=38.16' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.04 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=38.00' TW=0.00' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Type III 24-hr 100-year Rainfall=7.31"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 67HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond S2: Swale Leaching - S2 Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)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 Inflow Area=0.223 ac Peak Elev=38.16' Storage=109 cf 0.12 cfs 0.04 cfs 0.04 cfs 0.00 cfs Type III 24-hr 100-year Rainfall=7.31"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 68HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond S3: Swale Leaching - S3 Inflow Area = 1.713 ac, 3.89% Impervious, Inflow Depth = 0.96" for 100-year event Inflow = 0.98 cfs @ 12.21 hrs, Volume= 0.137 af Outflow = 0.15 cfs @ 15.17 hrs, Volume= 0.137 af, Atten= 84%, Lag= 177.4 min Discarded = 0.15 cfs @ 15.17 hrs, Volume= 0.137 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - S1 thru S6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 28.82' @ 15.17 hrs Surf.Area= 2,745 sf Storage= 1,950 cf Plug-Flow detention time= 146.3 min calculated for 0.137 af (100% of inflow) Center-of-Mass det. time= 146.2 min ( 1,068.5 - 922.4 ) Volume Invert Avail.Storage Storage Description #1 28.00' 5,894 cf Grassed Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 28.00 2,004 189.0 0 0 2,004 30.00 4,004 312.0 5,894 5,894 6,933 Device Routing Invert Outlet Devices #1 Discarded 28.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 29.90'10.0' long (Profile 6) Broad-Crested Rectangular Weir Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.15 cfs @ 15.17 hrs HW=28.82' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.15 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=28.00' TW=0.00' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Type III 24-hr 100-year Rainfall=7.31"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 69HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond S3: Swale Leaching - S3 Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Inflow Area=1.713 ac Peak Elev=28.82' Storage=1,950 cf 0.98 cfs 0.15 cfs 0.15 cfs 0.00 cfs Type III 24-hr 100-year Rainfall=7.31"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 70HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond S4: Swale Leaching - S4 Inflow Area = 0.065 ac, 27.81% Impervious, Inflow Depth = 2.32" for 100-year event Inflow = 0.17 cfs @ 12.10 hrs, Volume= 0.013 af Outflow = 0.02 cfs @ 13.03 hrs, Volume= 0.013 af, Atten= 88%, Lag= 55.7 min Discarded = 0.02 cfs @ 13.03 hrs, Volume= 0.013 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - S1 thru S6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 56.62' @ 13.03 hrs Surf.Area= 365 sf Storage= 190 cf Plug-Flow detention time= 91.2 min calculated for 0.013 af (100% of inflow) Center-of-Mass det. time= 91.1 min ( 954.4 - 863.3 ) Volume Invert Avail.Storage Storage Description #1 56.00' 342 cf Grassed Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 56.00 248 92.0 0 0 248 57.00 446 105.0 342 342 474 Device Routing Invert Outlet Devices #1 Discarded 56.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 56.90'10.0' long (Profile 6) Broad-Crested Rectangular Weir Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.02 cfs @ 13.03 hrs HW=56.62' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.02 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=56.00' TW=0.00' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Type III 24-hr 100-year Rainfall=7.31"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 71HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond S4: Swale Leaching - S4 Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.18 0.17 0.16 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 Inflow Area=0.065 ac Peak Elev=56.62' Storage=190 cf 0.17 cfs 0.02 cfs 0.02 cfs 0.00 cfs Type III 24-hr 100-year Rainfall=7.31"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 72HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Pond S5: Swale Leaching - S5 Inflow Area = 0.491 ac, 6.35% Impervious, Inflow Depth = 1.13" for 100-year event Inflow = 0.44 cfs @ 12.12 hrs, Volume= 0.046 af Outflow = 0.05 cfs @ 14.84 hrs, Volume= 0.046 af, Atten= 88%, Lag= 163.4 min Discarded = 0.05 cfs @ 14.84 hrs, Volume= 0.046 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link TSR : Total Site Runoff - S1 thru S6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Peak Elev= 48.83' @ 14.84 hrs Surf.Area= 935 sf Storage= 684 cf Plug-Flow detention time= 147.7 min calculated for 0.046 af (100% of inflow) Center-of-Mass det. time= 147.6 min ( 1,055.4 - 907.9 ) Volume Invert Avail.Storage Storage Description #1 48.00' 849 cf Grassed Swale (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 48.00 721 125.0 0 0 721 49.00 983 137.0 849 849 1,003 Device Routing Invert Outlet Devices #1 Discarded 48.00'2.410 in/hr Exfiltration over Horizontal area Phase-In= 0.01' #2 Primary 48.90'10.0' long (Profile 6) Broad-Crested Rectangular Weir Head (feet) 0.49 0.98 1.48 Coef. (English) 3.12 3.41 3.59 Discarded OutFlow Max=0.05 cfs @ 14.84 hrs HW=48.83' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.05 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=48.00' TW=0.00' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Type III 24-hr 100-year Rainfall=7.31"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 73HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Pond S5: Swale Leaching - S5 Inflow Outflow Discarded Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=0.491 ac Peak Elev=48.83' Storage=684 cf 0.44 cfs 0.05 cfs 0.05 cfs 0.00 cfs Type III 24-hr 100-year Rainfall=7.31"8807.S1 thru S6(5.1.23) Printed 6/5/2023Prepared by J M O'Reilly & Associates Inc Page 74HydroCAD® 10.20-2g s/n 08678 © 2022 HydroCAD Software Solutions LLC Summary for Link TSR: Total Site Runoff - S1 thru S6 Inflow Area = 6.739 ac, 3.97% Impervious, Inflow Depth = 0.40" for 100-year event Inflow = 1.22 cfs @ 12.38 hrs, Volume= 0.223 af Primary = 1.22 cfs @ 12.38 hrs, Volume= 0.223 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-27.99 hrs, dt= 0.03 hrs Link TSR: Total Site Runoff - S1 thru S6 Inflow Primary Hydrograph Time (hours) 26242220181614121086420Flow (cfs)1 0 Inflow Area=6.739 ac 1.22 cfs 1.22 cfs