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HomeMy WebLinkAboutSP-23-027 - Supplemental - 0550 Dorset Street (4)2S DA1.1 1P Stone Diaphram 2P Det. Trench 4P Filter Strip 2L SN1 Routing Diagram for 22714 Concept Prepared by Engineering Ventures, Inc, Printed 5/17/2023 HydroCAD® 10.20-2g s/n 02106 © 2022 HydroCAD Software Solutions LLC Subcat Reach Pond Link Type II 24-hr 1-YR Rainfall=1.88"22714 Concept Printed 5/17/2023Prepared by Engineering Ventures, Inc Page 2HydroCAD® 10.20-2g s/n 02106 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2S: DA1.1 Runoff = 0.32 cfs @ 11.95 hrs, Volume= 0.017 af, Depth= 1.66" Routed to Pond 1P : Stone Diaphram Runoff by SCS TR-20 method, UH=SCS, Weighted-Q, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Type II 24-hr 1-YR Rainfall=1.88" Area (ac) CN Description 0.120 98 Paved parking, HSG A 0.120 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.3 60 0.0150 0.77 Lag/CN Method, 1.3 60 Total, Increased to minimum Tc = 5.0 min Summary for Pond 1P: Stone Diaphram Inflow Area = 0.120 ac,100.00% Impervious, Inflow Depth = 1.66" for 1-YR event Inflow = 0.32 cfs @ 11.95 hrs, Volume= 0.017 af Outflow = 0.32 cfs @ 11.95 hrs, Volume= 0.017 af, Atten= 0%, Lag= 0.0 min Discarded = 0.00 cfs @ 11.90 hrs, Volume= 0.000 af Primary = 0.32 cfs @ 11.95 hrs, Volume= 0.016 af Routed to Pond 4P : Filter Strip Routing by Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Peak Elev= 305.51' @ 11.95 hrs Surf.Area= 0.004 ac Storage= 0.000 af Plug-Flow detention time= 0.0 min calculated for 0.017 af (100% of inflow) Center-of-Mass det. time= 0.0 min ( 764.5 - 764.5 ) Volume Invert Avail.Storage Storage Description #1 305.50' 0.001 af 2.00'W x 96.00'L x 1.00'H Prismatoid 0.004 af Overall x 30.0% Voids Device Routing Invert Outlet Devices #1 Discarded 305.50'0.200 in/hr Exfiltration over Surface area below 305.51' #2 Primary 305.50'96.0' long x 1.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32 Discarded OutFlow Max=0.00 cfs @ 11.90 hrs HW=305.51' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.00 cfs) Primary OutFlow Max=0.31 cfs @ 11.95 hrs HW=305.51' (Free Discharge) 2=Broad-Crested Rectangular Weir (Weir Controls 0.31 cfs @ 0.28 fps) Type II 24-hr 1-YR Rainfall=1.88"22714 Concept Printed 5/17/2023Prepared by Engineering Ventures, Inc Page 3HydroCAD® 10.20-2g s/n 02106 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2P: Det. Trench Inflow Area = 0.120 ac,100.00% Impervious, Inflow Depth = 0.00" for 1-YR 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 2L : SN1 Routing by Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Peak Elev= 304.00' @ 0.00 hrs Surf.Area= 0.002 ac Storage= 0.000 af 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 #1 304.00' 0.007 af 1.00'W x 96.00'L x 1.00'H Prismatoid Z=2.0 #2 305.00' 0.007 af Custom Stage Data (Prismatic) Listed below (Recalc) 0.014 af Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet) 305.00 0.011 0.000 0.000 305.50 0.018 0.007 0.007 Device Routing Invert Outlet Devices #1 Primary 305.00'96.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) 0.5' Crest Height #2 Discarded 304.00'0.200 in/hr Exfiltration over Surface area below 305.10' Discarded OutFlow Max=0.00 cfs @ 0.00 hrs HW=304.00' (Free Discharge) 2=Exfiltration (Passes 0.00 cfs of 0.00 cfs potential flow) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=304.00' (Free Discharge) 1=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) Summary for Pond 4P: Filter Strip Inflow Area = 0.120 ac,100.00% Impervious, Inflow Depth = 1.65" for 1-YR event Inflow = 0.32 cfs @ 11.95 hrs, Volume= 0.016 af Outflow = 0.02 cfs @ 11.30 hrs, Volume= 0.016 af, Atten= 95%, Lag= 0.0 min Discarded = 0.02 cfs @ 11.30 hrs, Volume= 0.016 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Pond 2P : Det. Trench Routing by Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Peak Elev= 305.47' @ 12.91 hrs Surf.Area= 0.077 ac Storage= 0.007 af Plug-Flow detention time= 161.1 min calculated for 0.016 af (100% of inflow) Center-of-Mass det. time= 160.9 min ( 925.5 - 764.5 ) Type II 24-hr 1-YR Rainfall=1.88"22714 Concept Printed 5/17/2023Prepared by Engineering Ventures, Inc Page 4HydroCAD® 10.20-2g s/n 02106 © 2022 HydroCAD Software Solutions LLC Volume Invert Avail.Storage Storage Description #1 305.00' 0.023 af Custom Stage Data (Prismatic) Listed below (Recalc) 0.116 af Overall x 20.0% Voids Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet) 305.00 0.077 0.000 0.000 306.50 0.077 0.116 0.116 Device Routing Invert Outlet Devices #1 Discarded 305.00'0.200 in/hr Exfiltration over Surface area below 306.51' #2 Primary 306.00'96.0' long x 0.5' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 Coef. (English) 2.80 2.92 3.08 3.30 3.32 Discarded OutFlow Max=0.02 cfs @ 11.30 hrs HW=305.02' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.02 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=305.00' (Free Discharge) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Summary for Link 2L: SN1 Inflow Area = 0.230 ac, 52.17% Impervious, Inflow Depth = 0.00" for 1-YR 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= 0.00-36.00 hrs, dt= 0.05 hrs 2S DA1.1 3S DA1.2 1P Stone Diaphram 2P Det. Trench 4P Filter Strip 2L SN1 Routing Diagram for 22714 Concept Prepared by Engineering Ventures, Inc, Printed 5/17/2023 HydroCAD® 10.20-2g s/n 02106 © 2022 HydroCAD Software Solutions LLC Subcat Reach Pond Link Type II 24-hr 10-YR Rainfall=3.22"22714 Concept Printed 5/17/2023Prepared by Engineering Ventures, Inc Page 2HydroCAD® 10.20-2g s/n 02106 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2S: DA1.1 Runoff = 0.55 cfs @ 11.95 hrs, Volume= 0.030 af, Depth= 2.99" Routed to Pond 1P : Stone Diaphram Runoff by SCS TR-20 method, UH=SCS, Weighted-Q, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=3.22" Area (ac) CN Description 0.120 98 Paved parking, HSG A 0.120 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.3 60 0.0150 0.77 Lag/CN Method, 1.3 60 Total, Increased to minimum Tc = 5.0 min Summary for Subcatchment 3S: DA1.2 Runoff = 0.00 cfs @ 24.08 hrs, Volume= 0.000 af, Depth= 0.00" Routed to Link 2L : SN1 Runoff by SCS TR-20 method, UH=SCS, Weighted-Q, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=3.22" Area (ac) CN Description 0.110 39 >75% Grass cover, Good, HSG A 0.110 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 23.4 215 0.0140 0.15 Lag/CN Method, Summary for Pond 1P: Stone Diaphram Inflow Area = 0.120 ac,100.00% Impervious, Inflow Depth = 2.99" for 10-YR event Inflow = 0.55 cfs @ 11.95 hrs, Volume= 0.030 af Outflow = 0.55 cfs @ 11.95 hrs, Volume= 0.030 af, Atten= 0%, Lag= 0.0 min Discarded = 0.00 cfs @ 11.85 hrs, Volume= 0.000 af Primary = 0.55 cfs @ 11.95 hrs, Volume= 0.030 af Routed to Pond 4P : Filter Strip Routing by Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Peak Elev= 305.52' @ 11.95 hrs Surf.Area= 0.004 ac Storage= 0.000 af Plug-Flow detention time= 0.0 min calculated for 0.030 af (100% of inflow) Center-of-Mass det. time= 0.0 min ( 751.5 - 751.4 ) Type II 24-hr 10-YR Rainfall=3.22"22714 Concept Printed 5/17/2023Prepared by Engineering Ventures, Inc Page 3HydroCAD® 10.20-2g s/n 02106 © 2022 HydroCAD Software Solutions LLC Volume Invert Avail.Storage Storage Description #1 305.50' 0.001 af 2.00'W x 96.00'L x 1.00'H Prismatoid 0.004 af Overall x 30.0% Voids Device Routing Invert Outlet Devices #1 Discarded 305.50'0.200 in/hr Exfiltration over Surface area below 305.51' #2 Primary 305.50'96.0' long x 1.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32 Discarded OutFlow Max=0.00 cfs @ 11.85 hrs HW=305.51' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.00 cfs) Primary OutFlow Max=0.53 cfs @ 11.95 hrs HW=305.52' (Free Discharge) 2=Broad-Crested Rectangular Weir (Weir Controls 0.53 cfs @ 0.34 fps) Summary for Pond 2P: Det. Trench Inflow Area = 0.120 ac,100.00% Impervious, Inflow Depth = 0.00" for 10-YR 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 2L : SN1 Routing by Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Peak Elev= 304.00' @ 0.00 hrs Surf.Area= 0.002 ac Storage= 0.000 af 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 #1 304.00' 0.007 af 1.00'W x 96.00'L x 1.00'H Prismatoid Z=2.0 #2 305.00' 0.007 af Custom Stage Data (Prismatic) Listed below (Recalc) 0.014 af Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet) 305.00 0.011 0.000 0.000 305.50 0.018 0.007 0.007 Device Routing Invert Outlet Devices #1 Primary 305.00'96.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) 0.5' Crest Height #2 Discarded 304.00'0.200 in/hr Exfiltration over Surface area below 305.10' Type II 24-hr 10-YR Rainfall=3.22"22714 Concept Printed 5/17/2023Prepared by Engineering Ventures, Inc Page 4HydroCAD® 10.20-2g s/n 02106 © 2022 HydroCAD Software Solutions LLC Discarded OutFlow Max=0.00 cfs @ 0.00 hrs HW=304.00' (Free Discharge) 2=Exfiltration (Passes 0.00 cfs of 0.00 cfs potential flow) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=304.00' (Free Discharge) 1=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) Summary for Pond 4P: Filter Strip Inflow Area = 0.120 ac,100.00% Impervious, Inflow Depth = 2.98" for 10-YR event Inflow = 0.55 cfs @ 11.95 hrs, Volume= 0.030 af Outflow = 0.02 cfs @ 10.40 hrs, Volume= 0.030 af, Atten= 97%, Lag= 0.0 min Discarded = 0.02 cfs @ 10.40 hrs, Volume= 0.030 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Pond 2P : Det. Trench Routing by Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Peak Elev= 305.99' @ 13.92 hrs Surf.Area= 0.077 ac Storage= 0.015 af Plug-Flow detention time= 366.7 min calculated for 0.030 af (100% of inflow) Center-of-Mass det. time= 366.5 min ( 1,118.0 - 751.5 ) Volume Invert Avail.Storage Storage Description #1 305.00' 0.023 af Custom Stage Data (Prismatic) Listed below (Recalc) 0.116 af Overall x 20.0% Voids Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet) 305.00 0.077 0.000 0.000 306.50 0.077 0.116 0.116 Device Routing Invert Outlet Devices #1 Discarded 305.00'0.200 in/hr Exfiltration over Surface area below 306.51' #2 Primary 306.00'96.0' long x 0.5' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 Coef. (English) 2.80 2.92 3.08 3.30 3.32 Discarded OutFlow Max=0.02 cfs @ 10.40 hrs HW=305.02' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.02 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=305.00' (Free Discharge) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Summary for Link 2L: SN1 Inflow Area = 0.230 ac, 52.17% Impervious, Inflow Depth = 0.00" for 10-YR event Inflow = 0.00 cfs @ 24.08 hrs, Volume= 0.000 af Primary = 0.00 cfs @ 24.08 hrs, Volume= 0.000 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs 1S DA1 1L SN1 Routing Diagram for 22714 Concept Prepared by Engineering Ventures, Inc, Printed 5/17/2023 HydroCAD® 10.20-2g s/n 02106 © 2022 HydroCAD Software Solutions LLC Subcat Reach Pond Link Type II 24-hr 100-YR Rainfall=4.80"22714 Concept Printed 5/17/2023Prepared by Engineering Ventures, Inc Page 2HydroCAD® 10.20-2g s/n 02106 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: DA1 Runoff = 0.00 cfs @ 24.03 hrs, Volume= 0.000 af, Depth= 0.00" Routed to Link 1L : SN1 Runoff by SCS TR-20 method, UH=SCS, Weighted-Q, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Type II 24-hr 100-YR Rainfall=4.80" Area (ac) CN Description 0.310 30 Woods, Good, HSG A 0.310 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.6 134 0.0250 0.14 Lag/CN Method, Summary for Link 1L: SN1 Inflow Area = 0.310 ac, 0.00% Impervious, Inflow Depth = 0.00" for 100-YR 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= 0.00-36.00 hrs, dt= 0.05 hrs 2S DA1.1 3S DA1.2 1P Stone Diaphram 2P Det. Trench 4P Filter Strip 2L SN1 Routing Diagram for 22714 Concept Prepared by Engineering Ventures, Inc, Printed 5/17/2023 HydroCAD® 10.20-2g s/n 02106 © 2022 HydroCAD Software Solutions LLC Subcat Reach Pond Link Type II 24-hr 100-YR Rainfall=4.80"22714 Concept Printed 5/17/2023Prepared by Engineering Ventures, Inc Page 2HydroCAD® 10.20-2g s/n 02106 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment 2S: DA1.1 Runoff = 0.83 cfs @ 11.95 hrs, Volume= 0.046 af, Depth= 4.56" Routed to Pond 1P : Stone Diaphram Runoff by SCS TR-20 method, UH=SCS, Weighted-Q, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Type II 24-hr 100-YR Rainfall=4.80" Area (ac) CN Description 0.120 98 Paved parking, HSG A 0.120 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.3 60 0.0150 0.77 Lag/CN Method, 1.3 60 Total, Increased to minimum Tc = 5.0 min Summary for Subcatchment 3S: DA1.2 Runoff = 0.00 cfs @ 13.05 hrs, Volume= 0.001 af, Depth= 0.16" Routed to Link 2L : SN1 Runoff by SCS TR-20 method, UH=SCS, Weighted-Q, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Type II 24-hr 100-YR Rainfall=4.80" Area (ac) CN Description 0.110 39 >75% Grass cover, Good, HSG A 0.110 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 23.4 215 0.0140 0.15 Lag/CN Method, Summary for Pond 1P: Stone Diaphram Inflow Area = 0.120 ac,100.00% Impervious, Inflow Depth = 4.56" for 100-YR event Inflow = 0.83 cfs @ 11.95 hrs, Volume= 0.046 af Outflow = 0.83 cfs @ 11.95 hrs, Volume= 0.046 af, Atten= 0%, Lag= 0.0 min Discarded = 0.00 cfs @ 11.75 hrs, Volume= 0.000 af Primary = 0.83 cfs @ 11.95 hrs, Volume= 0.046 af Routed to Pond 4P : Filter Strip Routing by Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Peak Elev= 305.52' @ 11.95 hrs Surf.Area= 0.004 ac Storage= 0.000 af Plug-Flow detention time= 0.0 min calculated for 0.046 af (100% of inflow) Center-of-Mass det. time= 0.0 min ( 743.7 - 743.7 ) Type II 24-hr 100-YR Rainfall=4.80"22714 Concept Printed 5/17/2023Prepared by Engineering Ventures, Inc Page 3HydroCAD® 10.20-2g s/n 02106 © 2022 HydroCAD Software Solutions LLC Volume Invert Avail.Storage Storage Description #1 305.50' 0.001 af 2.00'W x 96.00'L x 1.00'H Prismatoid 0.004 af Overall x 30.0% Voids Device Routing Invert Outlet Devices #1 Discarded 305.50'0.200 in/hr Exfiltration over Surface area below 305.51' #2 Primary 305.50'96.0' long x 1.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32 Discarded OutFlow Max=0.00 cfs @ 11.75 hrs HW=305.51' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.00 cfs) Primary OutFlow Max=0.82 cfs @ 11.95 hrs HW=305.52' (Free Discharge) 2=Broad-Crested Rectangular Weir (Weir Controls 0.82 cfs @ 0.40 fps) Summary for Pond 2P: Det. Trench Inflow Area = 0.120 ac,100.00% Impervious, Inflow Depth = 1.06" for 100-YR event Inflow = 0.88 cfs @ 12.00 hrs, Volume= 0.011 af Outflow = 0.11 cfs @ 12.35 hrs, Volume= 0.007 af, Atten= 88%, Lag= 20.9 min Discarded = 0.00 cfs @ 12.35 hrs, Volume= 0.005 af Primary = 0.10 cfs @ 12.35 hrs, Volume= 0.003 af Routed to Link 2L : SN1 Routing by Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Peak Elev= 305.00' @ 12.35 hrs Surf.Area= 0.023 ac Storage= 0.007 af Plug-Flow detention time= 390.6 min calculated for 0.007 af (69% of inflow) Center-of-Mass det. time= 372.4 min ( 1,116.5 - 744.1 ) Volume Invert Avail.Storage Storage Description #1 304.00' 0.007 af 1.00'W x 96.00'L x 1.00'H Prismatoid Z=2.0 #2 305.00' 0.007 af Custom Stage Data (Prismatic) Listed below (Recalc) 0.014 af Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet) 305.00 0.011 0.000 0.000 305.50 0.018 0.007 0.007 Device Routing Invert Outlet Devices #1 Primary 305.00'96.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) 0.5' Crest Height #2 Discarded 304.00'0.200 in/hr Exfiltration over Surface area below 305.10' Type II 24-hr 100-YR Rainfall=4.80"22714 Concept Printed 5/17/2023Prepared by Engineering Ventures, Inc Page 4HydroCAD® 10.20-2g s/n 02106 © 2022 HydroCAD Software Solutions LLC Discarded OutFlow Max=0.00 cfs @ 12.35 hrs HW=305.00' (Free Discharge) 2=Exfiltration (Exfiltration Controls 0.00 cfs) Primary OutFlow Max=0.09 cfs @ 12.35 hrs HW=305.00' (Free Discharge) 1=Sharp-Crested Rectangular Weir (Weir Controls 0.09 cfs @ 0.22 fps) Summary for Pond 4P: Filter Strip Inflow Area = 0.120 ac,100.00% Impervious, Inflow Depth = 4.55" for 100-YR event Inflow = 0.83 cfs @ 11.95 hrs, Volume= 0.046 af Outflow = 0.90 cfs @ 12.00 hrs, Volume= 0.046 af, Atten= 0%, Lag= 3.2 min Discarded = 0.02 cfs @ 8.95 hrs, Volume= 0.035 af Primary = 0.88 cfs @ 12.00 hrs, Volume= 0.011 af Routed to Pond 2P : Det. Trench Routing by Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Peak Elev= 306.02' @ 12.00 hrs Surf.Area= 0.077 ac Storage= 0.016 af Plug-Flow detention time= 293.7 min calculated for 0.045 af (100% of inflow) Center-of-Mass det. time= 294.0 min ( 1,037.7 - 743.7 ) Volume Invert Avail.Storage Storage Description #1 305.00' 0.023 af Custom Stage Data (Prismatic) Listed below (Recalc) 0.116 af Overall x 20.0% Voids Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet) 305.00 0.077 0.000 0.000 306.50 0.077 0.116 0.116 Device Routing Invert Outlet Devices #1 Discarded 305.00'0.200 in/hr Exfiltration over Surface area below 306.51' #2 Primary 306.00'96.0' long x 0.5' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 Coef. (English) 2.80 2.92 3.08 3.30 3.32 Discarded OutFlow Max=0.02 cfs @ 8.95 hrs HW=305.02' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.02 cfs) Primary OutFlow Max=0.80 cfs @ 12.00 hrs HW=306.02' (Free Discharge) 2=Broad-Crested Rectangular Weir (Weir Controls 0.80 cfs @ 0.40 fps) Summary for Link 2L: SN1 Inflow Area = 0.230 ac, 52.17% Impervious, Inflow Depth = 0.22" for 100-YR event Inflow = 0.10 cfs @ 12.35 hrs, Volume= 0.004 af Primary = 0.10 cfs @ 12.35 hrs, Volume= 0.004 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs