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HomeMy WebLinkAboutStormwater Report & Drainage Calcs 2-16-241S Drainage Area DA1 1P Drainage Infiltration Model Routing Diagram for 14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Subcat Reach Pond Link Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ 14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 2HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Rainfall Events Listing (selected events) Event# Event Name Storm Type Curve Mode Duration (hours) B/B Depth (inches) AMC 1 Barn Cty 2 Yr Type III 24-hr Default 24.00 1 3.39 2 2 Barn Cty 10 Yr Type III 24-hr Default 24.00 1 4.95 2 3 Barn Cty 25 Yr Type III 24-hr Default 24.00 1 5.92 2 4 Barn Cty 100 yr. Type III 24-hr Default 24.00 1 7.80 2 Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ 14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 3HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (sq-ft) CN Description (subcatchment-numbers) 20,978 98 Pavement and entire Roof Area (1S) 600 32 Woods/grass comb., Good, HSG A (1S) 21,578 96 TOTAL AREA Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ 14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 4HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Soil Listing (all nodes) Area (sq-ft) Soil Group Subcatchment Numbers 600 HSG A 1S 0 HSG B 0 HSG C 0 HSG D 20,978 Other 1S 21,578 TOTAL AREA Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ 14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 5HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Ground Covers (all nodes) HSG-A (sq-ft) HSG-B (sq-ft) HSG-C (sq-ft) HSG-D (sq-ft) Other (sq-ft) Total (sq-ft) Ground Cover 0 0 0 0 20,978 20,978 Pavement and entire Roof Area 600 0 0 0 0 600 Woods/grass comb., Good 600 0 0 0 20,978 21,578 TOTAL AREA Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ 14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 6HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Notes Listing (all nodes) Line# Node Number Notes 1 1S Time of Concentration 2 1P Standard Drainage Leach pits Storage/Infiltration Model Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 2 Yr Rainfall=3.39"14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 7HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Time span=1.00-24.00 hrs, dt=0.01 hrs, 2301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Runoff Area=21,578 sf 97.22% Impervious Runoff Depth>2.93"Subcatchment 1S: Drainage Area DA1 Tc=5.0 min CN=96 Runoff=1.64 cfs 5,277 cf Peak Elev=17.58' Storage=215 cf Inflow=1.64 cfs 5,277 cfPond 1P: Drainage Infiltration Model Outflow=1.25 cfs 5,275 cf Total Runoff Area = 21,578 sf Runoff Volume = 5,277 cf Average Runoff Depth = 2.93" 2.78% Pervious = 600 sf 97.22% Impervious = 20,978 sf Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 2 Yr Rainfall=3.39"14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 8HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA1 Time of Concentration Runoff = 1.64 cfs @ 12.07 hrs, Volume= 5,277 cf, Depth> 2.93" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs Type III 24-hr Barn Cty 2 Yr Rainfall=3.39" Area (sf) CN Description 600 32 Woods/grass comb., Good, HSG A * 20,978 98 Pavement and entire Roof Area 21,578 96 Weighted Average 600 2.78% Pervious Area 20,978 97.22% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Time Concentration Subcatchment 1S: Drainage Area DA1 Runoff Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (cfs)1 0 Type III 24-hr Barn Cty 2 Yr Rainfall=3.39" Runoff Area=21,578 sf Runoff Volume=5,277 cf Runoff Depth>2.93" Tc=5.0 min CN=96 1.64 cfs Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 2 Yr Rainfall=3.39"14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 9HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Drainage Infiltration Model Standard Drainage Leach pits Storage/Infiltration Model Inflow Area = 21,578 sf, 97.22% Impervious, Inflow Depth > 2.93" for Barn Cty 2 Yr event Inflow = 1.64 cfs @ 12.07 hrs, Volume= 5,277 cf Outflow = 1.25 cfs @ 12.13 hrs, Volume= 5,275 cf, Atten= 24%, Lag= 3.7 min Primary = 1.25 cfs @ 12.13 hrs, Volume= 5,275 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 17.58' @ 12.13 hrs Storage= 215 cf Plug-Flow detention time= 1.7 min calculated for 5,275 cf (100% of inflow) Center-of-Mass det. time= 1.5 min ( 772.5 - 771.0 ) Volume Invert Avail.Storage Storage Description #1 17.00' 3,667 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 17.00 0 18.00 368 19.00 918 20.00 1,467 21.00 2,018 22.00 2,567 23.00 3,117 24.00 3,667 Device Routing Invert Outlet Devices #1 Primary 0.00'Infiltration Model Elev. (feet) 0.00 17.00 17.30 18.00 19.00 20.00 21.00 22.00 23.00 24.00 Disch. (cfs) 0.000 0.000 1.200 1.320 1.770 2.120 2.460 2.800 3.150 3.490 Primary OutFlow Max=1.25 cfs @ 12.13 hrs HW=17.58' (Free Discharge) 1=Infiltration Model (Custom Controls 1.25 cfs) Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 2 Yr Rainfall=3.39"14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 10HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Drainage Infiltration Model Inflow Primary Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (cfs)1 0 Inflow Area=21,578 sf Peak Elev=17.58' Storage=215 cf 1.64 cfs 1.25 cfs Pond 1P: Drainage Infiltration Model Primary Stage-Discharge Discharge (cfs) 3210Elevation (feet)24 23 22 21 20 19 18 17 Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 2 Yr Rainfall=3.39"14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 11HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Drainage Infiltration Model Storage Stage-Area-Storage Storage (cubic-feet) 3,6003,4003,2003,0002,8002,6002,4002,2002,0001,8001,6001,4001,2001,0008006004002000Elevation (feet)24 23 22 21 20 19 18 17 Infiltration System Storage Model Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 10 Yr Rainfall=4.95"14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 12HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Time span=1.00-24.00 hrs, dt=0.01 hrs, 2301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Runoff Area=21,578 sf 97.22% Impervious Runoff Depth>4.48"Subcatchment 1S: Drainage Area DA1 Tc=5.0 min CN=96 Runoff=2.44 cfs 8,055 cf Peak Elev=18.35' Storage=559 cf Inflow=2.44 cfs 8,055 cfPond 1P: Drainage Infiltration Model Outflow=1.48 cfs 8,054 cf Total Runoff Area = 21,578 sf Runoff Volume = 8,055 cf Average Runoff Depth = 4.48" 2.78% Pervious = 600 sf 97.22% Impervious = 20,978 sf Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 10 Yr Rainfall=4.95"14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 13HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA1 Time of Concentration Runoff = 2.44 cfs @ 12.07 hrs, Volume= 8,055 cf, Depth> 4.48" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs Type III 24-hr Barn Cty 10 Yr Rainfall=4.95" Area (sf) CN Description 600 32 Woods/grass comb., Good, HSG A * 20,978 98 Pavement and entire Roof Area 21,578 96 Weighted Average 600 2.78% Pervious Area 20,978 97.22% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Time Concentration Subcatchment 1S: Drainage Area DA1 Runoff Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (cfs)2 1 0 Type III 24-hr Barn Cty 10 Yr Rainfall=4.95" Runoff Area=21,578 sf Runoff Volume=8,055 cf Runoff Depth>4.48" Tc=5.0 min CN=96 2.44 cfs Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 10 Yr Rainfall=4.95"14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 14HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Drainage Infiltration Model Standard Drainage Leach pits Storage/Infiltration Model Inflow Area = 21,578 sf, 97.22% Impervious, Inflow Depth > 4.48" for Barn Cty 10 Yr event Inflow = 2.44 cfs @ 12.07 hrs, Volume= 8,055 cf Outflow = 1.48 cfs @ 12.16 hrs, Volume= 8,054 cf, Atten= 40%, Lag= 5.6 min Primary = 1.48 cfs @ 12.16 hrs, Volume= 8,054 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 18.35' @ 12.16 hrs Storage= 559 cf Plug-Flow detention time= 2.4 min calculated for 8,054 cf (100% of inflow) Center-of-Mass det. time= 2.2 min ( 763.5 - 761.2 ) Volume Invert Avail.Storage Storage Description #1 17.00' 3,667 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 17.00 0 18.00 368 19.00 918 20.00 1,467 21.00 2,018 22.00 2,567 23.00 3,117 24.00 3,667 Device Routing Invert Outlet Devices #1 Primary 0.00'Infiltration Model Elev. (feet) 0.00 17.00 17.30 18.00 19.00 20.00 21.00 22.00 23.00 24.00 Disch. (cfs) 0.000 0.000 1.200 1.320 1.770 2.120 2.460 2.800 3.150 3.490 Primary OutFlow Max=1.48 cfs @ 12.16 hrs HW=18.35' (Free Discharge) 1=Infiltration Model (Custom Controls 1.48 cfs) Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 10 Yr Rainfall=4.95"14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 15HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Drainage Infiltration Model Inflow Primary Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (cfs)2 1 0 Inflow Area=21,578 sf Peak Elev=18.35' Storage=559 cf 2.44 cfs 1.48 cfs Pond 1P: Drainage Infiltration Model Primary Stage-Discharge Discharge (cfs) 3210Elevation (feet)24 23 22 21 20 19 18 17 Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 10 Yr Rainfall=4.95"14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 16HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Drainage Infiltration Model Storage Stage-Area-Storage Storage (cubic-feet) 3,6003,4003,2003,0002,8002,6002,4002,2002,0001,8001,6001,4001,2001,0008006004002000Elevation (feet)24 23 22 21 20 19 18 17 Infiltration System Storage Model Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 25 Yr Rainfall=5.92"14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 17HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Time span=1.00-24.00 hrs, dt=0.01 hrs, 2301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Runoff Area=21,578 sf 97.22% Impervious Runoff Depth>5.44"Subcatchment 1S: Drainage Area DA1 Tc=5.0 min CN=96 Runoff=2.94 cfs 9,789 cf Peak Elev=18.78' Storage=796 cf Inflow=2.94 cfs 9,789 cfPond 1P: Drainage Infiltration Model Outflow=1.67 cfs 9,787 cf Total Runoff Area = 21,578 sf Runoff Volume = 9,789 cf Average Runoff Depth = 5.44" 2.78% Pervious = 600 sf 97.22% Impervious = 20,978 sf Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 25 Yr Rainfall=5.92"14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 18HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA1 Time of Concentration Runoff = 2.94 cfs @ 12.07 hrs, Volume= 9,789 cf, Depth> 5.44" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs Type III 24-hr Barn Cty 25 Yr Rainfall=5.92" Area (sf) CN Description 600 32 Woods/grass comb., Good, HSG A * 20,978 98 Pavement and entire Roof Area 21,578 96 Weighted Average 600 2.78% Pervious Area 20,978 97.22% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Time Concentration Subcatchment 1S: Drainage Area DA1 Runoff Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (cfs)3 2 1 0 Type III 24-hr Barn Cty 25 Yr Rainfall=5.92" Runoff Area=21,578 sf Runoff Volume=9,789 cf Runoff Depth>5.44" Tc=5.0 min CN=96 2.94 cfs Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 25 Yr Rainfall=5.92"14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 19HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Drainage Infiltration Model Standard Drainage Leach pits Storage/Infiltration Model Inflow Area = 21,578 sf, 97.22% Impervious, Inflow Depth > 5.44" for Barn Cty 25 Yr event Inflow = 2.94 cfs @ 12.07 hrs, Volume= 9,789 cf Outflow = 1.67 cfs @ 12.17 hrs, Volume= 9,787 cf, Atten= 43%, Lag= 6.1 min Primary = 1.67 cfs @ 12.17 hrs, Volume= 9,787 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 18.78' @ 12.17 hrs Storage= 796 cf Plug-Flow detention time= 2.9 min calculated for 9,783 cf (100% of inflow) Center-of-Mass det. time= 2.7 min ( 759.8 - 757.1 ) Volume Invert Avail.Storage Storage Description #1 17.00' 3,667 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 17.00 0 18.00 368 19.00 918 20.00 1,467 21.00 2,018 22.00 2,567 23.00 3,117 24.00 3,667 Device Routing Invert Outlet Devices #1 Primary 0.00'Infiltration Model Elev. (feet) 0.00 17.00 17.30 18.00 19.00 20.00 21.00 22.00 23.00 24.00 Disch. (cfs) 0.000 0.000 1.200 1.320 1.770 2.120 2.460 2.800 3.150 3.490 Primary OutFlow Max=1.67 cfs @ 12.17 hrs HW=18.78' (Free Discharge) 1=Infiltration Model (Custom Controls 1.67 cfs) Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 25 Yr Rainfall=5.92"14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 20HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Drainage Infiltration Model Inflow Primary Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (cfs)3 2 1 0 Inflow Area=21,578 sf Peak Elev=18.78' Storage=796 cf 2.94 cfs 1.67 cfs Pond 1P: Drainage Infiltration Model Primary Stage-Discharge Discharge (cfs) 3210Elevation (feet)24 23 22 21 20 19 18 17 Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 25 Yr Rainfall=5.92"14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 21HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Drainage Infiltration Model Storage Stage-Area-Storage Storage (cubic-feet) 3,6003,4003,2003,0002,8002,6002,4002,2002,0001,8001,6001,4001,2001,0008006004002000Elevation (feet)24 23 22 21 20 19 18 17 Infiltration System Storage Model Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr. Rainfall=7.80"14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 22HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Time span=1.00-24.00 hrs, dt=0.01 hrs, 2301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Runoff Area=21,578 sf 97.22% Impervious Runoff Depth>7.32"Subcatchment 1S: Drainage Area DA1 Tc=5.0 min CN=96 Runoff=3.90 cfs 13,156 cf Peak Elev=19.75' Storage=1,328 cf Inflow=3.90 cfs 13,156 cfPond 1P: Drainage Infiltration Model Outflow=2.03 cfs 13,153 cf Total Runoff Area = 21,578 sf Runoff Volume = 13,156 cf Average Runoff Depth = 7.32" 2.78% Pervious = 600 sf 97.22% Impervious = 20,978 sf Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr. Rainfall=7.80"14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 23HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA1 Time of Concentration Runoff = 3.90 cfs @ 12.07 hrs, Volume= 13,156 cf, Depth> 7.32" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs Type III 24-hr Barn Cty 100 yr. Rainfall=7.80" Area (sf) CN Description 600 32 Woods/grass comb., Good, HSG A * 20,978 98 Pavement and entire Roof Area 21,578 96 Weighted Average 600 2.78% Pervious Area 20,978 97.22% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Time Concentration Subcatchment 1S: Drainage Area DA1 Runoff Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (cfs)4 3 2 1 0 Type III 24-hr Barn Cty 100 yr. Rainfall=7.80" Runoff Area=21,578 sf Runoff Volume=13,156 cf Runoff Depth>7.32" Tc=5.0 min CN=96 3.90 cfs Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr. Rainfall=7.80"14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 24HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Drainage Infiltration Model Standard Drainage Leach pits Storage/Infiltration Model Inflow Area = 21,578 sf, 97.22% Impervious, Inflow Depth > 7.32" for Barn Cty 100 yr. event Inflow = 3.90 cfs @ 12.07 hrs, Volume= 13,156 cf Outflow = 2.03 cfs @ 12.19 hrs, Volume= 13,153 cf, Atten= 48%, Lag= 7.0 min Primary = 2.03 cfs @ 12.19 hrs, Volume= 13,153 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 19.75' @ 12.19 hrs Storage= 1,328 cf Plug-Flow detention time= 3.8 min calculated for 13,147 cf (100% of inflow) Center-of-Mass det. time= 3.6 min ( 755.1 - 751.5 ) Volume Invert Avail.Storage Storage Description #1 17.00' 3,667 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 17.00 0 18.00 368 19.00 918 20.00 1,467 21.00 2,018 22.00 2,567 23.00 3,117 24.00 3,667 Device Routing Invert Outlet Devices #1 Primary 0.00'Infiltration Model Elev. (feet) 0.00 17.00 17.30 18.00 19.00 20.00 21.00 22.00 23.00 24.00 Disch. (cfs) 0.000 0.000 1.200 1.320 1.770 2.120 2.460 2.800 3.150 3.490 Primary OutFlow Max=2.03 cfs @ 12.19 hrs HW=19.75' (Free Discharge) 1=Infiltration Model (Custom Controls 2.03 cfs) Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr. Rainfall=7.80"14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 25HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Drainage Infiltration Model Inflow Primary Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (cfs)4 3 2 1 0 Inflow Area=21,578 sf Peak Elev=19.75' Storage=1,328 cf 3.90 cfs 2.03 cfs Pond 1P: Drainage Infiltration Model Primary Stage-Discharge Discharge (cfs) 3210Elevation (feet)24 23 22 21 20 19 18 17 Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr. Rainfall=7.80"14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. Page 26HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Drainage Infiltration Model Storage Stage-Area-Storage Storage (cubic-feet) 3,6003,4003,2003,0002,8002,6002,4002,2002,0001,8001,6001,4001,2001,0008006004002000Elevation (feet)24 23 22 21 20 19 18 17 Infiltration System Storage Model Dockside DA1 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Table of Contents14-176 DOCKSIDE DA1 Prepared by down cape engineering, inc. HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC TABLE OF CONTENTS Project Reports 1 Routing Diagram 2 Rainfall Events Listing (selected events) 3 Area Listing (all nodes) 4 Soil Listing (all nodes) 5 Ground Covers (all nodes) 6 Notes Listing (all nodes) Barn Cty 2 Yr Event 7 Node Listing 8 Subcat 1S: Drainage Area DA1 9 Pond 1P: Drainage Infiltration Model Barn Cty 10 Yr Event 12 Node Listing 13 Subcat 1S: Drainage Area DA1 14 Pond 1P: Drainage Infiltration Model Barn Cty 25 Yr Event 17 Node Listing 18 Subcat 1S: Drainage Area DA1 19 Pond 1P: Drainage Infiltration Model Barn Cty 100 yr. Event 22 Node Listing 23 Subcat 1S: Drainage Area DA1 24 Pond 1P: Drainage Infiltration Model 1S Drainage Area DA2 1P Drainage Infiltration Model Routing Diagram for 14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Subcat Reach Pond Link Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ 14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 2HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Rainfall Events Listing (selected events) Event# Event Name Storm Type Curve Mode Duration (hours) B/B Depth (inches) AMC 1 Barn Cty 2 Yr Type III 24-hr Default 24.00 1 3.39 2 2 Barn Cty 10 Yr Type III 24-hr Default 24.00 1 4.95 2 3 Barn Cty 25 Yr Type III 24-hr Default 24.00 1 5.92 2 4 Barn Cty 100 yr. Type III 24-hr Default 24.00 1 7.80 2 Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ 14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 3HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (sq-ft) CN Description (subcatchment-numbers) 18,886 98 Pavement and entire Roof Area (1S) 1,100 32 Woods/grass comb., Good, HSG A (1S) 19,986 94 TOTAL AREA Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ 14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 4HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Soil Listing (all nodes) Area (sq-ft) Soil Group Subcatchment Numbers 1,100 HSG A 1S 0 HSG B 0 HSG C 0 HSG D 18,886 Other 1S 19,986 TOTAL AREA Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ 14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 5HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Ground Covers (all nodes) HSG-A (sq-ft) HSG-B (sq-ft) HSG-C (sq-ft) HSG-D (sq-ft) Other (sq-ft) Total (sq-ft) Ground Cover 0 0 0 0 18,886 18,886 Pavement and entire Roof Area 1,100 0 0 0 0 1,100 Woods/grass comb., Good 1,100 0 0 0 18,886 19,986 TOTAL AREA Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ 14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 6HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Notes Listing (all nodes) Line# Node Number Notes 1 1S Time of Concentration 2 1P Standard Drainage Leach pits Storage/Infiltration Model Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 2 Yr Rainfall=3.39"14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 7HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Time span=1.00-24.00 hrs, dt=0.01 hrs, 2301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Runoff Area=19,986 sf 94.50% Impervious Runoff Depth>2.73"Subcatchment 1S: Drainage Area DA2 Tc=5.0 min CN=94 Runoff=1.45 cfs 4,541 cf Peak Elev=16.43' Storage=371 cf Inflow=1.45 cfs 4,541 cfPond 1P: Drainage Infiltration Model Outflow=0.84 cfs 4,540 cf Total Runoff Area = 19,986 sf Runoff Volume = 4,541 cf Average Runoff Depth = 2.73" 5.50% Pervious = 1,100 sf 94.50% Impervious = 18,886 sf Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 2 Yr Rainfall=3.39"14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 8HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA2 Time of Concentration Runoff = 1.45 cfs @ 12.07 hrs, Volume= 4,541 cf, Depth> 2.73" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs Type III 24-hr Barn Cty 2 Yr Rainfall=3.39" Area (sf) CN Description 1,100 32 Woods/grass comb., Good, HSG A * 18,886 98 Pavement and entire Roof Area 19,986 94 Weighted Average 1,100 5.50% Pervious Area 18,886 94.50% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Time Concentration Subcatchment 1S: Drainage Area DA2 Runoff Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (cfs)1 0 Type III 24-hr Barn Cty 2 Yr Rainfall=3.39" Runoff Area=19,986 sf Runoff Volume=4,541 cf Runoff Depth>2.73" Tc=5.0 min CN=94 1.45 cfs Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 2 Yr Rainfall=3.39"14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 9HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Drainage Infiltration Model Standard Drainage Leach pits Storage/Infiltration Model Inflow Area = 19,986 sf, 94.50% Impervious, Inflow Depth > 2.73" for Barn Cty 2 Yr event Inflow = 1.45 cfs @ 12.07 hrs, Volume= 4,541 cf Outflow = 0.84 cfs @ 12.17 hrs, Volume= 4,540 cf, Atten= 42%, Lag= 6.1 min Primary = 0.84 cfs @ 12.17 hrs, Volume= 4,540 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 16.43' @ 12.17 hrs Storage= 371 cf Plug-Flow detention time= 2.6 min calculated for 4,540 cf (100% of inflow) Center-of-Mass det. time= 2.4 min ( 786.3 - 783.8 ) Volume Invert Avail.Storage Storage Description #1 15.00' 2,258 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 15.00 0 16.00 227 17.00 565 18.00 904 19.00 1,241 20.00 1,581 21.00 1,920 22.00 2,258 Device Routing Invert Outlet Devices #1 Primary 0.00'Infiltration Model Elev. (feet) 0.00 15.00 15.20 16.00 17.00 18.00 19.00 20.00 21.00 22.00 Disch. (cfs) 0.000 0.000 0.610 0.700 1.020 1.270 1.510 1.760 2.000 2.250 Primary OutFlow Max=0.84 cfs @ 12.17 hrs HW=16.43' (Free Discharge) 1=Infiltration Model (Custom Controls 0.84 cfs) Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 2 Yr Rainfall=3.39"14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 10HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Drainage Infiltration Model Inflow Primary Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (cfs)1 0 Inflow Area=19,986 sf Peak Elev=16.43' Storage=371 cf 1.45 cfs 0.84 cfs Pond 1P: Drainage Infiltration Model Primary Stage-Discharge Discharge (cfs) 210Elevation (feet)22 21 20 19 18 17 16 15 Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 2 Yr Rainfall=3.39"14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 11HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Drainage Infiltration Model Storage Stage-Area-Storage Storage (cubic-feet) 2,2002,0001,8001,6001,4001,2001,0008006004002000Elevation (feet)22 21 20 19 18 17 16 15 Infiltration System Storage Model Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 10 Yr Rainfall=4.95"14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 12HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Time span=1.00-24.00 hrs, dt=0.01 hrs, 2301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Runoff Area=19,986 sf 94.50% Impervious Runoff Depth>4.26"Subcatchment 1S: Drainage Area DA2 Tc=5.0 min CN=94 Runoff=2.21 cfs 7,088 cf Peak Elev=17.61' Storage=771 cf Inflow=2.21 cfs 7,088 cfPond 1P: Drainage Infiltration Model Outflow=1.17 cfs 7,086 cf Total Runoff Area = 19,986 sf Runoff Volume = 7,088 cf Average Runoff Depth = 4.26" 5.50% Pervious = 1,100 sf 94.50% Impervious = 18,886 sf Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 10 Yr Rainfall=4.95"14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 13HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA2 Time of Concentration Runoff = 2.21 cfs @ 12.07 hrs, Volume= 7,088 cf, Depth> 4.26" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs Type III 24-hr Barn Cty 10 Yr Rainfall=4.95" Area (sf) CN Description 1,100 32 Woods/grass comb., Good, HSG A * 18,886 98 Pavement and entire Roof Area 19,986 94 Weighted Average 1,100 5.50% Pervious Area 18,886 94.50% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Time Concentration Subcatchment 1S: Drainage Area DA2 Runoff Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (cfs)2 1 0 Type III 24-hr Barn Cty 10 Yr Rainfall=4.95" Runoff Area=19,986 sf Runoff Volume=7,088 cf Runoff Depth>4.26" Tc=5.0 min CN=94 2.21 cfs Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 10 Yr Rainfall=4.95"14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 14HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Drainage Infiltration Model Standard Drainage Leach pits Storage/Infiltration Model Inflow Area = 19,986 sf, 94.50% Impervious, Inflow Depth > 4.26" for Barn Cty 10 Yr event Inflow = 2.21 cfs @ 12.07 hrs, Volume= 7,088 cf Outflow = 1.17 cfs @ 12.18 hrs, Volume= 7,086 cf, Atten= 47%, Lag= 6.9 min Primary = 1.17 cfs @ 12.18 hrs, Volume= 7,086 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 17.61' @ 12.18 hrs Storage= 771 cf Plug-Flow detention time= 3.9 min calculated for 7,086 cf (100% of inflow) Center-of-Mass det. time= 3.8 min ( 776.1 - 772.4 ) Volume Invert Avail.Storage Storage Description #1 15.00' 2,258 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 15.00 0 16.00 227 17.00 565 18.00 904 19.00 1,241 20.00 1,581 21.00 1,920 22.00 2,258 Device Routing Invert Outlet Devices #1 Primary 0.00'Infiltration Model Elev. (feet) 0.00 15.00 15.20 16.00 17.00 18.00 19.00 20.00 21.00 22.00 Disch. (cfs) 0.000 0.000 0.610 0.700 1.020 1.270 1.510 1.760 2.000 2.250 Primary OutFlow Max=1.17 cfs @ 12.18 hrs HW=17.61' (Free Discharge) 1=Infiltration Model (Custom Controls 1.17 cfs) Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 10 Yr Rainfall=4.95"14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 15HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Drainage Infiltration Model Inflow Primary Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (cfs)2 1 0 Inflow Area=19,986 sf Peak Elev=17.61' Storage=771 cf 2.21 cfs 1.17 cfs Pond 1P: Drainage Infiltration Model Primary Stage-Discharge Discharge (cfs) 210Elevation (feet)22 21 20 19 18 17 16 15 Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 10 Yr Rainfall=4.95"14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 16HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Drainage Infiltration Model Storage Stage-Area-Storage Storage (cubic-feet) 2,2002,0001,8001,6001,4001,2001,0008006004002000Elevation (feet)22 21 20 19 18 17 16 15 Infiltration System Storage Model Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 25 Yr Rainfall=5.92"14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 17HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Time span=1.00-24.00 hrs, dt=0.01 hrs, 2301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Runoff Area=19,986 sf 94.50% Impervious Runoff Depth>5.21"Subcatchment 1S: Drainage Area DA2 Tc=5.0 min CN=94 Runoff=2.67 cfs 8,684 cf Peak Elev=18.42' Storage=1,046 cf Inflow=2.67 cfs 8,684 cfPond 1P: Drainage Infiltration Model Outflow=1.37 cfs 8,682 cf Total Runoff Area = 19,986 sf Runoff Volume = 8,684 cf Average Runoff Depth = 5.21" 5.50% Pervious = 1,100 sf 94.50% Impervious = 18,886 sf Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 25 Yr Rainfall=5.92"14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 18HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA2 Time of Concentration Runoff = 2.67 cfs @ 12.07 hrs, Volume= 8,684 cf, Depth> 5.21" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs Type III 24-hr Barn Cty 25 Yr Rainfall=5.92" Area (sf) CN Description 1,100 32 Woods/grass comb., Good, HSG A * 18,886 98 Pavement and entire Roof Area 19,986 94 Weighted Average 1,100 5.50% Pervious Area 18,886 94.50% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Time Concentration Subcatchment 1S: Drainage Area DA2 Runoff Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (cfs)2 1 0 Type III 24-hr Barn Cty 25 Yr Rainfall=5.92" Runoff Area=19,986 sf Runoff Volume=8,684 cf Runoff Depth>5.21" Tc=5.0 min CN=94 2.67 cfs Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 25 Yr Rainfall=5.92"14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 19HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Drainage Infiltration Model Standard Drainage Leach pits Storage/Infiltration Model Inflow Area = 19,986 sf, 94.50% Impervious, Inflow Depth > 5.21" for Barn Cty 25 Yr event Inflow = 2.67 cfs @ 12.07 hrs, Volume= 8,684 cf Outflow = 1.37 cfs @ 12.19 hrs, Volume= 8,682 cf, Atten= 49%, Lag= 7.3 min Primary = 1.37 cfs @ 12.19 hrs, Volume= 8,682 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 18.42' @ 12.19 hrs Storage= 1,046 cf Plug-Flow detention time= 4.7 min calculated for 8,678 cf (100% of inflow) Center-of-Mass det. time= 4.5 min ( 772.0 - 767.5 ) Volume Invert Avail.Storage Storage Description #1 15.00' 2,258 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 15.00 0 16.00 227 17.00 565 18.00 904 19.00 1,241 20.00 1,581 21.00 1,920 22.00 2,258 Device Routing Invert Outlet Devices #1 Primary 0.00'Infiltration Model Elev. (feet) 0.00 15.00 15.20 16.00 17.00 18.00 19.00 20.00 21.00 22.00 Disch. (cfs) 0.000 0.000 0.610 0.700 1.020 1.270 1.510 1.760 2.000 2.250 Primary OutFlow Max=1.37 cfs @ 12.19 hrs HW=18.42' (Free Discharge) 1=Infiltration Model (Custom Controls 1.37 cfs) Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 25 Yr Rainfall=5.92"14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 20HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Drainage Infiltration Model Inflow Primary Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (cfs)2 1 0 Inflow Area=19,986 sf Peak Elev=18.42' Storage=1,046 cf 2.67 cfs 1.37 cfs Pond 1P: Drainage Infiltration Model Primary Stage-Discharge Discharge (cfs) 210Elevation (feet)22 21 20 19 18 17 16 15 Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 25 Yr Rainfall=5.92"14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 21HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Drainage Infiltration Model Storage Stage-Area-Storage Storage (cubic-feet) 2,2002,0001,8001,6001,4001,2001,0008006004002000Elevation (feet)22 21 20 19 18 17 16 15 Infiltration System Storage Model Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr. Rainfall=7.80"14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 22HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Time span=1.00-24.00 hrs, dt=0.01 hrs, 2301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Runoff Area=19,986 sf 94.50% Impervious Runoff Depth>7.08"Subcatchment 1S: Drainage Area DA2 Tc=5.0 min CN=94 Runoff=3.57 cfs 11,789 cf Peak Elev=20.03' Storage=1,590 cf Inflow=3.57 cfs 11,789 cfPond 1P: Drainage Infiltration Model Outflow=1.77 cfs 11,787 cf Total Runoff Area = 19,986 sf Runoff Volume = 11,789 cf Average Runoff Depth = 7.08" 5.50% Pervious = 1,100 sf 94.50% Impervious = 18,886 sf Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr. Rainfall=7.80"14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 23HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA2 Time of Concentration Runoff = 3.57 cfs @ 12.07 hrs, Volume= 11,789 cf, Depth> 7.08" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs Type III 24-hr Barn Cty 100 yr. Rainfall=7.80" Area (sf) CN Description 1,100 32 Woods/grass comb., Good, HSG A * 18,886 98 Pavement and entire Roof Area 19,986 94 Weighted Average 1,100 5.50% Pervious Area 18,886 94.50% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Time Concentration Subcatchment 1S: Drainage Area DA2 Runoff Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (cfs)3 2 1 0 Type III 24-hr Barn Cty 100 yr. Rainfall=7.80" Runoff Area=19,986 sf Runoff Volume=11,789 cf Runoff Depth>7.08" Tc=5.0 min CN=94 3.57 cfs Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr. Rainfall=7.80"14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 24HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Drainage Infiltration Model Standard Drainage Leach pits Storage/Infiltration Model Inflow Area = 19,986 sf, 94.50% Impervious, Inflow Depth > 7.08" for Barn Cty 100 yr. event Inflow = 3.57 cfs @ 12.07 hrs, Volume= 11,789 cf Outflow = 1.77 cfs @ 12.20 hrs, Volume= 11,787 cf, Atten= 51%, Lag= 7.7 min Primary = 1.77 cfs @ 12.20 hrs, Volume= 11,787 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 20.03' @ 12.20 hrs Storage= 1,590 cf Plug-Flow detention time= 5.8 min calculated for 11,782 cf (100% of inflow) Center-of-Mass det. time= 5.6 min ( 766.2 - 760.6 ) Volume Invert Avail.Storage Storage Description #1 15.00' 2,258 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 15.00 0 16.00 227 17.00 565 18.00 904 19.00 1,241 20.00 1,581 21.00 1,920 22.00 2,258 Device Routing Invert Outlet Devices #1 Primary 0.00'Infiltration Model Elev. (feet) 0.00 15.00 15.20 16.00 17.00 18.00 19.00 20.00 21.00 22.00 Disch. (cfs) 0.000 0.000 0.610 0.700 1.020 1.270 1.510 1.760 2.000 2.250 Primary OutFlow Max=1.77 cfs @ 12.20 hrs HW=20.03' (Free Discharge) 1=Infiltration Model (Custom Controls 1.77 cfs) Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr. Rainfall=7.80"14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 25HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Drainage Infiltration Model Inflow Primary Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (cfs)3 2 1 0 Inflow Area=19,986 sf Peak Elev=20.03' Storage=1,590 cf 3.57 cfs 1.77 cfs Pond 1P: Drainage Infiltration Model Primary Stage-Discharge Discharge (cfs) 210Elevation (feet)22 21 20 19 18 17 16 15 Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr. Rainfall=7.80"14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. Page 26HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Drainage Infiltration Model Storage Stage-Area-Storage Storage (cubic-feet) 2,2002,0001,8001,6001,4001,2001,0008006004002000Elevation (feet)22 21 20 19 18 17 16 15 Infiltration System Storage Model Dockside DA2 ProposedC:\Users\Public\Documents\HydroCAD\Projects\ Table of Contents14-176 DOCKSIDE DA2 Prepared by down cape engineering, inc. HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC TABLE OF CONTENTS Project Reports 1 Routing Diagram 2 Rainfall Events Listing (selected events) 3 Area Listing (all nodes) 4 Soil Listing (all nodes) 5 Ground Covers (all nodes) 6 Notes Listing (all nodes) Barn Cty 2 Yr Event 7 Node Listing 8 Subcat 1S: Drainage Area DA2 9 Pond 1P: Drainage Infiltration Model Barn Cty 10 Yr Event 12 Node Listing 13 Subcat 1S: Drainage Area DA2 14 Pond 1P: Drainage Infiltration Model Barn Cty 25 Yr Event 17 Node Listing 18 Subcat 1S: Drainage Area DA2 19 Pond 1P: Drainage Infiltration Model Barn Cty 100 yr. Event 22 Node Listing 23 Subcat 1S: Drainage Area DA2 24 Pond 1P: Drainage Infiltration Model 1S Drainage Area DA1 Existing Routing Diagram for 14-176 DOCKSIDE DA1 EXISTING Prepared by down cape engineering, inc. HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Subcat Reach Pond Link Dockside DA1 ExistingC:\Users\Public\Documents\HydroCAD\Projects\ 14-176 DOCKSIDE DA1 EXISTING Prepared by down cape engineering, inc. Page 2HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Rainfall Events Listing (selected events) Event# Event Name Storm Type Curve Mode Duration (hours) B/B Depth (inches) AMC 1 Barn Cty 100 yr. Type III 24-hr Default 24.00 1 7.80 2 Dockside DA1 ExistingC:\Users\Public\Documents\HydroCAD\Projects\ 14-176 DOCKSIDE DA1 EXISTING Prepared by down cape engineering, inc. Page 3HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (sq-ft) CN Description (subcatchment-numbers) 25,691 98 Pavement and Roof Area (1S) 650 32 Woods/grass comb., Good, HSG A (1S) 26,341 96 TOTAL AREA Dockside DA1 ExistingC:\Users\Public\Documents\HydroCAD\Projects\ 14-176 DOCKSIDE DA1 EXISTING Prepared by down cape engineering, inc. Page 4HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Soil Listing (all nodes) Area (sq-ft) Soil Group Subcatchment Numbers 650 HSG A 1S 0 HSG B 0 HSG C 0 HSG D 25,691 Other 1S 26,341 TOTAL AREA Dockside DA1 ExistingC:\Users\Public\Documents\HydroCAD\Projects\ 14-176 DOCKSIDE DA1 EXISTING Prepared by down cape engineering, inc. Page 5HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Ground Covers (all nodes) HSG-A (sq-ft) HSG-B (sq-ft) HSG-C (sq-ft) HSG-D (sq-ft) Other (sq-ft) Total (sq-ft) Ground Cover Subcatchment Numbers 0 0 0 0 25,691 25,691 Pavement and Roof Area 650 0 0 0 0 650 Woods/grass comb., Good 650 0 0 0 25,691 26,341 TOTAL AREA Dockside DA1 ExistingC:\Users\Public\Documents\HydroCAD\Projects\ 14-176 DOCKSIDE DA1 EXISTING Prepared by down cape engineering, inc. Page 6HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Notes Listing (all nodes) Line# Node Number Notes 1 1S Time of Concentration Dockside DA1 ExistingC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr. Rainfall=7.80"14-176 DOCKSIDE DA1 EXISTING Prepared by down cape engineering, inc. Page 7HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Time span=1.00-24.00 hrs, dt=0.01 hrs, 2301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Runoff Area=26,341 sf 97.53% Impervious Runoff Depth>7.32"Subcatchment 1S: Drainage Area DA1 Tc=5.0 min CN=96 Runoff=4.76 cfs 16,060 cf Total Runoff Area = 26,341 sf Runoff Volume = 16,060 cf Average Runoff Depth = 7.32" 2.47% Pervious = 650 sf 97.53% Impervious = 25,691 sf Dockside DA1 ExistingC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr. Rainfall=7.80"14-176 DOCKSIDE DA1 EXISTING Prepared by down cape engineering, inc. Page 8HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA1 Existing Time of Concentration Runoff = 4.76 cfs @ 12.07 hrs, Volume= 16,060 cf, Depth> 7.32" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs Type III 24-hr Barn Cty 100 yr. Rainfall=7.80" Area (sf) CN Description 650 32 Woods/grass comb., Good, HSG A * 25,691 98 Pavement and Roof Area 26,341 96 Weighted Average 650 2.47% Pervious Area 25,691 97.53% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Time Concentration Subcatchment 1S: Drainage Area DA1 Existing Runoff Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (cfs)5 4 3 2 1 0 Type III 24-hr Barn Cty 100 yr. Rainfall=7.80" Runoff Area=26,341 sf Runoff Volume=16,060 cf Runoff Depth>7.32" Tc=5.0 min CN=96 4.76 cfs Dockside DA1 ExistingC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr. Rainfall=7.80"14-176 DOCKSIDE DA1 EXISTING Prepared by down cape engineering, inc. Page 9HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Drainage Area DA1 Existing Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 1.00 0.08 0.00 0.00 1.50 0.12 0.00 0.01 2.00 0.16 0.01 0.01 2.50 0.20 0.02 0.02 3.00 0.24 0.04 0.02 3.50 0.29 0.07 0.03 4.00 0.34 0.10 0.04 4.50 0.39 0.13 0.04 5.00 0.44 0.17 0.05 5.50 0.50 0.21 0.05 6.00 0.56 0.26 0.06 6.50 0.63 0.31 0.07 7.00 0.71 0.37 0.08 7.50 0.79 0.45 0.09 8.00 0.89 0.53 0.11 8.50 1.00 0.63 0.13 9.00 1.14 0.75 0.16 9.50 1.29 0.90 0.19 10.00 1.47 1.07 0.22 10.50 1.69 1.27 0.27 11.00 1.95 1.53 0.33 11.50 2.32 1.89 0.52 12.00 3.90 3.44 3.22 12.50 5.48 5.01 0.88 13.00 5.85 5.38 0.38 13.50 6.11 5.64 0.30 14.00 6.33 5.85 0.24 14.50 6.51 6.03 0.21 15.00 6.66 6.19 0.18 15.50 6.80 6.32 0.15 16.00 6.91 6.43 0.13 16.50 7.01 6.53 0.11 17.00 7.09 6.62 0.10 17.50 7.17 6.69 0.09 18.00 7.24 6.76 0.08 18.50 7.30 6.82 0.07 19.00 7.36 6.88 0.07 19.50 7.41 6.93 0.07 20.00 7.46 6.99 0.06 20.50 7.51 7.04 0.06 21.00 7.56 7.08 0.06 21.50 7.61 7.13 0.05 22.00 7.65 7.17 0.05 22.50 7.69 7.21 0.05 23.00 7.73 7.25 0.05 23.50 7.77 7.29 0.04 24.00 7.80 7.32 0.04 Dockside DA1 ExistingC:\Users\Public\Documents\HydroCAD\Projects\ Table of Contents14-176 DOCKSIDE DA1 EXISTING Prepared by down cape engineering, inc. HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC TABLE OF CONTENTS Project Reports 1 Routing Diagram 2 Rainfall Events Listing (selected events) 3 Area Listing (all nodes) 4 Soil Listing (all nodes) 5 Ground Covers (all nodes) 6 Notes Listing (all nodes) Barn Cty 100 yr. Event 7 Node Listing 8 Subcat 1S: Drainage Area DA1 Existing 1S Drainage Area DA2 EXISTING Routing Diagram for 14-176 DOCKSIDE DA2 EXISTING Prepared by down cape engineering, inc. HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Subcat Reach Pond Link Dockside DA2 ExistingC:\Users\Public\Documents\HydroCAD\Projects\ 14-176 DOCKSIDE DA2 EXISTING Prepared by down cape engineering, inc. Page 2HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Rainfall Events Listing (selected events) Event# Event Name Storm Type Curve Mode Duration (hours) B/B Depth (inches) AMC 1 Barn Cty 100 yr. Type III 24-hr Default 24.00 1 7.80 2 Dockside DA2 ExistingC:\Users\Public\Documents\HydroCAD\Projects\ 14-176 DOCKSIDE DA2 EXISTING Prepared by down cape engineering, inc. Page 3HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (sq-ft) CN Description (subcatchment-numbers) 24,429 70 Gravel parking area/shrubs (1S) 800 32 Woods/grass comb., Good, HSG A (1S) 25,229 69 TOTAL AREA Dockside DA2 ExistingC:\Users\Public\Documents\HydroCAD\Projects\ 14-176 DOCKSIDE DA2 EXISTING Prepared by down cape engineering, inc. Page 4HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Soil Listing (all nodes) Area (sq-ft) Soil Group Subcatchment Numbers 800 HSG A 1S 0 HSG B 0 HSG C 0 HSG D 24,429 Other 1S 25,229 TOTAL AREA Dockside DA2 ExistingC:\Users\Public\Documents\HydroCAD\Projects\ 14-176 DOCKSIDE DA2 EXISTING Prepared by down cape engineering, inc. Page 5HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Ground Covers (all nodes) HSG-A (sq-ft) HSG-B (sq-ft) HSG-C (sq-ft) HSG-D (sq-ft) Other (sq-ft) Total (sq-ft) Ground Cover Subcatchment Numbers 0 0 0 0 24,429 24,429 Gravel parking area/shrubs 800 0 0 0 0 800 Woods/grass comb., Good 800 0 0 0 24,429 25,229 TOTAL AREA Dockside DA2 ExistingC:\Users\Public\Documents\HydroCAD\Projects\ 14-176 DOCKSIDE DA2 EXISTING Prepared by down cape engineering, inc. Page 6HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Notes Listing (all nodes) Line# Node Number Notes 1 1S Time of Concentration Dockside DA2 ExistingC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr. Rainfall=7.80"14-176 DOCKSIDE DA2 EXISTING Prepared by down cape engineering, inc. Page 7HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Time span=1.00-24.00 hrs, dt=0.01 hrs, 2301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Runoff Area=25,229 sf 0.00% Impervious Runoff Depth>4.18"Subcatchment 1S: Drainage Area DA2 Tc=5.0 min CN=69 Runoff=2.94 cfs 8,780 cf Total Runoff Area = 25,229 sf Runoff Volume = 8,780 cf Average Runoff Depth = 4.18" 100.00% Pervious = 25,229 sf 0.00% Impervious = 0 sf Dockside DA2 ExistingC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr. Rainfall=7.80"14-176 DOCKSIDE DA2 EXISTING Prepared by down cape engineering, inc. Page 8HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA2 EXISTING Time of Concentration Runoff = 2.94 cfs @ 12.08 hrs, Volume= 8,780 cf, Depth> 4.18" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs Type III 24-hr Barn Cty 100 yr. Rainfall=7.80" Area (sf) CN Description 800 32 Woods/grass comb., Good, HSG A * 24,429 70 Gravel parking area/shrubs 25,229 69 Weighted Average 25,229 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Time Concentration Subcatchment 1S: Drainage Area DA2 EXISTING Runoff Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (cfs)3 2 1 0 Type III 24-hr Barn Cty 100 yr. Rainfall=7.80" Runoff Area=25,229 sf Runoff Volume=8,780 cf Runoff Depth>4.18" Tc=5.0 min CN=69 2.94 cfs Dockside DA2 ExistingC:\Users\Public\Documents\HydroCAD\Projects\ Table of Contents14-176 DOCKSIDE DA2 EXISTING Prepared by down cape engineering, inc. HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC TABLE OF CONTENTS Project Reports 1 Routing Diagram 2 Rainfall Events Listing (selected events) 3 Area Listing (all nodes) 4 Soil Listing (all nodes) 5 Ground Covers (all nodes) 6 Notes Listing (all nodes) Barn Cty 100 yr. Event 7 Node Listing 8 Subcat 1S: Drainage Area DA2 EXISTING