Loading...
HomeMy WebLinkAboutStormwater Supplemental Information 7.7.20221S Drainage Area DA1 EX 1P Low area drainage catchment Routing Diagram for 150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Subcat Reach Pond Link EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ 150 SOUTH ST EX 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 10 Yr Type III 24-hr Default 24.00 1 4.95 2 2 Barn Cty 100 yr Type III 24-hr Default 24.00 1 7.80 2 3 Barn Cty 2 Yr Type III 24-hr Default 24.00 1 3.39 2 4 Barn Cty 25 Yr Type III 24-hr Default 24.00 1 5.92 2 5 Barn Cty 5 Yr Type III 24-hr Default 24.00 1 4.24 2 6 Barn Cty 50 yr. Type III 24-hr Default 24.00 1 6.65 2 EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ 150 SOUTH ST EX 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) 3,273 98 Roof area (1S) 89,721 32 Woods/grass comb., Good, HSG A (1S) 11,671 75 compacted dirt/gravel drive (1S) 104,665 39 TOTAL AREA EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ 150 SOUTH ST EX 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 89,721 HSG A 1S 0 HSG B 0 HSG C 0 HSG D 14,944 Other 1S 104,665 TOTAL AREA EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ 150 SOUTH ST EX 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 Subcatchment Numbers 0 0 0 0 3,273 3,273 Roof area 89,721 0 0 0 0 89,721 Woods/grass comb., Good 0 0 0 0 11,671 11,671 compacted dirt/gravel drive 89,721 0 0 0 14,944 104,665 TOTAL AREA EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 10 Yr Rainfall=4.95"150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. Page 6HydroCAD® 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=104,665 sf 3.13% Impervious Runoff Depth>0.19"Subcatchment 1S: Drainage Area DA1 EX Tc=5.0 min CN=39 Runoff=0.08 cfs 1,652 cf Peak Elev=4.03' Storage=414 cf Inflow=0.08 cfs 1,652 cfPond 1P: Low area drainage catchment Outflow=0.04 cfs 1,426 cf Total Runoff Area = 104,665 sf Runoff Volume = 1,652 cf Average Runoff Depth = 0.19" 96.87% Pervious = 101,392 sf 3.13% Impervious = 3,273 sf EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 10 Yr Rainfall=4.95"150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. Page 7HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA1 EX Time of Concentration Runoff = 0.08 cfs @ 12.47 hrs, Volume= 1,652 cf, Depth> 0.19" 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 89,721 32 Woods/grass comb., Good, HSG A * 3,273 98 Roof area * 11,671 75 compacted dirt/gravel drive 104,665 39 Weighted Average 101,392 96.87% Pervious Area 3,273 3.13% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Time Concentration EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 10 Yr Rainfall=4.95"150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. Page 8HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Low area drainage catchment Low drainage area 3"/hr infiltration rate model Inflow Area = 104,665 sf, 3.13% Impervious, Inflow Depth > 0.19" for Barn Cty 10 Yr event Inflow = 0.08 cfs @ 12.47 hrs, Volume= 1,652 cf Outflow = 0.04 cfs @ 16.56 hrs, Volume= 1,426 cf, Atten= 47%, Lag= 245.1 min Primary = 0.04 cfs @ 16.56 hrs, Volume= 1,426 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 4.03' @ 16.56 hrs Storage= 414 cf Plug-Flow detention time= 139.9 min calculated for 1,426 cf (86% of inflow) Center-of-Mass det. time= 85.2 min ( 1,096.8 - 1,011.6 ) Volume Invert Avail.Storage Storage Description #1 4.00' 25,837 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 4.00 0 5.00 12,837 5.50 25,837 Device Routing Invert Outlet Devices #1 Primary 0.00'Infiltration Model Elev. (feet) 0.00 4.00 4.10 5.00 5.50 Disch. (cfs) 0.000 0.010 0.110 1.670 2.300 Primary OutFlow Max=0.04 cfs @ 16.56 hrs HW=4.03' (Free Discharge) 1=Infiltration Model (Custom Controls 0.04 cfs) EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 10 Yr Rainfall=4.95"150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. Page 9HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Low area drainage catchment Primary Stage-Discharge Discharge (cfs) 210Elevation (feet)5 4 Pond 1P: Low area drainage catchment Storage Stage-Area-Storage Storage (cubic-feet) 24,00022,00020,00018,00016,00014,00012,00010,0008,0006,0004,0002,0000Elevation (feet)5 4 Infiltration System Storage Model EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. Page 10HydroCAD® 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=104,665 sf 3.13% Impervious Runoff Depth>1.07"Subcatchment 1S: Drainage Area DA1 EX Tc=5.0 min CN=39 Runoff=1.96 cfs 9,355 cf Peak Elev=4.22' Storage=2,814 cf Inflow=1.96 cfs 9,355 cfPond 1P: Low area drainage catchment Outflow=0.32 cfs 8,294 cf Total Runoff Area = 104,665 sf Runoff Volume = 9,355 cf Average Runoff Depth = 1.07" 96.87% Pervious = 101,392 sf 3.13% Impervious = 3,273 sf EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. Page 11HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA1 EX Time of Concentration Runoff = 1.96 cfs @ 12.11 hrs, Volume= 9,355 cf, Depth> 1.07" 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 89,721 32 Woods/grass comb., Good, HSG A * 3,273 98 Roof area * 11,671 75 compacted dirt/gravel drive 104,665 39 Weighted Average 101,392 96.87% Pervious Area 3,273 3.13% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Time Concentration EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. Page 12HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Low area drainage catchment Low drainage area 3"/hr infiltration rate model Inflow Area = 104,665 sf, 3.13% Impervious, Inflow Depth > 1.07" for Barn Cty 100 yr event Inflow = 1.96 cfs @ 12.11 hrs, Volume= 9,355 cf Outflow = 0.32 cfs @ 13.81 hrs, Volume= 8,294 cf, Atten= 84%, Lag= 102.3 min Primary = 0.32 cfs @ 13.81 hrs, Volume= 8,294 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 4.22' @ 13.81 hrs Storage= 2,814 cf Plug-Flow detention time= 148.0 min calculated for 8,294 cf (89% of inflow) Center-of-Mass det. time= 95.5 min ( 1,008.9 - 913.3 ) Volume Invert Avail.Storage Storage Description #1 4.00' 25,837 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 4.00 0 5.00 12,837 5.50 25,837 Device Routing Invert Outlet Devices #1 Primary 0.00'Infiltration Model Elev. (feet) 0.00 4.00 4.10 5.00 5.50 Disch. (cfs) 0.000 0.010 0.110 1.670 2.300 Primary OutFlow Max=0.32 cfs @ 13.81 hrs HW=4.22' (Free Discharge) 1=Infiltration Model (Custom Controls 0.32 cfs) EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. Page 13HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Low area drainage catchment Primary Stage-Discharge Discharge (cfs) 210Elevation (feet)5 4 Pond 1P: Low area drainage catchment Storage Stage-Area-Storage Storage (cubic-feet) 24,00022,00020,00018,00016,00014,00012,00010,0008,0006,0004,0002,0000Elevation (feet)5 4 Infiltration System Storage Model EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 2 Yr Rainfall=3.39"150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. Page 14HydroCAD® 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=104,665 sf 3.13% Impervious Runoff Depth>0.00"Subcatchment 1S: Drainage Area DA1 EX Tc=5.0 min CN=39 Runoff=0.00 cfs 37 cf Peak Elev=4.00' Storage=15 cf Inflow=0.00 cfs 37 cfPond 1P: Low area drainage catchment Outflow=0.00 cfs 22 cf Total Runoff Area = 104,665 sf Runoff Volume = 37 cf Average Runoff Depth = 0.00" 96.87% Pervious = 101,392 sf 3.13% Impervious = 3,273 sf EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 2 Yr Rainfall=3.39"150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. Page 15HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA1 EX Time of Concentration Runoff = 0.00 cfs @ 23.55 hrs, Volume= 37 cf, Depth> 0.00" 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 89,721 32 Woods/grass comb., Good, HSG A * 3,273 98 Roof area * 11,671 75 compacted dirt/gravel drive 104,665 39 Weighted Average 101,392 96.87% Pervious Area 3,273 3.13% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Time Concentration EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 2 Yr Rainfall=3.39"150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. Page 16HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Low area drainage catchment Low drainage area 3"/hr infiltration rate model Inflow Area = 104,665 sf, 3.13% Impervious, Inflow Depth > 0.00" for Barn Cty 2 Yr event Inflow = 0.00 cfs @ 23.55 hrs, Volume= 37 cf Outflow = 0.00 cfs @ 24.00 hrs, Volume= 22 cf, Atten= 15%, Lag= 27.1 min Primary = 0.00 cfs @ 24.00 hrs, Volume= 22 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 4.00' @ 24.00 hrs Storage= 15 cf Plug-Flow detention time= 91.3 min calculated for 22 cf (60% of inflow) Center-of-Mass det. time= 29.0 min ( 1,323.1 - 1,294.1 ) Volume Invert Avail.Storage Storage Description #1 4.00' 25,837 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 4.00 0 5.00 12,837 5.50 25,837 Device Routing Invert Outlet Devices #1 Primary 0.00'Infiltration Model Elev. (feet) 0.00 4.00 4.10 5.00 5.50 Disch. (cfs) 0.000 0.010 0.110 1.670 2.300 Primary OutFlow Max=0.01 cfs @ 24.00 hrs HW=4.00' (Free Discharge) 1=Infiltration Model (Custom Controls 0.01 cfs) EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 2 Yr Rainfall=3.39"150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. Page 17HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Low area drainage catchment Primary Stage-Discharge Discharge (cfs) 210Elevation (feet)5 4 Pond 1P: Low area drainage catchment Storage Stage-Area-Storage Storage (cubic-feet) 24,00022,00020,00018,00016,00014,00012,00010,0008,0006,0004,0002,0000Elevation (feet)5 4 Infiltration System Storage Model EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 25 Yr Rainfall=5.92"150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. Page 18HydroCAD® 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=104,665 sf 3.13% Impervious Runoff Depth>0.42"Subcatchment 1S: Drainage Area DA1 EX Tc=5.0 min CN=39 Runoff=0.40 cfs 3,679 cf Peak Elev=4.09' Storage=1,105 cf Inflow=0.40 cfs 3,679 cfPond 1P: Low area drainage catchment Outflow=0.10 cfs 3,160 cf Total Runoff Area = 104,665 sf Runoff Volume = 3,679 cf Average Runoff Depth = 0.42" 96.87% Pervious = 101,392 sf 3.13% Impervious = 3,273 sf EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 25 Yr Rainfall=5.92"150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. Page 19HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA1 EX Time of Concentration Runoff = 0.40 cfs @ 12.34 hrs, Volume= 3,679 cf, Depth> 0.42" 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 89,721 32 Woods/grass comb., Good, HSG A * 3,273 98 Roof area * 11,671 75 compacted dirt/gravel drive 104,665 39 Weighted Average 101,392 96.87% Pervious Area 3,273 3.13% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Time Concentration EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 25 Yr Rainfall=5.92"150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. Page 20HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Low area drainage catchment Low drainage area 3"/hr infiltration rate model Inflow Area = 104,665 sf, 3.13% Impervious, Inflow Depth > 0.42" for Barn Cty 25 Yr event Inflow = 0.40 cfs @ 12.34 hrs, Volume= 3,679 cf Outflow = 0.10 cfs @ 15.67 hrs, Volume= 3,160 cf, Atten= 76%, Lag= 200.0 min Primary = 0.10 cfs @ 15.67 hrs, Volume= 3,160 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 4.09' @ 15.67 hrs Storage= 1,105 cf Plug-Flow detention time= 167.0 min calculated for 3,160 cf (86% of inflow) Center-of-Mass det. time= 106.3 min ( 1,066.8 - 960.5 ) Volume Invert Avail.Storage Storage Description #1 4.00' 25,837 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 4.00 0 5.00 12,837 5.50 25,837 Device Routing Invert Outlet Devices #1 Primary 0.00'Infiltration Model Elev. (feet) 0.00 4.00 4.10 5.00 5.50 Disch. (cfs) 0.000 0.010 0.110 1.670 2.300 Primary OutFlow Max=0.10 cfs @ 15.67 hrs HW=4.09' (Free Discharge) 1=Infiltration Model (Custom Controls 0.10 cfs) EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 25 Yr Rainfall=5.92"150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. Page 21HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Low area drainage catchment Primary Stage-Discharge Discharge (cfs) 210Elevation (feet)5 4 Pond 1P: Low area drainage catchment Storage Stage-Area-Storage Storage (cubic-feet) 24,00022,00020,00018,00016,00014,00012,00010,0008,0006,0004,0002,0000Elevation (feet)5 4 Infiltration System Storage Model EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 5 Yr Rainfall=4.24"150 SOUTH ST EX 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=104,665 sf 3.13% Impervious Runoff Depth>0.07"Subcatchment 1S: Drainage Area DA1 EX Tc=5.0 min CN=39 Runoff=0.02 cfs 641 cf Peak Elev=4.01' Storage=133 cf Inflow=0.02 cfs 641 cfPond 1P: Low area drainage catchment Outflow=0.02 cfs 539 cf Total Runoff Area = 104,665 sf Runoff Volume = 641 cf Average Runoff Depth = 0.07" 96.87% Pervious = 101,392 sf 3.13% Impervious = 3,273 sf EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 5 Yr Rainfall=4.24"150 SOUTH ST EX 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 EX Time of Concentration Runoff = 0.02 cfs @ 15.07 hrs, Volume= 641 cf, Depth> 0.07" 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 5 Yr Rainfall=4.24" Area (sf) CN Description 89,721 32 Woods/grass comb., Good, HSG A * 3,273 98 Roof area * 11,671 75 compacted dirt/gravel drive 104,665 39 Weighted Average 101,392 96.87% Pervious Area 3,273 3.13% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Time Concentration EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 5 Yr Rainfall=4.24"150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. Page 24HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Low area drainage catchment Low drainage area 3"/hr infiltration rate model Inflow Area = 104,665 sf, 3.13% Impervious, Inflow Depth > 0.07" for Barn Cty 5 Yr event Inflow = 0.02 cfs @ 15.07 hrs, Volume= 641 cf Outflow = 0.02 cfs @ 17.61 hrs, Volume= 539 cf, Atten= 25%, Lag= 152.5 min Primary = 0.02 cfs @ 17.61 hrs, Volume= 539 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 4.01' @ 17.61 hrs Storage= 133 cf Plug-Flow detention time= 115.2 min calculated for 539 cf (84% of inflow) Center-of-Mass det. time= 61.1 min ( 1,143.9 - 1,082.9 ) Volume Invert Avail.Storage Storage Description #1 4.00' 25,837 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 4.00 0 5.00 12,837 5.50 25,837 Device Routing Invert Outlet Devices #1 Primary 0.00'Infiltration Model Elev. (feet) 0.00 4.00 4.10 5.00 5.50 Disch. (cfs) 0.000 0.010 0.110 1.670 2.300 Primary OutFlow Max=0.02 cfs @ 17.61 hrs HW=4.01' (Free Discharge) 1=Infiltration Model (Custom Controls 0.02 cfs) EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 5 Yr Rainfall=4.24"150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. Page 25HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Low area drainage catchment Primary Stage-Discharge Discharge (cfs) 210Elevation (feet)5 4 Pond 1P: Low area drainage catchment Storage Stage-Area-Storage Storage (cubic-feet) 24,00022,00020,00018,00016,00014,00012,00010,0008,0006,0004,0002,0000Elevation (feet)5 4 Infiltration System Storage Model EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 50 yr. Rainfall=6.65"150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. Page 26HydroCAD® 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=104,665 sf 3.13% Impervious Runoff Depth>0.65"Subcatchment 1S: Drainage Area DA1 EX Tc=5.0 min CN=39 Runoff=0.76 cfs 5,633 cf Peak Elev=4.13' Storage=1,696 cf Inflow=0.76 cfs 5,633 cfPond 1P: Low area drainage catchment Outflow=0.17 cfs 4,887 cf Total Runoff Area = 104,665 sf Runoff Volume = 5,633 cf Average Runoff Depth = 0.65" 96.87% Pervious = 101,392 sf 3.13% Impervious = 3,273 sf EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 50 yr. Rainfall=6.65"150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. Page 27HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA1 EX Time of Concentration Runoff = 0.76 cfs @ 12.14 hrs, Volume= 5,633 cf, Depth> 0.65" 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 50 yr. Rainfall=6.65" Area (sf) CN Description 89,721 32 Woods/grass comb., Good, HSG A * 3,273 98 Roof area * 11,671 75 compacted dirt/gravel drive 104,665 39 Weighted Average 101,392 96.87% Pervious Area 3,273 3.13% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Time Concentration EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 50 yr. Rainfall=6.65"150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. Page 28HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Low area drainage catchment Low drainage area 3"/hr infiltration rate model Inflow Area = 104,665 sf, 3.13% Impervious, Inflow Depth > 0.65" for Barn Cty 50 yr. event Inflow = 0.76 cfs @ 12.14 hrs, Volume= 5,633 cf Outflow = 0.17 cfs @ 14.84 hrs, Volume= 4,887 cf, Atten= 78%, Lag= 162.4 min Primary = 0.17 cfs @ 14.84 hrs, Volume= 4,887 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 4.13' @ 14.84 hrs Storage= 1,696 cf Plug-Flow detention time= 164.0 min calculated for 4,885 cf (87% of inflow) Center-of-Mass det. time= 105.2 min ( 1,042.5 - 937.3 ) Volume Invert Avail.Storage Storage Description #1 4.00' 25,837 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 4.00 0 5.00 12,837 5.50 25,837 Device Routing Invert Outlet Devices #1 Primary 0.00'Infiltration Model Elev. (feet) 0.00 4.00 4.10 5.00 5.50 Disch. (cfs) 0.000 0.010 0.110 1.670 2.300 Primary OutFlow Max=0.17 cfs @ 14.84 hrs HW=4.13' (Free Discharge) 1=Infiltration Model (Custom Controls 0.17 cfs) EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 50 yr. Rainfall=6.65"150 SOUTH ST EX DA1 Prepared by down cape engineering, inc. Page 29HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Low area drainage catchment Primary Stage-Discharge Discharge (cfs) 210Elevation (feet)5 4 Pond 1P: Low area drainage catchment Storage Stage-Area-Storage Storage (cubic-feet) 24,00022,00020,00018,00016,00014,00012,00010,0008,0006,0004,0002,0000Elevation (feet)5 4 Infiltration System Storage Model EX DA1C:\Users\Public\Documents\HydroCAD\Projects\ Table of Contents150 SOUTH ST EX 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) Barn Cty 10 Yr Event 6 Node Listing 7 Subcat 1S: Drainage Area DA1 EX 8 Pond 1P: Low area drainage catchment Barn Cty 100 yr Event 10 Node Listing 11 Subcat 1S: Drainage Area DA1 EX 12 Pond 1P: Low area drainage catchment Barn Cty 2 Yr Event 14 Node Listing 15 Subcat 1S: Drainage Area DA1 EX 16 Pond 1P: Low area drainage catchment Barn Cty 25 Yr Event 18 Node Listing 19 Subcat 1S: Drainage Area DA1 EX 20 Pond 1P: Low area drainage catchment Barn Cty 5 Yr Event 22 Node Listing 23 Subcat 1S: Drainage Area DA1 EX 24 Pond 1P: Low area drainage catchment Barn Cty 50 yr. Event 26 Node Listing 27 Subcat 1S: Drainage Area DA1 EX 28 Pond 1P: Low area drainage catchment 1S Drainage Area DA2 EX 1P Low area drainage catchment Routing Diagram for 150 SOUTH ST EX DA2 Prepared by down cape engineering, inc. HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Subcat Reach Pond Link EX DA2 Water side lawn/ex. house areaC:\Users\Public\Documents\HydroCAD\Projects\ 150 SOUTH ST EX DA2 Prepared by down cape engineering, inc. Page 2HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (sq-ft) CN Description (subcatchment-numbers) 2,860 98 Roof area (1S) 17,840 32 Woods/grass comb., Good, HSG A (1S) 20,700 41 TOTAL AREA EX DA2 Water side lawn/ex. house areaC:\Users\Public\Documents\HydroCAD\Projects\ 150 SOUTH ST EX DA2 Prepared by down cape engineering, inc. Page 3HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Soil Listing (all nodes) Area (sq-ft) Soil Group Subcatchment Numbers 17,840 HSG A 1S 0 HSG B 0 HSG C 0 HSG D 2,860 Other 1S 20,700 TOTAL AREA EX DA2 Water side lawn/ex. house areaC:\Users\Public\Documents\HydroCAD\Projects\ 150 SOUTH ST EX DA2 Prepared by down cape engineering, inc. Page 4HydroCAD® 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 2,860 2,860 Roof area 17,840 0 0 0 0 17,840 Woods/grass comb., Good 17,840 0 0 0 2,860 20,700 TOTAL AREA EX DA2 Water side lawn/ex. house areaC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST EX DA2 Prepared by down cape engineering, inc. Page 5HydroCAD® 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=20,700 sf 13.82% Impervious Runoff Depth>1.25"Subcatchment 1S: Drainage Area DA2 EX Tc=5.0 min CN=41 Runoff=0.51 cfs 2,160 cf Peak Elev=6.21' Storage=456 cf Inflow=0.51 cfs 2,160 cfPond 1P: Low area drainage catchment Outflow=0.12 cfs 2,156 cf Total Runoff Area = 20,700 sf Runoff Volume = 2,160 cf Average Runoff Depth = 1.25" 86.18% Pervious = 17,840 sf 13.82% Impervious = 2,860 sf EX DA2 Water side lawn/ex. house areaC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST EX DA2 Prepared by down cape engineering, inc. Page 6HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA2 EX Time of Concentration Runoff = 0.51 cfs @ 12.10 hrs, Volume= 2,160 cf, Depth> 1.25" 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 17,840 32 Woods/grass comb., Good, HSG A * 2,860 98 Roof area * 0 75 compacted dirt/gravel drive 20,700 41 Weighted Average 17,840 86.18% Pervious Area 2,860 13.82% 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 EX Runoff Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (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 Barn Cty 100 yr Rainfall=7.80" Runoff Area=20,700 sf Runoff Volume=2,160 cf Runoff Depth>1.25" Tc=5.0 min CN=41 0.51 cfs EX DA2 Water side lawn/ex. house areaC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST EX DA2 Prepared by down cape engineering, inc. Page 7HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Low area drainage catchment Low drainage area 3"/hr infiltration rate model Inflow Area = 20,700 sf, 13.82% Impervious, Inflow Depth > 1.25" for Barn Cty 100 yr event Inflow = 0.51 cfs @ 12.10 hrs, Volume= 2,160 cf Outflow = 0.12 cfs @ 12.72 hrs, Volume= 2,156 cf, Atten= 77%, Lag= 37.3 min Primary = 0.12 cfs @ 12.72 hrs, Volume= 2,156 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 6.21' @ 12.72 hrs Storage= 456 cf Plug-Flow detention time= 31.3 min calculated for 2,156 cf (100% of inflow) Center-of-Mass det. time= 30.2 min ( 933.4 - 903.3 ) Volume Invert Avail.Storage Storage Description #1 4.00' 2,200 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 4.00 0 6.00 1 7.00 2,200 Device Routing Invert Outlet Devices #1 Primary 4.00'Infiltration Model Elev. (feet) 4.00 6.00 6.01 7.00 Disch. (cfs) 0.000 0.000 0.090 0.220 Primary OutFlow Max=0.12 cfs @ 12.72 hrs HW=6.21' (Free Discharge) 1=Infiltration Model (Custom Controls 0.12 cfs) EX DA2 Water side lawn/ex. house areaC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST EX DA2 Prepared by down cape engineering, inc. Page 8HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Low area drainage catchment Inflow Primary Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (cfs)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=20,700 sf Peak Elev=6.21' Storage=456 cf 0.51 cfs 0.12 cfs Pond 1P: Low area drainage catchment Primary Stage-Discharge Discharge (cfs) 0.220.210.20.190.180.170.160.150.140.130.120.110.10.090.080.070.060.050.040.030.020.010Elevation (feet)7 6 5 4 Infiltration Model EX DA2 Water side lawn/ex. house areaC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST EX DA2 Prepared by down cape engineering, inc. Page 9HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Low area drainage catchment Storage Stage-Area-Storage Storage (cubic-feet) 2,2002,0001,8001,6001,4001,2001,0008006004002000Elevation (feet)7 6 5 4 Infiltration System Storage Model EX DA2 Water side lawn/ex. house areaC:\Users\Public\Documents\HydroCAD\Projects\ Table of Contents150 SOUTH ST EX 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 Area Listing (all nodes) 3 Soil Listing (all nodes) 4 Ground Covers (all nodes) Current Event 5 Node Listing 6 Subcat 1S: Drainage Area DA2 EX 7 Pond 1P: Low area drainage catchment 1S Drainage Area DA1 PROP 1P Rain garden and low area drainage catchment Routing Diagram for 150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Subcat Reach Pond Link PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ 150 SOUTH ST PROP 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 10 Yr Type III 24-hr Default 24.00 1 4.95 2 2 Barn Cty 100 yr Type III 24-hr Default 24.00 1 7.80 2 3 Barn Cty 2 Yr Type III 24-hr Default 24.00 1 3.39 2 4 Barn Cty 25 Yr Type III 24-hr Default 24.00 1 5.92 2 5 Barn Cty 5 Yr Type III 24-hr Default 24.00 1 4.24 2 6 Barn Cty 50 yr. Type III 24-hr Default 24.00 1 6.65 2 PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ 150 SOUTH ST PROP 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) 1,680 98 Roof area (1S) 91,578 32 Woods/grass comb., Good, HSG A (1S) 12,408 85 compacted dirt/paved drive mix (1S) 105,666 39 TOTAL AREA PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ 150 SOUTH ST PROP 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 91,578 HSG A 1S 0 HSG B 0 HSG C 0 HSG D 14,088 Other 1S 105,666 TOTAL AREA PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ 150 SOUTH ST PROP 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 1,680 1,680 Roof area 91,578 0 0 0 0 91,578 Woods/grass comb., Good 0 0 0 0 12,408 12,408 compacted dirt/paved drive mix 91,578 0 0 0 14,088 105,666 TOTAL AREA PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 10 Yr Rainfall=4.95"150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. Page 6HydroCAD® 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=105,666 sf 1.59% Impervious Runoff Depth>0.19"Subcatchment 1S: Drainage Area DA1 Tc=5.0 min CN=39 Runoff=0.08 cfs 1,668 cf Peak Elev=3.57' Storage=176 cf Inflow=0.08 cfs 1,668 cfPond 1P: Rain garden and low area drainage Outflow=0.06 cfs 1,603 cf Total Runoff Area = 105,666 sf Runoff Volume = 1,668 cf Average Runoff Depth = 0.19" 98.41% Pervious = 103,986 sf 1.59% Impervious = 1,680 sf PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 10 Yr Rainfall=4.95"150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. Page 7HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA1 PROP Time of Concentration Runoff = 0.08 cfs @ 12.47 hrs, Volume= 1,668 cf, Depth> 0.19" 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 91,578 32 Woods/grass comb., Good, HSG A * 1,680 98 Roof area * 12,408 85 compacted dirt/paved drive mix 105,666 39 Weighted Average 103,986 98.41% Pervious Area 1,680 1.59% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Time Concentration PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 10 Yr Rainfall=4.95"150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. Page 8HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Rain garden and low area drainage catchment Rain Garden and Low drainage area 3"/hr infiltration rate model Inflow Area = 105,666 sf, 1.59% Impervious, Inflow Depth > 0.19" for Barn Cty 10 Yr event Inflow = 0.08 cfs @ 12.47 hrs, Volume= 1,668 cf Outflow = 0.06 cfs @ 14.82 hrs, Volume= 1,603 cf, Atten= 26%, Lag= 141.2 min Primary = 0.06 cfs @ 14.82 hrs, Volume= 1,603 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 3.57' @ 14.82 hrs Storage= 176 cf Plug-Flow detention time= 48.1 min calculated for 1,603 cf (96% of inflow) Center-of-Mass det. time= 31.6 min ( 1,043.2 - 1,011.6 ) Volume Invert Avail.Storage Storage Description #1 3.50' 23,502 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 3.50 0 4.00 1,179 5.00 11,729 5.50 23,502 Device Routing Invert Outlet Devices #1 Primary 3.50'Infiltration Model Elev. (feet) 3.50 3.60 4.00 5.00 5.50 Disch. (cfs) 0.000 0.080 0.130 1.330 1.930 Primary OutFlow Max=0.06 cfs @ 14.82 hrs HW=3.57' (Free Discharge) 1=Infiltration Model (Custom Controls 0.06 cfs) PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 10 Yr Rainfall=4.95"150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. Page 9HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Rain garden and low area drainage catchment Primary Stage-Discharge Discharge (cfs) 10Elevation (feet)5 4 Infiltration Model Pond 1P: Rain garden and low area drainage catchment Storage Stage-Area-Storage Storage (cubic-feet) 22,00020,00018,00016,00014,00012,00010,0008,0006,0004,0002,0000Elevation (feet)5 4 Infiltration System Storage Model PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. Page 10HydroCAD® 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=105,666 sf 1.59% Impervious Runoff Depth>1.07"Subcatchment 1S: Drainage Area DA1 Tc=5.0 min CN=39 Runoff=1.98 cfs 9,444 cf Peak Elev=4.15' Storage=2,807 cf Inflow=1.98 cfs 9,444 cfPond 1P: Rain garden and low area drainage Outflow=0.32 cfs 8,708 cf Total Runoff Area = 105,666 sf Runoff Volume = 9,444 cf Average Runoff Depth = 1.07" 98.41% Pervious = 103,986 sf 1.59% Impervious = 1,680 sf PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. Page 11HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA1 PROP Time of Concentration Runoff = 1.98 cfs @ 12.11 hrs, Volume= 9,444 cf, Depth> 1.07" 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 91,578 32 Woods/grass comb., Good, HSG A * 1,680 98 Roof area * 12,408 85 compacted dirt/paved drive mix 105,666 39 Weighted Average 103,986 98.41% Pervious Area 1,680 1.59% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Time Concentration PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. Page 12HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Rain garden and low area drainage catchment Rain Garden and Low drainage area 3"/hr infiltration rate model Inflow Area = 105,666 sf, 1.59% Impervious, Inflow Depth > 1.07" for Barn Cty 100 yr event Inflow = 1.98 cfs @ 12.11 hrs, Volume= 9,444 cf Outflow = 0.32 cfs @ 13.85 hrs, Volume= 8,708 cf, Atten= 84%, Lag= 104.8 min Primary = 0.32 cfs @ 13.85 hrs, Volume= 8,708 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 4.15' @ 13.85 hrs Storage= 2,807 cf Plug-Flow detention time= 139.6 min calculated for 8,708 cf (92% of inflow) Center-of-Mass det. time= 102.0 min ( 1,015.4 - 913.3 ) Volume Invert Avail.Storage Storage Description #1 3.50' 23,502 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 3.50 0 4.00 1,179 5.00 11,729 5.50 23,502 Device Routing Invert Outlet Devices #1 Primary 3.50'Infiltration Model Elev. (feet) 3.50 3.60 4.00 5.00 5.50 Disch. (cfs) 0.000 0.080 0.130 1.330 1.930 Primary OutFlow Max=0.32 cfs @ 13.85 hrs HW=4.15' (Free Discharge) 1=Infiltration Model (Custom Controls 0.32 cfs) PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. Page 13HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Rain garden and low area drainage catchment Primary Stage-Discharge Discharge (cfs) 10Elevation (feet)5 4 Infiltration Model Pond 1P: Rain garden and low area drainage catchment Storage Stage-Area-Storage Storage (cubic-feet) 22,00020,00018,00016,00014,00012,00010,0008,0006,0004,0002,0000Elevation (feet)5 4 Infiltration System Storage Model PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 2 Yr Rainfall=3.39"150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. Page 14HydroCAD® 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=105,666 sf 1.59% Impervious Runoff Depth>0.00"Subcatchment 1S: Drainage Area DA1 Tc=5.0 min CN=39 Runoff=0.00 cfs 37 cf Peak Elev=3.50' Storage=7 cf Inflow=0.00 cfs 37 cfPond 1P: Rain garden and low area drainage Outflow=0.00 cfs 31 cf Total Runoff Area = 105,666 sf Runoff Volume = 37 cf Average Runoff Depth = 0.00" 98.41% Pervious = 103,986 sf 1.59% Impervious = 1,680 sf PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 2 Yr Rainfall=3.39"150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. Page 15HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA1 PROP Time of Concentration Runoff = 0.00 cfs @ 23.55 hrs, Volume= 37 cf, Depth> 0.00" 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 91,578 32 Woods/grass comb., Good, HSG A * 1,680 98 Roof area * 12,408 85 compacted dirt/paved drive mix 105,666 39 Weighted Average 103,986 98.41% Pervious Area 1,680 1.59% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Time Concentration PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 2 Yr Rainfall=3.39"150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. Page 16HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Rain garden and low area drainage catchment Rain Garden and Low drainage area 3"/hr infiltration rate model Inflow Area = 105,666 sf, 1.59% Impervious, Inflow Depth > 0.00" for Barn Cty 2 Yr event Inflow = 0.00 cfs @ 23.55 hrs, Volume= 37 cf Outflow = 0.00 cfs @ 24.00 hrs, Volume= 31 cf, Atten= 2%, Lag= 27.1 min Primary = 0.00 cfs @ 24.00 hrs, Volume= 31 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 3.50' @ 24.00 hrs Storage= 7 cf Plug-Flow detention time= 43.9 min calculated for 31 cf (82% of inflow) Center-of-Mass det. time= 17.2 min ( 1,311.2 - 1,294.1 ) Volume Invert Avail.Storage Storage Description #1 3.50' 23,502 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 3.50 0 4.00 1,179 5.00 11,729 5.50 23,502 Device Routing Invert Outlet Devices #1 Primary 3.50'Infiltration Model Elev. (feet) 3.50 3.60 4.00 5.00 5.50 Disch. (cfs) 0.000 0.080 0.130 1.330 1.930 Primary OutFlow Max=0.00 cfs @ 24.00 hrs HW=3.50' (Free Discharge) 1=Infiltration Model (Custom Controls 0.00 cfs) PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 2 Yr Rainfall=3.39"150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. Page 17HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Rain garden and low area drainage catchment Primary Stage-Discharge Discharge (cfs) 10Elevation (feet)5 4 Infiltration Model Pond 1P: Rain garden and low area drainage catchment Storage Stage-Area-Storage Storage (cubic-feet) 22,00020,00018,00016,00014,00012,00010,0008,0006,0004,0002,0000Elevation (feet)5 4 Infiltration System Storage Model PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 25 Yr Rainfall=5.92"150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. Page 18HydroCAD® 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=105,666 sf 1.59% Impervious Runoff Depth>0.42"Subcatchment 1S: Drainage Area DA1 Tc=5.0 min CN=39 Runoff=0.40 cfs 3,714 cf Peak Elev=3.85' Storage=814 cf Inflow=0.40 cfs 3,714 cfPond 1P: Rain garden and low area drainage Outflow=0.11 cfs 3,601 cf Total Runoff Area = 105,666 sf Runoff Volume = 3,714 cf Average Runoff Depth = 0.42" 98.41% Pervious = 103,986 sf 1.59% Impervious = 1,680 sf PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 25 Yr Rainfall=5.92"150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. Page 19HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA1 PROP Time of Concentration Runoff = 0.40 cfs @ 12.34 hrs, Volume= 3,714 cf, Depth> 0.42" 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 91,578 32 Woods/grass comb., Good, HSG A * 1,680 98 Roof area * 12,408 85 compacted dirt/paved drive mix 105,666 39 Weighted Average 103,986 98.41% Pervious Area 1,680 1.59% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Time Concentration PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 25 Yr Rainfall=5.92"150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. Page 20HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Rain garden and low area drainage catchment Rain Garden and Low drainage area 3"/hr infiltration rate model Inflow Area = 105,666 sf, 1.59% Impervious, Inflow Depth > 0.42" for Barn Cty 25 Yr event Inflow = 0.40 cfs @ 12.34 hrs, Volume= 3,714 cf Outflow = 0.11 cfs @ 15.16 hrs, Volume= 3,601 cf, Atten= 72%, Lag= 169.6 min Primary = 0.11 cfs @ 15.16 hrs, Volume= 3,601 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 3.85' @ 15.16 hrs Storage= 814 cf Plug-Flow detention time= 90.6 min calculated for 3,600 cf (97% of inflow) Center-of-Mass det. time= 76.4 min ( 1,036.8 - 960.5 ) Volume Invert Avail.Storage Storage Description #1 3.50' 23,502 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 3.50 0 4.00 1,179 5.00 11,729 5.50 23,502 Device Routing Invert Outlet Devices #1 Primary 3.50'Infiltration Model Elev. (feet) 3.50 3.60 4.00 5.00 5.50 Disch. (cfs) 0.000 0.080 0.130 1.330 1.930 Primary OutFlow Max=0.11 cfs @ 15.16 hrs HW=3.85' (Free Discharge) 1=Infiltration Model (Custom Controls 0.11 cfs) PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 25 Yr Rainfall=5.92"150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. Page 21HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Rain garden and low area drainage catchment Primary Stage-Discharge Discharge (cfs) 10Elevation (feet)5 4 Infiltration Model Pond 1P: Rain garden and low area drainage catchment Storage Stage-Area-Storage Storage (cubic-feet) 22,00020,00018,00016,00014,00012,00010,0008,0006,0004,0002,0000Elevation (feet)5 4 Infiltration System Storage Model PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 5 Yr Rainfall=4.24"150 SOUTH ST PROP 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=105,666 sf 1.59% Impervious Runoff Depth>0.07"Subcatchment 1S: Drainage Area DA1 Tc=5.0 min CN=39 Runoff=0.02 cfs 647 cf Peak Elev=3.53' Storage=63 cf Inflow=0.02 cfs 647 cfPond 1P: Rain garden and low area drainage Outflow=0.02 cfs 611 cf Total Runoff Area = 105,666 sf Runoff Volume = 647 cf Average Runoff Depth = 0.07" 98.41% Pervious = 103,986 sf 1.59% Impervious = 1,680 sf PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 5 Yr Rainfall=4.24"150 SOUTH ST PROP 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 PROP Time of Concentration Runoff = 0.02 cfs @ 15.07 hrs, Volume= 647 cf, Depth> 0.07" 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 5 Yr Rainfall=4.24" Area (sf) CN Description 91,578 32 Woods/grass comb., Good, HSG A * 1,680 98 Roof area * 12,408 85 compacted dirt/paved drive mix 105,666 39 Weighted Average 103,986 98.41% Pervious Area 1,680 1.59% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Time Concentration PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 5 Yr Rainfall=4.24"150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. Page 24HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Rain garden and low area drainage catchment Rain Garden and Low drainage area 3"/hr infiltration rate model Inflow Area = 105,666 sf, 1.59% Impervious, Inflow Depth > 0.07" for Barn Cty 5 Yr event Inflow = 0.02 cfs @ 15.07 hrs, Volume= 647 cf Outflow = 0.02 cfs @ 15.91 hrs, Volume= 611 cf, Atten= 9%, Lag= 50.3 min Primary = 0.02 cfs @ 15.91 hrs, Volume= 611 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 3.53' @ 15.91 hrs Storage= 63 cf Plug-Flow detention time= 47.6 min calculated for 610 cf (94% of inflow) Center-of-Mass det. time= 28.0 min ( 1,110.9 - 1,082.9 ) Volume Invert Avail.Storage Storage Description #1 3.50' 23,502 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 3.50 0 4.00 1,179 5.00 11,729 5.50 23,502 Device Routing Invert Outlet Devices #1 Primary 3.50'Infiltration Model Elev. (feet) 3.50 3.60 4.00 5.00 5.50 Disch. (cfs) 0.000 0.080 0.130 1.330 1.930 Primary OutFlow Max=0.02 cfs @ 15.91 hrs HW=3.53' (Free Discharge) 1=Infiltration Model (Custom Controls 0.02 cfs) PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 5 Yr Rainfall=4.24"150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. Page 25HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Rain garden and low area drainage catchment Primary Stage-Discharge Discharge (cfs) 10Elevation (feet)5 4 Infiltration Model Pond 1P: Rain garden and low area drainage catchment Storage Stage-Area-Storage Storage (cubic-feet) 22,00020,00018,00016,00014,00012,00010,0008,0006,0004,0002,0000Elevation (feet)5 4 Infiltration System Storage Model PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 50 yr. Rainfall=6.65"150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. Page 26HydroCAD® 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=105,666 sf 1.59% Impervious Runoff Depth>0.65"Subcatchment 1S: Drainage Area DA1 Tc=5.0 min CN=39 Runoff=0.76 cfs 5,687 cf Peak Elev=4.04' Storage=1,551 cf Inflow=0.76 cfs 5,687 cfPond 1P: Rain garden and low area drainage Outflow=0.17 cfs 5,430 cf Total Runoff Area = 105,666 sf Runoff Volume = 5,687 cf Average Runoff Depth = 0.65" 98.41% Pervious = 103,986 sf 1.59% Impervious = 1,680 sf PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 50 yr. Rainfall=6.65"150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. Page 27HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA1 PROP Time of Concentration Runoff = 0.76 cfs @ 12.14 hrs, Volume= 5,687 cf, Depth> 0.65" 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 50 yr. Rainfall=6.65" Area (sf) CN Description 91,578 32 Woods/grass comb., Good, HSG A * 1,680 98 Roof area * 12,408 85 compacted dirt/paved drive mix 105,666 39 Weighted Average 103,986 98.41% Pervious Area 1,680 1.59% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Time Concentration PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 50 yr. Rainfall=6.65"150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. Page 28HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Rain garden and low area drainage catchment Rain Garden and Low drainage area 3"/hr infiltration rate model Inflow Area = 105,666 sf, 1.59% Impervious, Inflow Depth > 0.65" for Barn Cty 50 yr. event Inflow = 0.76 cfs @ 12.14 hrs, Volume= 5,687 cf Outflow = 0.17 cfs @ 14.69 hrs, Volume= 5,430 cf, Atten= 77%, Lag= 153.1 min Primary = 0.17 cfs @ 14.69 hrs, Volume= 5,430 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 4.04' @ 14.69 hrs Storage= 1,551 cf Plug-Flow detention time= 129.6 min calculated for 5,430 cf (95% of inflow) Center-of-Mass det. time= 107.9 min ( 1,045.2 - 937.3 ) Volume Invert Avail.Storage Storage Description #1 3.50' 23,502 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 3.50 0 4.00 1,179 5.00 11,729 5.50 23,502 Device Routing Invert Outlet Devices #1 Primary 3.50'Infiltration Model Elev. (feet) 3.50 3.60 4.00 5.00 5.50 Disch. (cfs) 0.000 0.080 0.130 1.330 1.930 Primary OutFlow Max=0.17 cfs @ 14.69 hrs HW=4.04' (Free Discharge) 1=Infiltration Model (Custom Controls 0.17 cfs) PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 50 yr. Rainfall=6.65"150 SOUTH ST PROP DA1 Prepared by down cape engineering, inc. Page 29HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Rain garden and low area drainage catchment Primary Stage-Discharge Discharge (cfs) 10Elevation (feet)5 4 Infiltration Model Pond 1P: Rain garden and low area drainage catchment Storage Stage-Area-Storage Storage (cubic-feet) 22,00020,00018,00016,00014,00012,00010,0008,0006,0004,0002,0000Elevation (feet)5 4 Infiltration System Storage Model PROP DA1C:\Users\Public\Documents\HydroCAD\Projects\ Table of Contents150 SOUTH ST PROP 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) Barn Cty 10 Yr Event 6 Node Listing 7 Subcat 1S: Drainage Area DA1 PROP 8 Pond 1P: Rain garden and low area drainage catchment Barn Cty 100 yr Event 10 Node Listing 11 Subcat 1S: Drainage Area DA1 PROP 12 Pond 1P: Rain garden and low area drainage catchment Barn Cty 2 Yr Event 14 Node Listing 15 Subcat 1S: Drainage Area DA1 PROP 16 Pond 1P: Rain garden and low area drainage catchment Barn Cty 25 Yr Event 18 Node Listing 19 Subcat 1S: Drainage Area DA1 PROP 20 Pond 1P: Rain garden and low area drainage catchment Barn Cty 5 Yr Event 22 Node Listing 23 Subcat 1S: Drainage Area DA1 PROP 24 Pond 1P: Rain garden and low area drainage catchment Barn Cty 50 yr. Event 26 Node Listing 27 Subcat 1S: Drainage Area DA1 PROP 28 Pond 1P: Rain garden and low area drainage catchment 1S Drainage Area DA2 PROP 1P Roof drywell model Routing Diagram for 150 SOUTH ST PROP DA2 Prepared by down cape engineering, inc. HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Subcat Reach Pond Link PROP DA2 Roof/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ 150 SOUTH ST PROP 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 100 yr Type III 24-hr Default 24.00 1 7.80 2 PROP DA2 Roof/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ 150 SOUTH ST PROP 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) 8,154 98 Roof area and pool deck area (1S) 8,154 98 TOTAL AREA PROP DA2 Roof/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ 150 SOUTH ST PROP 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 0 HSG A 0 HSG B 0 HSG C 0 HSG D 8,154 Other 1S 8,154 TOTAL AREA PROP DA2 Roof/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ 150 SOUTH ST PROP 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 8,154 8,154 Roof area and pool deck area 0 0 0 0 8,154 8,154 TOTAL AREA PROP DA2 Roof/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST PROP DA2 Prepared by down cape engineering, inc. Page 6HydroCAD® 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=8,154 sf 100.00% Impervious Runoff Depth>7.55"Subcatchment 1S: Drainage Area DA2 Tc=5.0 min CN=98 Runoff=1.48 cfs 5,131 cf Peak Elev=7.53' Storage=450 cf Inflow=1.48 cfs 5,131 cfPond 1P: Roof drywell model Outflow=0.92 cfs 5,131 cf Total Runoff Area = 8,154 sf Runoff Volume = 5,131 cf Average Runoff Depth = 7.55" 0.00% Pervious = 0 sf 100.00% Impervious = 8,154 sf PROP DA2 Roof/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST PROP DA2 Prepared by down cape engineering, inc. Page 7HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA2 PROP Time of Concentration Runoff = 1.48 cfs @ 12.07 hrs, Volume= 5,131 cf, Depth> 7.55" 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 0 32 Woods/grass comb., Good, HSG A * 8,154 98 Roof area and pool deck area * 0 75 compacted dirt/gravel drive 8,154 98 Weighted Average 8,154 100.00% 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 PROP Runoff Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (cfs)1 0 Type III 24-hr Barn Cty 100 yr Rainfall=7.80" Runoff Area=8,154 sf Runoff Volume=5,131 cf Runoff Depth>7.55" Tc=5.0 min CN=98 1.48 cfs PROP DA2 Roof/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST PROP DA2 Prepared by down cape engineering, inc. Page 8HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Roof drywell model Roof drywell town infiltration rate used- sandy soils Inflow Area = 8,154 sf,100.00% Impervious, Inflow Depth > 7.55" for Barn Cty 100 yr event Inflow = 1.48 cfs @ 12.07 hrs, Volume= 5,131 cf Outflow = 0.92 cfs @ 12.16 hrs, Volume= 5,131 cf, Atten= 38%, Lag= 5.4 min Primary = 0.92 cfs @ 12.16 hrs, Volume= 5,131 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 7.53' @ 12.16 hrs Storage= 450 cf Plug-Flow detention time= 2.4 min calculated for 5,131 cf (100% of inflow) Center-of-Mass det. time= 2.3 min ( 742.8 - 740.5 ) Volume Invert Avail.Storage Storage Description #1 4.00' 510 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 4.00 0 6.00 255 8.00 510 Device Routing Invert Outlet Devices #1 Primary 4.00'Infiltration Model Elev. (feet) 4.00 4.01 6.00 8.00 Disch. (cfs) 0.000 0.350 0.650 1.000 Primary OutFlow Max=0.92 cfs @ 12.16 hrs HW=7.53' (Free Discharge) 1=Infiltration Model (Custom Controls 0.92 cfs) PROP DA2 Roof/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST PROP DA2 Prepared by down cape engineering, inc. Page 9HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Roof drywell model Inflow Primary Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (cfs)1 0 Inflow Area=8,154 sf Peak Elev=7.53' Storage=450 cf 1.48 cfs 0.92 cfs Pond 1P: Roof drywell model Primary Stage-Discharge Discharge (cfs) 10Elevation (feet)8 7 6 5 4 Infiltration Model PROP DA2 Roof/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST PROP DA2 Prepared by down cape engineering, inc. Page 10HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Roof drywell model Storage Stage-Area-Storage Storage (cubic-feet) 500480460440420400380360340320300280260240220200180160140120100806040200Elevation (feet)8 7 6 5 4 Infiltration System Storage Model PROP DA2 Roof/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ Table of Contents150 SOUTH ST PROP 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) Barn Cty 100 yr Event 6 Node Listing 7 Subcat 1S: Drainage Area DA2 PROP 8 Pond 1P: Roof drywell model 1S Drainage Area DA3 PROP 1P Rain garden/grass swale model Routing Diagram for 150 SOUTH ST PROP DA3 Prepared by down cape engineering, inc. HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Subcat Reach Pond Link PROP DA3 Water side lawn/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ 150 SOUTH ST PROP DA3 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 PROP DA3 Water side lawn/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ 150 SOUTH ST PROP DA3 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) 975 98 Roof area and pool deck area (1S) 11,175 32 Woods/grass comb., Good, HSG A (1S) 12,150 37 TOTAL AREA PROP DA3 Water side lawn/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ 150 SOUTH ST PROP DA3 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 11,175 HSG A 1S 0 HSG B 0 HSG C 0 HSG D 975 Other 1S 12,150 TOTAL AREA PROP DA3 Water side lawn/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ 150 SOUTH ST PROP DA3 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 0 975 975 Roof area and pool deck area 11,175 0 0 0 0 11,175 Woods/grass comb., Good 11,175 0 0 0 975 12,150 TOTAL AREA PROP DA3 Water side lawn/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr. Rainfall=7.80"150 SOUTH ST PROP DA3 Prepared by down cape engineering, inc. Page 6HydroCAD® 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=12,150 sf 8.02% Impervious Runoff Depth>0.90"Subcatchment 1S: Drainage Area DA3 PROP Tc=5.0 min CN=37 Runoff=0.16 cfs 911 cf Peak Elev=5.61' Storage=232 cf Inflow=0.16 cfs 911 cfPond 1P: Rain garden/grass swale model Outflow=0.03 cfs 895 cf Total Runoff Area = 12,150 sf Runoff Volume = 911 cf Average Runoff Depth = 0.90" 91.98% Pervious = 11,175 sf 8.02% Impervious = 975 sf PROP DA3 Water side lawn/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr. Rainfall=7.80"150 SOUTH ST PROP DA3 Prepared by down cape engineering, inc. Page 7HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA3 PROP Time of Concentration Runoff = 0.16 cfs @ 12.12 hrs, Volume= 911 cf, Depth> 0.90" 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 11,175 32 Woods/grass comb., Good, HSG A * 975 98 Roof area and pool deck area * 0 75 compacted dirt/gravel drive 12,150 37 Weighted Average 11,175 91.98% Pervious Area 975 8.02% 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 DA3 PROP Runoff Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (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 Barn Cty 100 yr. Rainfall=7.80" Runoff Area=12,150 sf Runoff Volume=911 cf Runoff Depth>0.90" Tc=5.0 min CN=37 0.16 cfs PROP DA3 Water side lawn/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr. Rainfall=7.80"150 SOUTH ST PROP DA3 Prepared by down cape engineering, inc. Page 8HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Rain garden/grass swale model Rain garden grass swale 3"/hr infiltration rate model Inflow Area = 12,150 sf, 8.02% Impervious, Inflow Depth > 0.90" for Barn Cty 100 yr. event Inflow = 0.16 cfs @ 12.12 hrs, Volume= 911 cf Outflow = 0.03 cfs @ 14.00 hrs, Volume= 895 cf, Atten= 81%, Lag= 112.9 min Primary = 0.03 cfs @ 14.00 hrs, Volume= 895 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 5.61' @ 14.00 hrs Storage= 232 cf Plug-Flow detention time= 91.4 min calculated for 895 cf (98% of inflow) Center-of-Mass det. time= 82.4 min ( 1,007.6 - 925.2 ) Volume Invert Avail.Storage Storage Description #1 5.50' 3,030 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 5.50 0 6.00 1,095 7.00 3,030 Device Routing Invert Outlet Devices #1 Primary 5.50'Infiltration Model Elev. (feet) 5.50 5.52 6.00 7.00 Disch. (cfs) 0.000 0.020 0.076 0.210 Primary OutFlow Max=0.03 cfs @ 14.00 hrs HW=5.61' (Free Discharge) 1=Infiltration Model (Custom Controls 0.03 cfs) PROP DA3 Water side lawn/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr. Rainfall=7.80"150 SOUTH ST PROP DA3 Prepared by down cape engineering, inc. Page 9HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Rain garden/grass swale model Inflow Primary Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (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 Inflow Area=12,150 sf Peak Elev=5.61' Storage=232 cf 0.16 cfs 0.03 cfs Pond 1P: Rain garden/grass swale model Primary Stage-Discharge Discharge (cfs) 0.210.20.190.180.170.160.150.140.130.120.110.10.090.080.070.060.050.040.030.020.010Elevation (feet)7 6 Infiltration Model PROP DA3 Water side lawn/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr. Rainfall=7.80"150 SOUTH ST PROP DA3 Prepared by down cape engineering, inc. Page 10HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Rain garden/grass swale model Storage Stage-Area-Storage Storage (cubic-feet) 3,0002,8002,6002,4002,2002,0001,8001,6001,4001,2001,0008006004002000Elevation (feet)7 6 Infiltration System Storage Model PROP DA3 Water side lawn/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ Table of Contents150 SOUTH ST PROP DA3 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) Barn Cty 100 yr. Event 6 Node Listing 7 Subcat 1S: Drainage Area DA3 PROP 8 Pond 1P: Rain garden/grass swale model 1S Drainage Area DA4 PROP 1P Grass swale model Routing Diagram for 150 SOUTH ST PROP DA4 Prepared by down cape engineering, inc. HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Subcat Reach Pond Link PROP DA4 Water side lawn/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ 150 SOUTH ST PROP DA4 Prepared by down cape engineering, inc. Page 2HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (sq-ft) CN Description (subcatchment-numbers) 1,227 98 Roof area and pool deck area (1S) 19,473 32 Woods/grass comb., Good, HSG A (1S) 20,700 36 TOTAL AREA PROP DA4 Water side lawn/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ 150 SOUTH ST PROP DA4 Prepared by down cape engineering, inc. Page 3HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Soil Listing (all nodes) Area (sq-ft) Soil Group Subcatchment Numbers 19,473 HSG A 1S 0 HSG B 0 HSG C 0 HSG D 1,227 Other 1S 20,700 TOTAL AREA PROP DA4 Water side lawn/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ 150 SOUTH ST PROP DA4 Prepared by down cape engineering, inc. Page 4HydroCAD® 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 1,227 1,227 Roof area and pool deck area 19,473 0 0 0 0 19,473 Woods/grass comb., Good 19,473 0 0 0 1,227 20,700 TOTAL AREA PROP DA4 Water side lawn/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST PROP DA4 Prepared by down cape engineering, inc. Page 5HydroCAD® 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=20,700 sf 5.93% Impervious Runoff Depth>0.82"Subcatchment 1S: Drainage Area DA4 PROP Tc=5.0 min CN=36 Runoff=0.21 cfs 1,408 cf Peak Elev=6.07' Storage=149 cf Inflow=0.21 cfs 1,408 cfPond 1P: Grass swale model Outflow=0.10 cfs 1,406 cf Total Runoff Area = 20,700 sf Runoff Volume = 1,408 cf Average Runoff Depth = 0.82" 94.07% Pervious = 19,473 sf 5.93% Impervious = 1,227 sf PROP DA4 Water side lawn/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST PROP DA4 Prepared by down cape engineering, inc. Page 6HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Drainage Area DA4 PROP Time of Concentration Runoff = 0.21 cfs @ 12.13 hrs, Volume= 1,408 cf, Depth> 0.82" 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 19,473 32 Woods/grass comb., Good, HSG A * 1,227 98 Roof area and pool deck area * 0 75 compacted dirt/gravel drive 20,700 36 Weighted Average 19,473 94.07% Pervious Area 1,227 5.93% 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 DA4 PROP Runoff Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (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 Barn Cty 100 yr Rainfall=7.80" Runoff Area=20,700 sf Runoff Volume=1,408 cf Runoff Depth>0.82" Tc=5.0 min CN=36 0.21 cfs PROP DA4 Water side lawn/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST PROP DA4 Prepared by down cape engineering, inc. Page 7HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Summary for Pond 1P: Grass swale model Rain garden grass swale 3"/hr infiltration rate model Inflow Area = 20,700 sf, 5.93% Impervious, Inflow Depth > 0.82" for Barn Cty 100 yr event Inflow = 0.21 cfs @ 12.13 hrs, Volume= 1,408 cf Outflow = 0.10 cfs @ 12.55 hrs, Volume= 1,406 cf, Atten= 54%, Lag= 25.5 min Primary = 0.10 cfs @ 12.55 hrs, Volume= 1,406 cf Routing by Stor-Ind method, Time Span= 1.00-24.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 6.07' @ 12.55 hrs Storage= 149 cf Plug-Flow detention time= 9.1 min calculated for 1,406 cf (100% of inflow) Center-of-Mass det. time= 8.1 min ( 940.1 - 932.0 ) Volume Invert Avail.Storage Storage Description #1 6.00' 2,160 cf Infiltration System Storage Model Listed below Elevation Cum.Store (feet) (cubic-feet) 6.00 0 7.00 2,160 Device Routing Invert Outlet Devices #1 Primary 6.00'Infiltration Model Elev. (feet) 6.00 6.01 7.00 Disch. (cfs) 0.000 0.090 0.210 Primary OutFlow Max=0.10 cfs @ 12.55 hrs HW=6.07' (Free Discharge) 1=Infiltration Model (Custom Controls 0.10 cfs) PROP DA4 Water side lawn/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST PROP DA4 Prepared by down cape engineering, inc. Page 8HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Grass swale model Inflow Primary Hydrograph Time (hours) 242322212019181716151413121110987654321Flow (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=20,700 sf Peak Elev=6.07' Storage=149 cf 0.21 cfs 0.10 cfs Pond 1P: Grass swale model Primary Stage-Discharge Discharge (cfs) 0.210.20.190.180.170.160.150.140.130.120.110.10.090.080.070.060.050.040.030.020.010Elevation (feet)7 6 Infiltration Model PROP DA4 Water side lawn/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ Type III 24-hr Barn Cty 100 yr Rainfall=7.80"150 SOUTH ST PROP DA4 Prepared by down cape engineering, inc. Page 9HydroCAD® 10.10-4b s/n 11505 © 2020 HydroCAD Software Solutions LLC Pond 1P: Grass swale model Storage Stage-Area-Storage Storage (cubic-feet) 2,0001,8001,6001,4001,2001,0008006004002000Elevation (feet)7 6 Infiltration System Storage Model PROP DA4 Water side lawn/pool deckC:\Users\Public\Documents\HydroCAD\Projects\ Table of Contents150 SOUTH ST PROP DA4 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 Area Listing (all nodes) 3 Soil Listing (all nodes) 4 Ground Covers (all nodes) Current Event 5 Node Listing 6 Subcat 1S: Drainage Area DA4 PROP 7 Pond 1P: Grass swale model