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WPO201800016 Calculations 2018-06-28
Birdwood Golf Course COUNTY OF ALBEMARLE , VIRGINIA WPO201800016 DESIGN CALCULATIONS JUNE, 27 2018 Prepared by: Craig Kotarski, PE Timmons Group 608 Preston Ave STE 200 Charlottesville, VA 22903 434.327.1688 Table of Contents Section Title 1 Pre-Developed HydroCAD Calculations 2 Post-Developed HydroCAD Calculations 1S Area 1 Pre 2S Area 2 Pre 3S Area 3 Pre 4S Area 4 Pre 5S Area 5 Pre 6S Area 6 Pre 7S Area 7 Pre 8S Area 8 Pre Routing Diagram for Birdwood Pre Prepared by Timmons Group, Printed 6/27/2018 HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Subcat Reach Pond Link Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 2HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (acres) CN Description (subcatchment-numbers) 151.780 61 (1S, 2S, 3S, 4S, 5S, 6S, 7S, 8S) 54.730 55 (2S, 3S, 4S, 5S, 7S) 5.120 98 (2S, 3S, 4S, 5S, 6S, 7S, 8S) 17.000 48 (3S) 228.630 59 TOTAL AREA Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 3HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Ground Covers (all nodes) HSG-A (acres) HSG-B (acres) HSG-C (acres) HSG-D (acres) Other (acres) Total (acres) Ground Cover Subcatchment Numbers 0.000 0.000 0.000 0.000 228.630 228.630 1S, 2S, 3S, 4S, 5S, 6S, 7S, 8S 0.000 0.000 0.000 0.000 228.630 228.630 TOTAL AREA Type II 24-hr 1yr Rainfall=3.04"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 4HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 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=3.200 ac 0.00% Impervious Runoff Depth>0.32"Subcatchment 1S: Area 1 Pre Tc=10.0 min CN=61 Runoff=1.27 cfs 0.086 af Runoff Area=39.510 ac 3.80% Impervious Runoff Depth>0.27"Subcatchment 2S: Area 2 Pre Tc=10.0 min CN=59 Runoff=11.26 cfs 0.876 af Runoff Area=91.430 ac 1.09% Impervious Runoff Depth>0.21"Subcatchment 3S: Area 3 Pre Tc=10.0 min CN=57 Runoff=16.98 cfs 1.626 af Runoff Area=52.960 ac 2.64% Impervious Runoff Depth>0.35"Subcatchment 4S: Area 4 Pre Tc=10.0 min CN=62 Runoff=24.33 cfs 1.567 af Runoff Area=21.160 ac 1.89% Impervious Runoff Depth>0.32"Subcatchment 5S: Area 5 Pre Tc=10.0 min CN=61 Runoff=8.43 cfs 0.571 af Runoff Area=2.000 ac 15.00% Impervious Runoff Depth>0.53"Subcatchment 6S: Area 6 Pre Tc=10.0 min CN=67 Runoff=1.60 cfs 0.088 af Runoff Area=18.150 ac 2.75% Impervious Runoff Depth>0.32"Subcatchment 7S: Area 7 Pre Tc=10.0 min CN=61 Runoff=7.23 cfs 0.490 af Runoff Area=0.220 ac 9.09% Impervious Runoff Depth>0.42"Subcatchment 8S: Area 8 Pre Tc=10.0 min CN=64 Runoff=0.13 cfs 0.008 af Total Runoff Area = 228.630 ac Runoff Volume = 5.312 af Average Runoff Depth = 0.28" 97.76% Pervious = 223.510 ac 2.24% Impervious = 5.120 ac Type II 24-hr 1yr Rainfall=3.04"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 5HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Area 1 Pre Runoff = 1.27 cfs @ 12.05 hrs, Volume= 0.086 af, Depth> 0.32" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1yr Rainfall=3.04" Area (ac) CN Description * 0.000 55 * 0.000 48 * 3.200 61 * 0.000 98 3.200 61 Weighted Average 3.200 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 1S: Area 1 Pre Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)1 0 Type II 24-hr 1yr Rainfall=3.04" Runoff Area=3.200 ac Runoff Volume=0.086 af Runoff Depth>0.32" Tc=10.0 min CN=61 1.27 cfs Type II 24-hr 1yr Rainfall=3.04"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 6HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Area 1 Pre Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.36 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.00 0.00 10.75 0.66 0.00 0.00 11.00 0.71 0.00 0.00 11.25 0.78 0.00 0.00 11.50 0.86 0.00 0.00 11.75 1.18 0.00 0.00 12.00 2.02 0.08 1.02 12.25 2.15 0.10 0.45 12.50 2.23 0.12 0.28 12.75 2.30 0.14 0.20 13.00 2.35 0.15 0.18 13.25 2.39 0.16 0.15 13.50 2.43 0.18 0.14 13.75 2.46 0.19 0.13 14.00 2.49 0.19 0.11 14.25 2.52 0.20 0.11 14.50 2.55 0.21 0.10 14.75 2.57 0.22 0.10 15.00 2.59 0.22 0.09 15.25 2.62 0.23 0.09 15.50 2.64 0.24 0.09 15.75 2.66 0.24 0.08 16.00 2.68 0.25 0.08 16.25 2.69 0.26 0.07 16.50 2.71 0.26 0.07 16.75 2.73 0.27 0.07 17.00 2.74 0.27 0.07 17.25 2.76 0.28 0.07 17.50 2.77 0.28 0.07 17.75 2.79 0.29 0.06 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 2.80 0.29 0.06 18.25 2.81 0.30 0.06 18.50 2.83 0.30 0.06 18.75 2.84 0.31 0.06 19.00 2.85 0.31 0.06 19.25 2.86 0.31 0.05 19.50 2.87 0.32 0.05 19.75 2.88 0.32 0.05 20.00 2.89 0.33 0.05 Type II 24-hr 1yr Rainfall=3.04"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 7HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 2S: Area 2 Pre Runoff = 11.26 cfs @ 12.06 hrs, Volume= 0.876 af, Depth> 0.27" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1yr Rainfall=3.04" Area (ac) CN Description * 19.830 55 * 0.000 48 * 18.180 61 * 1.500 98 39.510 59 Weighted Average 38.010 96.20% Pervious Area 1.500 3.80% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 2S: Area 2 Pre Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)12 11 10 9 8 7 6 5 4 3 2 1 0 Type II 24-hr 1yr Rainfall=3.04" Runoff Area=39.510 ac Runoff Volume=0.876 af Runoff Depth>0.27" Tc=10.0 min CN=59 11.26 cfs Type II 24-hr 1yr Rainfall=3.04"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 8HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 2S: Area 2 Pre Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.36 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.00 0.00 10.75 0.66 0.00 0.00 11.00 0.71 0.00 0.00 11.25 0.78 0.00 0.00 11.50 0.86 0.00 0.00 11.75 1.18 0.00 0.00 12.00 2.02 0.05 8.05 12.25 2.15 0.07 4.43 12.50 2.23 0.09 2.87 12.75 2.30 0.10 2.11 13.00 2.35 0.12 1.85 13.25 2.39 0.13 1.63 13.50 2.43 0.14 1.48 13.75 2.46 0.14 1.34 14.00 2.49 0.15 1.22 14.25 2.52 0.16 1.13 14.50 2.55 0.17 1.10 14.75 2.57 0.17 1.06 15.00 2.59 0.18 1.02 15.25 2.62 0.18 0.98 15.50 2.64 0.19 0.93 15.75 2.66 0.20 0.88 16.00 2.68 0.20 0.83 16.25 2.69 0.21 0.80 16.50 2.71 0.21 0.78 16.75 2.73 0.22 0.77 17.00 2.74 0.22 0.75 17.25 2.76 0.22 0.74 17.50 2.77 0.23 0.72 17.75 2.79 0.23 0.70 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 2.80 0.24 0.68 18.25 2.81 0.24 0.67 18.50 2.83 0.25 0.65 18.75 2.84 0.25 0.63 19.00 2.85 0.25 0.61 19.25 2.86 0.26 0.59 19.50 2.87 0.26 0.57 19.75 2.88 0.26 0.55 20.00 2.89 0.27 0.52 Type II 24-hr 1yr Rainfall=3.04"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 9HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: Area 3 Pre Runoff = 16.98 cfs @ 12.07 hrs, Volume= 1.626 af, Depth> 0.21" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1yr Rainfall=3.04" Area (ac) CN Description * 27.400 55 * 17.000 48 * 46.030 61 * 1.000 98 91.430 57 Weighted Average 90.430 98.91% Pervious Area 1.000 1.09% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 3S: Area 3 Pre Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Type II 24-hr 1yr Rainfall=3.04" Runoff Area=91.430 ac Runoff Volume=1.626 af Runoff Depth>0.21" Tc=10.0 min CN=57 16.98 cfs Type II 24-hr 1yr Rainfall=3.04"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 10HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 3S: Area 3 Pre Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.36 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.00 0.00 10.75 0.66 0.00 0.00 11.00 0.71 0.00 0.00 11.25 0.78 0.00 0.00 11.50 0.86 0.00 0.00 11.75 1.18 0.00 0.00 12.00 2.02 0.03 10.21 12.25 2.15 0.05 7.81 12.50 2.23 0.06 5.38 12.75 2.30 0.07 4.02 13.00 2.35 0.08 3.56 13.25 2.39 0.09 3.17 13.50 2.43 0.10 2.89 13.75 2.46 0.11 2.63 14.00 2.49 0.11 2.40 14.25 2.52 0.12 2.24 14.50 2.55 0.13 2.17 14.75 2.57 0.13 2.11 15.00 2.59 0.14 2.03 15.25 2.62 0.14 1.95 15.50 2.64 0.15 1.86 15.75 2.66 0.15 1.77 16.00 2.68 0.16 1.67 16.25 2.69 0.16 1.60 16.50 2.71 0.16 1.58 16.75 2.73 0.17 1.55 17.00 2.74 0.17 1.52 17.25 2.76 0.18 1.49 17.50 2.77 0.18 1.46 17.75 2.79 0.18 1.42 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 2.80 0.19 1.39 18.25 2.81 0.19 1.35 18.50 2.83 0.20 1.32 18.75 2.84 0.20 1.28 19.00 2.85 0.20 1.24 19.25 2.86 0.21 1.20 19.50 2.87 0.21 1.16 19.75 2.88 0.21 1.11 20.00 2.89 0.21 1.07 Type II 24-hr 1yr Rainfall=3.04"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 11HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 4S: Area 4 Pre Runoff = 24.33 cfs @ 12.05 hrs, Volume= 1.567 af, Depth> 0.35" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1yr Rainfall=3.04" Area (ac) CN Description * 2.400 55 * 0.000 48 * 49.160 61 * 1.400 98 52.960 62 Weighted Average 51.560 97.36% Pervious Area 1.400 2.64% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 4S: Area 4 Pre Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)26 24 22 20 18 16 14 12 10 8 6 4 2 0 Type II 24-hr 1yr Rainfall=3.04" Runoff Area=52.960 ac Runoff Volume=1.567 af Runoff Depth>0.35" Tc=10.0 min CN=62 24.33 cfs Type II 24-hr 1yr Rainfall=3.04"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 12HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 4S: Area 4 Pre Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.36 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.00 0.00 10.75 0.66 0.00 0.00 11.00 0.71 0.00 0.00 11.25 0.78 0.00 0.00 11.50 0.86 0.00 0.00 11.75 1.18 0.00 0.00 12.00 2.02 0.09 20.15 12.25 2.15 0.12 8.20 12.50 2.23 0.14 5.00 12.75 2.30 0.16 3.61 13.00 2.35 0.17 3.13 13.25 2.39 0.19 2.74 13.50 2.43 0.20 2.47 13.75 2.46 0.21 2.23 14.00 2.49 0.22 2.02 14.25 2.52 0.23 1.86 14.50 2.55 0.23 1.80 14.75 2.57 0.24 1.73 15.00 2.59 0.25 1.66 15.25 2.62 0.26 1.59 15.50 2.64 0.26 1.51 15.75 2.66 0.27 1.43 16.00 2.68 0.28 1.34 16.25 2.69 0.28 1.28 16.50 2.71 0.29 1.26 16.75 2.73 0.29 1.23 17.00 2.74 0.30 1.21 17.25 2.76 0.31 1.18 17.50 2.77 0.31 1.15 17.75 2.79 0.32 1.12 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 2.80 0.32 1.09 18.25 2.81 0.33 1.06 18.50 2.83 0.33 1.03 18.75 2.84 0.34 1.00 19.00 2.85 0.34 0.96 19.25 2.86 0.34 0.93 19.50 2.87 0.35 0.90 19.75 2.88 0.35 0.86 20.00 2.89 0.36 0.83 Type II 24-hr 1yr Rainfall=3.04"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 13HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 5S: Area 5 Pre Runoff = 8.43 cfs @ 12.05 hrs, Volume= 0.571 af, Depth> 0.32" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1yr Rainfall=3.04" Area (ac) CN Description * 3.500 55 * 0.000 48 * 17.260 61 * 0.400 98 21.160 61 Weighted Average 20.760 98.11% Pervious Area 0.400 1.89% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 5S: Area 5 Pre Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)9 8 7 6 5 4 3 2 1 0 Type II 24-hr 1yr Rainfall=3.04" Runoff Area=21.160 ac Runoff Volume=0.571 af Runoff Depth>0.32" Tc=10.0 min CN=61 8.43 cfs Type II 24-hr 1yr Rainfall=3.04"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 14HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 5S: Area 5 Pre Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.36 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.00 0.00 10.75 0.66 0.00 0.00 11.00 0.71 0.00 0.00 11.25 0.78 0.00 0.00 11.50 0.86 0.00 0.00 11.75 1.18 0.00 0.00 12.00 2.02 0.08 6.72 12.25 2.15 0.10 2.97 12.50 2.23 0.12 1.84 12.75 2.30 0.14 1.34 13.00 2.35 0.15 1.16 13.25 2.39 0.16 1.02 13.50 2.43 0.18 0.92 13.75 2.46 0.19 0.83 14.00 2.49 0.19 0.75 14.25 2.52 0.20 0.70 14.50 2.55 0.21 0.67 14.75 2.57 0.22 0.65 15.00 2.59 0.22 0.62 15.25 2.62 0.23 0.60 15.50 2.64 0.24 0.57 15.75 2.66 0.24 0.54 16.00 2.68 0.25 0.51 16.25 2.69 0.26 0.48 16.50 2.71 0.26 0.47 16.75 2.73 0.27 0.47 17.00 2.74 0.27 0.46 17.25 2.76 0.28 0.45 17.50 2.77 0.28 0.43 17.75 2.79 0.29 0.42 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 2.80 0.29 0.41 18.25 2.81 0.30 0.40 18.50 2.83 0.30 0.39 18.75 2.84 0.31 0.38 19.00 2.85 0.31 0.37 19.25 2.86 0.31 0.35 19.50 2.87 0.32 0.34 19.75 2.88 0.32 0.33 20.00 2.89 0.33 0.31 Type II 24-hr 1yr Rainfall=3.04"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 15HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 6S: Area 6 Pre Runoff = 1.60 cfs @ 12.04 hrs, Volume= 0.088 af, Depth> 0.53" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1yr Rainfall=3.04" Area (ac) CN Description * 0.000 55 * 0.000 48 * 1.700 61 * 0.300 98 2.000 67 Weighted Average 1.700 85.00% Pervious Area 0.300 15.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 6S: Area 6 Pre Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)1 0 Type II 24-hr 1yr Rainfall=3.04" Runoff Area=2.000 ac Runoff Volume=0.088 af Runoff Depth>0.53" Tc=10.0 min CN=67 1.60 cfs Type II 24-hr 1yr Rainfall=3.04"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 16HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 6S: Area 6 Pre Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.36 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.00 0.00 10.75 0.66 0.00 0.00 11.00 0.71 0.00 0.00 11.25 0.78 0.00 0.00 11.50 0.86 0.00 0.00 11.75 1.18 0.01 0.02 12.00 2.02 0.18 1.47 12.25 2.15 0.22 0.46 12.50 2.23 0.25 0.26 12.75 2.30 0.28 0.19 13.00 2.35 0.29 0.16 13.25 2.39 0.31 0.14 13.50 2.43 0.33 0.13 13.75 2.46 0.34 0.11 14.00 2.49 0.35 0.10 14.25 2.52 0.36 0.09 14.50 2.55 0.38 0.09 14.75 2.57 0.39 0.09 15.00 2.59 0.40 0.08 15.25 2.62 0.41 0.08 15.50 2.64 0.42 0.07 15.75 2.66 0.42 0.07 16.00 2.68 0.43 0.07 16.25 2.69 0.44 0.06 16.50 2.71 0.45 0.06 16.75 2.73 0.45 0.06 17.00 2.74 0.46 0.06 17.25 2.76 0.47 0.06 17.50 2.77 0.48 0.06 17.75 2.79 0.48 0.05 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 2.80 0.49 0.05 18.25 2.81 0.49 0.05 18.50 2.83 0.50 0.05 18.75 2.84 0.51 0.05 19.00 2.85 0.51 0.05 19.25 2.86 0.52 0.04 19.50 2.87 0.52 0.04 19.75 2.88 0.53 0.04 20.00 2.89 0.53 0.04 Type II 24-hr 1yr Rainfall=3.04"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 17HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 7S: Area 7 Pre Runoff = 7.23 cfs @ 12.05 hrs, Volume= 0.490 af, Depth> 0.32" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1yr Rainfall=3.04" Area (ac) CN Description * 1.600 55 * 0.000 48 * 16.050 61 * 0.500 98 18.150 61 Weighted Average 17.650 97.25% Pervious Area 0.500 2.75% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 7S: Area 7 Pre Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)8 7 6 5 4 3 2 1 0 Type II 24-hr 1yr Rainfall=3.04" Runoff Area=18.150 ac Runoff Volume=0.490 af Runoff Depth>0.32" Tc=10.0 min CN=61 7.23 cfs Type II 24-hr 1yr Rainfall=3.04"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 18HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 7S: Area 7 Pre Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.36 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.00 0.00 10.75 0.66 0.00 0.00 11.00 0.71 0.00 0.00 11.25 0.78 0.00 0.00 11.50 0.86 0.00 0.00 11.75 1.18 0.00 0.00 12.00 2.02 0.08 5.76 12.25 2.15 0.10 2.55 12.50 2.23 0.12 1.58 12.75 2.30 0.14 1.15 13.00 2.35 0.15 1.00 13.25 2.39 0.16 0.88 13.50 2.43 0.18 0.79 13.75 2.46 0.19 0.71 14.00 2.49 0.19 0.65 14.25 2.52 0.20 0.60 14.50 2.55 0.21 0.58 14.75 2.57 0.22 0.56 15.00 2.59 0.22 0.54 15.25 2.62 0.23 0.51 15.50 2.64 0.24 0.49 15.75 2.66 0.24 0.46 16.00 2.68 0.25 0.43 16.25 2.69 0.26 0.42 16.50 2.71 0.26 0.41 16.75 2.73 0.27 0.40 17.00 2.74 0.27 0.39 17.25 2.76 0.28 0.38 17.50 2.77 0.28 0.37 17.75 2.79 0.29 0.36 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 2.80 0.29 0.35 18.25 2.81 0.30 0.34 18.50 2.83 0.30 0.33 18.75 2.84 0.31 0.32 19.00 2.85 0.31 0.31 19.25 2.86 0.31 0.30 19.50 2.87 0.32 0.29 19.75 2.88 0.32 0.28 20.00 2.89 0.33 0.27 Type II 24-hr 1yr Rainfall=3.04"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 19HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 8S: Area 8 Pre Runoff = 0.13 cfs @ 12.04 hrs, Volume= 0.008 af, Depth> 0.42" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1yr Rainfall=3.04" Area (ac) CN Description * 0.000 55 * 0.000 48 * 0.200 61 * 0.020 98 0.220 64 Weighted Average 0.200 90.91% Pervious Area 0.020 9.09% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 8S: Area 8 Pre Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Type II 24-hr 1yr Rainfall=3.04" Runoff Area=0.220 ac Runoff Volume=0.008 af Runoff Depth>0.42" Tc=10.0 min CN=64 0.13 cfs Type II 24-hr 1yr Rainfall=3.04"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 20HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 8S: Area 8 Pre Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.36 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.00 0.00 10.75 0.66 0.00 0.00 11.00 0.71 0.00 0.00 11.25 0.78 0.00 0.00 11.50 0.86 0.00 0.00 11.75 1.18 0.00 0.00 12.00 2.02 0.12 0.11 12.25 2.15 0.16 0.04 12.50 2.23 0.18 0.02 12.75 2.30 0.20 0.02 13.00 2.35 0.22 0.01 13.25 2.39 0.23 0.01 13.50 2.43 0.25 0.01 13.75 2.46 0.26 0.01 14.00 2.49 0.27 0.01 14.25 2.52 0.28 0.01 14.50 2.55 0.29 0.01 14.75 2.57 0.30 0.01 15.00 2.59 0.30 0.01 15.25 2.62 0.31 0.01 15.50 2.64 0.32 0.01 15.75 2.66 0.33 0.01 16.00 2.68 0.33 0.01 16.25 2.69 0.34 0.01 16.50 2.71 0.35 0.01 16.75 2.73 0.35 0.01 17.00 2.74 0.36 0.01 17.25 2.76 0.37 0.01 17.50 2.77 0.37 0.01 17.75 2.79 0.38 0.01 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 2.80 0.38 0.01 18.25 2.81 0.39 0.00 18.50 2.83 0.40 0.00 18.75 2.84 0.40 0.00 19.00 2.85 0.41 0.00 19.25 2.86 0.41 0.00 19.50 2.87 0.41 0.00 19.75 2.88 0.42 0.00 20.00 2.89 0.42 0.00 Type II 24-hr 10 yr Rainfall=5.55"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 21HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 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=3.200 ac 0.00% Impervious Runoff Depth>1.54"Subcatchment 1S: Area 1 Pre Tc=10.0 min CN=61 Runoff=8.03 cfs 0.410 af Runoff Area=39.510 ac 3.80% Impervious Runoff Depth>1.39"Subcatchment 2S: Area 2 Pre Tc=10.0 min CN=59 Runoff=88.96 cfs 4.585 af Runoff Area=91.430 ac 1.09% Impervious Runoff Depth>1.25"Subcatchment 3S: Area 3 Pre Tc=10.0 min CN=57 Runoff=182.73 cfs 9.552 af Runoff Area=52.960 ac 2.64% Impervious Runoff Depth>1.61"Subcatchment 4S: Area 4 Pre Tc=10.0 min CN=62 Runoff=139.74 cfs 7.107 af Runoff Area=21.160 ac 1.89% Impervious Runoff Depth>1.54"Subcatchment 5S: Area 5 Pre Tc=10.0 min CN=61 Runoff=53.08 cfs 2.710 af Runoff Area=2.000 ac 15.00% Impervious Runoff Depth>2.00"Subcatchment 6S: Area 6 Pre Tc=10.0 min CN=67 Runoff=6.61 cfs 0.333 af Runoff Area=18.150 ac 2.75% Impervious Runoff Depth>1.54"Subcatchment 7S: Area 7 Pre Tc=10.0 min CN=61 Runoff=45.53 cfs 2.324 af Runoff Area=0.220 ac 9.09% Impervious Runoff Depth>1.76"Subcatchment 8S: Area 8 Pre Tc=10.0 min CN=64 Runoff=0.64 cfs 0.032 af Total Runoff Area = 228.630 ac Runoff Volume = 27.052 af Average Runoff Depth = 1.42" 97.76% Pervious = 223.510 ac 2.24% Impervious = 5.120 ac Type II 24-hr 10 yr Rainfall=5.55"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 22HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Area 1 Pre Runoff = 8.03 cfs @ 12.03 hrs, Volume= 0.410 af, Depth> 1.54" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10 yr Rainfall=5.55" Area (ac) CN Description * 0.000 55 * 0.000 48 * 3.200 61 * 0.000 98 3.200 61 Weighted Average 3.200 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 1S: Area 1 Pre Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)8 7 6 5 4 3 2 1 0 Type II 24-hr 10 yr Rainfall=5.55" Runoff Area=3.200 ac Runoff Volume=0.410 af Runoff Depth>1.54" Tc=10.0 min CN=61 8.03 cfs Type II 24-hr 10 yr Rainfall=5.55"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 23HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Area 1 Pre Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.44 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.00 0.00 8.00 0.67 0.00 0.00 8.25 0.70 0.00 0.00 8.50 0.73 0.00 0.00 8.75 0.77 0.00 0.00 9.00 0.82 0.00 0.00 9.25 0.86 0.00 0.00 9.50 0.90 0.00 0.00 9.75 0.95 0.00 0.00 10.00 1.00 0.00 0.00 10.25 1.06 0.00 0.00 10.50 1.13 0.00 0.00 10.75 1.21 0.00 0.00 11.00 1.30 0.00 0.00 11.25 1.42 0.00 0.03 11.50 1.57 0.01 0.11 11.75 2.15 0.10 0.89 12.00 3.68 0.66 7.75 12.25 3.92 0.77 2.05 12.50 4.08 0.85 1.11 12.75 4.19 0.91 0.78 13.00 4.28 0.96 0.66 13.25 4.36 1.00 0.57 13.50 4.43 1.04 0.50 13.75 4.50 1.08 0.45 14.00 4.55 1.11 0.40 14.25 4.60 1.14 0.37 14.50 4.65 1.16 0.35 14.75 4.69 1.19 0.34 15.00 4.74 1.21 0.32 15.25 4.78 1.24 0.30 15.50 4.82 1.26 0.29 15.75 4.85 1.28 0.27 16.00 4.88 1.30 0.25 16.25 4.92 1.32 0.24 16.50 4.95 1.34 0.24 16.75 4.98 1.35 0.23 17.00 5.00 1.37 0.22 17.25 5.03 1.39 0.22 17.50 5.06 1.41 0.21 17.75 5.09 1.42 0.21 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 5.11 1.44 0.20 18.25 5.14 1.45 0.19 18.50 5.16 1.47 0.19 18.75 5.18 1.48 0.18 19.00 5.20 1.49 0.17 19.25 5.23 1.51 0.17 19.50 5.25 1.52 0.16 19.75 5.27 1.53 0.16 20.00 5.28 1.54 0.15 Type II 24-hr 10 yr Rainfall=5.55"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 24HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 2S: Area 2 Pre Runoff = 88.96 cfs @ 12.03 hrs, Volume= 4.585 af, Depth> 1.39" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10 yr Rainfall=5.55" Area (ac) CN Description * 19.830 55 * 0.000 48 * 18.180 61 * 1.500 98 39.510 59 Weighted Average 38.010 96.20% Pervious Area 1.500 3.80% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 2S: Area 2 Pre Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)95 90 85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 0 Type II 24-hr 10 yr Rainfall=5.55" Runoff Area=39.510 ac Runoff Volume=4.585 af Runoff Depth>1.39" Tc=10.0 min CN=59 88.96 cfs Type II 24-hr 10 yr Rainfall=5.55"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 25HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 2S: Area 2 Pre Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.44 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.00 0.00 8.00 0.67 0.00 0.00 8.25 0.70 0.00 0.00 8.50 0.73 0.00 0.00 8.75 0.77 0.00 0.00 9.00 0.82 0.00 0.00 9.25 0.86 0.00 0.00 9.50 0.90 0.00 0.00 9.75 0.95 0.00 0.00 10.00 1.00 0.00 0.00 10.25 1.06 0.00 0.00 10.50 1.13 0.00 0.00 10.75 1.21 0.00 0.00 11.00 1.30 0.00 0.00 11.25 1.42 0.00 0.00 11.50 1.57 0.00 0.59 11.75 2.15 0.07 8.11 12.00 3.68 0.57 85.26 12.25 3.92 0.67 23.23 12.50 4.08 0.75 12.73 12.75 4.19 0.80 8.91 13.00 4.28 0.85 7.57 13.25 4.36 0.89 6.53 13.50 4.43 0.93 5.81 13.75 4.50 0.96 5.18 14.00 4.55 0.99 4.65 14.25 4.60 1.01 4.26 14.50 4.65 1.04 4.08 14.75 4.69 1.06 3.91 15.00 4.74 1.09 3.73 15.25 4.78 1.11 3.54 15.50 4.82 1.13 3.35 15.75 4.85 1.15 3.16 16.00 4.88 1.17 2.96 16.25 4.92 1.19 2.81 16.50 4.95 1.20 2.75 16.75 4.98 1.22 2.68 17.00 5.00 1.24 2.61 17.25 5.03 1.25 2.55 17.50 5.06 1.27 2.48 17.75 5.09 1.28 2.41 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 5.11 1.30 2.34 18.25 5.14 1.31 2.26 18.50 5.16 1.33 2.19 18.75 5.18 1.34 2.12 19.00 5.20 1.35 2.04 19.25 5.23 1.36 1.97 19.50 5.25 1.38 1.89 19.75 5.27 1.39 1.82 20.00 5.28 1.40 1.74 Type II 24-hr 10 yr Rainfall=5.55"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 26HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: Area 3 Pre Runoff = 182.73 cfs @ 12.03 hrs, Volume= 9.552 af, Depth> 1.25" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10 yr Rainfall=5.55" Area (ac) CN Description * 27.400 55 * 17.000 48 * 46.030 61 * 1.000 98 91.430 57 Weighted Average 90.430 98.91% Pervious Area 1.000 1.09% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 3S: Area 3 Pre Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)200 190 180 170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 Type II 24-hr 10 yr Rainfall=5.55" Runoff Area=91.430 ac Runoff Volume=9.552 af Runoff Depth>1.25" Tc=10.0 min CN=57 182.73 cfs Type II 24-hr 10 yr Rainfall=5.55"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 27HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 3S: Area 3 Pre Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.44 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.00 0.00 8.00 0.67 0.00 0.00 8.25 0.70 0.00 0.00 8.50 0.73 0.00 0.00 8.75 0.77 0.00 0.00 9.00 0.82 0.00 0.00 9.25 0.86 0.00 0.00 9.50 0.90 0.00 0.00 9.75 0.95 0.00 0.00 10.00 1.00 0.00 0.00 10.25 1.06 0.00 0.00 10.50 1.13 0.00 0.00 10.75 1.21 0.00 0.00 11.00 1.30 0.00 0.00 11.25 1.42 0.00 0.00 11.50 1.57 0.00 0.05 11.75 2.15 0.05 12.28 12.00 3.68 0.49 173.49 12.25 3.92 0.58 48.99 12.50 4.08 0.65 27.14 12.75 4.19 0.70 19.08 13.00 4.28 0.75 16.23 13.25 4.36 0.78 14.03 13.50 4.43 0.82 12.51 13.75 4.50 0.85 11.16 14.00 4.55 0.87 10.03 14.25 4.60 0.90 9.21 14.50 4.65 0.92 8.82 14.75 4.69 0.95 8.45 15.00 4.74 0.97 8.06 15.25 4.78 0.99 7.67 15.50 4.82 1.01 7.26 15.75 4.85 1.03 6.84 16.00 4.88 1.04 6.42 16.25 4.92 1.06 6.11 16.50 4.95 1.08 5.96 16.75 4.98 1.09 5.82 17.00 5.00 1.11 5.68 17.25 5.03 1.12 5.54 17.50 5.06 1.14 5.39 17.75 5.09 1.15 5.24 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 5.11 1.16 5.09 18.25 5.14 1.18 4.93 18.50 5.16 1.19 4.78 18.75 5.18 1.20 4.62 19.00 5.20 1.22 4.46 19.25 5.23 1.23 4.30 19.50 5.25 1.24 4.13 19.75 5.27 1.25 3.97 20.00 5.28 1.26 3.80 Type II 24-hr 10 yr Rainfall=5.55"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 28HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 4S: Area 4 Pre Runoff = 139.74 cfs @ 12.03 hrs, Volume= 7.107 af, Depth> 1.61" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10 yr Rainfall=5.55" Area (ac) CN Description * 2.400 55 * 0.000 48 * 49.160 61 * 1.400 98 52.960 62 Weighted Average 51.560 97.36% Pervious Area 1.400 2.64% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 4S: Area 4 Pre Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 Type II 24-hr 10 yr Rainfall=5.55" Runoff Area=52.960 ac Runoff Volume=7.107 af Runoff Depth>1.61" Tc=10.0 min CN=62 139.74 cfs Type II 24-hr 10 yr Rainfall=5.55"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 29HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 4S: Area 4 Pre Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.44 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.00 0.00 8.00 0.67 0.00 0.00 8.25 0.70 0.00 0.00 8.50 0.73 0.00 0.00 8.75 0.77 0.00 0.00 9.00 0.82 0.00 0.00 9.25 0.86 0.00 0.00 9.50 0.90 0.00 0.00 9.75 0.95 0.00 0.00 10.00 1.00 0.00 0.00 10.25 1.06 0.00 0.00 10.50 1.13 0.00 0.00 10.75 1.21 0.00 0.00 11.00 1.30 0.00 0.16 11.25 1.42 0.01 0.94 11.50 1.57 0.02 2.42 11.75 2.15 0.12 16.80 12.00 3.68 0.70 135.33 12.25 3.92 0.82 35.29 12.50 4.08 0.91 19.05 12.75 4.19 0.97 13.28 13.00 4.28 1.02 11.24 13.25 4.36 1.06 9.67 13.50 4.43 1.10 8.60 13.75 4.50 1.14 7.64 14.00 4.55 1.17 6.85 14.25 4.60 1.20 6.28 14.50 4.65 1.23 6.00 14.75 4.69 1.25 5.74 15.00 4.74 1.28 5.47 15.25 4.78 1.30 5.19 15.50 4.82 1.33 4.91 15.75 4.85 1.35 4.62 16.00 4.88 1.37 4.33 16.25 4.92 1.39 4.11 16.50 4.95 1.41 4.01 16.75 4.98 1.42 3.91 17.00 5.00 1.44 3.81 17.25 5.03 1.46 3.71 17.50 5.06 1.48 3.61 17.75 5.09 1.49 3.51 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 5.11 1.51 3.40 18.25 5.14 1.52 3.30 18.50 5.16 1.54 3.19 18.75 5.18 1.55 3.08 19.00 5.20 1.57 2.97 19.25 5.23 1.58 2.86 19.50 5.25 1.59 2.75 19.75 5.27 1.60 2.64 20.00 5.28 1.62 2.53 Type II 24-hr 10 yr Rainfall=5.55"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 30HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 5S: Area 5 Pre Runoff = 53.08 cfs @ 12.03 hrs, Volume= 2.710 af, Depth> 1.54" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10 yr Rainfall=5.55" Area (ac) CN Description * 3.500 55 * 0.000 48 * 17.260 61 * 0.400 98 21.160 61 Weighted Average 20.760 98.11% Pervious Area 0.400 1.89% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 5S: Area 5 Pre Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)55 50 45 40 35 30 25 20 15 10 5 0 Type II 24-hr 10 yr Rainfall=5.55" Runoff Area=21.160 ac Runoff Volume=2.710 af Runoff Depth>1.54" Tc=10.0 min CN=61 53.08 cfs Type II 24-hr 10 yr Rainfall=5.55"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 31HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 5S: Area 5 Pre Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.44 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.00 0.00 8.00 0.67 0.00 0.00 8.25 0.70 0.00 0.00 8.50 0.73 0.00 0.00 8.75 0.77 0.00 0.00 9.00 0.82 0.00 0.00 9.25 0.86 0.00 0.00 9.50 0.90 0.00 0.00 9.75 0.95 0.00 0.00 10.00 1.00 0.00 0.00 10.25 1.06 0.00 0.00 10.50 1.13 0.00 0.00 10.75 1.21 0.00 0.00 11.00 1.30 0.00 0.00 11.25 1.42 0.00 0.21 11.50 1.57 0.01 0.74 11.75 2.15 0.10 5.91 12.00 3.68 0.66 51.25 12.25 3.92 0.77 13.55 12.50 4.08 0.85 7.35 12.75 4.19 0.91 5.13 13.00 4.28 0.96 4.35 13.25 4.36 1.00 3.74 13.50 4.43 1.04 3.33 13.75 4.50 1.08 2.96 14.00 4.55 1.11 2.66 14.25 4.60 1.14 2.43 14.50 4.65 1.16 2.33 14.75 4.69 1.19 2.23 15.00 4.74 1.21 2.12 15.25 4.78 1.24 2.02 15.50 4.82 1.26 1.91 15.75 4.85 1.28 1.79 16.00 4.88 1.30 1.68 16.25 4.92 1.32 1.60 16.50 4.95 1.34 1.56 16.75 4.98 1.35 1.52 17.00 5.00 1.37 1.48 17.25 5.03 1.39 1.44 17.50 5.06 1.41 1.40 17.75 5.09 1.42 1.36 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 5.11 1.44 1.32 18.25 5.14 1.45 1.28 18.50 5.16 1.47 1.24 18.75 5.18 1.48 1.20 19.00 5.20 1.49 1.16 19.25 5.23 1.51 1.11 19.50 5.25 1.52 1.07 19.75 5.27 1.53 1.03 20.00 5.28 1.54 0.98 Type II 24-hr 10 yr Rainfall=5.55"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 32HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 6S: Area 6 Pre Runoff = 6.61 cfs @ 12.02 hrs, Volume= 0.333 af, Depth> 2.00" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10 yr Rainfall=5.55" Area (ac) CN Description * 0.000 55 * 0.000 48 * 1.700 61 * 0.300 98 2.000 67 Weighted Average 1.700 85.00% Pervious Area 0.300 15.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 6S: Area 6 Pre Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)7 6 5 4 3 2 1 0 Type II 24-hr 10 yr Rainfall=5.55" Runoff Area=2.000 ac Runoff Volume=0.333 af Runoff Depth>2.00" Tc=10.0 min CN=67 6.61 cfs Type II 24-hr 10 yr Rainfall=5.55"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 33HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 6S: Area 6 Pre Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.44 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.00 0.00 8.00 0.67 0.00 0.00 8.25 0.70 0.00 0.00 8.50 0.73 0.00 0.00 8.75 0.77 0.00 0.00 9.00 0.82 0.00 0.00 9.25 0.86 0.00 0.00 9.50 0.90 0.00 0.00 9.75 0.95 0.00 0.00 10.00 1.00 0.00 0.00 10.25 1.06 0.00 0.01 10.50 1.13 0.00 0.02 10.75 1.21 0.01 0.04 11.00 1.30 0.02 0.07 11.25 1.42 0.04 0.12 11.50 1.57 0.06 0.20 11.75 2.15 0.22 1.04 12.00 3.68 0.95 6.47 12.25 3.92 1.10 1.59 12.50 4.08 1.19 0.84 12.75 4.19 1.26 0.58 13.00 4.28 1.32 0.49 13.25 4.36 1.38 0.42 13.50 4.43 1.42 0.37 13.75 4.50 1.46 0.33 14.00 4.55 1.50 0.30 14.25 4.60 1.53 0.27 14.50 4.65 1.56 0.26 14.75 4.69 1.59 0.25 15.00 4.74 1.62 0.24 15.25 4.78 1.65 0.22 15.50 4.82 1.68 0.21 15.75 4.85 1.70 0.20 16.00 4.88 1.72 0.19 16.25 4.92 1.74 0.18 16.50 4.95 1.77 0.17 16.75 4.98 1.79 0.17 17.00 5.00 1.81 0.16 17.25 5.03 1.83 0.16 17.50 5.06 1.84 0.15 17.75 5.09 1.86 0.15 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 5.11 1.88 0.14 18.25 5.14 1.90 0.14 18.50 5.16 1.92 0.14 18.75 5.18 1.93 0.13 19.00 5.20 1.95 0.13 19.25 5.23 1.96 0.12 19.50 5.25 1.98 0.12 19.75 5.27 1.99 0.11 20.00 5.28 2.00 0.11 Type II 24-hr 10 yr Rainfall=5.55"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 34HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 7S: Area 7 Pre Runoff = 45.53 cfs @ 12.03 hrs, Volume= 2.324 af, Depth> 1.54" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10 yr Rainfall=5.55" Area (ac) CN Description * 1.600 55 * 0.000 48 * 16.050 61 * 0.500 98 18.150 61 Weighted Average 17.650 97.25% Pervious Area 0.500 2.75% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 7S: Area 7 Pre Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Type II 24-hr 10 yr Rainfall=5.55" Runoff Area=18.150 ac Runoff Volume=2.324 af Runoff Depth>1.54" Tc=10.0 min CN=61 45.53 cfs Type II 24-hr 10 yr Rainfall=5.55"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 35HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 7S: Area 7 Pre Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.44 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.00 0.00 8.00 0.67 0.00 0.00 8.25 0.70 0.00 0.00 8.50 0.73 0.00 0.00 8.75 0.77 0.00 0.00 9.00 0.82 0.00 0.00 9.25 0.86 0.00 0.00 9.50 0.90 0.00 0.00 9.75 0.95 0.00 0.00 10.00 1.00 0.00 0.00 10.25 1.06 0.00 0.00 10.50 1.13 0.00 0.00 10.75 1.21 0.00 0.00 11.00 1.30 0.00 0.00 11.25 1.42 0.00 0.18 11.50 1.57 0.01 0.64 11.75 2.15 0.10 5.07 12.00 3.68 0.66 43.96 12.25 3.92 0.77 11.62 12.50 4.08 0.85 6.30 12.75 4.19 0.91 4.40 13.00 4.28 0.96 3.73 13.25 4.36 1.00 3.21 13.50 4.43 1.04 2.86 13.75 4.50 1.08 2.54 14.00 4.55 1.11 2.28 14.25 4.60 1.14 2.09 14.50 4.65 1.16 2.00 14.75 4.69 1.19 1.91 15.00 4.74 1.21 1.82 15.25 4.78 1.24 1.73 15.50 4.82 1.26 1.63 15.75 4.85 1.28 1.54 16.00 4.88 1.30 1.44 16.25 4.92 1.32 1.37 16.50 4.95 1.34 1.34 16.75 4.98 1.35 1.30 17.00 5.00 1.37 1.27 17.25 5.03 1.39 1.24 17.50 5.06 1.41 1.20 17.75 5.09 1.42 1.17 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 5.11 1.44 1.14 18.25 5.14 1.45 1.10 18.50 5.16 1.47 1.06 18.75 5.18 1.48 1.03 19.00 5.20 1.49 0.99 19.25 5.23 1.51 0.96 19.50 5.25 1.52 0.92 19.75 5.27 1.53 0.88 20.00 5.28 1.54 0.84 Type II 24-hr 10 yr Rainfall=5.55"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 36HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 8S: Area 8 Pre Runoff = 0.64 cfs @ 12.02 hrs, Volume= 0.032 af, Depth> 1.76" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10 yr Rainfall=5.55" Area (ac) CN Description * 0.000 55 * 0.000 48 * 0.200 61 * 0.020 98 0.220 64 Weighted Average 0.200 90.91% Pervious Area 0.020 9.09% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 8S: Area 8 Pre Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Type II 24-hr 10 yr Rainfall=5.55" Runoff Area=0.220 ac Runoff Volume=0.032 af Runoff Depth>1.76" Tc=10.0 min CN=64 0.64 cfs Type II 24-hr 10 yr Rainfall=5.55"Birdwood Pre Printed 6/27/2018Prepared by Timmons Group Page 37HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 8S: Area 8 Pre Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.44 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.00 0.00 8.00 0.67 0.00 0.00 8.25 0.70 0.00 0.00 8.50 0.73 0.00 0.00 8.75 0.77 0.00 0.00 9.00 0.82 0.00 0.00 9.25 0.86 0.00 0.00 9.50 0.90 0.00 0.00 9.75 0.95 0.00 0.00 10.00 1.00 0.00 0.00 10.25 1.06 0.00 0.00 10.50 1.13 0.00 0.00 10.75 1.21 0.00 0.00 11.00 1.30 0.01 0.00 11.25 1.42 0.01 0.01 11.50 1.57 0.03 0.01 11.75 2.15 0.16 0.09 12.00 3.68 0.80 0.62 12.25 3.92 0.93 0.16 12.50 4.08 1.02 0.08 12.75 4.19 1.08 0.06 13.00 4.28 1.14 0.05 13.25 4.36 1.18 0.04 13.50 4.43 1.23 0.04 13.75 4.50 1.26 0.03 14.00 4.55 1.30 0.03 14.25 4.60 1.33 0.03 14.50 4.65 1.36 0.03 14.75 4.69 1.39 0.03 15.00 4.74 1.41 0.02 15.25 4.78 1.44 0.02 15.50 4.82 1.46 0.02 15.75 4.85 1.48 0.02 16.00 4.88 1.51 0.02 16.25 4.92 1.53 0.02 16.50 4.95 1.55 0.02 16.75 4.98 1.56 0.02 17.00 5.00 1.58 0.02 17.25 5.03 1.60 0.02 17.50 5.06 1.62 0.02 17.75 5.09 1.64 0.02 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 5.11 1.65 0.01 18.25 5.14 1.67 0.01 18.50 5.16 1.69 0.01 18.75 5.18 1.70 0.01 19.00 5.20 1.71 0.01 19.25 5.23 1.73 0.01 19.50 5.25 1.74 0.01 19.75 5.27 1.76 0.01 20.00 5.28 1.77 0.01 1S Area 1 Post 2S Area 2 Post 3S Area 3 Post 4S Area 4 Post 5S Area 5 Post 6S Area 6 Post 7S Area 7 Post 8S Area 8 Post Routing Diagram for Birdwood Post Prepared by Timmons Group, Printed 6/27/2018 HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Subcat Reach Pond Link Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 2HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (acres) CN Description (subcatchment-numbers) 73.500 48 (1S, 2S, 3S, 4S, 5S, 6S, 7S) 9.730 55 (2S, 3S, 5S) 140.400 61 (2S, 3S, 4S, 5S, 6S, 7S, 8S) 5.000 98 (2S, 3S, 4S, 5S, 7S) 228.630 57 TOTAL AREA Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 3HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Ground Covers (all nodes) HSG-A (acres) HSG-B (acres) HSG-C (acres) HSG-D (acres) Other (acres) Total (acres) Ground Cover Subcatchment Numbers 0.000 0.000 0.000 0.000 228.630 228.630 1S, 2S, 3S, 4S, 5S, 6S, 7S, 8S 0.000 0.000 0.000 0.000 228.630 228.630 TOTAL AREA Type II 24-hr 1yr Rainfall=3.04"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 4HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 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=3.200 ac 0.00% Impervious Runoff Depth>0.05"Subcatchment 1S: Area 1 Post Tc=10.0 min CN=48 Runoff=0.02 cfs 0.012 af Runoff Area=39.510 ac 5.57% Impervious Runoff Depth>0.21"Subcatchment 2S: Area 2 Post Tc=10.0 min CN=57 Runoff=7.34 cfs 0.703 af Runoff Area=91.430 ac 1.53% Impervious Runoff Depth>0.19"Subcatchment 3S: Area 3 Post Tc=10.0 min CN=56 Runoff=12.69 cfs 1.441 af Runoff Area=52.960 ac 0.38% Impervious Runoff Depth>0.27"Subcatchment 4S: Area 4 Post Tc=10.0 min CN=59 Runoff=15.09 cfs 1.174 af Runoff Area=21.160 ac 2.36% Impervious Runoff Depth>0.27"Subcatchment 5S: Area 5 Post Tc=10.0 min CN=59 Runoff=6.03 cfs 0.469 af Runoff Area=2.000 ac 0.00% Impervious Runoff Depth>0.21"Subcatchment 6S: Area 6 Post Tc=10.0 min CN=57 Runoff=0.37 cfs 0.036 af Runoff Area=18.150 ac 3.86% Impervious Runoff Depth>0.24"Subcatchment 7S: Area 7 Post Tc=10.0 min CN=58 Runoff=4.24 cfs 0.362 af Runoff Area=0.220 ac 0.00% Impervious Runoff Depth>0.32"Subcatchment 8S: Area 8 Post Tc=10.0 min CN=61 Runoff=0.09 cfs 0.006 af Total Runoff Area = 228.630 ac Runoff Volume = 4.202 af Average Runoff Depth = 0.22" 97.81% Pervious = 223.630 ac 2.19% Impervious = 5.000 ac Type II 24-hr 1yr Rainfall=3.04"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 5HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Area 1 Post Runoff = 0.02 cfs @ 14.93 hrs, Volume= 0.012 af, Depth> 0.05" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1yr Rainfall=3.04" Area (ac) CN Description * 0.000 55 * 3.200 48 * 0.000 61 * 0.000 98 3.200 48 Weighted Average 3.200 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 1S: Area 1 Post Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)0.024 0.023 0.022 0.021 0.02 0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 Type II 24-hr 1yr Rainfall=3.04" Runoff Area=3.200 ac Runoff Volume=0.012 af Runoff Depth>0.05" Tc=10.0 min CN=48 0.02 cfs Type II 24-hr 1yr Rainfall=3.04"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 6HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Area 1 Post Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.36 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.00 0.00 10.75 0.66 0.00 0.00 11.00 0.71 0.00 0.00 11.25 0.78 0.00 0.00 11.50 0.86 0.00 0.00 11.75 1.18 0.00 0.00 12.00 2.02 0.00 0.00 12.25 2.15 0.00 0.00 12.50 2.23 0.00 0.00 12.75 2.30 0.00 0.01 13.00 2.35 0.00 0.02 13.25 2.39 0.00 0.02 13.50 2.43 0.01 0.02 13.75 2.46 0.01 0.02 14.00 2.49 0.01 0.02 14.25 2.52 0.01 0.02 14.50 2.55 0.01 0.02 14.75 2.57 0.01 0.02 15.00 2.59 0.02 0.02 15.25 2.62 0.02 0.02 15.50 2.64 0.02 0.02 15.75 2.66 0.02 0.02 16.00 2.68 0.02 0.02 16.25 2.69 0.02 0.02 16.50 2.71 0.03 0.02 16.75 2.73 0.03 0.02 17.00 2.74 0.03 0.02 17.25 2.76 0.03 0.02 17.50 2.77 0.03 0.02 17.75 2.79 0.03 0.02 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 2.80 0.03 0.02 18.25 2.81 0.04 0.02 18.50 2.83 0.04 0.02 18.75 2.84 0.04 0.02 19.00 2.85 0.04 0.02 19.25 2.86 0.04 0.02 19.50 2.87 0.04 0.02 19.75 2.88 0.04 0.02 20.00 2.89 0.05 0.02 Type II 24-hr 1yr Rainfall=3.04"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 7HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 2S: Area 2 Post Runoff = 7.34 cfs @ 12.07 hrs, Volume= 0.703 af, Depth> 0.21" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1yr Rainfall=3.04" Area (ac) CN Description * 3.630 55 * 17.000 48 * 16.680 61 * 2.200 98 39.510 57 Weighted Average 37.310 94.43% Pervious Area 2.200 5.57% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 2S: Area 2 Post Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)8 7 6 5 4 3 2 1 0 Type II 24-hr 1yr Rainfall=3.04" Runoff Area=39.510 ac Runoff Volume=0.703 af Runoff Depth>0.21" Tc=10.0 min CN=57 7.34 cfs Type II 24-hr 1yr Rainfall=3.04"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 8HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 2S: Area 2 Post Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.36 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.00 0.00 10.75 0.66 0.00 0.00 11.00 0.71 0.00 0.00 11.25 0.78 0.00 0.00 11.50 0.86 0.00 0.00 11.75 1.18 0.00 0.00 12.00 2.02 0.03 4.41 12.25 2.15 0.05 3.37 12.50 2.23 0.06 2.32 12.75 2.30 0.07 1.74 13.00 2.35 0.08 1.54 13.25 2.39 0.09 1.37 13.50 2.43 0.10 1.25 13.75 2.46 0.11 1.14 14.00 2.49 0.11 1.04 14.25 2.52 0.12 0.97 14.50 2.55 0.13 0.94 14.75 2.57 0.13 0.91 15.00 2.59 0.14 0.88 15.25 2.62 0.14 0.84 15.50 2.64 0.15 0.81 15.75 2.66 0.15 0.77 16.00 2.68 0.16 0.72 16.25 2.69 0.16 0.69 16.50 2.71 0.16 0.68 16.75 2.73 0.17 0.67 17.00 2.74 0.17 0.66 17.25 2.76 0.18 0.64 17.50 2.77 0.18 0.63 17.75 2.79 0.18 0.62 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 2.80 0.19 0.60 18.25 2.81 0.19 0.58 18.50 2.83 0.20 0.57 18.75 2.84 0.20 0.55 19.00 2.85 0.20 0.53 19.25 2.86 0.21 0.52 19.50 2.87 0.21 0.50 19.75 2.88 0.21 0.48 20.00 2.89 0.21 0.46 Type II 24-hr 1yr Rainfall=3.04"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 9HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: Area 3 Post Runoff = 12.69 cfs @ 12.08 hrs, Volume= 1.441 af, Depth> 0.19" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1yr Rainfall=3.04" Area (ac) CN Description * 2.600 55 * 36.200 48 * 51.230 61 * 1.400 98 91.430 56 Weighted Average 90.030 98.47% Pervious Area 1.400 1.53% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 3S: Area 3 Post Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Type II 24-hr 1yr Rainfall=3.04" Runoff Area=91.430 ac Runoff Volume=1.441 af Runoff Depth>0.19" Tc=10.0 min CN=56 12.69 cfs Type II 24-hr 1yr Rainfall=3.04"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 10HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 3S: Area 3 Post Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.36 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.00 0.00 10.75 0.66 0.00 0.00 11.00 0.71 0.00 0.00 11.25 0.78 0.00 0.00 11.50 0.86 0.00 0.00 11.75 1.18 0.00 0.00 12.00 2.02 0.02 6.92 12.25 2.15 0.04 6.63 12.50 2.23 0.05 4.75 12.75 2.30 0.06 3.59 13.00 2.35 0.07 3.20 13.25 2.39 0.08 2.86 13.50 2.43 0.08 2.63 13.75 2.46 0.09 2.40 14.00 2.49 0.10 2.20 14.25 2.52 0.10 2.05 14.50 2.55 0.11 1.99 14.75 2.57 0.11 1.93 15.00 2.59 0.12 1.87 15.25 2.62 0.12 1.80 15.50 2.64 0.13 1.72 15.75 2.66 0.13 1.64 16.00 2.68 0.14 1.55 16.25 2.69 0.14 1.48 16.50 2.71 0.14 1.46 16.75 2.73 0.15 1.44 17.00 2.74 0.15 1.41 17.25 2.76 0.16 1.38 17.50 2.77 0.16 1.35 17.75 2.79 0.16 1.32 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 2.80 0.17 1.29 18.25 2.81 0.17 1.26 18.50 2.83 0.17 1.23 18.75 2.84 0.18 1.19 19.00 2.85 0.18 1.15 19.25 2.86 0.18 1.12 19.50 2.87 0.19 1.08 19.75 2.88 0.19 1.04 20.00 2.89 0.19 1.00 Type II 24-hr 1yr Rainfall=3.04"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 11HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 4S: Area 4 Post Runoff = 15.09 cfs @ 12.06 hrs, Volume= 1.174 af, Depth> 0.27" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1yr Rainfall=3.04" Area (ac) CN Description * 0.000 55 * 7.500 48 * 45.260 61 * 0.200 98 52.960 59 Weighted Average 52.760 99.62% Pervious Area 0.200 0.38% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 4S: Area 4 Post Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Type II 24-hr 1yr Rainfall=3.04" Runoff Area=52.960 ac Runoff Volume=1.174 af Runoff Depth>0.27" Tc=10.0 min CN=59 15.09 cfs Type II 24-hr 1yr Rainfall=3.04"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 12HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 4S: Area 4 Post Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.36 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.00 0.00 10.75 0.66 0.00 0.00 11.00 0.71 0.00 0.00 11.25 0.78 0.00 0.00 11.50 0.86 0.00 0.00 11.75 1.18 0.00 0.00 12.00 2.02 0.05 10.79 12.25 2.15 0.07 5.94 12.50 2.23 0.09 3.85 12.75 2.30 0.10 2.83 13.00 2.35 0.12 2.48 13.25 2.39 0.13 2.19 13.50 2.43 0.14 1.99 13.75 2.46 0.14 1.80 14.00 2.49 0.15 1.64 14.25 2.52 0.16 1.52 14.50 2.55 0.17 1.47 14.75 2.57 0.17 1.42 15.00 2.59 0.18 1.37 15.25 2.62 0.18 1.31 15.50 2.64 0.19 1.25 15.75 2.66 0.20 1.18 16.00 2.68 0.20 1.12 16.25 2.69 0.21 1.07 16.50 2.71 0.21 1.05 16.75 2.73 0.22 1.03 17.00 2.74 0.22 1.01 17.25 2.76 0.22 0.99 17.50 2.77 0.23 0.96 17.75 2.79 0.23 0.94 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 2.80 0.24 0.92 18.25 2.81 0.24 0.89 18.50 2.83 0.25 0.87 18.75 2.84 0.25 0.84 19.00 2.85 0.25 0.82 19.25 2.86 0.26 0.79 19.50 2.87 0.26 0.76 19.75 2.88 0.26 0.73 20.00 2.89 0.27 0.70 Type II 24-hr 1yr Rainfall=3.04"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 13HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 5S: Area 5 Post Runoff = 6.03 cfs @ 12.06 hrs, Volume= 0.469 af, Depth> 0.27" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1yr Rainfall=3.04" Area (ac) CN Description * 3.500 55 * 3.300 48 * 13.860 61 * 0.500 98 21.160 59 Weighted Average 20.660 97.64% Pervious Area 0.500 2.36% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 5S: Area 5 Post Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)6 5 4 3 2 1 0 Type II 24-hr 1yr Rainfall=3.04" Runoff Area=21.160 ac Runoff Volume=0.469 af Runoff Depth>0.27" Tc=10.0 min CN=59 6.03 cfs Type II 24-hr 1yr Rainfall=3.04"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 14HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 5S: Area 5 Post Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.36 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.00 0.00 10.75 0.66 0.00 0.00 11.00 0.71 0.00 0.00 11.25 0.78 0.00 0.00 11.50 0.86 0.00 0.00 11.75 1.18 0.00 0.00 12.00 2.02 0.05 4.31 12.25 2.15 0.07 2.37 12.50 2.23 0.09 1.54 12.75 2.30 0.10 1.13 13.00 2.35 0.12 0.99 13.25 2.39 0.13 0.87 13.50 2.43 0.14 0.79 13.75 2.46 0.14 0.72 14.00 2.49 0.15 0.65 14.25 2.52 0.16 0.61 14.50 2.55 0.17 0.59 14.75 2.57 0.17 0.57 15.00 2.59 0.18 0.55 15.25 2.62 0.18 0.52 15.50 2.64 0.19 0.50 15.75 2.66 0.20 0.47 16.00 2.68 0.20 0.45 16.25 2.69 0.21 0.43 16.50 2.71 0.21 0.42 16.75 2.73 0.22 0.41 17.00 2.74 0.22 0.40 17.25 2.76 0.22 0.39 17.50 2.77 0.23 0.39 17.75 2.79 0.23 0.38 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 2.80 0.24 0.37 18.25 2.81 0.24 0.36 18.50 2.83 0.25 0.35 18.75 2.84 0.25 0.34 19.00 2.85 0.25 0.33 19.25 2.86 0.26 0.31 19.50 2.87 0.26 0.30 19.75 2.88 0.26 0.29 20.00 2.89 0.27 0.28 Type II 24-hr 1yr Rainfall=3.04"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 15HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 6S: Area 6 Post Runoff = 0.37 cfs @ 12.07 hrs, Volume= 0.036 af, Depth> 0.21" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1yr Rainfall=3.04" Area (ac) CN Description * 0.000 55 * 0.600 48 * 1.400 61 * 0.000 98 2.000 57 Weighted Average 2.000 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 6S: Area 6 Post Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Type II 24-hr 1yr Rainfall=3.04" Runoff Area=2.000 ac Runoff Volume=0.036 af Runoff Depth>0.21" Tc=10.0 min CN=57 0.37 cfs Type II 24-hr 1yr Rainfall=3.04"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 16HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 6S: Area 6 Post Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.36 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.00 0.00 10.75 0.66 0.00 0.00 11.00 0.71 0.00 0.00 11.25 0.78 0.00 0.00 11.50 0.86 0.00 0.00 11.75 1.18 0.00 0.00 12.00 2.02 0.03 0.22 12.25 2.15 0.05 0.17 12.50 2.23 0.06 0.12 12.75 2.30 0.07 0.09 13.00 2.35 0.08 0.08 13.25 2.39 0.09 0.07 13.50 2.43 0.10 0.06 13.75 2.46 0.11 0.06 14.00 2.49 0.11 0.05 14.25 2.52 0.12 0.05 14.50 2.55 0.13 0.05 14.75 2.57 0.13 0.05 15.00 2.59 0.14 0.04 15.25 2.62 0.14 0.04 15.50 2.64 0.15 0.04 15.75 2.66 0.15 0.04 16.00 2.68 0.16 0.04 16.25 2.69 0.16 0.04 16.50 2.71 0.16 0.03 16.75 2.73 0.17 0.03 17.00 2.74 0.17 0.03 17.25 2.76 0.18 0.03 17.50 2.77 0.18 0.03 17.75 2.79 0.18 0.03 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 2.80 0.19 0.03 18.25 2.81 0.19 0.03 18.50 2.83 0.20 0.03 18.75 2.84 0.20 0.03 19.00 2.85 0.20 0.03 19.25 2.86 0.21 0.03 19.50 2.87 0.21 0.03 19.75 2.88 0.21 0.02 20.00 2.89 0.21 0.02 Type II 24-hr 1yr Rainfall=3.04"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 17HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 7S: Area 7 Post Runoff = 4.24 cfs @ 12.06 hrs, Volume= 0.362 af, Depth> 0.24" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1yr Rainfall=3.04" Area (ac) CN Description * 0.000 55 * 5.700 48 * 11.750 61 * 0.700 98 18.150 58 Weighted Average 17.450 96.14% Pervious Area 0.700 3.86% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 7S: Area 7 Post Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)4 3 2 1 0 Type II 24-hr 1yr Rainfall=3.04" Runoff Area=18.150 ac Runoff Volume=0.362 af Runoff Depth>0.24" Tc=10.0 min CN=58 4.24 cfs Type II 24-hr 1yr Rainfall=3.04"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 18HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 7S: Area 7 Post Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.36 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.00 0.00 10.75 0.66 0.00 0.00 11.00 0.71 0.00 0.00 11.25 0.78 0.00 0.00 11.50 0.86 0.00 0.00 11.75 1.18 0.00 0.00 12.00 2.02 0.04 2.81 12.25 2.15 0.06 1.79 12.50 2.23 0.08 1.19 12.75 2.30 0.09 0.88 13.00 2.35 0.10 0.78 13.25 2.39 0.11 0.69 13.50 2.43 0.12 0.63 13.75 2.46 0.12 0.57 14.00 2.49 0.13 0.52 14.25 2.52 0.14 0.48 14.50 2.55 0.14 0.47 14.75 2.57 0.15 0.45 15.00 2.59 0.16 0.44 15.25 2.62 0.16 0.42 15.50 2.64 0.17 0.40 15.75 2.66 0.17 0.38 16.00 2.68 0.18 0.36 16.25 2.69 0.18 0.34 16.50 2.71 0.19 0.34 16.75 2.73 0.19 0.33 17.00 2.74 0.20 0.32 17.25 2.76 0.20 0.32 17.50 2.77 0.20 0.31 17.75 2.79 0.21 0.30 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 2.80 0.21 0.30 18.25 2.81 0.22 0.29 18.50 2.83 0.22 0.28 18.75 2.84 0.22 0.27 19.00 2.85 0.23 0.26 19.25 2.86 0.23 0.25 19.50 2.87 0.23 0.24 19.75 2.88 0.24 0.24 20.00 2.89 0.24 0.23 Type II 24-hr 1yr Rainfall=3.04"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 19HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 8S: Area 8 Post Runoff = 0.09 cfs @ 12.05 hrs, Volume= 0.006 af, Depth> 0.32" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1yr Rainfall=3.04" Area (ac) CN Description * 0.000 55 * 0.000 48 * 0.220 61 * 0.000 98 0.220 61 Weighted Average 0.220 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 8S: Area 8 Post Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Type II 24-hr 1yr Rainfall=3.04" Runoff Area=0.220 ac Runoff Volume=0.006 af Runoff Depth>0.32" Tc=10.0 min CN=61 0.09 cfs Type II 24-hr 1yr Rainfall=3.04"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 20HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 8S: Area 8 Post Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.36 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.00 0.00 10.75 0.66 0.00 0.00 11.00 0.71 0.00 0.00 11.25 0.78 0.00 0.00 11.50 0.86 0.00 0.00 11.75 1.18 0.00 0.00 12.00 2.02 0.08 0.07 12.25 2.15 0.10 0.03 12.50 2.23 0.12 0.02 12.75 2.30 0.14 0.01 13.00 2.35 0.15 0.01 13.25 2.39 0.16 0.01 13.50 2.43 0.18 0.01 13.75 2.46 0.19 0.01 14.00 2.49 0.19 0.01 14.25 2.52 0.20 0.01 14.50 2.55 0.21 0.01 14.75 2.57 0.22 0.01 15.00 2.59 0.22 0.01 15.25 2.62 0.23 0.01 15.50 2.64 0.24 0.01 15.75 2.66 0.24 0.01 16.00 2.68 0.25 0.01 16.25 2.69 0.26 0.01 16.50 2.71 0.26 0.00 16.75 2.73 0.27 0.00 17.00 2.74 0.27 0.00 17.25 2.76 0.28 0.00 17.50 2.77 0.28 0.00 17.75 2.79 0.29 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 2.80 0.29 0.00 18.25 2.81 0.30 0.00 18.50 2.83 0.30 0.00 18.75 2.84 0.31 0.00 19.00 2.85 0.31 0.00 19.25 2.86 0.31 0.00 19.50 2.87 0.32 0.00 19.75 2.88 0.32 0.00 20.00 2.89 0.33 0.00 Type II 24-hr 10 yr Rainfall=5.55"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 21HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 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=3.200 ac 0.00% Impervious Runoff Depth>0.69"Subcatchment 1S: Area 1 Post Tc=10.0 min CN=48 Runoff=2.97 cfs 0.185 af Runoff Area=39.510 ac 5.57% Impervious Runoff Depth>1.25"Subcatchment 2S: Area 2 Post Tc=10.0 min CN=57 Runoff=78.96 cfs 4.128 af Runoff Area=91.430 ac 1.53% Impervious Runoff Depth>1.19"Subcatchment 3S: Area 3 Post Tc=10.0 min CN=56 Runoff=171.31 cfs 9.036 af Runoff Area=52.960 ac 0.38% Impervious Runoff Depth>1.39"Subcatchment 4S: Area 4 Post Tc=10.0 min CN=59 Runoff=119.25 cfs 6.146 af Runoff Area=21.160 ac 2.36% Impervious Runoff Depth>1.39"Subcatchment 5S: Area 5 Post Tc=10.0 min CN=59 Runoff=47.64 cfs 2.456 af Runoff Area=2.000 ac 0.00% Impervious Runoff Depth>1.25"Subcatchment 6S: Area 6 Post Tc=10.0 min CN=57 Runoff=4.00 cfs 0.209 af Runoff Area=18.150 ac 3.86% Impervious Runoff Depth>1.32"Subcatchment 7S: Area 7 Post Tc=10.0 min CN=58 Runoff=38.56 cfs 2.000 af Runoff Area=0.220 ac 0.00% Impervious Runoff Depth>1.54"Subcatchment 8S: Area 8 Post Tc=10.0 min CN=61 Runoff=0.55 cfs 0.028 af Total Runoff Area = 228.630 ac Runoff Volume = 24.188 af Average Runoff Depth = 1.27" 97.81% Pervious = 223.630 ac 2.19% Impervious = 5.000 ac Type II 24-hr 10 yr Rainfall=5.55"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 22HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Area 1 Post Runoff = 2.97 cfs @ 12.05 hrs, Volume= 0.185 af, Depth> 0.69" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10 yr Rainfall=5.55" Area (ac) CN Description * 0.000 55 * 3.200 48 * 0.000 61 * 0.000 98 3.200 48 Weighted Average 3.200 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 1S: Area 1 Post Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)3 2 1 0 Type II 24-hr 10 yr Rainfall=5.55" Runoff Area=3.200 ac Runoff Volume=0.185 af Runoff Depth>0.69" Tc=10.0 min CN=48 2.97 cfs Type II 24-hr 10 yr Rainfall=5.55"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 23HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Area 1 Post Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.44 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.00 0.00 8.00 0.67 0.00 0.00 8.25 0.70 0.00 0.00 8.50 0.73 0.00 0.00 8.75 0.77 0.00 0.00 9.00 0.82 0.00 0.00 9.25 0.86 0.00 0.00 9.50 0.90 0.00 0.00 9.75 0.95 0.00 0.00 10.00 1.00 0.00 0.00 10.25 1.06 0.00 0.00 10.50 1.13 0.00 0.00 10.75 1.21 0.00 0.00 11.00 1.30 0.00 0.00 11.25 1.42 0.00 0.00 11.50 1.57 0.00 0.00 11.75 2.15 0.00 0.00 12.00 3.68 0.19 2.52 12.25 3.92 0.24 0.97 12.50 4.08 0.29 0.58 12.75 4.19 0.32 0.42 13.00 4.28 0.35 0.36 13.25 4.36 0.37 0.32 13.50 4.43 0.39 0.29 13.75 4.50 0.41 0.26 14.00 4.55 0.43 0.23 14.25 4.60 0.45 0.22 14.50 4.65 0.46 0.21 14.75 4.69 0.48 0.20 15.00 4.74 0.49 0.19 15.25 4.78 0.51 0.18 15.50 4.82 0.52 0.17 15.75 4.85 0.53 0.16 16.00 4.88 0.54 0.15 16.25 4.92 0.56 0.15 16.50 4.95 0.57 0.14 16.75 4.98 0.58 0.14 17.00 5.00 0.59 0.14 17.25 5.03 0.60 0.14 17.50 5.06 0.61 0.13 17.75 5.09 0.62 0.13 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 5.11 0.63 0.13 18.25 5.14 0.64 0.12 18.50 5.16 0.65 0.12 18.75 5.18 0.66 0.11 19.00 5.20 0.67 0.11 19.25 5.23 0.67 0.11 19.50 5.25 0.68 0.10 19.75 5.27 0.69 0.10 20.00 5.28 0.70 0.09 Type II 24-hr 10 yr Rainfall=5.55"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 24HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 2S: Area 2 Post Runoff = 78.96 cfs @ 12.03 hrs, Volume= 4.128 af, Depth> 1.25" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10 yr Rainfall=5.55" Area (ac) CN Description * 3.630 55 * 17.000 48 * 16.680 61 * 2.200 98 39.510 57 Weighted Average 37.310 94.43% Pervious Area 2.200 5.57% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 2S: Area 2 Post Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 0 Type II 24-hr 10 yr Rainfall=5.55" Runoff Area=39.510 ac Runoff Volume=4.128 af Runoff Depth>1.25" Tc=10.0 min CN=57 78.96 cfs Type II 24-hr 10 yr Rainfall=5.55"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 25HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 2S: Area 2 Post Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.44 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.00 0.00 8.00 0.67 0.00 0.00 8.25 0.70 0.00 0.00 8.50 0.73 0.00 0.00 8.75 0.77 0.00 0.00 9.00 0.82 0.00 0.00 9.25 0.86 0.00 0.00 9.50 0.90 0.00 0.00 9.75 0.95 0.00 0.00 10.00 1.00 0.00 0.00 10.25 1.06 0.00 0.00 10.50 1.13 0.00 0.00 10.75 1.21 0.00 0.00 11.00 1.30 0.00 0.00 11.25 1.42 0.00 0.00 11.50 1.57 0.00 0.02 11.75 2.15 0.05 5.31 12.00 3.68 0.49 74.97 12.25 3.92 0.58 21.17 12.50 4.08 0.65 11.73 12.75 4.19 0.70 8.24 13.00 4.28 0.75 7.01 13.25 4.36 0.78 6.06 13.50 4.43 0.82 5.41 13.75 4.50 0.85 4.82 14.00 4.55 0.87 4.33 14.25 4.60 0.90 3.98 14.50 4.65 0.92 3.81 14.75 4.69 0.95 3.65 15.00 4.74 0.97 3.48 15.25 4.78 0.99 3.31 15.50 4.82 1.01 3.14 15.75 4.85 1.03 2.96 16.00 4.88 1.04 2.77 16.25 4.92 1.06 2.64 16.50 4.95 1.08 2.58 16.75 4.98 1.09 2.52 17.00 5.00 1.11 2.45 17.25 5.03 1.12 2.39 17.50 5.06 1.14 2.33 17.75 5.09 1.15 2.26 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 5.11 1.16 2.20 18.25 5.14 1.18 2.13 18.50 5.16 1.19 2.06 18.75 5.18 1.20 2.00 19.00 5.20 1.22 1.93 19.25 5.23 1.23 1.86 19.50 5.25 1.24 1.79 19.75 5.27 1.25 1.71 20.00 5.28 1.26 1.64 Type II 24-hr 10 yr Rainfall=5.55"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 26HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: Area 3 Post Runoff = 171.31 cfs @ 12.03 hrs, Volume= 9.036 af, Depth> 1.19" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10 yr Rainfall=5.55" Area (ac) CN Description * 2.600 55 * 36.200 48 * 51.230 61 * 1.400 98 91.430 56 Weighted Average 90.030 98.47% Pervious Area 1.400 1.53% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 3S: Area 3 Post Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)190 180 170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 Type II 24-hr 10 yr Rainfall=5.55" Runoff Area=91.430 ac Runoff Volume=9.036 af Runoff Depth>1.19" Tc=10.0 min CN=56 171.31 cfs Type II 24-hr 10 yr Rainfall=5.55"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 27HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 3S: Area 3 Post Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.44 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.00 0.00 8.00 0.67 0.00 0.00 8.25 0.70 0.00 0.00 8.50 0.73 0.00 0.00 8.75 0.77 0.00 0.00 9.00 0.82 0.00 0.00 9.25 0.86 0.00 0.00 9.50 0.90 0.00 0.00 9.75 0.95 0.00 0.00 10.00 1.00 0.00 0.00 10.25 1.06 0.00 0.00 10.50 1.13 0.00 0.00 10.75 1.21 0.00 0.00 11.00 1.30 0.00 0.00 11.25 1.42 0.00 0.00 11.50 1.57 0.00 0.00 11.75 2.15 0.04 9.17 12.00 3.68 0.45 161.72 12.25 3.92 0.54 46.61 12.50 4.08 0.61 25.99 12.75 4.19 0.65 18.30 13.00 4.28 0.70 15.59 13.25 4.36 0.73 13.48 13.50 4.43 0.76 12.04 13.75 4.50 0.79 10.74 14.00 4.55 0.82 9.66 14.25 4.60 0.84 8.87 14.50 4.65 0.87 8.51 14.75 4.69 0.89 8.15 15.00 4.74 0.91 7.78 15.25 4.78 0.93 7.40 15.50 4.82 0.95 7.01 15.75 4.85 0.97 6.61 16.00 4.88 0.98 6.20 16.25 4.92 1.00 5.90 16.50 4.95 1.01 5.77 16.75 4.98 1.03 5.63 17.00 5.00 1.04 5.49 17.25 5.03 1.06 5.36 17.50 5.06 1.07 5.21 17.75 5.09 1.09 5.07 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 5.11 1.10 4.92 18.25 5.14 1.11 4.78 18.50 5.16 1.12 4.63 18.75 5.18 1.14 4.47 19.00 5.20 1.15 4.32 19.25 5.23 1.16 4.16 19.50 5.25 1.17 4.00 19.75 5.27 1.18 3.85 20.00 5.28 1.19 3.68 Type II 24-hr 10 yr Rainfall=5.55"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 28HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 4S: Area 4 Post Runoff = 119.25 cfs @ 12.03 hrs, Volume= 6.146 af, Depth> 1.39" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10 yr Rainfall=5.55" Area (ac) CN Description * 0.000 55 * 7.500 48 * 45.260 61 * 0.200 98 52.960 59 Weighted Average 52.760 99.62% Pervious Area 0.200 0.38% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 4S: Area 4 Post Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)130 120 110 100 90 80 70 60 50 40 30 20 10 0 Type II 24-hr 10 yr Rainfall=5.55" Runoff Area=52.960 ac Runoff Volume=6.146 af Runoff Depth>1.39" Tc=10.0 min CN=59 119.25 cfs Type II 24-hr 10 yr Rainfall=5.55"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 29HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 4S: Area 4 Post Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.44 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.00 0.00 8.00 0.67 0.00 0.00 8.25 0.70 0.00 0.00 8.50 0.73 0.00 0.00 8.75 0.77 0.00 0.00 9.00 0.82 0.00 0.00 9.25 0.86 0.00 0.00 9.50 0.90 0.00 0.00 9.75 0.95 0.00 0.00 10.00 1.00 0.00 0.00 10.25 1.06 0.00 0.00 10.50 1.13 0.00 0.00 10.75 1.21 0.00 0.00 11.00 1.30 0.00 0.00 11.25 1.42 0.00 0.00 11.50 1.57 0.00 0.79 11.75 2.15 0.07 10.87 12.00 3.68 0.57 114.29 12.25 3.92 0.67 31.14 12.50 4.08 0.75 17.06 12.75 4.19 0.80 11.95 13.00 4.28 0.85 10.14 13.25 4.36 0.89 8.75 13.50 4.43 0.93 7.79 13.75 4.50 0.96 6.94 14.00 4.55 0.99 6.23 14.25 4.60 1.01 5.71 14.50 4.65 1.04 5.47 14.75 4.69 1.06 5.24 15.00 4.74 1.09 4.99 15.25 4.78 1.11 4.75 15.50 4.82 1.13 4.49 15.75 4.85 1.15 4.23 16.00 4.88 1.17 3.96 16.25 4.92 1.19 3.77 16.50 4.95 1.20 3.68 16.75 4.98 1.22 3.59 17.00 5.00 1.24 3.50 17.25 5.03 1.25 3.41 17.50 5.06 1.27 3.32 17.75 5.09 1.28 3.23 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 5.11 1.30 3.13 18.25 5.14 1.31 3.04 18.50 5.16 1.33 2.94 18.75 5.18 1.34 2.84 19.00 5.20 1.35 2.74 19.25 5.23 1.36 2.64 19.50 5.25 1.38 2.54 19.75 5.27 1.39 2.44 20.00 5.28 1.40 2.33 Type II 24-hr 10 yr Rainfall=5.55"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 30HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 5S: Area 5 Post Runoff = 47.64 cfs @ 12.03 hrs, Volume= 2.456 af, Depth> 1.39" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10 yr Rainfall=5.55" Area (ac) CN Description * 3.500 55 * 3.300 48 * 13.860 61 * 0.500 98 21.160 59 Weighted Average 20.660 97.64% Pervious Area 0.500 2.36% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 5S: Area 5 Post Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)50 45 40 35 30 25 20 15 10 5 0 Type II 24-hr 10 yr Rainfall=5.55" Runoff Area=21.160 ac Runoff Volume=2.456 af Runoff Depth>1.39" Tc=10.0 min CN=59 47.64 cfs Type II 24-hr 10 yr Rainfall=5.55"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 31HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 5S: Area 5 Post Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.44 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.00 0.00 8.00 0.67 0.00 0.00 8.25 0.70 0.00 0.00 8.50 0.73 0.00 0.00 8.75 0.77 0.00 0.00 9.00 0.82 0.00 0.00 9.25 0.86 0.00 0.00 9.50 0.90 0.00 0.00 9.75 0.95 0.00 0.00 10.00 1.00 0.00 0.00 10.25 1.06 0.00 0.00 10.50 1.13 0.00 0.00 10.75 1.21 0.00 0.00 11.00 1.30 0.00 0.00 11.25 1.42 0.00 0.00 11.50 1.57 0.00 0.31 11.75 2.15 0.07 4.34 12.00 3.68 0.57 45.66 12.25 3.92 0.67 12.44 12.50 4.08 0.75 6.82 12.75 4.19 0.80 4.77 13.00 4.28 0.85 4.05 13.25 4.36 0.89 3.50 13.50 4.43 0.93 3.11 13.75 4.50 0.96 2.77 14.00 4.55 0.99 2.49 14.25 4.60 1.01 2.28 14.50 4.65 1.04 2.19 14.75 4.69 1.06 2.09 15.00 4.74 1.09 2.00 15.25 4.78 1.11 1.90 15.50 4.82 1.13 1.79 15.75 4.85 1.15 1.69 16.00 4.88 1.17 1.58 16.25 4.92 1.19 1.51 16.50 4.95 1.20 1.47 16.75 4.98 1.22 1.44 17.00 5.00 1.24 1.40 17.25 5.03 1.25 1.36 17.50 5.06 1.27 1.33 17.75 5.09 1.28 1.29 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 5.11 1.30 1.25 18.25 5.14 1.31 1.21 18.50 5.16 1.33 1.17 18.75 5.18 1.34 1.13 19.00 5.20 1.35 1.10 19.25 5.23 1.36 1.06 19.50 5.25 1.38 1.01 19.75 5.27 1.39 0.97 20.00 5.28 1.40 0.93 Type II 24-hr 10 yr Rainfall=5.55"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 32HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 6S: Area 6 Post Runoff = 4.00 cfs @ 12.03 hrs, Volume= 0.209 af, Depth> 1.25" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10 yr Rainfall=5.55" Area (ac) CN Description * 0.000 55 * 0.600 48 * 1.400 61 * 0.000 98 2.000 57 Weighted Average 2.000 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 6S: Area 6 Post Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)4 3 2 1 0 Type II 24-hr 10 yr Rainfall=5.55" Runoff Area=2.000 ac Runoff Volume=0.209 af Runoff Depth>1.25" Tc=10.0 min CN=57 4.00 cfs Type II 24-hr 10 yr Rainfall=5.55"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 33HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 6S: Area 6 Post Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.44 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.00 0.00 8.00 0.67 0.00 0.00 8.25 0.70 0.00 0.00 8.50 0.73 0.00 0.00 8.75 0.77 0.00 0.00 9.00 0.82 0.00 0.00 9.25 0.86 0.00 0.00 9.50 0.90 0.00 0.00 9.75 0.95 0.00 0.00 10.00 1.00 0.00 0.00 10.25 1.06 0.00 0.00 10.50 1.13 0.00 0.00 10.75 1.21 0.00 0.00 11.00 1.30 0.00 0.00 11.25 1.42 0.00 0.00 11.50 1.57 0.00 0.00 11.75 2.15 0.05 0.27 12.00 3.68 0.49 3.80 12.25 3.92 0.58 1.07 12.50 4.08 0.65 0.59 12.75 4.19 0.70 0.42 13.00 4.28 0.75 0.36 13.25 4.36 0.78 0.31 13.50 4.43 0.82 0.27 13.75 4.50 0.85 0.24 14.00 4.55 0.87 0.22 14.25 4.60 0.90 0.20 14.50 4.65 0.92 0.19 14.75 4.69 0.95 0.18 15.00 4.74 0.97 0.18 15.25 4.78 0.99 0.17 15.50 4.82 1.01 0.16 15.75 4.85 1.03 0.15 16.00 4.88 1.04 0.14 16.25 4.92 1.06 0.13 16.50 4.95 1.08 0.13 16.75 4.98 1.09 0.13 17.00 5.00 1.11 0.12 17.25 5.03 1.12 0.12 17.50 5.06 1.14 0.12 17.75 5.09 1.15 0.11 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 5.11 1.16 0.11 18.25 5.14 1.18 0.11 18.50 5.16 1.19 0.10 18.75 5.18 1.20 0.10 19.00 5.20 1.22 0.10 19.25 5.23 1.23 0.09 19.50 5.25 1.24 0.09 19.75 5.27 1.25 0.09 20.00 5.28 1.26 0.08 Type II 24-hr 10 yr Rainfall=5.55"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 34HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 7S: Area 7 Post Runoff = 38.56 cfs @ 12.03 hrs, Volume= 2.000 af, Depth> 1.32" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10 yr Rainfall=5.55" Area (ac) CN Description * 0.000 55 * 5.700 48 * 11.750 61 * 0.700 98 18.150 58 Weighted Average 17.450 96.14% Pervious Area 0.700 3.86% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 7S: Area 7 Post Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Type II 24-hr 10 yr Rainfall=5.55" Runoff Area=18.150 ac Runoff Volume=2.000 af Runoff Depth>1.32" Tc=10.0 min CN=58 38.56 cfs Type II 24-hr 10 yr Rainfall=5.55"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 35HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 7S: Area 7 Post Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.44 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.00 0.00 8.00 0.67 0.00 0.00 8.25 0.70 0.00 0.00 8.50 0.73 0.00 0.00 8.75 0.77 0.00 0.00 9.00 0.82 0.00 0.00 9.25 0.86 0.00 0.00 9.50 0.90 0.00 0.00 9.75 0.95 0.00 0.00 10.00 1.00 0.00 0.00 10.25 1.06 0.00 0.00 10.50 1.13 0.00 0.00 10.75 1.21 0.00 0.00 11.00 1.30 0.00 0.00 11.25 1.42 0.00 0.00 11.50 1.57 0.00 0.11 11.75 2.15 0.06 3.08 12.00 3.68 0.53 36.80 12.25 3.92 0.63 10.20 12.50 4.08 0.70 5.62 12.75 4.19 0.75 3.94 13.00 4.28 0.80 3.35 13.25 4.36 0.84 2.89 13.50 4.43 0.87 2.58 13.75 4.50 0.90 2.30 14.00 4.55 0.93 2.06 14.25 4.60 0.96 1.89 14.50 4.65 0.98 1.81 14.75 4.69 1.00 1.74 15.00 4.74 1.03 1.66 15.25 4.78 1.05 1.57 15.50 4.82 1.07 1.49 15.75 4.85 1.09 1.40 16.00 4.88 1.11 1.32 16.25 4.92 1.12 1.25 16.50 4.95 1.14 1.22 16.75 4.98 1.16 1.19 17.00 5.00 1.17 1.16 17.25 5.03 1.19 1.13 17.50 5.06 1.20 1.10 17.75 5.09 1.22 1.07 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 5.11 1.23 1.04 18.25 5.14 1.24 1.01 18.50 5.16 1.26 0.98 18.75 5.18 1.27 0.95 19.00 5.20 1.28 0.91 19.25 5.23 1.29 0.88 19.50 5.25 1.31 0.85 19.75 5.27 1.32 0.81 20.00 5.28 1.33 0.78 Type II 24-hr 10 yr Rainfall=5.55"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 36HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 8S: Area 8 Post Runoff = 0.55 cfs @ 12.03 hrs, Volume= 0.028 af, Depth> 1.54" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10 yr Rainfall=5.55" Area (ac) CN Description * 0.000 55 * 0.000 48 * 0.220 61 * 0.000 98 0.220 61 Weighted Average 0.220 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 8S: Area 8 Post Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Type II 24-hr 10 yr Rainfall=5.55" Runoff Area=0.220 ac Runoff Volume=0.028 af Runoff Depth>1.54" Tc=10.0 min CN=61 0.55 cfs Type II 24-hr 10 yr Rainfall=5.55"Birdwood Post Printed 6/27/2018Prepared by Timmons Group Page 37HydroCAD® 10.00-16 s/n 06538 © 2015 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 8S: Area 8 Post Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.44 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.00 0.00 8.00 0.67 0.00 0.00 8.25 0.70 0.00 0.00 8.50 0.73 0.00 0.00 8.75 0.77 0.00 0.00 9.00 0.82 0.00 0.00 9.25 0.86 0.00 0.00 9.50 0.90 0.00 0.00 9.75 0.95 0.00 0.00 10.00 1.00 0.00 0.00 10.25 1.06 0.00 0.00 10.50 1.13 0.00 0.00 10.75 1.21 0.00 0.00 11.00 1.30 0.00 0.00 11.25 1.42 0.00 0.00 11.50 1.57 0.01 0.01 11.75 2.15 0.10 0.06 12.00 3.68 0.66 0.53 12.25 3.92 0.77 0.14 12.50 4.08 0.85 0.08 12.75 4.19 0.91 0.05 13.00 4.28 0.96 0.05 13.25 4.36 1.00 0.04 13.50 4.43 1.04 0.03 13.75 4.50 1.08 0.03 14.00 4.55 1.11 0.03 14.25 4.60 1.14 0.03 14.50 4.65 1.16 0.02 14.75 4.69 1.19 0.02 15.00 4.74 1.21 0.02 15.25 4.78 1.24 0.02 15.50 4.82 1.26 0.02 15.75 4.85 1.28 0.02 16.00 4.88 1.30 0.02 16.25 4.92 1.32 0.02 16.50 4.95 1.34 0.02 16.75 4.98 1.35 0.02 17.00 5.00 1.37 0.02 17.25 5.03 1.39 0.02 17.50 5.06 1.41 0.01 17.75 5.09 1.42 0.01 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 18.00 5.11 1.44 0.01 18.25 5.14 1.45 0.01 18.50 5.16 1.47 0.01 18.75 5.18 1.48 0.01 19.00 5.20 1.49 0.01 19.25 5.23 1.51 0.01 19.50 5.25 1.52 0.01 19.75 5.27 1.53 0.01 20.00 5.28 1.54 0.01