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HomeMy WebLinkAboutWPO202100063 Plan - VSMP 2021-12-06 (3)3S 4S Pre -Site -good forest Pre -Site 5S Post -Site Subcat Reach Aon Llnk Dunlora Site WPO Prepared by HP Inc. Project Notes Defined 10 rainfall events from Albemarle Rainfall OF Printed 12/6/2021 Dunlora Site WPO Prepared by HP Inc. Rainfall Events Listing (selected events) Event# Event Storm Type Curve Mode Duration B/B Depth AMC Name (hours) (inches) 1 1-yr Type II 24-hr Default 24.00 1 2.97 2 2 2-yr Type II 24-hr Default 24.00 1 3.59 2 3 10-yr Type II 24-hr Default 24.00 1 5.43 2 4 25-yr Type II 24-hr Default 24.00 1 6.67 2 5 50-yr Type II 24-hr Default 24.00 1 7.73 2 6 100-yr Type II 24-hr Default 24.00 1 8.90 2 Printed 12/6/2021 Dunlora Site WPO Prepared by HP Inc. Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 80.770 55 (3S) 80.770 65 (4S) 29.500 69 50-75% Grass cover, Fair, HSG B (5S) 35.770 61 Pasture/grassland/range, Good, HSG B (5S) 15.500 98 Unconnected pavement, HSG B (5S) 242.310 64 TOTAL AREA Printed 12/6/2021 Dunlora Site WPO Prepared by HP Inc. Area Soil Soil Listing (all nodes) Subcatchment (acres) Group Numbers 0.000 HSG A 80.770 HSG B 5S 0.000 HSG C 0.000 HSG D 161.540 Other 3S, 4S 242.310 TOTAL AREA Printed 12/6/2021 Dunlora Site WPO Prepared by HP Inc. Ground Covers (all nodes) Printed 12/6/2021 HSG-A HSG-B HSG-C HSG-D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.000 0.000 0.000 161.540 161.540 3S 4S 0.000 29.500 0.000 0.000 0.000 29.500 50-75% Grass cover, Fair 5S 0.000 35.770 0.000 0.000 0.000 35.770 Pasture/grassland/range, Good 5S 0.000 15.500 0.000 0.000 0.000 15.500 Unconnected pavement 5S 0.000 80.770 0.000 0.000 161.540 242.310 TOTAL AREA Dunlora Site WPO Type 1124-hr 1-yrRaintall=2.97" Prepared by HP Inc. Printed 12/6/2021 HydroCAD® 10.10-6a s/n 08126 © 2020 HydroCAD Software Solutions LLC Page 7 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind method - Pond routing by Stor-Ind method Subcatchment 3S: Pre -Site -good forest Runoff Area=80.770 ac 0.00% Impervious Runoff Depth>0.18" Tc=18.0 min CN=55 Runoff=4.85 cfs 1.244 of Subcatchment 4S: Pre -Site Runoff Area=80.770 ac 0.00% Impervious Runoff Depth>0.49" Tc=18.0 min CN=65 Runoff=34.92 cfs 3.289 of Subcatchment 5S: Post -Site Runoff Area=80.770 ac 19.19% Impervious Runoff Depth>0.61" Tc=12.0 min UI Adjusted CN=68 Runoff=61.07 cfs 4.096 of Total Runoff Area = 242.310 ac Runoff Volume = 8.628 of Average Runoff Depth = 0.43" 93.60% Pervious = 226.810 ac 6.40% Impervious = 15.500 ac Duniora Site WPO Prepared by HP Inc. Type 1124-hr 1-yrRainfall=2.97" Printed 12/6/2021 Summary for Subcatchment 3S: Pre -Site -good forest Runoff = 4.85 cfs @ 12.22 hrs, Volume= 1.244 af, Depth> 0.18" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1-yr Rainfall=2.97" Area (ac) CN Description 80.770 55 80.770 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 18.0 Direct Entry, Subcatchment 3S: Pre -Site -good forest Hydrograph ■ Rurwff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (howl) Duniora Site WPO Prepared by HP Inc. Type 1124-hr 1-yrRainfall=2.97" Printed 12/6/2021 Summary for Subcatchment 4S: Pre -Site Runoff = 34.92 cfs @ 12.14 hrs, Volume= 3.289 af, Depth> 0.49" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1-yr Rainfall=2.97" Area (ac) CN Description 80.770 65 80.770 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 18.0 Direct Entry, Subcatchment 4S: Pre -Site Hydrograph ■ Rurwff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Duniora Site WPO Prepared by HP Inc. Type 1124-hr 1-yrRainfall=2.97" Printed 12/6/2021 Summary for Subcatchment 5S: Post -Site Runoff = 61.07 cfs @ 12.06 hrs, Volume= 4.096 af, Depth> 0.61" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1-yr Rainfall=2.97" Area (ac) CN 35.770 61 Pasture/grassland/range, Good, HSG B 29.500 69 50-75% Grass cover, Fair, HSG B 15.500 98 Unconnected pavement, HSG B 80.770 71 68 Weighted Average, UI Adjusted 65.270 80.81 % Pervious Area 15.500 19.19% Impervious Area 15.500 100.00% Unconnected Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.0 Direct Entry, Subcatchment 5S: Post -Site Hydrograph ■ Rurwff Time (hours) Dunlora Site WPO Type 1124-hr 2-yr Raintall=3.59 " Prepared by HP Inc. Printed 12/6/2021 HydroCAD® 10.10-6a s/n 08126 © 2020 HydroCAD Software Solutions LLC Page 11 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind method - Pond routing by Stor-Ind method Subcatchment 3S: Pre -Site -good forest Runoff Area=80.770 ac 0.00% Impervious Runoff Depth>0.37" Tc=18.0 min CN=55 Runoff=18.98 cfs 2.511 of Subcatchment 4S: Pre -Site Runoff Area=80.770 ac 0.00% Impervious Runoff Depth>0.79" Tc=18.0 min CN=65 Runoff=64.91 cfs 5.346 of Subcatchment 5S: Post -Site Runoff Area=80.770 ac 19.19% Impervious Runoff Depth>0.95" Tc=12.0 min UI Adjusted CN=68 Runoff=102.52 cfs 6.396 of Total Runoff Area = 242.310 ac Runoff Volume = 14.253 of Average Runoff Depth = 0.71" 93.60% Pervious = 226.810 ac 6.40% Impervious = 15.500 ac Duniora Site WPO Prepared by HP Inc. Type 1124-hr 2-yrRainfall=3.59" Printed 12/6/2021 Summary for Subcatchment 3S: Pre -Site -good forest Runoff = 18.98 cfs @ 12.17 hrs, Volume= 2.511 af, Depth> 0.37" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2-yr Rainfall=3.59" Area (ac) CN Description 80.770 55 80.770 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 18.0 Direct Entry, Subcatchment 3S: Pre -Site -good forest Hydrograph ■ Runoff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Duniora Site WPO Prepared by HP Inc. Type 1124-hr 2-yr Rainfall=3.59 " Printed 12/6/2021 Summary for Subcatchment 4S: Pre -Site Runoff = 64.91 cfs @ 12.13 hrs, Volume= 5.346 af, Depth> 0.79" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2-yr Rainfall=3.59" Area (ac) CN Description 80.770 65 80.770 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 18.0 Direct Entry, 9 Subcatchment 4S: Pre -Site Hydrograph ....... ....■■.... o . 1 . 2. 3 .4 . 5 . 5 . 7 . a. 9 11 0 . 11. 12 13 .14 1i5 1i6 1i7. ,$ 19 .20 21 22 23 24 Time (hours) ■ Rurwff Duniora Site WPO Prepared by HP Inc. Type 1124-hr 2-yrRainfall=3.59" Printed 12/6/2021 Summary for Subcatchment 5S: Post -Site Runoff = 102.52 cfs @ 12.05 hrs, Volume= 6.396 af, Depth> 0.95" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2-yr Rainfall=3.59" Area (ac) CN 35.770 61 Pasture/grassland/range, Good, HSG B 29.500 69 50-75% Grass cover, Fair, HSG B 15.500 98 Unconnected pavement, HSG B 80.770 71 68 Weighted Average, UI Adjusted 65.270 80.81 % Pervious Area 15.500 19.19% Impervious Area 15.500 100.00% Unconnected Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.0 Direct Entry, Subcatchment 5S: Post -Site Hydrograph ■ Rurwff Time (hours) Dunlora Site WPO Type II 24-hr 10-yr Rainfall=5.43" Prepared by HP Inc. Printed 12/6/2021 HydroCAD® 10.10-6a s/n 08126 © 2020 HydroCAD Software Solutions LLC Page 15 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind method - Pond routing by Stor-Ind method Subcatchment 3S: Pre -Site -good forest Runoff Area=80.770 ac 0.00% Impervious Runoff Depth>1.19" Tc=18.0 min CN=55 Runoff=97.31 cfs 8.034 of Subcatchment 4S: Pre -Site Runoff Area=80.770 ac 0.00% Impervious Runoff Depth>1.94" Tc=18.0 min CN=65 Runoff=178.70 cfs 13.027 of Subcatchment 5S: Post -Site Runoff Area=80.770 ac 19.19% Impervious Runoff Depth>2.18" Tc=12.0 min UI Adjusted CN=68 Runoff=249.60 cfs 14.702 of Total Runoff Area = 242.310 ac Runoff Volume = 35.763 of Average Runoff Depth = 1.77" 93.60% Pervious = 226.810 ac 6.40% Impervious = 15.500 ac Duniora Site WPO Prepared by HP Inc. Type/1 24-hr 10-yr Rainfall=5.43" Printed 12/6/2021 Summary for Subcatchment 3S: Pre -Site -good forest Runoff = 97.31 cfs @ 12.13 hrs, Volume= 8.034 af, Depth> 1.19" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10-yr Rainfall=5.43" Area (ac) CN Description 80.770 55 80.770 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 18.0 Direct Entry, Subcatchment 3S: Pre -Site -good forest Hydrograph ■ Runoff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Duniora Site WPO Prepared by HP Inc. Type/1 24-hr 10-yr Rainfall=5.43" Printed 12/6/2021 Summary for Subcatchment 4S: Pre -Site Runoff = 178.70 cfs @ 12.11 hrs, Volume= 13.027 af, Depth> 1.94" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10-yr Rainfall=5.43" Area (ac) CN Description 80.770 65 80.770 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 18.0 Direct Entry, Subcatchment 4S: Pre -Site Hydrograph ■ Rurwff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Duniora Site WPO Prepared by HP Inc. Type II 24-hr 10-yr Rainfall=5.43" Printed 12/6/2021 Summary for Subcatchment 5S: Post -Site Runoff = 249.60 cfs @ 12.04 hrs, Volume= 14.702 af, Depth> 2.18" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10-yr Rainfall=5.43" Area (ac) CN Ad l Description 35.770 61 Pasture/grassland/range, Good, HSG B 29.500 69 50-75% Grass cover, Fair, HSG B 15.500 98 Unconnected pavement, HSG B 80.770 71 68 Weighted Average, UI Adjusted 65.270 80.8l % Pervious Area 15.500 19.19% Impervious Area 15.500 100.00% Unconnected Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.0 Direct Entry, 260 240 220 200 180 w 160 140 0 LL 120 100 80 60 40 20 Subcatchment 5S: Post -Site Hydrograph E ■■ ■■■■■■■■■■ EE E ' • _ I Runor: • kr• ■■■■ � , ■■■■■■■■■■■ ■■■■■■■■■■ 1 1■■■■■■■■■■■■ ■■■■■■■■■■■■ Runoff Depth>2.18" Tc=12.0 min EEEMMENMEN 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (homm) ■ Rurwff Dunlora Site WPO Type II 24-hr 25-yrRaintall=6.67" Prepared by HP Inc. Printed 12/6/2021 HydroCAD® 10.10-6a s/n 08126 © 2020 HydroCAD Software Solutions LLC Page 19 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind method - Pond routing by Stor-Ind method Subcatchment 3S: Pre -Site -good forest Runoff Area=80.770 ac 0.00% Impervious Runoff Depth>1.91" Tc=18.0 min CN=55 Runoff=168.79 cfs 12.827 of Subcatchment 4S: Pre -Site Runoff Area=80.770 ac 0.00% Impervious Runoff Depth>2.84" Tc=18.0 min CN=65 Runoff=267.16 cfs 19.085 of Subcatchment 5S: Post -Site Runoff Area=80.770 ac 19.19% Impervious Runoff Depth>3.14" Tc=12.0 min UI Adjusted CN=68 Runoff=360.65 cfs 21.107 of Total Runoff Area = 242.310 ac Runoff Volume = 53.019 of Average Runoff Depth = 2.63" 93.60% Pervious = 226.810 ac 6.40% Impervious = 15.500 ac Duniora Site WPO Prepared by HP Inc. Type II 24-hr 25-yr Rainfall=6.67" Printed 12/6/2021 Summary for Subcatchment 3S: Pre -Site -good forest Runoff = 168.79 cfs @ 12.12 hrs, Volume= 12.827 af, Depth> 1.91" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 25-yr Rainfall=6.67" Area (ac) CN Description 80.770 55 80.770 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 18.0 Direct Entry, 180 170 160 150 140 130 120 N 110 100 c 90 LL 80 70 fi0 50 40 30 20 10 0 Subcatchment 3S: Pre -Site -good forest Hydrograph E • U.... M • • �11.11.11.11 MMMMMMMMMM MMMMMMMMM MMMMMMMMMMM .......... M-M-AM • .......... .......... 11.11..1■1■11.11.11,11 M 1 ---..---.-- MMMMMMMMMMMM mi 1,11.11.11.11.11.11.11.11.11,11 M .--.-.--.1 .MMM111111.11.111 MI 1,11.11.111111.11.111,11.11.11,11 1111.11.11.11.11.11.11.11.11.11 M M €• ..----.---1 .11.11.11.11.11.11.11.11.11.11 M €• • -.----.---1 , ,11.11.11.11.11.11.11.11.11.11 M 1 MMMMMMMMMM1 l I�MM MMM 1 MMMMMMMMMM1 1 ��j� r.M 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ■ Runoff Duniora Site WPO Prepared by HP Inc. Type 11 24-hr 25-yr Rainfall=6.67" Printed 12/6/2021 Summary for Subcatchment 4S: Pre -Site Runoff = 267.16 cfs @ 12.11 hrs, Volume= 19.085 af, Depth> 2.84" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 25-yr Rainfall=6.67" Area (ac) CN Description 80.770 65 80.770 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 18.0 Direct Entry, Subcatchment 4S: Pre -Site Hydrograph IMOMMEME • ■ • MENMEMMEMEMEMEN • IM■■1 99PP-■1 .■■■■■■■■■■■ ■■■■■■■■■■■■ WIMiiA"1111111 .■■■■■■M■■■ • ® ' • ■1 .■■■■■.■■■■■ '''///////////////EZ;Z/Z��/////// ■■■■■■■■■� �M_EN -- ■M■■■■■1. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Tim (hours) ■ Rurwff Duniora Site WPO Prepared by HP Inc. Type 11 24-hr 25-yr Rainfall=6.67" Printed 12/6/2021 Summary for Subcatchment 5S: Post -Site Runoff = 360.65 cfs @ 12.04 hrs, Volume= 21.107 af, Depth> 3.14" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 25-yr Rainfall=6.67" Area (ac) CN 35.770 61 Pasture/grassland/range, Good, HSG B 29.500 69 50-75% Grass cover, Fair, HSG B 15.500 98 Unconnected pavement, HSG B 80.770 71 68 Weighted Average, UI Adjusted 65.270 80.81 % Pervious Area 15.500 19.19% Impervious Area 15.500 100.00% Unconnected Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.0 Direct Entry, Subcatchment 5S: Post -Site Hydrograph ■ Rurwff Time (hours) Dunlora Site WPO Type II 24-hr 50-yr Rainfall= 7.73 " Prepared by HP Inc. Printed 12/6/2021 HydroCAD® 10.10-6a s/n 08126 © 2020 HydroCAD Software Solutions LLC Page 23 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind method - Pond routing by Stor-Ind method Subcatchment 3S: Pre -Site -good forest Runoff Area=80.770 ac 0.00% Impervious Runoff Depth>2.59" Tc=18.0 min CN=55 Runoff=236.47 cfs 17.410 of Subcatchment 4S: Pre -Site Runoff Area=80.770 ac 0.00% Impervious Runoff Depth>3.66" Tc=18.0 min CN=65 Runoff=347.33 cfs 24.633 of Subcatchment 5S: Post -Site Runoff Area=80.770 ac 19.19% Impervious Runoff Depth>4.00" Tc=12.0 min UI Adjusted CN=68 Runoff=459.82 cfs 26.911 of Total Runoff Area = 242.310 ac Runoff Volume = 68.953 of Average Runoff Depth = 3.41" 93.60% Pervious = 226.810 ac 6.40% Impervious = 15.500 ac Duniora Site WPO Prepared by HP Inc. Type II 24-hr 50-yr Rainfall= 7.73 " Printed 12/6/2021 Summary for Subcatchment 3S: Pre -Site -good forest Runoff = 236.47 cfs @ 12.12 hrs, Volume= 17.410 af, Depth> 2.59" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 50-yr Rainfall=7.73" Area (ac) CN Description 80.770 55 80.770 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 18.0 Direct Entry, 21 Subcatchment 3S: Pre -Site -good forest Hydrograph • 11 ��i♦������� i • MIIII MMMMMMMMMM MMMMMMMMMMMM iii1MMMMMMMMMMM ___________ MMMMMMMMMMMM MMMMMMMMMMMM MMMMMMMM MMMMMMM MMMMMMM MMM 1 MMMMMMMMMMMM ______1 MMMMMMMMMMMM __________ 1 I /i MMMM 0 .1 . 2 3 .4. 5. s ..7 . 8 . 9. . Zia 111 1iz. 13 .14 .1i5 .1iS 1i7. '8. 19 20 .21 22 23. 24 Time (hours) ■ Runoff Duniora Site WPO Prepared by HP Inc. Type 11 24-hr 50-yr Rainfall= 7.73 " Printed 12/6/2021 Summary for Subcatchment 4S: Pre -Site Runoff = 347.33 cfs @ 12.11 hrs, Volume= 24.633 af, Depth> 3.66" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 50-yr Rainfall=7.73" Area (ac) CN Description ' 80.770 65 80.770 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 18.0 Direct Entry, 240 w 220: 200 0 1s0 Subcatchment 4S: Pre -Site Hydrograph .......... 0 . 2 3 .4. 5. 6 .7. 8 .9 .11 0' 11 12 13 14.1i5 16 17 . 18. 19.20.21 22 23..2 24 Time (hours) ■ Rurwff Duniora Site WPO Prepared by HP Inc. Type 11 24-hr 50-yr Rainfall= 7.73 " Printed 12/6/2021 Summary for Subcatchment 5S: Post -Site Runoff = 459.82 cfs @ 12.04 hrs, Volume= 26.911 af, Depth> 4.00" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 50-yr Rainfall=7.73" Area (ac) CN 35.770 61 Pasture/grassland/range, Good, HSG B 29.500 69 50-75% Grass cover, Fair, HSG B 15.500 98 Unconnected pavement, HSG B 80.770 71 68 Weighted Average, UI Adjusted 65.270 80.81 % Pervious Area 15.500 19.19% Impervious Area 15.500 100.00% Unconnected Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.0 Direct Entry, Subcatchment 5S: Post -Site Hydrograph ■ Runoff Time (hours) Dunlora Site WPO Type 1124-hr 100-yrRaintall=8.90" Prepared by HP Inc. Printed 12/6/2021 HydroCAD® 10.10-6a s/n 08126 © 2020 HydroCAD Software Solutions LLC Page 27 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind method - Pond routing by Stor-Ind method Subcatchment 3S: Pre -Site -good forest Runoff Area=80.770 ac 0.00% Impervious Runoff Depth>3.40" Tc=18.0 min CN=55 Runoff=316.63 cfs 22.871 of Subcatchment 4S: Pre -Site Runoff Area=80.770 ac 0.00% Impervious Runoff Depth>4.61" Tc=18.0 min CN=65 Runoff=439.10 cfs 31.049 of Subcatchment 5S: Post -Site Runoff Area=80.770 ac 19.19% Impervious Runoff Depth>4.99" Tc=12.0 min UI Adjusted CN=68 Runoff=572.15 cfs 33.573 of Total Runoff Area = 242.310 ac Runoff Volume = 87.493 of Average Runoff Depth = 4.33" 93.60% Pervious = 226.810 ac 6.40% Impervious = 15.500 ac Duniora Site WPO Prepared by HP Inc. Type 1124-hr 100-yr Rainfall=8.90" Printed 12/6/2021 Summary for Subcatchment 3S: Pre -Site -good forest Runoff = 316.63 cfs @ 12.11 hrs, Volume= 22.871 af, Depth> 3.40" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100-yr Rainfall=8.90" Area (ac) CN Description ' 80.770 55 80.770 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 18.0 Direct Entry, 340 320- 300 280 260 Subcatchment 3S: Pre -Site -good forest Hydrograph , i Runoff Area=80.770 acI' Runoff Volume=22.871 fir go 1 ■■■■■■■■■■■■ •MENNEN ■■■■■■■■■■ ■■■■■■■■■■ ■■■■■■■■■■ �LLBJQLJ■■■■■1 M■■■■■■■■■■■ �MMM■■■■■■■1 .■■■■■■■■■■■ ills■■■■■■ % ■■■■■■■■■■ ■■EMO� E� EMEMEMEEMEMEMMM 0 2 3 .4. 5. '6 .7. 5 9 .'0 11 11 2 . 13 14 .1i5 .1iS 11 7. 18 10 .20 .z1 22 23. 24 Time (hours) ■ Runoff Duniora Site WPO Prepared by HP Inc. Type 1124-hr 100-yr Rainfall=8.90" Printed 12/6/2021 Summary for Subcatchment 4S: Pre -Site Runoff = 439.10 cfs @ 12.11 hrs, Volume= 31.049 af, Depth> 4.61" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100-yr Rainfall=8.90" Area (ac) CN Description 80.770 65 80.770 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 18.0 Direct Entry, Subcatchment 4S: Pre -Site Hydrograph ■ Rurwff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Duniora Site WPO Prepared by HP Inc. Type 1124-hr 100-yr Rainfall=8.90" Printed 12/6/2021 Summary for Subcatchment 5S: Post -Site Runoff = 572.15 cfs @ 12.04 hrs, Volume= 33.573 af, Depth> 4.99" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100-yr Rainfall=8.90" Area (ac) CN 35.770 61 Pasture/grassland/range, Good, HSG B 29.500 69 50-75% Grass cover, Fair, HSG B 15.500 98 Unconnected pavement, HSG B 80.770 71 68 Weighted Average, UI Adjusted 65.270 80.81 % Pervious Area 15.500 19.19% Impervious Area 15.500 100.00% Unconnected Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.0 Direct Entry, Subcatchment 5S: Post -Site Hydrograph ■ Rurwff Time (hours)