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HomeMy WebLinkAboutWPO201300027 Calculations 2013-04-16 • Post Developed Conversion /2N) Bio-retention Pond ST#1 Conversion 4ubca) Reach -on. Routing Diagram for OLD TRAIL BLOCK 35 BIOFILTER Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net, Printed 5/15/201 HydroCAD®10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILTER Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 2 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support,training materials, and additional features which are essential for actual design work. Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 10.800 74 >75% Grass cover, Good, HSG C (1S) 8.890 85 1/4 acre lots, 41% imp, HSG C (1S) 19.690 79 TOTAL AREA Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILTER Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 3 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support,training materials, and additional features which are essential for actual design work. Ground Covers (all nodes) HSG-A HSG-B HSG-C HSG-D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.000 8.890 0.000 0.000 8.890 1/4 acre lots, 41% imp 1S 0.000 0.000 10.800 0.000 • 0.000 10.800 >75% Grass cover, Good 1S 0.000 0.000 19.690 0.000 0.000 19.690 TOTAL AREA Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILTER Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 4 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Pipe Listing (all nodes) Line# Node In-Invert Out-Invert Length Slope n Diam/Width Height Inside-Fill Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) 1 2P 670.50 670.00 64.0 0.0078 0.013 24.0 0.0 0.0 Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILTE VA Albemarle County 24-hr S1 2-Year 2-Year Rainfall=3.01" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 5 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support,training materials, and additional features which are essential for actual design work. Time span=1.00-20.00 hrs, dt=0.05 hrs, 381 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchmentl S: Post Developed Runoff Area=19.690 ac 18.51% Impervious Runoff Depth>1.09" Tc=30.0 min CN=79 Runoff=18.13 cfs 1.786 of Pond 2P: Bio-retention Pond ST#1 ConversionPeak Elev=678.01' Storage=27 cf Inflow=18.13 cfs 1.786 af Discarded=0.00 cfs 0.000 af Primary=18.13 cfs 1.786 af Secondary=0.00 cfs 0.000 af Outflow=18.13 cfs 1.786 af Total Runoff Area = 19.690 ac Runoff Volume = 1.786 af Average Runoff Depth = 1.09" 81.49% Pervious = 16.045 ac 18.51% Impervious = 3.645 ac Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILTE VA-Albemarle County 24-hr S1 2-Year 2-Year Rainfall=3.01" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 6 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Summary for Subcatchment 'IS: Post Developed Conversion Runoff = 18.13 cfs @ 12.40 hrs, Volume= 1.786 af, Depth> 1.09" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs VA-Albemarle County 24-hr S1 2-Year 2-Year Rainfall=3.01" Area (ac) CN Description 10.800 74 >75% Grass cover, Good, HSG C * 8.890 85 1/4 acre lots, 41% imp, HSG C 19.690 79 Weighted Average 16.045 81.49% Pervious Area 3.645 18.51% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 20.0 Direct Entry, Golf Course Run-off 10.0 Direct Entry, Post Developed Blocks 35A &29A 30.0 0 Total • Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILTE VA Albemarle County 24-hr S1 2-Year 2-Year Rainfall=3.01" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 7 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Subcatchment 1S: Post Developed Conversion Hydrograph 20 --- --- - � ®Runoff` 19. 11813cfs 18- VA-Albemarle County 24-hr S12-Year *`' ;- 17- 2-Year Rainfall=3A1"r Runoff Area=19.690 ac r r , 15 Runoff Vol a Runoff Depths1A9" 1z� Tc=30.0 min 11-' CN=79 10= ° 9— 8` 6J 44 2 1 .trEV.d. I<.dJ dl ii el1°.Y-`r ✓.a 8""✓ 'd" '..�1a t,a.. .1 ur.e.....n. n 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILTE VA-Albemarle County 24-hr S1 2-Year 2-Year Rainfall=3.01" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler sin S17638 ©2011 HydroCAD Software Solutions LLC Page 8 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Summary for Pond 2P: Bio-retention Pond ST#1 Conversion Inflow Area = 19.690 ac, 18.51% Impervious, Inflow Depth > 1.09" for 2-Year event Inflow = 18.13 cfs @ 12.40 hrs, Volume= 1.786 af Outflow = 18.13 cfs @ 12.40 hrs, Volume= 1.786 af, Atten= 0%, Lag= 0.0 min Discarded = 0.00 cfs @ 1.00 hrs, Volume= 0.000 af Primary = 18.13 cfs @ 12.40 hrs, Volume= 1.786 of Secondary= 0.00 cfs @ 1.00 hrs, Volume= 0.000 af Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs/ 3 Peak Elev= 678.01'@ 12.40 hrs Surf.Area= 2,177 sf Storage= 27 cf Plug-Flow detention time=0.0 min calculated for 1.782 of(100% of inflow) Center-of-Mass det. time=0.0 min ( 816.4 - 816.3 ) Volume Invert Avail.Storage Storage Description #1 678.00' 6,924 cf Custom Stage Data (Prismatic)isted below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 678.00 2,170 0 0 679.00 2,713 2,442 2,442 680.00 3,033 2,873 5,315 680.50 3,406 1,610 6,924 Device Routing Invert Outlet Devices #1 Discarded 678.00' 4.000 in/hr Exfiltration over Surface area Conductivity to Groundwater Elevation = 0.00' #2 Primary 670.50' 24.0" Round Culvert L= 64.0' RCP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert=670.50'/670.00' S= 0.0078'/' Cc= 0.900 n= 0.013, Flow Area= 3.14 sf #3 Device 1 678.50' 36.0" x 41.0" Horiz. Orifice/Grate C= 0.600 in 36.0"x 41.0" Grate Limited to weir flow at low heads #4 Secondary 679.50' 18.0' long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILTE VA Albemarle County 24-hr S1 2-Year 2-Year Rainfall=3.01" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 9 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Discarded OutFlow Max=0.00 cfs @ 1.00 hrs HW=678.00' (Free Discharge) t-1=Exfiltration (Passes 0.00 cfs of 0.20 cfs potential flow) t-3=Orifice/Grate ( Controls 0.00 cfs) Primary OutFlow Max=36.78 cfs @ 12.40 hrs HW=678.01 TW=672.10' (Fixed TW Elev= 672.10') t-2=Culvert (Inlet Controls 36.78 cfs @ 11.71 fps) Secondary OutFlow Max=0.00 cfs @ 1.00 hrs HW=678.00' (Free Discharge) t-4=Broad-Crested Rectangular Weir( Controls 0.00 cfs) Pond 2P: Bio-retention Pond ST#1 Conversion Hydrograph , r ■Inflow 18.13 cfs 0 Outflow Fnflow Are99 .f90��ac 1a,3crs ■Discarded ■Primary 20 ' Pear f rev=078.01' 1813 cfs 1 ■Secondary. 18,..- -Stor Qe=27 cf 17-' �d ,+, - - 16 " 15- 1 I ' Vi 14� 13 ils , + " s- o00 /!,/ems:r/e.M7Z,5/..F,✓..;/r/r.�i,�,./�/,/.072:e:ei OOo cfs w�sr!rsr..r "!,A�xi .' a�' 1:'> .' F a 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILTE VA-Albemarle County 24-hr S1 2-Year 2-Year Rainfall=3.01" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 10 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Pond 2P: Bio-retention Pond ST#1 Conversion Stage-Discharge "Xn /���� 0 Total 111 Discarded X"' ®Primary ��� //� •Secondary / 680-, - Broad-Crested Rectangular Weir • w 679 ) G ale 678 f-- 0 10 20 30 40 50 60 70 80 90 Discharge (cfs) • Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILTE VA-Albemarle County 24-hr S1 2-Year 2-Year Rainfall=3.01" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler sin S17638 ©2011 HydroCAD Software Solutions LLC Page 11 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Stage-Area-Storage for Pond 2P: Bio-retention Pond ST#1 Conversion Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 678.00 2,170 0 680.20 3,182 5,936 678.05 2,197 109 680.25 3,220 6,096 678.10 2,224 220 680.30 3,257 6,258 678.15 2,251 332 680.35 3,294 6,422 678.20 2,279 445 680.40 3,331 6,587 678.25 2,306 559 680.45 3,369 6,755 678.30 2,333 675 680.50 3,406 6,924 678.35 2,360 793 678.40 2,387 911 678.45 2,414 1,031 678.50 2,442 1,153 678.55 2,469 1,276 678.60 2,496 1,400 678.65 2,523 1,525 678.70 2,550 1,652 678.75 2,577 1,780 678.80 2,604 1,910 678.85 2,632 2,041 678.90 2,659 2,173 678.95 2,686 2,307 679.00 2,713 2,442 679.05 2,729 2,578 679.10 2,745 2,714 679.15 2,761 2,852 679.20 2,777 2,991 679.25 2,793 3,130 679.30 2,809 3,270 679.35 2,825 3,411 679.40 2,841 3,552 679.45 2,857 3,695 679.50 2,873 3,838 679.55 2,889 3,982 679.60 2,905 4,127 679.65 2,921 4,273 679.70 2,937 4,419 679.75 2,953 4,566 679.80 2,969 4,714 679.85 2,985 4,863 679.90 3,001 5,013 679.95 3,017 5,163 680.00 3,033 5,315 680.05 3,070 5,467 680.10 3,108 5,622 680.15 3,145 5,778 Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILTVA-Albemarle County 24-hr S1 10-Year 10-Year Rainfall=5.55" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 12 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support,training materials, and additional features which are essential for actual design work. Time span=1.00-20.00 hrs, dt=0.05 hrs, 381 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchmentl S: Post Developed Runoff Area=19.690 ac 18.51% Impervious Runoff Depth>2.96" Tc=30.0 min CN=79 Runoff=39.05 cfs 4.863 af Pond 2P: Bio-retention Pond ST#1 Peak Elev=678.30' Storage=677 cf Inflow=39.05 cfs 4.863 af Discarded=0.00 cfs 0.000 af Primary=37.67 cfs 4.856 af Secondary=0.00 cfs 0.000 af Outflow=37.67 cfs 4.856 af Total Runoff Area = 19.690 ac Runoff Volume =4.863 af Average Runoff Depth = 2.96" 81.49% Pervious = 16.045 ac 18.51% Impervious = 3.645 ac • Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILTVA-Albemarle County 24-hr S1 10-Year 10-Year Rainfall=5.55" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 13 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Summary for Subcatchment 1S: Post Developed Conversion Runoff = 39.05 cfs @ 12.37 hrs, Volume= 4.863 af, Depth> 2.96" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs VA-Albemarle County 24-hr S1 10-Year 10-Year Rainfall=5.55" Area (ac) CN Description 10.800 74 >75% Grass cover, Good, HSG C * 8.890 85 1/4 acre lots, 41% imp, HSG C 19.690 79 Weighted Average 16.045 81.49% Pervious Area 3.645 18.51% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 20.0 Direct Entry, Golf Course Run-off 10.0 Direct Entry, Post Developed Blocks 35A & 29A 30.0 0 Total Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILTVA-Albemarle County 24-hr Si 10-Year 10-Year Rainfall=5.55" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 14 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Subcatchment 1S: Post Developed Conversion Hydrograph ®Runoff 42 I 3sos I r VA-Albemarle Co ant 24-hr-ST 10-Ye ar c�,336 8; 10-Year'Rainfal1=5.55" Runoff Area 32 - Runoff Volume s1:863af - _- 30 Runoff`Depths2.96" 28?" Tc=30.O min ,r 26= _ u I 0 20 18 16� 1 14-' $ 12=., 10= f=., 8 ,aj h 6y ''.cx 4� d a '�ris"s- 'a rs�•.'v� 3'`- �,-s+�ay�" '�" f. )���" ..4'.�r�°,o,d""'F 1 2 3 4 5 6 7 6 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILTVA-Albemarle County 24-hr S1 10-Year 10-Year Rainfall=5.55" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 15 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Summary for Pond 2P: Bio-retention Pond ST#1 Conversion Inflow Area = 19.690 ac, 18.51% Impervious, Inflow Depth > 2.96" for 10-Year event Inflow = 39.05 cfs @ 12.37 hrs, Volume= 4.863 af Outflow = 37.67 cfs @ 12.44 hrs, Volume= 4.856 af, Atten= 4%, Lag= 4.3 min Discarded = 0.00 cfs @ 1.00 hrs, Volume= 0.000 af Primary = 37.67 cfs @ 12.44 hrs, Volume= 4.856 af Secondary= 0.00 cfs @ 1.00 hrs, Volume= 0.000 af Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs/3 Peak Elev= 678.30'@ 12.44 hrs Surf.Area= 2,333 sf Storage= 677 cf Plug-Flow detention time=0.7 min calculated for 4.856 of(100% of inflow) Center-of-Mass det. time=0.1 min ( 805.4 - 805.2 ) Volume Invert Avail.Storage Storage Description #1 678.00' 6,924 cf Custom Stage Data (Prismatic)isted below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 678.00 2,170 0 0 679.00 2,713 2,442 2,442 680.00 3,033 2,873 5,315 680.50 3,406 1,610 6,924 Device Routing Invert Outlet Devices #1 Discarded 678.00' 4.000 in/hr Exfiltration over Surface area Conductivity to Groundwater Elevation = 0.00' #2 Primary 670.50' 24.0" Round Culvert L= 64.0' RCP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 670.50'/670.00' S= 0.0078'/' Cc= 0.900 n= 0.013, Flow Area=3.14 sf #3 Device 1 678.50' 36.0" x 41.0" Horiz. Orifice/Grate C= 0.600 in 36.0" x 41.0" Grate Limited to weir flow at low heads #4 Secondary 679.50' 18.0' long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 • Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILTVA-Albemarle County 24-hr S1 10-Year 10-Year Rainfall=5.55" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 16 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support,training materials, and additional features which are essential for actual design work. Discarded OutFlow Max=0.00 cfs @ 1.00 hrs HW=678.00' (Free Discharge) t-1=Exfiltration (Passes 0.00 cfs of 0.20 cfs potential flow) t-3=Orifice/Grate ( Controls 0.00 cfs) Primary OutFlow Max=37.64 cfs @ 12.44 hrs HW=678.29' TW=672.10' (Fixed TW Elev= 672.10') t-2=Culvert (Inlet Controls 37.64 cfs @ 11.98 fps) Secondary OutFlow Max=0.00 cfs @ 1.00 hrs HW=678.00' (Free Discharge) t-4=Broad-Crested Rectangular Weir( Controls 0.00 cfs) Pond 2P: Bio-retention Pond ST#1 Conversion Hydrograph ± ■Inflow + 39.05 cfs Outflow Inflo +w Area=19.690!ae •Discarded 37 s7 cfs Prima = Peak EI ev=078:3 ' Primary -•Secondary 42 40.• - + 384' - Storage=677-cf _ 36 32 s' 26� , r 24� 0 20� LL riot 18� - - t 12 ✓ 18 /////01/J///%////////.%�r'/i'i.�'✓/7/./• 1/////%/! f �/ v 0.00 cfs 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILTVA-Albemarle County 24-hr S1 10-Year 10-Year Rainfall=5.55" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 17 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Pond 2P: Bio-retention Pond ST#1 Conversion Stage-Discharge �`�� s//�A` 0 Total ■Discarded 900``$4 Primary �/77"907i$444‘ ' 0 Secondary 680 Broad-crested Rectangular Weir = w 679 ittrapo. 678 . , . 0 10 20 30 40 50 60 70 80 90 Discharge (cfs) Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILTVA-Albemarle County 24-hr S1 10-Year 10-Year Rainfall=5.55" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 18 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Stage-Area-Storage for Pond 2P: Bio-retention Pond ST#1 Conversion Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 678.00 2,170 0 680.20 3,182 5,936 678.05 2,197 109 680.25 3,220 6,096 678.10 2,224 220 680.30 3,257 6,258 678.15 2,251 332 680.35 3,294 6,422 678.20 2,279 445 680.40 3,331 6,587 678.25 2,306 559 680.45 3,369 6,755 678.30 2,333 675 680.50 3,406 6,924 678.35 2,360 793 678.40 2,387 911 678.45 2,414 1,031 678.50 2,442 1,153 678.55 2,469 1,276 678.60 2,496 1,400 678.65 2,523 1,525 678.70 2,550 1,652 678.75 2,577 1,780 678.80 2,604 1,910 678.85 2,632 2,041 678.90 2,659 2,173 678.95 2,686 2,307 679.00 2,713 2,442 679.05 2,729 2,578 679.10 2,745 2,714 679.15 2,761 2,852 679.20 2,777 2,991 679.25 2,793 3,130 679.30 2,809 3,270 679.35 2,825 3,411 679.40 2,841 3,552 679.45 2,857 3,695 679.50 2,873 3,838 679.55 2,889 3,982 679.60 2,905 4,127 679.65 2,921 4,273 679.70 2,937 4,419 679.75 2,953 4,566 679.80 2,969 4,714 679.85 2,985 4,863 679.90 3,001 5,013 679.95 3,017 5,163 680.00 3,033 5,315 680.05 3,070 5,467 680.10 3,108 5,622 680.15 3,145 5,778 • Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILVA-Albemarle County 24-hr Si 50-Year 50-Year Rainfall=10.11" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 19 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Time span=1.00-20.00 hrs, dt=0.05 hrs, 381 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchmentl S: Post Developed Runoff Area=19.690 ac 18.51% Impervious Runoff Depth>6.67" Tc=30.0 min CN=79 Runoff=61.78 cfs 10.952 af Pond 2P: Bio-retention Pond ST#1 Peak EIev=680.04' Storage=5,422 cf Inflow=61.78 cfs 10.952 af Discarded=0.28 cfs 0.016 af Primary=42.61 cfs 10.490 af Secondary=18.72 cfs 0.447 af Outflow=61.61 cfs 10.952 af Total Runoff Area = 19.690 ac Runoff Volume = 10.952 af Average Runoff Depth = 6.67" 81.49% Pervious = 16.045 ac 18.51% Impervious = 3.645 ac Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFI LVA-Albemarle County 24-hr S1 50-Year 50-Year Rainfall=10.11" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 20 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Summary for Subcatchment 1S: Post Developed Conversion Runoff = 61.78 cfs @ 12.36 hrs, Volume= 10.952 af, Depth> 6.67" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs VA-Albemarle County 24-hr S1 50-Year 50-Year Rainfall=10.11" Area (ac) CN Description 10.800 74 >75% Grass cover, Good, HSG C 8.890 85 1/4 acre lots, 41% imp, HSG C 19.690 79 Weighted Average 16.045 81.49% Pervious Area 3.645 18.51% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 20.0 Direct Entry, Golf Course Run-off 10.0 Direct Entry, Post Developed Blocks 35A &29A 30.0 0 Total Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILVA Albemarle County 24-hr S1 50-Year 50-Year Rainfall=10.11" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler sin S17638 ©2011 HydroCAD Software Solutions LLC Page 21 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Subcatchment 1S: Post Developed Conversion Hydrograph Runoff 60 VA-Attie ST 1617s� � made Counfy 24-hr 50-Year Rainfall=10.11" 557 Runoff Area=19.690 ac 50� Runoff Volume=10.952 of R-u moff Depth->56T- R Tc=30.0 y 40- CN=79 0 a 30� 25::( 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILVA-Albemarle County 24-hr S1 50-Year 50-Year Rainfall=10.11" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 22 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Summary for Pond 2P: Bio-retention Pond ST#1 Conversion [85] Warning: Oscillations may require Finer Routing>1 Inflow Area = 19.690 ac, 18.51% Impervious, Inflow Depth > 6.67" for 50-Year event Inflow = 61.78 cfs @ 12.36 hrs, Volume= 10.952 of Outflow = 61.61 cfs @ 12.37 hrs, Volume= 10.952 af, Atten= 0%, Lag= 0.9 min Discarded = 0.28 cfs @ 12.37 hrs, Volume= 0.016 af Primary = 42.61 cfs @ 12.37 hrs, Volume= 10.490 af Secondary= 18.72 cfs @ 12.37 hrs, Volume= 0.447 af Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs/3 Peak Elev= 680.04'@ 12.37 hrs Surf.Area= 3,059 sf Storage= 5,422 cf Plug-Flow detention time=(not calculated: outflow precedes inflow) Center-of-Mass det. time=0.4 min ( 780.3 - 779.9 ) Volume Invert Avail.Storage Storage Description #1 678.00' 6,924 cf Custom Stage Data (Prismatic)isted below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 678.00 2,170 0 0 679.00 2,713 2,442 2,442 680.00 3,033 2,873 5,315 680.50 3,406 1,610 6,924 Device Routing Invert Outlet Devices #1 Discarded 678.00' 4.000 in/hr Exfiltration over Surface area Conductivity to Groundwater Elevation = 0.00' #2 Primary 670.50' 24.0" Round Culvert L= 64.0' RCP, square edge headwall, Ke= 0.500 Inlet/ Outlet Invert= 670.50'/670.00' S= 0.0078'/' Cc= 0.900 n= 0.013, Flow Area= 3.14 sf #3 Device 1 678.50' 36.0" x 41.0" Horiz. Orifice/Grate C= 0.600 in 36.0"x 41.0" Grate Limited to weir flow at low heads #4 Secondary 679.50' 18.0' long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 • Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILVA-Albemarle County 24-hr S1 50-Year 50-Year Rainfall=10.11" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 23 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Discarded OutFlow Max=0.28 cfs @ 12.37 hrs HW=680.03' (Free Discharge) L1=Exfiltration ( Controls 0.28 cfs) L3=Orifice/Grate (Passes 0.28 cfs of 61.04 cfs potential flow) Primary OutFlow Max=42.60 cfs @ 12.37 hrs HW=680.03' TW=672.10' (Fixed TW Elev= 672.10') L2=Culvert (Inlet Controls 42.60 cfs @ 13.56 fps) Secondary OutFlow Max=18.40 cfs @ 12.37 hrs HW=680.03' (Free Discharge) L4=Broad-Crested Rectangular Weir(Weir Controls 18.40 cfs @ 1.93 fps) Pond 2P: Bio-retention Pond ST#1 Conversion Hydrograph ■Inflow I 61.78 cfs 0 Outflow Inflow Area=19.690 ac — ■Discarded ■Primary 65� Peak 1e =680-04' ■Secondary 60-- Storage=5,422 cf F 50-: 42.61 cfs li 3 35'," 30- LL 25� " - - 5- 10� 0 Ic 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILVA-Albemarle County 24-hr S1 50-Year 50-Year Rainfall=10.11" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 24 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Pond 2P: Bio-retention Pond ST#1 Conversion Stage-Discharge 0 t��/✓. •Discarded `� . ' ••Secondary 680 Broad-Crested Rectangular Weir j w679 ea.-te j x4.,0 5'4 k A t riff 0 10 20 30 40 50 60 70 80 90 Discharge (cfs) Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFILVA-Albemarle County 24-hr S1 50-Year 50-Year Rainfall=10.11" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 25 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Stage-Area-Storage for Pond 2P: Bio-retention Pond ST#1 Conversion Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 678.00 2,170 0 680.20 3,182 5,936 678.05 2,197 109 680.25 3,220 6,096 678.10 2,224 220 680.30 3,257 6,258 678.15 2,251 332 680.35 3,294 6,422 678.20 2,279 445 680.40 3,331 6,587 678.25 2,306 559 680.45 3,369 6,755 678.30 2,333 675 680.50 3,406 6,924 678.35 2,360 793 678.40 2,387 911 678.45 2,414 1,031 678.50 2,442 1,153 678.55 2,469 1,276 678.60 2,496 1,400 678.65 2,523 1,525 678.70 2,550 1,652 678.75 2,577 1,780 678.80 2,604 1,910 678.85 2,632 2,041 678.90 2,659 2,173 678.95 2,686 2,307 679.00 2,713 2,442 679.05 2,729 2,578 679.10 2,745 2,714 679.15 2,761 2,852 679.20 2,777 2,991 679.25 2,793 3,130 679.30 2,809 3,270 679.35 2,825 3,411 679.40 2,841 3,552 679.45 2,857 3,695 679.50 2,873 3,838 679.55 2,889 3,982 679.60 2,905 4,127 679.65 2,921 4,273 679.70 2,937 4,419 679.75 2,953 4,566 679.80 2,969 4,714 679.85 2,985 4,863 679.90 3,001 5,013 679.95 3,017 5,163 680.00 3,033 5,315 680.05 3,070 5,467 680.10 3,108 5,622 680.15 3,145 5,778 Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFVA-Albemarle County 24-hr S1 100-Year 100-Year Rainfall=13.64" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 26 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Time span=1.00-20.00 hrs, dt=0.05 hrs, 381 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchmentl S: Post Developed Runoff Area=19.690 ac 18.51% Impervious Runoff Depth>9.63" Tc=30.0 min CN=79 Runoff=73.57 cfs 15.800 af Pond 2P: Bio-retention Pond ST#1 Peak Elev=680.22' Storage=6,015 cf Inflow=73.57 cfs 15.800 af Discarded=0.30 cfs 0.020 af Primary=43.12 cfs 14.807 af Secondary=29.92 cfs 0.968 af Outflow=73.33 cfs 15.795 af Total Runoff Area = 19.690 ac Runoff Volume = 15.800 af Average Runoff Depth = 9.63" 81.49% Pervious = 16.045 ac 18.51% Impervious = 3.645 ac Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFVA-Albemarle County 24-hr Si 100-Year 100-Year Rainfall=13.64" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 27 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Summary for Subcatchment 1S: Post Developed Conversion Runoff = 73.57 cfs @ 12.35 hrs, Volume= 15.800 af, Depth> 9.63" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs VA-Albemarle County 24-hr S1 100-Year 100-Year Rainfall=13.64" Area (ac) CN Description 10.800 74 >75% Grass cover, Good, HSG C * 8.890 85 1/4 acre lots, 41% imp, HSG C 19.690 79 Weighted Average 16.045 81.49% Pervious Area 3.645 18.51% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 20.0 Direct Entry, Golf Course Run-off 10.0 Direct Entry, Post Developed Blocks 35A &29A 30.0 0 Total Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFVA-Albemarle County 24-hr S1 100-Year 100-Year Rainfall=13.64" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 28 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Subcatchment 1S: Post Developed Conversion Hydrograph 807:- ®Runoff 1 73 57 Cfs 1 757' VA-Albemarle County 24-hr-S1 100-Year 7°--"' 100YearRaiinfall=13.64"_ 65- Runoff Area=19.690ac � 60-' Runoff Volume=15.800 of 55� 1 Runoff Depth>9.63" Tc 30.0min --t9 457' 3 40."' - 30� 7 25� ,' 20-? 0, 15-1 10 " _, ,�f,;'77 ✓ L y ,.,4'a°e,', t;;§",e''',>',',,,','70,1,,,,„,,, 1 2 3^ ^4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFVA-Albemarle County 24-hr S1 100-Year 100-Year Rainfall=13.64" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 29 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Summary for Pond 2P: Bio-retention Pond ST#1 Conversion Inflow Area = 19.690 ac, 18.51% Impervious, Inflow Depth > 9.63" for 100-Year event Inflow = 73.57 cfs @ 12.35 hrs, Volume= 15.800 of Outflow = 73.33 cfs @ 12.37 hrs, Volume= 15.795 af, Atten= 0%, Lag= 0.9 min Discarded = 0.30 cfs @ 12.37 hrs, Volume= 0.020 af Primary = 43.12 cfs @ 12.37 hrs, Volume= 14.807 af Secondary= 29.92 cfs @ 12.37 hrs, Volume= 0.968 af Routing by Stor-Ind method, Time Span= 1.00-20.00 hrs, dt= 0.05 hrs/ 3 Peak Elev= 680.22'@ 12.37 hrs Surf.Area= 3,201 sf Storage= 6,015 cf Plug-Flow detention time=0.5 min calculated for 15.795 af(100% of inflow) Center-of-Mass det. time=0.4 min ( 763.4- 763.0 ) Volume Invert Avail.Storage Storage Description #1 678.00' 6,924 cf Custom Stage Data (Prismatic)isted below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 678.00 2,170 0 0 679.00 2,713 2,442 2,442 680.00 3,033 2,873 5,315 680.50 3,406 1,610 6,924 Device Routing Invert Outlet Devices #1 Discarded 678.00' 4.000 in/hr Exfiltration over Surface area Conductivity to Groundwater Elevation = 0.00' #2 Primary 670.50' 24.0" Round Culvert L=64.0' RCP, square edge headwall, Ke= 0.500 Inlet/ Outlet Invert=670.50'/670.00' S= 0.0078'1 Cc= 0.900 n= 0.013, Flow Area 3.14 sf #3 Device 1 678.50' 36.0" x 41.0" Horiz. Orifice/Grate C= 0.600 in 36.0"x 41.0" Grate Limited to weir flow at low heads #4 Secondary 679.50' 18.0' long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFVA-Albemarle County 24-hr Si 100-Year 100-Year Rainfall=13.64" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 30 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Discarded OutFlow Max=0.30 cfs @ 12.37 hrs HW=680.22' (Free Discharge) t-1=Exfiltration ( Controls 0.30 cfs) t-3=Orifice/Grate (Passes 0.30 cfs of 64.73 cfs potential flow) Primary OutFlow Max=43.11 cfs @ 12.37 hrs HW=680.22' TW=672.10' (Fixed TW Elev= 672.10') t-2=Culvert (Inlet Controls 43.11 cfs @ 13.72 fps) Secondary OutFlow Max=29.64 cfs @ 12.37 hrs HW=680.22' (Free Discharge) t-4=Broad-Crested Rectangular Weir(Weir Controls 29.64 cfs @ 2.29 fps) Pond 2P: Bio-retention Pond ST#1 Conversion Hydrograph ■Inflow ® Outflow Inflow Area,=19:690 ac 7333 •Discarded Primary 80— Peak€Iev=680:22' ■Secondary Storage-6,015-cf 0 I 55� ,� 50� ®, I 45 0 40 -: LT. 35 30 �,,s i ...,_ ,,,,,,„. ,,,,,,,,, -,--„,„,,,,,,,i,,,,,,„... .,15� ,' ," %���/iS'%✓✓�1✓✓✓✓✓���✓�•��✓„�✓✓✓ iii , r�_ .„...,,,,y„,„,„„7,,,,,,..„, 5:-' ';.::,?:.1---■Iii■11•011111111111.111MIMIlli A IMMIIIIOIIIIIIIIIIIIIMIIMIIIV - ,,,im ° 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFVA-Albemarle County 24-hr S1 100-Year 100-Year Rainfall=13.64" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 31 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support,training materials, and additional features which are essential for actual design work. Pond 2P: Bio-retention Pond ST#1 Conversion Stage-Discharge ID�rJ//� •Discarded ��/,✓✓� ®Primary ��,////;4/�/'�_ ■Secondary i 680 I / I - Broad-Crested Rectangular Weir ,/ j � I I . 679 I I 678 , -, r 0 10 20 30 40 50 60 70 80 90 Discharge (cfs) Block 29a & 35a - BioRetention OLD TRAIL BLOCK 35 BIOFVA-Albemarle County 24-hr Si 100-Year 100-Year Rainfall=13.64" Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 5/15/2013 HydroCAD® 10.00 Sampler s/n S17638 ©2011 HydroCAD Software Solutions LLC Page 32 This report was prepared with the free HydroCAD SAMPLER,which is licensed for evaluation and educational use only. For actual design or modeling applications you must use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete printed documentation,technical support, training materials, and additional features which are essential for actual design work. Stage-Area-Storage for Pond 2P: Bio-retention Pond ST#1 Conversion Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 678.00 2,170 0 680.20 3,182 5,936 678.05 2,197 109 680.25 3,220 6,096 678.10 2,224 220 680.30 3,257 6,258 678.15 2,251 332 680.35 3,294 6,422 678.20 2,279 445 680.40 3,331 6,587 678.25 2,306 559 680.45 3,369 6,755 678.30 2,333 675 680.50 3,406 6,924 678.35 2,360 793 678.40 2,387 911 678.45 2,414 1,031 678.50 2,442 1,153 678.55 2,469 1,276 678.60 2,496 1,400 678.65 2,523 1,525 678.70 2,550 1,652 678.75 2,577 1,780 678.80 2,604 1,910 678.85 2,632 2,041 678.90 2,659 2,173 678.95 2,686 2,307 679.00 2,713 2,442 679.05 2,729 2,578 679.10 2,745 2,714 679.15 2,761 2,852 679.20 2,777 2,991 679.25 2,793 3,130 679.30 2,809 3,270 679.35 2,825 3,411 679.40 2,841 3,552 679.45 2,857 3,695 679.50 2,873 3,838 679.55 2,889 3,982 679.60 2,905 4,127 679.65 2,921 4,273 679.70 2,937 4,419 679.75 2,953 4,566 679.80 2,969 4,714 679.85 2,985 4,863 679.90 3,001 5,013 679.95 3,017 5,163 680.00 3,033 5,315 680.05 3,070 5,467 680.10 3,108 5,622 680.15 3,145 5,778