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WPO201600084 Calculations WPO VSMP 2017-05-15
Lord Byrd Residence COUNTY OF ALBEMARLE, VIRGINIA FINAL SITE PLAN DESIGN CALCULATIONS & NARRATIVE DECEMBER 5, 2016 REVISED MARCH 2, 2017 REVISED MARCH 27, 2017 ' • !••'�' ! • TIMMONS GROUP YOUR VISION ACHIEVED THROUGH OURS. Prepared by: Clint Shifflett, PE Timmons Group 608 Preston Avenue, Suite 200 Charlottesville, VA 22903 434.962.4337 1&110.LTH p /.•i ` o� rp': CLINT W. Ss � i %S F Lie. No. 54380 ,cc+ . o 31Z:7/ r'l w . G •,,--��/ONAL E;,��``: •N4NNN Table of Contents Section Title 1 Project Narrative 2 Virginia Runoff Reduction Method Worksheet Summary 1-Year, 2-Year and 10-Year Storm (Analysis Point 1) 3 Pre-Developed HyrdoCAD Calculations 4 Post-Developed HydroCAD Calculations Project Narrative: This project includes building a single family home, driveway and stormwater, management facilities. Limits of clearing and grading are 3.11 acres. Water Quality: In the proposed condition there will be 2.69 acres of managed turf and 0.42 acres of impervious cover. Per the Virginia Runoff Reduction Spreadsheet, this will require that 0.86 lbs. of phosphorus be removed per year. 0.36 lb/yr is being achieved with an onsite bioretention facility. The remaining 0.50 will be achieved by purchasing offsite nutrient credits. Water Quantity: Analysis point 1 is located where the existing stream outfalls at the eastern most property line of the parcel. At this point, the disturbed area is+/- 1% of the total drainage area. A bioretention facility is proposed and provides detention such that the total post-developed flow to the analysis point is less than the pre-developed conditions for the 1, 2, and 10-year storm events. The stream currently experiences localized flooding from 10-year storm events. Adequate channel requirements have been met upstream of analysis point 1 by converting all outflow points back to sheet flow with you use of level spreaders. To be conservative, level spreader lengths where calculated and specified using the 2-year storm event. Virginia Runoff Reduction Method Worksheet DEQ Virginia Runoff Reduction Method New Development Compliance Spreadsheet-Version 3.0 BMP Design Specifications List: 2013 Draft Stds&Specs Site Summary Total Rainfall=43 inches Site Land Cover Summary A soils B Soils C Soils D Soils Totals %of Total �4d+a.a:;+mei+a M;a+bkro a e a a 4 m+e m°+.roes Forest/Open(acres) 0.00 0.00 0.00 0.00 0.00 0 Managed Turf(acres) 0.00 2.69 0.00 0.00 2.69 86 Impervious Cover(acres) 0.00 0.42 0.00 0.00 0.42 14 3.11 100 Site Tv and Land Cover Nutrient Loads Site Rv 0.30 Treatment Volume ifti 3,401 TP Load(Ib/yr) 2.14 TN Load(Ib/yr) 15.29 Total TP Load Reduction Required(Ib/yr) 0.86 Site Compliance Summary Total Runoff Volume Reduction(Pe) 417 Total TP Load Reduction Achieved(Ib/yr) 0.36 Total TN Load Reduction Achieved(Ib/yr) 3.00 Remaining Post Development TP Load 178 (Ib/yr) Remaining TP Load Reduction(Ib/yr) 0.50 Required Summary Pnnt Virginia Runoff Reducffon Method Worksheet Drainage Area Summary :s•°a'e'>'ae:.*:!:en's':.'s°:',:!:s'a"a:":"e®s',.'«'ot D.A.A D.A.B D.A.C D.A.D D.A.E Total Forest/Open(aces) 0.00 0.00 0.00 0.00 0.00 0.00 Managed Turf(aces) 0.63 0.00 _ 0.00 0.00 0.00 0.63 Impervious Cover(acres) 0.17 0.00 0.00 0.00 0.00 0.17 Total Area(acres) 0.80 0.00 0.00 0.00 0.00 0.80 Drainage Area Compliance Summary w t::!:'iaya4e�aye''ae*A!ien'T.ya. i a i s a s:o ♦*-°_.a> e, . +nb„e na s%+"s°'+_«°+°aa�� D.A.A D.A.8 D.A.C D.A.D D.A.E Total TP Load Reduced(Ib/yr) 0.36 0.00 0.00 0.00 0.00 0.36 TN Load Reduced(Ib/yr) 3.00 0.00 0.00 0.00 0.00 3.00 Summary Print Virginia Runoff Reducton Method Worksheet Drainage Area A Summary Land Cover Summary "n'"e'°a^s'%«b 5:;:�:;;:f;ser:::.:e,.ZT,:'o4;:;seq A Soils B Soils C Soils D Soils Total %of Total Forest/Open(acres) 0.00 0.00 0.00 0.00 0.00 0 Managed Turf(acres) 0.00 0.63 0.00 0.00 0.63 79 Impervious Cover(acres) 0.00 0.17 0.00 0.00 0.17 21 0.80 BMP Selections Managed Turf Impervious TP Load from Downstream BMP Treatment Untreated TP Load TP Removed TP Remaining Practice Credit Area Cover Credit Volume(ft') Upstream to Practice(165) (Ib/Yr) (Ib/Yr) Treatment to be (acres) Area(acres) Practices(lbs) Employed 6.a.Bioretention 81 or Micro-Bioretention 0.63 0.17 1,043.63 0.00 0.65 0.36 0.29 81 or Urban Bioretention(Spec 119) Total Impervious Cover Treated(acres) 0.17 Total Turf Area Treated(acres) 0.63 Total TP Load Reduction Achieved in D.A. (Ib/yr) 0.36 Total TN Load Reduction Achieved in D.A. 3.00 (Ib/yr) Summary Pnnt IS 314\Q \ 4S , ) Pre-Development /BF-A Post-Dev. Detained 410 ,-:4,-,P.Z. ----\,...„ —4.,,,..-:,-.,_:•,;. D 6L Post-Development Total --\_— Post-Dev. Undetained Post Dev. Combined � ! — - \-- :Subcat 1Reach %ond Link Routing Diagram for LordByrd �� Prepared by TIMMONS GROUP, Printed 3/28/2017 HydroCAD®10.00 s/n 06538 02013 HydroCAD Software Solutions LLC LordByrd Type 1124-hr 1-Year Rainfall=2.99" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Pre-Development Runoff = 4.13 cfs @ 12.19 hrs, Volume= 19,386 cf, Depth> 0.30" 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 1-Year Rainfall=2.99" Area (ac) CN Description * 0.150 98 Gravel Driveway 7.150 61 Pasture/grassland/range, Good, HSG B 10.230 60 Woods, Fair, HSG B 17.530 61 Weighted Average 17.380 99.14% Pervious Area 0.150 0.86% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.9 200 0.0510 0.21 Sheet Flow, Grass: Dense n= 0.240 P2= 3.68" 3.2 385 0.0800 1.98 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 1.1 181 0.2850 2.67 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 20.2 766 Total Subcatchment 1S: Pre-Development Hyd rog ra ph / ®Runoff 4 Type Il 24-hr 1-Year Rainfall=2.99" Runoff Area=17.530 ac 3 Runoff Volume=19,386 cf Runoff Depth>0.30" 0 z- Flow Length=766' Tc=20.2 m i n CN=61 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Lord Byrd Type 1124-hr 1-Year Rainfall=2.99" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Pre-Development Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 5.00 0.19 0.00 0.00 18.50 2.78 0.29 0.32 5.25 0.20 0.00 0.00 18.75 2.79 0.29 0.31 5.50 0.21 0.00 0.00 19.00 2.80 0.29 0.30 5.75 0.23 0.00 0.00 19.25 2.82 0.30 0.29 6.00 0.24 0.00 0.00 19.50 2.83 0.30 0.28 6.25 0.25 0.00 0.00 19.75 2.84 0.31 0.27 6.50 0.27 0.00 0.00 20.00 2.85 0.31 0.26 6.75 0.28 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.31 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.34 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 0.44 0.00 0.00 9.25 0.46 0.00 0.00 9.50 0.49 0.00 0.00 9.75 0.51 0.00 0.00 10.00 0.54 0.00 0.00 10.25 0.57 0.00 0.00 10.50 0.61 0.00 0.00 10.75 0.65 0.00 0.00 11.00 0.70 0.00 0.00 11.25 0.77 0.00 0.00 11.50 0.85 0.00 0.00 11.75 1.16 0.00 0.00 12.00 1.98 0.07 0.97 12.25 2.11 0.10 3.85 12.50 2.20 0.12 2.04 12.75 2.26 0.13 1.32 13.00 2.31 0.14 1.03 13.25 2.35 0.15 0.88 13.50 2.39 0.16 0.78 13.75 2.42 0.17 0.70 14.00 2.45 0.18 0.64 14.25 2.48 0.19 0.58 14.50 2.50 0.20 0.55 14.75 2.53 0.20 0.53 15.00 2.55 0.21 0.51 15.25 2.57 0.22 0.49 15.50 2.59 0.22 0.47 15.75 2.61 0.23 0.44 16.00 2.63 0.24 0.42 16.25 2.65 0.24 0.40 16.50 2.66 0.25 0.38 16.75 2.68 0.25 0.38 17.00 2.70 0.26 0.37 17.25 2.71 0.26 0.36 17.50 2.73 0.27 0.35 17.75 2.74 0.27 0.34 18.00 2.75 0.28 0.33 18.25 2.77 0.28 0.33 LordByrd Type 1124-hr 1-Year Rainfall=2.99" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Summary for Subcatchment 2S: Post-Dev. Undetained Runoff = 3.98 cfs @ 12.19 hrs, Volume= 18,506 cf, Depth> 0.30" 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 1-Year Rainfall=2.99" Area (ac) CN Description * 0.250 98 Impervious Cover 6.120 61 Pasture/grassland/range, Good, HSG B 10.360 60 Woods, Fair, HSG B 16.730 61 Weighted Average 16.480 98.51% Pervious Area 0.250 1.49% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 16.0 200 0.0505 0.21 Sheet Flow, Grass: Dense n= 0.240 P2= 3.68" 1.9 200 0.0650 1.78 Shallow Concentrated Flow, Kv= 7.0 fps 2.0 295 0.2400 2.45 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 19.9 695 Total Subcatchment 2S: Post-Dev. Undetained Hyd rog ra ph `x Runoff IO 4 Type II 24-hr 1-Year Rainfall=2.99" Runoff Area=16.730 ac 3-' Runoff Volume=18,506 cf Runoff Depth>0.30" LL 2- Flow Length=695' Tc=19.9 min CN=61 o 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) LordByrd Type 1124-hr 1-Year Rainfall=2.99" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 2S: Post-Dev. Undetained Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 5.00 0.19 0.00 0.00 18.50 2.78 0.29 0.30 5.25 0.20 0.00 0.00 18.75 2.79 0.29 0.29 5.50 0.21 0.00 0.00 19.00 2.80 0.29 0.28 5.75 0.23 0.00 0.00 19.25 2.82 0.30 0.27 6.00 0.24 0.00 0.00 19.50 2.83 0.30 0.26 6.25 0.25 0.00 0.00 19.75 2.84 0.31 0.26 6.50 0.27 0.00 0.00 20.00 2.85 0.31 0.25 6.75 0.28 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.31 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.34 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 0.44 0.00 0.00 9.25 0.46 0.00 0.00 9.50 0.49 0.00 0.00 9.75 0.51 0.00 0.00 10.00 0.54 0.00 0.00 10.25 0.57 0.00 0.00 10.50 0.61 0.00 0.00 10.75 0.65 0.00 0.00 11.00 0.70 0.00 0.00 11.25 0.77 0.00 0.00 11.50 0.85 0.00 0.00 11.75 1.16 0.00 0.00 12.00 1.98 0.07 0.97 12.25 2.11 0.10 3.66 12.50 2.20 0.12 1.93 12.75 2.26 0.13 1.25 13.00 2.31 0.14 0.98 13.25 2.35 0.15 0.83 13.50 2.39 0.16 0.75 13.75 2.42 0.17 0.67 14.00 2.45 0.18 0.61 14.25 2.48 0.19 0.55 14.50 2.50 0.20 0.52 14.75 2.53 0.20 0.50 15.00 2.55 0.21 0.49 15.25 2.57 0.22 0.47 15.50 2.59 0.22 0.44 15.75 2.61 0.23 0.42 16.00 2.63 0.24 0.40 16.25 2.65 0.24 0.38 16.50 2.66 0.25 0.37 16.75 2.68 0.25 0.36 17.00 2.70 0.26 0.35 17.25 2.71 0.26 0.34 17.50 2.73 0.27 0.34 17.75 2.74 0.27 0.33 18.00 2.75 0.28 0.32 18.25 2.77 0.28 0.31 Lord Byrd Type II 24-hr 1-Year Rainfall=2.99" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Summary for Subcatchment 4S: Post-Dev. Detained [49] Hint: Tc<2dt may require smaller dt Runoff = 0.89 cfs @ 11.97 hrs, Volume= 1,708 cf, Depth> 0.59" 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 1-Year Rainfall=2.99" Area (ac) CN Description * 0.170 98 Impervious Cover 0.630 61 Pasture/grassland/range, Good, HSG B 0.800 69 Weighted Average 0.630 78.75% Pervious Area 0.170 21.25% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 4S: Post-Dev. Detained Hydrograph 0.95 __-r _. j ___. -__ L Runoff` 0.85: -- Type II 24-hr 0.81- . ,'— - j 1-Year Ra i nfa l l=2.99" 0.75: I.___-- - i 0.7_ —_ _ Runoff Area=0.800 ac 0.65 4----t 0.6 rt__ ; ^; __ Runoff Volume=1 ,708 cf Tic ass - -r-- 1 fi ._ __r_ Runoff Depth>0.59" 0.5 „ I 0.45Tc=5.0 min 0.353- , .... -}- +- V Irl=6S 0.3� r--- I __i 1 025 -1 I 1-- 0.2 i 1 ---I __4 -1-I ---1----4-------- 0.154.-' -- ----- 0.15= I I 1 I 0.1-e , i _.__..1._.---_I -- 1. -; 0.05_ 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) LordByrd Type 1124-hr 1-Year Rainfall=2.99" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 4S: Post-Dev. Detained Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 5.00 0.19 0.00 0.00 18.50 2.78 0.56 0.02 5.25 0.20 0.00 0.00 18.75 2.79 0.56 0.02 5.50 0.21 0.00 0.00 19.00 2.80 0.57 0.02 5.75 0.23 0.00 0.00 19.25 2.82 0.57 0.02 6.00 0.24 0.00 0.00 19.50 2.83 0.58 0.02 6.25 0.25 0.00 0.00 19.75 2.84 0.58 0.02 6.50 0.27 0.00 0.00 20.00 2.85 0.59 0.02 6.75 0.28 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.31 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.34 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 0.44 0.00 0.00 9.25 0.46 0.00 0.00 9.50 0.49 0.00 0.00 9.75 0.51 0.00 0.00 10.00 0.54 0.00 0.00 10.25 0.57 0.00 0.00 10.50 0.61 0.00 0.00 10.75 0.65 0.00 0.00 11.00 0.70 0.00 0.00 11.25 0.77 0.00 0.00 11.50 0.85 0.00 0.00 11.75 1.16 0.01 0.07 12.00 1.98 0.21 0.84 12.25 2.11 0.26 0.15 12.50 2.20 0.29 0.10 12.75 2.26 0.32 0.08 13.00 2.31 0.34 0.07 13.25 2.35 0.35 0.06 13.50 2.39 0.37 0.05 13.75 2.42 0.39 0.05 14.00 2.45 0.40 0.04 14.25 2.48 0.41 0.04 14.50 2.50 0.42 0.04 14.75 2.53 0.43 0.04 15.00 2.55 0.44 0.03 15.25 2.57 0.45 0.03 15.50 2.59 0.46 0.03 15.75 2.61 0.47 0.03 16.00 2.63 0.48 0.03 16.25 2.65 0.49 0.03 16.50 2.66 0.50 0.03 16.75 2.68 0.51 0.03 17.00 2.70 0.51 0.02 17.25 2.71 0.52 0.02 17.50 2.73 0.53 0.02 17.75 2.74 0.54 0.02 18.00 2.75 0.54 0.02 18.25 2.77 0.55 0.02 LordByrd Type 1124-hr 1-Year Rainfall=2.99" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Summary for Subcatchment 5S: Post-Development Total Runoff = 4.25 cfs @ 12.18 hrs, Volume= 19,399 cf, Depth> 0.30" 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 1-Year Rainfall=2.99" Area (ac) CN Description * 0.420 98 Impervious Cover 6.750 61 Pasture/grassland/range, Good, HSG B 10.360 60 Woods, Fair, HSG B 17.530 61 Weighted Average 17.110 97.60% Pervious Area 0.420 2.40% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.9 200 0.0510 0.21 Sheet Flow, Grass: Dense n= 0.240 P2= 3.68" 1.4 160 0.0700 1.85 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 2.0 295 0.2400 2.45 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 19.3 655 Total Subcatchment 5S: Post-Development Total Hydrograph 111 Runoff Type II 24-hr 4- 1-Year Rainfall=2.99" Runoff Area=17.530 ac 3- Runoff Volume=19,399 cf Runoff Depth>0.30" Flow Length=655' - 2 Tc=19.3 min CN=61 - 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) LordByrd Type 1124-hr 1-Year Rainfall=2.99" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 5S: Post-Development Total Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 5.00 0.19 0.00 0.00 18.50 2.78 0.29 0.32 5.25 0.20 0.00 0.00 18.75 2.79 0.29 0.31 5.50 0.21 0.00 0.00 19.00 2.80 0.29 0.30 5.75 0.23 0.00 0.00 19.25 2.82 0.30 0.29 6.00 0.24 0.00 0.00 19.50 2.83 0.30 0.28 6.25 0.25 0.00 0.00 19.75 2.84 0.31 0.27 6.50 0.27 0.00 0.00 20.00 2.85 0.31 0.26 6.75 0.28 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.31 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.34 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 0.44 0.00 0.00 9.25 0.46 0.00 0.00 9.50 0.49 0.00 0.00 9.75 0.51 0.00 0.00 10.00 0.54 0.00 0.00 10.25 0.57 0.00 0.00 10.50 0.61 0.00 0.00 10.75 0.65 0.00 0.00 11.00 0.70 0.00 0.00 11.25 0.77 0.00 0.00 11.50 0.85 0.00 0.00 11.75 1.16 0.00 0.00 12.00 1.98 0.07 1.11 12.25 2.11 0.10 3.81 12.50 2.20 0.12 1.98 12.75 2.26 0.13 1.29 13.00 2.31 0.14 1.01 13.25 2.35 0.15 0.87 13.50 2.39 0.16 0.78 13.75 2.42 0.17 0.70 14.00 2.45 0.18 0.63 14.25 2.48 0.19 0.58 14.50 2.50 0.20 0.55 14.75 2.53 0.20 0.53 15.00 2.55 0.21 0.51 15.25 2.57 0.22 0.49 15.50 2.59 0.22 0.46 15.75 2.61 0.23 0.44 16.00 2.63 0.24 0.42 16.25 2.65 0.24 0.39 16.50 2.66 0.25 0.38 16.75 2.68 0.25 0.37 17.00 2.70 0.26 0.37 17.25 2.71 0.26 0.36 17.50 2.73 0.27 0.35 17.75 2.74 0.27 0.34 18.00 2.75 0.28 0.33 18.25 2.77 0.28 0.32 LordByrd Type 1124-hr 1-Year Rainfall=2.99" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Summary for Pond 3P: BF-A Inflow Area= 34,848 sf, 21.25% Impervious, Inflow Depth > 0.59" for 1-Year event Inflow = 0.89 cfs @ 11.97 hrs, Volume= 1,708 cf Outflow = 0.04 cfs @ 14.77 hrs, Volume= 539 cf, Atten= 96%, Lag= 168.0 min Primary = 0.04 cfs @ 14.77 hrs, Volume= 539 cf Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 545.02' @ 14.77 hrs Surf.Area= 1,348 sf Storage= 1,183 cf Plug-Flow detention time= 287.4 min calculated for 537 cf(31% of inflow) Center-of-Mass det. time= 180.2 min ( 1,004.4- 824.2 ) Volume Invert Avail.Storage Storage Description #1 542.50' 5,489 cf Custom Stage Data(Prismatic) Listed below(Recaic) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) (%) (cubic-feet) (cubic-feet) 542.50 915 0.0 0 0 543.50 915 40.0 366 366 544.50 915 25.0 229 595 547.00 3,000 100.0 4,894 5,489 Device Routing Invert Outlet Devices #1 Primary 541.75' 12.0" Round Culvert L= 180.9' CPP, end-section conforming to fill, Ke= 0.500 Inlet/Outlet Invert= 541.75'/539.80' S= 0.0108'/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 0.79 sf #2 Device 1 545.00' 15.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.04 cfs @ 14.77 hrs HW=545.02' (Free Discharge) t1=Culvert (Passes 0.04 cfs of 5.87 cfs potential flow) t2=Orifice/Grate (Weir Controls 0.04 cfs @ 0.46 fps) LordByrd Type 1124-hr 1-Year Rainfall=2.99" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Pond 3P: BF-A H yd rog ra ph 1 I 1 I. ,� I I I I :Inflow --- ! -I 0.89 cfs - ----4----I -+ _-- •Primary) 0.95: /i/_ t_ ! ✓/ Inflow Area=34,848 sf osy I 1 0.85- 1 i y� } qs 0.8i-'� j -- ---— I -- r a k E leY V L - 00 f I ---1 Storage=1 ,183 cf__ 0.65.' i� I I -- r- - ---- - --------------- 6 0.553 // 1 i ( II I 0.5` I I F - --- ° 0.45'"/ / l I -- 1 - t--If — 0.4= i' 11- --�I----- i 1 — 0033 V/ � -- ± ---- I --j-- --- — '1--- 0.3-;'—/ -- r /- 1--- --1- +----f---i- 1 I -- I 1 f -__ 0.25 rt- -_- - I-- 1- - i 1 -- - -1- 0.21 1 0.15 �: ^�— - ' 1 0.1 --.,,,,,,,,,,,,,..-7 0.04 cfs .s.r... 0.05t4 OIL wr f-,iir,-z47-(-_1(,47 .2 7 i/4,,f .,,. 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 3P: BF-A Stage-Discharge r 547 / n Primary 1 546 // w Air Orifice/Grate 4 545 c 0 > m w 544 543j. 0 1 2 3 4 5 6 7 Discharge (cfs) LordByrd Type 1124-hr 1-Year Rainfall=2.99" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Pond 3P: BF-A Stage-Area-Storage Surface/HorizontallWetted Area(sq-ft) 0 200 400. 00 800 1,00 0 1,200 1,400 1,600 1,800 2,000 2,200 2,400 2,600 2,800 3,000 D Surface I ❑Storage 547 ! ( .. A000 546-' �,�� / ,' __ I I i - 545 4 i.11 �- II c 1 I I I 0 ' I 11 1 - 1 I I I i I i > ;-� I + L Ill I j ( jI 544- 1 1 11 I i 1 1 I '!: 1 I 1 1 1 1 I 1 1 1 II 1 i I lI i _ ; 1 I I 543- II .JJ Custom Stage Data >.,,A / / 0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000 Storage(cubic-feet) LordByrd Type 1124-hr 1-Year Rainfall=2.99" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Hydrograph for Pond 3P: BF-A Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) 5.00 0.00 0 542.50 0.00 5.50 0.00 0 542.50 0.00 6.00 0.00 0 542.50 0.00 6.50 0.00 0 542.50 0.00 7.00 0.00 0 542.50 0.00 7.50 0.00 0 542.50 0.00 8.00 0.00 0 542.50 0.00 8.50 0.00 0 542.50 0.00 9.00 0.00 0 542.50 0.00 9.50 0.00 0 542.50 0.00 10.00 0.00 0 542.50 0.00 10.50 0.00 0 542.50 0.00 11.00 0.00 0 542.50 0.00 11.50 0.00 0 542.50 0.00 12.00 0.84 428 543.77 0.00 12.50 0.10 820 544.72 0.00 13.00 0.07 960 544.84 0.00 13.50 0.05 1,064 544.93 0.00 14.00 0.04 1,147 544.99 0.00 14.50 0.04 1,181 545.02 0.03 15.00 0.03 1,182 545.02 0.04 15.50 0.03 1,180 545.02 0.03 16.00 0.03 1,178 545.02 0.03 16.50 0.03 1,176 545.01 0.03 17.00 0.02 1,175 545.01 0.02 17.50 0.02 1,174 545.01 0.02 18.00 0.02 1,173 545.01 0.02 18.50 0.02 1,172 545.01 0.02 19.00 0.02 1,171 545.01 0.02 19.50 0.02 1,170 545.01 0.02 20.00 0.02 1,169 545.01 0.02 LordByrd Type 1124-hr 1-Year Rainfall=2.99" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 Co 2013 HydroCAD Software Solutions LLC Stage-Discharge for Pond 3P: BF-A Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) 542.50 0.00 545.20 1.15 542.55 0.00 545.25 1.61 542.60 0.00 545.30 2.11 542.65 0.00 545.35 2.66 542.70 0.00 545.40 3.25 542.75 0.00 545.45 3.88 542.80 0.00 545.50 4.18 542.85 0.00 545.55 4.38 542.90 0.00 545.60 4.58 542.95 0.00 545.65 4.76 543.00 0.00 545.70 4.94 543.05 0.00 545.75 5.12 543.10 0.00 545.80 5.29 543.15 0.00 545.85 5.45 543.20 0.00 545.90 5.61 543.25 0.00 545.95 5.76 543.30 0.00 546.00 5.91 543.35 0.00 546.05 6.05 543.40 0.00 546.10 6.20 543.45 0.00 546.15 6.34 543.50 0.00 546.20 6.47 543.55 0.00 546.25 6.61 543.60 0.00 546.30 6.70 543.65 0.00 546.35 6.73 543.70 0.00 546.40 6.77 543.75 0.00 546.45 6.80 543.80 0.00 546.50 6.83 543.85 0.00 546.55 6.86 543.90 0.00 546.60 6.88 543.95 0.00 546.65 6.91 544.00 0.00 546.70 6.94 544.05 0.00 546.75 6.97 544.10 0.00 546.80 7.00 544.15 0.00 546.85 7.03 544.20 0.00 546.90 7.06 544.25 0.00 546.95 7.09 544.30 0.00 547.00 7.12 544.35 0.00 544.40 0.00 544.45 0.00 544.50 0.00 544.55 0.00 544.60 0.00 544.65 0.00 544.70 0.00 544.75 0.00 544.80 0.00 544.85 0.00 544.90 0.00 544.95 0.00 545.00 0.00 545.05 0.14 545.10 0.41 545.15 0.75 LordByrd Type 1124-hr 1-Year Rainfall=2.99" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 3P: BF-A Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 542.50 915 0 545.20 1,499 1,440 542.55 915 18 545.25 1,541 1,516 542.60 915 37 545.30 1,582 1,594 542.65 915 55 545.35 1,624 1,674 542.70 915 73 545.40 1,666 1,756 542.75 915 92 545.45 1,707 1,840 542.80 915 110 545.50 1,749 1,927 542.85 915 128 545.55 1,791 2,015 542.90 915 146 545.60 1,832 2,106 542.95 915 165 545.65 1,874 2,198 543.00 915 183 545.70 1,916 2,293 543.05 915 201 545.75 1,958 2,390 543.10 915 220 545.80 1,999 2,489 543.15 915 238 545.85 2,041 2,590 543.20 915 256 545.90 2,083 2,693 543.25 915 275 545.95 2,124 2,798 543.30 915 293 546.00 2,166 2,906 543.35 915 311 546.05 2,208 3,015 543.40 915 329 546.10 2,249 3,126 543.45 915 348 546.15 2,291 3,240 543.50 915 366 546.20 2,333 3,355 543.55 915 377 546.25 2,375 3,473 543.60 915 389 546.30 2,416 3,593 543.65 915 400 546.35 2,458 3,715 543.70 915 412 546.40 2,500 3,839 543.75 915 423 546.45 2,541 3,965 543.80 915 435 546.50 2,583 4,093 543.85 915 446 546.55 2,625 4,223 543.90 915 457 546.60 2,666 4,355 543.95 915 469 546.65 2,708 4,490 544.00 915 480 546.70 2,750 4,626 544.05 915 492 546.75 2,792 4,765 544.10 915 503 546.80 2,833 4,905 544.15 915 515 546.85 2,875 5,048 544.20 915 526 546.90 2,917 5,193 544.25 915 538 546.95 2,958 5,340 544.30 915 549 547.00 3,000 5,489 544.35 915 560 544.40 915 572 544.45 915 583 544.50 915 595 544.55 957 642 544.60 998 690 544.65 1,040 741 544.70 1,082 794 544.75 1,124 850 544.80 1,165 907 544.85 1,207 966 544.90 1,249 1,027 544.95 1,290 1,091 545.00 1,332 1,157 545.05 1,374 1,224 545.10 1,415 1,294 545.15 1,457 1,366 LordByrd Type 1124-hr 1-Year Rainfall=2.99" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 sin 06538 ©2013 HydroCAD Software Solutions LLC Summary for Link 6L: Post Dev. Combined Inflow Area = 763,607 sf, 2.40% Impervious, Inflow Depth > 0.30" for 1-Year event Inflow = 3.98 cfs @ 12.19 hrs, Volume= 19,045 cf Primary = 3.98 cfs @ 12.19 hrs, Volume= 19,045 cf, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 6L: Post Dev. Combined Hyd rog ra ph I Inflow .; S 0 Primary 3.98 cfS Inflow Area=763,607 sf 3— } I I 1 A 0 2� A. LL 1- 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) LordByrd Type 1124-hr 1-Year Rainfall=2.99" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Hydrograph for Link 6L: Post Dev. Combined Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 5.00 0.00 0.00 0.00 18.50 0.32 0.00 0.32 5.25 0.00 0.00 0.00 18.75 0.31 0.00 0.31 5.50 0.00 0.00 0.00 19.00 0.30 0.00 0.30 5.75 0.00 0.00 0.00 19.25 0.29 0.00 0.29 6.00 0.00 0.00 0.00 19.50 0.28 0.00 0.28 6.25 0.00 0.00 0.00 19.75 0.27 0.00 0.27 6.50 0.00 0.00 0.00 20.00 0.26 0.00 0.26 6.75 0.00 0.00 0.00 7.00 0.00 0.00 0.00 7.25 0.00 0.00 0.00 7.50 0.00 0.00 0.00 7.75 0.00 0.00 0.00 8.00 0.00 0.00 0.00 8.25 0.00 0.00 0.00 8.50 0.00 0.00 0.00 8.75 0.00 0.00 0.00 9.00 0.00 0.00 0.00 9.25 0.00 0.00 0.00 9.50 0.00 0.00 0.00 9.75 0.00 0.00 0.00 10.00 0.00 0.00 0.00 10.25 0.00 0.00 0.00 10.50 0.00 0.00 0.00 10.75 0.00 0.00 0.00 11.00 0.00 0.00 0.00 11.25 0.00 0.00 0.00 11.50 0.00 0.00 0.00 11.75 0.00 0.00 0.00 12.00 0.97 0.00 0.97 12.25 3.66 0.00 3.66 12.50 1.93 0.00 1.93 12.75 1.25 0.00 1.25 13.00 0.98 0.00 0.98 13.25 0.83 0.00 0.83 13.50 0.75 0.00 0.75 13.75 0.67 0.00 0.67 14.00 0.61 0.00 0.61 14.25 0.58 0.00 0.58 14.50 0.56 0.00 0.56 14.75 0.54 0.00 0.54 15.00 0.52 0.00 0.52 15.25 0.50 0.00 0.50 15.50 0.48 0.00 0.48 15.75 0.45 0.00 0.45 16.00 0.43 0.00 0.43 16.25 0.40 0.00 0.40 16.50 0.39 0.00 0.39 16.75 0.38 0.00 0.38 17.00 0.38 0.00 0.38 17.25 0.37 0.00 0.37 17.50 0.36 0.00 0.36 17.75 0.35 0.00 0.35 18.00 0.34 0.00 0.34 18.25 0.33 0.00 0.33 LordByrd Type 1124-hr 2-Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Pre-Development Runoff = 9.75 cfs @ 12.17 hrs, Volume= 36,137 cf, Depth> 0.57" 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 2-Year Rainfall=3.68" Area (ac) CN Description * 0.150 98 Gravel Driveway 7.150 61 Pasture/grassland/range, Good, HSG B 10.230 60 Woods, Fair, HSG B 17.530 61 Weighted Average 17.380 99.14% Pervious Area 0.150 0.86% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.9 200 0.0510 0.21 Sheet Flow, Grass: Dense n= 0.240 P2= 3.68" 3.2 385 0.0800 1.98 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 1.1 181 0.2850 2.67 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 20.2 766 Total Subcatchment 1S: Pre-Development Hyd rog ra ph Runoff 10 9 Type II 24-hr 2-Year Rainfall=3.68" 8- Runoff Area=17.530 ac 7 Runoff Volume=36,137 cf 6: Runoff Depth>0.57" 0 5 Flow Length=766' LL 4 Tc=20.2 min 3 CN=61 2- 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) LordByrd Type 1124-hr 2-Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Pre-Development Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 5.00 0.23 0.00 0.00 18.50 3.42 0.54 0.50 5.25 0.25 0.00 0.00 18.75 3.44 0.54 0.48 5.50 0.26 0.00 0.00 19.00 3.45 0.55 0.47 5.75 0.28 0.00 0.00 19.25 3.46 0.56 0.45 6.00 0.29 0.00 0.00 19.50 3.48 0.56 0.43 6.25 0.31 0.00 0.00 19.75 3.49 0.57 0.42 6.50 0.33 0.00 0.00 20.00 3.50 0.57 0.40 6.75 0.35 0.00 0.00 7.00 0.36 0.00 0.00 7.25 0.38 0.00 0.00 7.50 0.40 0.00 0.00 7.75 0.42 0.00 0.00 8.00 0.44 0.00 0.00 8.25 0.46 0.00 0.00 8.50 0.49 0.00 0.00 8.75 0.51 0.00 0.00 9.00 0.54 0.00 0.00 9.25 0.57 0.00 0.00 9.50 0.60 0.00 0.00 9.75 0.63 0.00 0.00 10.00 0.67 0.00 0.00 10.25 0.71 0.00 0.00 10.50 0.75 0.00 0.00 10.75 0.80 0.00 0.00 11.00 0.86 0.00 0.00 11.25 0.94 0.00 0.00 11.50 1.04 0.00 0.00 11.75 1.42 0.00 0.00 12.00 2.44 0.18 3.71 12.25 2.60 0.23 8.45 12.50 2.70 0.26 3.90 12.75 2.78 0.29 2.36 13.00 2.84 0.31 1.77 13.25 2.89 0.33 1.49 13.50 2.94 0.34 1.31 13.75 2.98 0.36 1.17 14.00 3.02 0.37 1.06 14.25 3.05 0.38 0.95 14.50 3.08 0.40 0.90 14.75 3.11 0.41 0.86 15.00 3.14 0.42 0.83 15.25 3.17 0.43 0.79 15.50 3.19 0.44 0.75 15.75 3.22 0.45 0.71 16.00 3.24 0.46 0.67 16.25 3.26 0.47 0.63 16.50 3.28 0.48 0.61 16.75 3.30 0.49 0.60 17.00 3.32 0.49 0.58 17.25 3.34 0.50 0.57 17.50 3.36 0.51 0.56 17.75 3.37 0.52 0.54 18.00 3.39 0.52 0.53 18.25 3.41 0.53 0.51 LordByrd Type 1124-hr 2-Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Summary for Subcatchment 2S: Post-Dev. Undetained Runoff = 9.39 cfs @ 12.16 hrs, Volume= 34,495 cf, Depth> 0.57" 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 2-Year Rainfall=3.68" Area (ac) CN Description * 0.250 98 Impervious Cover 6.120 61 Pasture/grassland/range, Good, HSG B 10.360 60 Woods, Fair, HSG B 16.730 61 Weighted Average 16.480 98.51% Pervious Area 0.250 1.49% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 16.0 200 0.0505 0.21 Sheet Flow, Grass: Dense n= 0.240 P2= 3.68" 1.9 200 0.0650 1.78 Shallow Concentrated Flow, Kv= 7.0 fps 2.0 295 0.2400 2.45 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 19.9 695 Total Subcatchment 2S: Post-Dev. Undetained Hyd rog ra ph ®Runoff 10- '. 9 � Type II 24-hr 2-Year Rainfall=3.68" 8 Runoff Area=16.730 ac 7 Runoff Volume=34,495 cf 17, 6 Runoff Depth>0.57" 5 Flow Length=695' LL 4 Tc=19.9 min 3 CN=61 2- 1- 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) LordByrd Type 1124-hr 2-Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 2S: Post-Dev. Undetained Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 5.00 0.23 0.00 0.00 18.50 3.42 0.54 0.47 5.25 0.25 0.00 0.00 18.75 3.44 0.54 0.46 5.50 0.26 0.00 0.00 19.00 3.45 0.55 0.44 5.75 0.28 0.00 0.00 19.25 3.46 0.56 0.43 6.00 0.29 0.00 0.00 19.50 3.48 0.56 0.41 6.25 0.31 0.00 0.00 19.75 3.49 0.57 0.40 6.50 0.33 0.00 0.00 20.00 3.50 0.57 0.38 6.75 0.35 0.00 0.00 7.00 0.36 0.00 0.00 7.25 0.38 0.00 0.00 7.50 0.40 0.00 0.00 7.75 0.42 0.00 0.00 8.00 0.44 0.00 0.00 8.25 0.46 0.00 0.00 8.50 0.49 0.00 0.00 8.75 0.51 0.00 0.00 9.00 0.54 0.00 0.00 9.25 0.57 0.00 0.00 9.50 0.60 0.00 0.00 9.75 0.63 0.00 0.00 10.00 0.67 0.00 0.00 10.25 0.71 0.00 0.00 10.50 0.75 0.00 0.00 10.75 0.80 0.00 0.00 11.00 0.86 0.00 0.00 11.25 0.94 0.00 0.00 11.50 1.04 0.00 0.00 11.75 1.42 0.00 0.00 12.00 2.44 0.18 3.67 12.25 2.60 0.23 8.01 12.50 2.70 0.26 3.67 12.75 2.78 0.29 2.23 13.00 2.84 0.31 1.68 13.25 2.89 0.33 1.41 13.50 2.94 0.34 1.25 13.75 2.98 0.36 1.12 14.00 3.02 0.37 1.01 14.25 3.05 0.38 0.91 14.50 3.08 0.40 0.86 14.75 3.11 0.41 0.82 15.00 3.14 0.42 0.79 15.25 3.17 0.43 0.75 15.50 3.19 0.44 0.72 15.75 3.22 0.45 0.68 16.00 3.24 0.46 0.64 16.25 3.26 0.47 0.60 16.50 3.28 0.48 0.58 16.75 3.30 0.49 0.57 17.00 3.32 0.49 0.56 17.25 3.34 0.50 0.54 17.50 3.36 0.51 0.53 17.75 3.37 0.52 0.52 18.00 3.39 0.52 0.50 18.25 3.41 0.53 0.49 Lord Byrd Type 1124-hr 2-Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Summary for Subcatchment 4S: Post-Dev. Detained [49] Hint: Tc<2dt may require smaller dt Runoff = 1.49 cfs @ 11.97 hrs, Volume= 2,772 cf, Depth> 0.95" 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 2-Year Rainfall=3.68" Area (ac) CN Description * 0.170 98 Impervious Cover 0.630 61 Pasture/grassland/range, Good, HSG B 0.800 69 Weighted Average 0.630 78.75% Pervious Area 0.170 21.25% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 4S: Post-Dev. Detained Hydrograph 11 Runoff 1.49 cfs 'f ' Type II 24-hr 2-Year Rainfall=3.68" j Runoff Area=0.800 ac 1 ' Runoff Volume=2,772 cf Runoff Depth>0.95" ° I Tc=5.0 min CN=69 .4 . 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) LordByrd Type 1124-hr 2-Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 4S: Post-Dev. Detained Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 5.00 0.23 0.00 0.00 18.50 3.42 0.91 0.03 5.25 0.25 0.00 0.00 18.75 3.44 0.92 0.03 5.50 0.26 0.00 0.00 19.00 3.45 0.92 0.03 5.75 0.28 0.00 0.00 19.25 3.46 0.93 0.03 6.00 0.29 0.00 0.00 19.50 3.48 0.94 0.03 6.25 0.31 0.00 0.00 19.75 3.49 0.95 0.02 6.50 0.33 0.00 0.00 20.00 3.50 0.96 0.02 6.75 0.35 0.00 0.00 7.00 0.36 0.00 0.00 7.25 0.38 0.00 0.00 7.50 0.40 0.00 0.00 7.75 0.42 0.00 0.00 8.00 0.44 0.00 0.00 8.25 0.46 0.00 0.00 8.50 0.49 0.00 0.00 8.75 0.51 0.00 0.00 9.00 0.54 0.00 0.00 9.25 0.57 0.00 0.00 9.50 0.60 0.00 0.00 9.75 0.63 0.00 0.00 10.00 0.67 0.00 0.00 10.25 0.71 0.00 0.00 10.50 0.75 0.00 0.00 10.75 0.80 0.00 0.00 11.00 0.86 0.00 0.00 11.25 0.94 0.00 0.00 11.50 1.04 0.00 0.02 11.75 1.42 0.06 0.23 12.00 2.44 0.39 1.38 12.25 2.60 0.47 0.22 12.50 2.70 0.52 0.15 12.75 2.78 0.55 0.12 13.00 2.84 0.59 0.10 13.25 2.89 0.61 0.09 13.50 2.94 0.64 0.08 13.75 2.98 0.66 0.07 14.00 3.02 0.68 0.06 14.25 3.05 0.70 0.06 14.50 3.08 0.71 0.06 14.75 3.11 0.73 0.05 15.00 3.14 0.75 0.05 15.25 3.17 0.76 0.05 15.50 3.19 0.78 0.05 15.75 3.22 0.79 0.04 16.00 3.24 0.80 0.04 16.25 3.26 0.81 0.04 16.50 3.28 0.82 0.04 16.75 3.30 0.84 0.04 17.00 3.32 0.85 0.04 17.25 3.34 0.86 0.03 17.50 3.36 0.87 0.03 17.75 3.37 0.88 0.03 18.00 3.39 0.89 0.03 18.25 3.41 0.90 0.03 Lord Byrd Type II 24-hr 2-Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Summary for Subcatchment 5S: Post-Development Total Runoff = 10.03 cfs @ 12.16 hrs, Volume= 36,158 cf, Depth> 0.57" 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 2-Year Rainfall=3.68" Area (ac) CN Description * 0.420 98 Impervious Cover 6.750 61 Pasture/grassland/range, Good, HSG B 10.360 60 Woods, Fair, HSG B 17.530 61 Weighted Average 17.110 97.60% Pervious Area 0.420 2.40% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.9 200 0.0510 0.21 Sheet Flow, Grass: Dense n= 0.240 P2= 3.68" 1.4 160 0.0700 1.85 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 2.0 295 0.2400 2.45 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 19.3 655 Total Subcatchment 5S: Post-Development Total Hydrograph 11- Runoff 10- Type II 24-hr 9- 2-Year Rainfall=3.68" 8- Runoff Area=17.530 ac 7- Runoff Volume=36,158 cf u 6- Runoff Depth>0.57" LL5 Flow Length=655' 4 Tc=19.3 min 3- CN=61 2-1 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Lord Byrd Type 1124-hr 2-Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 5S: Post-Development Total Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 5.00 0.23 0.00 0.00 18.50 3.42 0.54 0.50 5.25 0.25 0.00 0.00 18.75 3.44 0.54 0.48 5.50 0.26 0.00 0.00 19.00 3.45 0.55 0.47 5.75 0.28 0.00 0.00 19.25 3.46 0.56 0.45 6.00 0.29 0.00 0.00 19.50 3.48 0.56 0.43 6.25 0.31 0.00 0.00 19.75 3.49 0.57 0.42 6.50 0.33 0.00 0.00 20.00 3.50 0.57 0.40 6.75 0.35 0.00 0.00 7.00 0.36 0.00 0.00 7.25 0.38 0.00 0.00 7.50 0.40 0.00 0.00 7.75 0.42 0.00 0.00 8.00 0.44 0.00 0.00 8.25 0.46 0.00 0.00 8.50 0.49 0.00 0.00 8.75 0.51 0.00 0.00 9.00 0.54 0.00 0.00 9.25 0.57 0.00 0.00 9.50 0.60 0.00 0.00 9.75 0.63 0.00 0.00 10.00 0.67 0.00 0.00 10.25 0.71 0.00 0.00 10.50 0.75 0.00 0.00 10.75 0.80 0.00 0.00 11.00 0.86 0.00 0.00 11.25 0.94 0.00 0.00 11.50 1.04 0.00 0.00 11.75 1.42 0.00 0.00 12.00 2.44 0.18 4.15 12.25 2.60 0.23 8.27 12.50 2.70 0.26 3.75 12.75 2.78 0.29 2.29 13.00 2.84 0.31 1.74 13.25 2.89 0.33 1.47 13.50 2.94 0.34 1.30 13.75 2.98 0.36 1.16 14.00 3.02 0.37 1.05 14.25 3.05 0.38 0.95 14.50 3.08 0.40 0.90 14.75 3.11 0.41 0.86 15.00 3.14 0.42 0.82 15.25 3.17 0.43 0.79 15.50 3.19 0.44 0.75 15.75 3.22 0.45 0.71 16.00 3.24 0.46 0.67 16.25 3.26 0.47 0.63 16.50 3.28 0.48 0.61 16.75 3.30 0.49 0.60 17.00 3.32 0.49 0.58 17.25 3.34 0.50 0.57 17.50 3.36 0.51 0.56 17.75 3.37 0.52 0.54 18.00 3.39 0.52 0.53 18.25 3.41 0.53 0.51 LordByrd Type 1124-hr 2-Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Summary for Pond 3P: BF-A Inflow Area = 34,848 sf, 21.25% Impervious, Inflow Depth > 0.95" for 2-Year event Inflow = 1.49 cfs @ 11.97 hrs, Volume= 2,772 cf Outflow = 0.20 cfs @ 12.34 hrs, Volume= 1,597 cf, Atten= 87%, Lag= 22.2 min Primary = 0.20 cfs @ 12.34 hrs, Volume= 1,597 cf Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 545.06' @ 12.34 hrs Surf.Area= 1,384 sf Storage= 1,241 cf Plug-Flow detention time= 165.1 min calculated for 1,597 cf(58% of inflow) Center-of-Mass det. time= 75.7 min (888.5- 812.8) Volume Invert Avail.Storage Storage Description #1 542.50' 5,489 cf Custom Stage Data(Prismatic) Listed below(Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) (%) (cubic-feet) (cubic-feet) 542.50 915 0.0 0 0 543.50 915 40.0 366 366 544.50 915 25.0 229 595 547.00 3,000 100.0 4,894 5,489 Device Routing Invert Outlet Devices #1 Primary 541.75' 12.0" Round Culvert L= 180.9' CPP, end-section conforming to fill, Ke= 0.500 Inlet/Outlet Invert= 541.75'/539.80' S= 0.0108'/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 0.79 sf #2 Device 1 545.00' 15.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.20 cfs @ 12.34 hrs HW=545.06' (Free Discharge) t1=Culvert (Passes 0.20 cfs of 5.90 cfs potential flow) t2=Orifice/Grate (Weir Controls 0.20 cfs @ 0.81 fps) Lord Byrd Type 1124-hr 2-Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Pond 3P: BF-A Hydrograph I Inflow 1.49 cfs 0 Primary Inflow Area=34,848 sf Peak EIev=545.06' Storage=1 ,241 cf o I i 0.20 cfs o 8 9 10 11 12 13 14 5 16 17 18 19 20 Time (hours) Pond 3P: BF-A Stage-Discharge 547- ■Primary 546 �--'// /� Orifice/Grate j I • 545 o � I %i LT) Lu 544 • 543 0 1 2 3 4 5 6 7 Discharge (cfs) LordByrd Type 1124-hr 2-Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Pond 3P: BF-A Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200 2,400 2,600 2,800 3,000 0 Surface . . . . . . . . ®Storage 547 1 11 j ( 1 I Ii ! I i, I I 1 H ! "— 1 -----, '-- 546- I ! 1 1 III 1 I I I I I ai I ! w I j — 545- I o > 544- fil I ! —J ui - 11 1 I ! I I I I I ! I I — I i I 1 1__ i 1 543- I 0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000 Storage(cubic-feet) LordByrd Type 1124-hr 2-Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Hydrograph for Pond 3P: BF-A Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) 5.00 0.00 0 542.50 0.00 5.50 0.00 0 542.50 0.00 6.00 0.00 0 542.50 0.00 6.50 0.00 0 542.50 0.00 7.00 0.00 0 542.50 0.00 7.50 0.00 0 542.50 0.00 8.00 0.00 0 542.50 0.00 8.50 0.00 0 542.50 0.00 9.00 0.00 0 542.50 0.00 9.50 0.00 0 542.50 0.00 10.00 0.00 0 542.50 0.00 10.50 0.00 0 542.50 0.00 11.00 0.00 0 542.50 0.00 11.50 0.02 8 542.52 0.00 12.00 1.38 846 544.75 0.00 12.50 0.15 1,232 545.06 0.18 13.00 0.10 1,207 545.04 0.11 13.50 0.08 1,199 545.03 0.08 14.00 0.06 1,193 545.03 0.06 14.50 0.06 1,190 545.03 0.06 15.00 0.05 1,188 545.02 0.05 15.50 0.05 1,187 545.02 0.05 16.00 0.04 1,185 545.02 0.04 16.50 0.04 1,184 545.02 0.04 17.00 0.04 1,183 545.02 0.04 17.50 0.03 1,182 545.02 0.03 18.00 0.03 1,180 545.02 0.03 18.50 0.03 1,179 545.02 0.03 19.00 0.03 1,177 545.02 0.03 19.50 0.03 1,176 545.01 0.03 20.00 0.02 1,174 545.01 0.02 LordByrd Type 1124-hr 2-Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Stage-Discharge for Pond 3P: BF-A Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) 542.50 0.00 545.20 1.15 542.55 0.00 545.25 1.61 542.60 0.00 545.30 2.11 542.65 0.00 545.35 2.66 542.70 0.00 545.40 3.25 542.75 0.00 545.45 3.88 542.80 0.00 545.50 4.18 542.85 0.00 545.55 4.38 542.90 0.00 545.60 4.58 542.95 0.00 545.65 4.76 543.00 0.00 545.70 4.94 543.05 0.00 545.75 5.12 543.10 0.00 545.80 5.29 543.15 0.00 545.85 5.45 543.20 0.00 545.90 5.61 543.25 0.00 545.95 5.76 543.30 0.00 546.00 5.91 543.35 0.00 546.05 6.05 543.40 0.00 546.10 6.20 543.45 0.00 546.15 6.34 543.50 0.00 546.20 6.47 543.55 0.00 546.25 6.61 543.60 0.00 546.30 6.70 543.65 0.00 546.35 6.73 543.70 0.00 546.40 6.77 543.75 0.00 546.45 6.80 543.80 0.00 546.50 6.83 543.85 0.00 546.55 6.86 543.90 0.00 546.60 6.88 543.95 0.00 546.65 6.91 544.00 0.00 546.70 6.94 544.05 0.00 546.75 6.97 544.10 0.00 546.80 7.00 544.15 0.00 546.85 7.03 544.20 0.00 546.90 7.06 544.25 0.00 546.95 7.09 544.30 0.00 547.00 7.12 544.35 0.00 544.40 0.00 544.45 0.00 544.50 0.00 544.55 0.00 544.60 0.00 544.65 0.00 544.70 0.00 544.75 0.00 544.80 0.00 544.85 0.00 544.90 0.00 544.95 0.00 545.00 0.00 545.05 0.14 545.10 0.41 545.15 0.75 LordByrd Type 1124-hr 2-Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 3P: BF-A Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 542.50 915 0 545.20 1,499 1,440 542.55 915 18 545.25 1,541 1,516 542.60 915 37 545.30 1,582 1,594 542.65 915 55 545.35 1,624 1,674 542.70 915 73 545.40 1,666 1,756 542.75 915 92 545.45 1,707 1,840 542.80 915 110 545.50 1,749 1,927 542.85 915 128 545.55 1,791 2,015 542.90 915 146 545.60 1,832 2,106 542.95 915 165 545.65 1,874 2,198 543.00 915 183 545.70 1,916 2,293 543.05 915 201 545.75 1,958 2,390 543.10 915 220 545.80 1,999 2,489 543.15 915 238 545.85 2,041 2,590 543.20 915 256 545.90 2,083 2,693 543.25 915 275 545.95 2,124 2,798 543.30 915 293 546.00 2,166 2,906 543.35 915 311 546.05 2,208 3,015 543.40 915 329 546.10 2,249 3,126 543.45 915 348 546.15 2,291 3,240 543.50 915 366 546.20 2,333 3,355 543.55 915 377 546.25 2,375 3,473 543.60 915 389 546.30 2,416 3,593 543.65 915 400 546.35 2,458 3,715 543.70 915 412 546.40 2,500 3,839 543.75 915 423 546.45 2,541 3,965 543.80 915 435 546.50 2,583 4,093 543.85 915 446 546.55 2,625 4,223 543.90 915 457 546.60 2,666 4,355 543.95 915 469 546.65 2,708 4,490 544.00 915 480 546.70 2,750 4,626 544.05 915 492 546.75 2,792 4,765 544.10 915 503 546.80 2,833 4,905 544.15 915 515 546.85 2,875 5,048 544.20 915 526 546.90 2,917 5,193 544.25 915 538 546.95 2,958 5,340 544.30 915 549 547.00 3,000 5,489 544.35 915 560 544.40 915 572 544.45 915 583 544.50 915 595 544.55 957 642 544.60 998 690 544.65 1,040 741 544.70 1,082 794 544.75 1,124 850 544.80 1,165 907 544.85 1,207 966 544.90 1,249 1,027 544.95 1,290 1,091 545.00 1,332 1,157 545.05 1,374 1,224 545.10 1,415 1,294 545.15 1,457 1,366 LordByrd Type 1I 24-hr 2-Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Summary for Link 6L: Post Dev. Combined Inflow Area = 763,607 sf, 2.40% Impervious, Inflow Depth > 0.57" for 2-Year event Inflow = 9.50 cfs @ 12.17 hrs, Volume= 36,092 cf Primary = 9.50 cfs @ 12.17 hrs, Volume= 36,092 cf, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 6L: Post Dev. Combined Hyd rog ra ph / i I ®Inflow // j 1 99 50 c s ' j ! 0 Primary _-__ 9 50 cfs Inflow Area=763,607 sf - 9�/ - / I 8J ,-- + - 717111 I - ,% 1 y I I w g6•/ t i _ ' LL % ' - 3 t i– — 4 i 1 Ir 77-7 ;� / / /" .. / / r' 0 ;" 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) LordByrd Type 1124-hr 2-Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Hydrograph for Link 6L: Post Dev. Combined Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 5.00 0.00 0.00 0.00 18.50 0.51 0.00 0.51 5.25 0.00 0.00 0.00 18.75 0.49 0.00 0.49 5.50 0.00 0.00 0.00 19.00 0.47 0.00 0.47 5.75 0.00 0.00 0.00 19.25 0.46 0.00 0.46 6.00 0.00 0.00 0.00 19.50 0.44 0.00 0.44 6.25 0.00 0.00 0.00 19.75 0.42 0.00 0.42 6.50 0.00 0.00 0.00 20.00 0.41 0.00 0.41 6.75 0.00 0.00 0.00 7.00 0.00 0.00 0.00 7.25 0.00 0.00 0.00 7.50 0.00 0.00 0.00 7.75 0.00 0.00 0.00 8.00 0.00 0.00 0.00 8.25 0.00 0.00 0.00 8.50 0.00 0.00 0.00 8.75 0.00 0.00 0.00 9.00 0.00 0.00 0.00 9.25 0.00 0.00 0.00 9.50 0.00 0.00 0.00 9.75 0.00 0.00 0.00 10.00 0.00 0.00 0.00 10.25 0.00 0.00 0.00 10.50 0.00 0.00 0.00 10.75 0.00 0.00 0.00 11.00 0.00 0.00 0.00 11.25 0.00 0.00 0.00 11.50 0.00 0.00 0.00 11.75 0.00 0.00 0.00 12.00 3.67 0.00 3.67 12.25 8.20 0.00 8.20 12.50 3.85 0.00 3.85 12.75 2.35 0.00 2.35 13.00 1.79 0.00 1.79 13.25 1.50 0.00 1.50 13.50 1.33 0.00 1.33 13.75 1.19 0.00 1.19 14.00 1.07 0.00 1.07 14.25 0.97 0.00 0.97 14.50 0.91 0.00 0.91 14.75 0.88 0.00 0.88 15.00 0.84 0.00 0.84 15.25 0.80 0.00 0.80 15.50 0.76 0.00 0.76 15.75 0.72 0.00 0.72 16.00 0.68 0.00 0.68 16.25 0.64 0.00 0.64 16.50 0.62 0.00 0.62 16.75 0.61 0.00 0.61 17.00 0.59 0.00 0.59 17.25 0.58 0.00 0.58 17.50 0.57 0.00 0.57 17.75 0.55 0.00 0.55 18.00 0.54 0.00 0.54 18.25 0.52 0.00 0.52 LordByrd Type II 24-hr 10-Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD® 10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Pre-Development Runoff = 31.08 cfs @ 12.15 hrs, Volume= 97,681 cf, 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-Year Rainfall=5.56" Area (ac) CN Description * 0.150 98 Gravel Driveway 7.150 61 Pasture/grassland/range, Good, HSG B 10.230 60 Woods, Fair, HSG B 17.530 61 Weighted Average 17.380 99.14% Pervious Area 0.150 0.86% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.9 200 0.0510 0.21 Sheet Flow, Grass: Dense n= 0.240 P2= 3.68" 3.2 385 0.0800 1.98 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 1.1 181 0.2850 2.67 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 20.2 766 Total Subcatchment 1S: Pre-Development Hydrograph 34? , —j- �_ _ _ ___._._ _.__ Runoff 32- 31'. ,fs ; I 30 — _ Type II 2� hr__... 282'-'�� 1 � � i 10-Year Rainfall=5.56" 26- I + I- - / - i t Runoff Area=17.530 ac 24- I -- —i--Runoff Volume=97,681 -ci--- 1.5 18- I-_—` I __ Runoff Depth>1.54'r ' ' Flow Length=766' LL 16 T ; F. + ,4— — —� i_ -__ I Tc=20.2 min ,2- -1- CN-61 ,0_ t f t t % _ 8% 1 I i - 4;..--" 1 2=-/ 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) LordByrd Type 1124-hr 10-Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Pre-Development Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 5.00 0.35 0.00 0.00 18.50 5.17 1.47 1.05 5.25 0.37 0.00 0.00 18.75 5.19 1.49 1.02 5.50 0.40 0.00 0.00 19.00 5.21 1.50 0.98 5.75 0.42 0.00 0.00 19.25 5.24 1.51 0.95 6.00 0.44 0.00 0.00 19.50 5.26 1.52 0.91 6.25 0.47 0.00 0.00 19.75 5.27 1.54 0.88 6.50 0.50 0.00 0.00 20.00 5.29 1.55 0.84 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 0.74 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 0.91 0.00 0.00 9.75 0.95 0.00 0.00 10.00 1.01 0.00 0.00 10.25 1.07 0.00 0.00 10.50 1.13 0.00 0.00 10.75 1.21 0.00 0.00 11.00 1.31 0.00 0.00 11.25 1.42 0.00 0.06 11.50 1.57 0.01 0.35 11.75 2.15 0.10 1.70 12.00 3.69 0.66 17.56 12.25 3.93 0.78 24.97 12.50 4.09 0.86 10.18 12.75 4.20 0.92 5.73 13.00 4.29 0.97 4.15 13.25 4.37 1.01 3.43 13.50 4.44 1.05 2.99 13.75 4.50 1.08 2.65 14.00 4.56 1.11 2.37 14.25 4.61 1.14 2.13 14.50 4.66 1.17 2.00 14.75 4.70 1.19 1.90 15.00 4.75 1.22 1.82 15.25 4.79 1.24 1.73 15.50 4.82 1.26 1.64 15.75 4.86 1.29 1.55 16.00 4.89 1.31 1.46 16.25 4.92 1.32 1.37 16.50 4.96 1.34 1.32 16.75 4.98 1.36 1.28 17.00 5.01 1.38 1.25 17.25 5.04 1.39 1.22 17.50 5.07 1.41 1.19 17.75 5.10 1.43 1.15 18.00 5.12 1.44 1.12 18.25 5.15 1.46 1.09 LordByrd Type 1124-hr 10-Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Summary for Subcatchment 2S: Post-Dev. Undetained Runoff = 29.92 cfs @ 12.14 hrs, Volume= 93,237 cf, 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-Year Rainfall=5.56" Area (ac) CN Description * 0.250 98 Impervious Cover 6.120 61 Pasture/grassland/range, Good, HSG B 10.360 60 Woods, Fair, HSG B 16.730 61 Weighted Average 16.480 98.51% Pervious Area 0.250 1.49% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 16.0 200 0.0505 0.21 Sheet Flow, Grass: Dense n= 0.240 P2= 3.68" 1.9 200 0.0650 1.78 Shallow Concentrated Flow, Kv= 7.0 fps 2.0 295 0.2400 2.45 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 19.9 695 Total Subcatchment 2S: Post-Dev. Undetained Hydrograph / 3277 It MIMI Runoff 30 Type II 24-hr 26- -- _ __, 10-Year Rainfall=5.56" 24-;� I -- ' ___Runoff Area=16.730 ac 227/ , .L-- N 20 , � — — Runoff Volume=93,237 cf -- L �--- 13 18 —',_ Runoff Depth>1.54" 0 16- , , { i Flow Length=695' " 12J Tc=19.9 min i 10 —I it a -- CN=61 8 6 i a 2 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) LordByrd Type 1124-hr 10-Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 sin 06538 ©2013 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 2S: Post-Dev. Undetained Time Precip. Excess Runoff lime Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 5.00 0.35 0.00 0.00 18.50 5.17 1.47 1.00 5.25 0.37 0.00 0.00 18.75 5.19 1.49 0.97 5.50 0.40 0.00 0.00 19.00 5.21 1.50 0.94 5.75 0.42 0.00 0.00 19.25 5.24 1.51 0.90 6.00 0.44 0.00 0.00 19.50 5.26 1.52 0.87 6.25 0.47 0.00 0.00 19.75 5.27 1.54 0.84 6.50 0.50 0.00 0.00 20.00 5.29 1.55 0.80 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 0.74 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 0.91 0.00 0.00 9.75 0.95 0.00 0.00 10.00 1.01 0.00 0.00 10.25 1.07 0.00 0.00 10.50 1.13 0.00 0.00 10.75 1.21 0.00 0.00 11.00 1.31 0.00 0.00 11.25 1.42 0.00 0.06 11.50 1.57 0.01 0.34 11.75 2.15 0.10 1.66 12.00 3.69 0.66 17.21 12.25 3.93 0.78 23.59 12.50 4.09 0.86 9.56 12.75 4.20 0.92 5.40 13.00 4.29 0.97 3.93 13.25 4.37 1.01 3.26 13.50 4.44 1.05 2.85 13.75 4.50 1.08 2.52 14.00 4.56 1.11 2.26 14.25 4.61 1.14 2.03 14.50 4.66 1.17 1.90 14.75 4.70 1.19 1.82 15.00 4.75 1.22 1.73 15.25 4.79 1.24 1.65 15.50 4.82 1.26 1.56 15.75 4.86 1.29 1.48 16.00 4.89 1.31 1.39 16.25 4.92 1.32 1.30 16.50 4.96 1.34 1.26 16.75 4.98 1.36 1.22 17.00 5.01 1.38 1.19 17.25 5.04 1.39 1.16 17.50 5.07 1.41 1.13 17.75 5.10 1.43 1.10 18.00 5.12 1.44 1.07 18.25 5.15 1.46 1.04 Lord Byrd Type 1124-hr 10-Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD® 10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Summary for Subcatchment 4S: Post-Dev. Detained [49] Hint: Tc<2dt may require smaller dt Runoff = 3.42 cfs @ 11.96 hrs, Volume= 6,302 cf, Depth> 2.17" 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-Year Rainfall=5.56" Area (ac) CN Description * 0.170 98 Impervious Cover 0.630 61 Pasture/grassland/range, Good, HSG B 0.800 69 Weighted Average 0.630 78.75% Pervious Area 0.170 21.25% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 4S: Post-Dev. Detained Hydrograph II Runoff` 3.42 cfs Type II 24-hr 3, 10-Year Rainfall=5.56" I Runoff Area=0.800 ac Runoff Volume=6,302 cf in 12 2 Runoff Depth- 2.17" LL //` Tc=5.0 min CN=69 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) LordByrd Type 1124-hr 10-Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 4S: Post-Dev. Detained Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 5.00 0.35 0.00 0.00 18.50 5.17 2.08 0.06 5.25 0.37 0.00 0.00 18.75 5.19 2.10 0.05 5.50 0.40 0.00 0.00 19.00 5.21 2.11 0.05 5.75 0.42 0.00 0.00 19.25 5.24 2.13 0.05 6.00 0.44 0.00 0.00 19.50 5.26 2.14 0.05 6.25 0.47 0.00 0.00 19.75 5.27 2.16 0.05 6.50 0.50 0.00 0.00 20.00 5.29 2.17 0.04 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 0.74 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 0.91 0.00 0.00 9.75 0.95 0.00 0.00 10.00 1.01 0.00 0.01 10.25 1.07 0.01 0.01 10.50 1.13 0.01 0.02 10.75 1.21 0.02 0.03 11.00 1.31 0.03 0.05 11.25 1.42 0.05 0.07 11.50 1.57 0.09 0.12 11.75 2.15 0.27 0.79 12.00 3.69 1.07 3.04 12.25 3.93 1.22 0.46 12.50 4.09 1.32 0.31 12.75 4.20 1.40 0.23 13.00 4.29 1.46 0.20 13.25 4.37 1.51 0.17 13.50 4.44 1.56 0.15 13.75 4.50 1.61 0.13 14.00 4.56 1.64 0.12 14.25 4.61 1.68 0.11 14.50 4.66 1.71 0.11 14.75 4.70 1.74 0.10 15.00 4.75 1.77 0.10 15.25 4.79 1.80 0.09 15.50 4.82 1.83 0.09 15.75 4.86 1.86 0.08 16.00 4.89 1.88 0.08 16.25 4.92 1.90 0.07 16.50 4.96 1.92 0.07 16.75 4.98 1.95 0.07 17.00 5.01 1.97 0.07 17.25 5.04 1.99 0.07 17.50 5.07 2.01 0.06 17.75 5.10 2.03 0.06 18.00 5.12 2.05 0.06 18.25 5.15 2.06 0.06 Lord Byrd Type 1124-hr 10-Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Summary for Subcatchment 5S: Post-Development Total Runoff = 31.89 cfs @ 12.14 hrs, Volume= 97,724 cf, 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-Year Rainfall=5.56" Area (ac) CN Description * 0.420 98 Impervious Cover 6.750 61 Pasture/grassland/range, Good, HSG B 10.360 60 Woods, Fair, HSG B 17.530 61 Weighted Average 17.110 97.60% Pervious Area 0.420 2.40% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.9 200 0.0510 0.21 Sheet Flow, Grass: Dense n= 0.240 P2= 3.68" 1.4 160 0.0700 1.85 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 2.0 295 0.2400 2.45 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 19.3 655 Total Subcatchment 5S: Post-Development Total H yd rog ra ph , 1 --t -I _..-_+_ U Runoff ---I—_ 89 cfsJ --_4-_.—L 32=! _.. 1 4_ 4___ . - .,.. Type II 24-hr- 30- i 28::" ; 10-Year Rajnfall=5.56 26 +_1- _.-- —+ Runoff Area=47.530 ac - 22=' j ; Runoff Volume=97,724 cf H 7' 20 1 j i 13 ,_ 1 +— 1 - -- - ----- ---Runoff Depth>1.54" 11! 1 _i___ + Flof Length=655' Tc-13.3 min - +- i � I i i I I - 8, ,_ iI 1 ! 1 1 1 6J -4- —I "- - a 4� -4_ 2 i 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) LordByrd Type 1124-hr 10-Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 5S: Post-Development Total Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 5.00 0.35 0.00 0.00 18.50 5.17 1.47 1.05 5.25 0.37 0.00 0.00 18.75 5.19 1.49 1.02 5.50 0.40 0.00 0.00 19.00 5.21 1.50 0.98 5.75 0.42 0.00 0.00 19.25 5.24 1.51 0.95 6.00 0.44 0.00 0.00 19.50 5.26 1.52 0.91 6.25 0.47 0.00 0.00 19.75 5.27 1.54 0.87 6.50 0.50 0.00 0.00 20.00 5.29 1.55 0.84 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 0.74 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 0.91 0.00 0.00 9.75 0.95 0.00 0.00 10.00 1.01 0.00 0.00 10.25 1.07 0.00 0.00 10.50 1.13 0.00 0.00 10.75 1.21 0.00 0.00 11.00 1.31 0.00 0.00 11.25 1.42 0.00 0.07 11.50 1.57 0.01 0.37 11.75 2.15 0.10 1.84 12.00 3.69 0.66 19.01 12.25 3.93 0.78 24.16 12.50 4.09 0.86 9.69 12.75 4.20 0.92 5.52 13.00 4.29 0.97 4.06 13.25 4.37 1.01 3.39 13.50 4.44 1.05 2.97 13.75 4.50 1.08 2.63 14.00 4.56 1.11 2.36 14.25 4.61 1.14 2.12 14.50 4.66 1.17 1.99 14.75 4.70 1.19 1.90 15.00 4.75 1.22 1.81 15.25 4.79 1.24 1.73 15.50 4.82 1.26 1.64 15.75 4.86 1.29 1.54 16.00 4.89 1.31 1.45 16.25 4.92 1.32 1.36 16.50 4.96 1.34 1.32 16.75 4.98 1.36 1.28 17.00 5.01 1.38 1.25 17.25 5.04 1.39 1.22 17.50 5.07 1.41 1.19 17.75 5.10 1.43 1.15 18.00 5.12 1.44 1.12 18.25 5.15 1.46 1.09 LordByrd Type 1124-hr 10-Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Summary for Pond 3P: BF-A Inflow Area= 34,848 sf, 21.25% Impervious, Inflow Depth > 2.17" for 10-Year event Inflow = 3.42 cfs @ 11.96 hrs, Volume= 6,302 cf Outflow = 2.99 cfs @ 12.01 hrs, Volume= 5,116 cf, Atten= 13%, Lag= 2.8 min Primary = 2.99 cfs @ 12.01 hrs, Volume= 5,116 cf Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 545.38'@ 12.01 hrs Surf.Area= 1,647 sf Storage= 1,720 cf Plug-Flow detention time= 79.7 min calculated for 5,099 cf(81% of inflow) Center-of-Mass det. time= 25.8 min (821.1 - 795.3) Volume Invert Avail.Storage Storage Description #1 542.50' 5,489 cf Custom Stage Data(Prismatic) Listed below(Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) (%) (cubic-feet) (cubic-feet) 542.50 915 0.0 0 0 543.50 915 40.0 366 366 544.50 915 25.0 229 595 547.00 3,000 100.0 4,894 5,489 Device Routing Invert Outlet Devices #1 Primary 541.75' 12.0" Round Culvert L= 180.9' CPP, end-section conforming to fill, Ke= 0.500 Inlet/Outlet Invert= 541.75'/539.80' S= 0.0108'/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 0.79 sf #2 Device 1 545.00' 15.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=2.91 cfs @ 12.01 hrs HW=545.37' (Free Discharge) t1=Culvert (Passes 2.91 cfs of 6.11 cfs potential flow) L2=Orifice/Grate (Weir Controls 2.91 cfs @ 1.99 fps) LordByrd Type 1124-hr 10-Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Pond 3P: BF-A '' H yd rog ra ph Inflow i 73-712—Tc 0 Primary I Inflow Area=34,848 sf 3 2.9 cfs Peak Elev=545.38' Storage=1 ,720 cf F. V O � I f 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 3P: BF-A Stage-Discharge 547 ®Primary 546 411111111111I_____ ri Orifice/Grate — 545 o 544 — — I 543 0 1 2 3 4 5 6 7 Discharge (cfs) LordByrd Type 1124-hr 10-Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Pond 3P: BF-A Stage-Area-Storage Surface/HorizontaUWetted Area(sq-ft) 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200 2,400 2,600 2,800 3,000 0 Surface -0 Storage I I I I I 547 1 I 1 1 1 1 i j —__.u. _ I ' 011011.5".- �t// — 546; 1 I I I I i I II i - -1 —o 545- I I I I I c I I I I I I I I '°r. - I w 544-f ! 1 I 1 1 l I ' 1 I I I 543 I I I I I I I I 1 J /J /l / 0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000 Storage(cubic-feet) LordByrd Type 1124-hr 10-Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Hydrograph for Pond 3P: BF-A Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) 5.00 0.00 0 542.50 0.00 5.50 0.00 0 542.50 0.00 6.00 0.00 0 542.50 0.00 6.50 0.00 0 542.50 0.00 7.00 0.00 0 542.50 0.00 7.50 0.00 0 542.50 0.00 8.00 0.00 0 542.50 0.00 8.50 0.00 0 542.50 0.00 9.00 0.00 0 542.50 0.00 9.50 0.00 0 542.50 0.00 10.00 0.01 5 542.51 0.00 10.50 0.02 28 542.58 0.00 11.00 0.05 85 542.73 0.00 11.50 0.12 222 543.11 0.00 12.00 3.04 1,718 545.38 2.98 12.50 0.31 1,279 545.09 0.35 13.00 0.20 1,243 545.06 0.21 13.50 0.15 1,226 545.05 0.16 14.00 0.12 1,215 545.04 0.13 14.50 0.11 1,209 545.04 0.11 15.00 0.10 1,205 545.04 0.10 15.50 0.09 1,202 545.03 0.09 16.00 0.08 1,198 545.03 0.08 16.50 0.07 1,196 545.03 0.07 17.00 0.07 1,194 545.03 0.07 17.50 0.06 1,193 545.03 0.06 18.00 0.06 1,192 545.03 0.06 18.50 0.06 1,190 545.03 0.06 19.00 0.05 1,189 545.02 0.05 19.50 0.05 1,188 545.02 0.05 20.00 0.04 1,186 545.02 0.04 LordByrd Type II 24-hr 10-Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Stage-Discharge for Pond 3P: BF-A Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) 542.50 0.00 545.20 1.15 542.55 0.00 545.25 1.61 542.60 0.00 545.30 2.11 542.65 0.00 545.35 2.66 542.70 0.00 545.40 3.25 542.75 0.00 545.45 3.88 542.80 0.00 545.50 4.18 542.85 0.00 545.55 4.38 542.90 0.00 545.60 4.58 542.95 0.00 545.65 4.76 543.00 0.00 545.70 4.94 543.05 0.00 545.75 5.12 543.10 0.00 545.80 5.29 543.15 0.00 545.85 5.45 543.20 0.00 545.90 5.61 543.25 0.00 545.95 5.76 543.30 0.00 546.00 5.91 543.35 0.00 546.05 6.05 543.40 0.00 546.10 6.20 543.45 0.00 546.15 6.34 543.50 0.00 546.20 6.47 543.55 0.00 546.25 6.61 543.60 0.00 546.30 6.70 543.65 0.00 546.35 6.73 543.70 0.00 546.40 6.77 543.75 0.00 546.45 6.80 543.80 0.00 546.50 6.83 543.85 0.00 546.55 6.86 543.90 0.00 546.60 6.88 543.95 0.00 546.65 6.91 544.00 0.00 546.70 6.94 544.05 0.00 546.75 6.97 544.10 0.00 546.80 7.00 544.15 0.00 546.85 7.03 544.20 0.00 546.90 7.06 544.25 0.00 546.95 7.09 544.30 0.00 547.00 7.12 544.35 0.00 544.40 0.00 544.45 0.00 544.50 0.00 544.55 0.00 544.60 0.00 544.65 0.00 544.70 0.00 544.75 0.00 544.80 0.00 544.85 0.00 544.90 0.00 544.95 0.00 545.00 0.00 545.05 0.14 545.10 0.41 545.15 0.75 LordByrd Type 1124-hr 10-Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 3P: BF-A Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 542.50 915 0 545.20 1,499 1,440 542.55 915 18 545.25 1,541 1,516 542.60 915 37 545.30 1,582 1,594 542.65 915 55 545.35 1,624 1,674 542.70 915 73 545.40 1,666 1,756 542.75 915 92 545.45 1,707 1,840 542.80 915 110 545.50 1,749 1,927 542.85 915 128 545.55 1,791 2,015 542.90 915 146 545.60 1,832 2,106 542.95 915 165 545.65 1,874 2,198 543.00 915 183 545.70 1,916 2,293 543.05 915 201 545.75 1,958 2,390 543.10 915 220 545.80 1,999 2,489 543.15 915 238 545.85 2,041 2,590 543.20 915 256 545.90 2,083 2,693 543.25 915 275 545.95 2,124 2,798 543.30 915 293 546.00 2,166 2,906 543.35 915 311 546.05 2,208 3,015 543.40 915 329 546.10 2,249 3,126 543.45 915 348 546.15 2,291 3,240 543.50 915 366 546.20 2,333 3,355 543.55 915 377 546.25 2,375 3,473 543.60 915 389 546.30 2,416 3,593 543.65 915 400 546.35 2,458 3,715 543.70 915 412 546.40 2,500 3,839 543.75 915 423 546.45 2,541 3,965 543.80 915 435 546.50 2,583 4,093 543.85 915 446 546.55 2,625 4,223 543.90 915 457 546.60 2,666 4,355 543.95 915 469 546.65 2,708 4,490 544.00 915 480 546.70 2,750 4,626 544.05 915 492 546.75 2,792 4,765 544.10 915 503 546.80 2,833 4,905 544.15 915 515 546.85 2,875 5,048 544.20 915 526 546.90 2,917 5,193 544.25 915 538 546.95 2,958 5,340 544.30 915 549 547.00 3,000 5,489 544.35 915 560 544.40 915 572 544.45 915 583 544.50 915 595 544.55 957 642 544.60 998 690 544.65 1,040 741 544.70 1,082 794 544.75 1,124 850 544.80 1,165 907 544.85 1,207 966 544.90 1,249 1,027 544.95 1,290 1,091 545.00 1,332 1,157 545.05 1,374 1,224 545.10 1,415 1,294 545.15 1,457 1,366 LordByrd Type 1124-hr 10-Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Summary for Link 6L: Post Dev. Combined Inflow Area = 763,607 sf, 2.40% Impervious, Inflow Depth > 1.55" for 10-Year event Inflow = 31.00 cfs @ 12.14 hrs, Volume= 98,353 cf Primary = 31.00 cfs @ 12.14 hrs, Volume= 98,353 cf, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 6L: Post Dev. Combined H yd rog ra ph Z I f1 , - — I I 1 ■Inflow � 34I/ 31.00 c's � 0 Primary 32'_' - —-t31 00 cfs - r Inflow Area=763,607 sf_ 28- I I ! I I I � 26- ! I f I I a- — I x I i- — I —4 i 24: 1 � I 22= ! 1 ;- *— � I 4 4 H 20: I . �_._. ._.__�._._� 18- i I' -[— -- I 1-- -- --- .__--4_ _0 16= I I ; i 1 0 ' I it .4_..—.— .__--�---_i----- E 14: I 1 i I I 12- I I I 10- i I I I I 6 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) LordByrd Type 1124-hr 10-Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Hydrograph for Link 6L: Post Dev. Combined Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 5.00 0.00 0.00 0.00 18.50 1.06 0.00 1.06 5.25 0.00 0.00 0.00 18.75 1.03 0.00 1.03 5.50 0.00 0.00 0.00 19.00 0.99 0.00 0.99 5.75 0.00 0.00 0.00 19.25 0.96 0.00 0.96 6.00 0.00 0.00 0.00 19.50 0.92 0.00 0.92 6.25 0.00 0.00 0.00 19.75 0.88 0.00 0.88 6.50 0.00 0.00 0.00 20.00 0.85 0.00 0.85 6.75 0.00 0.00 0.00 7.00 0.00 0.00 0.00 7.25 0.00 0.00 0.00 7.50 0.00 0.00 0.00 7.75 0.00 0.00 0.00 8.00 0.00 0.00 0.00 8.25 0.00 0.00 0.00 8.50 0.00 0.00 0.00 8.75 0.00 0.00 0.00 9.00 0.00 0.00 0.00 9.25 0.00 0.00 0.00 9.50 0.00 0.00 0.00 9.75 0.00 0.00 0.00 10.00 0.00 0.00 0.00 10.25 0.00 0.00 0.00 10.50 0.00 0.00 0.00 10.75 0.00 0.00 0.00 11.00 0.00 0.00 0.00 11.25 0.06 0.00 0.06 11.50 0.34 0.00 0.34 11.75 1.66 0.00 1.66 12.00 20.18 0.00 20.18 12.25 24.16 0.00 24.16 12.50 9.91 0.00 9.91 12.75 5.64 0.00 5.64 13.00 4.14 0.00 4.14 13.25 3.44 0.00 3.44 13.50 3.01 0.00 3.01 13.75 2.66 0.00 2.66 14.00 2.38 0.00 2.38 14.25 2.14 0.00 2.14 14.50 2.01 0.00 2.01 14.75 1.92 0.00 1.92 15.00 1.83 0.00 1.83 15.25 1.74 0.00 1.74 15.50 1.65 0.00 1.65 15.75 1.56 0.00 1.56 16.00 1.47 0.00 1.47 16.25 1.38 0.00 1.38 16.50 1.33 0.00 1.33 16.75 1.29 0.00 1.29 17.00 1.26 0.00 1.26 17.25 1.23 0.00 1.23 17.50 1.20 0.00 1.20 17.75 1.16 0.00 1.16 18.00 1.13 0.00 1.13 18.25 1.10 0.00 1.10 LordByrd Type II 24-hr 100-Year Rainfall=8.88" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Summary for Subcatchment 4S: Post-Dev. Detained [49] Hint: Tc<2dt may require smaller dt Runoff = 7.28 cfs @ 11.96 hrs, Volume= 13,743 cf, Depth> 4.73" 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 100-Year Rainfall=8.88" Area (ac) CN Description 0.170 98 Impervious Cover 0.630 61 Pasture/grassland/range, Good, HSG B 0.800 69 Weighted Average 0.630 78.75% Pervious Area 0.170 21.25% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 4S: Post-Dev. Detained Hydrograph 8- Runoff j 7.28 cfs - Type II 24-hr 100-Year Rainfall=8.88" 6 Runoff Area=0.800 ac 5- Runoff Volume=13,743 cf Runoff Depth>4.73" 4 '11 Tc=5.0 min 3 i ! CN=69 2- 1 I 11 1 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) LordByrd Type 1124-hr 100-Year Rainfall=8.88" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 4S: Post-Dev. Detained Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 5.00 0.56 0.00 0.00 18.50 8.26 4.57 0.10 5.25 0.60 0.00 0.00 18.75 8.29 4.60 0.10 5.50 0.63 0.00 0.00 19.00 8.33 4.63 0.10 5.75 0.67 0.00 0.00 19.25 8.36 4.66 0.09 6.00 0.71 0.00 0.00 19.50 8.39 4.69 0.09 6.25 0.75 0.00 0.00 19.75 8.42 4.71 0.09 6.50 0.79 0.00 0.00 20.00 8.45 4.74 0.08 6.75 0.84 0.00 0.00 7.00 0.88 0.00 0.00 7.25 0.92 0.00 0.00 7.50 0.97 0.00 0.00 7.75 1.02 0.00 0.01 8.00 1.07 0.01 0.01 8.25 1.12 0.01 0.01 8.50 1.17 0.02 0.02 8.75 1.24 0.02 0.03 9.00 1.31 0.03 0.03 9.25 1.38 0.05 0.04 9.50 1.45 0.06 0.05 9.75 1.52 0.08 0.06 10.00 1.61 0.10 0.07 10.25 1.70 0.12 0.09 10.50 1.81 0.15 0.11 10.75 1.94 0.20 0.14 11.00 2.09 0.25 0.18 11.25 2.27 0.32 0.25 11.50 2.51 0.43 0.36 11.75 3.44 0.92 2.06 12.00 5.89 2.62 6.31 12.25 6.27 2.93 0.91 12.50 6.53 3.13 0.60 12.75 6.71 3.27 0.45 13.00 6.86 3.40 0.38 13.25 6.98 3.50 0.33 13.50 7.10 3.59 0.29 13.75 7.19 3.67 0.26 14.00 7.28 3.75 0.23 14.25 7.36 3.81 0.21 14.50 7.44 3.88 0.20 14.75 7.51 3.94 0.19 15.00 7.58 3.99 0.18 15.25 7.64 4.05 0.17 15.50 7.70 4.10 0.16 15.75 7.76 4.15 0.15 16.00 7.81 4.19 0.14 16.25 7.86 4.23 0.14 16.50 7.91 4.28 0.13 16.75 7.96 4.32 0.13 17.00 8.01 4.36 0.13 17.25 8.05 4.39 0.12 17.50 8.10 4.43 0.12 17.75 8.14 4.47 0.11 18.00 8.18 4.50 0.11 18.25 8.22 4.54 0.11 LordByrd Type II 24-hr 100-Year Rainfall=8.88" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Summary for Subcatchment 5S: Post-Development Total Runoff = 81.26 cfs @ 12.12 hrs, Volume= 239,827 cf, Depth> 3.77" 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 100-Year Rainfall=8.88" Area (ac) CN Description * 0.420 98 Impervious Cover 6.750 61 Pasture/grassland/range, Good, HSG B 10.360 60 Woods, Fair, HSG B 17.530 61 Weighted Average 17.110 97.60% Pervious Area 0.420 2.40% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.9 200 0.0510 0.21 Sheet Flow, Grass: Dense n= 0.240 P2= 3.68" 1.4 160 0.0700 1.85 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 2.0 295 0.2400 2.45 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 19.3 655 Total Subcatchment 5S: Post-Development Total Hyd rog ra ph —t._-- / 90. -- Runoff 85 } L ;ti 80 I Type 1124-h r 75= + - 100-Year Rainfall=8.88" 70- 65 ' Runoff Area=17.530 ac 60 ---- -� Runoff Volume=239,827 cf 50 ! �_ _ ( _ 1-1` Runoff Depth>3.77" 45 — t ---�- Flow Length=655' L.7°_ 40_ Tc=19.3 min 35 I —I— 30- CN=61 25 20- 15 I 10 -r- 5- 5 -5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) LordByrd Type 1124-hr 100-Year Rainfall=8.88" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 5S: Post-Development Total Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 5.00 0.56 0.00 0.00 18.50 8.26 3.64 2.11 5.25 0.60 0.00 0.00 18.75 8.29 3.67 2.04 5.50 0.63 0.00 0.00 19.00 8.33 3.70 1.97 5.75 0.67 0.00 0.00 19.25 8.36 3.72 1.90 6.00 0.71 0.00 0.00 19.50 8.39 3.75 1.82 6.25 0.75 0.00 0.00 19.75 8.42 3.77 1.75 6.50 0.79 0.00 0.00 20.00 8.45 3.79 1.68 6.75 0.84 0.00 0.00 7.00 0.88 0.00 0.00 7.25 0.92 0.00 0.00 7.50 0.97 0.00 0.00 7.75 1.02 0.00 0.00 8.00 1.07 0.00 0.00 8.25 1.12 0.00 0.00 8.50 1.17 0.00 0.00 8.75 1.24 0.00 0.00 9.00 1.31 0.00 0.00 9.25 1.38 0.00 0.04 9.50 1.45 0.00 0.13 9.75 1.52 0.01 0.24 10.00 1.61 0.02 0.38 10.25 1.70 0.03 0.57 10.50 1.81 0.04 0.82 10.75 1.94 0.06 1.16 11.00 2.09 0.09 1.65 11.25 2.27 0.13 2.34 11.50 2.51 0.20 3.57 11.75 3.44 0.54 9.03 12.00 5.89 1.93 54.64 12.25 6.27 2.19 58.59 12.50 6.53 2.37 22.09 12.75 6.71 2.49 12.09 13.00 6.86 2.60 8.71 13.25 6.98 2.69 7.21 13.50 7.10 2.77 6.28 13.75 7.19 2.84 5.53 14.00 7.28 2.91 4.93 14.25 7.36 2.97 4.41 14.50 7.44 3.02 4.13 14.75 7.51 3.08 3.93 15.00 7.58 3.13 3.74 15.25 7.64 3.18 3.55 15.50 7.70 3.22 3.36 15.75 7.76 3.26 3.16 16.00 7.81 3.30 2.97 16.25 7.86 3.34 2.78 16.50 7.91 3.38 2.68 16.75 7.96 3.42 2.61 17.00 8.01 3.45 2.54 17.25 8.05 3.48 2.47 17.50 8.10 3.52 2.40 17.75 8.14 3.55 2.33 18.00 8.18 3.58 2.26 18.25 8.22 3.61 2.19 LordByrd Type 1124-hr 100-Year Rainfall=8.88" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Summary for Pond 3P: BF-A Inflow Area= 34,848 sf, 21.25% Impervious, Inflow Depth > 4.73" for 100-Year event Inflow = 7.28 cfs @ 11.96 hrs, Volume= 13,743 cf Outflow = 5.45 cfs @ 12.01 hrs, Volume= 12,544 cf, Atten= 25%, Lag= 3.5 min Primary = 5.45 cfs @ 12.01 hrs, Volume= 12,544 cf Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 545.85' @ 12.01 hrs Surf.Area= 2,041 sf Storage= 2,589 cf Plug-Flow detention time= 47.2 min calculated for 12,544 cf(91% of inflow) Center-of-Mass det. time= 16.9 min (795.5- 778.6) Volume Invert Avail.Storage Storage Description #1 542.50' 5,489 cf Custom Stage Data(Prismatic) Listed below(Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) (%) (cubic-feet) (cubic-feet) 542.50 915 0.0 0 0 543.50 915 40.0 366 366 544.50 915 25.0 229 595 547.00 3,000 100.0 4,894 5,489 Device Routing Invert Outlet Devices #1 Primary 541.75' 12.0" Round Culvert L= 180.9' CPP, end-section conforming to fill, Ke= 0.500 Inlet/Outlet Invert= 541.75'/539.80' S= 0.0108 'P Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 0.79 sf #2 Device 1 545.00' 15.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=5.39 cfs @ 12.01 hrs HW=545.83' (Free Discharge) t-1=Culvert (Passes 5.39 cfs of 6.41 cfs potential flow) t-2=Orifice/Grate (Orifice Controls 5.39 cfs @ 4.39 fps) LordByrd Type 1124-hr 100-Year Rainfall=8.88" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Pond 3P: BF-A H yd rog ra ph 7/ Inflow 8 7.28 cfs 0 Primary - I —'Inflow Area=34,848 sf 7-.' �,_ 6"V - - Peak EIev=545.85' _5.45 cfs Storage=2,589 cf__ 5Z , .$ 41/ LL �% I I 3 I4. i 1 2 : / ,r 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 3P: BF-A / Stage-Discharge 547J U Primary 546 Aeriee —7-7.--- --Z— Orifice/Grate c 545 _, w F 544 I 1 543 0 1 2 3 4 5 6 7 Discharge (cis) LordByrd Type 1124-hr 100-Year Rainfall=8.88" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Pond 3P: BF-A Stage-Area-Storage aceJHorizontaIIWetted Area(sq-ft) 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200 2,400 2,600 2,800 3,000 ❑Surface` 0 / Storage 547 i I *°i /.i�� — I I ." 546— I4.,,, / /rte i dam- � � � / IIII — 545- 11 I I I W ' 544 1 i I ii 1 II 1 , ; r ; � Il 543- ■! 0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000 Storage(cubic-feet) LordByrd Type 1124-hr 100-Year Rainfall=8.88" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Hydrograph for Pond 3P: BF-A Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) 5.00 0.00 0 542.50 0.00 5.50 0.00 0 542.50 0.00 6.00 0.00 0 542.50 0.00 6.50 0.00 0 542.50 0.00 7.00 0.00 0 542.50 0.00 7.50 0.00 2 542.51 0.00 8.00 0.01 14 542.54 0.00 8.50 0.02 41 542.61 0.00 9.00 0.03 88 542.74 0.00 9.50 0.05 161 542.94 0.00 10.00 0.07 261 543.21 0.00 10.50 0.11 417 543.72 0.00 11.00 0.18 671 544.58 0.00 11.50 0.36 1,136 544.98 0.00 12.00 6.31 2,575 545.84 5.42 12.50 0.60 1,350 545.14 0.67 13.00 0.38 1,291 545.10 0.40 13.50 0.29 1,267 545.08 0.30 14.00 0.23 1,251 545.07 0.24 14.50 0.20 1,243 545.06 0.21 15.00 0.18 1,236 545.06 0.19 15.50 0.16 1,229 545.05 0.17 16.00 0.14 1,222 545.05 0.15 16.50 0.13 1,218 545.05 0.13 17.00 0.13 1,215 545.04 0.13 17.50 0.12 1,213 545.04 0.12 18.00 0.11 1,210 545.04 0.11 18.50 0.10 1,207 545.04 0.11 19.00 0.10 1,205 545.04 0.10 19.50 0.09 1,202 545.03 0.09 20.00 0.08 1,200 545.03 0.08 LordByrd Type 1124-hr 100-Year Rainfall=8.88" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Stage-Discharge for Pond 3P: BF-A Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) 542.50 0.00 545.20 1.15 542.55 0.00 545.25 1.61 542.60 0.00 545.30 2.11 542.65 0.00 545.35 2.66 542.70 0.00 545.40 3.25 542.75 0.00 545.45 3.88 542.80 0.00 545.50 4.18 542.85 0.00 545.55 4.38 542.90 0.00 545.60 4.58 542.95 0.00 545.65 4.76 543.00 0.00 545.70 4.94 543.05 0.00 545.75 5.12 543.10 0.00 545.80 5.29 543.15 0.00 545.85 5.45 543.20 0.00 545.90 5.61 543.25 0.00 545.95 5.76 543.30 0.00 546.00 5.91 543.35 0.00 546.05 6.05 543.40 0.00 546.10 6.20 543.45 0.00 546.15 6.34 543.50 0.00 546.20 6.47 543.55 0.00 546.25 6.61 543.60 0.00 546.30 6.70 543.65 0.00 546.35 6.73 543.70 0.00 546.40 6.77 543.75 0.00 546.45 6.80 543.80 0.00 546.50 6.83 543.85 0.00 546.55 6.86 543.90 0.00 546.60 6.88 543.95 0.00 546.65 6.91 544.00 0.00 546.70 6.94 544.05 0.00 546.75 6.97 544.10 0.00 546.80 7.00 544.15 0.00 546.85 7.03 544.20 0.00 546.90 7.06 544.25 0.00 546.95 7.09 544.30 0.00 547.00 7.12 544.35 0.00 544.40 0.00 544.45 0.00 544.50 0.00 544.55 0.00 544.60 0.00 544.65 0.00 544.70 0.00 544.75 0.00 544.80 0.00 544.85 0.00 544.90 0.00 544.95 0.00 545.00 0.00 545.05 0.14 545.10 0.41 545.15 0.75 LordByrd Type 1124-hr 100-Year Rainfall=8.88" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 3P: BF-A Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 542.50 915 0 545.20 1,499 1,440 542.55 915 18 545.25 1,541 1,516 542.60 915 37 545.30 1,582 1,594 542.65 915 55 545.35 1,624 1,674 542.70 915 73 545.40 1,666 1,756 542.75 915 92 545.45 1,707 1,840 542.80 915 110 545.50 1,749 1,927 542.85 915 128 545.55 1,791 2,015 542.90 915 146 545.60 1,832 2,106 542.95 915 165 545.65 1,874 2,198 543.00 915 183 545.70 1,916 2,293 543.05 915 201 545.75 1,958 2,390 543.10 915 220 545.80 1,999 2,489 543.15 915 238 545.85 2,041 2,590 543.20 915 256 545.90 2,083 2,693 543.25 915 275 545.95 2,124 2,798 543.30 915 293 546.00 2,166 2,906 543.35 915 311 546.05 2,208 3,015 543.40 915 329 546.10 2,249 3,126 543.45 915 348 546.15 2,291 3,240 543.50 915 366 546.20 2,333 3,355 543.55 915 377 546.25 2,375 3,473 543.60 915 389 546.30 2,416 3,593 543.65 915 400 546.35 2,458 3,715 543.70 915 412 546.40 2,500 3,839 543.75 915 423 546.45 2,541 3,965 543.80 915 435 546.50 2,583 4,093 543.85 915 446 546.55 2,625 4,223 543.90 915 457 546.60 2,666 4,355 543.95 915 469 546.65 2,708 4,490 544.00 915 480 546.70 2,750 4,626 544.05 915 492 546.75 2,792 4,765 544.10 915 503 546.80 2,833 4,905 544.15 915 515 546.85 2,875 5,048 544.20 915 526 546.90 2,917 5,193 544.25 915 538 546.95 2,958 5,340 544.30 915 549 547.00 3,000 5,489 544.35 915 560 544.40 915 572 544.45 915 583 544.50 915 595 544.55 957 642 544.60 998 690 544.65 1,040 741 544.70 1,082 794 544.75 1,124 850 544.80 1,165 907 544.85 1,207 966 544.90 1,249 1,027 544.95 1,290 1,091 545.00 1,332 1,157 545.05 1,374 1,224 545.10 1,415 1,294 545.15 1,457 1,366 Lord Byrd Type 1124-hr 100-Year Rainfall=8.88" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Summary for Link 6L: Post Dev. Combined Inflow Area = 763,607 sf, 2.40% Impervious, Inflow Depth > 3.79" for 100-Year event Inflow = 79.89 cfs @ 12.12 hrs, Volume= 241,372 cf Primary = 79.89 cfs @ 12.12 hrs, Volume= 241,372 cf, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 6L: Post Dev. Combined Hyd rog ra ph / i1 179.89 cfs — "'Primary $o -- -t.—_-_ 79 89 cfsInflow Area=763,607 sf 75- i + - 70 I � I � -I i -- H___. - 1- - ! 60: _ i .1 I I 55-• ' - . I--- ! -- i 'w 50- 1 i I I 6 ->- -. j 7 t - 7 j 35 II . -._. 1 x. I - j 30 .' 1 — 2s= } i i r i--. zo r i r � rt 1 i 1 A 1 10 014101 .1 ._ZZ':/; %1Z':/1 Z'../ . ' -'4'4P4 .r.�,-0111.6k4f, 1~,e.#4.: 5 6 10 11 12 13 14 15 16 17 18 19 20 Time (hours) LordByrd Type 1124-hr 100-Year Rainfall=8.88" Prepared by TIMMONS GROUP Printed 3/28/2017 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Hydrograph for Link 6L: Post Dev. Combined Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 5.00 0.00 0.00 0.00 18.50 2.13 0.00 2.13 5.25 0.00 0.00 0.00 18.75 2.05 0.00 2.05 5.50 0.00 0.00 0.00 19.00 1.98 0.00 1.98 5.75 0.00 0.00 0.00 19.25 1.91 0.00 1.91 6.00 0.00 0.00 0.00 19.50 1.83 0.00 1.83 6.25 0.00 0.00 0.00 19.75 1.76 0.00 1.76 6.50 0.00 0.00 0.00 20.00 1.68 0.00 1.68 6.75 0.00 0.00 0.00 7.00 0.00 0.00 0.00 7.25 0.00 0.00 0.00 7.50 0.00 0.00 0.00 7.75 0.00 0.00 0.00 8.00 0.00 0.00 0.00 8.25 0.00 0.00 0.00 8.50 0.00 0.00 0.00 8.75 0.00 0.00 0.00 9.00 0.00 0.00 0.00 9.25 0.03 0.00 0.03 9.50 0.12 0.00 0.12 9.75 0.22 0.00 0.22 10.00 0.36 0.00 0.36 10.25 0.54 0.00 0.54 10.50 0.78 0.00 0.78 10.75 1.10 0.00 1.10 11.00 1.55 0.00 1.55 11.25 2.21 0.00 2.21 11.50 3.36 0.00 3.36 11.75 9.83 0.00 9.83 12.00 55.27 0.00 55.27 12.25 58.55 0.00 58.55 12.50 22.53 0.00 22.53 12.75 12.32 0.00 12.32 13.00 8.83 0.00 8.83 13.25 7.27 0.00 7.27 13.50 6.32 0.00 6.32 13.75 5.57 0.00 5.57 14.00 4.96 0.00 4.96 14.25 4.45 0.00 4.45 14.50 4.16 0.00 4.16 14.75 3.96 0.00 3.96 15.00 3.77 0.00 3.77 15.25 3.57 0.00 3.57 15.50 3.38 0.00 3.38 15.75 3.18 0.00 3.18 16.00 2.98 0.00 2.98 16.25 2.80 0.00 2.80 16.50 2.69 0.00 2.69 16.75 2.62 0.00 2.62 17.00 2.55 0.00 2.55 17.25 2.48 0.00 2.48 17.50 2.41 0.00 2.41 17.75 2.34 0.00 2.34 18.00 2.27 0.00 2.27 18.25 2.20 0.00 2.20