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HomeMy WebLinkAboutWPO201900066 Calculations 2020-05-07BEAVER CREED MEDICAL OFFICE BUILDING COUNTY OF ALBEMARLE9 VIRGINIA DESIGN CALCULATIONS & NARRATIVE NOVEMBER 25, 2019 REVISED: APRIL 21, 2020 TIMMONS GROUP YOUR VISION ACHIEVED THROUGH OURS. Prepared by: Craig Kotarski, PE Timmons Group 608 Preston Ave, Suite 200 Charlottesville, VA 22903 434.327.1688 0 U CRATG W J. KarARSKI Lie. No. 0402048507 Leo 4121120 ,,�r-, APPROVED by the Albemarle County Community Development Department Date 5/7/20 File - - 1900066 Table of Contents Section Title Project Narrative 2 LD 229 — Storm Sewer Design Computations LD 204 — Storm Inlet Design Computations 4 L❑ 347 — Hydraulic Grade Line Computations 5 Virginia Runoff Reduction Method Worksheet Summary 6 Pre -Developed HyrdoCAD Calculations 7 Post -Developed HydroCAD Calculations Project Narrative: This project includes the demolition of two existing buildings, followed by the construction of a new medical office building with underground parking, a surface parking lot, and associated utility and site work, The limits of clearing and grading totals 1.51 acres. Stormwater Management: Water Quality: In the pre -developed condition, there exists 1.03 acres of impervious cover and 0.48 acres of managed turf. In the proposed condition, there will be 1.24 acres of impervious cover and 0.27 acres of managed turf. Per the Virginia Runoff Reduction Spreadsheet, this will require that 0.85 lbs. of phosphorus be removed per year. Nutrient credits will be purchased to meet stormwater quality requirements. Water Quantity In existing condition, about half of the site drains towards existing inlets/storm pipes adjacent to the southern property line, while the other half drains to Ivy Road. In the proposed condition, these drainage patterns will be maintained to the largest extent practical. 600 LF of 36" CMP detention pipe is being installed to meet water quantity requirements. The pipe reduces the 1-year, 24-hour storm to meet the requirements of the energy balance equation. Additionally, the 10-year, 24-hour storm is being detained to less than the pre -developed 10-year, 24 hour storm to meet flood protection requirements. C O O j O C 0 n m m 9 r n nf m c n n] $ T [ -'mm H l 7 7 c S a a a 4.. 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O R W iA G 0 N N O y VI O — � � 9 w A o l a 9 O In W cu a I 9 O � ro � a c n � T 3 L C P q N v 10 � D a m' 3 ro 3 r T] = O to 6 IL 0 W 0 N A = p C m L N N 3 9 2 � ƒ � � ( � J < � g } ( ( �}2} 41 9 ) b i J i \ g i � i ( i \ , 2 a m g 2 , / | » 2 2 ` ° \ 2 e e° g 8`°\ 2 9 C AW N�44P� V 4�R�*+A eN.i r�i. m �4m¢ Y 4+ Sh A W n»erG�Y Gt [.no- AwN�� N mmv�w�i��vli� 3 ❑ d� m' v 8 ❑ m O5,9 �'8ds v _'. 0�'o3.es�� gyp_p - a s ? a m 4.. m N �2 m a v N 6 s 3 0is 2S 3S Pre -1 to POA1 Pre -2 to POA2 Pre -3 to POA3 /Subcat, RSaC#1 Routing Diagram for Pre Prepared by Timmons Group, Printed 2/4l2D20 HydroCAD® 10.00-20 sln 06538 O 2017 HydroCAD Software Solutions LLC Pre Prepared by Timmons Group Printed 21412020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (subcatch meet-n umbers) 0.480 80 >75% Grass cover, Good, HSG D (1S, 2S, 3S) 1.030 98 Paved parking, HSG D (1S, 2S, 3S) 1.510 92 TOTAL AREA Pre Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.000 HSG B 0.000 HSG C 1.510 HSG D 1S, 2S, 3S 0A00 Other 1.510 TOTAL AREA Pre Prepared by Timmons Group HydroCAD® 10.00-20 sln O6538 © 2017 HydroCAD Software Solutions LLC Printed 2/4/2020 Page 4 Ground Covers (all nodes) HSG-A HSG-B MSG-C HSG-❑ Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.000 0.000 0.480 0.000 0.480 >75% Grass cover, Good 1 S, 2S, 3S 0.000 0.000 0.000 1.030 0.000 1.030 Paved parking 1 S, 2S, 3S 0.000 0.000 0.000 1.510 0.000 1.510 TOTAL AREA Pre Type I! 24-hr 7 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 5 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Star -Ind method Subcatchment1 S: Pre -1 to PQA1 Runoff Area=0.580 ac 67.24% Impervious Runoff Depth>2.20" Tc=6.0 min CN=92 Runoff=2.10 cfs 0.106 of Subcatchment2S: Pre -2 to PQA2 Runoff Area=0.330 ac 27.27% Impervious Runoff Depth>1.62" Flow Length=157' Slope=0.0600 7' Tc=7.5 min CN=85 Runoff=0.89 cfs 0.045 of Subcatchment3S: Pre -3 to POA3 Runoff Area=0.600 ac 91.67% impervious Runoff Depth>2.70" Tc=6.0 min CN=97 Runoff=2.47 cfs 0.135 of Total Runoff Area = 1.510 ac Runoff Volume = 0.285 of Average Runoff Depth = 2.27" 31.79% Pervious = 0.480 ac 68.21% Impervious = 1.030 ac Pre Type 1124-hr 7 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 6 Summary for Subcatchment 1S: Pre -1 to PQA1 Runoff = 2.10 cfs @ 11.97 hrs, Volume= 0.106 af, ❑epth> 2.20" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1 YR Rainfall=3.04" Area (ac) CN Description 0.190 80 >75% Grass cover, Good, HSG D 0.390 98 Paved parking, HSG ❑ 0.580 92 Weighted Average 0.190 32.76% Pervious Area 0.390 67.24% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ftlsec) (cfs) 6.0 Direct Entry, Subcatchment IS: Pre -1 to POA1 Hydrograph ❑ Runoff 2 Type 11 24-hr 1 YR Rainfall=3.04" Runoff Area=0.580 ac Runoff Volume=0.106 of Runoff Depth>2.20" Tc=6.0 min LL , I fl A lsllY� 0 1 2 3 4 5 5 7 8 9 10 11 12 13 14 1s 1B 17 18 19 20 21 22 23 24 Time (hours) Pre Type I! 24-hr 7 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Page 7 Hydrograph for Subcatchment 1 S: Pre -1 to POA1 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.02 0.00 0.00 1.00 0.03 0.00 0A0 1.25 0.04 0.00 0.00 1,50 0.05 0.00 0.00 1.75 0.06 0.00 0.00 2.00 0.07 0.00 0.00 2.25 0.08 0.00 0.00 2.50 0.09 0.00 0.00 2.75 0.10 0.00 0.00 3.00 0.10 0.00 0.00 3.25 0.11 0.00 0.00 3.50 0.13 0.00 0.00 3.75 0.14 0.00 0.00 4.00 0.15 0.00 0.00 4.25 0.16 0.00 0.00 4.50 0.17 0.00 0.00 4.75 0.18 0.00 0.00 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.01 0.00 6.25 0.26 0.01 0.01 6.50 0.27 0.01 0.01 6.75 0.29 0.01 0.01 7.00 0.30 0.02 0.01 7.25 0.32 0.02 0.01 7.50 0.33 0.02 0.01 7.75 0.35 0.03 0.01 8.00 0.36 0.03 0.01 8.25 0.38 0.04 0.01 8.50 0.40 0.05 0.02 8.75 0.42 0.06 0.02 9.00 0.45 0.07 0.02 9.25 0.47 0.08 0.02 9.50 0.50 0.09 0.03 9.75 0.52 0.10 0.03 10.00 0.55 0.11 0.03 10.25 0.58 0.13 0.04 10.50 0.62 0.15 0.05 10.75 0.66 0.18 0.06 11.00 0.71 0.21 0.07 11.25 0.78 0.25 0.10 11.50 0.86 0.30 0.13 11.75 1.18 0.54 0.65 12.00 2.02 1.25 1.97 12.25 2.15 1.37 0.27 12.50 2.23 1.45 0.17 12.75 2.30 1.50 0.13 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.35 1.65 0.11 13.25 2.39 1.59 0A9 13.50 2.43 1.63 0.08 13,75 2,46 1.66 0.07 14.00 2.49 1.69 0.06 14.25 2.52 1.71 0.06 14.50 2.55 1.74 0.06 14.75 2.57 1.76 0.05 15.00 2.59 1.78 0.05 15.25 2.62 1.80 0.05 15.50 2.64 1.82 0.04 15.75 2.66 1.84 0.04 16.00 2.68 1.86 0.04 16.25 2.69 1.87 0.04 16.50 2.71 1.89 0.04 16.75 2.73 1.90 0.04 17.00 2.74 1.92 0.03 17.25 2.76 1.93 0.03 17.50 2.77 1.95 0.03 17.75 2.79 1.96 0A3 18.00 2.80 1.97 0.03 18.25 2.81 1.99 0.03 18.50 2.83 2.00 0.03 18.75 2.84 2.01 0.03 19.00 2.85 2.02 0.03 19.25 2.86 2.03 0.03 19.50 2.87 2.04 0.02 19.75 2.88 2.05 0.02 20.00 2.89 2.06 0.02 20.25 2.90 2.07 0.02 20.50 2.91 2.08 0.02 20.75 2.92 2.09 0.02 21.00 2.93 2.10 0.02 21.25 2.94 2.11 0.02 21.50 2.95 2.12 0.02 21,75 2.96 2.12 0.02 22.00 2.97 2.13 0.02 22.25 2.98 2.14 0.02 22.50 2.99 2.15 0.02 22.75 3.00 2.16 0.02 23.00 3.01 2.17 0.02 23.25 3.01 2.17 0.02 23.50 3.02 2.18 0.02 23.75 3.03 2.19 0.02 24.00 3.04 2.20 0A2 Pre Type 1124-hr 7 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 8 Summary for Subcatchment 2S: Pre -2 to PQA2 Runoff = 0.89 cfs @ 11.99 hrs, Volume= 0.045 af, ❑epth> 1.62" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1 YR Rainfall=3.04" Area (ac) CN Description 0.240 80 >75% Grass cover, Good, HSG D 0.090 98 Paved parking, HSG ❑ 0.330 85 Weighted Average 0.240 72.73% Pervious Area 0.090 27.27% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ft/sec) (cfs) 7.3 132 0.0600 0.30 Sheet Flow, Grass: Short n= 0.150 P2= 3.70" 0.2 25 0.0600 1.74 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.70" 7.5 157 Total Subcatchment 2S: Pre -2 to POA2 Hydrograph D.sS 0.9. I 1_ 1 I 1 o.s5 I 1 08 _ 1 _ I_ _I _ I_ 1 _ I_ _I _ 0 75 : 1 I I_ _1 _ I_ _ _ 07 0.65 0.6 4 0.55 0.5 71 ° 0.45 0.4 0.35. 1 _I_ _I_ 0.3 1 _ I_ _I _ I_ 0.25 _ _ I_ 1 _1 _ L J _ I_ 1 _I _ L D-2 1 _ I_ 1 _1 _ I_ 1 _ I_ 1 _1 _ 1 0.15 I 1 1 L J 1 1 1 L 0.1. 1 _' L _1_ L J_ L 1 I I Type II 24-hr 1 YR Rainfall=3.04" Runoff Area=0.330 ac i I Runoff Vol u me=0.045 of -Runoff Depth>1.62 Flow Length=157' Slope=0.0600 T Tc=7.5 min CN=85 0 .. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 TIrne (hours) p Runoff Pre Type I! 24-hr 7 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Page 9 Hydrograph for Subcatchment 2S: Pre -2 to POA2 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.02 0.00 0.00 1.00 0.03 0.00 0A0 1.25 0.04 0.00 0.00 1,50 0.05 0.00 0.00 1.75 0.06 0.00 0.00 2.00 0.07 0.00 0.00 2.25 0.08 0.00 0.00 2.50 0.09 0.00 0.00 2.75 0.10 0.00 0.00 3.00 0.10 0.00 0.00 3.25 0.11 0.00 0.00 3.50 0.13 0.00 0.00 3.75 0.14 0.00 0.00 4.00 0.15 0.00 0.00 4.25 0.16 0.00 0.00 4.50 0.17 0.00 0.00 4.75 0.18 0.00 0.00 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.36 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.01 0.00 9.50 0.50 0.01 0.00 9.75 0.52 0.01 0.01 10.00 0.55 0.02 0.01 10.25 0.58 0.03 0.01 10.50 0.62 0.04 0.01 10.75 0.66 0.05 0.02 11.00 0.71 0.06 0.02 11.25 0.78 0.08 0.03 11.50 0.86 0.11 0.04 11.75 1.18 0.26 0.21 12.00 2.02 0.81 0.88 12.25 2.15 0.90 0.14 12.50 2.23 0.97 0.09 12.75 2.30 1.02 0.06 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.35 1.06 0.05 13.25 2.39 1.09 0.05 13.50 2.43 1.12 0.04 13,75 2,46 1.15 0.04 14.00 2.49 1.17 0.03 14.25 2.52 1.19 0.03 14.50 2.55 1.22 0.03 14.75 2.57 1.24 0.03 15.00 2.59 1.25 0.03 15.25 2.62 1.27 0.02 15.50 2.64 1.29 0.02 15.75 2.66 1.30 0.02 16.00 2.68 1.32 0.02 16.25 2.69 1.33 0.02 16.50 2.71 1.35 0.02 16.75 2.73 1.36 0.02 17.00 2.74 1.37 0.02 17.25 2.76 1.39 0.02 17.50 2.77 1.40 0.02 17.75 2.79 1.41 0.02 18.00 2.80 1.42 0.02 18.25 2.81 1.43 0.01 18.50 2.83 1.44 0.01 18.75 2.84 1.45 0.01 19.00 2.85 1.46 0.01 19.25 2.86 1.47 0.01 19.50 2.87 1.48 0.01 19.75 2.88 1.49 0.01 20.00 2.89 1.50 0.01 20.25 2.90 1.51 0.01 20.50 2.91 1.52 0.01 20.75 2.92 1.52 0.01 21.00 2.93 1.53 0.01 21.25 2.94 1.54 0.01 21.50 2.95 1.55 0.01 21,75 2.96 1.56 0.01 22.00 2.97 1.56 0.01 22.25 2.98 1.57 0.01 22.50 2.99 1.58 0.01 22.75 3.00 1.59 0.01 23.00 3.01 1.59 0,01 23.25 3.01 1.60 0.01 23.50 3.02 1.61 0.01 23.75 3.03 1.61 0.01 24.00 3.04 1.62 0,01 Pre Type 1124-hr 7 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Pape 10 Summary for Subcatchment 3S: Pre -3 to PQA3 Runoff = 2.47 cfs @ 11.96 hrs, Volume= 0.135 af, ❑epth> 2.70" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1 YR Rainfall=3.04" Area (ac) CN Description 0.050 80 >75% Grass cover, Good, HSG D 0.550 98 Paved parking, HSG ❑ 0.600 97 Weighted Average 0.050 8.33% Pervious Area 0.550 91.67% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ftlsec) (cfs) 6.0 Direct Entry, Subcatchment 3S: Pre -3 to POA3 Hydrograph ❑ Runpff Type II 24-hr 1 YR Rainfall=3.04" Runoff Area=0.000 ac Runoff Volume=0.135 of Runoff Depth>2.70" 0 LL Tc=6.0 mite 11 1 11 1 CN=97 0 .. . . .. . 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Pre Type I! 24-hr 7 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Pape 11 Hydrograph for Subcatchment 3S: Pre -3 to POA3 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.02 0.00 0.00 1.00 0.03 0.00 0A0 1.25 0.04 0.00 0.00 1,50 0.05 0.00 0.00 1.75 0.06 0.00 0.00 2.00 0.07 0.00 0.00 2.25 0.08 0.00 0.00 2.50 0.09 0.00 0.00 2.75 0.10 0.00 0.00 3.00 0.10 0.01 0.01 3.25 0.11 0.01 0.01 3.50 0.13 0.01 0.01 3.75 0.14 0.01 0.01 4.00 0.15 0.02 0.01 4.25 0.16 0.02 0.01 4.50 0.17 0.03 0.01 4.75 0.18 0.03 0.01 5.00 0.19 0.04 0.01 5.25 0.20 0.04 0.02 5.50 0.22 0.05 0.02 5.75 0.23 0.06 0.02 6.00 0.24 0.07 0.02 6.25 0.26 0.08 0.02 6.50 0.27 0.08 0.02 6.75 0.29 0.09 0.02 7.00 0.30 0.10 0.02 7.25 0.32 0.11 0.03 7.50 0.33 0.13 0.03 7.75 0.35 0.14 0.03 8.00 0.36 0.15 0.03 8.25 0.38 0.16 0.03 8.50 0.40 0.18 0.04 8.75 0.42 0.19 0.04 9.00 0.45 0.21 0.05 9.25 0.47 0.23 0.05 9.50 0.50 0,25 0.05 9.75 0.52 0.27 0.05 10.00 0.55 0.30 0.06 10.25 0.58 0.33 0.07 10.50 0.62 0.36 0.08 10.75 0.66 0.40 0.09 11.00 0.71 0.44 0.11 11.25 0.78 0.50 0.14 11.50 0.86 0.58 0.19 11.75 1.18 0.87 0.85 12.00 2.02 1.69 2.28 12.25 2.15 1.82 0.30 12.50 2.23 1.90 0.20 12.75 2.30 1.96 0.14 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.35 2.01 0.12 13.25 2.39 2.06 0.10 13.50 2.43 2.09 0.09 13,75 2,46 2.13 0.08 14.00 2.49 2.16 0.07 14.25 2.52 2.18 0.07 14.50 2.55 2.21 0.06 14.75 2.57 2.23 0,06 15.00 2.59 2.26 0.06 15.25 2.62 2.28 0.05 15.50 2.64 2.30 0.05 15.75 2.66 2.32 0.05 16.00 2.68 2.34 0.04 16.25 2.69 2.35 0.04 16.50 2.71 2.37 0.04 16.75 2.73 2.39 0.04 17.00 2.74 2.40 0.04 17.25 2.76 2.42 0.04 17.50 2.77 2.43 0.04 17.75 2.79 2.45 0A3 18.00 2.80 2.46 0.03 18.25 2.81 2.47 0.03 18.50 2.83 2.49 0.03 18.75 2.84 2.50 0.03 19.00 2.85 2.51 0.03 19.25 2.86 2.52 0.03 19.50 2.87 2.53 0.03 19.75 2.88 2.54 0.03 20.00 2.89 2.55 0.02 20.25 2.90 2.56 0.02 20.50 2.91 2.57 0.02 20.75 2.92 2.58 0.02 21.00 2.93 2.59 0.02 21.25 2.94 2.60 0.02 21.50 2.95 2.61 0.02 21,75 2.96 2.62 0.02 22.00 2.97 2.63 0.02 22.25 2.98 2.64 0.02 22.50 2.99 2.65 0.02 22.75 3.00 2.66 0.02 23.00 3.01 2.66 0.02 23.25 3.01 2.67 0.02 23.50 3.02 2.68 0.02 23.75 3.03 2.69 0.02 24.00 3.04 2.70 0A2 Pre Type I! 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Pape 12 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Star -Ind method Subcatchment1 S: Pre -1 to PQA1 Runoff Area=0.580 ac 67.24% Impervious Runoff Depth>2.81" Tc=6.0 min CN=92 Runoff=2.64 cfs 0.136 of Subcatchment2S: Pre -2 to PQA2 Runoff Area=0.330 ac 27.27% Impervious Runoff Depth>2.17" Flow Length=157' Slope=0.0600 7' Tc=7.5 min CN=85 Runoff=1.18 cfs 0.060 of Subcatchment3S: Pre -3 to POA3 Runoff Area=0.600 ac 91.67% impervious Runoff Depth>3.33" Tc=6.0 min CN=97 Runoff=3.01 cfs 0.167 of Total Runoff Area = 1.510 ac Runoff Volume = 0.362 of Average Runoff Depth = 2.88" 31.79% Pervious = 0.480 ac 68.21% Impervious = 1.030 ac Pre Type 1124-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 13 Summary for Subcatchment 1S: Pre -1 to PQA1 Runoff = 2.64 cfs @ 11.96 hrs, Volume= 0.136 af, ❑epth> 2.81" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 0.190 80 >75% Grass cover, Good, HSG D 0.390 98 Paved parking, HSG ❑ 0.580 92 Weighted Average 0.190 32.76% Pervious Area 0.390 67.24% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ft/sec) (cfs) 6.0 Direct Entry, N 3 0 LL 2 is pM 0 Subcatchment IS: Pre -1 to POA1 Hydrograph Type II 24-hr 2 YR Rainfall=3.68" Runoff Area=0.580 ac Runoff Volume=0.136 of Runoff Depth>2.81" Tc=6.0 min CN=92 1 2 3 4 5 G 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) p Runoff Pre Type I! 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Paae 14 Hydrograph for Subcatchment 1 S: Pre -1 to POA1 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0A0 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.00 2.75 0.12 0.00 0.00 3.00 0.13 0.00 0.00 3.25 0.14 0.00 0.00 3.50 0.15 0.00 0.00 3.75 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.25 0.19 0.00 0.00 4.50 0.20 0.00 0.00 4.75 0.22 0.00 0.00 5.00 0.23 0.00 0.00 5.25 0.25 0.01 0.00 5.50 0.26 0.01 0.01 5.75 0.28 0.01 0.01 6.00 0.29 0.01 0.01 6.25 0.31 0.02 0.01 6.50 0.33 0.02 0.01 6.75 0.35 0.03 0.01 7.00 0.36 0.03 0.01 7.25 0.38 0.04 0.01 7.50 0.40 0.05 0.02 7.75 0.42 0.05 0.02 8.00 0.44 0.06 0.02 8.25 0.46 0.07 0.02 8.50 0.49 0.08 0.03 8.75 0.51 0.09 0.03 9.00 0.54 0.11 0.03 9.25 0.57 0,12 0.04 9.50 0.60 0,14 0.04 9.75 0.63 0.16 0.04 10.00 0.67 0.18 0.05 10.25 0.71 0.20 0.06 10.50 0.75 0.23 0.07 10.75 0.80 0.26 0.08 11.00 0.86 0.31 0.10 11.25 0.94 0.36 0.13 11.50 1.04 0.43 0.18 11.75 1.42 0.74 0.85 12.00 2.44 1.64 2.47 12.25 2.60 1.78 0.34 12.50 2.70 1.88 0.22 12.75 2.78 1.95 0.16 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.84 2.01 0.13 13.25 2.89 2.06 0.11 13.50 2.94 2.10 0.10 13.75 2.98 2.14 0.09 14.00 3.02 2.18 0.08 14.25 3.05 2.21 0.07 14.50 3.08 2.24 0.07 14.75 3.11 2.27 0.07 15.00 3.14 2.29 0.06 15.25 3.17 2.32 0.06 15.50 3.19 2.34 0.06 15.75 3.22 2.37 0.05 16.00 3.24 2.39 0.05 16.25 3.26 2.41 0.05 16.50 3.28 2.43 0.05 16.75 3.30 2.45 0.04 17.00 3.32 2.46 0.04 17.25 3.34 2.48 0.04 17.50 3.36 2.50 0.04 17.75 3.37 2.51 0.04 18.00 3.39 2.53 0.04 18.25 3,41 2.55 0.04 18.50 3.42 2.56 0.03 18.75 3.44 2.58 0.03 19.00 3.45 2.59 0.03 19.25 3.46 2.60 0.03 19.50 3.48 2.62 0.03 19.75 3.49 2.63 0.03 20.00 3.50 2.64 0.03 20.25 3.52 2.65 0.03 20.50 3.53 2.66 0.03 20.75 3.54 2.67 0.03 21.00 3.55 2.68 0.03 21.25 3.56 2.70 0.03 21.50 3.57 2.71 0.03 21,75 3.58 2,72 0A3 22.00 3.60 2.73 0.02 22.25 3.61 2.74 0.02 22.50 3.62 2.75 0.02 22.75 3.63 2.76 0.02 23.00 3.64 2.77 0.02 23.25 3.65 2.78 0.02 23.50 3.66 2.79 0.02 23.75 3.67 2.80 0.02 24.00 3.68 2.81 0A2 Pre Type I! 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 15 Summary for Subcatchment 2S: Pre -2 to POA2 Runoff = 1.18 cfs @ 11.99 hrs, Volume= 0.060 af, Depths 2.17" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 0.240 80 >75% Grass cover, Good, HSG D 0.090 98 Paved parking, HSG ❑ 0.330 85 Weighted Average 0.240 72.73% Pervious Area 0.090 27.27% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ft/sec) (cfs) 7.3 132 0.0600 0.30 Sheet Flow, Grass: Short n= 0.150 P2= 3.70" 0.2 25 0.0600 1.74 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.70" 7.5 157 Total 0& 0 Subcatchment 2S: Pre -2 to POA2 Hydrograph Type II 24-hr 2 YR Rainfall=3.68" Runoff Area=0.330 ac Runoff Vol ume=0.060 of Runoff Depth>2.17" Flow Length=157' Slope=0.0600 '1' Tc=7.5 m i n CN=85 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) p Runoff Pre Type I! 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Pape 16 Hydrograph for Subcatchment 2S: Pre -2 to POA2 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0A0 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.00 2.75 0.12 0.00 0.00 3.00 0.13 0.00 0.00 3.25 0.14 0.00 0.00 3.50 0.15 0.00 0.00 3.75 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.25 0.19 0.00 0.00 4.50 0.20 0.00 0.00 4.75 0.22 0.00 0.00 5.00 0.23 0.00 0.00 5.25 0.25 0.00 0.00 5.50 0.26 0.00 0.00 5.75 0.28 0.00 0.00 6.00 0.29 0.00 0.00 6.25 0.31 0.00 0.00 6.50 0.33 0.00 0.00 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 0.01 0.00 8.50 0.49 0.01 0.00 8.75 0.51 0.01 0.01 9.00 0.54 0.02 0.01 9.25 0.57 0.02 0.01 9.50 0.60 0.03 0.01 9.75 0.63 0.04 0.01 10.00 0.67 0.05 0.01 10.25 0.71 0.06 0.02 10.50 0.75 0.07 0.02 10.75 0.80 0.09 0.02 11.00 0.86 0.12 0.03 11.25 0.94 0.15 0.04 11.50 1.04 0.19 0.06 11.75 1.42 0.40 0.30 12.00 2.44 1.13 1.17 12.25 2.60 1.26 0.18 12.50 2.70 1.34 0.11 12.75 2.78 1.40 0.08 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.84 1.46 0.07 13.25 2.89 1.50 0.06 13.50 2.94 1.54 0.05 13.75 2.98 1.57 0.05 14.00 3.02 1.60 0.04 14.25 3.05 1.63 0.04 14.50 3.08 1.66 0.04 14.75 3.11 1.68 0A3 15.00 3.14 1.71 0.03 15.25 3.17 1.73 0.03 15.50 3.19 1.75 0.03 15.75 3.22 1.77 0.03 16.00 3.24 1.79 0.02 16.25 3.26 1.81 0.02 16.50 3.28 1.83 0.02 16.75 3.30 1.84 0.02 17.00 3.32 1.86 0.02 17.25 3.34 1.88 0.02 17.50 3.36 1.89 0.02 17.75 3.37 1.91 0.02 18.00 3.39 1.92 0.02 18.25 3,41 1.93 0.02 18.50 3.42 1.95 0.02 18.75 3.44 1.96 0.02 19.00 3.45 1.97 0.02 19.25 3.46 1.99 0.02 19.50 3.48 2.00 0.02 19.75 3.49 2.01 0.01 20.00 3.50 2.02 0.01 20.25 3.52 2.03 0.01 20.50 3.53 2.04 0.01 20.75 3.54 2.05 0.01 21.00 3.55 2.06 0.01 21.25 3.56 2.07 0.01 21.50 3.57 2.08 0.01 21,75 3.58 2.09 0.01 22.00 3.60 2.10 0.01 22.25 3.61 2.11 0.01 22.50 3.62 2.12 0.01 22.75 3.63 2.13 0.01 23.00 3.64 2.14 0,01 23.25 3.65 2.15 0.01 23.50 3.66 2.16 0.01 23.75 3.67 2.17 0.01 24.00 3.68 2.17 0,01 Pre Type 1124-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 17 Summary for Subcatchment 3S: Pre -3 to PQA3 Runoff = 3.01 cfs @ 11.96 hrs, Volume= 0.167 af, ❑epth> 3.33" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 0.050 80 >75% Grass cover, Good, HSG D 0.550 98 Paved parking, HSG ❑ 0.600 97 Weighted Average 0.050 8.33% Pervious Area 0.550 91.67% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ftlsec) (cfs) 6.0 Direct Entry, Subcatchment 3S: Pre -3 to POA3 Hydrograph p Runoff 3 Type II 24-hr 2 YR Rainfall=3.68" Runoff Area=0.600 ac 2 Runoff Volume=0.167 of Runoff Depth>3.33" LL Tc=6.0 min CN=9M7 1 0 1 2 3 4 5 fi 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Pre Type I! 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Pape 18 Hydrograph for Subcatchment 3S: Pre -3 to POA3 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0A0 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.01 2.75 0.12 0.01 0.01 3.00 0.13 0.01 0.01 3.25 0.14 0.02 0.01 3.50 0.15 0.02 0.01 3.75 0.16 0.03 0.01 4.00 0.18 0.03 0.01 4.25 0.19 0.04 0.02 4.50 0.20 0.04 0.02 4.75 0.22 0.05 0.02 5.00 0.23 0.06 0.02 5.25 0.25 0.07 0.02 5.50 0.26 0.08 0.02 5.75 0.28 0.09 0.02 6.00 0.29 0.10 0.03 6.25 0.31 0.11 0.03 6.50 0.33 0.12 0.03 6.75 0.35 0.14 0.03 7.00 0.36 0.15 0.03 7.25 0.38 0.16 0.03 7.50 0.40 0.18 0.04 7.75 0.42 0.19 0.04 8.00 0.44 0.21 0.04 8.25 0.46 0.23 0.04 8.50 0.49 0.25 0.05 8.75 0.51 0.27 0.05 9.00 0.54 0.29 0.06 9.25 0.57 0,32 0.06 9.50 0.60 0.34 0.06 9.75 0.63 0.37 0.07 10.00 0.67 0.40 0.08 10.25 0.71 0.43 0.09 10.50 0.75 0.48 0.10 10.75 0.80 0.52 0.12 11.00 0.86 0.58 0.14 11.25 0.94 0.65 0.18 11.50 1.04 0.74 0.23 11.75 1.42 1.11 1.05 12.00 2.44 2.10 2.78 12.25 2.60 2.26 0.37 12.50 2.70 2.37 0.24 12.75 2.78 2.44 0.17 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.84 2.60 0.15 13.25 2.89 2.55 0.12 13.50 2.94 2.60 0.11 13.75 2.98 2.64 0.10 14.00 3.02 2.68 0.09 14.25 3.05 2.71 0.08 14.50 3.08 2.74 0.08 14.75 3.11 2.77 0A7 15.00 3.14 2.80 0.07 15.25 3.17 2.82 0.06 15.50 3.19 2.85 0.06 15.75 3.22 2.87 0.06 16.00 3.24 2.89 0.05 16.25 3.26 2.92 0.05 16.50 3.28 2.94 0.05 16.75 3.30 2.96 0.05 17.00 3.32 2.97 0.05 17.25 3.34 2.99 0.04 17.50 3.36 3.01 0.04 17.75 3.37 3.03 0.04 18.00 3.39 3.04 0.04 18.25 3,41 3.06 0.04 18.50 3.42 3.08 0.04 18.75 3.44 3.09 0.04 19.00 3.45 3.11 0.03 19.25 3.46 3.12 0.03 19.50 3.48 3.13 0.03 19.75 3.49 3.15 0.03 20.00 3.50 3.16 0.03 20.25 3.52 3.17 0.03 20.50 3.53 3.18 0.03 20.75 3.54 3.19 0.03 21.00 3.55 3.20 0.03 21.25 3.56 3.22 0.03 21.50 3.57 3.23 0.03 21,75 3.58 3.24 0.03 22.00 3.60 3.25 0.03 22.25 3.61 3.26 0.03 22.50 3.62 3.27 0.03 22.75 3.63 3.28 0.03 23.00 3.64 3.29 0A3 23.25 3.65 3.30 0.03 23.50 3.66 3.31 0.02 23.75 3.67 3.32 0.02 24.00 3.68 3.33 0A2 Pre Type it 24-hr 70 YR Rainfall=5.57" Prepared by Timmons Group Printed 2i412020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Pape 19 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Star -Ind method Subcatchment1 S: Pre -1 to PQA1 Runoff Area=0.580 ac 67.24% Impervious Runoff Depth>4.64" Tc=6.0 min CN=92 Runoff=4.23 cfs 0.224 of Subcatchment2S: Pre -2 to PQA2 Runoff Area=0.330 ac 27.27% Impervious Runoff Depth>3.89" Flow Length=157' Slope=0.0600 7' Tc=7.5 min CN=85 Runoff=2.06 cis 0.107 of Subcatchment3S: Pre -3 to POA3 Runoff Area=0.600 ac 91.67% impervious Runoff Depth>5.21" Tc=6.0 min CN=97 Runoff=4.61 cfs 0.261 of Total Runoff Area = 1.510 ac Runoff Volume = 0.592 of Average Runoff Depth = 4.70" 31.79% Pervious = 0.480 ac 68.21% Impervious = 1.030 ac Pre Type 11 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 20 Summary for Subcatchment 1S: Pre -1 to PQA1 Runoff = 4.23 cfs @ 11.96 hrs, Volume= 0.224 af, ❑epth> 4.64" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Description 0.190 80 >75% Grass cover, Good, HSG D 0.390 98 Paved parking, HSG ❑ 0.580 92 Weighted Average 0.190 32.76% Pervious Area 0.390 67.24% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ft/sec) (cfs) 6.0 Direct Entry, 4 3 LL2 Subcatchment IS: Pre -1 to POA1 Hydrograph Type 11 24-hr 10 YR Rainfall=5.57" Runoff Area=0.580 ac Runoff Volume=0.224 of Runoff Depth>4.64" Tc=6.0 mite CN=9M2 ------------------ ❑ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Pre Type it 24-hr 70 YR Rainfall=5.57" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Pape 21 Hydrograph for Subcatchment 1 S: Pre -1 to POA1 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0A0 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.00 0.00 2.00 0.12 0.00 0.00 2.25 0.14 0.00 0.00 2.50 0.16 0.00 0.00 2.75 0.17 0.00 0.00 3.00 0.19 0.00 0.00 3.25 0.21 0.00 0.00 3.50 0.23 0.00 0.00 3.75 0.25 0.01 0.01 4.00 0.27 0.01 0.01 4.25 0.29 0.01 0.01 4.50 0.31 0.02 0.01 4.75 0.33 0.02 0.01 5.00 0,35 0.03 0.02 5.25 0.37 0.04 0.02 5.50 0.40 0.05 0.02 5.75 0.42 0.05 0.02 6.00 0.45 0.06 0.02 6.25 0.47 0.08 0.03 6.50 0.50 0.09 0.03 6.75 0.52 0.10 0.03 7.00 0.55 0.11 0.03 7.25 0.58 0.13 0.03 7.50 0.61 0.14 0.04 7.75 0.64 0.16 0.04 8.00 0.67 0.18 0.04 8.25 0.70 0.20 0.05 8.50 0.74 0.22 0.05 8.75 0.78 0.25 0.06 9.00 0.82 0.27 0.07 9.25 0.86 0,30 0.07 9.50 0.91 0.34 0.07 9.75 0.96 0.37 0.08 10.00 1.01 0.41 0.09 10.25 1.07 0.45 0.11 10.50 1.14 0.51 0.12 10.75 1.22 0.57 0.15 11.00 1.31 0.64 0.18 11.25 1.43 0.74 0.23 11.50 1.58 0.87 0.31 11.75 2.16 1.38 1.42 12.00 3.69 2.82 3.93 12.25 3.93 3.05 0.53 12.50 4.09 3.21 0.34 12.75 4.21 3.32 0.25 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 4.30 3.41 0.21 13.25 4.38 3.49 0.18 13.50 4.45 3.55 0.16 13.75 4.51 3.61 OA4 14.00 4.57 3.67 OA 2 14.25 4.62 3.72 0.11 14.50 4.67 3.76 0.11 14.75 4.71 3.81 0.10 15.00 4.75 3.85 0.10 15.25 4.79 3.89 0.09 15.50 4.83 3.93 0.09 15.75 4.87 3.96 0.08 16.00 4.90 3.99 0.08 16.25 4.93 4.02 0.07 16.50 4.96 4.05 0.07 16.75 4.99 4.08 0.07 17.00 5.02 4.11 0.07 17.25 5.05 4.14 0.06 17.50 5.08 4.17 0.06 17.75 5.10 4.19 0A6 18.00 5.13 4.22 0.06 18.25 5.15 4.24 0.06 18.50 5.18 4.26 0.05 18.75 5.20 4.29 O,05 19.00 5.22 4.31 0.05 19.25 5.24 4.33 0.05 19.50 5.26 4.35 O.05 19.75 5.28 4.37 0.04 20.00 5.30 4.39 0.04 20.25 5.32 4.40 0.04 20.50 5.34 4.42 0.04 20.75 5.36 4.44 0.04 21.00 5.37 4.45 0.04 21.25 5.39 4.47 0.04 21.50 5.41 4.49 0.04 21,75 5.43 4.51 0.04 22.00 5.44 4.52 0.04 22.25 5,46 4.54 0.04 22.50 5.47 4.55 0.04 22.75 5.49 4.57 0.04 23.00 5.51 4.59 O,04 23.25 5.52 4.60 0.04 23.50 5.54 4.62 0.04 23.75 5.55 4.63 0.04 24.00 5.57 4.65 0.04 Pre Type it 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2i412020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 22 Summary for Subcatchment 2S: Pre -2 to POA2 Runoff = 2.06 cfs @ 11.99 hrs, Volume= 0.107 af, Depths 3.89" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Description 0.240 80 >75% Grass cover, Good, HSG D 0.090 98 Paved parking, HSG ❑ 0.330 85 Weighted Average 0.240 72.73% Pervious Area 0.090 27.27% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ft/sec) (cfs) 7.3 132 0.0600 0.30 Sheet Flow, Grass: Short n= 0.150 P2= 3.70" 0.2 25 0.0600 1.74 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.70" 7.5 157 Total Subcatchment 2S: Pre -2 to POA2 Hydrograph p Runoff Type II 24-hr 10 YR Rainfall=5.57" Runoff Area=0.330 ac I I ` Runoff Vol ume=0.107 of Ri innff Ilnnth>l R4" t Flow Length=157' Slope=0.0600 '/' Tc=7.5 min CN=85 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Pre Type it 24-hr 70 YR Rainfall=5.57" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Paae 23 Hydrograph for Subcatchment 2S: Pre -2 to POA2 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0A0 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.00 0.00 2.00 0.12 0.00 0.00 2.25 0.14 0.00 0.00 2.50 0.16 0.00 0.00 2.75 0.17 0.00 0.00 3.00 0.19 0.00 0.00 3.25 0.21 0.00 0.00 3.50 0.23 0.00 0.00 3.75 0.25 0.00 0.00 4.00 0.27 0.00 0.00 4.25 0.29 0.00 0.00 4.50 0.31 0.00 0.00 4.75 0.33 0.00 0.00 5.00 0,35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.45 0.00 0.00 6.25 0.47 0.01 0.00 6.50 0.50 0.01 0.00 6.75 0.52 0.02 0.01 7.00 0.55 0.02 0.01 7.25 0.58 0.03 0.01 7.50 0.61 0.03 0.01 7.75 0.64 0.04 0.01 8.00 0.67 0.05 0.01 8.25 0.70 0.06 0.01 8.50 0.74 0.07 0.02 8.75 0.78 0.08 0.02 9.00 0.82 0.10 0.02 9.25 0.86 0,11 0.02 9.50 0.91 0,13 0.02 9.75 0.96 0.15 0.03 10.00 1.01 0.18 0.03 10.25 1.07 0.21 0.04 10.50 1.14 0.24 0.05 10.75 1.22 0.28 0.06 11.00 1.31 0.34 0.07 11.25 1.43 0.41 0.09 11.50 1.58 0.50 0.13 11.75 2.16 0.91 0.58 12.00 3.69 2.19 2.04 12.25 3.93 2.40 0.31 12.50 4.09 2,54 0.19 12.75 4.21 2.64 0.13 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 4.30 2.73 0.11 13.25 4.38 2.80 0.10 13.50 4.45 2.86 0.08 13.75 4.51 2.92 0.07 14.00 4.57 2.97 0.07 14.25 4.62 3.02 0.06 14.50 4.67 3.06 0.06 14.75 4.71 3.10 0,06 15.00 4.75 3.14 0.05 15.25 4.79 3.18 0.05 15.50 4.83 3.21 0.05 15.75 4.87 3.25 0.04 16.00 4.90 3.28 0.04 16.25 4.93 3.31 0.04 16.50 4.96 3.33 0.04 16.75 4.99 3.36 0.04 17.00 5.02 3.39 0.04 17.25 5.05 3.42 0.03 17.50 5.08 3.44 0.03 17.75 5.10 3.46 0A3 18.00 5.13 3.49 0.03 18.25 5.15 3.51 0.03 18.50 5.18 3.53 0.03 18.75 5.20 3.55 0.03 19.00 5.22 3.57 0.03 19.25 5.24 3.59 0.03 19.50 5.26 3.61 0.03 19.75 5.28 3.63 0.02 20.00 5.30 3.65 0.02 20.25 5.32 3.67 0.02 20.50 5.34 3.68 0.02 20.75 5.36 3.70 0.02 21.00 5.37 3.71 0.02 21.25 5.39 3.73 0.02 21.50 5.41 3.75 0.02 21,75 5.43 3.76 0.02 22.00 5.44 3.78 0.02 22.25 5,46 3.79 0.02 22.50 5.47 3.81 0.02 22.75 5.49 3.82 0.02 23.00 5.51 3.84 0.02 23.25 5.52 3.85 0.02 23.50 5.54 3.87 0.02 23.75 5.55 3.88 OM 24.00 5.57 3.90 0A2 Pre Type 11 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 24 Summary for Subcatchment 3S: Pre -3 to PQA3 Runoff = 4.61 cfs @ 11.96 hrs, Volume= 0.261 af, ❑epth> 5.21" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Description 0.050 80 >75% Grass cover, Good, HSG D 0.550 98 Paved parking, HSG ❑ 0.600 97 Weighted Average 0.050 8.33% Pervious Area 0.550 91.67% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 3S: Pre -3 to POA3 Hydrograph p Runoff Type II 24-hr 4 10 YR Rainfall=5.57" Runoff Area=0.600 ac -runoff Volume=0.261 of 3 Runoff Depth>5.21" 0 LL Tc=6.0 min 21 1 11 1 CN=97 ❑ .. . 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 2O 21 22 23 24 Time (hours) Pre Type it 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2i412020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Paae 25 Hydrograph for Subcatchment 3S: Pre -3 to POA3 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0A0 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.01 0.01 2.00 0.12 0.01 0.01 2.25 0.14 0.02 0.01 2.50 0.16 0.02 0.02 2.75 0.17 0.03 0.02 3.00 0.19 0.04 0.02 3.25 0.21 0.05 0.02 3.50 0.23 0.06 0.03 3.75 0.25 0.07 0.03 4.00 0.27 0.08 0.03 4.25 0.29 0.09 0.03 4.50 0.31 0.11 0.03 4.75 0.33 0.12 0.04 5.00 0,35 0,14 0.04 5.25 0.37 0,16 0.04 5.50 0.40 0.17 0.04 5.75 0.42 0.19 0.05 6.00 0.45 0.21 0.05 6.25 0.47 0.23 0.05 6.50 0.50 0.25 0.05 6.75 0.52 0.28 0.05 7.00 0.55 0.30 0.06 7.25 0.58 0.32 0.06 7.50 0.61 0.35 0.06 7.75 0.64 0.37 0.06 8.00 0.67 0.40 0.06 8.25 0.70 0.43 0.07 8.50 0.74 0.46 0.08 8.75 0.78 0.50 0.09 9.00 0.82 0.54 0.10 9.25 0.86 0.58 0.10 9.50 0.91 0.62 0.10 9.75 0.96 0.66 0.11 10.00 1.01 0.71 0.12 10.25 1.07 0.77 0.14 10.50 1.14 0.83 0.16 10.75 1.22 0.91 0.19 11.00 1.31 1.00 0.22 11.25 1.43 1.11 0.28 11.50 1.58 1.26 0.36 11.75 2.16 1.82 1.63 12.00 3.69 3.35 4.25 12.25 3.93 3.58 0.57 12.50 4.09 3.74 0.36 12.75 4.21 3.86 0.26 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 4.30 3.95 0.22 13.25 4.38 4.03 OA 9 13.50 4.45 4.10 OA 7 13.75 4.51 4.16 OA 5 14.00 4.57 4.22 OA 3 14.25 4.62 4.27 0.12 14.50 4.67 4.31 0.11 14.75 4.71 4.36 0.11 15.00 4.75 4.40 0.10 15.25 4.79 4.44 0.10 15.50 4.83 4.48 0.09 15.75 4.87 4.52 0.09 16.00 4.90 4.55 0.08 16.25 4.93 4.58 0.08 16.50 4.96 4.61 0.07 16.75 4.99 4.64 0.07 17.00 5.02 4.67 0.07 17.25 5.05 4.70 0.07 17.50 5.08 4.72 0.07 17.75 5.10 4.75 OM 18.00 5.13 4,78 0.06 18.25 5.15 4.80 0.06 18.50 5.18 4.82 0.06 18.75 5.20 4.85 0,05 19.00 5.22 4.87 0.05 19.25 5.24 4.89 0.05 19.50 5.26 4.91 0.05 19.75 5.28 4.93 0.05 20.00 5.30 4.95 0.04 20.25 5.32 4.97 0.04 20.50 5.34 4.98 0.04 20.75 5.36 5.00 0.04 21.00 5.37 5.02 0.04 21.25 5.39 5.04 0.04 21.50 5.41 5.05 0.04 21,75 5.43 5.07 0.04 22.00 5.44 5.09 0.04 22.25 5,46 5.10 0.04 22.50 5.47 5.12 0.04 22.75 5.49 5.14 0.04 23.00 5.51 5.15 O,04 23.25 5.52 5.17 0.04 23.50 5.54 5.18 0.04 23.75 5.55 5.20 0.04 24.00 5.57 5.22 0.04 Pre Type !I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 26 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Star -Ind method Subcatchment1 S: Pre -1 to PQA1 Runoff Area=0.580 ac 67.24% Impervious Runoff Depth>8.17" Tc=6.0 min CN=92 Runoff=7.19 cfs 0.395 of Subcatchment2S: Pre -2 to PQA2 Runoff Area=0.330 ac 27.27% Impervious Runoff Depth>7.31" Flow Length=157' Slope=0.0600 7' Tc=7.5 min CN=85 Runoff=3.73 cfs 0.201 of Subcatchment3S: Pre -3 to POA3 Runoff Area=0.600 ac 91.67% impervious Runoff Depth>8.77" Tc=6.0 min CN=97 Runoff=7.60 cfs 0.439 of Total Runoff Area = 1.510 ac Runoff Volume = 1.034 of Average Runoff Depth = 8.22" 31.79% Pervious = 0.480 ac 68.21% Impervious = 1.030 ac Pre Type !I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 27 Summary for Subcatchment 1S: Pre -1 to POM Runoff = 7.19 cfs @ 11.96 hrs, Volume= 0.395 af, Depths 8.17" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN DesCriotion 0.190 80 >75% Grass cover, Good, HSG D 0.390 98 Paved parking, HSG ❑ 0.580 92 Weighted Average 0.190 32.76% Pervious Area 0.390 67.24% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (Cfs) 6.0 Direct Entry, Subcatchment 1S: Pre -1 to POM Hydrograph 8 7 Type II 24-hr 6 100 YR Rainfall=9.14" Runoff Area=0.580 ac 5 Runoff Val ume=0.395 of Runoff Depth>8.17" 3 4 LL Tc=6.0 min 3 CN=92 2 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) 0 Runoff Pre Type 1124-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Paae 28 Hydrograph for Subcatchment 1 S: Pre -1 to POA1 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 0A0 1.25 0.12 0.00 0.00 1,50 0.15 0.00 0.00 1.75 0.17 0.00 0.00 2.00 0.20 0.00 0.00 2.25 0.23 0.00 0.01 2.50 0.26 0.01 0.01 2.75 0.29 0.01 0.01 3.00 0.32 0.02 0.02 3.25 0.35 0.03 0.02 3.50 0.38 0.04 0.02 3.75 0.41 0.05 0.03 4.00 0.44 0.06 0.03 4.25 0.47 0.08 0.03 4.50 0.50 0.09 0.04 4.75 0.54 0.11 0.04 5.00 0.58 0,13 0.04 5.25 0.61 0,15 0.05 5.50 0.65 0.17 0.05 5.75 0.69 0.19 0.06 6.00 0.73 0.22 0.06 6.25 0.77 0.24 0.06 6.50 0.82 0.27 0.07 6.75 0.86 0.30 0.07 7.00 0.90 0.33 0.07 7.25 0.95 0.37 0.08 7.50 1.00 0.40 0.08 7.75 1.05 0.44 0.08 8.00 1.10 0.48 0.09 8.25 1.15 0.52 0.10 8.50 1.21 0.56 0.11 8.75 1.27 0.61 0.12 9.00 1.34 0.67 0.14 9.25 1.42 0.73 0.14 9.50 1.49 0.79 0.14 9.75 1.57 0.86 0.16 10.00 1.65 0.93 0.18 10.25 1.75 1.02 0.20 10.50 1.86 1.12 0.23 10.75 1.99 1.23 0.28 11.00 2.15 1.37 0.33 11.25 2.34 1.55 0.43 11.50 2.59 1.77 0.55 11.75 3.54 2.67 2.50 12.00 6.06 5.13 6.65 12.25 6.45 5.52 0.89 12.50 6.72 5.78 0.57 12.75 6.90 5.96 0.42 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 7.06 6.11 0.35 13.25 7.19 6.24 0.30 13.50 7.30 6.35 0.26 13,75 7,40 6.45 0.23 14.00 7.49 6.54 0.21 14.25 7.58 6.63 0.19 14.50 7.66 6.70 0.18 14.75 7.73 6.78 0.17 15.00 7.80 6.85 OA 6 15.25 7.87 6.91 OA 5 15.50 7.93 6.97 0.14 15.75 7.99 7.03 OA 3 16.00 8.04 7.09 OA 3 16.25 8.10 7.14 0.12 16.50 8.15 7A9 0.12 16.75 8.19 7.24 0.11 17.00 8.24 7.28 0.11 17.25 8.29 7.33 OA 1 17.50 8.33 7.37 0.10 17.75 8.38 7.42 0.10 18.00 8.42 7.46 0.10 18.25 8.46 7.50 0.09 18.50 8.50 7.54 0.09 18.75 8.53 7.57 OM 19.00 8.57 7.61 0.08 19.25 8.61 7.64 0.08 19.50 8.64 7.68 0.08 19.75 8.67 7.71 0.07 20.00 8.70 7.74 0.07 20.25 8.73 7.77 0.07 20.50 8.76 7.80 0.07 20.75 8.79 7.83 0.07 21.00 8.82 7.85 0.07 21.25 8.85 7.88 0.07 21.50 8.87 7.91 0.07 21,75 8.90 7.94 0.06 22.00 8.93 7.96 0.06 22.25 8.96 7.99 0.06 22.50 8.98 8.02 0.06 22.75 9.01 8.05 0.06 23.00 9.04 8.07 OM 23.25 9.06 8.10 0.06 23.50 9.09 8.12 0.06 23.75 9.11 8.15 OM 24.00 9.14 8.17 OM Pre Type !I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 29 Summary for Subcatchment 2S: Pre -2 to POA2 Runoff = 3.73 cfs @ 11.98 hrs, Volume= 0.201 af, Depths 7.31" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN Description 0.240 80 >75% Grass cover, Good, HSG D 0.090 98 Paved parking, HSG ❑ 0.330 85 Weighted Average 0.240 72.73% Pervious Area 0.090 27.27% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ft/sec) (cfs) 7.3 132 0.0600 0.30 Sheet Flow, Grass: Short n= 0.150 P2= 3.70" 0.2 25 0.0600 1.74 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.70" 7.5 157 Total Subcatchment 2S: Pre -2 to POA2 Hydrograph 4 ❑ Runoff Type II 24-hr 100 YR Rainfall=9.14" 31 1 1, Runoff Area=0.330 ac 2 Runoff Vol ume=0.201 of I 1 11 1 Runoff Depth>7.31" Flow Length=157' Slope=0.0600 '/' Tc=7.5 min 11 � k CN=85 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Pre Type 1124-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Paae 30 Hydrograph for Subcatchment 2S: Pre -2 to POA2 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 OM 1.25 0.12 0.00 0.00 1,50 0.15 0.00 0.00 1.75 0.17 0.00 0.00 2.00 0.20 0.00 0.00 2.25 0.23 0.00 0.00 2.50 0.26 0.00 0.00 2.75 0.29 0.00 0.00 3.00 0.32 0.00 0.00 3.25 0.35 0.00 0.00 3.50 0.38 0.00 0.00 3.75 0.41 0.00 0.00 4.00 0.44 0.00 0.00 4.25 0.47 0.01 0.00 4.50 0.50 0.01 0.01 4.75 0.54 0.02 0.01 5.00 0.58 0.02 0.01 5.25 0.61 0.03 0.01 5.50 0.65 0.04 0.01 5.75 0.69 0.05 0.01 6.00 0.73 0.07 0.02 6.25 0.77 0.08 0.02 6.50 0.82 0.10 0.02 6.75 0.86 0.11 0.02 7.00 0.90 0.13 0.02 7.25 0.95 0.15 0.03 7.50 1.00 0.17 0.03 7.75 1.05 0.20 0.03 8.00 1.10 0.22 0.03 8.25 1.15 0.25 0.04 8.50 1.21 0.28 0.04 8.75 1.27 0.32 0.05 9.00 1.34 0.36 0.05 9.25 1.42 0.40 0.06 9.50 1.49 0.45 0.06 9.75 1.57 0.50 0.07 10.00 1.65 0.55 0.08 10.25 1.75 0.62 0.09 10.50 1.86 0.70 0.10 10.75 1.99 0.79 0.13 11.00 2.15 0.91 0.15 11.25 2.34 1.05 0.20 11.50 2.59 1.25 0.26 11.75 3.54 2.05 1.13 12.00 6.06 4.36 3.67 12.25 6.45 4.73 0.54 12.50 6.72 4.98 0.33 12.75 6.90 5.16 0.23 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 7.06 5.31 0.19 13.25 7.19 5.43 OA 7 13.50 7.30 5.54 OA 5 13,75 7,40 5.64 OA 3 14.00 7.49 5.73 0.11 14.25 7.58 5.81 0.11 14.50 7.66 5.88 0.10 14.75 7.73 5.95 0.10 15.00 7.80 6.02 0.09 15.25 7.87 6.09 0.09 15.50 7.93 6.15 0.08 15.75 7.99 6.20 0.07 16.00 8.04 6.25 0.07 16.25 8.10 6.30 0.07 16.50 8.15 6.35 0.06 16.75 8.19 6.40 0.06 17.00 8.24 6.45 0.06 17.25 8.29 6.49 0.06 17.50 8.33 6.53 0A6 17.75 8.38 6.58 OM 18.00 8.42 6.62 0.05 18.25 8.46 6.66 0.05 18.50 8.50 6.69 0.05 18.75 8.53 6.73 O,05 19.00 8.57 6.77 0.05 19.25 8.61 6.80 0.04 19.50 8.64 6.83 0.04 19.75 8.67 6.86 0.04 20.00 8.70 6.89 0.04 20.25 8.73 6.92 0.04 20.50 8.76 6.95 0.04 20.75 8.79 6.98 0.04 21.00 8.82 7.00 0.04 21.25 8.85 7.03 0.04 21.50 8.87 7.06 0.04 21,75 8.90 7.09 0.04 22.00 8.93 7.11 0.04 22.25 8.96 7.14 0.04 22.50 8.98 7.17 0.03 22.75 9.01 7.19 0.03 23.00 9.04 7.22 OM 23.25 9.06 7.24 0.03 23.50 9.09 7.27 0.03 23.75 9.11 7.29 0.03 24.00 9.14 7.32 0.03 Pre Type 1124-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HvdroCAD® 10.00-20 sln 06538 © 2017 HvdroCAD Software Solutions LLC Paae 31 Summary for Subcatchment 3S: Pre -3 to PQA3 Runoff = 7.60 cfs [7a 11.96 hrs, Volume= 0.439 af, Depths 8.77" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN Description 0.050 80 >75% Grass cover, Good, HSG D 0.550 98 Paved parking, HSG D 0.600 97 Weighted Average 0.050 8.33% Pervious Area 0.550 91.67% Impervious Area Tc Length Slope Velocity Capacity Description (min) {feet} (ftlft) [ftlsec] (cfs) 6.0 Direct Entry, Subcatchment 3S: Pre -3 to POA3 Hydrograph Type II 24-hr 100 YR Rainfall=9.14" Runoff Area=0.600 at -Runoff Volume=0.439 of 5- _ _ __ROn__ off , De_pth?8.77" U. 4= Tc=6.0 min 3- CN=97 2 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Pre Type 1124-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Paae 32 Hydrograph for Subcatchment 3S: Pre -3 to POA3 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 0,01 1.25 0.12 0.01 0.02 1,50 0.15 0.02 0.02 1.75 0.17 0.03 0.03 2.00 0.20 0.04 0.03 2.25 0.23 0.06 0.04 2.50 0.26 0.08 0.04 2.75 0.29 0.09 0.05 3.00 0.32 0.11 0.05 3.25 0.35 0.14 0.05 3.50 0.38 0.16 0.06 3.75 0.41 0.18 0.06 4.00 0.44 0.21 0.06 4.25 0.47 0.23 0.06 4.50 0.50 0.26 0.07 4.75 0.54 0.29 0.07 5.00 0.58 0.32 0.07 5.25 0.61 0.35 0.08 5.50 0.65 0.39 0.08 5.75 0.69 0.42 0.09 6.00 0.73 0.46 0.09 6.25 0.77 0.50 0.09 6.50 0.82 0.53 0.09 6.75 0.86 0.57 0.10 7.00 0.90 0.62 0.10 7.25 0.95 0.66 0.10 7.50 1.00 0.70 0.11 7.75 1.05 0.75 0.11 8.00 1.10 0.80 0.11 8.25 1.15 0.85 0.12 8.50 1.21 0.90 0.14 8.75 1.27 0.97 0.15 9.00 1.34 1.03 0.17 9.25 1.42 1,10 0.17 9.50 1.49 1,17 0.17 9.75 1.57 1.25 0.19 10.00 1.65 1.33 0.21 10.25 1.75 1.43 0.24 10.50 1.86 1.54 0.27 10.75 1.99 1.67 0.32 11.00 2.15 1.82 0.37 11.25 2.34 2.01 0.47 11.50 2.59 2.25 0.61 11.75 3.54 3.19 2.70 12.00 6.06 5.70 7.01 12.25 6.45 6.10 0.93 12.50 6.72 6.36 0.60 12.75 6.90 6.54 0.44 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 7.06 6.70 0.36 13.25 7.19 6.83 0.31 13.50 7.30 6.94 0.27 13,75 7,40 7.05 0.24 14.00 7.49 7.14 0.21 14.25 7.58 7.22 0.20 14.50 7.66 7.30 0.19 14.75 7.73 7.37 0.18 15.00 7.80 7.44 0.17 15.25 7.87 7.51 0.16 15.50 7.93 7.57 0.15 15.75 7.99 7.63 0.14 16.00 8.04 7.68 0.13 16.25 8.10 7.74 0.12 16.50 8.15 7.79 0.12 16.75 8.19 7.83 0.12 17.00 8.24 7.88 0.11 17.25 8.29 7.93 0.11 17.50 8.33 7.97 0.11 17.75 8.38 8.02 0.10 18.00 8.42 8.06 0.10 18.25 8.46 8.10 0.10 18.50 8.50 8.14 0.09 18.75 8.53 8.17 0,09 19.00 8.57 8.21 0.09 19.25 8.61 8.25 0.08 19.50 8.64 8.28 0.08 19.75 8.67 8.31 0.08 20.00 8.70 8.34 0.07 20.25 8.73 8.37 0.07 20.50 8.76 8.40 0.07 20.75 8.79 8.43 0.07 21.00 8.82 8.46 0.07 21.25 8.85 8.49 0.07 21.50 8.87 8.51 0.07 21,75 8.90 8.54 0.07 22.00 8.93 8.57 0.07 22.25 8.96 8.60 0.07 22.50 8.98 8.62 0.07 22.75 9.01 8.65 0.06 23.00 9.04 8.68 OM 23.25 9.06 8.70 0.06 23.50 9.09 8.73 0.06 23.75 9.11 8.75 OM 24.00 9.14 8.78 0A6 SS 55 2S 75 Post-1 to POA1 Post-2 to POA2 Post-3A to POA3 Post-3 to POA3 4P Pipe Storage 8L POA3 5uticat Reach On Link Routing Diagram for Post Prepared by Timmons Group, Printed 214l2020 HydroCADO 10.00-20 sin 06538 02017 HydroCAD Software Solutions LLC Post Prepared by Timmons Group Printed 21412620 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (subcatch meet-n umbers) 0.270 80 >75% Grass cover, Good, HSG D (2S, 5S, 6S, 7S) 1.240 98 Paved parking, HSG D (2S, 5S, 6S) 1.510 95 TOTAL AREA Post Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.000 HSG B 0.000 HSG C 1.510 HSG D 2S, 5S, BS, 7S 0A00 Other 1.510 TOTAL AREA Post Prepared by Timmons Group HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Printed 2/4/2020 Page 4 Ground Covers (all nodes) HSG-A HSG-B MSG-C HSG-❑ Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.000 0.000 0.270 0.000 0.270 >75% Grass cover, Good 2S> 5S, 6S, 7S 0.000 0.000 0.000 1.240 0.000 1.240 Paved parking 2S, 5S, 6S 0.000 0.000 0.000 1.510 0.000 1.510 TOTAL AREA Post Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln O6538 © 2017 HydroCAD Software Solutions LLC Page 5 Pipe Listing (all nodes) Line# Node In -Invert Out -Invert Length Slope n DiamlWidth Height Inside -Fill Number (feet) (feet) (feet) (ftlft) (inches) (inches) (inches) 1 4P 574.50 573.75 75.0 0.0100 0.018 12.0 0.0 0.0 Post Type I! 24-hr 7 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 6 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Star -Ind method Subcatchment2S: Post-3Ato POA3 Runoff Area=0.820 ac 91.46% Impervious Runoff Depth>2.59" Tc=6.0 min CN=96 Runoff=3.31 cfs 0.177 of Subcatchment5S: Post-2 to POA2 Runoff Area=0.190 ac 73.68% Impervious Runoff Depth>2.29" Tc=6.0 min CN=93 Runoff=0.71 cfs 0.036 of Subcatchment6S: Post-1 to POA1 Runoff Area=0.490 ac 71.43% Impervious Runoff Depth>2.29" Tc=6.0 min CN=93 Runoff=1.83 cfs 0.094 of Subcatchment7S: Post-313 to POA3 Runoff Area=0.010 ac 0.00% Impervious Runoff Depth>1.28" Tc=6.0 min CN=80 Runoff=0.02 cfs 0.001 of Pond 4P: Pipe Storage Peak Elev=575.88' Storage=1,898 cf Inflow=3.31 cfs 0.177 of Outflow=1.34 cfs 0.176 of Link 8L: POA3 Inflow=1.35 cfs 0.177 of Primary= 1.35 cfs 0.177 of Total Runoff Area = 1.510 ac Runoff Volume = 0.308 of Average Runoff Depth = 2.45" 17.88% Pervious = 0.270 ac 82.12% Impervious = 1.240 ac Post Type 1124-hr 7 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 7 Summary for Subcatchment 2S: Post-3A to POA3 Runoff = 3.31 cfs @ 11.96 hrs, Vol ume= 0.177 af, Depths 2.59" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1 YR Rainfall=3.04" Area (ac) CN ❑escriotion 0.750 98 Paved parking, HSG ❑ 0.070 80 >75% Grass cover, Good, HSG D 0.820 96 Weighted Average 0.070 8.54% Pervious Area 0.750 91.46% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ft/sec) (cfs) 6.0 Direct Entry, 3 U 2 3 0 LL pk Subcatchment 2S: Post-3A to POA3 Hydrograph Type II 24-hr 1 YR Rainfall=3.04" Runoff Area=0.820 ac Runoff Volume=0.177 of Runoff Depth>2.59" Tc=6.0 min CN=96 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Post Type I! 24-hr 7 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Page 8 Hydrograph for Subcatchment 2S: Post-3A to POA3 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.02 0.00 0.00 1.00 0.03 0.00 0A0 1.25 0.04 0.00 0.00 1,50 0.05 0.00 0.00 1.75 0.06 0.00 0.00 2.00 0.07 0.00 0.00 2.25 0.08 0.00 0.00 2.50 0.09 0.00 0.00 2.75 0.10 0.00 0.00 3.00 0.10 0.00 0.00 3.25 0.11 0.00 0.00 3.50 0.13 0.00 0.01 3.75 0.14 0.01 0.01 4.00 0.15 0.01 0.01 4.25 0.16 0.01 0.01 4.50 0.17 0.01 0.01 4.75 0.18 0.02 0.01 5.00 0.19 0.02 0.01 5.25 0.20 0.03 0.02 5.50 0.22 0.03 0.02 5.75 0.23 0.04 0.02 6.00 0.24 0.04 0.02 6.25 0.26 0.05 0.02 6.50 0.27 0.06 0.02 6.75 0.29 0.07 0.03 7.00 0.30 0.07 0.03 7.25 0.32 0.08 0.03 7.50 0.33 0.09 0.03 7.75 0.35 0.10 0.03 8.00 0.36 0.11 0.03 8.25 0.38 0.13 0.04 8.50 0.40 0.14 0.04 8.75 0.42 0.15 0.05 9.00 0.45 0.17 0.06 9.25 0.47 0,19 0.06 9.50 0.50 0.20 0.06 9.75 0.52 0.22 0.07 10.00 0.55 0.25 0.07 10.25 0.58 0.27 0.09 10.50 0.62 0.30 0.10 10.75 0.66 0.34 0.12 11.00 0.71 0.38 0.14 11.25 0.78 0.43 0.19 11.50 0.86 0.51 0.24 11.75 1.18 0.79 1.12 12.00 2.02 1.59 3.07 12.25 2.15 1.72 0.41 12.50 2.23 1.80 0.26 12.75 2.30 1.86 0.19 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.35 1.91 0.16 13.25 2.39 1.95 OA 4 13.50 2.43 1.99 OA 2 13,75 2,46 2.02 OA 1 14.00 2.49 2.05 0.10 14.25 2.52 2.08 0.09 14.50 2.55 2.11 0.08 14.75 2.57 2.13 OA8 15.00 2.59 2.15 0.08 15.25 2.62 2.18 0.07 15.50 2.64 2.20 0.07 15.75 2.66 2.22 0.06 16.00 2.68 2.23 0.06 16.25 2.69 2.25 0.06 16.50 2.71 2.27 0.05 16.75 2.73 2.28 0.05 17.00 2.74 2.30 0.05 17.25 2.76 2.31 0.05 17.50 2.77 2.33 0.05 17.75 2.79 2.34 0.05 18.00 2.80 2.36 0.05 18.25 2.81 2.37 0.04 18.50 2.83 2.38 0.04 18.75 2.84 2.39 0.04 19.00 2.85 2.41 0.04 19.25 2.86 2.42 0.04 19.50 2.87 2.43 0.04 19.75 2.88 2.44 0.03 20.00 2.89 2.45 0.03 20.25 2.90 2.46 0.03 20.50 2.91 2.47 0.03 20.75 2.92 2.48 0.03 21.00 2.93 2.49 0.03 21.25 2.94 2.50 0.03 21.50 2.95 2.50 0.03 21,75 2.96 2,51 0.03 22.00 2.97 2.52 0.03 22.25 2.98 2.53 0.03 22.50 2.99 2.54 0.03 22.75 3.00 2.55 0.03 23.00 3.01 2.56 OM 23.25 3.01 2.57 0.03 23.50 3.02 2.57 0.03 23.75 3.03 2.58 0.03 24.00 3.04 2.59 0.03 Post Type 1124-hr 7 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 9 Summary for Subcatchment 5S: Post-2 to POA2 Runoff = 0.71 cfs @ 11.96 hrs, Vol ume= 0.036 af, ❑epth> 2.29" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1 YR Rainfall=3.04" Area (ac) CN Description 0.050 80 >75% Grass cover, Good, HSG D 0.140 98 Paved parking, HSG ❑ 0.190 93 Weighted Average 0.050 26.32% Pervious Area 0.140 73.68% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 5S: Post-2 to PQA2 Hydrograph ❑ Runoff 0.7 Type II 24-hr 0.65. 1 YR Rainfall=3.04" 0.6 0.55. Runoff Area=0.190 aic 05 Runoff Volume=0.036 of 3 °4 Runoff Depth>2.29" LL 0.35 Tc=6.0 min °3 CN=93 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Post Type I! 24-hr 7 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Pape 10 Hydrograph for Suhcatchment 5S: Post-2 to PQA2 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.02 0.00 0.00 1.00 0.03 0.00 0A0 1.25 0.04 0.00 0.00 1,50 0.05 0.00 0.00 1.75 0.06 0.00 0.00 2.00 0.07 0.00 0.00 2.25 0.08 0.00 0.00 2.50 0.09 0.00 0.00 2.75 0.10 0.00 0.00 3.00 0.10 0.00 0.00 3.25 0.11 0.00 0.00 3.50 0.13 0.00 0.00 3.75 0.14 0.00 0.00 4.00 0.15 0.00 0.00 4.25 0.16 0.00 0.00 4.50 0.17 0.00 0.00 4.75 0.18 0.00 0.00 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.01 0.00 5.75 0.23 0.01 0.00 6.00 0.24 0.01 0.00 6.25 0.26 0.01 0.00 6.50 0.27 0.02 0.00 6.75 0.29 0.02 0.00 7.00 0.30 0.03 0.00 7.25 0.32 0.03 0.00 7.50 0.33 0.04 0.00 7.75 0.35 0.04 0.00 8.00 0.36 0.05 0.00 8.25 0.38 0.05 0.01 8.50 0.40 0.06 0.01 8.75 0.42 0.07 0.01 9.00 0.45 0.08 0.01 9.25 0.47 0,10 0.01 9.50 0.50 0,11 0.01 9.75 0.52 0.12 0.01 10.00 0.55 0.14 0.01 10.25 0.58 0.16 0.01 10.50 0.62 0.18 0.02 10.75 0.66 0.21 0.02 11.00 0.71 0.24 0.03 11.25 0.78 0.29 0.04 11.50 0.86 0.34 0.05 11.75 1.18 0.59 0.23 12.00 2.02 1.33 0.66 12.25 2.15 1.45 0.09 12.50 2.23 1.53 0.06 12.75 2.30 1.59 0.04 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.35 1.64 0.04 13.25 2.39 1.68 0.03 13.50 2.43 1.71 0A3 13,75 2,46 1,74 0.02 14.00 2.49 1.77 0.02 14.25 2.52 1.80 0.02 14.50 2.55 1.82 0.02 14.75 2.57 1.85 OM 15.00 2.59 1.87 0.02 15.25 2.62 1.89 0.02 15.50 2.64 1.91 0.01 15.75 2.66 1.93 0.01 16.00 2.68 1.94 0.01 16.25 2.69 1.96 0.01 16.50 2.71 1.98 0.01 16.75 2.73 1.99 0.01 17.00 2.74 2.01 0.01 17.25 2.76 2.02 0.01 17.50 2.77 2.04 0.01 17.75 2.79 2.05 0.01 18.00 2.80 2.06 0.01 18.25 2.81 2.08 0.01 18.50 2.83 2.09 0.01 18.75 2.84 2.10 0.01 19.00 2.85 2.11 0,01 19.25 2.86 2.12 0.01 19.50 2.87 2.13 0.01 19.75 2.88 2.14 0.01 20.00 2.89 2.15 0.01 20.25 2.90 2.16 0.01 20.50 2.91 2.17 0.01 20.75 2.92 2.18 0.01 21.00 2.93 2.19 0.01 21.25 2.94 2.20 0.01 21.50 2.95 2.21 0.01 21,75 2.96 2.22 0.01 22.00 2.97 2.23 0.01 22.25 2.98 2.23 0.01 22.50 2.99 2.24 0.01 22.75 3.00 2.25 0.01 23.00 3.01 2.26 0,01 23.25 3.01 2.27 0.01 23.50 3.02 2.28 0.01 23.75 3.03 2.28 0.01 24.00 3.04 2.29 0,01 Post Type!/ 24-hr 7 YR Rainfall=3. d4" Prepared by Timmons Group Printed 2/4/2020 H droCADR 10.00-20 sln 06538 © 2017 H droCAD Software Solutions LLC Pa e 11 Summary for Subcatchment 6S: Post-1 to POA1 Runoff = 1.83 cfs @ 11.96 hrs, Volume- 0.094 af, ❑epth> 2.29" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1 YR Rainfall=3.04" Area (ac) CN Descriotion 0.140 80 >75% Grass cover, Good, HSG D 0.350 98 Paved parking, HSG ❑ 0.490 93 Weighted Average 0.140 28.57% Pervious Area 0.350 71.43% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftift) (ftlsec) (cfs) 6.0 Direct Entry, 2 N 3 1 0 LL Subcatchment 6S: Post-1 to PQA1 Hydrograph Type II 24-hr 1 YR Rainfall=3.04" Runoff Area=0.490 ac Runoff Volume=0.094 of Runoff Depth>2.29" Tc=6.0 mite CN=93 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ RunpFf Post Type I! 24-hr 7 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Pape 12 Hydrograph for 5uhcatchment 65: Post -'I to PQAl Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.02 0.00 0.00 1.00 0.03 0.00 0A0 1.25 0.04 0.00 0.00 1,50 0.05 0.00 0.00 1.75 0.06 0.00 0.00 2.00 0.07 0.00 0.00 2.25 0.08 0.00 0.00 2.50 0.09 0.00 0.00 2.75 0.10 0.00 0.00 3.00 0.10 0.00 0.00 3.25 0.11 0.00 0.00 3.50 0.13 0.00 0.00 3.75 0.14 0.00 0.00 4.00 0.15 0.00 0.00 4.25 0.16 0.00 0.00 4.50 0.17 0.00 0.00 4.75 0.18 0.00 0.00 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.01 0.00 5.75 0.23 0.01 0.00 6.00 0.24 0.01 0.01 6.25 0.26 0.01 0.01 6.50 0.27 0.02 0.01 6.75 0.29 0.02 0.01 7.00 0.30 0.03 0.01 7.25 0.32 0.03 0.01 7.50 0.33 0.04 0.01 7.75 0.35 0.04 0.01 8.00 0.36 0.05 0.01 8.25 0.38 0.05 0.01 8.50 0.40 0.06 0.02 8.75 0.42 0.07 0.02 9.00 0.45 0.08 0.02 9.25 0.47 0,10 0.02 9.50 0.50 0,11 0.03 9.75 0.52 0.12 0.03 10.00 0.55 0.14 0.03 10.25 0.58 0.16 0.04 10.50 0.62 0.18 0.05 10.75 0.66 0.21 0.06 11.00 0.71 0.24 0.07 11.25 0.78 0.29 0.09 11.50 0.86 0.34 0.12 11.75 1.18 0.59 0.58 12.00 2.02 1.33 1.71 12.25 2.15 1.45 0.23 12.50 2.23 1.53 0.15 12.75 2.30 1.59 0.11 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.35 1.64 0.09 13.25 2.39 1.68 0.08 13.50 2.43 1.71 0.07 13,75 2,46 1,74 0.06 14.00 2.49 1.77 0.05 14.25 2.52 1.80 0.05 14.50 2.55 1.82 0.05 14.75 2.57 1.85 0.05 15.00 2.59 1.87 0.04 15.25 2.62 1.89 0.04 15.50 2.64 1.91 0.04 15.75 2.66 1.93 0.04 16.00 2.68 1.94 0.03 16.25 2.69 1.96 0.03 16.50 2.71 1.98 0.03 16.75 2.73 1.99 0.03 17.00 2.74 2.01 0.03 17.25 2.76 2.02 0.03 17.50 2.77 2.04 0.03 17.75 2.79 2.05 0A3 18.00 2.80 2.06 0.03 18.25 2.81 2.08 0.03 18.50 2.83 2.09 0.02 18.75 2.84 2.10 0.02 19.00 2.85 2.11 0.02 19.25 2.86 2.12 0.02 19.50 2.87 2.13 0.02 19.75 2.88 2.14 0.02 20.00 2.89 2.15 0.02 20.25 2.90 2.16 0.02 20.50 2.91 2.17 0.02 20.75 2.92 2.18 0.02 21.00 2.93 2.19 0.02 21.25 2.94 2.20 0.02 21.50 2.95 2.21 0.02 21,75 2.96 2.22 0.02 22.00 2.97 2.23 0.02 22.25 2.98 2.23 0.02 22.50 2.99 2.24 0.02 22.75 3.00 2.25 0.02 23.00 3.01 2.26 0.02 23.25 3.01 2.27 0.02 23.50 3.02 2.28 0.02 23.75 3.03 2.28 0.02 24.00 3.04 2.29 0A2 Post Type 1124-hr 7 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 13 Summary for Subcatchment 7S: Post-3B to POA3 Runoff = 0.02 cfs @ 11.98 hrs, Volume= 0.001 af, Depths 1.28" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1 YR Rainfall=3.04" Area (ac) CN Description 0.010 80 >75% Grass toyer, Good, HSG D 0.010 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ftlsec) (cfs) 6.0 Direct Entry, Subcatchment 7S: Post-3B to PQA3 Hydrograph V-VL3 0.022= Type 11 24-hr 0.021 0.02. 1 YR Rainfall=3.04" O.D19 0-018- Runoff Area=0.010 ac 0,017-: 0 01 Runoff Volume=0.001 of 0.015 F 0-D13 �j - -I Runoff DeptF��1.28" - Tc= 6.0 m i n ,� 0-a11 0-01-. CN=80 0.0091 a.00s . 0-007- 0.006 0.004 0.001 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Post Type I! 24-hr 7 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Paae 14 Hydrograph for Subcatchment 7S: Post-3B to PQA3 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.02 0.00 0.00 1.00 0.03 0.00 0A0 1.25 0.04 0.00 0.00 1,50 0.05 0.00 0.00 1.75 0.06 0.00 0.00 2.00 0.07 0.00 0.00 2.25 0.08 0.00 0.00 2.50 0.09 0.00 0.00 2.75 0.10 0.00 0.00 3.00 0.10 0.00 0.00 3.25 0.11 0.00 0.00 3.50 0.13 0.00 0.00 3.75 0.14 0.00 0.00 4.00 0.15 0.00 0.00 4.25 0.16 0.00 0.00 4.50 0.17 0.00 0.00 4.75 0.18 0.00 0.00 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.36 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.01 0.00 10.75 0.66 0.01 0.00 11.00 0.71 0.02 0.00 11.25 0.78 0.03 0.00 11.50 0.86 0.05 0.00 11.75 1.18 0.14 0.00 12.00 2.02 0.57 0.02 12.25 2.15 0.65 0.00 12.50 2.23 0.71 0.00 12.75 2.30 0.75 0.00 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.35 0.78 0.00 13.25 2.39 0.81 0.00 13.50 2.43 0.84 0.00 13,75 2,46 0.86 0.00 14.00 2.49 0.88 0.00 14.25 2.52 0.90 0.00 14.50 2.55 0.92 0.00 14.75 2.57 0.94 0.00 15.00 2.59 0.95 0.00 15.25 2.62 0.97 0.00 15.50 2.64 0.99 0.00 15.75 2.66 1.00 0.00 16.00 2.68 1.01 0.00 16.25 2.69 1.02 0.00 16.50 2.71 1.04 0.00 16.75 2.73 1.05 0.00 17.00 2.74 1.06 0.00 17.25 2.76 1.07 0A0 17.50 2.77 1.08 0.00 17.75 2.79 1.09 0.00 18.00 2.80 1.10 0.00 18.25 2.81 1.11 0.00 18.50 2.83 1.12 0.00 18.75 2.84 1.13 OM 19.00 2.85 1.14 0.00 19.25 2.86 1.15 0.00 19.50 2.87 1.16 OM 19.75 2.88 1.16 0.00 20.00 2.89 1.17 0.00 20.25 2.90 1.18 0.00 20.50 2.91 1.19 0.00 20.75 2.92 1.19 0.00 21.00 2.93 1.20 0.00 21.25 2.94 1.21 0.00 21.50 2.95 1.21 0.00 21,75 2.96 1.22 0.00 22.00 2.97 1.23 0.00 22.25 2.98 1.23 0.00 22.50 2.99 1.24 OM 22.75 3.00 1.25 0.00 23.00 3.01 1.25 OM 23.25 3.01 1.26 0.00 23.50 3.02 1.27 0.00 23.75 3.03 1.27 0.00 24.00 3.04 1.28 0.00 Post Type I! 24-hr 7 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 15 Summary for Pond 4P: Pipe Storage Inflow Area = 0.820 ac, 91.46% Impervious, Inflow Depth > 2.59" for 1 YR event Inflow = 3.31 cfs @ 11.96 hrs, Vol ume= 0.177 of Outflow = 1.34 cfs @ 12.08 hrs, Volume= 0.176 af, Atten= 59%, Lag= 7.2 min Primary = 1.34 cfs @ 12.08 hrs, Volume= 0.176 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 575,88' @ 12.08 hrs Surf.Area= 1,794 sf Storage= 1,898 cf Plug -Flow detention time=18.9 min calculated for 0.176 of (99% of inflow) Center -of -Mass det. time= 15.4 min ( 786.9 - 771.5 ) Volume Invert Avail.Storage Storage Description #1 574.50' 4,241 cf 36.0" Round Pipe Storage L= 600.0' Device Routing Invert Outlet Devices #1 Primary 574.50' 12.0" Round Culvert L= 75.0' CMP, projecting, no headwall, Ke= 0.900 Inlet/ Outlet Invert= 574.50'/ 573-75' S= 0.0100 '1' Cc= 0.900 n= 0.018 Corrugated PE, corrugated interior, Flow Area= 0.79 sf #2 Device 1 574.50' 7.0" Vert. Orifice/Grate C= 0.600 #3 Device 1 575.90' 3.0' long Sharp -Crested Rectangular Weir 2 End Contraction(s) Primary OutFlow Max=1.34 cfs @ 12.08 hrs HW=575.87' (Free Discharge) L1=CuIVert (Passes 1.34 cfs of 2.63 cfs potential flow) t2=Orifice/Grate (Orifice Controls 1.34 cfs @ 5.00 fps) 3=Sharp-Crested Rectangular Weir( Controls 0.00 cfs) Post Type 1124-hr 7 YR Rainfall=3. D4" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 16 Pond 4P: Pipe Storage Hydrograph 3 N U 2 3 LL 5 A 0 0 1 2 3 4 5 6 7 8 9 10 11 17 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Pond 4P: Pipe Storage Stage -Discharge 0 1 2 3 4 Discharge (efs) ❑ I nftaw ❑ Prmary ❑ Primary Post Type I! 24-hr 7 YR Rainfall=3. D4" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 17 Pond 4P: Pipe Storage Stage -Area -Storage ❑ Storage 0 500 1.000 1,500 2.000 2.500 3,000 3,500 4.000 Storage (cubist -feet) Post Type I! 24-hr 7 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Pape 18 Hydrograph for Pond 4P: Pipe Storage Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 0.00 0.00 0 574.50 0.00 0.50 0.00 0 574.50 0.00 1.00 OM 0 574.50 0.00 1.50 0A0 0 574.50 0.00 2.00 OM 0 574.50 0.00 2.50 0.00 0 574.50 0.00 3.00 0.00 2 574.51 0.00 3.50 0.01 7 574.53 0.00 4.00 0.01 12 574.54 0.01 4.50 0.01 17 574.55 0.01 5.00 0.01 23 574.56 0.01 5.50 0.02 27 574.57 0.02 6.00 0A2 31 574.58 0.02 6.50 0.02 36 574.59 0.02 7.00 0.03 40 574.59 0.03 7.50 0A3 43 574.60 0.03 8.00 0.03 47 574.61 0.03 8.50 0.04 53 574.61 0.04 9.00 O,06 63 574.63 0.05 9.50 0.06 70 574.64 0.06 10.00 0.07 79 574.65 0.07 10.50 0.10 96 574.67 0.09 11.00 0.14 123 574.70 0.13 11.50 0.24 179 574.76 0.20 12.00 3.07 1,659 575.74 1.25 12.50 0.26 871 575.28 0.90 13.00 OA 6 234 574.81 0.28 13.50 OA 2 138 574.72 0.15 14.00 0.10 110 574.69 0.11 14.50 0.08 96 574.67 0.09 15.00 0.08 89 574.66 0.08 15.50 0.07 82 574.65 0.07 16.00 O,06 75 574.64 0.06 16.50 0.05 69 574.64 0.06 17.00 0.05 66 574.63 0.05 17.50 0.05 63 574.63 0.05 18.00 0.05 60 574.62 0.05 18.50 0.04 58 574.62 0.04 19.00 0.04 55 574.62 0.04 19.50 0.04 52 574.61 0.04 20.00 OM 49 574.61 0.03 20.50 0.03 46 574.60 0.03 21.00 OM 45 574.60 0.03 21.50 0.03 45 574.60 0.03 22.00 0.03 44 574.60 0.03 22.50 0.03 44 574.60 0.03 23.00 0.03 43 574.60 0.03 23.50 0.03 42 574.60 0.03 24.00 0.03 42 574.60 0.03 Post Type I! 24-hr 7 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Pape 19 Elevation Primary (feet) (Cfs) 574.50 UO 574.52 0.00 574.54 0A0 574.56 0.01 574.58 0.02 574.60 0.03 574.62 0.04 574.64 0.06 574.66 0.08 574.68 0.10 574.70 0.12 574.72 0.15 574.74 0.17 574.76 0.20 574.78 0.23 574.80 0.26 574.82 0.29 574.84 0.32 574.86 0.35 574.88 0.39 574.90 0.42 574.92 0.45 574.94 0.49 574.96 0.52 574.98 0.56 575.00 0.59 575.02 0.62 575.04 0.65 575.06 0.67 575.08 0.69 575.10 0.71 575.12 0.74 575.14 0.76 575.16 0.78 575.18 0.80 575.20 0.82 575.22 0.84 575.24 0.86 575.26 0.88 575.28 0.90 575.30 0.92 575.32 0.94 575.34 0.95 575.36 0.97 575.38 0.99 575.40 1.00 575.42 1.02 575.44 1.04 575.46 1.05 575.48 1.07 575.50 1.08 575.52 1.10 Stage -Discharge for Pond 4P: Pipe Storage Elevation Primary (feet) {Cfs} 575.54 1.11 575.56 1.13 575.58 1.14 575.60 1.16 575.62 1.17 575.64 1.19 575.66 1.20 575.68 1.21 575.70 1.23 575.72 1.24 575.74 1.25 575.76 1.27 575.78 1.28 575.80 1.29 575.82 1.30 575.84 1.32 575.86 1.33 575.88 1.34 575.90 1.35 575.92 1.39 575.94 1.46 575.98 1.53 575.98 1.62 576.00 1.72 576.02 1.83 576.04 1.95 576A6 2.07 576.08 2.20 576.10 2.34 576.12 2.48 576.14 2.63 576.16 2.78 576.18 2.94 576.20 3.00 576.22 3.02 576.24 3.04 576.26 3.06 576.28 3.08 576.30 3.10 576.32 3.12 576.34 3.14 576.36 3.16 576.38 3.18 576A0 3.20 576A2 3.22 576.44 3.24 576.46 3.25 576.48 3.27 576.50 3.29 576.52 3.31 576.54 3.33 576.56 3.35 Elevation Primary (feet) (Cfs) 576.58 3.37 576.60 3.38 576.62 3.40 576.64 3.42 576.66 3.44 576.68 3.46 576.70 3.48 576.72 3.49 576.74 3.51 576.76 3.53 576.78 3.55 576.80 3.56 576.82 3.58 576.84 3.60 576.86 3.61 576.88 3.63 576.90 3.65 576.92 3.67 576.94 3.68 576.96 3.70 576.98 3.72 577.00 3.73 577.02 3.75 577.04 3.77 577.06 3.78 577.08 3.80 577.10 3.81 577.12 3.83 577.14 3.85 577.16 3.86 577.18 3.88 577.20 3.90 577.22 3.91 577.24 3.93 577.26 3.94 577.28 3.96 577.30 3.97 577.32 3.99 577.34 4.00 577.36 4.02 577.38 4.04 577.40 4.05 577.42 4.07 577.44 4.08 577.46 4.10 577.48 4.11 577.50 4.13 Post Type I! 24-hr 7 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 20 Elevation Storage (feet) (cubic -feet) 574.50 0 574.52 4 574.54 11 574.56 20 574.58 31 574.60 43 574.62 57 574.64 72 574.66 87 574.68 104 574.70 121 574.72 140 574.74 159 574.76 179 574.78 199 574.80 221 574.82 243 574.84 265 574.86 288 574.88 312 574.90 336 574.92 361 574.94 386 574.96 412 574.98 438 575.00 465 575.02 492 575.04 519 575.06 547 575.08 575 575.10 604 575.12 633 575.14 662 575.16 692 575.18 722 575.20 752 575.22 783 575.24 814 575.26 845 575.28 876 575.30 908 575.32 940 575.34 972 575.36 1,005 575.38 1,037 575.40 1,070 575.42 1,103 575.44 1,137 575.46 1,170 575.48 1,204 575.50 1,238 575.52 1,272 Stage -Area -Storage for Pond 4P: Pipe Storage Elevation Storage (feet) (cubic -feet) 575.54 1,306 575.56 1,340 575.58 1,375 575.60 1,409 575.62 1,444 575.64 1,479 575.66 1,514 575.68 1,549 575.70 1,584 575.72 1,620 575.74 1,655 575.76 1,690 575.78 1,726 575.80 1,762 575.82 1,797 575.84 1,833 575.86 1,869 575.88 1,905 575.90 1,941 575.92 1,977 575.94 2,013 575.96 2,049 575.98 2,085 576.00 2,121 576.02 2,157 576.04 2,193 576.06 2,229 576.08 2,265 576.10 2,300 576.12 2,336 576.14 2,372 576.16 2,408 576.18 2,444 576.20 2,480 576.22 2,515 576.24 2,551 576.26 2,586 576.28 2,622 576.30 2,657 576.32 2,692 576.34 2,727 576.36 2,762 576.38 2,797 576.40 2,832 576.42 2,867 576.44 2,901 576.46 2,935 576.48 2,970 576.50 3,004 576.52 3,037 576.54 3,071 576.56 3,105 Elevation Storage (feet) (cubic -feet) 576.58 3,138 576.60 3,171 576.62 3,204 576.64 3,237 576.66 3,269 576.68 3,301 576.70 3,333 576.72 3,365 576.74 3,396 576.76 3,428 576.78 3,458 576.80 3,489 576.82 3,519 576.84 3,549 576.86 3,579 576.88 3,608 576.90 3,637 576.92 3,666 576.94 3,694 576.96 3,722 576.98 3,749 577.00 3,777 577.02 3,803 577.04 3,829 577.06 3,855 577.08 3,880 577.10 3,905 577.12 3,929 577.14 3,953 577.16 3,976 577.18 3,999 577.20 4,020 577.22 4,042 577.24 4,062 577.26 4,082 577.28 4,101 577.30 4,120 577.32 4,137 577.34 4,154 577.36 4,170 577.38 4,184 577.40 4,198 577.42 4,210 577.44 4,221 577.46 4,230 577.48 4,237 577.50 4,241 Post Type I! 24-hr 7 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paue 21 Summary for Link 8L: POA3 Inflow Area = 0.830 ac, 90.36% Impervious, Inflow Depth > 2.56" for 1 YR event Inflow = 1.35 cfs @ 12.07 hrs, Volume= 0.177 of Primary = 1.35 cfs @ 12.07 hrs, Volume= 0.177 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Link 8L: POA3 Hydrograph ■ fnfEaw p Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Post Type I! 24-hr 7 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 22 Hydrograph for Link 8L: POA3 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 0.25 0.00 0.00 0.00 0.50 OM 0.00 0.00 0.75 O.00 0.00 0.00 1.00 OM 0.00 0.00 1.25 0.00 0.00 0.00 1.50 0.00 0.00 0.00 1.75 0.00 OM 0.00 2.00 0.00 0.00 0.00 2.25 MO 0.00 0.00 2.50 MO 0.00 0.00 2.75 OM 0.00 0.00 3.00 0.00 0.00 0.00 3.25 0.00 0.00 0.00 3.50 0.00 0.00 0.00 3.75 OM 0.00 0.00 4.00 0.01 0.00 0.01 4.25 0.01 0.00 0.01 4.50 0.01 0.00 0.01 4.75 0,01 0.00 0.01 5.00 0.01 0.00 0.01 5.25 0.01 0.00 0.01 5.50 0.02 0.00 0.02 5.75 0.02 0.00 0.02 6.00 OM 0.00 0.02 6.25 0.02 0.00 0.02 6.50 OM 0.00 0.02 6.75 OM 0.00 0.02 7.00 0.03 0.00 0.03 7.25 0.03 0.00 0.03 7.50 0.03 0.00 0.03 7.75 0.03 0.00 0.03 8.00 0.03 0.00 0.03 8.25 0.04 0.00 0.04 8.50 0.04 OM 0.04 8.75 0.04 0.00 0.04 9.00 0.05 0.00 0.05 9.25 0.05 0.00 0.05 9.50 0.06 0.00 0.06 9.75 0.06 0.00 0.06 10.00 0.07 0.00 0.07 10.25 OM 0.00 0.08 10.50 0.09 0.00 0.09 10.75 OA O 0.00 0.10 11.00 OA 3 0.00 0.13 11.25 0.15 0.00 0.15 11.50 0.20 0.00 0.20 11.75 0.52 0.00 0.52 12.00 1.28 0.00 1.28 12.25 1.20 0.00 1.20 12.50 0.90 0.00 0.90 12.75 0.53 0.00 0.53 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 13.00 0.28 0.00 0.28 13.25 0.18 0.00 0.18 13.50 0.15 0.00 0.15 13.75 0.12 0.00 OA 2 14.00 0.11 0.00 0.11 14.25 0.10 0.00 0.10 14.50 0.09 0.00 0.09 14.75 0.08 0.00 0.08 15.00 0.08 0.00 0.08 15.25 0.08 0.00 0.08 15.50 0.07 0.00 0.07 15.75 0.07 0.00 0.07 16.00 0.06 0.00 0.06 16.25 0.06 0.00 0.06 16.50 0.06 0.00 0.06 16.75 0.05 0.00 0.05 17.00 0.05 0.00 0.05 17.25 0.05 0.00 0.05 17.50 0.05 0.00 O,05 17.75 0.05 0.00 0.05 18.00 0.05 0.00 0.05 18.25 0.05 0.00 0.05 18.50 0.04 0.00 0.04 18.75 0.04 0.00 0.04 19.00 0.04 0.00 O,04 19.25 0.04 0.00 0.04 19.50 0.04 0.00 0.04 19.75 0.04 0.00 0.04 20.00 0.03 0.00 0.03 20.25 0.03 0.00 0.03 20.50 0.03 0.00 0.03 20.75 0.03 0.00 0.03 21.00 0.03 0.00 0.03 21.25 0.03 0.00 0.03 21.50 0.03 0.00 0.03 21.75 0.03 0.00 0A3 22.00 0.03 0.00 0.03 22.25 0.03 0.00 0.03 22.50 0.03 0.00 0.03 22.75 0.03 0.00 OM 23.00 0.03 0.00 0.03 23.25 0.03 0.00 OM 23.50 0.03 0.00 OM 23.75 0.03 0.00 0.03 24.00 0.03 0.00 0.03 Post Type I! 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Pane 23 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Star -Ind method Subcatchment2S: Post-3Ato POA3 Runoff Area=0.820 ac 91.46% Impervious Runoff Depth>3.22" Tc=6.0 min CN=96 Runoff=4.06 cfs 0.220 of Subcatchment5S: Post-2 to POA2 Runoff Area=0.190 ac 73.68% Impervious Runoff Depth>2.91" Tc=6.0 min CN=93 Runoff=0.89 cfs 0.046 of Subcatchment6S: Post-1 to POA1 Runoff Area=0.490 ac 71.43% Impervious Runoff Depth>2.91" Tc=6.0 min CN=93 Runoff=2.29 cfs 0.119 of Subcatchment7S: Post-313 to POA3 Runoff Area=0.010 ac 0.00% Impervious Runoff Depth>1.78" Tc=6.0 min CN=80 Runoff=0.03 cfs 0.001 of Pond 4P: Pipe Storage Peak Elev=576.10' Storage=2,294 cf Inflow=4.06 cfs 0.220 of Outflow=2.31 cfs 0.219 of Link 8L: POA3 Inflow=2.32 cfs 0.220 of Primary= 2.32 cfs 0.220 of Total Runoff Area = 1.510 ac Runoff Volume = 0.386 of Average Runoff Depth = 3.07" 17.88% Pervious = 0.270 ac 82.12% Impervious = 1.240 ac Post Type 1124-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 24 Summary for Subcatchment 2S: Post-3A to POA3 Runoff = 4.06 cfs @ 11.96 hrs, Volume= 0.220 af, Depths 3.22" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN ❑escriotion 0.750 98 Paved parking, HSG ❑ 0.070 80 >75% Grass cover, Good, HSG D 0.820 96 Weighted Average 0.070 8.54% Pervious Area 0.750 91.46% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 2S: Post-3A to POA3 Hydrograph ❑ Runpff 4 Type II 24-hr 2 YR Rainfall=3.68" 3 I I Runoff Area=0.820 ac Runoff Volume=0.220 of Runoff Depth>3.22" LL 2 Tc=6.0 min � ��l:I: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Post Type I! 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Paae 25 Hydrograph for Subcatchment 2S: Post-3A to POA3 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0A0 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.00 2.75 0.12 0.00 0.00 3.00 0.13 0.00 0.01 3.25 0.14 0.01 0.01 3.50 0.15 0.01 0.01 3.75 0.16 0.01 0.01 4.00 0.18 0.02 0.01 4.25 0.19 0.02 0.02 4.50 0.20 0.03 0.02 4.75 0.22 0.03 0.02 5.00 0.23 0.04 0.02 5.25 0.25 0.05 0.02 5.50 0.26 0.05 0.03 5.75 0.28 0.06 0.03 6.00 0.29 0.07 0.03 6.25 0.31 0.08 0.03 6.50 0.33 0.09 0.03 6.75 0.35 0.10 0.04 7.00 0.36 0.11 0.04 7.25 0.38 0.13 0.04 7.50 0.40 0.14 0.04 7.75 0.42 0.15 0.04 8.00 0.44 0.17 0.05 8.25 0.46 0.18 0.05 8.50 0.49 0.20 0.06 8.75 0.51 0.22 0.07 9.00 0.54 0.24 0.07 9.25 0.57 0.26 0.08 9.50 0.60 0.29 0.08 9.75 0.63 0.31 0.08 10.00 0.67 0.34 0.10 10.25 0.71 0.37 0.11 10.50 0.75 0.41 0.13 10.75 0.80 0.46 0.15 11.00 0.86 0.51 0.18 11.25 0.94 0.58 0.24 11.50 1.04 0.67 0.31 11.75 1.42 1.02 1.39 12.00 2.44 2.00 3.76 12.25 2.60 2.16 0.50 12.50 2.70 2.26 0.32 12.75 2.78 2.33 0.24 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.84 2.40 0.20 13.25 2.89 2.45 OA 7 13.50 2.94 2.49 OA 5 13.75 2.98 2.53 OA 3 14.00 3.02 2.57 OA 2 14.25 3.05 2.60 0.11 14.50 3.08 2.63 0.10 14.75 3.11 2.66 0.10 15.00 3.14 2.69 0.09 15.25 3.17 2.72 0.09 15.50 3.19 2.74 0.08 15.75 3.22 2.77 0.08 16.00 3.24 2.79 0.07 16.25 3.26 2.81 0.07 16.50 3.28 2.83 0.07 16.75 3.30 2.85 0.06 17.00 3.32 2.87 0.06 17.25 3.34 2.88 0.06 17.50 3.36 2.90 0A6 17.75 3.37 2.92 OM 18.00 3.39 2.94 0.05 18.25 3,41 2.95 0.05 18.50 3.42 2.97 0.05 18.75 3.44 2.98 O,05 19.00 3.45 3.00 0.05 19.25 3.46 3.01 0.05 19.50 3.48 3.02 0.04 19.75 3.49 3.04 0.04 20.00 3.50 3.05 0.04 20.25 3.52 3.06 0.04 20.50 3.53 3.07 0.04 20.75 3.54 3.08 0.04 21.00 3.55 3.09 0.04 21.25 3.56 3.11 0.04 21.50 3.57 3.12 0.04 21,75 3.58 3.13 0.04 22.00 3.60 3.14 0.04 22.25 3.61 3.15 0.04 22.50 3.62 3.16 0.04 22.75 3.63 3.17 0.04 23.00 3.64 3.18 0A3 23.25 3.65 3.19 0.03 23.50 3.66 3.20 0.03 23.75 3.67 3.21 0.03 24.00 3.68 3.22 0.03 Post Type 1124-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 26 Summary for Subcatchment 5S: Post-2 to POA2 Runoff = 0.89 cfs @ 11.96 hrs, Volume= 0.046 af, ❑epth> 2.91" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 0.050 80 >75% Grass cover, Good, HSG D 0.140 98 Paved parking, HSG ❑ 0.190 93 Weighted Average 0.050 26.32% Pervious Area 0.140 73.68% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 5S: Post-2 to PQA2 Hydrograph i 1 -I- -I- F _ 1 1 1 -I- 0.9 1 - - - I 1 I- - - - - I I - - q85 -1-_ 0.75 _ 1 _I_ 1 _1_ 1 1 _1-_ 1 1 07 0.85- - 0.6 1 _ I_ 1 _1 _ I_ 1 _ 1 1 _1 _ 1 a 0,45 LL 0.4 0,35 0.3 —J _I_ 1 _1_ L -J 0.25- _ _I_ 1 -1_ L - _I_ 1 -1_ 1 0.2 - _i- 1 -1_ L J _I- 1 -1_ 1 0.15 -1 -L L I I_1-1_ o.1 0.05 1 Type II 24-hr 2 YR Rainfall=3.68" Runoff Area=0.190 a+c Runoff Volume=4.046 of Runoff Depth>2.91" Tc=6.0 min CN=93 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Post Type I! 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Paae 27 Hydrograph for Suhcatchment 5S: Post-2 to PQA2 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 OM 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.00 2.75 0.12 0.00 0.00 3.00 0.13 0.00 0.00 3.25 0.14 0.00 0.00 3.50 0.15 0.00 0.00 3.75 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.25 0.19 0.00 0.00 4.50 0.20 0.00 0.00 4.75 0.22 0.01 0.00 5.00 0.23 0.01 0.00 5.25 0.25 0.01 0.00 5.50 0.26 0.01 0.00 5.75 0.28 0.02 0.00 6.00 0.29 0.02 0.00 6.25 0.31 0.03 0.00 6.50 0.33 0.03 0.00 6.75 0.35 0.04 0.00 7.00 0.36 0.05 0.01 7.25 0.38 0.05 0.01 7.50 0.40 0.06 0.01 7.75 0.42 0.07 0.01 8.00 0.44 0.08 0.01 8.25 0.46 0.09 0.01 8.50 0.49 0.10 0.01 8.75 0.51 0.12 0.01 9.00 0.54 0.13 0.01 9.25 0.57 0,15 0.01 9.50 0.60 0,17 0.01 9.75 0.63 0.19 0.02 10.00 0.67 0.21 0.02 10.25 0.71 0.24 0.02 10.50 0.75 0.27 0.02 10.75 0.80 0.30 0.03 11.00 0.86 0.35 0.04 11.25 0.94 0.41 0.05 11.50 1.04 0.48 0.06 11.75 1.42 0.80 0.29 12.00 2.44 1.72 0.83 12.25 2.60 1.87 0.11 12.50 2.70 1.97 0.07 12.75 2.78 2.04 0.05 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.84 2.10 0.04 13.25 2.89 2.15 0.04 13.50 2.94 2.20 OM 13.75 2.98 2.24 0.03 14.00 3.02 2.27 0.03 14.25 3.05 2.30 0.02 14.50 3.08 2.33 0.02 14.75 3.11 2.36 0A2 15.00 3.14 2.39 0.02 15.25 3.17 2.41 0.02 15.50 3.19 2.44 0.02 15.75 3.22 2.46 0.02 16.00 3.24 2.48 0.02 16.25 3.26 2.50 0.02 16.50 3.28 2.52 0.01 16.75 3.30 2.54 0.01 17.00 3.32 2.66 0.01 17.25 3.34 2.58 0.01 17.50 3.36 2.59 0.01 17.75 3.37 2.61 0.01 18.00 3.39 2.63 0.01 18.25 3,41 2.64 0.01 18.50 3.42 2.66 0.01 18.75 3.44 2.67 0.01 19.00 3.45 2.69 0,01 19.25 3.46 2.70 0.01 19.50 3.48 2.71 0.01 19.75 3.49 2.73 0.01 20.00 3.50 2.74 0.01 20.25 3.52 2.75 0.01 20.50 3.53 2.76 0.01 20.75 3.54 2.77 0.01 21.00 3.55 2.78 0.01 21.25 3.56 2.79 0.01 21.50 3.57 2.81 0.01 21,75 3.58 2.82 0.01 22.00 3.60 2.83 0.01 22.25 3.61 2.84 0.01 22.50 3.62 2.85 0.01 22.75 3.63 2.86 0.01 23.00 3.64 2.87 0,01 23.25 3.65 2.88 0.01 23.50 3.66 2.89 0.01 23.75 3.67 2.90 0.01 24.00 3.68 2.91 0,01 Post Type 1124-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 28 Summary for Subcatchment 6S: Post-1 to POA1 Runoff = 2.29 cfs @ 11.96 hrs, Volume= 0.119 af, ❑epth> 2.91" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 0.140 80 >75% Grass cover, Good, HSG D 0.350 98 Paved parking, HSG ❑ 0.490 93 Weighted Average 0.140 28.57% Pervious Area 0.350 71.43% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ftlsec) (cfs) 6.0 Direct Entry, N 3 0 LL 2 pM 0 Subcatchment 6S: Post-1 to PQA1 Hydrograph Type II 24-hr 2 YR Rainfall=3.68" Runoff Area=0.490 ac Runoff Volume=0.119 of Runoff Depth>2.91" Tc=6.0 min. CN=93 1 2 3 4 5 G 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ RunpFf Post Type I! 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Paae 29 Hydrograph for 5uhcatchment 65: Post -'I to PQA1 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0A0 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.00 2.75 0.12 0.00 0.00 3.00 0.13 0.00 0.00 3.25 0.14 0.00 0.00 3.50 0.15 0.00 0.00 3.75 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.25 0.19 0.00 0.00 4.50 0.20 0.00 0.00 4.75 0.22 0.01 0.00 5.00 0.23 0.01 0.01 5.25 0.25 0.01 0.01 5.50 0.26 0.01 0.01 5.75 0.28 0.02 0.01 6.00 0.29 0.02 0.01 6.25 0.31 0.03 0.01 6.50 0.33 0.03 0.01 6.75 0.35 0.04 0.01 7.00 0.36 0.05 0.01 7.25 0.38 0.05 0.02 7.50 0.40 0.06 0.02 7.75 0.42 0.07 0.02 8.00 0.44 0.08 0.02 8.25 0.46 0.09 0.02 8.50 0.49 0.10 0.02 8.75 0.51 0.12 0.03 9.00 0.54 0.13 0.03 9.25 0.57 0,15 0.03 9.50 0.60 0,17 0.03 9.75 0.63 0.19 0.04 10.00 0.67 0.21 0.04 10.25 0.71 0.24 0.05 10.50 0.75 0.27 0.06 10.75 0.80 0.30 0.07 11.00 0.86 0.35 0.09 11.25 0.94 0.41 0.12 11.50 1.04 0.48 0.16 11.75 1.42 0.80 0.75 12.00 2.44 1.72 2.13 12.25 2.60 1.87 0.29 12.50 2.70 1.97 0.19 12.75 2.78 2.04 0.14 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.84 2.10 0.11 13.25 2.89 2.15 0.10 13.50 2.94 2.20 0.09 13.75 2.98 2.24 0.08 14.00 3.02 2.27 0.07 14.25 3.05 2.30 0.06 14.50 3.08 2.33 0.06 14.75 3.11 2.36 0,06 15.00 3.14 2.39 0.05 15.25 3.17 2.41 0.05 15.50 3.19 2.44 0.05 15.75 3.22 2.46 0.04 16.00 3.24 2.48 0.04 16.25 3.26 2.50 0.04 16.50 3.28 2.52 0.04 16.75 3.30 2.54 0.04 17.00 3.32 2.66 0.04 17.25 3.34 2.58 0.04 17.50 3.36 2.59 OM 17.75 3.37 2.61 0A3 18.00 3.39 2.63 0.03 18.25 3,41 2.64 0.03 18.50 3.42 2.66 0.03 18.75 3.44 2.67 0.03 19.00 3.45 2.69 0.03 19.25 3.46 2.70 0.03 19.50 3.48 2.71 0.03 19.75 3.49 2.73 0.02 20.00 3.50 2.74 0.02 20.25 3.52 2.75 0.02 20.50 3.53 2.76 0.02 20.75 3.54 2.77 0.02 21.00 3.55 2.78 0.02 21.25 3.56 2.79 0.02 21.50 3.57 2.81 0.02 21,75 3.58 2.82 0.02 22.00 3.60 2.83 0.02 22.25 3.61 2.84 0.02 22.50 3.62 2.85 0.02 22.75 3.63 2.86 0.02 23.00 3.64 2.87 0.02 23.25 3.65 2.88 0.02 23.50 3.66 2.89 0.02 23.75 3.67 2.90 OM 24.00 3.68 2.91 OM Post Type I! 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 30 Summary for Subcatchment 7S: Post-3B to PQA3 Runoff = 0.03 cfs @ 11.97 hrs, Volume= 0.001 af, Depths 1.78" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 0.010 80 >75% Grass toyer, Good, HSG D 0.010 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ftlsec) (cfs] 6.0 Direct Entry, Subcatchment 7S: Past-3B to POA3 Hydrograph ❑ Runoff 0.03 Type II 24-hr 0.028 2 YR Rainfall=3.68" 0-02s- 0.024 Runoff Area=0.010 ac 0022 Runoff Volume=0.001 of 0,02 0.01E Runoff Depth>1.78" 01fi L Tc=6.0 min L6° 0.014 CN=80 0.012- 0,01 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Post Type I! 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Paae 31 Hydrograph for Subcatchment 7S: Post-3B to PQA3 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0A0 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.00 2.75 0.12 0.00 0.00 3.00 0.13 0.00 0.00 3.25 0.14 0.00 0.00 3.50 0.15 0.00 0.00 3.75 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.25 0.19 0.00 0.00 4.50 0.20 0.00 0.00 4.75 0.22 0.00 0.00 5.00 0.23 0.00 0.00 5.25 0.25 0.00 0.00 5.50 0.26 0.00 0.00 5.75 0.28 0.00 0.00 6.00 0.29 0.00 0.00 6.25 0.31 0.00 0.00 6.50 0.33 0.00 0.00 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 0.01 0.00 10.00 0.67 0.01 0.00 10.25 0.71 0.02 0.00 10.50 0.75 0.02 0.00 10.75 0.80 0.03 0.00 11.00 0.86 0.05 0.00 11.25 0.94 0.07 0.00 11.50 1.04 0.10 0.00 11.75 1.42 0.25 0.01 12.00 2.44 0.85 0.03 12.25 2.60 0.96 0.00 12.50 2.70 1.03 0.00 12.75 2.78 1.09 0.00 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.84 1.13 0.00 13.25 2.89 1.17 0.00 13.50 2.94 1.21 0A0 13.75 2.98 1.24 0.00 14.00 3.02 1.26 0.00 14.25 3.05 1.29 0.00 14.50 3.08 1.31 0.00 14.75 3.11 1.33 0.00 15.00 3.14 1.36 0.00 15.25 3.17 1.38 0.00 15.50 3.19 1.40 0.00 15.75 3.22 1.41 0.00 16.00 3.24 1.43 0.00 16.25 3.26 1.45 0.00 16.50 3.28 1.46 0.00 16.75 3.30 1.48 0.00 17.00 3.32 1.49 0.00 17.25 3.34 1.51 0A0 17.50 3.36 1.52 0.00 17.75 3.37 1.54 0.00 18.00 3.39 1.55 0.00 18.25 3,41 1.56 0.00 18.50 3.42 1.57 0.00 18.75 3.44 1.59 0.00 19.00 3.45 1.60 0.00 19.25 3.46 1.61 0.00 19.50 3.48 1.62 0A0 19.75 3.49 1.63 0.00 20.00 3.50 1.64 0.00 20.25 3.52 1.65 0.00 20.50 3.53 1.66 0.00 20.75 3.54 1.67 0.00 21.00 3.55 1.68 0.00 21.25 3.56 1.69 0.00 21.50 3.57 1.69 0.00 21,75 3.58 1,70 0.00 22.00 3.60 1.71 0.00 22.25 3.61 1.72 0.00 22.50 3.62 1.73 OM 22.75 3.63 1.74 0.00 23.00 3.64 1.75 0A0 23.25 3.65 1.76 0.00 23.50 3.66 1.76 0.00 23.75 3.67 1.77 OM 24.00 3.68 1.78 0.00 Post Type I! 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 32 Summary for Pond 4P: Pipe Storage Inflow Area = 0.820 ac, 91.46% Impervious, Inflow Depth > 3.22" for 2 YR event Inflow = 4.06 cfs @ 11.96 hrs, Volume= 0.220 of Outflow = 2.31 cfs @ 12.06 hrs, Volume= 0.219 af, Atten= 43%, Lag= 5.9 min Primary = 2.31 cfs @ 12.06 hrs, Volume= 0.219 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 576.10' @ 12.06 hrs Surf.Area= 1,796 sf Storage= 2,294 cf Plug -Flow detention time=18.5 min calculated for 0.219 of (99% of inflow) Center -of -Mass det. time= 15.2 min ( 781.2 - 766.0 ) Volume Invert Avail.Storage Storage Description #1 574.50' 4,241 cf 36.0" Round Pipe Storage L= 600.0' Device Routing Invert Outlet Devices #1 Primary 574.50' 12.0" Round Culvert L= 75.0' CMP, projecting, no headwall, Ke= 0.900 Inlet/ Outlet Invert= 574.50'/ 573-75' S= 0.0100 '1' Cc= 0.900 n= 0.018 Corrugated PE, corrugated interior, Flow Area= 0.79 sf #2 Device 1 574.50' 7.0" Vert. Orifice/Grate C= 0.600 #3 Device 1 575.90' 3.0' long Sharp -Crested Rectangular Weir 2 End Contraction(s) Primary OutFlow Max=2.23 cfs @ 12.06 hrs HW=576.08' (Free Discharge) L1=CuIVert (Passes 2.23 cfs of 2.87 cfs. potential flow) t2=Orifice/Grate (Orifice Controls 1.46 cfs @ 5.47 fps) 3=Sharp-Crested Rectangular Weir(Weir Controls 0.77 cfs @ 1.40 fps) Post Type 1124-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 33 5 A Pond 4P: Pipe Storage Hydrograph 4 3 1 0 0 1 2 3 4 5 6 7 8 9 10 11 17 13 14 15 16 17 18 19 27 21 22 23 24 Time (hours) Pond 4P: Pipe Storage Stage -Discharge 0 1 2 3 4 Discharge (efs) ❑ I nflaw ❑ Primary ❑ Primary Post Type I! 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 34 Pond 4P: Pipe Storage Stage -Area -Storage ❑ Storage 0 500 1.000 1,500 2.000 2.500 3,000 3,500 4.000 Storage (cubist -feet) Post Type I! 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 35 Hydrograph for Pond 4P: Pipe Storage Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 0.00 0.00 0 574.50 0.00 0.50 0.00 0 574.50 0.00 1.00 0A0 0 574.50 0.00 1.50 0A0 0 574.50 0.00 2.00 OM 0 574.50 0.00 2.50 0.00 2 574.51 0.00 3.00 0.01 7 574.53 0.00 3.50 0.01 14 574.55 0.01 4.00 0.01 21 574.56 0.01 4.50 OM 26 574.57 0.01 5.00 OM 31 574.58 0.02 5.50 OM 36 574.59 0.02 6.00 0.03 41 574.60 0.03 6.50 0.03 46 574.60 0.03 7.00 0.04 50 574.61 0.04 7.50 0.04 54 574.62 0.04 8.00 0.05 59 574.62 0.04 8.50 0.06 66 574.63 0.05 9.00 O,07 77 574.65 0.07 9.50 0.08 85 574.66 0.08 10.00 0.10 95 574.67 0.09 10.50 0.13 116 574.69 0.11 11.00 0.18 149 574.73 0.16 11.50 0.31 217 574.80 0.25 12.00 3.76 2,093 575.98 1.65 12.50 0.32 1,098 575.42 1.02 13.00 0.20 299 574.87 0.37 13.50 OA 5 163 574.74 0.18 14.00 0.12 127 574.71 0.13 14.50 0.10 111 574.69 0.11 15.00 0.09 102 574.68 0.10 15.50 0.08 94 574.67 0.09 16.00 0.07 86 574.66 0.08 16.50 0.07 80 574.65 0.07 17.00 0.06 76 574.65 0.06 17.50 0.06 73 574.64 0.06 18.00 0.05 69 574.64 0.06 18.50 0.05 fib 574.63 0.05 19.00 0.05 63 574.63 0.05 19.50 0.04 59 574.62 0.05 20.00 OA4 56 574.62 0.04 20.50 0.04 54 574.61 0.04 21.00 OA4 52 574.61 0.04 21.50 0.04 52 574.61 0.04 22.00 0A4 51 574.61 0.04 22.50 0.04 50 574.61 0.04 23.00 0.03 49 574.61 0.04 23.50 0.03 49 574.61 0.03 24.00 0.03 48 574.61 0.03 Post Type I! 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paue 36 Elevation Primary (feet) (Cfs) 574.50 0.00 574.52 0.00 574.54 0A0 574.56 0.01 574.58 0.02 574.60 0.03 574.62 0.04 574.64 0.06 574.66 0.08 574.68 0.10 574.70 0.12 574.72 0.15 574.74 0.17 574.76 0.20 574.78 0.23 574.80 0.26 574.82 0.29 574.84 0.32 574.86 0.35 574.88 0.39 574.90 0.42 574.92 0.45 574.94 0.49 574.96 0.52 574.98 0.56 575.00 0.59 575.02 0.62 575.04 0.65 575.06 0.67 575.08 0.69 575.10 0.71 575.12 0.74 575.14 0.76 575.16 0.78 575.18 0.80 575.20 0.82 575.22 0.84 575.24 0.86 575.26 0.88 575.28 0.90 575.30 0.92 575.32 0.94 575.34 0.95 575.36 0.97 575.38 0.99 575.40 1.00 575.42 1.02 575.44 1.04 575.46 1.05 575.48 1.07 575.50 1.08 575.52 1.10 Stage -Discharge for Pond 4P: Pipe Storage Elevation Primary (feet) {Cfs} 575.54 1.11 575.56 1.13 575.58 1.14 575.60 1.16 575.62 1.17 575.64 1.19 575.66 1.20 575.68 1.21 575.70 1.23 575.72 1.24 575.74 1.25 575.76 1.27 575.78 1.28 575.80 1.29 575.82 1.30 575.84 1.32 575.86 1.33 575.88 1.34 575.90 1.35 575.92 1.39 575.94 1.46 575.98 1.53 575.98 1.62 576.00 1.72 576.02 1.83 576.04 1.95 576A6 2.07 576.08 2.20 576.10 2.34 576.12 2.48 576.14 2.63 576.16 2.78 576.18 2.94 576.20 3.00 576.22 3.02 576.24 3.04 576.26 3.06 576.28 3.08 576.30 3.10 576.32 3.12 576.34 3.14 576.36 3.16 576.38 3.18 576A0 3.20 576A2 3.22 576.44 3.24 576.46 3.25 576.48 3.27 576.50 3.29 576.52 3.31 576.54 3.33 576.56 3.35 Elevation Primary (feet) (Cfs) 576.58 3.37 576.60 3.38 576.62 3.40 576.64 3.42 576.66 3.44 576.68 3.46 576.70 3.48 576.72 3.49 576.74 3.51 576.76 3.53 576.78 3.55 576.80 3.56 576.82 3.58 576.84 3.60 576.86 3.61 576.88 3.63 576.90 3.65 576.92 3.67 576.94 3.68 576.96 3.70 576.98 3.72 577.00 3.73 577.02 3.75 577.04 3.77 577.06 3.78 577.08 3.80 577.10 3.81 577.12 3.83 577.14 3.85 577.16 3.86 577.18 3.88 577.20 3.90 577.22 3.91 577.24 3.93 577.26 3.94 577.28 3.96 577.30 3.97 577.32 3.99 577.34 4.00 577.36 4.02 577.38 4.04 577.40 4.05 577.42 4.07 577.44 4.08 577.46 4.10 577.48 4.11 577.50 4.13 Post Type I! 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paue 37 Elevation Storage (feet) (cubic -feet) 574.50 0 574.52 4 574.54 11 574.56 20 574.58 31 574.60 43 574.62 57 574.64 72 574.66 87 574.68 104 574.70 121 574.72 140 574.74 159 574.76 179 574.78 199 574.80 221 574.82 243 574.84 265 574.86 288 574.88 312 574.90 336 574.92 361 574.94 386 574.96 412 574.98 438 575.00 465 575.02 492 575.04 519 575.06 547 575.08 575 575.10 604 575.12 633 575.14 662 575.16 692 575.18 722 575.20 752 575.22 783 575.24 814 575.26 845 575.28 876 575.30 908 575.32 940 575.34 972 575.36 1,005 575.38 1,037 575.40 1,070 575.42 1,103 575.44 1,137 575.46 1,170 575.48 1,204 575.50 1,238 575.52 1,272 Stage -Area -Storage for Pond 4P: Pipe Storage Elevation Storage (feet) (cubic -feet) 575.54 1,306 575.56 1,340 575.58 1,375 575.60 1,409 575.62 1,444 575.64 1,479 575.66 1,514 575.68 1,549 575.70 1,584 575.72 1,620 575.74 1,655 575.76 1,690 575.78 1,726 575.80 1,762 575.82 1,797 575.84 1,833 575.86 1,869 575.88 1,905 575.90 1,941 575.92 1,977 575.94 2,013 575.96 2,049 575.98 2,085 576.00 2,121 576.02 2,157 576.04 2,193 576.06 2,229 576.08 2,265 576.10 2,300 576.12 2,336 576.14 2,372 576.16 2,408 576.18 2,444 576.20 2,480 576.22 2,515 576.24 2,551 576.26 2,586 576.28 2,622 576.30 2,657 576.32 2,692 576.34 2,727 576.36 2,762 576.38 2,797 576.40 2,832 576.42 2,867 576.44 2,901 576.46 2,935 576.48 2,970 576.50 3,004 576.52 3,037 576.54 3,071 576.56 3,105 Elevation Storage (feet) (cubic -feet) 576.58 3,138 576.60 3,171 576.62 3,204 576.64 3,237 576.66 3,269 576.68 3,301 576.70 3,333 576.72 3,365 576.74 3,396 576.76 3,428 576.78 3,458 576.80 3,489 576.82 3,519 576.84 3,549 576.86 3,579 576.88 3,608 576.90 3,637 576.92 3,666 576.94 3,694 576.96 3,722 576.98 3,749 577.00 3,777 577.02 3,803 577.04 3,829 577.06 3,855 577.08 3,880 577.10 3,905 577.12 3,929 577.14 3,953 577.16 3,976 577.18 3,999 577.20 4,020 577.22 4,042 577.24 4,062 577.26 4,082 577.28 4,101 577.30 4,120 577.32 4,137 577.34 4,154 577.36 4,170 577.38 4,184 577.40 4,198 577.42 4,210 577.44 4,221 577.46 4,230 577.48 4,237 577.50 4,241 Post Type I! 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paue 38 Summary for Link 8L: POA3 Inflow Area = 0.830 ac, 90.36% Impervious, Inflow Depth > 3.19" for 2 YR event Inflow = 2.32 cfs @ 12.06 hrs, Volume= 0.220 of Primary = 2.32 cfs @ 12.06 hrs, Volume= 0.220 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Link 8L: POA3 Hydrograph ■ fnfEaw p Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Post Type I! 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paue 39 Hydrograph for Link 8L: POA3 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 0.25 0.00 0.00 0.00 0.50 OM 0.00 0.00 0.75 O.00 0.00 0.00 1.00 OM 0.00 0.00 1.25 0.00 0.00 0.00 1.50 0.00 0.00 0.00 1.75 0.00 OM 0.00 2.00 0.00 0.00 0.00 2.25 MO 0.00 0.00 2.50 MO 0.00 0.00 2.75 OM 0.00 0.00 3.00 0.00 0.00 0.00 3.25 MO 0.00 0.00 3.50 0.01 0.00 0.01 3.75 0.01 0.00 0.01 4.00 0.01 0.00 0.01 4.25 0.01 0.00 0.01 4.50 0.01 0.00 0.01 4.75 OM 0.00 0.02 5.00 0.02 0.00 0.02 5.25 0.02 0.00 0.02 5.50 0.02 0.00 0.02 5.75 0.03 0.00 0.03 6.00 OM 0.00 0.03 6.25 0.03 0.00 0.03 6.50 OM 0.00 0.03 6.75 OM 0.00 0.03 7.00 0.04 0.00 0.04 7.25 0.04 0.00 0.04 7.50 0.04 0.00 0.04 7.75 0.04 0.00 0.04 8.00 O,04 0.00 0.04 8.25 0.05 0.00 0.05 8.50 0.05 0A0 0.05 8.75 O,06 0.00 0.06 9.00 0.07 0.00 0.07 9.25 0.07 0.00 0.07 9.50 OM 0.00 0.08 9.75 0.08 0.00 0.08 10.00 0,09 0.00 0.09 10.25 OA O 0.00 0.10 10.50 OA 2 0.00 0.12 10.75 OA 3 0.00 0.13 11.00 OA 6 0.00 0.16 11.25 0.20 0.00 0.20 11.50 0.25 0.00 0.25 11.75 0.64 0.00 0.64 12.00 1.68 0.00 1.68 12.25 1.30 0.00 1.30 12.50 1.02 0.00 1.02 12.75 0,69 0.00 0.69 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 13.00 0.37 0.00 0.37 13.25 0.23 0.00 0.23 13.50 0.18 0.00 0.18 13.75 0.15 0.00 OA 5 14.00 0.13 0.00 0.13 14.25 0.12 0.00 0.12 14.50 0.11 0.00 0.11 14.75 0.10 0.00 OA O 15.00 0.10 0.00 OA O 15.25 0.09 0.00 0.09 15.50 0.09 0.00 0.09 15.75 0.08 0.00 0.08 16.00 0.08 0.00 0.08 16.25 0.07 0.00 0.07 16.50 0.07 0.00 0.07 16.75 0.07 0.00 0.07 17.00 0.06 0.00 0.06 17.25 0.06 0.00 0.06 17.50 0.06 0.00 0,06 17.75 0.06 0.00 0.06 18.00 0.06 0.00 0.06 18.25 0.06 0.00 0.06 18.50 0.05 0.00 0.05 18.75 0.05 0.00 0.05 19.00 0.05 0.00 0.05 19.25 0.05 0.00 0.05 19.50 0.05 0.00 OA5 19.75 0.04 0.00 0.04 20.00 0.04 0.00 0.04 20.25 0.04 0.00 0.04 20.50 0.04 0.00 0.04 20.75 0.04 0.00 0.04 21.00 0.04 0.00 0.04 21.25 0.04 0.00 0.04 21.50 0.04 0.00 0.04 21.75 0.04 0.00 O,04 22.00 0.04 0.00 0.04 22.25 0.04 0.00 0.04 22.50 0.04 0.00 0.04 22.75 0.04 0.00 0.04 23.00 0.04 0.00 0.04 23.25 0.04 0.00 OA4 23.50 0.03 0.00 OM 23.75 0.03 0.00 0.03 24.00 0.03 0.00 0.03 Post Type it 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2i412020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Pace 40 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Star -Ind method Subcatchment2S: Post-3Ato POA3 Runoff Area=0.820 ac 91.46% Impervious Runoff Depth>5.10" Tc=6.0 min CN=96 Runoff=6.25 cfs 0.348 of Subcatchment5S: Post-2 to POA2 Runoff Area=0.190 ac 73.68% Impervious Runoff Depth>4.75" Tc=6.0 min CN=93 Runoff=1.41 cfs 0.075 of Subcatchment6S: Post-1 to POA1 Runoff Area=0.490 ac 71.43% Impervious Runoff Depth>4.75" Tc=6.0 min CN=93 Runoff=3.62 cfs 0.194 of Subcatchment7S: Post-313 to POA3 Runoff Area=0.010 ac 0.00% Impervious Runoff Depth>3.39" Tc=6.0 min CN=80 Runoff=0.06 cfs 0.003 of Pond 4P: Pipe Storage Peak Elev=576.70' Storage=3,339 cf Inflow=6.25 cfs 0.348 of Outflow=3.48 cfs 0.347 of Link 8L: POA3 Inflow=3.51 cfs 0.350 of Primary= 3.51 cfs 0.350 of Total Runoff Area = 1.510 ac Runoff Volume = 0.620 of Average Runoff Depth = 4.93" 17.88% Pervious = 0.270 ac 82.12% Impervious = 1.240 ac Post Type 1t 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paue 41 Summary for Subcatchment 2S: Post-3A to POA3 Runoff = 6.25 cfs @ 11.96 hrs, Volume= 0.348 af, Depths 5.10" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN ❑escriotion 0.750 98 Paved parking, HSG ❑ 0.070 80 >75% Grass cover, Good, HSG D 0.820 96 Weighted Average 0.070 8.54% Pervious Area 0.750 91.46% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 2S: Post-3A to POA3 Hydrograph 7 6 Type II 24-hr 10 YR Rainfall=5.57" 5 Runoff Area=0.820 ac Runoff Volume=0.348 of 4 Runoff Depth>5.10" .2 3� it Tc=6.0 mir zl I U C"-96 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Post Type it 24-hr 70 YR Rainfall=5.57" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Page 42 Hydrograph for Subcatchment 2S: Post-3A to POA3 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0A0 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.00 0.00 2.00 0.12 0.00 0.01 2.25 0.14 0.01 0.01 2.50 0.16 0.01 0.01 2.75 0.17 0.02 0.02 3.00 0.19 0.02 0.02 3.25 0.21 0.03 0.02 3.50 0.23 0.04 0.03 3.75 0.25 0.05 0.03 4.00 0.27 0.06 0.03 4.25 0.29 0.07 0.04 4.50 0.31 0.08 0.04 4.75 0.33 0.09 0.04 5.00 0,35 0,10 0.05 5.25 0.37 0,12 0.05 5.50 0.40 0.13 0.05 5.75 0.42 0.15 0.05 6.00 0.45 0.17 0.06 6.25 0.47 0.19 0.06 6.50 0.50 0.21 0.06 6.75 0.52 0.23 0.07 7.00 0.55 0.25 0.07 7.25 0.58 0.27 0.07 7.50 0.61 0.29 0.08 7.75 0.64 0.32 0.08 8.00 0.67 0.34 0.08 8.25 0.70 0.37 0.09 8.50 0.74 0.40 0.10 8.75 0.78 0.43 0.11 9.00 0.82 0.47 0.12 9.25 0.86 0.51 0.13 9.50 0.91 0.55 0.13 9.75 0.96 0.59 0.14 10.00 1.01 0.64 0.16 10.25 1.07 0.69 0.18 10.50 1.14 0.75 0.21 10.75 1.22 0.83 0.25 11.00 1.31 0.91 0.29 11.25 1.43 1.02 0.38 11.50 1.58 1.17 0.49 11.75 2.16 1.73 2.19 12.00 3.69 3.24 5.78 12.25 3.93 3.47 0.77 12.50 4.09 3.63 0.49 12.75 4.21 3.74 0.36 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 4.30 3.84 0.30 13.25 4.38 3.92 0.26 13.50 4.45 3.99 0.23 13.75 4.51 4.05 0.20 14.00 4.57 4.10 0.18 14.25 4.62 4.15 0.16 14.50 4.67 4.20 0.16 14.75 4.71 4.25 0.15 15.00 4.75 4.29 0.14 15.25 4.79 4.33 0.13 15.50 4.83 4.37 0.12 15.75 4.87 4.40 0.12 16.00 4.90 4.43 0.11 16.25 4.93 4.47 0.10 16.50 4.96 4.50 0.10 16.75 4.99 4.53 0.10 17.00 5.02 4.56 0.09 17.25 5.05 4.58 0A9 17.50 5.08 4.61 0.09 17.75 5.10 4.64 0.09 18.00 5.13 4.66 0.08 18.25 5.15 4.69 0.08 18.50 5.18 4.71 0.08 18.75 5.20 4.73 0.07 19.00 5.22 4.75 0.07 19.25 5.24 4.78 0.07 19.50 5.26 4.80 OA7 19.75 5.28 4.82 0.06 20.00 5.30 4.83 0.06 20.25 5.32 4.85 0.06 20.50 5.34 4.87 0.06 20.75 5.36 4.89 0.06 21.00 5.37 4.90 0.06 21.25 5.39 4.92 0.06 21.50 5.41 4.94 0.06 21,75 5.43 4.96 0.06 22.00 5.44 4.97 0.06 22.25 5,46 4.99 0.05 22.50 5.47 5.00 0.05 22.75 5.49 5.02 0.05 23.00 5.51 5.04 OA5 23.25 5.52 5.05 0.05 23.50 5.54 5.07 0.05 23.75 5.55 5.08 0.05 24.00 5.57 5.10 0.05 Post Type 11 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 43 Summary for Subcatchment 5S: Post-2 to POA2 Runoff = 1.41 cfs @ 11.96 hrs, Volume= 0.075 af, ❑epth> 4.75" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Description 0.050 80 >75% Grass cover, Good, HSG D 0.140 98 Paved parking, HSG ❑ 0.190 93 Weighted Average 0.050 26.32% Pervious Area 0.140 73.68% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ft/sec) (cfs) 6.0 Direct Entry, N 3 0 LL pk Subcatchment 5S: Post-2 to PQA2 Hydrograph Type II 24-hr 10 YR Rainfall=5.57" Runoff Area=0.190 ac Runoff Volume=0.075 of Runoff Depth>4.75" Tc=6.0 min CN=93 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) 0 RungFf Post Type it 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Page 44 Hydrograph for Suhcatchment 5S: Post-2 to PQA2 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0A0 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.00 0.00 2.00 0.12 0.00 0.00 2.25 0.14 0.00 0.00 2.50 0.16 0.00 0.00 2.75 0.17 0.00 0.00 3.00 0.19 0.00 0.00 3.25 0.21 0.00 0.00 3.50 0.23 0.01 0.00 3.75 0.25 0.01 0.00 4.00 0.27 0.02 0.00 4.25 0.29 0.02 0.00 4.50 0.31 0.03 0.00 4.75 0.33 0.03 0.01 5.00 0,35 0.04 0.01 5.25 0.37 0.05 0.01 5.50 0.40 0.06 0.01 5.75 0.42 0.07 0.01 6.00 0.45 0.08 0.01 6.25 0.47 0.10 0.01 6.50 0.50 0.11 0.01 6.75 0.52 0.12 0.01 7.00 0.55 0.14 0.01 7.25 0.58 0.16 0.01 7.50 0.61 0.17 0.01 7.75 0.64 0.19 0.01 8.00 0.67 0.21 0.01 8.25 0.70 0.23 0.02 8.50 0.74 0.26 0.02 8.75 0.78 0.28 0.02 9.00 0.82 0.31 0.02 9.25 0.86 0,35 0.02 9.50 0.91 0.38 0.03 9.75 0.96 0.42 0.03 10.00 1.01 0.46 0.03 10.25 1.07 0.50 0.04 10.50 1.14 0.56 0.04 10.75 1.22 0.62 0.05 11.00 1.31 0.70 0.06 11.25 1.43 0.80 0.08 11.50 1.58 0.93 0.10 11.75 2.16 1.46 0.48 12.00 3.69 2.92 1.30 12.25 3.93 3.15 0.17 12.50 4.09 3.31 0.11 12.75 4.21 3.42 0.08 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 4.30 3.51 0.07 13.25 4.38 3.59 0.06 13.50 4.45 3.66 0.05 13.75 4.51 3.72 0.05 14.00 4.57 3.77 0.04 14.25 4.62 3.82 0.04 14.50 4.67 3.87 0.04 14.75 4.71 3.91 OM 15.00 4.75 3.96 0.03 15.25 4.79 4.00 0.03 15.50 4.83 4.03 0.03 15.75 4.87 4.07 0.03 16.00 4.90 4.10 0.02 16.25 4.93 4.13 0.02 16.50 4.96 4.16 0.02 16.75 4.99 4.19 0.02 17.00 5.02 4.22 0.02 17.25 5.05 4.25 0.02 17.50 5.08 4.27 0.02 17.75 5.10 4.30 0.02 18.00 5.13 4.33 0.02 18.25 5.15 4.35 0.02 18.50 5.18 4.37 0.02 18.75 5.20 4.40 OM 19.00 5.22 4.42 0.02 19.25 5.24 4.44 0.02 19.50 5.26 4.46 0.02 19.75 5.28 4.48 0.01 20.00 5.30 4.50 0.01 20.25 5.32 4.51 0.01 20.50 5.34 4.53 0.01 20.75 5.36 4.55 0.01 21.00 5.37 4.57 0.01 21.25 5.39 4.58 0.01 21.50 5.41 4.60 0.01 21,75 5.43 4.62 0.01 22.00 5.44 4.63 0.01 22.25 5,46 4.65 0.01 22.50 5.47 4.66 0.01 22.75 5.49 4.68 0.01 23.00 5.51 4.70 0,01 23.25 5.52 4.71 0.01 23.50 5.54 4.73 0.01 23.75 5.55 4.74 0.01 24.00 5.57 4.76 0,01 Post Type it 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2i412020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Page 45 Summary for Subcatchment 6S: Past-1 to POA1 Runoff = 3.62 cfs @ 11.96 hrs, Volume= 0.194 af, Depths 4.75" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Descrli)tlon 0.140 80 >75% Grass cover, Good, HSG D 0.350 98 Paved parking, HSG ❑ 0.490 93 Weighted Average 0.140 28.57% Pervious Area 0.350 71.43% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ft/sec) (Cfs) 6.0 Direct Entry, Subcatchment 6S: Post-1 to POA1 Hydrograph 4 r I I 0 Runoff Type II 24-hr 10 YR Rainfall=5.57" 3 Runoff Area=0.490 ac Runoff Val ume=0.194 of 2 Runoff Depth>4.75" o Tc=6.0 min CN=93 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Post Type it 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Page 46 Hydrograph for 5uhcatchment 65: Post -'I to PQAl Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0A0 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.00 0.00 2.00 0.12 0.00 0.00 2.25 0.14 0.00 0.00 2.50 0.16 0.00 0.00 2.75 0.17 0.00 0.00 3.00 0.19 0.00 0.00 3.25 0.21 0.00 0.00 3.50 0.23 0.01 0.01 3.75 0.25 0.01 0.01 4.00 0.27 0.02 0.01 4.25 0.29 0.02 0.01 4.50 0.31 0.03 0.01 4.75 0.33 0.03 0.01 5.00 0,35 0.04 0.02 5.25 0.37 0.05 0.02 5.50 0.40 0.06 0.02 5.75 0.42 0.07 0.02 6.00 0.45 0.08 0.02 6.25 0.47 0.10 0.03 6.50 0.50 0.11 0.03 6.75 0.52 0.12 0.03 7.00 0.55 0.14 0.03 7.25 0.58 0.16 0.03 7.50 0.61 0.17 0.03 7.75 0.64 0.19 0.04 8.00 0.67 0.21 0.04 8.25 0.70 0.23 0.04 8.50 0.74 0.26 0.05 8.75 0.78 0.28 0.05 9.00 0.82 0.31 0.06 9.25 0.86 0,35 0.06 9.50 0.91 0.38 0.07 9.75 0.96 0.42 0.07 10.00 1.01 0.46 0.08 10.25 1.07 0.50 0.10 10.50 1.14 0.56 0.11 10.75 1.22 0.62 0.13 11.00 1.31 0.70 0.16 11.25 1.43 0.80 0.21 11.50 1.58 0.93 0.27 11.75 2.16 1.46 1.23 12.00 3.69 2.92 3.36 12.25 3.93 3.15 0.45 12.50 4.09 3.31 0.29 12.75 4.21 3.42 0.21 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 4.30 3.51 0.18 13.25 4.38 3.59 OA 5 13.50 4.45 3.66 0.13 13.75 4.51 3.72 OA 2 14.00 4.57 3.77 0.10 14.25 4.62 3.82 0.10 14.50 4.67 3.87 0.09 14.75 4.71 3.91 OA9 15.00 4.75 3.96 0.08 15.25 4.79 4.00 0.08 15.50 4.83 4.03 0.07 15.75 4.87 4.07 0,07 16.00 4.90 4.10 0.06 16.25 4.93 4.13 0.06 16.50 4.96 4.16 0.06 16.75 4.99 4.19 0.06 17.00 5.02 4.22 0.06 17.25 5.05 4.25 0.05 17.50 5.08 4.27 0.05 17.75 5.10 4.30 0.05 18.00 5.13 4.33 0.05 18.25 5.15 4.35 0.05 18.50 5.18 4.37 0.05 18.75 5.20 4.40 0.04 19.00 5.22 4.42 0.04 19.25 5.24 4.44 0.04 19.50 5.26 4.46 0.04 19.75 5.28 4.48 0.04 20.00 5.30 4.50 0.04 20.25 5.32 4.51 0.03 20.50 5.34 4.53 0.03 20.75 5.36 4.55 0.03 21.00 5.37 4.57 0.03 21.25 5.39 4.58 0.03 21.50 5.41 4.60 0.03 21,75 5.43 4.62 0.03 22.00 5.44 4.63 0.03 22.25 5,46 4.65 0.03 22.50 5.47 4.66 0.03 22.75 5.49 4.68 0.03 23.00 5.51 4.70 OM 23.25 5.52 4.71 0.03 23.50 5.54 4.73 0.03 23.75 5.55 4.74 0.03 24.00 5.57 4.76 0.03 Post Type 1t 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 47 Summary for Subcatchment 7S: Post-3B to POA3 Runoff = 0.06 cfs @ 11.97 hrs, Volume= 0.003 af, ❑epth> 3.39" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Description 0.010 80 >75% Grass toyer, Good, HSG D 0.010 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ftlsec) (cfs) 5.0 Direct Entry, Subcatchment 7S: Post-3B to PQA3 Hydrograph D Runoff 0.055 Type 1I 24-hr 0.05 10 YR Rainfall=5.57" 0.045 Runoff Area=0.010 ac 0.04. Runoff Volume=0.003 of 0-035 Runoff aepth>3.39" o a-oa Tc=6t0-min - - 0.025 I cN=80 0.02 1 1 1 O.o15 i 0.01 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Post Type it 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Page 48 Hydrograph for Subcatchment 7S: Post-3B to PQA3 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0A0 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.00 0.00 2.00 0.12 0.00 0.00 2.25 0.14 0.00 0.00 2.50 0.16 0.00 0.00 2.75 0.17 0.00 0.00 3.00 0.19 0.00 0.00 3.25 0.21 0.00 0.00 3.50 0.23 0.00 0.00 3.75 0.25 0.00 0.00 4.00 0.27 0.00 0.00 4.25 0.29 0.00 0.00 4.50 0.31 0.00 0.00 4.75 0.33 0.00 0.00 5.00 0,35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.45 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.01 0.00 8.00 0.67 0.01 0.00 8.25 0.70 0.01 0.00 8.50 0.74 0.02 0.00 8.75 0.78 0.03 0.00 9.00 0.82 0.04 0.00 9.25 0.86 0.05 0.00 9.50 0.91 0.06 0.00 9.75 0.96 0.07 0.00 10.00 1.01 0.09 0.00 10.25 1.07 0.11 0.00 10.50 1.14 0.13 0.00 10.75 1.22 0.16 0.00 11.00 1.31 0.20 0.00 11.25 1.43 0.25 0.00 11.50 1.58 0.32 0.00 11.75 2.16 0.66 0.02 12.00 3.69 1.79 0.05 12.25 3.93 1.99 0.01 12.50 4.09 2.12 0.01 12.75 4.21 2.21 0.00 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 4.30 2.29 0.00 13.25 4.38 2.36 0.00 13.50 4.45 2.42 0A0 13.75 4.51 2.47 0.00 14.00 4.57 2.52 0.00 14.25 4.62 2.56 0.00 14.50 4.67 2.60 0.00 14.75 4.71 2.64 0.00 15.00 4.75 2.68 0.00 15.25 4.79 2.71 0.00 15.50 4.83 2.75 0.00 15.75 4.87 2.78 0.00 16.00 4.90 2.81 0.00 16.25 4.93 2.83 0.00 16.50 4.96 2.86 0.00 16.75 4.99 2.89 0.00 17.00 5.02 2.91 0.00 17.25 5.05 2.94 0A0 17.50 5.08 2.96 0.00 17.75 5.10 2.98 0.00 18.00 5.13 3.01 0.00 18.25 5.15 3.03 0.00 18.50 5.18 3.05 0.00 18.75 5.20 3.07 OM 19.00 5.22 3.09 0.00 19.25 5.24 3.11 0.00 19.50 5.26 3.13 OM 19.75 5.28 3.14 0.00 20.00 5.30 3.16 0.00 20.25 5.32 3.17 0.00 20.50 5.34 3.19 0.00 20.75 5.36 3.21 0.00 21.00 5.37 3.22 0.00 21.25 5.39 3.24 0.00 21.50 5.41 3.25 0.00 21,75 5.43 3.27 0.00 22.00 5.44 3.28 0.00 22.25 5,46 3.30 0.00 22.50 5.47 3.31 OM 22.75 5.49 3.33 0.00 23.00 5.51 3.34 OM 23.25 5.52 3.35 0.00 23.50 5.54 3.37 0.00 23.75 5.55 3.38 OM 24.00 5.57 3.40 0.00 Post Type it 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2i412020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 49 Summary for Pond 4P: Pipe Storage Inflow Area = 0.820 ac, 91.46% Impervious, Inflow Depth > 5.10" for 10 YR event Inflow = 6.25 cfs @ 11.96 hrs, Volume= 0.348 of Outflow = 3.48 cfs @ 12.06 hrs, Volume= 0.347 af, Atten= 44%, Lag= 5.7 min Primary = 3.48 cfs @ 12.06 hrs, Volume= 0.347 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 576.70' @ 12.06 hrs Surf.Area= 1,590 sf Storage= 3,339 cf Plug -Flow detention time=17.0 min calculated for 0.347 of (100% of inflow) Center -of -Mass det. time= 14.1 min ( 769.6 - 755.5 ) Volume Invert Avail.Storage Storage Description #1 574.50' 4,241 cf 36.0" Round Pipe Storage L= 600.0' Device Routing Invert Outlet Devices #1 Primary 574.50' 12.0" Round Culvert L= 75.0' CMP, projecting, no headwall, Ke= 0.900 Inlet/ Outlet Invert= 574.50' / 573.75' S= 0.0100 7' Cc= 0.900 n= 0.018 Corrugated PE, corrugated interior, Flow Area= 0.79 sf #2 Device 1 574.50' 7.0" Vert. Orifice/Grate C= 0.600 #3 Device 1 575.90' 3.0' long Sharp -Crested Rectangular Weir 2 End Contraction(s) Primary OutFlow Max=3.47 cfs @ 12.06 hrs HW=576.69' (Free Discharge) L1=Culvert (Barrel Controls 3.47 cfs @ 4.41 fps) t2=Orifice/Grate (Passes < 1.77 cfs potential flow) 3=Sharp-Crested Rectangular Weir(Passes < 6.54 cfs potential flow) Post Type 1l 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 50 Pond 4P: Pipe Storage Hydrograph 7 6 5 N 4 V 3 LL 3 5 A 2 1 0 0 1 2 3 4 5 6 7 8 9 10 11 17 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Pond 4P: Pipe Storage Stage -Discharge 0 1 2 3 4 Discharge (efs) ri InSow ❑ Primary ❑ Primary Post Type 11 24-hr 70 YR Rainfall=5.57" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 54 Pond 4P: Pipe Storage Stage -Area -Storage ❑ Storage 0 500 1.000 1,500 2.000 2.500 3,000 3,500 4.000 Storage (cubist -feet) Post Type it 24-hr 70 YR Rainfall=5.57" Prepared by Timmons Group Printed 2i412020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 52 Hydrograph for Pond 4P: Pipe Storage Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 0.00 0.00 0 574.50 0.00 0.50 0.00 0 574.50 0.00 1.00 0A0 0 574.50 0.00 1.50 0A0 0 574.50 0.00 2.00 0.01 6 574.53 0.00 2.50 0.01 18 574.55 0.01 3.00 0.02 28 574.57 0.02 3.50 0.03 36 574.59 0.02 4.00 0.03 43 574.60 0.03 4.50 OA4 49 574.61 0.04 5.00 OA5 56 574.62 0.04 5.50 0.05 62 574.63 0.05 6.00 M6 68 574.63 0.05 6.50 0.06 73 574.64 0.06 7.00 0.07 79 574.65 0.07 7.50 0A8 84 574.66 0.07 8.00 0.08 89 574.66 0.08 8.50 0.10 99 574.67 0.09 9.00 OA 2 116 574.69 0.11 9.50 0.13 125 574.70 0.13 10.00 0.16 139 574.72 0.15 10.50 0.21 171 574.75 0.19 11.00 0.29 222 574.80 0.26 11.50 0.49 326 574.89 0.41 12.00 5.78 3,109 576.56 3.35 12.50 OA9 1,510 575.66 1.20 13.00 0.30 514 575.04 0.64 13.50 0.23 237 574.81 0.28 14.00 0.18 178 574.76 0.20 14.50 0.16 153 574.73 0.16 15.00 0.14 140 574.72 0.15 15.50 0.12 127 574.71 0.13 16.00 OA 1 116 574.69 0.11 16.50 0.10 107 574.68 0.10 17.00 0.09 103 574.68 0.10 17.50 0.09 98 574.67 0.09 18.00 0.08 94 574.67 0.09 18.50 0.08 89 574.66 0.08 19.00 0.07 85 574.66 0.07 19.50 0.07 80 574.65 0.07 20.00 0.06 75 574.64 0.06 20.50 0.06 72 574.64 0.06 21.00 0.06 71 574.64 0.06 21.50 OM 70 574.64 0.06 22.00 0A6 69 574.64 0.06 22.50 0.05 68 574.63 0.05 23.00 0.05 67 574.63 0.05 23.50 0.05 66 574.63 0.05 24.00 0.05 65 574.63 0.05 Post Type it 24-hr 70 YR Rainfall=5.57" Prepared by Timmons Group Printed 2I412020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paue 53 Elevation Primary (feet) (Cfs) 574.50 0.00 574.52 0.00 574.54 0A0 574.56 0.01 574.58 0.02 574.60 0.03 574.62 0.04 574.64 0.06 574.66 0.08 574.68 0.10 574.70 0.12 574.72 0.15 574.74 0.17 574.76 0.20 574.78 0.23 574.80 0.26 574.82 0.29 574.84 0.32 574.86 0.35 574.88 0.39 574.90 0.42 574.92 0.45 574.94 0.49 574.96 0.52 574.98 0.56 575.00 0.59 575.02 0.62 575.04 0.65 575.06 0.67 575.08 0.69 575.10 0.71 575.12 0.74 575.14 0.76 575.16 0.78 575.18 0.80 575.20 0.82 575.22 0.84 575.24 0.86 575.26 0.88 575.28 0.90 575.30 0.92 575.32 0.94 575.34 0.95 575.36 0.97 575.38 0.99 575.40 1.00 575.42 1.02 575.44 1.04 575.46 1.05 575.48 1.07 575.50 1.08 575.52 1.10 Stage -Discharge for Pond 4P: Pipe Storage Elevation Primary (feet) {Cfs} 575.54 1.11 575.56 1.13 575.58 1.14 575.60 1.16 575.62 1.17 575.64 1.19 575.66 1.20 575.68 1.21 575.70 1.23 575.72 1.24 575.74 1.25 575.76 1.27 575.78 1.28 575.80 1.29 575.82 1.30 575.84 1.32 575.86 1.33 575.88 1.34 575.90 1.35 575.92 1.39 575.94 1.46 575.98 1.53 575.98 1.62 576.00 1.72 576.02 1.83 576.04 1.95 576A6 2.07 576.08 2.20 576.10 2.34 576.12 2.48 576.14 2.63 576.16 2.78 576.18 2.94 576.20 3.00 576.22 3.02 576.24 3.04 576.26 3.06 576.28 3.08 576.30 3.10 576.32 3.12 576.34 3.14 576.36 3.16 576.38 3.18 576A0 3.20 576A2 3.22 576.44 3.24 576.46 3.25 576.48 3.27 576.50 3.29 576.52 3.31 576.54 3.33 576.56 3.35 Elevation Primary (feet) (Cfs) 576.58 3.37 576.60 3.38 576.62 3.40 576.64 3.42 576.66 3.44 576.68 3.46 576.70 3.48 576.72 3.49 576.74 3.51 576.76 3.53 576.78 3.55 576.80 3.56 576.82 3.58 576.84 3.60 576.86 3.61 576.88 3.63 576.90 3.65 576.92 3.67 576.94 3.68 576.96 3.70 576.98 3.72 577.00 3.73 577.02 3.75 577.04 3.77 577.06 3.78 577.08 3.80 577.10 3.81 577.12 3.83 577.14 3.85 577.16 3.86 577.18 3.88 577.20 3.90 577.22 3.91 577.24 3.93 577.26 3.94 577.28 3.96 577.30 3.97 577.32 3.99 577.34 4.00 577.36 4.02 577.38 4.04 577.40 4.05 577.42 4.07 577.44 4.08 577.46 4.10 577.48 4.11 577.50 4.13 Post Type it 24-hr 70 YR Rainfall=5.57" Prepared by Timmons Group Printed 2I412020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 54 Elevation Storage (feet) (cubic -feet) 574.50 0 574.52 4 574.54 11 574.56 20 574.58 31 574.60 43 574.62 57 574.64 72 574.66 87 574.68 104 574.70 121 574.72 140 574.74 159 574.76 179 574.78 199 574.80 221 574.82 243 574.84 265 574.86 288 574.88 312 574.90 336 574.92 361 574.94 386 574.96 412 574.98 438 575.00 465 575.02 492 575.04 519 575.06 547 575.08 575 575.10 604 575.12 633 575.14 662 575.16 692 575.18 722 575.20 752 575.22 783 575.24 814 575.26 845 575.28 876 575.30 908 575.32 940 575.34 972 575.36 1,005 575.38 1,037 575.40 1,070 575.42 1,103 575.44 1,137 575.46 1,170 575.48 1,204 575.50 1,238 575.52 1,272 Stage -Area -Storage for Pond 4P: Pipe Storage Elevation Storage (feet) (cubic -feet) 575.54 1,306 575.56 1,340 575.58 1,375 575.60 1,409 575.62 1,444 575.64 1,479 575.66 1,514 575.68 1,549 575.70 1,584 575.72 1,620 575.74 1,655 575.76 1,690 575.78 1,726 575.80 1,762 575.82 1,797 575.84 1,833 575.86 1,869 575.88 1,905 575.90 1,941 575.92 1,977 575.94 2,013 575.96 2,049 575.98 2,085 576.00 2,121 576.02 2,157 576.04 2,193 576.06 2,229 576.08 2,265 576.10 2,300 576.12 2,336 576.14 2,372 576.16 2,408 576.18 2,444 576.20 2,480 576.22 2,515 576.24 2,551 576.26 2,586 576.28 2,622 576.30 2,657 576.32 2,692 576.34 2,727 576.36 2,762 576.38 2,797 576.40 2,832 576.42 2,867 576.44 2,901 576.46 2,935 576.48 2,970 576.50 3,004 576.52 3,037 576.54 3,071 576.56 3,105 Elevation Storage (feet) (cubic -feet) 576.58 3,138 576.60 3,171 576.62 3,204 576.64 3,237 576.66 3,269 576.68 3,301 576.70 3,333 576.72 3,365 576.74 3,396 576.76 3,428 576.78 3,458 576.80 3,489 576.82 3,519 576.84 3,549 576.86 3,579 576.88 3,608 576.90 3,637 576.92 3,666 576.94 3,694 576.96 3,722 576.98 3,749 577.00 3,777 577.02 3,803 577.04 3,829 577.06 3,855 577.08 3,880 577.10 3,905 577.12 3,929 577.14 3,953 577.16 3,976 577.18 3,999 577.20 4,020 577.22 4,042 577.24 4,062 577.26 4,082 577.28 4,101 577.30 4,120 577.32 4,137 577.34 4,154 577.36 4,170 577.38 4,184 577.40 4,198 577.42 4,210 577.44 4,221 577.46 4,230 577.48 4,237 577.50 4,241 Post Type it 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2i412020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paue 55 Summary for Link 8L: POA3 Inflow Area = 0.830 ac, 90.36% Impervious, Inflow Depth > 5.05" for 10 YR event Inflow = 3.51 cfs @ 12.05 hrs, Volume= 0.350 of Primary = 3.51 cfs @ 12.05 hrs, Volume= 0.350 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Link 8L: POA3 Hydrograph Winn -' Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 16 19 20 21 22 23 24 Time (hours) Post Type it 24-hr 70 YR Rainfall=5.57" Prepared by Timmons Group Printed 2i412020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 56 Hydrograph for Link 8L: POA3 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 0.25 0.00 0.00 0.00 0.50 0A0 0.00 0.00 0.75 0A0 0.00 0.00 1.00 0.00 0.00 0.00 1.25 0.00 0.00 0.00 1.50 0.00 0.00 0.00 1.75 0.00 OM 0.00 2.00 0.00 0.00 0.00 2.25 MO 0.00 0.00 2.50 OA1 0.00 0.01 2.75 0.01 0.00 0.01 3.00 0.02 0.00 0.02 3.25 OM 0.00 0.02 3.50 0.02 0.00 0.02 3.75 0.03 0.00 0.03 4.00 0.03 0.00 0.03 4.25 0.03 0.00 0.03 4.50 O,04 0.00 0.04 4.75 0.04 0.00 0.04 5.00 O,04 0.00 0.04 5.25 0.04 0.00 0.04 5.50 0.05 0.00 0.05 5.75 0.05 0.00 0.05 6.00 OA5 0.00 0.05 6.25 0.06 0.00 0.06 6.50 OA6 0.00 0.06 6.75 M6 0.00 0.06 7.00 0.07 0.00 0.07 7.25 0.07 0.00 0.07 7.50 0.07 0.00 0.07 7.75 0.08 0.00 0.08 8.00 0A8 0.00 0.08 8.25 0.08 0.00 0.08 8.50 0.09 0A0 0.09 8.75 OA O 0.00 0.10 9.00 0.12 0.00 0.12 9.25 0.12 0.00 0.12 9.50 0.13 0.00 0.13 9.75 0.13 0.00 0.13 10.00 OA 5 0.00 0.15 10.25 OA 7 0.00 0.17 10.50 OA 9 0.00 0.19 10.75 0.22 0.00 0.22 11.00 0.26 0.00 0.26 11.25 0.32 0.00 0.32 11.50 0.41 0.00 0.41 11.75 0.87 0.00 0.87 12.00 3.40 0.00 3.40 12.25 1.95 0.00 1.95 12.50 1.20 0.00 1.20 12.75 0,93 0.00 0.93 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 13.00 0.64 0.00 0.64 13.25 0.39 0.00 0.39 13.50 0.28 0.00 0.28 13.75 0.23 0.00 0.23 14.00 0.20 0.00 0.20 14.25 0.18 0.00 0.18 14.50 0.17 0.00 0.17 14.75 0.16 0.00 OA 6 15.00 0.15 0.00 OA 5 15.25 0.14 0.00 0.14 15.50 0.13 0.00 0.13 15.75 0.12 0.00 0.12 16.00 0.12 0.00 0.12 16.25 0.11 0.00 0.11 16.50 0.10 0.00 0.10 16.75 0.10 0.00 0.10 17.00 0.10 0.00 0.10 17.25 0.10 0.00 0.10 17.50 0.09 0.00 0,09 17.75 0.09 0.00 0.09 18.00 0.09 0.00 0.09 18.25 0.08 0.00 0.08 18.50 0.08 0.00 OM 18.75 0.08 0.00 OM 19.00 0.08 0.00 OM 19.25 0.07 0.00 0.07 19.50 0.07 0.00 OA7 19.75 0.07 0.00 0.07 20.00 0.06 0.00 0.06 20.25 0.06 0.00 0.06 20.50 0.06 0.00 0.06 20.75 0.06 0.00 0.06 21.00 0.06 0.00 0.06 21.25 0.06 0.00 0.06 21.50 0.06 0.00 0.06 21.75 0.06 0.00 0A6 22.00 0.06 0.00 0.06 22.25 0.06 0.00 0.06 22.50 0.06 0.00 0.06 22.75 0.05 0.00 0.05 23.00 0.05 0.00 0.05 23.25 0.05 0.00 0.05 23.50 0.05 0.00 OA5 23.75 0.05 0.00 0.05 24.00 0.05 0.00 0.05 Post Type ff 24-hr 100 YR Ratrrfaff=9.14" Prepared by Timmons Group Printed 2f4f2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Pane 57 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Star -Ind method Subcatchment2S: Post-3Ato POA3 Runoff Area=0.820 ac 91.46% Impervious Runoff Depth>8.65" Tc=6.0 min CN=96 Runoff=10.36 cfs 0.591 of Subcatchment5S: Post-2 to POA2 Runoff Area=0.190 ac 73.68% Impervious Runoff Depth>8.29" Tc=6.0 min CN=93 Runoff=2.37 cfs 0.131 of Subcatchment6S: Post-1 to POA1 Runoff Area=0.490 ac 71.43% Impervious Runoff Depth>8.29" Tc=6.0 min CN=93 Runoff=6.11 cfs 0.338 of Subcatchment7S: Post-313 to POA3 Runoff Area=0.010 ac 0.00% Impervious Runoff Depth>6.69" Tc=6.0 min CN=80 Runoff=0.11 cfs 0.006 of Pond 4P: Pipe Storage Peak PIev=614.00' Storage=4,241 cf Inflow=10.36 cfs 0.591 of ❑utflow=15.59 cfs 0.589 of Link 8L: POA3 Inflow=15.69 cfs 0.595 of Primary=15.69 cfs 0.595 of Total Runoff Area = 1.510 ac Runoff Volume = 1.066 of Average Runoff Depth = 8.47" 17.88% Pervious = 0.270 ac 82.12% Impervious = 1.240 ac Post Type !I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 58 Summary for Subcatchment 2S: Post-3A to POA3 Runoff = 10.36 cfs @ 11.96 hrs, Volume= 0.591 af, Depths 8.65" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN ❑escriotion 0.750 98 Paved parking, HSG ❑ 0.070 80 >75% Grass cover, Good, HSG D 0.820 96 Weighted Average 0.070 8.54% Pervious Area 0.750 91.46% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (fUsec) (Cfs) 6.0 Direct Entry, Subcatchment 2S: Post-3A to POA3 Hydrograph 11 ,a ss r5 10 Type II 24-hr 9 100 YR Rainfall=9.14" 8-- Runoff Area=0.820 ac 7 Runoff Vol ume=0.591 of Runoff Depth>8.65" 3 lL cj Tc=6.0 min 4 CN=96 3 2 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) p Runoff Post Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Page 59 Hydrograph for Subcatchment 2S: Post-3A to POA3 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 OM 1.25 0.12 0.00 0.01 1,50 0.15 0.01 0.02 1.75 0.17 0.02 0.03 2.00 0.20 0.03 0.03 2.25 0.23 0.04 0.04 2.50 0.26 0.05 0.05 2.75 0.29 0.07 0.05 3.00 0.32 0.08 0.06 3.25 0.35 0.10 0.06 3.50 0.38 0.12 0.07 3.75 0.41 0.14 0.07 4.00 0.44 0.16 0.07 4.25 0.47 0.19 0.08 4.50 0.50 0.21 0.08 4.75 0.54 0.24 0.09 5.00 0.58 0.27 0.09 5.25 0.61 0.30 0.10 5.50 0.65 0.33 0.10 5.75 0.69 0.36 0.11 6.00 0.73 0.39 0.11 6.25 0.77 0.43 0.12 6.50 0.82 0.47 0.12 6.75 0.86 0.51 0.13 7.00 0.90 0.55 0.13 7.25 0.95 0.59 0.14 7.50 1.00 0.63 0.14 7.75 1.05 0.67 0.15 8.00 1.10 0.72 0.15 8.25 1.15 0.77 0.16 8.50 1.21 0.82 0.18 8.75 1.27 0.88 0.20 9.00 1.34 0.95 0.22 9.25 1.42 1.02 0.23 9.50 1.49 1.09 0.23 9.75 1.57 1.16 0.25 10.00 1.65 1.24 0.28 10.25 1.75 1.34 0.32 10.50 1.86 1.44 0.36 10.75 1.99 1.57 0.43 11.00 2.15 1.72 0.50 11.25 2.34 1.90 0.64 11.50 2.59 2.15 0.82 11.75 3.54 3.08 3.67 12.00 6.06 5.59 9.56 12.25 6.45 5.98 1.27 12.50 6.72 6.24 0.81 12.75 6.90 6.43 0.59 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 7.06 6.58 0.50 13.25 7.19 6.71 0.43 13.50 7.30 6.83 0.37 13,75 7,40 6.93 0.33 14.00 7.49 7.02 0.29 14.25 7.58 7.10 0.27 14.50 7.66 7.18 0.26 14.75 7.73 7.25 0.24 15.00 7.80 7.32 0.23 15.25 7.87 7.39 0.22 15.50 7.93 7.45 0.20 15.75 7.99 7.51 OA 9 16.00 8.04 7.56 OA 8 16.25 8.10 7.62 0.17 16.50 8.15 7.67 OA 7 16.75 8.19 7.71 0.16 17.00 8.24 7.76 0.16 17.25 8.29 7.81 OA 5 17.50 8.33 7.85 OA 5 17.75 8.38 7.90 OA 4 18.00 8.42 7.94 0.14 18.25 8.46 7.98 0.13 18.50 8.50 8.02 0.13 18.75 8.53 8.05 0.12 19.00 8.57 8.09 OA 2 19.25 8.61 8.13 0.11 19.50 8.64 8.16 OA 1 19.75 8.67 8.19 0.10 20.00 8.70 8.22 0.10 20.25 8.73 8.25 0.10 20.50 8.76 8.28 0.10 20.75 8.79 8.31 0.10 21.00 8.82 8.34 0.09 21.25 8.85 8.37 0A9 21.50 8.87 8.39 0.09 21,75 8.90 8.42 0.09 22.00 8.93 8.45 0.09 22.25 8.96 8.48 0.09 22.50 8.98 8.50 0.09 22.75 9.01 8.53 0.09 23.00 9.04 8.56 OM 23.25 9.06 8.58 0.09 23.50 9.09 8.61 0.09 23.75 9.11 8.63 OM 24.00 9.14 8.66 0.08 Post Type !I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 60 Summary for Subcatchment 5S: Post-2 to POA2 Runoff = 2.37 cfs @ 11.96 hrs, Volume= 0.131 af, ❑epth> 8.29" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN Description 0.050 80 >75% Grass cover, Good, HSG D 0.140 98 Paved parking, HSG ❑ 0.190 93 Weighted Average 0.050 26.32% Pervious Area 0.140 73.68% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 5S: Post-2 to PQA2 Hydrograph ❑ Runoff Type II 24-hr 100 YR Rainfall=9.14" Runoff Area=0.190 ac Runoff Volume=0.131 of Runoff Depth>8.29" 0 LL Tc=6.0 min ,I 1 11 1 CN=93 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Post Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Page 61 Hydrograph for Suhcatchment 5S: Post-2 to PQA2 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 0A0 1.25 0.12 0.00 0.00 1,50 0.15 0.00 0.00 1.75 0.17 0.00 0.00 2.00 0.20 0.00 0.00 2.25 0.23 0.01 0.00 2.50 0.26 0.01 0.00 2.75 0.29 0.02 0.01 3.00 0.32 0.03 0.01 3.25 0.35 0.04 0.01 3.50 0.38 0.05 0.01 3.75 0.41 0.07 0.01 4.00 0.44 0.08 0.01 4.25 0.47 0.10 0.01 4.50 0.50 0.11 0.01 4.75 0.54 0.13 0.01 5.00 0.58 0,15 0.02 5.25 0.61 0,18 0.02 5.50 0.65 0.20 0.02 5.75 0.69 0.23 0.02 6.00 0.73 0.25 0.02 6.25 0.77 0.28 0.02 6.50 0.82 0.31 0.02 6.75 0.86 0.34 0.02 7.00 0.90 0.38 0.03 7.25 0.95 0.41 0.03 7.50 1.00 0.45 0.03 7.75 1.05 0.49 0.03 8.00 1.10 0.53 0.03 8.25 1.15 0.57 0.03 8.50 1.21 0.62 0.04 8.75 1.27 0.67 0.04 9.00 1.34 0.73 0.05 9.25 1.42 0.79 0.05 9.50 1.49 0.86 0.05 9.75 1.57 0.93 0.05 10.00 1.65 1.00 0.06 10.25 1.75 1.09 0.07 10.50 1.86 1.19 0.08 10.75 1.99 1.31 0.09 11.00 2.15 1.45 0.11 11.25 2.34 1.63 0.14 11.50 2.59 1.86 0.18 11.75 3.54 2.77 0.83 12.00 6.06 5.24 2.19 12.25 6.45 5.63 0.29 12.50 6.72 5.89 0.19 12.75 6.90 6.07 0.14 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 7.06 6.23 0.11 13.25 7.19 6.36 0.10 13.50 7.30 6.47 0.09 13,75 7,40 6.57 0.08 14.00 7.49 6.66 0.07 14.25 7.58 6.74 0.06 14.50 7.66 6.82 0.06 14.75 7.73 6.90 0,06 15.00 7.80 6.97 0.05 15.25 7.87 7.03 0.05 15.50 7.93 7.09 0.05 15.75 7.99 7.15 0.04 16.00 8.04 7.21 0.04 16.25 8.10 7.26 0.04 16.50 8.15 7.31 0.04 16.75 8.19 7.36 0.04 17.00 8.24 7.40 0.04 17.25 8.29 7.45 0.03 17.50 8.33 7.49 0.03 17.75 8.38 7.54 0A3 18.00 8.42 7.58 0.03 18.25 8.46 7.62 0.03 18.50 8.50 7.66 0.03 18.75 8.53 7.69 0.03 19.00 8.57 7.73 0.03 19.25 8.61 7.76 0.03 19.50 8.64 7.80 0.03 19.75 8.67 7.83 0.02 20.00 8.70 7.86 0.02 20.25 8.73 7.89 0.02 20.50 8.76 7.92 0.02 20.75 8.79 7.95 0.02 21.00 8.82 7.97 0.02 21.25 8.85 8.00 0.02 21.50 8.87 8.03 0.02 21,75 8.90 8.06 0.02 22.00 8.93 8.09 0.02 22.25 8.96 8.11 0.02 22.50 8.98 8.14 0.02 22.75 9.01 8.17 0.02 23.00 9.04 8.19 0.02 23.25 9.06 8.22 0.02 23.50 9.09 8.24 0.02 23.75 9.11 8.27 0.02 24.00 9.14 8.29 0A2 Post Type !I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Pape 62 Summary for Subcatchment 6S: Post-1 to POA1 Runoff = 6.11 cfs @ 11.96 hrs, Vol ume= 0.338 af, ❑epth> 8.29" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN Description 0.140 80 >75% Grass cover, Good, HSG D 0.350 98 Paved parking, HSG ❑ 0.490 93 Weighted Average 0.140 28.57% Pervious Area 0.350 71.43% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 6S: Post-1 to PQA1 Hydrograph ❑ Runoff Type II 24-hr 100 YR Rainfall=9.14" 5 Runoff Area=0.490 ac Runoff Volume=0.338 of 4 Runoff Depth>8.29. 3 Tc=6.0 min CN=93 2 _. 1 fl 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Post Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Paue 63 Hydrograph for 5uhcatchment 65: Post -'I to PQA9 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 0A0 1.25 0.12 0.00 0.00 1,50 0.15 0.00 0.00 1.75 0.17 0.00 0.00 2.00 0.20 0.00 0.01 2.25 0.23 0.01 0.01 2.50 0.26 0.01 0.01 2.75 0.29 0.02 0.02 3.00 0.32 0.03 0.02 3.25 0.35 0.04 0.02 3.50 0.38 0.05 0.02 3.75 0.41 0.07 0.03 4.00 0.44 0.08 0.03 4.25 0.47 0.10 0.03 4.50 0.50 0.11 0.04 4.75 0.54 0.13 0.04 5.00 0.58 0,15 0.04 5.25 0.61 0,18 0.04 5.50 0.65 0.20 0.05 5.75 0.69 0.23 0.05 6.00 0.73 0.25 0.05 6.25 0.77 0.28 0.06 6.50 0.82 0.31 0.06 6.75 0.86 0.34 0.06 7.00 0.90 0.38 0.07 7.25 0.95 0.41 0.07 7.50 1.00 0.45 0.07 7.75 1.05 0.49 0.08 8.00 1.10 0.53 0.08 8.25 1.15 0.57 0.09 8.50 1.21 0.62 0.10 8.75 1.27 0.67 0.11 9.00 1.34 0.73 0.12 9.25 1.42 0.79 0.12 9.50 1.49 0.86 0.13 9.75 1.57 0.93 0.14 10.00 1.65 1.00 0.15 10.25 1.75 1.09 0.18 10.50 1.86 1.19 0.20 10.75 1.99 1.31 0.24 11.00 2.15 1.45 0.28 11.25 2.34 1.63 0.37 11.50 2.59 1.86 0.47 11.75 3.54 2.77 2.13 12.00 6.06 5.24 5.65 12.25 6.45 5.63 0.75 12.50 6.72 5.89 0.48 12.75 6.90 6.07 0.35 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 7.06 6.23 0.29 13.25 7.19 6.36 0.25 13.50 7.30 6.47 0.22 13,75 7,40 6.57 0.20 14.00 7.49 6.66 OA 7 14.25 7.58 6.74 0.16 14.50 7.66 6.82 0.15 14.75 7.73 6.90 0.15 15.00 7.80 6.97 OA 4 15.25 7.87 7.03 OA 3 15.50 7.93 7.09 0.12 15.75 7.99 7.15 OA 1 16.00 8.04 7.21 OA 1 16.25 8.10 7.26 0.10 16.50 8.15 7.31 0.10 16.75 8.19 7.36 0.10 17.00 8.24 7.40 0.09 17.25 8.29 7.45 0A9 17.50 8.33 7.49 0A9 17.75 8.38 7.54 0.08 18.00 8.42 7.58 0.08 18.25 8.46 7.62 0.08 18.50 8.50 7.66 0.08 18.75 8.53 7.69 0.07 19.00 8.57 7.73 0.07 19.25 8.61 7.76 0.07 19.50 8.64 7.80 OM 19.75 8.67 7.83 0.06 20.00 8.70 7.86 0.06 20.25 8.73 7.89 0.06 20.50 8.76 7.92 0.06 20.75 8.79 7.95 0.06 21.00 8.82 7.97 0.06 21.25 8.85 8.00 0.06 21.50 8.87 8.03 0.06 21,75 8.90 8.06 0.05 22.00 8.93 8.09 0.05 22.25 8.96 8.11 0.05 22.50 8.98 8.14 0.05 22.75 9.01 8.17 0.05 23.00 9.04 8.19 0,05 23.25 9.06 8.22 0.05 23.50 9.09 8.24 0.05 23.75 9.11 8.27 0.05 24.00 9.14 8.29 0.05 Post Type !I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 64 Summary for Subcatchment 7S: Post-3B to POA3 Runoff = 0.11 cfs @ 11.97 hrs, Volume= 0.006 af, Depths 6.69" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN Description 0.010 80 >75% Grass toyer, Good, HSG D 0.010 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, 0.12 0.115 0.11 0.105 O., 0-095 0.09 0.085 0.08 0.075 0.07 -S0-065 0-0E a: 0.055- 0.05 0.045 0.04 0.035 0-03 0-025 0.02 0.015 0.01 0.005 01 Subcatchment 7S: Post-3B to PQA3 Hydrograph I` T —I— F —1 T 1 J _I- 1 -1_ L J _1- 1 _1_ J_ - I- + -I- F- -! - I- - I- T -1- _ r 1 1- - 1 _I_ _I_ _! _ I_ _I_- 1 ---t - I - t -1- -1 - 1- t - I - t -T -I- T -I- F 1 - I- T -I- T _! -I- -1 -1- t -1- !_ r -1 - 1- t -I- t _I -1 _I_ 1 _1_ _ I_ 1 _ I_ L. J _ I_ _I _ I _I_ 1 --4 -1- T -1- - 1- T -1- 4- 7-1— r- 1 — 1— T — I — 1 1 -1 = Type II 24-hr 100 YR Rainfall=9.14" Runoff Area=0.010 ac Runoff Volume=0.006 of -' -; - Runoff Depth>6.69" -'- - -' - Tc=6.0 min 4 -1- 4- -1- rt CN=80 -1 _ I _ L _I _ L -1 _ 1_ 1 _1 _ L 1 - 4 - I - 4- -1 - �- -4 - 1- 4- —1 - �- - I - T- -1 - 1- I - I- T -1 - t- 1 2 3 4 5 6 7 8 9 10 t1 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Post Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 (D 2017 HydroCAD Software Solutions LLC Paae 65 Hydrograph for Subcatchment 7S: Post-3B to PQA3 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 0A0 1.25 0.12 0.00 0.00 1,50 0.15 0.00 0.00 1.75 0.17 0.00 0.00 2.00 0.20 0.00 0.00 2.25 0.23 0.00 0.00 2.50 0.26 0.00 0.00 2.75 0.29 0.00 0.00 3.00 0.32 0.00 0.00 3.25 0.35 0.00 0.00 3.50 0.38 0.00 0.00 3.75 0.41 0.00 0.00 4.00 0.44 0.00 0.00 4.25 0.47 0.00 0.00 4.50 0.50 0.00 0.00 4.75 0.54 0.00 0.00 5.00 0.58 0.00 0.00 5.25 0.61 0.00 0.00 5.50 0.65 0.01 0.00 5.75 0.69 0.01 0.00 6.00 0.73 0.02 0.00 6.25 0.77 0.03 0.00 6.50 0.82 0.04 0.00 6.75 0.86 0.05 0.00 7.00 0.90 0.06 0.00 7.25 0.95 0.07 0.00 7.50 1.00 0.08 0.00 7.75 1.05 0.10 0.00 8.00 1.10 0.12 0.00 8.25 1.15 0.13 0.00 8.50 1.21 0.16 0.00 8.75 1.27 0.18 0.00 9.00 1.34 0.21 0.00 9.25 1.42 0.25 0.00 9.50 1.49 0,28 0.00 9.75 1.57 0.32 0.00 10.00 1.65 0.36 0.00 10.25 1.75 0.42 0.00 10.50 1.86 0.48 0.00 10.75 1.99 0.56 0.00 11.00 2.15 0.65 0.00 11.25 2.34 0.78 0.01 11.50 2.59 0.95 0.01 11.75 3.54 1.67 0.03 12.00 6.06 3.84 0.10 12.25 6.45 4.19 0.01 12.50 6.72 4.43 0.01 12.75 6.90 4.60 0.01 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 7.06 4.75 0.01 13.25 7.19 4.87 0.00 13.50 7.30 4.97 0.00 13,75 7,40 5.07 0.00 14.00 7.49 5.15 0.00 14.25 7.58 5.23 0.00 14.50 7.66 5.30 0.00 14.75 7.73 5.37 0.00 15.00 7.80 5.44 0.00 15.25 7.87 5.50 0.00 15.50 7.93 5.56 0.00 15.75 7.99 5.61 0.00 16.00 8.04 5.67 0.00 16.25 8.10 5.71 0.00 16.50 8.15 5.76 0.00 16.75 8.19 5.81 0.00 17.00 8.24 5.85 0.00 17.25 8.29 5.90 0A0 17.50 8.33 5.94 0.00 17.75 8.38 5.98 0.00 18.00 8.42 6.02 0.00 18.25 8.46 6.06 0.00 18.50 8.50 6.09 0.00 18.75 8.53 6.13 OM 19.00 8.57 6.16 0.00 19.25 8.61 6.20 0.00 19.50 8.64 6.23 0.00 19.75 8.67 6.26 0.00 20.00 8.70 6.29 0.00 20.25 8.73 6.31 0.00 20.50 8.76 6.34 0.00 20.75 8.79 6.37 0.00 21.00 8.82 6.40 0.00 21.25 8.85 6.42 0.00 21.50 8.87 6.45 0.00 21,75 8.90 6.48 0.00 22.00 8.93 6.50 0.00 22.25 8.96 6.53 0.00 22.50 8.98 6.55 OM 22.75 9.01 6.58 0.00 23.00 9.04 6.60 OM 23.25 9.06 6.63 0.00 23.50 9.09 6.65 0.00 23.75 9.11 6.68 OM 24.00 9.14 6.70 0.00 Post Type !I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 66 Summary for Pond 4P: Pipe Storage [93] Warning: Storage range exceeded by 36.50' (88] Warning: Qout>Qin may require smaller dt or Finer Routing Inflow Area = 0.820 ac, 91.46% Impervious, Inflow Depth > 8.65" for 100 YR event Inflow = 10.36 cfs @ 11.96 hrs, Volume= 0.591 of Outflow = 15.59 cfs @ 12.00 hrs, Volume= 0.589 af, Atten= 0%, Lag= 2.3 min Primary = 15.59 cfs @ 12.00 hrs, Volume= 0.589 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 614.00' @ 12.00 hrs Surf.Area= 0 sf Storage= 4,241 cf Plug -Flow detention time=14.7 min calculated for 0.588 of (99% of inflow) Center -of -Mass det. time= 12.6 min ( 757.9 - 745.3 ) Volume Invert Avail.Storage Storage ❑escription #1 574.50' 4,241 cf 36.0" Round Pipe Storage L= 600.0' Device Routing Invert Outlet Devices #1 Primary 574.50' 12.0" Round Culvert L= 75.0' CMP, projecting, no headwall, Ke= 0.900 Inlet/ Outlet Invert= 574.50' / 573,75' S= 0.0100 '1' Cc= 0.900 n= 0.018 Corrugated PE, corrugated interior, Flow Area= 0.79 sf #2 Device 1 574.50' 7.0" Vert. Orifice/Grate C= 0.600 #3 Device 1 575.90' 3.0' long Sharp -Crested Rectangular Weir 2 End Contraction(s) Primary ❑utFlow Max=15.52 cfs @ 12.00 hrs HW=613.64' (Free Discharge) L1=Culvert (Barrel Controls 15.52 cfs @ 19.76 fps) �2=0rifice/Grate (Passes < 8.02 cfs potential flow) 3=Sharp-Crested Rectangular Wei r(Passes < 1,137.27 cfs potential flow) Post Type II 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 H droCAD® 10.00-20 sln 06538 © 2017 H droCAD Software Solutions LLC Page 67 Pond 4P: Pipe Storage Hydrograph 3 0 LL w 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Pond 4P: Pipe Storage Stage -Discharge 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Discharge (cfs) L7 Inflow ❑ Primary ❑ PrirrEary Post Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 58 Pond 4P: Pipe Storage Stage -Area -Storage C7 Storage 0 500 1.000 1,500 2,000 2,500 3.000 3.500 4.000 Storage (cubic -feet) Post Type !I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Page 69 Hydrograph for Pond 4P: Pipe Storage Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 0.00 0.00 0 574.50 0.00 0.50 0.00 0 574.50 0.00 1.00 0A0 0 574.50 0.00 1.50 0.02 10 574.52 0.01 2.00 0.03 24 574,54 0.03 2.50 0.05 36 574.55 0.04 3.00 0.06 46 574.57 0.05 3.50 0.07 56 574.58 0.06 4.00 0.07 64 574.60 0.07 4.50 0.08 72 574.61 0.08 5.00 0.09 81 574.62 0.09 5.50 0.10 91 574.64 0.10 6.00 0.11 100 574.65 0.11 6.50 0.12 109 574.66 0.12 7.00 0.13 117 574.68 0.13 7.50 0.14 126 574.69 0.14 8.00 0.15 134 574.70 0.15 8.50 0.18 153 574.73 0.17 9.00 0.22 182 574.76 0.20 9.50 0.23 198 574.77 0.23 10.00 0.28 220 574.79 0.26 10.50 0.36 272 574.84 0.33 11.00 0.50 357 574.91 0.44 11.50 0.82 551 575,06 0.65 12.00 9.56 4,241 614,00 15.59 12.50 0.81 1,908 575.88 1.34 13.00 0.50 945 575.32 0.93 13.50 0.37 423 574.97 0.53 14.00 0.29 277 574.84 0.33 14.50 0.26 231 574.80 0.27 15.00 0.23 209 574.78 0.24 15.50 0.20 190 574.77 0.22 16.00 OA 8 171 574.75 0.19 16.50 0.17 157 574.74 0.17 17.00 0.16 148 574.72 0.16 17.50 OA 5 139 574.71 0.15 18.00 0.14 131 574.70 0.14 18.50 0.13 122 574.68 0.13 19.00 0.12 113 574.67 0.12 19.50 0.11 105 574.66 0.11 20.00 0.10 96 574.65 0.10 20.50 0.10 90 574.64 0.10 21.00 0.09 88 574.63 0.10 21.50 0.09 86 574.63 0.09 22.00 0.09 84 574.63 0.09 22.50 0.09 83 574.62 0.09 23.00 0.09 81 574.62 0.09 23.50 0.09 79 574.62 0.09 24.00 0.08 77 574.62 0.08 Post Type !I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 70 Elevation Primary (feet) (Cfs) 574.50 0AO 574.90 0.42 575.30 0.92 575.70 1.23 576.10 2.34 576.50 3.29 576.90 3.65 577.30 3.97 577.70 4.27 578.10 4.55 578.50 4.82 578.90 5.07 579.30 5.31 579.70 5.54 580.10 5.76 580.50 5.97 580.90 6.17 581.30 6.37 581.70 6.56 582.10 6.75 582.50 6.93 582.90 7.10 583.30 7.28 583.70 7.44 584.10 7.61 584.50 7.77 584.90 7.93 585.30 8.08 585.70 8.23 586.10 8.38 586.50 8.53 586.90 8.67 587.30 8.82 587.70 8.96 588.10 9A9 588.50 9.23 588.90 9.36 589.30 9.49 589.70 9.62 590.10 9.75 590.50 9.88 590.90 1 MO 591.30 10.12 591.70 10.25 592.10 10.37 592.50 10.48 592.90 10.60 593.30 10.72 593.70 10.83 594.10 10.95 594.50 11.06 594.90 11.17 Stage -Discharge for Pond 4P: Pipe Storage Elevation Primary (feet) {Cfs} 595.30 11.28 595.70 11.39 596.10 11.50 596.50 11.61 596.90 11.71 597.30 11.82 597.70 11.92 598.10 12.03 598.50 12.13 598.90 12.23 599.30 12.33 599.70 12.43 600.10 12.53 600.50 12.63 600.90 12.73 601.30 12.82 601.70 12.92 602.10 13.01 602.50 13.11 602.90 13.20 603.30 13.30 603.70 13.39 604.10 13.48 604.50 13.57 604.90 13.66 605.30 13.75 605.70 13.84 606A 0 13.93 606.50 14.02 606.90 14.11 607.30 14.20 607.70 14.28 608.10 14.37 608.50 14.46 608.90 14.54 609.30 14.63 609.70 14.71 610.10 14.80 610.50 14.88 610.90 14.96 611.30 15.05 611.70 15.13 612AO 15.21 612.50 15.29 612.90 15.37 613.30 15.45 613.70 15.53 614.10 15.61 Post Type !I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 71 Elevation Storage (feet) (cubic -feet) 574.50 0 574.90 336 575.30 908 575.70 1,584 576.10 2,300 576.50 3,004 576.90 3,637 577.30 4,120 577.70 4,241 578.10 4,241 578.50 4,241 578.90 4,241 579.30 4,241 579.70 4,241 580.10 4,241 580.50 4,241 580.90 4,241 581.30 4,241 581.70 4,241 582.10 4,241 582.50 4,241 582.90 4,241 583.30 4,241 583.70 4,241 584.10 4,241 584.50 4,241 584.90 4,241 585.30 4,241 585.70 4,241 586.10 4,241 586.50 4,241 586.90 4,241 587.30 4,241 587.70 4,241 588.10 4,241 588.50 4,241 588.90 4,241 589.30 4,241 589.70 4,241 590.10 4,241 590.50 4,241 590.90 4,241 591.30 4,241 591.70 4,241 592.10 4,241 592.50 4,241 592.90 4,241 593.30 4,241 593.70 4,241 594.10 4,241 594.50 4,241 594.90 4,241 Stage -Area -Storage for Pond 4P: Pipe Storage Elevation Storage (feet) (cubic -feet) 595.30 4,241 595.70 4,241 596.10 4,241 596.50 4,241 596.90 4,241 597.30 4,241 597.70 4,241 598.10 4,241 598.50 4,241 598.90 4,241 599.30 4,241 599.70 4,241 600.10 4,241 600.50 4,241 600.90 4,241 601.30 4,241 601.70 4,241 602.10 4,241 602.50 4,241 602.90 4,241 603.30 4,241 603.70 4,241 604.10 4,241 604.50 4,241 604.90 4,241 605.30 4,241 605.70 4,241 606.10 4,241 606.50 4,241 606.90 4,241 607.30 4,241 607.70 4,241 608.10 4,241 608.50 4,241 608.90 4,241 609.30 4,241 609.70 4,241 610.10 4,241 610.50 4,241 610.90 4,241 611.30 4,241 611.70 4,241 612.10 4,241 612.50 4,241 612.90 4,241 613.30 4,241 613.70 4,241 614.10 4,241 Post Type !I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 72 Summary for Link 8L: POA3 Inflow Area = 0.830 ac, 90.36% Impervious, Inflow Depth > 8.60" for 100 YR event Inflow = 15.69 cfs @ 12.00 hrs, Volume= 0.595 of Primary = 15.69 cfs @ 12.00 hrs, Volume= 0.595 af, Atten= 0%, Lag= 0.0 min Primary outflow = inflow, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Link 8L: POA3 Hydrograph ® ITS ❑ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time [hoursy Post Type !I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 sln 06538 © 2017 HydroCAD Software Solutions LLC Paae 73 Hydrograph for Link 8L: POA3 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 0.25 0.00 0.00 0.00 0.50 0A0 0.00 0.00 0.75 OM 0.00 0.00 1.00 OM 0.00 0.00 1.25 0.00 0.00 0.00 1.50 0.01 0.00 0.01 1.75 0.02 OM 0.02 2.00 0.03 0.00 0.03 2.25 0.03 0.00 0.03 2.50 0.04 0.00 0.04 2.75 0.04 0.00 0.04 3.00 0.05 0.00 0.05 3.25 0.06 0.00 0.06 3.50 0.06 0.00 0.06 3.75 0.06 0.00 0.06 4.00 0.07 0.00 0.07 4.25 0.07 0.00 0.07 4.50 0.08 0.00 0.08 4.75 0.08 0.00 0.08 5.00 0.09 0.00 0.09 5.25 0.09 0.00 0.09 5.50 0.10 0.00 0.10 5.75 0.10 0.00 0.10 6.00 0.11 0.00 0.11 6.25 0.11 0.00 0.11 6.50 OA 2 0.00 0.12 6.75 OA 2 0.00 0.12 7.00 0.13 0.00 0.13 7.25 0.13 0.00 0.13 7.50 0.14 0.00 0.14 7.75 0.14 0.00 0.14 8.00 OA 5 0.00 0.15 8.25 0.15 0.00 0.15 8.50 0.17 0A0 0.17 8.75 OA 9 0.00 0.19 9.00 0.21 0.00 0.21 9.25 0.22 0.00 0.22 9.50 0.23 0.00 0.23 9.75 0.24 0.00 0.24 10.00 0.26 0.00 0.26 10.25 0.29 0.00 0.29 10.50 0.33 0.00 0.33 10.75 0.38 0.00 0.38 11.00 OA5 0.00 0.45 11.25 0.54 0.00 0.54 11.50 0.66 0.00 0.66 11.75 1.21 0.00 1.21 12.00 15.69 0.00 15.69 12.25 3.32 0.00 3.32 12.50 1.35 0.00 1.35 12.75 1.15 0.00 1.15 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 13.00 0.94 0.00 0.94 13.25 0.71 0.00 0.71 13.50 0.54 0.00 0.54 13.75 0.40 0.00 0.40 14.00 0.34 0.00 0.34 14.25 0.30 0.00 0.30 14.50 0.27 0.00 0.27 14.75 0.26 0.00 0.26 15.00 0.24 0.00 0.24 15.25 0.23 0.00 0.23 15.50 0.22 0.00 0.22 15.75 0.20 0.00 0.20 16.00 0.19 0.00 0.19 16.25 0.18 0.00 0.18 16.50 0.17 0.00 0.17 16.75 0.17 0.00 0.17 17.00 0.16 0.00 0.16 17.25 0.16 0.00 0.16 17.50 0.15 0.00 0.15 17.75 0.15 0.00 0.15 18.00 0.14 0.00 0.14 18.25 0.14 0.00 0.14 18.50 0.13 0.00 0.13 18.75 0.13 0.00 OA 3 19.00 0.12 0.00 OA 2 19.25 0.12 0.00 OA 2 19.50 0.12 0.00 OA 2 19.75 0.11 0.00 0.11 20.00 0.11 0.00 0.11 20.25 0.10 0.00 0.10 20.50 0.10 0.00 0.10 20.75 0.10 0.00 0.10 21.00 0.10 0.00 0.10 21.25 0.10 0.00 0.10 21.50 0.09 0.00 0.09 21.75 0.09 0.00 OM 22.00 0.09 0.00 0.09 22.25 0.09 0.00 0.09 22.50 0.09 0.00 0.09 22.75 0.09 0.00 0.09 23.00 0.09 0.00 0.09 23.25 0.09 0.00 OM 23.50 0.09 0.00 0.09 23.75 0.09 0.00 0.09 24.00 0.09 0.00 0.09