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HomeMy WebLinkAboutWPO201500055 Calculations 2015-11-20BRANCHLANDS MEMORY CARE & ASSISTED LIVING COUNTY OF ALBEMARLE, VIRGINIA VSMP PLAN DESIGN CALCULATIONS & NARRATIVE AUGUST 249 2015 REVISED: NOVEMBER 179 2015 .•0000 0 s TIMMONS GROUP YOUR VISION ACHIEVED THROUGH OURS Prepared by: Craig Kotarski, PE Timmons Group 9192 nd Street S. E. Charlottesville, VA 22901 434.327.1688 p.Liil ' �•� 1 0 CRX[GW J. KOTARSKT -' Lic. No. 0402048507 LIP- /I // I'D Z-:, �S, ]TVAL �sr� Table of Contents Section Title Project Narrative 2 Stormwater Quantity Calculations 3 Biofilter Sizing Calculations 4 LD 229 — Storm Sewer Design Computations 5 LD 204 — Storm Inlet Design Computations 6 Pre - Developed HydroCAD Calculations 7 Post - Developed HydroCAD Calculations 8 Virginia Runoff Reduction Method ReDevelopment Worksheet 9 Nutrient Credit Purchase Documentation Project Narrative: This project includes the construction of an assisted living facility and associated site work. Limits of disturbance are 1.36 acres. Water Quality: Currently there exists 0.73 acres of managed turf, 0.35 acres of forest, and 0.28 acres of impervious cover within the limits. In the proposed condition there will be 0.38 acres of managed turf and 0.98 acres of impervious cover. Per the Virginia Runoff Reduction Redevelopment Spreadsheet, this will required that 1.36 lbs of phosphorus be removed per year. A level 1 biofilter is being installed on the site. This biofilter is sized to treat 0.07 acres of impervious cover and 0.10 acres if managed turf. This will provided 0.11 lbs of phosphorus removal per year the remaining 1.27 lbs /yr shall be purchased from a nutrient bank. Water Quantity: The site consists of two drainage areas, one to the south and one to the west. Currently both areas enter a manmade storm sewer system, that discharges into an existing creek northwest of the site. This will be maintained in the post developed condition. However two underground storage systems are being installed to control the additional flow due to the increase in impervious area in the proposed condition. The post developed 2 year and 10 year flows are being reduced to be equal or less than the current 2 and 10 year flows. The drainage area of the existing creek upstream of this project it 768 acres, therefore channel and flood protection are adequate. Stormwater Quantity Summary: Pre Developed Area to the South Area = 0.55 acres Q2 = 1.74 cfs Qio = 3.22 cfs Qioo = 6.08 cfs Pre Developed Area to the West Area = 1.17 acres Q2 = 1.86 cfs Qio = 4.33 cfs Qioo = 9.67 cfs Post Developed Area to the South: Total Area = 0.79 acres Q2 =1.53 cfs Q10 =3.11 cfs Qioo =9.20 cfs Post Developed Area to the West: Total Area = 0.93 acres Q2= 1.61 cfs Qio = 4.30 cfs Qloo = 11.10 cfs Bioretention Sizing Calculations: Level 1 Bioretention (See VA DEQ Stormwater design specification NO.9 Bioretention for referenced equations.): The required treatment volume of the drainage area is shown on the Drainage Area A tab of the included runoff reduction spreadsheet. The required treatment volume is equal to 321 cu. ft. The storage depth is calculated as follows in accordance with the equation 9.1. Storage Depth = 2f t.* 0.25 + 1ft.* 0.40 + 0.5ft * 1.0 = 1.4 ft. Surface area for a Level 1 Bioretention determined by equation 9.3: (T„ — the volume reduced by an upstream BMP) SA(sq. f t.) = storage depth (ft) Where: SA = Minimum surface area of bioretention filter (sq. ft.) Tv = Treatment Volume (cu. ft.) SA(sq. f t.) = (321 (cu. f t.) — 0) 1.4 (ft) Required surface area of biofilter (sq. ft. ) = 229 (sq. f t. ) Surface area provided = 241 (sq. f t. ) ) � ! / ) k � < LLIk( /)\ 0 k 2 0 z ° k § 5 ! ) k / G 7k l�SS)§ / %l55j \5)) � ;2:22RR2la=, ]; / \� §25 LL W W w N Cf 2i N l f] f N Z O a f U W 2 fr ul I- 0 N S 0 0 w rc n IW 1111 �1 11 11 1 110 lalll 11111 1 Pre - Developed Area to the West 5ubcat Reach on Link Pre -West Prepared by TG- MOSYSCON HvdroCAD® 10.00 s/n 06538 © 2013 HvdroCAD Software Solutions LLC Area Listing (all nodes) Area (acres) CN Description (subcatchment- numbers) 0.520 61 >75% Grass cover, Good, HSG B (1 S) 0.300 98 Paved parking, HSG A (1 S) 0.350 55 Woods, Good, HSG B (1 S) 1.170 69 TOTAL AREA Printed 11/18/2015 Page 2 Pre -West Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 05538 © 2013 H droCAD Software Solutions LLC Page 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.300 HSG A is 0.870 HSG B is 0.000 HSG C 0.000 HSG D 0.000 Other 1.170 TOTAL AREA Pre -West Prepared by TG- MOSYSCON H droCADO 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Printed 11/18/2015 Page 4 Ground Covers (all nodes) HSG -A HSG -B HSG -C HSG -D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.520 0.000 0.000 0.000 0.520 >75% Grass cover, Good is 0.300 0.000 0.000 0.000 0.000 0.300 Paved parking is 0.000 0.350 0.000 0.000 0.000 0.350 Woods, Good 1S 0.300 0.870 0.000 0.000 0.000 1.170 TOTAL AREA Pre -West Type 11 24 -hr 1 -Year Rainfall = 3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 5 Time span =5.00 -20.00 hrs, dt =0.05 hrs, 301 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 1S: Pre -Developed Area to Runoff Area =1.170 ac 25.64% Impervious Runoff Depth >0.61" Flow Length =238' Tc =9.0 min CN =69 Runoff =1.15 cfs 0.059 of Total Runoff Area =1.170 ac Runoff Volume= 0.059 of Average Runoff Depth =0.61" 74.36% Pervious = 0.870 ac 25.649/6 Impervious = 0.300 ac Pre -West Type 11 24 -hr 1 -Year Rainfall = 3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 6 Summary for Subcatchment IS: Pre - Developed Area to the West Runoff = 1.15 cfs @ 12.02 hrs, Volume= 0.059 af, Depth> 0.61" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 5.00 -20.00 hrs, dt= 0.05 hrs Type II 24 -hr 1 -Year Rainfall= 3.03" Area (ac) CN Description 0.300 98 Paved parking, HSG A 0.520 61 >75% Grass cover, Good, HSG B 0.350 55 Woods, Good. HSG B 1.170 69 Weighted Average 0.870 74.36% Pervious Area 0.300 25.64% Impervious Area Tc Length Slope Velocity Capacity Description (min) feet ft/ft) (fUsec) (cfs 6.2 78 0.0830 0.21 Sheet Flow, Grass: Dense n= 0.240 P2= 3.66" 2.8 160 0.0180 0.94 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps N 0 LL 9.0 238 Total 0L 5 Subcatchment IS: Pre - Developed Area to the West Hydrograph Type II 24 -hr 1 -Year Rainfall-3.03" Runoff Area =1.170 ac Runoff Volume =0.059 of Runoff Depth >0.61" Flow Length =238' Tc =9.0 min XTIEDES 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) ■ Runoff Pre -West Type 11 24 -hr 1 -Year Rainfall = 3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 7 Hydrograph for Subcatchment 1S: Pre - Developed Area to the West Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.36 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.49 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.00 0.00 10.75 0.66 0.00 0.00 11.00 0.71 0.00 0.00 11.25 0.78 0.00 0.00 11.50 0.86 0.00 0.00 11.75 1.17 0.02 0.05 12.00 2.01 0.22 1.13 12.25 2.14 0.27 0.28 12.50 2.23 0.30 0.17 12.75 2.29 0.33 0.12 13.00 2.34 0.35 0.10 13.25 2.38 0.37 0.09 13.50 2.42 0.39 0.08 13.75 2.45 0.40 0.07 14.00 2.48 0.41 0.06 14.25 2.51 0.43 0.06 14.50 2.54 0.44 0.06 14.75 2.56 0.45 0.05 15.00 2.59 0.46 0.05 15.25 2.61 0.47 0.05 15.50 2.63 0.48 0.05 15.75 2.65 0.49 0.04 16.00 2.67 0.50 0.04 16.25 2.68 0.51 0.04 16.50 2.70 0.52 0.04 16.75 2.72 0.52 0.04 17.00 2.73 0.53 0.04 17.25 2.75 0.54 0.04 17.50 2.76 0.55 0.03 17.75 2.78 0.55 0.03 Time Precip. Excess Runoff (hours) inches (inches) cfs 18.00 2.79 0.56 0.03 18.25 2.80 0.57 0.03 18.50 2.82 0.57 0.03 18.75 2.83 0.58 0.03 19.00 2.84 0.59 0.03 19.25 2.85 0.59 0.03 19.50 2.86 0.60 0.03 19.75 2.87 0.60 0.03 20.00 2.88 0.61 0.02 Pre -West Type// 24 -hr 2 -Year Rainfall = 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 8 Time span =5.00 -20.00 hrs, dt =0.05 hrs, 301 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 1S: Pre -Developed Area to Runoff Area =1.170 ac 25.64% Impervious Runoff Depth >0.94" Flow Length =238' Tc =9.0 min CN =69 Runoff =1.86 cfs 0.092 of Total Runoff Area =1.170 ac Runoff Volume = 0.092 of Average Runoff Depth = 0.94" 74.36% Pervious = 0.870 ac 25.64% Impervious = 0.300 ac Pre -West Type// 24 -hr 2 -Year Rainfall = 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 9 Summary for Subcatchment 1S: Pre - Developed Area to the West Runoff = 1.86 cfs @ 12.01 hrs, Volume= 0.092 af, Depth> 0.94" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 5.00 -20.00 hrs, dt= 0.05 hrs Type II 24 -hr 2 -Year Rainfall= 3.66" Area ac CN Description 0.300 98 Paved parking, HSG A 0.520 61 >75% Grass cover, Good, HSG B 0.350 55 Woods, Good, HSG B 1.170 69 Weighted Average 0.870 74.36% Pervious Area 0.300 25.64% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (fUsec) (cfs) 6.2 78 0.0830 0.21 Sheet Flow, Grass: Dense n= 0.240 P2= 3.66" 2.8 160 0.0180 0.94 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0 LL 9.0 238 Total 2 OF 5 Subcatchment 1 S: Pre - Developed Area to the West Hydrograph Type II 24 -hr 2 -Year Rainfall= 3.66" Runoff Area =1.170 ac Runoff Volume =0.092 of Runoff Depth >0.94" Flow Length =238' Tc =9.0 min CN =69 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Runoff Pre -West Type// 24 -hr 2 -Year Rainfall = 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 HvdroCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 10 Hydrograph for Subcatchment 1S: Pre - Developed Area to the West Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 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 0.34 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 0.48 0.00 0.00 8.75 0.51 0.00 0.00 9.00 0.54 0.00 0.00 9.25 0.57 0.00 0.00 9.50 0.60 0.00 0.00 9.75 0.63 0.00 0.00 10.00 0.66 0.00 0.00 10.25 0.70 0.00 0.00 10.50 0.75 0.00 0.00 10.75 0.80 0.00 0.00 11.00 0.86 0.00 0.00 11.25 0.94 0.00 0.00 11.50 1.04 0.00 0.02 11.75 1.42 0.05 0.20 12.00 2.43 0.39 1.84 12.25 2.58 0.46 0.42 12.50 2.69 0.51 0.25 12.75 2.76 0.55 0.17 13.00 2.83 0.58 0.15 13.25 2.88 0.61 0.13 13.50 2.92 0.63 0.11 13.75 2.97 0.65 0.10 14.00 3.00 0.67 0.09 14.25 3.03 0.69 0.08 14.50 3.07 0.71 0.08 14.75 3.10 0.72 0.08 15.00 3.12 0.74 0.07 15.25 3.15 0.75 0.07 15.50 3.18 0.77 0.07 15.75 3.20 0.78 0.06 16.00 3.22 0.79 0.06 16.25 3.24 0.80 0.06 16.50 3.26 0.81 0.05 16.75 3.28 0.83 0.05 17.00 3.30 0.84 0.05 17.25 3.32 0.85 0.05 17.50 3.34 0.86 0.05 17.75 3.35 0.87 0.05 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 3.37 0.88 0.05 18.25 3.39 0.89 0.04 18.50 3.40 0.90 0.04 18.75 3.42 0.91 0.04 19.00 3.43 0.91 0.04 19.25 3.45 0.92 0.04 19.50 3.46 0.93 0.04 19.75 3.47 0.94 0.04 20.00 3.48 0.94 0.03 Pre -West Type 11 24 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCADO 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page 11 Time span =5.00 -20.00 hrs, dt =0.05 hrs, 301 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 1S: Pre - Developed Area to Runoff Area =1.170 ac 25.64% Impervious Runoff Depth >2.15" Flow Length =238' Tc =9.0 min CN =69 Runoff =4.33 cfs 0.209 of Total Runoff Area = 1.170 ac Runoff Volume = 0.209 of Average Runoff Depth = 2.15" 74.36% Pervious = 0.870 ac 25.640/6 Impervious = 0.300 ac Pre -West Type 11 24 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 ydroCAD@ 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 12 Summary for Subcatchment 1 S: Pre - Developed Area to the West Runoff = 4.33 cfs @ 12.01 hrs, Volume= 0.209 af, Depth> 2.15" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 5.00 -20.00 hrs, dt= 0.05 hrs Type II 24 -hr 10 -Year Rainfall= 5.53" Area (ac) CN Description 0.300 98 Paved parking, HSG A 0.520 61 >75% Grass cover, Good, HSG B 0.350 55 Woods, Good, HSG B 1.170 69 Weighted Average 0.870 0.21 74.36% Pervious Area 0.300 25.64% Impervious Area Tc Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 6.2 78 0.0830 0.21 Sheet Flow, Grass: Dense n= 0.240 P2= 3.66" 2.8 160 0.0180 0.94 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 9.0 238 Total Subcatchment 1S: Pre - Developed Area to the West Hydrograph Runoff Type II 24 -hr 10 -Year Rainfall = 5.53" Runoff Area =1.170 ac Runoff Volume =0.209 of Runoff Depth >2.15" LL 2 Flow Length =238' Tc =9.0 min CN =69 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pre -West Type 11 24 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 13 Hydrograph for Subcatchment 1 S: Pre - Developed Area to the West Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.39 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.44 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.49 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 0.60 0.00 0.00 7.75 0.63 0.00 0.00 8.00 0.66 0.00 0.00 8.25 0.70 0.00 0.00 8.50 0.73 0.00 0.00 8.75 0.77 0.00 0.00 9.00 0.81 0.00 0.00 9.25 0.86 0.00 0.00 9.50 0.90 0.00 0.00 9.75 0.95 0.00 0.00 10.00 1.00 0.00 0.01 10.25 1.06 0.01 0.02 10.50 1.13 0.01 0.03 10.75 1.21 0.02 0.04 11.00 1.30 0.03 0.06 11.25 1.42 0.05 0.09 11.50 1.56 0.09 0.15 11.75 2.14 0.27 0.77 12.00 3.67 1.06 4.31 12.25 3.90 1.21 0.88 12.50 4.06 1.31 0.50 12.75 4.18 1.38 0.35 13.00 4.27 1.44 0.30 13.25 4.35 1.50 0.26 13.50 4.42 1.55 0.23 13.75 4.48 1.59 0.20 14.00 4.53 1.63 0.18 14.25 4.58 1.66 0.16 14.50 4.63 1.69 0.16 14.75 4.68 1.73 0.15 15.00 4.72 1.76 0.14 15.25 4.76 1.78 0.14 15.50 4.80 1.81 0.13 15.75 4.83 1.84 0.12 16.00 4.87 1.86 0.11 16.25 4.90 1.88 0.11 16.50 4.93 1.91 0.10 16.75 4.96 1.93 0.10 17.00 4.99 1.95 0.10 17.25 5.01 1.97 0.10 17.50 5.04 1.99 0.09 17.75 5.07 2.01 0.09 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 5.09 2.03 0.09 18.25 5.12 2.04 0.08 18.50 5.14 2.06 0.08 18.75 5.16 2.08 0.08 19.00 5.19 2.09 0.08 19.25 5.21 2.11 0.07 19.50 5.23 2.12 0.07 19.75 5.25 2.14 0.07 20.00 5.26 2.15 0.06 Pre -West Type// 24 -hr 100 -Year Rainfall = 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD0 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 14 Time span =5.00 -20.00 hrs, dt =0.05 hrs, 301 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 1S: Pre -Developed Area to Runoff Area =1.170 ac 25.64% Impervious Runoff Depth >4.89" Flow Length =238' Tc =9.0 min CN =69 Runoff =9.67 cfs 0.477 of Total Runoff Area = 1.170 ac Runoff Volume = 0.477 of Average Runoff Depth = 4.89" 74.36% Pervious = 0.870 ac 25.64% Impervious - 0.300 ac Pre -West Type 1124 -hr 100 -Year Rainfall= 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 15 Summary for Subcatchment 1 S: Pre - Developed Area to the West Runoff = 9.67 cfs @ 12.00 hrs, Volume= 0.477 af, Depth> 4.89" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 5.00 -20.00 hrs, dt= 0.05 hrs Type II 24 -hr 100 -Year Rainfall= 9.08" Area (ac) CN Description 0.300 98 Paved parking, HSG A 0.520 61 >75% Grass cover, Good, HSG B 0.350 55 Woods, Good, HSG B 1.170 69 Weighted Average 0.870 0.21 74.36% Pervious Area 0.300 25.64% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.2 78 0.0830 0.21 Sheet Flow, Grass: Dense n= 0.240 P2= 3.66" 2.8 160 0.0180 0.94 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 9.0 238 Total Subcatchment 1S: Pre - Developed Area to the West Hydrograph ■ Runoff 10 4' a cli Type II 24 -hr g 100 -Year Rainfall= 9.08" 8.. Runoff Area =1.170 ac Runoff Volume =0.477 of 6 Runoff Depth >4.89" U. Flow Length =238' 4 Tc =9.0 min 3 - CN =69 KA 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pre -West Type 11 24 -hr 100 -Year Rainfall = 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page: 16 Hydrograph for Subcatchment 1 S: Pre - Developed Area to the West Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.57 0.00 0.00 5.25 0.61 0.00 0.00 5.50 0.65 0.00 0.00 5.75 0.69 0.00 0.00 6.00 0.73 0.00 0.00 6.25 0.77 0.00 0.00 6.50 0.81 0.00 0.00 6.75 0.85 0.00 0.00 7.00 0.90 0.00 0.00 7.25 0.94 0.00 0.00 7.50 0.99 0.00 0.01 7.75 1.04 0.00 0.01 8.00 1.09 0.01 0.02 8.25 1.14 0.01 0.02 8.50 1.20 0.02 0.03 8.75 1.26 0.03 0.04 9.00 1.33 0.04 0.05 9.25 1.41 0.05 0.06 9.50 1.48 0.07 0.07 9.75 1.56 0.08 0.08 10.00 1.64 0.11 0.10 10.25 1.74 0.13 0.13 10.50 1.85 0.17 0.16 10.75 1.98 0.21 0.20 11.00 2.13 0.27 0.26 11.25 2.32 0.34 0.36 11.50 2.57 0.45 0.51 11.75 3.51 0.96 2.21 12.00 6.02 2.73 9.66 12.25 6.41 3.04 1.84 12.50 6.67 3.25 1.02 12.75 6.86 3.40 0.71 13.00 7.01 3.52 0.60 13.25 7.14 3.63 0.51 13.50 7.25 3.72 0.45 13.75 7.36 3.81 0.40 14.00 7.45 3.88 0.35 14.25 7.53 3.95 0.32 14.50 7.61 4.02 0.31 14.75 7.68 4.08 0.29 15.00 7.75 4.14 0.28 15.25 7.82 4.19 0.26 15.50 7.88 4.25 0.25 15.75 7.94 4.30 0.23 16.00 7.99 4.34 0.22 16.25 8.04 4.39 0.21 16.50 8.09 4.43 0.20 16.75 8.14 4.47 0.20 17.00 8.19 4.51 0.19 17.25 8.23 4.55 0.19 17.50 8.28 4.59 0.18 17.75 8.32 4.62 0.17 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 8.36 4.66 0.17 18.25 8.40 4.69 0.16 18.50 8.44 4.73 0.16 18.75 8.48 4.76 0.15 19.00 8.51 4.79 0.15 19.25 8.55 4.82 0.14 19.50 8.58 4.85 0.14 19.75 8.61 4.88 0.13 20.00 8.64 4.90 0.12 Pre - Developed Area to South 5 Reach on Link Pre -South Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD@ 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment- numbers) 0.250 61 >75% Grass cover, Good, HSG B (2S) 0.300 98 Paved parking, HSG A (2S) 0.550 81 TOTAL AREA Pre -South Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.300 HSG A 2S 0.250 HSG B 2S 0.000 HSG C 0.000 HSG D 0.000 Other 0.550 TOTAL AREA Pre -South Prepared by TG- MOSYSCON HvdroCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Printed 11/18/2015 Page 4 Ground Covers (all nodes) HSG -A HSG -B HSG -C HSG -D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.250 0.000 0.000 0.000 0.250 >75% Grass cover, Good 2S 0.300 0.000 0.000 0.000 0.000 0.300 Paved parking 2S 0.300 0.250 0.000 0.000 0.000 0.550 TOTAL AREA Pre -South Type 11 24 -hr 1 -Year Rainfall =3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page 5 Time span =5.00 -20.00 hrs, dt =0.05 hrs, 301 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 2S: Pre - Developed Area to Runoff Area =0.550 ac 54.55% Impervious Runoff Depth >1.22" Tc =6.0 min CN =81 Runoff =1.28 cfs 0.056 of Total Runoff Area = 0.550 ac Runoff Volume = 0.056 of Average Runoff Depth =1.22" 45.45% Pervious = 0.250 ac 54.55% Impervious = 0.300 ac Pre -South Type 11 24 -hr 1 -Year Rainfall = 3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAQ ft 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC _ Page 6 Summary for Subcatchment 2S: Pre - Developed Area to South Runoff = 1.28 cfs @ 11.98 hrs, Volume= 0.056 af, Depth> 1.22" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 5.00 -20.00 hrs, dt= 0.05 hrs Type II 24 -hr 1 -Year Rainfall= 3.03" Area (ac) CN Description 0.300 98 Paved parking, HSG A 0.250 61 >75% Grass cover, Good, HSG B 0.550 81 Weighted Average 0.250 45.45% Pervious Area 0.300 54.55% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) _ 6.0 Direct Entry, a LL 1 0k 5 Subcatchment 2S: Pre - Developed Area to South Hydrograph fflqsM Type II 24 -hr 1 -Year Rainfall= 3.03" Runoff Area =0.550 ac Runoff Volume =0.056 of Runoff Depth >1.22" Tc =60 min CN =81 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Ci Ruraif Pre -South Type 11 24 -hr 1 -Year Rainfall = 3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 7 Hydrograph for Subcatchment 2S: Pre - Developed Area to South Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.19 0.00 _(cfs) 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 0.49 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.01 0.01 10.50 0.62 0.01 0.01 10.75 0.66 0.01 0.01 11.00 0.71 0.02 0.02 11.25 0.78 0.04 0.03 11.50 0.86 0.06 0.05 11.75 1.17 0.16 0.29 12.00 2.01 0.61 1.23 12.25 2.14 0.69 0.18 12.50 2.23 0.75 0.12 12.75 2.29 0.79 0.09 13.00 2.34 0.83 0.08 13.25 2.38 0.86 0.07 13.50 2.42 0.89 0.06 13.75 2.45 0.91 0.05 14.00 2.48 0.93 0.05 14.25 2.51 0.95 0.04 14.50 2.54 0.97 0.04 14.75 2.56 0.99 0.04 15.00 2.59 1.00 0.04 15.25 2.61 1.02 0.04 15.50 2.63 1.04 0.03 15.75 2.65 1.05 0.03 16.00 2.67 1.06 0.03 16.25 2.68 1.08 0.03 16.50 2.70 1.09 0.03 16.75 2.72 1.10 0.03 17.00 2.73 1.11 0.03 17.25 2.75 1.12 0.03 17.50 2.76 1.13 0.02 17.75 2.78 1.14 0.02 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 2.79 1.15 0.02 18.25 2.80 1.16 0.02 18.50 2.82 1.17 0.02 18.75 2.83 1.18 0.02 19.00 2.84 1.19 0.02 19.25 2.85 1.20 0.02 19.50 2.86 1.21 0.02 19.75 2.87 1.22 0.02 20.00 2.88 1.23 0.02 Pre -South Type 11 24 -hr 2 -Year Rainfall = 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 8 Time span =5.00 -20.00 hrs, dt =0.05 hrs, 301 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 2S: Pre - Developed Area to Runoff Area =0.550 ac 54.55% Impervious Runoff Depth >1.69" Tc =6.0 min CN =81 Runoff =1.74 cfs 0.078 of Total Runoff Area = 0.550 ac Runoff Volume = 0.078 of Average Runoff Depth = 1.69" 45.45% Pervious = 0.250 ac 54.55% Impervious = 0.300 ac Pre -South Type// 24 -hr 2 -Year Rainfall = 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 9 Summary for Subcatchment 2S: Pre - Developed Area to South Runoff = 1.74 cfs @ 11.97 hrs, Volume= 0.078 af, Depth> 1.69" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 5.00 -20.00 hrs, dt= 0.05 hrs Type II 24 -hr 2 -Year Rainfall= 3.66" Area (ac) CN Description 0.300 98 Paved parking, HSG A 0.250 61 >75% Grass cover, Good. HSG B 0.550 81 Weighted Average 0.250 45.45% Pervious Area 0.300 54.55% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) ft/ft) (ft/sec) cfs) 6.0 Direct Entry, N 3 0 LL Y 5 Subcatchment 2S: Pre - Developed Area to South Hydrograph Type II 24 -hr 2 -Year Rainfall= 3.66" Runoff Area =0.550 ac Runoff Volume =0.078 of Runoff Depth >1.69" Tc =6.0 min CN =81 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Runoff Pre -South Type// 24 -hr 2 -Year Rainfall= 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD0 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 10 Hydrograph for Subcatchment 2S: Pre - Developed Area to South Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 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 0.34 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 0.48 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 0.01 0.01 9.75 0.63 0.01 0.01 10.00 0.66 0.01 0.01 10.25 0.70 0.02 0.01 10.50 0.75 0.03 0.02 10.75 0.80 0.04 0.03 11.00 0.86 0.06 0.04 11.25 0.94 0.08 0.05 11.50 1.04 0.11 0.08 11.75 1.42 0.27 0.43 12.00 2.43 0.89 1.67 12.25 2.58 1.00 0.25 12.50 2.69 1.08 0.16 12.75 2.76 1.13 0.12 13.00 2.83 1.18 0.10 13.25 2.88 1.22 0.09 13.50 2.92 1.26 0.08 13.75 2.97 1.29 0.07 14.00 3.00 1.31 0.06 14.25 3.03 1.34 0.06 14.50 3.07 1.36 0.05 14.75 3.10 1.39 0.05 15.00 3.12 1.41 0.05 15.25 3.15 1.43 0.05 15.50 3.18 1.45 0.04 15.75 3.20 1.47 0.04 16.00 3.22 1.49 0.04 16.25 3.24 1.50 0.04 16.50 3.26 1.52 0.04 16.75 3.28 1.53 0.03 17.00 3.30 1.55 0.03 17.25 3.32 1.56 0.03 17.50 3.34 1.58 0.03 17.75 3.35 1.59 0.03 Time Precip. Excess Runoff hours finches) (inches) (Cfs) 18.00 3.37 1.60 0.03 18.25 3.39 1.62 0.03 18.50 3.40 1.63 0.03 18.75 3.42 1.64 0.03 19.00 3.43 1.65 0.03 19.25 3.45 1.66 0.02 19.50 3.46 1.68 0.02 19.75 3.47 1.69 0.02 20.00 3.48 1.70 0.02 Pre -South Type 11 24 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Pane 11 Time span =5.00 -20.00 hrs, dt =0.05 hrs, 301 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 2S: Pre - Developed Area to Runoff Area =0.550 ac 54.55% Impervious Runoff Depth >3.22" Tc =6.0 min CN =81 Runoff =3.22 cfs 0.147 of Total Runoff Area = 0.550 ac Runoff Volume = 0.147 of Average Runoff Depth = 3.22" 45.45% Pervious = 0.250 ac 54.55% Impervious = 0.300 ac Pre -South Type 11 24 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 12 Summary for Subcatchment 2S: Pre - Developed Area to South Runoff = 3.22 cfs @ 11.97 hrs, Volume= 0.147 af, Depth> 3.22" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 5.00 -20.00 hrs, dt= 0.05 hrs Type II 24 -hr 10 -Year Rainfall = 5.53" Area ac CN Description 0.300 98 Paved parking, HSG A 0.250 61 >75% Grass cover, Good, HSG B 0.550 81 Weighted Average 0.250 45.45% Pervious Area 0.300 54.55% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 2S: Pre - Developed Area to South Hydrograph ■ Runoff Type II 24 -hr 10 -Year Rainfall = 5.53" Runoff Area =0.550 ac Runoff Volume= 0.147 of 2 j r Runoff Depth >3.22" LL Tc =6.0 min CNT81 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pre -South Type 11 24 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 13 Hydrograph for Subcatchment 2S: Pre - Developed Area to South Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.39 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.44 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.49 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 0.60 0.01 0.01 7.75 0.63 0.01 0.01 8.00 0.66 0.01 0.01 8.25 0.70 0.02 0.01 8.50 0.73 0.03 0.01 8.75 0.77 0.03 0.02 9.00 0.81 0.04 0.02 9.25 0.86 0.06 0.03 9.50 0.90 0.07 0.03 9.75 0.95 0.08 0.03 10.00 1.00 0.10 0.04 10.25 1.06 0.12 0.05 10.50 1.13 0.14 0.06 10.75 1.21 0.18 0.07 11.00 1.30 0.22 0.09 11.25 1.42 0.27 0.13 11.50 1.56 0.35 0.18 11.75 2.14 0.70 0.92 12.00 3.67 1.84 3.04 12.25 3.90 2.04 0.43 12.50 4.06 2.18 0.28 12.75 4.18 2.27 0.21 13.00 4.27 2.35 0.17 13.25 4.35 2.42 0.15 13.50 4.42 2.48 0.13 13.75 4.48 2.53 0.12 14.00 4.53 2.58 0.10 14.25 4.58 2.62 0.10 14.50 4.63 2.66 0.09 14.75 4.68 2.70 0.09 15.00 4.72 2.74 0.08 15.25 4.76 2.77 0.08 15.50 4.80 2.81 0.07 15.75 4.83 2.84 0.07 16.00 4.87 2.87 0.06 16.25 4.90 2.90 0.06 16.50 4.93 2.92 0.06 16.75 4.96 2.95 0.06 17.00 4.99 2.97 0.06 17.25 5.01 3.00 0.05 17.50 5.04 3.02 0.05 17.75 5.07 3.05 0.05 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 5.09 3.07 0.05 18.25 5.12 3.09 0.05 18.50 5.14 3.11 0.05 18.75 5.16 3.13 0.04 19.00 5.19 3.15 0.04 19.25 5.21 3.17 0.04 19.50 5.23 3.19 0.04 19.75 5.25 3.20 0.04 20.00 5.26 3.22 0.04 Pre -South Type 1124 -hr 100 -Year Rainfall = 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD@ 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 14 Time span =5.00 -20.00 hrs, dt =0.05 hrs, 301 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 2S: Pre - Developed Area to Runoff Area =0.550 ac 54.55% Impervious Runoff Depth >6.34" Tc =6.0 min CN =81 Runoff =6.08 cfs 0.291 of Total Runoff Area = 0.550 ac Runoff Volume = 0.291 of Average Runoff Depth = 6.34" 45.45% Pervious = 0.250 ac 54.55% Impervious = 0.300 ac Pre -South Type 11 24 -hr 100 -Year Rainfall= 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 15 Summary for Subcatchment 2S: Pre - Developed Area to South Runoff = 6.08 cfs @ 11.97 hrs, Volume= 0.291 af, Depth> 6.34" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 5.00 -20.00 hrs, dt= 0.05 hrs Type II 24 -hr 100 -Year Rainfall= 9.08" Area (ac) CN Description 0.300 98 Paved parking, HSG A 0.250 61 >75% Grass cover, Good, HSG B 0.550 81 Weighted Average 0.250 45.45% Pervious Area 0.300 54.55% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 2S: Pre - Developed Area to South Hydrograph Runoff 6 Type II 24 -hr 100 -Year Rainfall= 9.08" 5 Runoff Area =0.550 ac Runoff Volume = 0.291 of Runoff Depth >6.34" 3 Tc =60 min CN =81 2 0 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pre -South Type // 24 -hr 100 -Year Rainfall = 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 16 Hydrograph for Subcatchment 2S: Pre - Developed Area to South Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.57 0.00 0.01 5.25 0.61 0.01 0.01 5.50 0.65 0.01 0.01 5.75 0.69 0.02 0.01 6.00 0.73 0.03 0.02 6.25 0.77 0.03 0.02 6.50 0.81 0.04 0.02 6.75 0.85 0.05 0.02 7.00 0.90 0.07 0.03 7.25 0.94 0.08 0.03 7.50 0.99 0.10 0.03 7.75 1.04 0.11 0.04 8.00 1.09 0.13 0.04 8.25 1.14 0.15 0.05 8.50 1.20 0.17 0.05 8.75 1.26 0.20 0.06 9.00 1.33 0.23 0.07 9.25 1.41 0.27 0.08 9.50 1.48 0.30 0.08 9.75 1.56 0.34 0.09 10.00 1.64 0.39 0.11 10.25 1.74 0.45 0.13 10.50 1.85 0.51 0.15 10.75 1.98 0.59 0.18 11.00 2.13 0.69 0.22 11.25 2.32 0.82 0.30 11.50 2.57 0.99 0.40 11.75 3.51 1.72 1.92 12.00 6.02 3.90 5.69 12.25 6.41 4.26 0.78 12.50 6.67 4.50 0.50 12.75 6.86 4.67 0.37 13.00 7.01 4.81 0.31 13.25 7.14 4.94 0.27 13.50 7.25 5.04 0.23 13.75 7.36 5.14 0.21 14.00 7.45 5.22 0.18 14.25 7.53 5.30 0.17 14.50 7.61 5.37 0.16 14.75 7.68 5.44 0.15 15.00 7.75 5.51 0.15 15.25 7.82 5.57 0.14 15.50 7.88 5.63 0.13 15.75 7.94 5.68 0.12 16.00 7.99 5.73 0.11 16.25 8.04 5.78 0.11 16.50 8.09 5.83 0.10 16.75 8.14 5.88 0.10 17.00 8.19 5.92 0.10 17.25 8.23 5.96 0.10 17.50 8.28 6.01 0.09 17.75 8.32 6.05 0.09 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 8.36 6.09 0.09 18.25 8.40 6.12 0.08 18.50 8.44 6.16 0.08 18.75 8.48 6.20 0.08 19.00 8.51 6.23 0.08 19.25 8.55 6.26 0.07 19.50 8.58 6.29 0.07 19.75 8.61 6.32 0.07 20.00 8.64 6.35 0.06 7S Post - Developed A a to 5S Post-Developed Area to West Routed A West 8L (new Link) 5ubcat (Reach vn Link StormTech Post -West Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 HvdroCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment- numbers) 0.300 61 >75% Grass cover, Good, HSG B (5S, 7S) 0.630 98 Paved parking, HSG B (5S, 7S) 0.930 86 TOTAL AREA Post -West Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD@) 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.930 HSG B 5S, 7S 0.000 HSG C 0.000 HSG D 0.000 Other 0.930 TOTAL AREA Post -West Prepared by TG- MOSYSCON H droCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Printed 11/18/2015 Pa e 4 Ground Covers (all nodes) HSG -A HSG -B HSG -C HSG -D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.300 0.000 0.000 0.000 0.300 >75% Grass cover, Good 5S, 7S 0.000 0.630 0.000 0.000 0.000 0.630 Paved parking 5S, 7S 0.000 0.930 0.000 0.000 0.000 0.930 TOTAL AREA Post -West Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCADO 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Paae 5 Pipe Listing (all nodes) Line# Node In- Invert Out - Invert Length Slope n Diam/Width Height Inside -Fill Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) 1 6P 421.20 420.70 50.0 0.0100 0.013 15.0 0.0 0.0 Post -West Type 11 24 -hr 1 -Year Rainfall= 3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 HvdroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Paae 6 Time span =0.00 -24.00 hrs, dt =0.01 hrs, 2401 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 5S: Post - Developed Area to Runoff Area =0.470 ac 91.49% Impervious Runoff Depth >2.48" Tc =6.0 min CN =95 Runoff =1.90 cfs 0.097 of Subcatchment 7S: Post - Developed Area to Runoff Area =0.460 ac 43.48% Impervious Runoff Depth >1.09" Tc =6.0 min CN =77 Runoff =0.90 cfs 0.042 of Pond 6P: ADS StormTech Peak Elev= 423.38' Storage =1,619 cf Inflow =1.90 cfs 0.097 of Outflow =0.34 cfs 0.095 of Link 8L: (new Link) Inflow =1.18 cfs 0.137 of Primary=1.18 cfs 0.137 of Total Runoff Area = 0.930 ac Runoff Volume = 0.139 of Average Runoff Depth = 1.79" 32.26% Pervious = 0.300 ac 67.74% Impervious = 0.630 ac Post -West Type// 24 -hr 1 -Year Rainfall =3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 7 Summary for Subcatchment 5S: Post - Developed Area to West Routed Runoff = 1.90 cfs @ 11.97 hrs, Volume= 0.097 af, Depth> 2.48" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 1 -Year Rainfall= 3.03" Area (ac) CN Descriotion 0.430 98 Paved parking, HSG B 0.040 61 >75% Grass cover, Good, HSG B 0.470 95 Weighted Average 0.040 8.51 % Pervious Area 0.430 91.49% Impervious Area Tc Length Slope Velocity Capacity Description min (feet) ft/ft ft/sec cfs 6.0 Direct Entry, 2 N 0 LL Subcatchment 5S: Post - Developed Area to West Routed Hydrograph Time (hours) Type II 24 -hr 1 -Year Rainfall= 3.03" Runoff Area =0.470 ac Runoff Volume =0.097 of Runoff Depth >2.48" Tc =6.0 min CN =95 Runoff Post -West Type 11 24 -hr 1 -Year Rainfall = 3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 8 Hydrograph for Subcatchment 5S: Post - Developed Area to West Routed Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.03 0.00 0.00 1.50 0.05 0.00 0.00 2.00 0.07 0.00 0.00 2.50 0.09 0.00 0.00 3.00 0.10 0.00 0.00 3.50 0.12 0.00 0.00 4.00 0.15 0.00 0.00 4.50 0.17 0.01 0.00 5.00 0.19 0.01 0.01 5.50 0.22 0.02 0.01 6.00 0.24 0.03 0.01 6.50 0.27 0.04 0.01 7.00 0.30 0.05 0.01 7.50 0.33 0.07 0.02 8.00 0.36 0.09 0.02 8.50 0.40 0.11 0.02 9.00 0.45 0.13 0.03 9.50 0.49 0.17 0.03 10.00 0.55 0.20 0.04 10.50 0.62 0.25 0.05 11.00 0.71 0.32 0.08 11.50 0.86 0.44 0.13 12.00 2.01 1.49 1.74 12.50 2.23 1.70 0.15 13.00 2.34 1.81 0.09 13.50 2.42 1.89 0.07 14.00 2.48 1.95 0.05 14.50 2.54 2.00 0.05 15.00 2.59 2.05 0.04 15.50 2.63 2.09 0.04 16.00 2.67 2.12 0.03 16.50 2.70 2.16 0.03 17.00 2.73 2.19 0.03 17.50 2.76 2.22 0.03 18.00 2.79 2.25 0.03 18.50 2.82 2.27 0.02 19.00 2.84 2.29 0.02 19.50 2.86 2.32 0.02 20.00 2.88 2.34 0.02 20.50 2.90 2.36 0.02 21.00 2.92 2.37 0.02 21.50 2.94 2.39 0.02 22.00 2.96 2.41 0.02 22.50 2.98 2.43 0.02 23.00 3.00 2.45 0.02 23.50 3.01 2.46 0.02 24.00 3.03 2.48 0.02 Post -West Type 11 24 -hr 1 -Year Rainfall =3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCADO 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 9 Summary for Subcatchment 7S: Post - Developed Area to West Runoff = 0.90 cfs @ 11.98 hrs, Volume= 0.042 af, Depth> 1.09" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 1 -Year Rainfall= 3.03" Area (ac) CN Description 0.200 98 Paved parking, HSG B 0.260 61 >75% Grass cover, Good, HSG B 0.460 77 Weighted Average 0.260 56.52% Pervious Area 0.200 43.48% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (fUft) ft/sec) (cfs) 6.0 Direct Entry, N 3 0 LL Subcatchment 7S: Post - Developed Area to West Hydrograph Type 11 24-hr 1 -Year Rainfall= 3.03" Runoff Area =0.460 ac Runoff Volume =0.042 of Runoff Depth >1.09" Tc =6.0 min CN =77 nr�.r �rrEnrifrrErrrE� .FrEiEFSr�frFf.� ^ 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 -West Type 11 24 -hr 1 -Year Rainfall =3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCADD 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 10 Hydrograph for Subcatchment 7S: Post - Developed Area to West Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.03 0.00 0.00 1.50 0.05 0.00 0.00 2.00 0.07 0.00 0.00 2.50 0.09 0.00 0.00 3.00 0.10 0.00 0.00 3.50 0.12 0.00 0.00 4.00 0.15 0.00 0.00 4.50 0.17 0.00 0.00 5.00 0.19 0.00 0.00 5.50 0.22 0.00 0.00 6.00 0.24 0.00 0.00 6.50 0.27 0.00 0.00 7.00 0.30 0.00 0.00 7.50 0.33 0.00 0.00 8.00 0.36 0.00 0.00 8.50 0.40 0.00 0.00 9.00 0.45 0.00 0.00 9.50 0.49 0.00 0.00 10.00 0.55 0.00 0.00 10.50 0.62 0.00 0.00 11.00 0.71 0.00 0.01 11.50 0.86 0.02 0.02 12.00 2.01 0.45 0.86 12.50 2.23 0.58 0.09 13.00 2.34 0.64 0.06 13.50 2.42 0.69 0.04 14.00 2.48 0.73 0.03 14.50 2.54 0.76 0.03 15.00 2.59 0.79 0.03 15.50 2.63 0.82 0.02 16.00 2.67 0.85 0.02 16.50 2.70 0.87 0.02 17.00 2.73 0.89 0.02 17.50 2.76 0.91 0.02 18.00 2.79 0.93 0.02 18.50 2.82 0.95 0.02 19.00 2.84 0.96 0.01 19.50 2.86 0.98 0.01 20.00 2.88 0.99 0.01 20.50 2.90 1.01 0.01 21.00 2.92 1.02 0.01 21.50 2.94 1.03 0.01 22.00 2.96 1.04 0.01 22.50 2.98 1.06 0.01 23.00 3.00 1.07 0.01 23.50 3.01 1.08 0.01 24.00 3.03 1.09 0.01 Post -West Type// 24 -hr 1 -Year Rainfall= 3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 11 Summary for Pond 6P: ADS StormTech Inflow Area = 0.470 ac, 91.49% Impervious, Inflow Depth > 2.48" for 1 -Year event Inflow = 1.90 cfs @ 11.97 hrs, Volume= 0.097 of Outflow = 0.34 cfs @ 12.15 hrs, Volume= 0.095 af, Atten= 82 %, Lag= 10.7 min Primary = 0.34 cfs @ 12.15 hrs, Volume= 0.095 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Peak Elev= 423.38' @ 12.15 hrs Surf.Area= 970 sf Storage= 1,619 cf Plug -Flow detention time= 60.4 min calculated for 0.095 of (98% of inflow) Center -of -Mass det. time= 49.9 min ( 828.5 - 778.6 ) Volume Invert Avail.S_torage Storage Des&ption #1 421.20' 12 cf Custom Stage Data (Prismatic) Listed below (Recalc) 5,820 cf Overall - 2,789 cf Embedded = 3,031 cf x 0.4% Voids #2 421.20' 2,789 cf ADS _StormTech MC -4500 +Cap @ 100.00'L Inside #1 Effective Size= 90.4 "W x 60.0 "H => 26.46 sf x 100.001 = 2,645.7 cf Overall Size= 100.0 "W x 60.0 "H x 4.331 with 0.31' Overlap Cap Storaqe= +35.7 cf x 2 x 2 rows = 142.8 cf 2,801 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq -ft) (cubic -feet) (cubic -feet 421.20 970 0 0 427.20 970 5,820 5,820 Device Routing Invert Outlet Devices #1 Primary 421.20' 15.0" Round Culvert L= 50.0' Ke= 0.500 Inlet/ Outlet Invert= 421.20'/ 420.70' S=0.0100'/' Cc= 0.900 n= 0.013, Flow Area= 1.23 sf #2 Device 1 426.20' Custom Weir /Orifice, Cv= 2.62 (C= 3.28) Head (feet) 326.20 326.70 326.70 327.20 Width (feet) 1.00 1.00 4.00 4.00 #3 Device 1 421.20' 3.0" Vert. Orifice /Grate C= 0.600 #4 Device 1 423.80' 8.0" Vert. Orifice /Grate C= 0.600 Primary OutFlow Max =0.34 cfs @ 12.15 hrs HW= 423.38' (Free Discharge) t--1 =Culvert (Passes 0.34 cfs of 7.21 cfs potential flow) 2=Custom Weir /Orifice ( Controls 0.00 cfs) 3= Orifice /Grate (Orifice Controls 0.34 cfs @ 6.90 fps) = Orifice /Grate ( Controls 0.00 cfs) Post -West Type 11 24 -hr 1 -Year Rainfall= 3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCADO 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page 12 Pond 6P: ADS StormTech Hydrograph 2 V O f LL a 0 1 2 3 4 5 6 7 6 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) 427 426 -37.5 0 w 0 4214 d w 423 422 Pond 6P: ADS StormTech Stage- Discharge 0 1 2 3 4 5 6 7 8 9 10 Discharge (cfs) ■ Inflow ■ Primary Primary Post -West Type ll 24 -hr 1 -Year Rainfall = 3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 13 427 226 425 m d C 0 424 d w 423 422 Pond 6P: ADS StormTech Stage- Area - Storage 0 500 1,000 1,500 2,000 2,500 Storage (cubic -feet) i Storage Post -West Type 11 24 -hr 1 -Year Rainfall =3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 HydraCAD& 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 14 Hydrograph for Pond 6P: ADS StormTech Time Inflow Storage Elevation Primary hours ) (cfs) (cubic -fecO feet Cfs 0.00 0.00 0 421.20 0.00 0.50 0.00 0 421.20 0.00 1.00 0.00 0 421.20 0.00 1.50 0.00 0 421.20 0.00 2.00 0.00 0 421.20 0.00 2.50 0.00 0 421.20 0.00 3.00 0.00 0 421.20 0.00 3.50 0.00 1 421.20 0.00 4.00 0.00 3 421.20 0.00 4.50 0.00 8 421.21 0.00 5.00 0.01 13 421.22 0.00 5.50 0.01 20 421.23 0.00 6.00 0.01 28 421.24 0.00 6.50 0.01 37 421.25 0.01 7.00 0.01 47 421.26 0.01 7.50 0.02 56 421.27 0.01 8.00 0.02 64 421.28 0.01 8.50 0.02 72 421.29 0.02 9.00 0.03 82 421.30 0.02 9.50 0.03 92 421.32 0.03 10.00 0.04 102 421.33 0.03 10.50 0.05 119 421.35 0.04 11.00 0.08 147 421.39 0.06 11.50 0.13 203 421.46 0.09 12.00 1.74 1,331 422.96 0.30 12.50 0.15 1,468 423.16 0.32 13.00 0.09 1,132 422.68 0.28 13.50 0.07 821 422.26 0.23 14.00 0.05 562 421.92 0.18 14.50 0.05 365 421.66 0.14 15.00 0.04 235 421.50 0.10 15.50 0.04 162 421.40 0.07 16.00 0.03 128 421.36 0.05 16.50 0.03 111 421.34 0.04 17.00 0.03 104 421.33 0.03 17.50 0.03 99 421.32 0.03 18.00 0.03 95 421.32 0.03 18.50 0.02 91 421.32 0.03 19.00 0.02 88 421.31 0.02 19.50 0.02 84 421.31 0.02 20.00 0.02 80 421.30 0.02 20.50 0.02 77 421.30 0.02 21.00 0.02 75 421.30 0.02 21.50 0.02 74 421.29 0.02 22.00 0.02 73 421.29 0.02 22.50 0.02 72 421.29 0.02 23.00 0.02 72 421.29 0.02 23.50 0.02 71 421.29 0.02 24.00 0.02 70 421.29 0.02 Post -West Type 11 24 -hr 1 -Year Rainfall= 3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 15 Elevation Primary (feet) (Cfs) 421.20 0.00 421.24 0.00 421.28 0.01 421.32 0.03 421.36 0.05 421.40 0.06 421.44 0.08 421.48 0.09 421.52 0.10 421.56 0.11 421.60 0.12 421.64 0.13 421.68 0.14 421.72 0.15 421.76 0.16 421.80 0.16 421.84 0.17 421.88 0.18 421.92 0.18 421.96 0.19 422.00 0.19 422.04 0.20 422.08 0.21 422.12 0.21 422.16 0.22 422.20 0.22 422.24 0.23 422.28 0.23 422.32 0.24 422.36 0.24 422.40 0.25 422.44 0.25 422.48 0.25 422.52 0.26 422.56 0.26 422.60 0.27 422.64 0.27 422.68 0.28 422.72 0.28 422.76 0.28 422.80 0.29 422.84 0.29 422.88 0.29 422.92 0.30 422.96 0.30 423.00 0.31 423.04 0.31 423.08 0.31 423.12 0.32 423.16 0.32 423.20 0.32 423.24 0.33 Stage- Discharge for Pond 6P: ADS StormTech Elevation Primary feet (Cfs) 423.28 0.33 423.32 0.33 423.36 0.34 423.40 0.34 423.44 0.34 423.48 0.35 423.52 0.35 423.56 0.35 423.60 0.36 423.64 0.36 423.68 0.36 423.72 0.37 423.76 0.37 423.80 0.37 423.84 0.38 423.88 0.40 423.92 0.43 423.96 0.47 424.00 0.52 424.04 0.58 424.08 0.64 424.12 0.71 424.16 0.79 424.20 0.87 424.24 0.96 424.28 1.04 424.32 1.13 424.36 1.21 424.40 1.29 424.44 1.36 424.48 1.41 424.52 1.47 424.56 1.52 424.60 1.58 424.64 1.63 424.68 1.68 424.72 1.72 424.76 1.77 424.80 1.81 424.84 1.86 424.88 1.90 424.92 1.94 424.96 1.98 425.00 2.02 425.04 2.06 425.08 2.09 425.12 2.13 425.16 2.17 425.20 2.20 425.24 2.24 425.28 2.27 425.32 2.30 Elevation Primary (feet) (Cfs) 425.36 2.34 425.40 2.37 425.44 2.40 425.48 2.43 425.52 2.46 425.56 2.49 425.60 2.52 425.64 2.55 425.68 2.58 425.72 2.61 425.76 2.64 425.80 2.67 425.84 2.70 425.88 2.73 425.92 2.75 425.96 2.78 426.00 2.81 426.04 2.83 426.08 2.86 426.12 2.89 426.16 2.91 426.20 2.94 426.24 2.99 426.28 3.06 426.32 3.15 426.36 3.25 426.40 3.36 426.44 3.47 426.48 3.60 426.52 3.73 426.56 3.87 426.60 4.01 426.64 4.16 426.68 4.32 426.72 4.51 426.76 4.79 426.80 5.13 426.84 5.51 426.88 5.93 426.92 6.38 426.96 6.86 427.00 7.37 427.04 7.90 427.08 8.46 427.12 9.04 427.16 9.64 427.20 10.26 Post -West Type 11 24 -hr 1 -Year Rainf611=3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 HvdroCAD Software Solutions LLC Page 16 Elevation Storage (feet) (cubic -feet) 421.20 0 421.24 32 421.28 64 421.32 95 421.36 127 421.40 158 421.44 190 421.48 221 421.52 253 421.56 284 421.60 316 421.64 347 421.68 378 421.72 409 421.76 440 421.80 471 421.84 502 421.88 533 421.92 564 421.96 594 422.00 625 422.04 655 422.08 686 422.12 716 422.16 747 422.20 777 422.24 807 422.28 837 422.32 867 422.36 897 422.40 927 422.44 956 422.48 986 422.52 1,015 422.56 1,045 422.60 1,074 422.64 1,103 422.68 1,132 422.72 1,161 422.76 1,190 422.80 1,218 422.84 1,247 422.88 1,276 422.92 1,304 422.96 1,332 423.00 1,360 423.04 1,388 423.08 1,416 423.12 1,444 423.16 1,471 423.20 1,498 423.24 1,526 Stage -Area- Storage for Pond 6P: ADS StormTech Elevation Storage (feet) (cubic -feet) 423.28 1,553 423.32 1,580 423.36 1,607 423.40 1,633 423.44 1,660 423.48 1,686 423.52 1,712 423.56 1,738 423.60 1,764 423.64 1,790 423.68 1,815 423.72 1,841 423.76 1,866 423.80 1,891 423.84 1,915 423.88 1,940 423.92 1,964 423.96 1,989 424.00 2,013 424.04 2,036 424.08 2,060 424.12 2,083 424.16 2,106 424.20 2,129 424.24 2,152 424.28 2,174 424.32 2,197 424.36 2,219 424.40 2,240 424.44 2,262 424.48 2,283 424.52 2,304 424.56 2,325 424.60 2,345 424.64 2,365 424.68 2,385 424.72 2,405 424.76 2,424 424.80 2,443 424.84 2,462 424.88 2,480 424.92 2,498 424.96 2,515 425.00 2,533 425.04 2,550 425.08 2,566 425.12 2,582 425.16 2,598 425.20 2,614 425.24 2,628 425.28 2,643 425.32 2,657 Elevation Storage (feet)_ (cubic -feet) 425.36 2,671 425.40 2,684 425.44 2,696 425.48 2,708 425.52 2,719 425.56 2,730 425.60 2,740 425.64 2,749 425.68 2,758 425.72 2,765 425.76 2,771 425.80 2,775 425.84 2,779 425.88 2,783 425.92 2,786 425.96 2,788 426.00 2,791 426.04 2,793 426.08 2,794 426.12 2,795 426.16 2,796 426.20 2,797 426.24 2,797 426.28 2,797 426.32 2,797 426.36 2,797 426.40 2,798 426.44 2,798 426.48 2,798 426.52 2,798 426.56 2,798 426.60 2,798 426.64 2,798 426.68 2,799 426.72 2,799 426.76 2,799 426.80 2,799 426.84 2,799 426.88 2,799 426.92 2,800 426.96 2,800 427.00 2,800 427.04 2,800 427.08 2,800 427.12 2,800 427.16 2,800 427.20 2,801 Post -West Type 11 24 -hr 1 -Year Rainfall =3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCADQ 1 0.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 17 Summary for Link 8L: (new Link) Inflow Area = 0.930 ac, 67.74% Impervious, Inflow Depth > 1.77" for 1 -Year event Inflow = 1.18 cfs @ 11.98 hrs, Volume= 0.137 of Primary = 1.18 cfs @ 11.98 hrs, Volume= 0.137 af, Atten= 0 %, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs N w V 3 O LL I 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) Link 8L: (new Link) Hydrograph ■ Inflow ■ am.ary Post -West Type 11 24 -hr 1 -Year Rainfall =3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 18 Hydrograph for Link 8L: (new Link) Time Inflow Elevation Primary (hours) tcfs) (feet) (cfs) 0.00 0.00 0.00 0.00 0.50 0.00 0.00 0.00 1.00 0.00 0.00 0.00 1.50 0.00 0.00 0.00 2.00 0.00 0.00 0.00 2.50 0.00 0.00 0.00 3.00 0.00 0.00 0.00 3.50 0.00 0.00 0.00 4.00 0.00 0.00 0.00 4.50 0.00 0.00 0.00 5.00 0.00 0.00 0.00 5.50 0.00 0.00 0.00 6.00 0.00 0.00 0.00 6.50 0.01 0.00 0.01 7.00 0.01 0.00 0.01 7.50 0.01 0.00 0.01 8.00 0.01 0.00 0.01 8.50 0.02 0.00 0.02 9.00 0.02 0.00 0.02 9.50 0.03 0.00 0.03 10.00 0.03 0.00 0.03 10.50 0.04 0.00 0.04 11.00 0.06 0.00 0.06 11.50 0.11 0.00 0.11 12.00 1.16 0.00 1.16 12.50 0.41 0.00 0.41 13.00 0.33 0.00 0.33 13.50 0.27 0.00 0.27 14.00 0.22 0.00 0.22 14.50 0.17 0.00 0.17 15.00 0.13 0.00 0.13 15.50 0.09 0.00 0.09 16.00 0.07 0.00 0.07 16.50 0.06 0.00 0.06 17.00 0.05 0.00 0.05 17.50 0.05 0.00 0.05 18.00 0.04 0.00 0.04 18.50 0.04 0.00 0.04 19.00 0.04 0.00 0.04 19.50 0.04 0.00 0.04 20.00 0.03 0.00 0.03 20.50 0.03 0.00 0.03 21.00 0.03 0.00 0.03 21.50 0.03 0.00 0.03 22.00 0.03 0.00 0.03 22.50 0.03 0.00 0.03 23.00 0.03 0.00 0.03 23.50 0.03 0.00 0.03 24.00 0.03 0.00 0.03 Post -West Type// 24 -hr 2 -Year Rainfall= 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 19 Time span =0.00 -24.00 hrs, dt =0.01 hrs, 2401 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 5S: Post - Developed Area to Runoff Area =0.470 ac 91.49% Impervious Runoff Depth >3.09" Tc =6.0 min CN =95 Runoff =2.34 cfs 0.121 of Subcatchment 7S: Post - Developed Area to Runoff Area =0.460 ac 43.48% Impervious Runoff Depth >1.55" Tc =6.0 min CN =77 Runoff =1.28 cfs 0.059 of Pond 6P: ADS StormTech Peak Elev= 424.00' Storage =2,012 cf Inflow =2.34 cfs 0.121 of Outflow =0.52 cfs 0.119 of Link 8L: (new Link) Inflow =1.61 cfs 0.179 of Primary=1.61 cfs 0.179 of Total Runoff Area= 0.930 ac Runoff Volume= 0.180 of Average Runoff Depth =2.33" 32.26% Pervious = 0.300 ac 67.74% Impervious = 0.630 ac Post -West Type// 24 -hr 2 -Year Rainfall= 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 20 Summary for Subcatchment 5S: Post - Developed Area to West Routed Runoff = 2.34 cfs @ 11.97 hrs, Volume= 0.121 af, Depth> 3.09" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 2 -Year Rainfall= 3.66" Area (ac) CN Descriotion 0.430 98 Paved parking, HSG B 0.040 61 >75% Grass cover, Good, HSG B 0.470 95 Weighted Average 0.040 8.51 % Pervious Area 0.430 91.49% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 5S: Post - Developed Area to West Routed Hydrograph ■ Runoff Type II 24 -hr 2 2 -Year Rainfall= 3.66" Runoff Area =0.470 ac Runoff Volume 0.121 of Runoff Depth >3.09" 0 LL Tc =6.0 min 11 I U CN =95 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) Post -West Type// 24 -hr 2 -Year Rainfall = 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 21 Hydrograph for Subcatchment 5S: Post - Developed Area to West Routed Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.04 0.00 0.00 1.50 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.50 0.10 0.00 0.00 3.00 0.13 0.00 0.00 3.50 0.15 0.00 0.00 4.00 0.18 0.01 0.01 4.50 0.20 0.02 0.01 5.00 0.23 0.02 0.01 5.50 0.26 0.04 0.01 6.00 0.29 0.05 0.01 6.50 0.33 0.07 0.02 7.00 0.36 0.08 0.02 7.50 0.40 0.11 0.02 8.00 0.44 0.13 0.02 8.50 0.48 0.16 0.03 9.00 0.54 0.20 0.04 9.50 0.60 0.24 0.04 10.00 0.66 0.29 0.05 10.50 0.75 0.35 0.07 11.00 0.86 0.44 0.10 11.50 1.04 0.59 0.17 12.00 2.43 1.89 2.14 12.50 2.69 2.15 0.18 13.00 2.83 2.28 0.11 13.50 2.92 2.38 0.08 14.00 3.00 2.45 0.07 14.50 3.07 2.51 0.06 15.00 3.12 2.57 0.05 15.50 3.18 2.62 0.05 16.00 3.22 2.67 0.04 16.50 3.26 2.71 0.04 17.00 3.30 2.74 0.04 17.50 3.34 2.78 0.03 18.00 3.37 2.81 0.03 18.50 3.40 2.84 0.03 19.00 3.43 2.87 0.03 19.50 3.46 2.90 0.02 20.00 3.48 2.92 0.02 20.50 3.51 2.95 0.02 21.00 3.53 2.97 0.02 21.50 3.55 2.99 0.02 22.00 3.58 3.01 0.02 22.50 3.60 3.03 0.02 23.00 3.62 3.06 0.02 23.50 3.64 3.08 0.02 24.00 3.66 3.10 0.02 Post -West Type 11 24 -hr 2 -Year Rainfall = 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page 22 Summary for Subcatchment 7S: Post - Developed Area to West Runoff = 1.28 cfs @ 11.98 hrs, Volume= 0.059 af, Depth> 1.55" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 2 -Year Rainfall= 3.66" Area (ac) CN Description 0.200 98 Paved parking, HSG B 0.260 61 >75% Grass cover, Good, HSG B 0.460 77 Weighted Average 0.260 56.52% Pervious Area 0.200 43.48% Impervious Area Tc Length Slope Velocity Capacity Description (min) feet ft/ft ft/sec cfs 6.0 Direct Entry, N 0 LL 1 Subcatchment 7S: Post - Developed Area to West Hydrograph Type II 24 -hr 2 -Year Rainfall= 3.66" Runoff Area =0.460 ac Runoff Volume =0.059 of Runoff Depth >1.55" Tc =6.0 min CN =77 a 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 -West Type// 24 -hr 2 -Year Rainfall =3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 HvdroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Paw 23 Hydrograph for Subcatchment 7S: Post - Developed Area to West Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.04 0.00 0.00 1.50 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.50 0.10 0.00 0.00 3.00 0.13 0.00 0.00 3.50 0.15 0.00 0.00 4.00 0.18 0.00 0.00 4.50 0.20 0.00 0.00 5.00 0.23 0.00 0.00 5.50 0.26 0.00 0.00 6.00 0.29 0.00 0.00 6.50 0.33 0.00 0.00 7.00 0.36 0.00 0.00 7.50 0.40 0.00 0.00 8.00 0.44 0.00 0.00 8.50 0.48 0.00 0.00 9.00 0.54 0.00 0.00 9.50 0.60 0.00 0.00 10.00 0.66 0.00 0.00 10.50 0.75 0.01 0.01 11.00 0.86 0.02 0.02 11.50 1.04 0.06 0.04 12.00 2.43 0.69 1.21 12.50 2.69 0.86 0.12 13.00 2.83 0.95 0.07 13.50 2.92 1.02 0.06 14.00 3.00 1.07 0.05 14.50 3.07 1.12 0.04 15.00 3.12 1.16 0.04 15.50 3.18 1.19 0.03 16.00 3.22 1.23 0.03 16.50 3.26 1.26 0.03 17.00 3.30 1.28 0.03 17.50 3.34 1.31 0.02 18.00 3.37 1.34 0.02 18.50 3.40 1.36 0.02 19.00 3.43 1.38 0.02 19.50 3.46 1.40 0.02 20.00 3.48 1.42 0.02 20.50 3.51 1.44 0.02 21.00 3.53 1.45 0.02 21.50 3.55 1.47 0.02 22.00 3.58 1.49 0.02 22.50 3.60 1.50 0.02 23.00 3.62 1.52 0.01 23.50 3.64 1.54 0.01 24.00 3.66 1.55 0.01 Post -West Type// 24 -hr 2 -Year Rainfall =3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 24 Summary for Pond 6P: ADS StormTech Inflow Area = 0.470 ac, 91.49% Impervious, Inflow Depth > 3.09" for 2 -Year event Inflow = 2.34 cfs @ 11.97 hrs, Volume= 0.121 of Outflow = 0.52 cfs @ 12.12 hrs, Volume= 0.119 af, Atten= 78 %, Lag= 9.1 min Primary = 0.52 cfs @ 12.12 hrs, Volume= 0.119 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Peak Elev= 424.00' @ 12.12 hrs Surf.Area= 970 sf Storage= 2,012 cf Plug -Flow detention time= 61.8 min calculated for 0.119 of (98% of inflow) Center -of -Mass det. time= 52.4 min ( 825.1 - 772.7 ) Volume Invert Avail.Storage Storage Description _ #1 421.20' 12 cf Custom Stage Data (Prismatic) Listed below (Recalc) 5,820 cf Overall - 2,789 cf Embedded = 3,031 cf x 0.4% Voids #2 421.20' 2,789 cf ADS _StormTech MC -4500 +Cap @ 100.00'L Inside #1 Effective Size= 90.4 "W x 60.0 "H => 26.46 sf x 100.001= 2,645.7 cf Overall Size= 100.0 "W x 60.0 "H x 4.33'L with 0.31' Overlap Cap Storage= +35.7 cf x 2 x 2 rows = 142.8 cf 2,801 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq -ft) (cubic -feet) (cubic -feet) 421.20 970 0 0 427.20 970 5,820 5,820 Device Routing Invert Outlet Devices #1 Primary 421.20' 15.0" Round Culvert L= 50.0' Ke= 0.500 Inlet/ Outlet Invert= 421.20'/ 420.70' S=0.0100'/' Cc= 0.900 n= 0.013, Flow Area= 1.23 sf #2 Device 1 426.20' Custom Weir /Orifice, Cv= 2.62 (C= 3.28) Head (feet) 326.20 326.70 326.70 327.20 Width (feet) 1.00 1.00 4.00 4.00 #3 Device 1 421.20' 3.0" Vert. Orifice /Grate C= 0.600 #4 Device 1 423.80' 8.0" Vert. Orifice /Grate C= 0.600 Primary OutFlow Max =0.52 cfs @ 12.12 hrs HW= 424.00' (Free Discharge) 'L1 = Culvert (Passes 0.52 cfs of 8.63 cfs potential flow) 2= Custom Weir /Orifice ( Controls 0.00 cfs) 3= Orifice /Grate (Orifice Controls 0.39 cfs @ 7.87 fps) 4= Orifice /Grate (Orifice Controls 0.13 cfs @ 1.52 fps) Post -West Type// 24 -hr 2 -Year Rainfall = 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD@ 10.00 s/n 05538 @2013 HydroCAD Software Solutions LLC Pacle 25 Pond 6P: ADS StormTech Hydrograph 2 3 0 LL 0 t 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) 427 426 42 d d w c 0 424 d W 423 422 Pond 6P: ADS StormTech Stage- Discharge 0 1 2 3 4 5 6 7 8 9 10 Discharge (cfs) ■ Inflow 0 Primary Primary Post -West Type// 24 -hr 2 -Year Rainfall = 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 HvdroCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 26 427 428 425 m w c 0 424 d W 423 422 Pond 6P: ADS StormTech Stage -Area- Storage 0 500 1,000 1,500 2,000 2,500 Storage (cubic -feet) ll sllr, , Post -West Type// 24 -hr 2 -Year Rainfall = 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 27 Hydrograph for Pond 6P: ADS StormTech Time Inflow Storage Elevation Primary hours ) (Cfs) (cubic -feet feet Cfs 0.00 0.00 0 421.20 0.00 0.50 0.00 0 421.20 0.00 1.00 0.00 0 421.20 0.00 1.50 0.00 0 421.20 0.00 2.00 0.00 0 421.20 0.00 2.50 0.00 0 421.20 0.00 3.00 0.00 1 421.20 0.00 3.50 0.00 4 421.21 0.00 4.00 0.01 10 421.21 0.00 4.50 0.01 17 421.22 0.00 5.00 0.01 26 421.23 0.00 5.50 0.01 35 421.24 0.01 6.00 0.01 47 421.26 0.01 6.50 0.02 57 421.27 0.01 7.00 0.02 66 421.28 0.01 7.50 0.02 73 421.29 0.02 8.00 0.02 79 421.30 0.02 8.50 0.03 87 421.31 0.02 9.00 0.04 100 421.33 0.03 9.50 0.04 110 421.34 0.04 10.00 0.05 121 421.35 0.04 10.50 0.07 142 421.38 0.05 11.00 0.10 176 421.42 0.07 11.50 0.17 251 421.52 0.10 12.00 2.14 1,674 423.46 0.35 12.50 0.18 1,822 423.69 0.36 13.00 0.11 1,453 423.13 0.32 13.50 0.08 1,097 422.63 0.27 14.00 0.07 787 422.21 0.22 14.50 0.06 538 421.89 0.18 15.00 0.05 356 421.65 0.14 15.50 0.05 235 421.50 0.10 16.00 0.04 165 421.41 0.07 16.50 0.04 132 421.37 0.05 17.00 0.04 118 421.35 0.04 17.50 0.03 111 421.34 0.04 18.00 0.03 106 421.33 0.03 18.50 0.03 102 421.33 0.03 19.00 0.03 98 421.32 0.03 19.50 0.02 94 421.32 0.03 20.00 0.02 90 421.31 0.02 20.50 0.02 86 421.31 0.02 21.00 0.02 84 421.31 0.02 21.50 0.02 83 421.30 0.02 22.00 0.02 81 421.30 0.02 22.50 0.02 80 421.30 0.02 23.00 0.02 79 421.30 0.02 23.50 0.02 79 421.30 0.02 24.00 0.02 78 421.30 0.02 Post -West Type// 24 -hr 2 -Year Rainfall= 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 HvdroCAD® 10.00 s/n 06538 02013 HvdroCAD Software Solutions LLC Page 2$ Stage- Discharge for Pond 6P: ADS StormTech Elevation Primary (feet) (cfs) 421.20 0.00 421.24 0.00 421.28 0.01 421.32 0.03 421.36 0.05 421.40 0.06 421.44 0.08 421.48 0.09 421.52 0.10 421.56 0.11 421.60 0.12 421.64 0.13 421.68 0.14 421.72 0.15 421.76 0.16 421.80 0.16 421.84 0.17 421.88 0.18 421.92 0.18 421.96 0.19 422.00 0.19 422.04 0.20 422.08 0.21 422.12 0.21 422.16 0.22 422.20 0.22 422.24 0.23 422.28 0.23 422.32 0.24 422.36 0.24 422.40 0.25 422.44 0.25 422.48 0.25 422.52 0.26 422.56 0.26 422.60 0.27 422.64 0.27 422.68 0.28 422.72 0.28 422.76 0.28 422.80 0.29 422.84 0.29 422.88 0.29 422.92 0.30 422.96 0.30 423.00 0.31 423.04 0.31 423.08 0.31 423.12 0.32 423.16 0.32 423.20 0.32 423.24 0.33 Elevation Primary (feet) (cfs) 423.28 0.33 423.32 0.33 423.36 0.34 423.40 0.34 423.44 0.34 423.48 0.35 423.52 0.35 423.56 0.35 423.60 0.36 423.64 0.36 423.68 0.36 423.72 0.37 423.76 0.37 423.80 0.37 423.84 0.38 423.88 0.40 423.92 0.43 423.96 0.47 424.00 0.52 424.04 0.58 424.08 0.64 424.12 0.71 424.16 0.79 424.20 0.87 424.24 0.96 424.28 1.04 424.32 1.13 424.36 1.21 424.40 1.29 424.44 1.36 424.48 1.41 424.52 1.47 424.56 1.52 424.60 1.58 424.64 1.63 424.68 1.68 424.72 1.72 424.76 1.77 424.80 1.81 424.84 1.86 424.88 1.90 424.92 1.94 424.96 1.98 425.00 2.02 425.04 2.06 425.08 2.09 425.12 2.13 425.16 2.17 425.20 2.20 425.24 2.24 425.28 2.27 425.32 2.30 Elevation Primary (feet) (cfs) 425.36 2.34 425.40 2.37 425.44 2.40 425.48 2.43 425.52 2.46 425.56 2.49 425.60 2.52 425.64 2.55 425.68 2.58 425.72 2.61 425.76 2.64 425.80 2.67 425.84 2.70 425.88 2.73 425.92 2.75 425.96 2.78 426.00 2.81 426.04 2.83 426.08 2.86 426.12 2.89 426.16 2.91 426.20 2.94 426.24 2.99 426.28 3.06 426.32 3.15 426.36 3.25 426.40 3.36 426.44 3.47 426.48 3.60 426.52 3.73 426.56 3.87 426.60 4.01 426.64 4.16 426.68 4.32 426.72 4.51 426.76 4.79 426.80 5.13 426.84 5.51 426.88 5.93 426.92 6.38 426.96 6.86 427.00 7.37 427.04 7.90 427.08 8.46 427.12 9.04 427.16 9.64 427.20 10.26 Post -West Type// 24 -hr 2 -Year Rainfall = 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 29 Elevation Storage feet cubic -feet 421.20 0 421.24 32 421.28 64 421.32 95 421.36 127 421.40 158 421.44 190 421.48 221 421.52 253 421.56 284 421.60 316 421.64 347 421.68 378 421.72 409 421.76 440 421.80 471 421.84 502 421.88 533 421.92 564 421.96 594 422.00 625 422.04 655 422.08 686 422.12 716 422.16 747 422.20 777 422.24 807 422.28 837 422.32 867 422.36 897 422.40 927 422.44 956 422.48 986 422.52 1,015 422.56 1,045 422.60 1,074 422.64 1,103 422.68 1,132 422.72 1,161 422.76 1,190 422.80 1,218 422.84 1,247 422.88 1,276 422.92 1,304 422.96 1,332 423.00 1,360 423.04 1,388 423.08 1,416 423.12 1,444 423.16 1,47,1 423.20 1,498 423.24 1,526 Stage -Area- Storage for Pond 6P: ADS StormTech Elevation Storage (feet) (cubic -feet) 423.28 1,553 423.32 1,580 423.36 1,607 423.40 1,633 423.44 1,660 423.48 1,686 423.52 1,712 423.56 1,738 423.60 1,764 423.64 1,790 423.68 1,815 423.72 1,841 423.76 1,866 423.80 1,891 423.84 1,915 423.88 1,940 423.92 1,964 423.96 1,989 424.00 2,013 424.04 2,036 424.08 2,060 424.12 2,083 424.16 2,106 424.20 2,129 424.24 2,152 424.28 2,174 424.32 2,197 424.36 2,219 424.40 2,240 424.44 2,262 424.48 2,283 424.52 2,304 424.56 2,325 424.60 2,345 424.64 2,365 424.68 2,385 424.72 2,405 424.76 2,424 424.80 2,443 424.84 2,462 424.88 2,480 424.92 2,498 424.96 2,515 425.00 2,533 425.04 2,550 425.08 2,566 425.12 2,582 425.16 2,598 425.20 2,614 425.24 2,628 425.28 2,643 425.32 2,657 Elevation Storage (feet) (cubic -feet) 425.36 2,671 425.40 2,684 425.44 2,696 425.48 2,708 425.52 2,719 425.56 2,730 425.60 2,740 425.64 2,749 425.68 2,758 425.72 2,765 425.76 2,771 425.80 2,775 425.84 2,779 425.88 2,783 425.92 2,786 425.96 2,788 426.00 2,791 426.04 2,793 426.08 2,794 426.12 2,795 426.16 2,796 426.20 2,797 426.24 2,797 426.28 2,797 426.32 2,797 426.36 2,797 426.40 2,798 426.44 2,798 426.48 2,798 426.52 2,798 426.56 2,798 426.60 2,798 426.64 2,798 426.68 2,799 426.72 2,799 426.76 2,799 426.80 2,799 426.84 2,799 426.88 2,799 426.92 2,800 426.96 2,800 427.00 2,800 427.04 2,800 427.08 2,800 427.12 2,800 427.16 2,800 427.20 2,801 Post -West Type// 24 -hr 2 -Year Rainfall = 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 30 Summary for Link 8L: (new Link) Inflow Area = 0.930 ac, 67.74% Impervious, Inflow Depth > 2.31" for 2 -Year event Inflow = 1.61 cfs @ 11.98 hrs, Volume= 0.179 of Primary = 1.61 cfs @ 11.98 hrs, Volume= 0.179 af, Atten= 0 %, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs v 3 0 U_ 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) Link 8L: (new Link) Hydrograph ■ Inflow ■ Primary Post -West Type// 24 -hr 2 -Year Rainfall = 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 31 Hydrograph for Link 8L: (new Link) Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 0.50 0.00 0.00 0.00 1.00 0.00 0.00 0.00 1.50 0.00 0.00 0.00 2.00 0.00 0.00 0.00 2.50 0.00 0.00 0.00 3.00 0.00 0.00 0.00 3.50 0.00 0.00 0.00 4.00 0.00 0.00 0.00 4.50 0.00 0.00 0.00 5.00 0.00 0.00 0.00 5.50 0.01 0.00 0.01 6.00 0.01 0.00 0.01 6.50 0.01 0.00 0.01 7.00 0.01 0.00 0.01 7.50 0.02 0.00 0.02 8.00 0.02 0.00 0.02 8.50 0.02 0.00 0.02 9.00 0.03 0.00 0.03 9.50 0.04 0.00 0.04 10.00 0.04 0.00 0.04 10.50 0.06 0.00 0.06 11.00 0.09 0.00 0.09 11.50 0.15 0.00 0.15 12.00 1.56 0.00 1.56 12.50 0.48 0.00 0.48 13.00 0.39 0.00 0.39 13.50 0.33 0.00 0.33 14.00 0.27 0.00 0.27 14.50 0.22 0.00 0.22 15.00 0.17 0.00 0.17 15.50 0.13 0.00 0.13 16.00 0.10 0.00 0.10 16.50 0.08 0.00 0.08 17.00 0.07 0.00 0.07 17.50 0.06 0.00 0.06 18.00 0.06 0.00 0.06 18.50 0.05 0.00 0.05 19.00 0.05 0.00 0.05 19.50 0.05 0.00 0.05 20.00 0.04 0.00 0.04 20.50 0.04 0.00 0.04 21.00 0.04 0.00 0.04 21.50 0.04 0.00 0.04 22.00 0.04 0.00 0.04 22.50 0.04 0.00 0.04 23.00 0.03 0.00 0.03 23.50 0.03 0.00 0.03 24.00 0.03 0.00 0.03 Post -West Type 11 24 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 32 Time span =0.00 -24.00 hrs, dt =0.01 hrs, 2401 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 5S: Post - Developed Area to Runoff Area =0.470 ac 91.49% Impervious Runoff Depth >4.94" Tc =6.0 min CN =95 Runoff =3.63 cfs 0.193 of Subcatchment 7S: Post - Developed Area to Runoff Area =0.460 ac 43.48% Impervious Runoff Depth >3.07" Tc =6.0 min CN =77 Runoff =2.51 cfs 0.118 of Pond 6P: ADS StormTech Peak Elev= 425.19' Storage =2,610 cf Inflow =3.63 cfs 0.193 of Outflow =2.19 cfs 0.191 of Link 8L: (new Link) Inflow =4.30 cfs 0.309 of Primary=4.30 cfs 0.309 of Total Runoff Area = 0.930 ac Runoff Volume = 0.311 of Average Runoff Depth = 4.01" 32.26% Pervious = 0.300 ac 67.74% Impervious = 0.630 ac Post -West Type 11 24 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s!n 36538 © 2013 HydroCAD Software Solutions LLC .Page 33 Summary for Subcatchment 5S: Post - Developed Area to West Routed Runoff = 3.63 cfs @ 11.97 hrs, Volume= 0.193 af, Depth> 4.94" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 10 -Year Rainfall= 5.53" Area (ac) CN Descriotion 0.430 98 Paved parking, HSG B 0.040 61 >75% Grass cover, Good, HSG B 0.470 95 Weighted Average 0.040 8.51 % Pervious Area 0.430 91.49% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, 4 3 32 O LL Subcatchment 5S: Post - Developed Area to West Routed Hydrograph Type II 24 -hr 10 -Year Rainfall= 5.53" Runoff Area =0.470 ac Runoff Volume =0.193 of Runoff Depth >4.94" Tc =6.0 min CN =95 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 -West Type 11 24 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 34 Hydrograph for Subcatchment 5S: Post - Developed Area to West Routed Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.50 0.03 0.00 0.00 1.00 0.06 0.00 0.00 1.50 0.09 0.00 0.00 2.00 0.12 0.00 0.00 2.50 0.16 0.00 0.00 3.00 0.19 0.01 0.01 3.50 0.23 0.02 0.01 4.00 0.27 0.04 0.01 4.50 0.31 0.06 0.02 5.00 0.35 0.08 0.02 5.50 0.39 0.10 0.03 6.00 0.44 0.13 0.03 6.50 0.49 0.16 0.03 7.00 0.55 0.20 0.04 7.50 0.60 0.24 0.04 8.00 0.66 0.29 0.04 8.50 0.73 0.34 0.05 9.00 0.81 0.41 0.07 9.50 0.90 0.48 0.07 10.00 1.00 0.56 0.09 10.50 1.13 0.68 0.11 11.00 1.30 0.83 0.16 11.50 1.56 1.07 0.27 12.00 3.67 3.10 3.31 12.50 4.06 3.49 0.28 13.00 4.27 3.70 0.17 13.50 4.42 3.84 0.13 14.00 4.53 3.96 0.10 14.50 4.63 4.06 0.09 15.00 4.72 4.14 0.08 15.50 4.80 4.22 0.07 16.00 4.87 4.29 0.06 16.50 4.93 4.35 0.06 17.00 4.99 4.41 0.05 17.50 5.04 4.46 0.05 18.00 5.09 4.51 0.05 18.50 5.14 4.56 0.04 19.00 5.19 4.60 0.04 19.50 5.23 4.64 0.04 20.00 5.26 4.68 0.03 20.50 5.30 4.72 0.03 21.00 5.34 4.75 0.03 21.50 5.37 4.79 0.03 22.00 5.40 4.82 0.03 22.50 5.44 4.85 0.03 23.00 5.47 4.88 0.03 23.50 5.50 4.91 0.03 24.00 5.53 4.94 0.03 Post -West Type 11 24 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD0 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 35 Summary for Subcatchment 7S: Post - Developed Area to West Runoff = 2.51 cfs @ 11.97 hrs, Volume= 0.118 af, Depth> 3.07" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 10 -Year Rainfall= 5.53" Area (ac) CN Description 0.200 98 Paved parking, HSG B 0.260 61 >75% Grass cover, Good, HSG B 0.460 77 Weighted Average 0.260 56.52% Pervious Area 0.200 43.48% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, N 3 0 LL 2 i. Subcatchment 7S: Post - Developed Area to West Hydrograph Type II 24 -hr 10 -Year Rainfall = 5.53" Runoff Area =0.460 ac Runoff Volume-0.118 of Runoff Depth >3.07" Tc =6.0 min CN =77 10 11 12 13 14 15 16 17 18 19 20 21 22 23 2 Time (hours) i d RunaFf Post -West Type // 24 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 36 Hydrograph for Subcatchment 7S: Post - Developed Area to West Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.50 0.03 0.00 0.00 1.00 0.06 0.00 0.00 1.50 0.09 0.00 0.00 2.00 0.12 0.00 0.00 2.50 0.16 0.00 0.00 3.00 0.19 0.00 0.00 3.50 0.23 0.00 0.00 4.00 0.27 0.00 0.00 4.50 0.31 0.00 0.00 5.00 0.35 0.00 0.00 5.50 0.39 0.00 0.00 6.00 0.44 0.00 0.00 6.50 0.49 0.00 0.00 7.00 0.55 0.00 0.00 7.50 0.60 0.00 0.00 8.00 0.66 0.00 0.00 8.50 0.73 0.01 0.01 9.00 0.81 0.01 0.01 9.50 0.90 0.03 0.01 10.00 1.00 0.05 0.02 10.50 1.13 0.08 0.03 11.00 1.30 0.13 0.06 11.50 1.56 0.24 0.12 12.00 3.67 1.56 2.34 12.50 4.06 1.86 0.22 13.00 4.27 2.02 0.13 13.50 4.42 2.14 0.10 14.00 4.53 2.24 0.08 14.50 4.63 2.32 0.07 15.00 4.72 2.39 0.06 15.50 4.80 2.45 0.06 16.00 4.87 2.51 0.05 16.50 4.93 2.56 0.05 17.00 4.99 2.61 0.04 17.50 5.04 2.66 0.04 18.00 5.09 2.70 0.04 18.50 5.14 2.74 0.04 19.00 5.19 2.78 0.03 19.50 5.23 2.81 0.03 20.00 5.26 2.85 0.03 20.50 5.30 2.88 0.03 21.00 5.34 2.91 0.03 21.50 5.37 2.93 0.03 22.00 5.40 2.96 0.03 22.50 5.44 2.99 0.03 23.00 5.47 3.02 0.03 23.50 5.50 3.05 0.02 24.00 5.53 3.07 0.02 Post -West Type 11 24 -hr 10 -Year Rainfall= 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 37 Summary for Pond 6P: ADS StormTech Inflow Area = 0.470 ac, 91.49% Impervious, Inflow Depth > 4.94" for 10 -Year event Inflow = 3.63 cfs @ 11.97 hrs, Volume= 0.193 of Outflow = 2.19 cfs @ 12.04 hrs, Volume= 0.191 af, Atten= 40 %, Lag= 4.6 min Primary = 2.19 cfs @ 12.04 hrs, Volume= 0.191 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Peak Elev= 425.19'@ 12.04 hrs Surf.Area= 970 sf Storage= 2,610 cf Plug -Flow detention time= 51.1 min calculated for 0.191 of (99% of inflow) Center -of -Mass det. time= 43.5 min ( 804.7 - 761.2 ) Volume Invert Avail.Stora a Storage Descri tion #1 421.20' 12 cf Custom Stage Data (Prismatic) Listed below (Recalc) 5,820 cf Overall - 2,789 cf Embedded = 3,031 cf x 0.4% Voids #2 421.20' 2,789 cf ADS _StormTech MC -4500 +Cap @ 100.00'L Inside #1 Effective Size= 90.4 "W x 60.0 "H => 26.46 sf x 100.00'L = 2,645.7 cf Overall Size= 100.0 "W x 60.0 "H x 4.331 with 0.31' Overlap Cap Storage= +35.7 cf x 2 x 2 rows = 142.8 cf 2,801 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq -ft) (cubic -feet) (cubic -feet) 421.20 970 0 0 427.20 970 5,820 5,820 Device Routing Invert Outlet Devices #1 Primary 421.20' 15.0" Round Culvert L= 50.0' Ke= 0.500 Inlet/ Outlet Invert= 421.20'/ 420.70' S=0.0100'/' Cc= 0.900 n= 0.013, Flow Area= 1.23 sf #2 Device 1 426.20' Custom Weir /Orifice, Cv= 2.62 (C= 3.28) Head (feet) 326.20 326.70 326.70 327.20 Width (feet) 1.00 1.00 4.00 4.00 #3 Device 1 421.20' 3.0" Vert. Orifice /Grate C= 0.600 #4 Device 1 423.80' 8.0" Vert. Orifice /Grate C= 0.600 Primary OutFlow Max =2.19 cfs @ 12.04 hrs HW= 425.19' (Free Discharge) 't-1 =Culvert (Passes 2.19 cfs of 10.84 cfs potential flow) 2= Custom Weir /Orifice ( Controls 0.00 cfs) 3= Orifice /Grate (Orifice Controls 0.46 cfs @ 9.46 fps) 4= Orifice /Grate (Orifice Controls 1.73 cfs @ 4.95 fps) Post -West Type 1124 -hr 10 -Year Rainfall= 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 38 Pond 6P: ADS StormTech Hydrograph 5 0 3 0 LL n 0 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) 427 426 425 d a� w c 0 d W 423 422 Pond 6P: ADS StormTech Stage- Discharge 0 1 2 3 4 5 6 7 8 9 10 Discharge (cfs) ■ Inflow ■ Primary p Primary Post -West Type 11 24 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 HvdroCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 39 427 426 425 d w m c 0 g 424 m W 123 122 Pond 6P: ADS StormTech Stage -Area- Storage D 500 x,000 1,500 2,000 2,500 Storage (cubic -feet) CI S�orzge Post -West Type 11 24 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 40 Hydrograph for Pond 6P: ADS StorrnTech Time Inflow Storage Elevation Primary (hours) {cfs ) (cubic -feet (feet) Cfs 0.00 0.00 0 421.20 0.00 0.50 0.00 0 421.20 0.00 1.00 0.00 0 421.20 0.00 1.50 0.00 0 421.20 0.00 2.00 0.00 0 421.20 0.00 2.50 0.00 5 421.21 0.00 3.00 0.01 14 421.22 0.00 3.50 0.01 26 421.23 0.00 4.00 0.01 40 421.25 0.01 4.50 0.02 55 421.27 0.01 5.00 0.02 68 421.29 0.02 5.50 0.03 79 421.30 0.02 6.00 0.03 88 421.31 0.02 6.50 0.03 96 421.32 0.03 7.00 0.04 104 421.33 0.03 7.50 0.04 111 421.34 0.04 8.00 0.04 117 421.35 0.04 8.50 0.05 127 421.36 0.05 9.00 0.07 144 421.38 0.06 9.50 0.07 160 421.40 0.06 10.00 0.09 176 421.42 0.07 10.50 0.11 211 421.47 0.09 11.00 0.16 278 421.55 0.11 11.50 0.27 422 421.74 0.15 12.00 3.31 2,506 424.94 1.96 12.50 0.28 1,944 423.89 0.41 13.00 0.17 1,664 423.45 0.34 13.50 0.13 1,345 422.98 0.30 14.00 0.10 1,041 422.55 0.26 14.50 0.09 775 422.20 0.22 15.00 0.08 564 421.92 0.18 15.50 0.07 403 421.71 0.15 16.00 0.06 286 421.56 0.12 16.50 0.06 210 421.47 0.09 17.00 0.05 169 421.41 0.07 17.50 0.05 149 421.39 0.06 18.00 0.05 138 421.37 0.05 18.50 0.04 131 421.37 0.05 19.00 0.04 125 421.36 0.04 19.50 0.04 119 421.35 0.04 20.00 0.03 113 421.34 0.04 20.50 0.03 109 421.34 0.04 21.00 0.03 106 421.33 0.03 21.50 0.03 105 421.33 0.03 22.00 0.03 103 421.33 0.03 22.50 0.03 102 421.33 0.03 23.00 0.03 101 421.33 0.03 23.50 0.03 100 421.33 0.03 24.00 0.03 99 421.32 0.03 Post -West Type 1124 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 IHydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 41 Elevation Primary (feet) (Cfs) 421.20 0.00 421.24 0.00 421.28 0.01 421.32 0.03 421.36 0.05 421.40 0.06 421.44 0.08 421.48 0.09 421.52 0.10 421.56 0.11 421.60 0.12 421.64 0.13 421.68 0.14 421.72 0.15 421.76 0.16 421.80 0.16 421.84 0.17 421.88 0.18 421.92 0.18 421.96 0.19 422.00 0.19 422.04 0.20 422.08 0.21 422.12 0.21 422.16 0.22 422.20 0.22 422.24 0.23 422.28 0.23 422.32 0.24 422.36 0.24 422.40 0.25 422.44 0.25 422.48 0.25 422.52 0.26 422.56 0.26 422.60 0.27 422.64 0.27 422.68 0.28 422.72 0.28 422.76 0.28 422.80 0.29 422.84 0.29 422.88 0.29 422.92 0.30 422.96 0.30 423.00 0.31 423.04 0.31 423.08 0.31 423.12 0.32 423.16 0.32 423.20 0.32 423.24 0.33 Stage- Discharge for Pond 6P: ADS StormTech Elevation Primary (feet) (Cfsj 423.28 0.33 423.32 0.33 423.36 0.34 423.40 0.34 423.44 0.34 423.48 0.35 423.52 0.35 423.56 0.35 423.60 0.36 423.64 0.36 423.68 0.36 423.72 0.37 423.76 0.37 423.80 0.37 423.84 0.38 423.88 0.40 423.92 0.43 423.96 0.47 424.00 0.52 424.04 0.58 424.08 0.64 424.12 0.71 424.16 0.79 424.20 0.87 424.24 0.96 424.28 1.04 424.32 1.13 424.36 1.21 424.40 1.29 424.44 1.36 424.48 1.41 424.52 1.47 424.56 1.52 424.60 1.58 424.64 1.63 424.68 1.68 424.72 1.72 424.76 1.77 424.80 1.81 424.84 1.86 424.88 1.90 424.92 1.94 424.96 1.98 425.00 2.02 425.04 2.06 425.08 2.09 425.12 2.13 425.16 2.17 425.20 2.20 425.24 2.24 425.28 2.27 425.32 2.30 Elevation Primary (feet) (Cfs) 425.36 2.34 425.40 2.37 425.44 2.40 425.48 2.43 425.52 2.46 425.56 2.49 425.60 2.52 425.64 2.55 425.68 2.58 425.72 2.61 425.76 2.64 425.80 2.67 425.84 2.70 425.88 2.73 425.92 2.75 425.96 2.78 426.00 2.81 426.04 2.83 426.08 2.86 426.12 2.89 426.16 2.91 426.20 2.94 426.24 2.99 426.28 3.06 426.32 3.15 426.36 3.25 426.40 3.36 426.44 3.47 426.48 3.60 426.52 3.73 426.56 3.87 426.60 4.01 426.64 4.16 426.68 4.32 426.72 4.51 426.76 4.79 426.80 5.13 426.84 5.51 426.88 5.93 426.92 6.38 426.96 6.86 427.00 7.37 427.04 7.90 427.08 8.46 427.12 9.04 427.16 9.64 427.20 10.26 Post -West Type 11 24 -hr 10 -Year Rainfall= 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 42 Stage -Area- Storage for Pond 6P: ADS StormTech Elevation Storage (feet) (cubic -feet) 421.20 0 421.24 32 421.28 64 421.32 95 421.36 127 421.40 158 421.44 190 421.48 221 421.52 253 421.56 284 421.60 316 421.64 347 421.68 378 421.72 409 421.76 440 421.80 471 421.84 502 421.88 533 421.92 564 421.96 594 422.00 625 422.04 655 422.08 686 422.12 716 422.16 747 422.20 777 422.24 807 422.28 837 422.32 867 422.36 897 422.40 927 422.44 956 422.48 986 422.52 1,015 422.56 1,045 422.60 1,074 422.64 1,103 422.68 1,132 422.72 1,161 422.76 1,190 422.80 1,218 422.84 1,247 422.88 1,276 422.92 1,304 422.96 1,332 423.00 1,360 423.04 1,388 423.08 1,416 423.12 1,444 423.16 1,471 423.20 1,498 423.24 1.526 Elevation Storage (feet) (cubic -feet) 423.28 1,553 423.32 1,580 423.36 1,607 423.40 1,633 423.44 1,660 423.48 1,686 423.52 1,712 423.56 1,738 423.60 1,764 423.64 1,790 423.68 1,815 423.72 1,841 423.76 1,866 423.80 1,891 423.84 1,915 423.88 1,940 423.92 1,964 423.96 1,989 424.00 2,013 424.04 2,036 424.08 2,060 424.12 2,083 424.16 2,106 424.20 2,129 424.24 2,152 424.28 2,174 424.32 2,197 424.36 2,219 424.40 2,240 424.44 2,262 424.48 2,283 424.52 2,304 424.56 2,325 424.60 2,345 424.64 2,365 424.68 2,385 424.72 2,405 424.76 2,424 424.80 2,443 424.84 2,462 424.88 2,480 424.92 2,498 424.96 2,515 425.00 2,533 425.04 2,550 425.08 2,566 425.12 2,582 425.16 2,598 425.20 2,614 425.24 2,628 425.28 2,643 425.32 2,657 Elevation Storage (feet) (cubic -feet) 425.36 2,671 425.40 2,684 425.44 2,696 425.48 2,708 425.52 2,719 425.56 2,730 425.60 2,740 425.64 2,749 425.68 2,758 425.72 2,765 425.76 2,771 425.80 2,775 425.84 2,779 425.88 2,783 425.92 2,786 425.96 2,788 426.00 2,791 426.04 2,793 426.08 2,794 426.12 2,795 426.16 2,796 426.20 2,797 426.24 2,797 426.28 2,797 426.32 2,797 426.36 2,797 426.40 2,798 426.44 2,798 426.48 2,798 426.52 2,798 426.56 2,798 426.60 2,798 426.64 2,798 426.68 2,799 426.72 2,799 426.76 2,799 426.80 2,799 426.84 2,799 426.88 2,799 426.92 2,800 426.96 2,800 427.00 2,800 427.04 2,800 427.08 2,800 427.12 2,800 427.16 2,800 427.20 2,801 Post -West Type 11 24 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 43 Summary for Link 8L: (new Link) Inflow Area = 0.930 ac, 67.74% Impervious, Inflow Depth > 3.98" for 10 -Year event Inflow = 4.30 cfs @ 12.00 hrs, Volume= 0.309 of Primary = 4.30 cfs @ 12.00 hrs, Volume= 0.309 af, Atten= 0 %, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs 1 z N w V 3 O LL 1 Link 8L: (new Link) Hydrograph 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) ■ Inflow ■ Primary Post -West Type 11 24 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 HvdroCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 44 Hydrograph for Link 8L: (new Link) Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 0.50 0.00 0.00 0.00 1.00 0.00 0.00 0.00 1.50 0.00 0.00 0.00 2.00 0.00 0.00 0.00 2.50 0.00 0.00 0.00 3.00 0.00 0.00 0.00 3.50 0.00 0.00 0.00 4.00 0.01 0.00 0.01 4.50 0.01 0.00 0.01 5.00 0.02 0.00 0.02 5.50 0.02 0.00 0.02 6.00 0.02 0.00 0.02 6.50 0.03 0.00 0.03 7.00 0.03 0.00 0.03 7.50 0.04 0.00 0.04 8.00 0.04 0.00 0.04 8.50 0.05 0.00 0.05 9.00 0.07 0.00 0.07 9.50 0.08 0.00 0.08 10.00 0.09 0.00 0.09 10.50 0.12 0.00 0.12 11.00 0.17 0.00 0.17 11.50 0.27 0.00 0.27 12.00 4.30 0.00 4.30 12.50 0.62 0.00 0.62 13.00 0.48 0.00 0.48 13.50 0.41 0.00 0.41 14.00 0.34 0.00 0.34 14.50 0.29 0.00 0.29 15.00 0.25 0.00 0.25 15.50 0.20 0.00 0.20 16.00 0.17 0.00 0.17 16.50 0.14 0.00 0.14 17.00 0.11 0.00 0.11 17.50 0.10 0.00 0.10 18.00 0.09 0.00 0.09 18.50 0.08 0.00 0.08 19.00 0.08 0.00 0.08 19.50 0.07 0.00 0.07 20.00 0.07 0.00 0.07 20.50 0.06 0.00 0.06 21.00 0.06 0.00 0.06 21.50 0.06 0.00 0.06 22.00 0.06 0.00 0.06 22.50 0.06 0.00 0.06 23.00 0.06 0.00 0.06 23.50 0.05 0.00 0.05 24.00 0.05 0.00 0.05 Post -West Type 1124 -hr 900 -Year Rainfall = 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 HvdroCAD® 10.00 s/n 06538 © 2013 HvdroCAD Software Solutions LLC Paae 45 Time span =0.00 -24.00 hrs, dt =0.01 hrs, 2401 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 5S: Post - Developed Area to Runoff Area =0.470 ac 91.49% Impervious Runoff Depth >8.47" Tc =6.0 min CN =95 Runoff=6.04 cfs 0.332 of Subcatchment 7S: Post - Developed Area to Runoff Area =0.460 ac 43.48% Impervious Runoff Depth >6.27" Tc =6.0 min CN =77 Runoff =4.96 cfs 0.240 of Pond 6P: ADS StormTech Peak Elev= 426.90' Storage =2,799 cf Inflow =6.04 cfs 0.332 of Outflow =6.14 cfs 0.329 of Link 8L: (new Link) Inflow =11.10 cfs 0.569 of Primary=11.10 cfs 0.569 of Total Runoff Area = 0.930 ac Runoff Volume = 0.572 of Average Runoff Depth = 7.38" 32.26% Pervious = 0.300 ac 67.74% Impervious = 0.630 ac Post -West Type 11 24 -hr 100 -Year Rainfall = 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCADO 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page 46 Summary for Subcatchment 5S: Post - Developed Area to West Routed Runoff = 6.04 cfs @ 11.97 hrs, Volume= 0.332 af, Depth> 8.47' Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 100 -Year Rainfall= 9.08" Area (ac) CN Descriotion 0.430 98 Paved parking, HSG B 0.040 61 >75% Grass cover, Good, HSG B 0.470 95 Weighted Average 0.040 8.51 % Pervious Area 0.430 91.49% Impervious Area Tc Length Slope Velocity Capacity Description min (feet) (ft/ft) (ft/sec) (cfs 6.0 Direct Entry, Subcatchment 5S: Post - Developed Area to West Routed Hydrograph Runoff 6 5 4 N 3 o� LL 2 1 Type 1124 -h r 100 -Year Rainfall= 9.08" Runoff Area =0.470 ac Runoff Volume =0.332 of Runoff Depth >8.47" Tc =6.0 min CN =95 o - 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 -West Type 11 24 -hr 100 -Year Rainfall = 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 47 Hydrograph for Subcatchment 5S: Post - Developed Area to West Routed Time Precip. Excess Runoff (hours) [inches] (inches) (cfs) 0.00 0.00 0.00 0.00 0.50 0.05 0.00 0.00 1.00 0.10 0.00 0.00 1.50 0.15 0.00 0.01 2.00 0.20 0.01 0.01 2.50 0.26 0.03 0.02 3.00 0.31 0.06 0.03 3.50 0.37 0.09 0.03 4.00 0.44 0.13 0.04 4.50 0.50 0.17 0.04 5.00 0.57 0.22 0.05 5.50 0.65 0.27 0.05 6.00 0.73 0.34 0.06 6.50 0.81 0.40 0.07 7.00 0.90 0.48 0.07 7.50 0.99 0.56 0.08 8.00 1.09 0.64 0.08 8.50 1.20 0.74 0.10 9.00 1.33 0.86 0.12 9.50 1.48 0.99 0.13 10.00 1.64 1.15 0.15 10.50 1.85 1.34 0.20 11.00 2.13 1.61 0.28 11.50 2.57 2.03 0.46 12.00 6.02 5.43 5.50 12.50 6.67 6.08 0.46 13.00 7.01 6.42 0.28 13.50 7.25 6.66 0.21 14.00 7.45 6.85 0.17 14.50 7.61 7.01 0.15 15.00 7.75 7.15 0.13 15.50 7.88 7.28 0.12 16.00 7.99 7.39 0.10 16.50 8.09 7.49 0.09 17.00 8.19 7.59 0.09 17.50 8.28 7.68 0.08 18.00 8.36 7.76 0.08 18.50 8.44 7.84 0.07 19.00 8.51 7.91 0.07 19.50 8.58 7.98 0.06 20.00 8.64 8.04 0.06 20.50 8.70 8.10 0.05 21.00 8.76 8.16 0.05 21.50 8.82 8.21 0.05 22.00 8.87 8.27 0.05 22.50 8.93 8.32 0.05 23.00 8.98 8.38 0.05 23.50 9.03 8.43 0.05 24.00 9.08 8.48 0.05 Post -West Type 11 24 -hr 100 -Year Rainfall = 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD@ 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 48 Summary for Subcatchment 7S: Post - Developed Area to West Runoff = 4.96 cfs @ 11.97 hrs, Volume= 0.240 af, Depth> 6.27' Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 100 -Year Rainfall= 9.08" Area (ac) CN Description 0.200 98 Paved parking, HSG B 0.260 61 >75% Grass cover, Good, HSG B 0.460 77 Weighted Average 0.260 56.52% Pervious Area 0.200 43.48% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, 5 T 3 3 0 LL Subcatchment 7S: Post - Developed Area to West Hydrograph i •h. Type II 24 -hr 100 -Year Rainfall= 9.08" Runoff Area =0.460 ac Runoff Volume =0.240 of Runoff Depth >6.27" Tc =6.0 min CN =77 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 -West Type 11 24 -hr 100 -Year Rainfall = 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 HvdroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 49 Hydrograph for Subcatchment 7S: Post - Developed Area to West Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.50 0.05 0.00 0.00 1.00 0.10 0.00 0.00 1.50 0.15 0.00 0.00 2.00 0.20 0.00 0.00 2.50 0.26 0.00 0.00 3.00 0.31 0.00 0.00 3.50 0.37 0.00 0.00 4.00 0.44 0.00 0.00 4.50 0.50 0.00 0.00 5.00 0.57 0.00 0.00 5.50 0.65 0.00 0.00 6.00 0.73 0.01 0.01 6.50 0.81 0.01 0.01 7.00 0.90 0.03 0.01 7.50 0.99 0.05 0.02 8.00 1.09 0.07 0.02 8.50 1.20 0.10 0.03 9.00 1.33 0.15 0.05 9.50 1.48 0.20 0.05 10.00 1.64 0.27 0.07 10.50 1.85 0.37 0.10 11.00 2.13 0.52 0.16 11.50 2.57 0.78 0.29 12.00 6.02 3.50 4.58 12.50 6.67 4.07 0.41 13.00 7.01 4.37 0.25 13.50 7.25 4.60 0.19 14.00 7.45 4.77 0.15 14.50 7.61 4.91 0.13 15.00 7.75 5.05 0.12 15.50 7.88 5.16 0.10 16.00 7.99 5.27 0.09 16.50 8.09 5.36 0.09 17.00 8.19 5.45 0.08 17.50 8.28 5.53 0.08 18.00 8.36 5.61 0.07 18.50 8.44 5.68 0.07 19.00 8.51 5.75 0.06 19.50 8.58 5.81 0.06 20.00 8.64 5.87 0.05 20.50 8.70 5.92 0.05 21.00 8.76 5.98 0.05 21.50 8.82 6.03 0.05 22.00 8.87 6.08 0.05 22.50 8.93 6.13 0.05 23.00 8.98 6.18 0.05 23.50 9.03 6.23 0.04 24.00 9.08 6.27 0.04 Post -West Type 11 24 -hr 100 -Year Rainfall = 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 HvdroCAD Software Solutions LLC Page 50 Summary for Pond 6P: ADS StormTech [88] Warning: Qout >Qin may require smaller dt or Finer Routing Inflow Area = 0.470 ac, 91.49% Impervious, Inflow Depth > 8.47" for 100 -Year event Inflow = 6.04 cfs @ 11.97 hrs, Volume= 0.332 of Outflow = 6.14 cfs @ 11.97 hrs, Volume= 0.329 af, Atten= 0 %, Lag= 0.1 min Primary = 6.14 cfs @ 11.97 hrs, Volume= 0.329 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Peak Elev= 426.90' @ 11.97 hrs Surf.Area= 970 sf Storage= 2,799 cf Plug -Flow detention time= 42.4 min calculated for 0.329 of (99% of inflow) Center -of -Mass det. time= 36.3 min ( 786.0 - 749.8 ) Volume Invert Avail.Stora a Storage Description #1 421.20' 12 cf Custom Stage Data (Prismatic) Listed below (Recalc) 5,820 cf Overall - 2,789 cf Embedded = 3,031 cf x 0.4% Voids #2 421.20' 2,789 cf ADS _StormTech MC -4500 +Cap @ 100.00'L Inside #1 Effective Size= 90.4 "W x 60.0 "H => 26.46 sf x 100.001 = 2,645.7 cf Overall Size= 100.0 "W x 60.0 "H x 4.33'L with 0.31' Overlap Cap Stora e= +35.7 cf x 2 x 2 rows = 142.8 cf 2,801 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq -ft) (cubic -feet) (cubic -feet) 421.20 970 0 0 427.20 970 5,820 5,820 Device Routing Invert Outlet Devices #1 Primary 421.20' 15.0" Round Culvert L= 50.0' Ke= 0.500 Inlet/ Outlet Invert= 421.20'/420.70' S=0.0100'/' Cc= 0.900 n= 0.013, Flow Area= 1.23 sf #2 Device 1 426.20' Custom Weir /Orifice, Cv= 2.62 (C= 3.28) Head (feet) 326.20 326.70 326.70 327.20 Width (feet) 1.00 1.00 4.00 4.00 #3 Device 1 421.20' 3.0" Vert. Orifice /Grate C= 0.600 #4 Device 1 423.80' 8.0" Vert. Orifice /Grate C= 0.600 Primary OutFlow Max =6.13 cfs @ 11.97 hrs HW= 426.90' (Free Discharge) t--1 =Culvert (Passes 6.13 cfs of 13.31 cfs potential flow) P4_Orifice/Grate = Custom Weir /Orifice (Weir Controls 2.78 cfs @ 2.15 fps) = Orifice /Grate (Orifice Controls 0.56 cfs @ 11.37 fps) (Orifice Controls 2.79 cfs @ 8.01 fps) Post -West Type 11 24 -hr 100 -Year Rainfall= 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCADO 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 51 Pond 6P: ADS StormTech Hydrograph 6 5 w v 3 0 LL 3 2 1 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) 427 426 425 d d w c 0 424 d w 423 422 Pond 6P: ADS StormTech Stage- Discharge 0 1 2 3 4 5 6 7 8 9 10 Discharge (cfs) Inflow Primary ■ Primary Post -West Prepared by TG- MOSYSCON HvdroCAD® 10.00 s/n 06538 © 2013 427 426 ,125 0 m w c 0 .5 •124 a� w 423 422 Type /I 24 -hr 100 -Year Rainfall = 9.08" Printed 11/18/2015 roCAD Software Solutions LLC Pond 6P: ADS StormTech Stage- Area - Storage 0 500 1,000 1,500 2,000 2,500 Storage (cubic -feet) D Stnray� 52 Post -West Type // 24 -hr 100 -Year Rainf611= 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD@] 10.00 s/n 06538 @2013 F1 droCAO Software Solutions LLC Page 53 Hydrograph for Pond 6P: ADS StorrnTech Time Inflow Storage Elevation Primary fours cfs cubic -feet feet cfs 0.00 0.00 0 421.20 0.00 0.50 0.00 0 421.20 0.00 1.00 0.00 0 421.20 0.00 1.50 0.01 3 421.20 0.00 2.00 0.01 17 421.22 0.00 2.50 0.02 39 421.25 0.01 3.00 0.03 64 421.28 0.01 3.50 0.03 84 421.31 0.02 4.00 0.04 99 421.32 0.03 4.50 0.04 111 421.34 0.04 5.00 0.05 122 421.35 0.04 5.50 0.05 132 421.37 0.05 6.00 0.06 143 421.38 0.05 6.50 0.07 153 421.39 0.06 7.00 0.07 163 421.41 0.07 7.50 0.08 173 421.42 0.07 8.00 0.08 183 421.43 0.08 8.50 0.10 200 421.45 0.08 9.00 0.12 236 421.50 0.10 9.50 0.13 272 421.54 0.11 10.00 0.15 313 421.60 0.12 10.50 0.20 392 421.70 0.14 11.00 0.28 536 421.88 0.18 11.50 0.46 828 422.27 0.23 12.00 5.50 2,799 426.83 5.41 12.50 0.46 2,036 424.04 0.58 13.00 0.28 1,881 423.78 0.37 13.50 0.21 1,673 423.46 0.35 14.00 0.17 1,418 423.08 0.31 14.50 0.15 1,163 422.72 0.28 15.00 0.13 939 422.42 0.25 15.50 0.12 746 422.16 0.22 16.00 0.10 581 421.94 0.19 16.50 0.09 447 421.77 0.16 17.00 0.09 351 421.64 0.13 17.50 0.08 283 421.56 0.11 18.00 0.08 238 421.50 0.10 18.50 0.07 207 421.46 0.09 19.00 0.07 185 421.43 0.08 19.50 0.06 169 421.41 0.07 20.00 0.06 157 421.40 0.06 20.50 0.05 149 421.39 0.06 21.00 0.05 145 421.38 0.06 21.50 0.05 142 421.38 0.05 22.00 0.05 140 421.38 0.05 22.50 0.05 138 421.37 0.05 23.00 0.05 136 421.37 0.05 23.50 0.05 134 421.37 0.05 24.00 0.05 132 421.37 0.05 Post -West Type// 24 -hr 100 -Year Rainfall= 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCADO 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 54 Elevation Primary (feet) (cfs) 421.20 0.00 421.24 0.00 421.28 0.01 421.32 0.03 421.36 0.05 421.40 0.06 421.44 0.08 421.48 0.09 421.52 0.10 421.56 0.11 421.60 0.12 421.64 0.13 421.68 0.14 421.72 0.15 421.76 0.16 421.80 0.16 421.84 0.17 421.88 0.18 421.92 0.18 421.96 0.19 422.00 0.19 422.04 0.20 422.08 0.21 422.12 0.21 422.16 0.22 422.20 0.22 422.24 0.23 422.28 0.23 422.32 0.24 422.36 0.24 422.40 0.25 422.44 0.25 422.48 0.25 422.52 0.26 422.56 0.26 422.60 0.27 422.64 0.27 422.68 0.28 422.72 0.28 422.76 0.28 422.80 0.29 422.84 0.29 422.88 0.29 422.92 0.30 422.96 0.30 423.00 0.31 423.04 0.31 423.08 0.31 423.12 0.32 423.16 0.32 423.20 0.32 423.24 0.33 Stage- Discharge for Pond 6P: ADS StorrnTech Elevation Primary (feet) (cfs) 423.28 0.33 423.32 0.33 423.36 0.34 423.40 0.34 423.44 0.34 423.48 0.35 423.52 0.35 423.56 0.35 423.60 0.36 423.64 0.36 423.68 0.36 423.72 0.37 423.76 0.37 423.80 0.37 423.84 0.38 423.88 0.40 423.92 0.43 423.96 0.47 424.00 0.52 424.04 0.58 424.08 0.64 424.12 0.71 424.16 0.79 424.20 0.87 424.24 0.96 424.28 1.04 424.32 1.13 424.36 1.21 424.40 1.29 424.44 1.36 424.48 1.41 424.52 1.47 424.56 1.52 424.60 1.58 424.64 1.63 424.68 1.68 424.72 1.72 424.76 1.77 424.80 1.81 424.84 1.86 424.88 1.90 424.92 1.94 424.96 1.98 425.00 2.02 425.04 2.06 425.08 2.09 425.12 2.13 425.16 2.17 425.20 2.20 425.24 2.24 425.28 2.27 425.32 2.30 Elevation Primary (feet) (cfs) 425.36 2.34 425.40 2.37 425.44 2.40 425.48 2.43 425.52 2.46 425.56 2.49 425.60 2.52 425.64 2.55 425.68 2.58 425.72 2.61 425.76 2.64 425.80 2.67 425.84 2.70 425.88 2.73 425.92 2.75 425.96 2.78 426.00 2.81 426.04 2.83 426.08 2.86 426.12 2.89 426.16 2.91 426.20 2.94 426.24 2.99 426.28 3.06 426.32 3.15 426.36 3.25 426.40 3.36 426.44 3.47 426.48 3.60 426.52 3.73 426.56 3.87 426.60 4.01 426.64 4.16 426.68 4.32 426.72 4.51 426.76 4.79 426.80 5.13 426.84 5.51 426.88 5.93 426.92 6.38 426.96 6.86 427.00 7.37 427.04 7.90 427.08 8.46 427.12 9.04 427.16 9.64 427.20 10.26 Post -West Type 11 24 -hr 100 -Year Rainfall= 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 55 Elevation Storage (feet) (cubic -feet) 421.20 0 421.24 32 421.28 64 421.32 95 421.36 127 421.40 158 421.44 190 421.48 221 421.52 253 421.56 284 421.60 316 421.64 347 421.68 378 421.72 409 421.76 440 421.80 471 421.84 502 421.88 533 421.92 564 421.96 594 422.00 625 422.04 655 422.08 686 422.12 716 422.16 747 422.20 777 422.24 807 422.28 837 422.32 867 422.36 897 422.40 927 422.44 956 422.48 986 422.52 1,015 422.56 1.045 422.60 1,074 422.64 1,103 422.68 1,132 422.72 1.161 422.76 1,190 422.80 1,218 422.84 1,247 422.88 1,276 422.92 1,304 422.96 1,332 423.00 1,360 423.04 1,388 423.08 1,416 423.12 1,444 423.16 1,471 423.20 1,498 423.24 1,526 Stage -Area- Storage for Pond 6P: ADS StormTech Elevation Storage (feet) (cubic -feet) 423.28 1,553 423.32 1,580 423.36 1,607 423.40 1,633 423.44 1,660 423.48 1,686 423.52 1,712 423.56 1,738 423.60 1,764 423.64 1,790 423.68 1,815 423.72 1,841 423.76 1,866 423.80 1,891 423.84 1,915 423.88 1,940 423.92 1,964 423.96 1,989 424.00 2,013 424.04 2,036 424.08 2,060 424.12 2,083 424.16 2,106 424.20 2,129 424.24 2,152 424.28 2,174 424.32 2,197 424.36 2,219 424.40 2,240 424.44 2,262 424.48 2,283 424.52 2,304 424.56 2,325 424.60 2,345 424.64 2,365 424.68 2,385 424.72 2,405 424.76 2,424 424.80 2,443 424.84 2,462 424.88 2,480 424.92 2,498 424.96 2,515 425.00 2,533 425.04 2,550 425.08 2,566 425.12 2,582 425.16 2,598 425.20 2,614 425.24 2,628 425.28 2,643 425.32 2,657 Elevation Storage (feet) (cubic -feet) 425.36 2,671 425.40 2,684 425.44 2,696 425.48 2,708 425.52 2,719 425.56 2,730 425.60 2,740 425.64 2,749 425.68 2,758 425.72 2,765 425.76 2,771 425.80 2,775 425.84 2,779 425.88 2,783 425.92 2,786 425.96 2,788 426.00 2,791 426.04 2,793 426.08 2,794 426.12 2,795 426.16 2,796 426.20 2,797 426.24 2,797 426.28 2,797 426.32 2,797 426.36 2,797 426.40 2,798 426.44 2,798 426.48 2,798 426.52 2,798 426.56 2,798 426.60 2,798 426.64 2,798 426.68 2,799 426.72 2,799 426.76 2,799 426.80 2,799 426.84 2,799 426.88 2,799 426.92 2,800 426.96 2,800 427.00 2,800 427.04 2,800 427.08 2,800 427.12 2,800 427.16 2,800 427.20 2,801 Post -West Type 11 24 -hr 100 -Year Rainfall = 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 56 Summary for Link 8L: (new Link) Inflow Area = 0.930 ac, 67.74% Impervious, Inflow Depth > 7.34" for 100 -Year event Inflow = 11.10 cfs @ 11.97 hrs, Volume= 0.569 of Primary = 11.10 cfs @ 11.97 hrs, Volume= 0.569 af, Atten= 0 %, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs N w V 3 O LL Link 8L: (new Link) Hydrograph 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) FE-1 n-fl o—w ■ Primary Post -West Type // 24 -hr 100 -Year Rainfall = 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD010.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 57 Hydrograph for Link 8L: (new Link) Time Inflow Elevation Primary (hours) cfs (feet) cfs 0.00 0.00 0.00 0.00 0.50 0.00 0.00 0.00 1.00 0.00 0.00 0.00 1.50 0.00 0.00 0.00 2.00 0.00 0.00 0.00 2.50 0.01 0.00 0.01 3.00 0.01 0.00 0.01 3.50 0.02 0.00 0.02 4.00 0.03 0.00 0.03 4.50 0.04 0.00 0.04 5.00 0.04 0.00 0.04 5.50 0.05 0.00 0.05 6.00 0.06 0.00 0.06 6.50 0.07 0.00 0.07 7.00 0.08 0.00 0.08 7.50 0.09 0.00 0.09 8.00 0.10 0.00 0.10 8.50 0.12 0.00 0.12 9.00 0.14 0.00 0.14 9.50 0.16 0.00 0.16 10.00 0.19 0.00 0.19 10.50 0.25 0.00 0.25 11.00 0.34 0.00 0.34 11.50 0.52 0.00 0.52 12.00 9.99 0.00 9.99 12.50 0.98 0.00 0.98 13.00 0.62 0.00 0.62 13.50 0.53 0.00 0.53 14.00 0.46 0.00 0.46 14.50 0.41 0.00 0.41 15.00 0.36 0.00 0.36 15.50 0.32 0.00 0.32 16.00 0.28 0.00 0.28 16.50 0.24 0.00 0.24 17.00 0.21 0.00 0.21 17.50 0.19 0.00 0.19 18.00 0.17 0.00 0.17 18.50 0.15 0.00 0.15 19.00 0.14 0.00 0.14 19.50 0.13 0.00 0.13 20.00 0.11 0.00 0.11 20.50 0.11 0.00 0.11 21.00 0.10 0.00 0.10 21.50 0.10 0.00 0.10 22.00 0.10 0.00 0.10 22.50 0.10 0.00 0.10 23.00 0.10 0.00 0.10 23.50 0.09 0.00 0.09 24.00 0.09 0.00 0.09 Post -bevel ped Area to S uth Pipe Storage South 5uhcat Reach an Lin k Post -South Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCADO 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Paae 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment- numbers) 0.330 61 >75% Grass cover, Good, HSG B (1 S) 0.460 98 Paved parking, HSG B (1 S) 0.790 83 TOTAL AREA Post -South Prepared by TG- MOSYSCON HvdroCAD® 10.00 s/n 06538 © 2013 HvdroCAD Software Solutions LLC Soil Listing (all nodes) Area (acres) Soil Group Subcatchment Numbers 0.000 HSG A 0.790 HSG B is 0.000 HSG C 0.000 HSG D 0.000 Other 0.790 TOTAL AREA Printed 11/18/2015 Pace 3 Post -South Prepared by TG- MOSYSCON H droCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLG Printed 11/18/2015 Page 4 Ground Covers (all nodes) HSG -A HSG -B HSG -C HSG -D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.330 0.000 0.000 0.000 0.330 >75% Grass cover, Good is 0.000 0.460 0.000 0.000 0.000 0.460 Paved parking is 0.000 0.790 0.000 0.000 0.000 0.790 TOTAL AREA Post -South Prepared by TG- MOSYSCON Printed 11/18/2015 HvdroCAD® 10.00 s/n 06538 @2013 HvdroCAD Software Solutions LLC Paqe 5 Pipe Listing (all nodes) Line# Node In- Invert Out -Invert Length Slope n Diam/Width Height Inside -Fill Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) 1 3P 431.50 431.00 50.0 0.0100 0.013 15.0 0.0 0.0 Post -South Type 11 24 -hr 1 -Year Rainfall = 3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 Hydro CAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Paae 6 Time span =0.00 -24.00 hrs, dt =0.01 hrs, 2401 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 1S: Post - Developed Area to Runoff Area =0.790 ac 58.23% Impervious Runoff Depth >1.47" Tc =6.0 min CN =83 Runoff =2.08 cfs 0.097 of Pond 3P: Pipe Storage South Peak Elev= 433.02' Storage =0.015 of Inflow =2.08 cfs 0.097 of Outflow =1.24 cfs 0.096 of Total Runoff Area = 0.790 ac Runoff Volume = 0.097 of Average Runoff Depth =1.47" 41.77% Pervious = 0.330 ac 58.23% Impervious = 0.460 ac Post -South Type// 24 -hr 1 -Year Rainfall = 3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 7 Summary for Subcatchment 1S: Post - Developed Area to South Runoff = 2.08 cfs @ 11.97 hrs, Volume= 0.097 af, Depth> 1.47' Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 1 -Year Rainfall= 3.03" Area (ac) CN Description 0.460 98 Paved parking, HSG B 0.330 61 >75% Grass cover, Good, HSG B 0.790 83 Weighted Average 0.330 41.77% Pervious Area 0.460 58.23% Impervious Area Tc Length Slope Velocity Capacity Description min (feet) (ft/ft) (fUsec) (cfs) 6.0 Direct Entry, 2 3 0 LL Subcatchment 1S: Post - Developed Area to South Hydrograph f Type 11:24 -hr 1 -Year Rainfall= 3.03" Runoff Area =0.790 ac Runoff Volume =0.097 of Runoff Depth >1.47" Tc =6.0 min CN =83 rw�fErr i � � ter r -- 1 1 2 3 4 5 6 7 8 9 1 1 1 Time (hours) ❑ RunaN Post -South Type 1124 -hr 1 -Year Rainfall = 3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page $ Hydrograph for Subcatchment 1S: Post - Developed Area to South Time Precip. Excess Runoff (hours) (inches) inches? cfs 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.03 0.00 0.00 1.50 0.05 0.00 0.00 2.00 0.07 0.00 0.00 2.50 0.09 0.00 0.00 3.00 0.10 0.00 0.00 3.50 0.12 0.00 0.00 4.00 0.15 0.00 0.00 4.50 0.17 0.00 0.00 5.00 0.19 0.00 0.00 5.50 0.22 0.00 0.00 6.00 0.24 0.00 0.00 6.50 0.27 0.00 0.00 7.00 0.30 0.00 0.00 7.50 0.33 0.00 0.00 8.00 0.36 0.00 0.00 8.50 0.40 0.00 0.00 9.00 0.45 0.00 0.00 9.50 0.49 0.00 0.01 10.00 0.55 0.01 0.01 10.50 0.62 0.02 0.02 11.00 0.71 0.04 0.04 11.50 0.86 0.08 0.08 12.00 2.01 0.70 1.96 12.50 2.23 0.85 0.19 13.00 2.34 0.94 0.12 13.50 2.42 1.00 0.09 14.00 2.48 1.04 0.07 14.50 2.54 1.08 0.06 15.00 2.59 1.12 0.06 15.50 2.63 1.15 0.05 16.00 2.67 1.18 0.04 16.50 2.70 1.21 0.04 17.00 2.73 1.23 0.04 17.50 2.76 1.26 0.04 18.00 2.79 1.28 0.03 18.50 2.82 1.30 0.03 19.00 2.84 1.32 0.03 19.50 2.86 1.34 0.03 20.00 2.88 1.35 0.03 20.50 2.90 1.37 0.02 21.00 2.92 1.38 0.02 21.50 2.94 1.40 0.02 22.00 2.96 1.41 0.02 22.50 2.98 1.43 0.02 23.00 3.00 1.44 0.02 23.50 3.01 1.46 0.02 24.00 3.03 1.47 0.02 Post -South Type 11 24 -hr 1 -Year Rainfall =3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 9 Summary for Pond 3P: Pipe Storage South Inflow Area = 0.790 ac, 58.23% Impervious, Inflow Depth > 1.47" for 1 -Year event Inflow = 2.08 cfs @ 11.97 hrs, Volume= 0.097 of Outflow = 1.24 cfs @ 12.05 hrs, Volume= 0.096 af, Atten= 40 %, Lag= 4.5 min Primary = 1.24 cfs @ 12.05 hrs, Volume= 0.096 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Peak Elev= 433.02' @ 12.05 hrs Surf.Area= 0.013 ac Storage= 0.015 of Plug -Flow detention time= 5.8 min calculated for 0.096 of (100% of inflow) Center -of -Mass det. time= 4.6 min ( 836.0 - 831.3 ) Volume Invert Avail.Storage Storage Description #1 431.50' 0.056 of 60.0" Round Pipe Storage L= 125.0' Device Routina Invert Outlet Devices #1 Primary 431.50' 15.0" Round Culvert L= 50.0' Ke= 0.500 Inlet/ Outlet Invert= 431.50'/ 431.00' S=0.0100'/' Cc= 0.900 n= 0.013, Flow Area= 1.23 sf #2 Device 1 431.50' 6.5" Vert. Orifice /Grate C= 0.600 #3 Device 1 433.50' 6.0" Vert. Orifice /Grate C= 0.600 #4 Device 1 435.50' Custom Weir /Orifice, Cv= 2.62 (C= 3.28) Head (feet) 335.50 336.50 Width (feet) 4.00 4.00 Primary OutFlow Max =1.24 cfs @ 12.05 hrs HW= 433.02' (Free Discharge) L1 = Culvert (Passes 1.24 cfs of 5.60 cfs potential flow) 2= Orifice /Grate (Orifice Controls 1.24 cfs @ 5.39 fps) 3= Orifice /Grate ( Controls 0.00 cfs) 4=Custom Weir /Orifice ( Controls 0.00 cfs) Post -South Type // 24 -hr 1 -Year Rainfall =3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCADO 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 10 K 3 0 LL 1 d m w c 0 m w 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) Pond 313: Pipe Storage South Hydrograph Pond 3P: Pipe Storage South Stage- Discharge 0 1 2 3 4 5 6 7 8 9 10 11 12 Discharge (cfs) ■ Inflow ■ Primary 19 Prima Post -South Type 11 24 -hr 1 -Year Rainfall= 3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 11 436 435 m d o 434 A d w 433 432 Pond 3P: Pipe Storage South Stage- Area - Storage Pipe Storage 0.005 0.01 0 015 0.02 0.025 0.03 0.035 0.04 0.045 005 0.055 Storage (acre -feet) ■ Storage Post -South Type // 24 -hr 1 -Year Rainfall= 3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 12 Hydrograph for Pond 3P: Pipe Storage South Time Inflow Storage Elevation Primary hours ) (cfs) (acre -feet feet cfs 0.00 0.00 0.000 431.50 0.00 0.50 0.00 0.000 431.50 0.00 1.00 0.00 0.000 431.50 0.00 1.50 0.00 0.000 431.50 0.00 2.00 0.00 0.000 431.50 0.00 2.50 0.00 0.000 431.50 0.00 3.00 0.00 0.000 431.50 0.00 3.50 0.00 0.000 431.50 0.00 4.00 0.00 0.000 431.50 0.00 4.50 0.00 0.000 431.50 0.00 5.00 0.00 0.000 431.50 0.00 5.50 0.00 0.000 431.50 0.00 6.00 0.00 0.000 431.50 0.00 6.50 0.00 0.000 431.50 0.00 7.00 0.00 0.000 431.50 0.00 7.50 0.00 0.000 431.50 0.00 8.00 0.00 0.000 431.50 0.00 8.50 0.00 0.000 431.50 0.00 9.00 0.00 0.000 431.51 0.00 9.50 0.01 0.000 431.53 0.00 10.00 0.01 0.000 431.55 0.01 10.50 0.02 0.000 431.57 0.02 11.00 0.04 0.000 431.60 0.03 11.50 0.08 0.001 431.66 0.08 12.00 1.96 0.013 432.90 1.18 12.50 0.19 0.001 431.79 0.23 13.00 0.12 0.001 431.70 0.12 13.50 0.09 0.001 431.67 0.09 14.00 0.07 0.001 431.65 0.07 14.50 0.06 0.000 431.64 0.06 15.00 0.06 0.000 431.63 0.06 15.50 0.05 0.000 431.63 0.05 16.00 0.04 0.000 431.62 0.05 16.50 0.04 0.000 431.61 0.04 17.00 0.04 0.000 431.61 0.04 17.50 0.04 0.000 431.61 0.04 18.00 0.03 0.000 431.60 0.03 18.50 0.03 0.000 431.60 0.03 19.00 0.03 0.000 431.60 0.03 19.50 0.03 0.000 431.59 0.03 20.00 0.03 0.000 431.59 0.03 20.50 0.02 0.000 431.59 0.02 21.00 0.02 0.000 431.58 0.02 21.50 0.02 0.000 431.58 0.02 22.00 0.02 0.000 431.58 0.02 22.50 0.02 0.000 431.58 0.02 23.00 0.02 0.000 431.58 0.02 23.50 0.02 0.000 431.58 0.02 24.00 0.02 0.000 431.58 0.02 Post -South Type 11 24 -hr 1 -Year Rainfall = 3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 HvdroCAD® 10.00 s/n 06538 @2013 HvdroCAD Software Solutions LLC Page 13 Stage- Discharge for Pond 3P: Pipe Storage South Elevation Primary (feet) (cfs) 431.50 0.00 431.55 0.01 431.60 0.03 431.65 0.07 431.70 0.12 431.75 0.18 431.80 0.24 431.85 0.32 431.90 0.39 431.95 0.47 432.00 0.54 432.05 0.59 432.10 0.64 432.15 0.68 432.20 0.73 432.25 0.77 432.30 0.81 432.35 0.84 432.40 0.88 432.45 0.91 432.50 0.95 432.55 0.98 432.60 1.01 432.65 1.04 432.70 1.07 432.75 1.10 432.80 1.13 432.85 1.15 432.90 1.18 432.95 1.20 433.00 1.23 433.05 1.25 433.10 1.28 433.15 1.30 433.20 1.33 433.25 1.35 433.30 1.37 433.35 1.39 433.40 1.42 433.45 1.44 433.50 1.46 433.55 1.49 433.60 1.53 433.65 1.59 433.70 1.65 433.75 1.73 433.80 1.81 433.85 1.90 433.90 1.98 433.95 2.06 434.00 2.13 434.05 2.19 Elevation Primary (feet) (cfs) 434.10 2.25 434.15 2.31 434.20 2.36 434.25 2.42 434.30 2.47 434.35 2.51 434.40 2.56 434.45 2.61 434.50 2.65 434.55 2.70 434.60 2.74 434.65 2.78 434.70 2.82 434.75 2.86 434.80 2.90 434.85 2.94 434.90 2.98 434.95 3.01 435.00 3.05 435.05 3.09 435.10 3.12 435.15 3.16 435.20 3.19 435.25 3.23 435.30 3.26 435.35 3.29 435.40 3.33 435.45 3.36 435.50 3.39 435.55 3.57 435.60 3.87 435.65 4.25 435.70 4.69 435.75 5.19 435.80 5.73 435.85 6.32 435.90 6.95 435.95 7.63 436.00 8.33 436.05 9.07 436.10 9.85 436.15 10.65 436.20 11.49 436.25 12.00 436.30 12.07 436.35 12.15 436.40 12.22 436.45 12.29 436.50 12.36 Post -South Type 11 24 -hr 1 -Year Rainfall =3.03" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 14 Stage -Area- Storage for Pond 3P: Pipe Storage South Elevation Storage (feet) (acre -feet) 431.50 0.000 431.55 0.000 431.60 0.000 431.65 0.000 431.70 0.001 431.75 0.001 431.80 0.001 431.85 0.002 431.90 0.002 431.95 0.003 432.00 0.003 432.05 0.003 432.10 0.004 432.15 0.004 432.20 0.005 432.25 0.005 432.30 0.006 432.35 0.006 432.40 0.007 432.45 0.007 432.50 0.008 432.55 0.009 432.60 0.009 432.65 0.010 432.70 0.010 432.75 0.011 432.80 0.012 432.85 0.012 432.90 0.013 432.95 0.014 433.00 0.014 433.05 0.015 433.10 0.016 433.15 0.016 433.20 0.017 433.25 0.018 433.30 0.018 433.35 0.019 433.40 0.020 433.45 0.020 433.50 0.021 433.55 0.022 433.60 0.022 433.65 0.023 433.70 0.024 433.75 0.025 433.80 0.025 433.85 0.026 433.90 0.027 433.95 0.027 434.00 0.028 434.05 0.029 Elevation Storage (feet) (acre -feet) 434.10 0.030 434.15 0.030 434.20 0.031 434.25 0.032 434.30 0.032 434.35 0.033 434.40 0.034 434.45 0.035 434.50 0.035 434.55 0.036 434.60 0.037 434.65 0.037 434.70 0.038 434.75 0.039 434.80 0.039 434.85 0.040 434.90 0.041 434.95 0.041 435.00 0.042 435.05 0.043 435.10 0.043 435.15 0.044 435.20 0.045 435.25 0.045 435.30 0.046 435.35 0.047 435.40 0.047 435.45 0.048 435.50 0.048 435.55 0.049 435.60 0.049 435.65 0.050 435.70 0.051 435.75 0.051 435.80 0.052 435.85 0.052 435.90 0.053 435.95 0.053 436.00 0.053 436.05 0.054 436.10 0.054 436.15 0.055 436.20 0.055 436.25 0.055 436.30 0.056 436.35 0.056 436.40 0.056 436.45 0.056 436.50 0.056 Post -South Type// 24 -hr 2 -Year Rainfall = 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 15 Time span =0.00 -24.00 hrs, dt =0.01 hrs, 2401 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 1S: Post - Developed Area to Runoff Area =0.790 ac 58.23% Impervious Runoff Depth >1.99" Tc =6.0 min CN =83 Runoff =2.80 cfs 0.131 of Pond 312: Pipe Storage South Peak Elev= 433.60' Storage =0.022 of Inflow =2.80 cfs 0.131 of Outflow =1.53 cfs 0.131 of Total Runoff Area = 0.790 ac Runoff Volume = 0.131 of Average Runoff Depth = 1.99" 41.77% Pervious = 0.330 ac 58.23% Impervious = 0.460 ac Post -South Type 11 24 -hr 2 -Year Rainfall = 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 16 Summary for Subcatchment 1 S: Post - Developed Area to South Runoff = 2.80 cfs @ 11.97 hrs, Volume= 0.131 af, Depth> 1.99" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 2 -Year Rainfall= 3.66" Area (ac) CN Descriotion 0.460 98 Paved parking, HSG B 0.330 61 >75% Grass cover, Good, HSG B 0.790 83 Weighted Average 0.330 41.77% Pervious Area 0.460 58.23% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (fUft) (ft/sec) (cfs) 6.0 Direct Entry, N 0 LL 3 2 1 Subcatchment 1S: Post - Developed Area to South Hydrog raph ldd Type II 24 -hr 2 -Year Rainfall= 3.66" Runoff Area =0.790 ac Runoff Volume =0.131 of Runoff Depth >1.99" Tc =6.0 min CN =83 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) Runoff Post -South Type// 24 -hr 2 -Year Rainfall = 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 17 Hydrograph for Subcatchment IS: Post - Developed Area to South Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.04 0.00 0.00 1.50 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.50 0.10 0.00 0.00 3.00 0.13 0.00 0.00 3.50 0.15 0.00 0.00 4.00 0.18 0.00 0.00 4.50 0.20 0.00 0.00 5.00 0.23 0.00 0.00 5.50 0.26 0.00 0.00 6.00 0.29 0.00 0.00 6.50 0.33 0.00 0.00 7.00 0.36 0.00 0.00 7.50 0.40 0.00 0.00 8.00 0.44 0.00 0.00 8.50 0.48 0.00 0.00 9.00 0.54 0.01 0.01 9.50 0.60 0.02 0.01 10.00 0.66 0.03 0.02 10.50 0.75 0.05 0.04 11.00 0.86 0.08 0.06 11.50 1.04 0.15 0.13 12.00 2.43 1.00 2.62 12.50 2.69 1.20 0.24 13.00 2.83 1.31 0.15 13.50 2.92 1.39 0.12 14.00 3.00 1.45 0.09 14.50 3.07 1.50 0.08 15.00 3.12 1.55 0.07 15.50 3.18 1.59 0.06 16.00 3.22 1.63 0.06 16.50 3.26 1.66 0.05 17.00 3.30 1.69 0.05 17.50 3.34 1.72 0.05 18.00 3.37 1.75 0.04 18.50 3.40 1.78 0.04 19.00 3.43 1.80 0.04 19.50 3.46 1.82 0.04 20.00 3.48 1.85 0.03 20.50 3.51 1.87 0.03 21.00 3.53 1.88 0.03 21.50 3.55 1.90 0.03 22.00 3.58 1.92 0.03 22.50 3.60 1.94 0.03 23.00 3.62 1.96 0.03 23.50 3.64 1.98 0.03 24.00 3.66 1.99 0.03 Post -South Type ll 24 -hr 2 -Year Rainfall= 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 18 Summary for Pond 3P: Pipe Storage South Inflow Area = 0.790 ac, 58.23% Impervious, Inflow Depth > 1.99" for 2 -Year event Inflow = 2.80 cfs @ 11.97 hrs, Volume= 0.131 of Outflow = 1.53 cfs @ 12.05 hrs, Volume= 0.131 af, Atten= 45 %, Lag= 4.9 min Primary = 1.53 cfs @ 12.05 hrs, Volume= 0.131 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Peak Elev= 433.60' @ 12.05 hrs Surf.Area= 0.014 ac Storage= 0.022 of Plug -Flow detention time= 6.4 min calculated for 0.131 of (100% of inflow) Center -of -Mass det. time= 5.3 min ( 828.0 - 822.7 ) Volume Invert Avail.Storage Storage Description #1 431.50' 0.056 of 60.0" Round Pipe Storage L= 125.0' Device Routing Invert Outlet Devices #1 Primary 431.50' 15.0" Round Culvert L= 50.0' Ke= 0.500 Inlet/ Outlet Invert= 431.50'/431.00' S=0.0100'/' Cc= 0.900 n= 0.013, Flow Area= 1.23 sf #2 Device 1 431.50' 6.5" Vert. Orifice /Grate C= 0.600 #3 Device 1 433.50' 6.0" Vert. Orifice /Grate C= 0.600 #4 Device 1 435.50' Custom Weir /Orifice, Cv= 2.62 (C= 3.28) Head (feet) 335.50 336.50 Width (feet) 4.00 4.00 Primary OutFlow Max =1.53 cfs @ 12.05 hrs HW= 433.60' (Free Discharge) "�-1= Culvert (Passes 1.53 cfs of 7.01 cfs potential flow) 2= Orifice /Grate (Orifice Controls 1.50 cfs @ 6.51 fps) 3= Orifice /Grate (Orifice Controls 0.03 cfs @ 1.08 fps) 4= Custom WeirlOriifice ( Controls 0.00 cfs) Post -South Type// 24 -hr 2 -Year Rainfall = 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538_© 2013 HydroCAD Software Solutions LLC Page 19 Pond 3P: Pipe Storage South Hydrograph a w 3 0 LL 3 2 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) Pond 3P: Pipe Storage South Stage- Discharge 436 435 d d o 434 A m w 433 432 0 1 2 3 4 5 6 7 8 9 10 11 12 Discharge (cfs) ■ Inflow ■ Primary ■ Primary Post -South Type// 24 -hr 2 -Year Rainfall = 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 20 436 43� d d o '131 A m w 433 432 Pond 313: Pipe Storage South Stage- Area - Storage Pipe Storage 0.005 0.01 0.015 0.02 0.025 0.03 0.035 0.04 0.045 0.05 0.055 Storage (acre-feet) E:i Storage Post -South Type 11 24 -hr 2 -Year Rainfall = 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Pa a 21 Hydrograph for Pond 3P: Pipe Storage South Time Inflow Storage Elevation Primary hours (cfs) (acre -feet) (feet) (cfs) 0.00 0.00 0.000 431.50 0.00 0.50 0.00 0.000 431.50 0.00 1.00 0.00 0.000 431.50 0.00 1.50 0.00 0.000 431.50 0.00 2.00 0.00 0.000 431.50 0.00 2.50 0.00 0.000 431.50 0.00 3.00 0.00 0.000 431.50 0.00 3.50 0.00 0.000 431.50 0.00 4.00 0.00 0.000 431.50 0.00 4.50 0.00 0.000 431.50 0.00 5.00 0.00 0.000 431.50 0.00 5.50 0.00 0.000 431.50 0.00 6.00 0.00 0.000 431.50 0.00 6.50 0.00 0.000 431.50 0.00 7.00 0.00 0.000 431.50 0.00 7.50 0.00 0.000 431.50 0.00 8.00 0.00 0.000 431.50 0.00 8.50 0.00 0.000 431.52 0.00 9.00 0.01 0.000 431.55 0.01 9.50 0.01 0.000 431.56 0.01 10.00 0.02 0.000 431.58 0.02 10.50 0.04 0.000 431.60 0.03 11.00 0.06 0.000 431.64 0.06 11.50 0.13 0.001 431.70 0.12 12.00 2.62 0.020 433.40 1.42 12.50 0.24 0.002 431.90 0.39 13.00 0.15 0.001 431.73 0.16 13.50 0.12 0.001 431.70 0.12 14.00 0.09 0.001 431.68 0.09 14.50 0.08 0.001 431.66 0.08 15.00 0.07 0.001 431.66 0.07 15.50 0:06 0.000 431.65 0.07 16.00 0.06 0.000 431.64 0.06 16.50 0.05 0.000 431.63 0.05 17.00 0.05 0.000 431.63 0.05 17.50 0.05 0.000 431.62 0.05 18.00 0.04 0.000 431.62 0.04 18.50 0.04 0.000 431.61 0.04 19.00 0.04 0.000 431.61 0.04 19.50 0.04 0.000 431.61 0.04 20.00 0.03 0.000 431.60 0.03 20.50 0.03 0.000 431.60 0.03 21.00 0.03 0.000 431.60 0.03 21.50 0.03 0.000 431.60 0.03 22.00 0.03 0.000 431.60 0.03 22.50 0.03 0.000 431.60 0.03 23.00 0.03 0.000 431.59 0.03 23.50 0.03 0.000 431.59 0.03 24.00 0.03 0.000 431.59 0.03 Post -South Type// 24 -hr 2 -Year Rainfall = 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 22 Elevation Primary (feet) (cfs) 431.50 0.00 431.55 0.01 431.60 0.03 431.65 0.07 431.70 0.12 431.75 0.18 431.80 0.24 431.85 0.32 431.90 0.39 431.95 0.47 432.00 0.54 432.05 0.59 432.10 0.64 432.15 0.68 432.20 0.73 432.25 0.77 432.30 0.81 432.35 0.84 432.40 0.88 432.45 0.91 432.50 0.95 432.55 0.98 432.60 1.01 432.65 1.04 432.70 1.07 432.75 1.10 432.80 1.13 432.85 1.15 432.90 1.18 432.95 1.20 433.00 1.23 433.05 1.25 433.10 1.28 433.15 1.30 433.20 1.33 433.25 1.35 433.30 1.37 433.35 1.39 433.40 1.42 433.45 1.44 433.50 1.46 433.55 1.49 433.60 1.53 433.65 1.59 433.70 1.65 433.75 1.73 433.80 1.81 433.85 1.90 433.90 1.98 433.95 2.06 434.00 2.13 434.05 2.19 Stage- Discharge for Pond 3P: Pipe Storage South Elevation Primary (feet) (cfs) 434.10 2.25 434.15 2.31 434.20 2.36 434.25 2.42 434.30 2.47 434.35 2.51 434.40 2.56 434.45 2.61 434.50 2.65 434.55 2.70 434.60 2.74 434.65 2.78 434.70 2.82 434.75 2.86 434.80 2.90 434.85 2.94 434.90 2.98 434.95 3.01 435.00 3.05 435.05 3.09 435.10 3.12 435.15 3.16 435.20 3.19 435.25 3.23 435.30 3.26 435.35 3.29 435.40 3.33 435.45 3.36 435.50 3.39 435.55 3.57 435.60 3.87 435.65 4.25 435.70 4.69 435.75 5.19 435.80 5.73 435.85 6.32 435.90 6.95 435.95 7.63 436.00 8.33 436.05 9.07 436.10 9.85 436.15 10.65 436.20 11.49 436.25 12.00 436.30 12.07 436.35 12.15 436.40 12.22 436.45 12.29 436.50 12.36 Post -South Type// 24 -hr 2 -Year Rainfall = 3.66" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 23 Stage -Area- Storage for Pond 3P: Pipe Storage South Elevation Storage (feet) (acre -feet) 431.50 0.000 431.55 0.000 431.60 0.000 431.65 0.000 431.70 0.001 431.75 0.001 431.80 0.001 431.85 0.002 431.90 0.002 431.95 0.003 432.00 0.003 432.05 0.003 432.10 0.004 432.15 0.004 432.20 0.005 432.25 0.005 432.30 0.006 432.35 0.006 432.40 0.007 432.45 0.007 432.50 0.008 432.55 0.009 432.60 0.009 432.65 0.010 432.70 0.010 432.75 0.011 432.80 0.012 432.85 0.012 432.90 0.013 432.95 0.014 433.00 0.014 433.05 0.015 433.10 0.016 433.15 0.016 433.20 0.017 433.25 0.018 433.30 0.018 433.35 0.019 433.40 0.020 433.45 0.020 433.50 0.021 433.55 0.022 433.60 0.022 433.65 0.023 433.70 0.024 433.75 0.025 433.80 0.025 433.85 0.026 433.90 0.027 433.95 0.027 434.00 0.028 434.05 0.029 Elevation Storage (feet) (acre -feet) 434.10 0.030 434.15 0.030 434.20 0.031 434.25 0.032 434.30 0.032 434.35 0.033 434.40 0.034 434.45 0.035 434.50 0.035 434.55 0.036 434.60 0.037 434.65 0.037 434.70 0.038 434.75 0.039 434.80 0.039 434.85 0.040 434.90 0.041 434.95 0.041 435.00 0.042 435.05 0.043 435.10 0.043 435.15 0.044 435.20 0.045 435.25 0.045 435.30 0.046 435.35 0.047 435.40 0.047 435.45 0.048 435.50 0.048 435.55 0.049 435.60 0.049 435.65 0.050 435.70 0.051 435.75 0.051 435.80 0.052 435.85 0.052 435.90 0.053 435.95 0.053 436.00 0.053 436.05 0.054 436.10 0.054 436.15 0.055 436.20 0.055 436.25 0.055 436.30 0.056 436.35 0.056 436.40 0.056 436.45 0.056 436.50 0.056 Post -South Type 1124 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page 24 Time span =0.00 -24.00 hrs, dt =0.01 hrs, 2401 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 1S: Post - Developed Area to Runoff Area =0.790 ac 58.23% Impervious Runoff Depth >3.65" Tc =6.0 min CN =83 Runoff =5.01 cfs 0.240 of Pond 3P: Pipe Storage South Peak Elev= 435.08' Storage =0.043 of Inflow =5.01 cfs 0.240 of Outflow =3.11 cfs 0.240 of Total Runoff Area = 0.790 ac Runoff Volume = 0.240 of Average Runoff Depth = 3.65" 41.77% Pervious = 0.330 ac 58.23% Impervious = 0.460 ac Post -South Type 11 24 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 25 Summary for Subcatchment 1 S: Post - Developed Area to South Runoff = 5.01 cfs @ 11.97 hrs, Volume= 0.240 af, Depth> 3.65" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 10 -Year Rainfall = 5.53" Area (ac) CN Description 0.460 98 Paved parking, HSG B 0.330 61 >75% Grass cover, Good, HSG B 0.790 83 Weighted Average 0.330 41.77% Pervious Area 0.460 58.23% Impervious Area Tc Length Slope Velocity Capacity Description (min) feet ft/ft ft/sec cfs 6.0 Direct Entry, 5 .I 3 3 0 LL 2 1 Subcatchment 1S: Post - Developed Area to South Hydrograph Type II 24 -hr 10 -Year Rainfall = 5.53" Runoff Area =0.790 ac Runoff Volume =0.240 of Runoff Depth >3.65" Tc =6.0 min CN =83 0 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) ■ Runoff Post -South Type // 24 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Pa a 26 Hydrograph for Subcatchment IS: Post - Developed Area to South Time Precip. Excess Runoff (hours) inches inches rfs 0.00 0.00 0.00 0.00 0.50 0.03 0.00 0.00 1.00 0.06 0.00 0.00 1.50 0.09 0.00 0.00 2.00 0.12 0.00 0.00 2.50 0.16 0.00 0.00 3.00 0.19 0.00 0.00 3.50 0.23 0.00 0.00 4.00 0.27 0.00 0.00 4.50 0.31 0.00 0.00 5.00 0.35 0.00 0.00 5.50 0.39 0.00 0.00 6.00 0.44 0.00 0.00 6.50 0.49 0.00 0.01 7.00 0.55 0.01 0.01 7.50 0.60 0.02 0.01 8.00 0.66 0.03 0.02 8.50 0.73 0.04 0.03 9.00 0.81 0.07 0.04 9.50 0.90 0.10 0.05 10.00 1.00 0.13 0.07 10.50 1.13 0.19 0.10 11.00 1.30 0.27 0.15 11.50 1.56 0.42 0.28 12.00 3.67 2.00 4.64 12.50 4.06 2.34 0.41 13.00 4.27 2.52 0.25 13.50 4.42 2.65 0.19 14.00 4.53 2.76 0.15 14.50 4.63 2.84 0.13 15.00 4.72 2.92 0.12 15.50 4.80 2.99 0.11 16.00 4.87 3.05 0.09 16.50 4.93 3.11 0.09 17.00 4.99 3.16 0.08 17.50 5.04 3.21 0.08 18.00 5.09 3.26 0.07 18.50 5.14 3.30 0.07 19.00 5.19 3.34 0.06 19.50 5.23 3.38 0.06 20.00 5.26 3.41 0.05 20.50 5.30 3.45 0.05 21.00 5.34 3.48 0.05 21.50 5.37 3.51 0.05 22.00 5.40 3.54 0.05 22.50 5.44 3.57 0.05 23.00 5.47 3.60 0.05 23.50 5.50 3.63 0.05 24.00 5.53 3.66 0.04 Post -South Type// 24 -hr 10 -Year Rainfall= 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 HvdroCAD Software Solutions LLC Page 27 Summary for Pond 3P: Pipe Storage South Inflow Area = 0.790 ac, 58.23% Impervious, Inflow Depth > 3.65" for 10 -Year event Inflow = 5.01 cfs @ 11.97 hrs, Volume= 0.240 of Outflow = 3.11 cfs @ 12.04 hrs, Volume= 0.240 af, Atten= 38 %, Lag= 4.4 min Primary = 3.11 cfs @ 12.04 hrs, Volume= 0.240 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Peak Elev= 435.08' @ 12.04 hrs Surf.Area= 0.013 ac Storage= 0.043 of Plug -Flow detention time= 6.9 min calculated for 0.240 of (100% of inflow) Center -of -Mass det. time= 6.0 min ( 811.4 - 805.5 ) Volume Invert Avail.Storaae Storage Descriotion #1 431.50' 0.056 of 60.0" Round Pipe Storage L= 125.0' Device Routing Invert Outlet Devices #1 Primary 431.50' 15.0" Round Culvert L= 50.0' Ke= 0.500 Inlet/ Outlet Invert= 431.50'/ 431.00' S=0.0100'/' Cc= 0.900 n= 0.013, Flow Area= 1.23 sf #2 Device 1 431.50' 6.5" Vert. Orifice /Grate C= 0.600 #3 Device 1 433.50' 6.0" Vert. Orifice /Grate C= 0.600 #4 Device 1 435.50' Custom Weir /Orifice, Cv= 2.62 (C= 3.28) Head (feet) 335.50 336.50 Width (feet) 4.00 4.00 Primary OutFlow Max =3.11 cfs @ 12.04 hrs HW= 435.08' (Free Discharge) Z--1 = Culvert (Passes 3.11 cfs of 10.15 cfs potential flow) 2 Orifice /Grate (Orifice Controls 2.02 cfs @ 8.76 fps) 3= Orifice /Grate (Orifice Controls 1.09 cfs @ 5.55 fps) 4_Custom Weir /Orifice ( Controls 0.00 cfs) Post -South Type 11 24 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 28 Pond 3P: Pipe Storage South Hydrograph 5 H v 3 3 0 LL 2 1 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) Pond 3P: Pipe Storage South Stage- Discharge 436 435 G w w o 434 �o d w 433 432 0 1 2 3 4 5 6 7 8 9 10 11 12 Discharge (cfs) Inflow Primary Primary Post -South Type 11 24 -hr 10 -Year Rainfall= 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 29 436 435 a� m w 0 434 m W 433 432 Pond 3P: Pipe Storage South Stage- Area - Storage Pipe Stor*ge. 0.005 0.01 0.015 0.02 0.025 0.03 0.035 0.04 0.045 0.05 0.055 Storage (acre-feet) CJ Siarage Post -South Type // 24 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page 30 Hydrograph for Pond 3P: Pipe Storage South Time Inflow Storage Elevation Primary hours ) (cfs) (acre -feet (feet) {cfs 0.00 0.00 0.000 431.50 0.00 0.50 0.00 0.000 431.50 0.00 1.00 0.00 0.000 431.50 0.00 1.50 0.00 0.000 431.50 0.00 2.00 0.00 0.000 431.50 0.00 2.50 0.00 0.000 431.50 0.00 3.00 0.00 0.000 431.50 0.00 3.50 0.00 0.000 431.50 0.00 4.00 0.00 0.000 431.50 0.00 4.50 0.00 0.000 431.50 0.00 5.00 0.00 0.000 431.50 0.00 5.50 0.00 0.000 431.50 0.00 6.00 0.00 0.000 431.51 0.00 6.50 0.01 0.000 431.53 0.00 7.00 0.01 0.000 431.55 0.01 7.50 0.01 0.000 431.56 0.01 8.00 0.02 0.000 431.57 0.02 8.50 0.03 0.000 431.59 0.03 9.00 0.04 0.000 431.61 0.04 9.50 0.05 0.000 431.62 0.05 10.00 0.07 0.000 431.64 0.06 10.50 0.10 0.001 431.67 0.09 11.00 0.15 0.001 431.72 0.14 11.50 0.28 0.001 431.81 0.26 12.00 4.64 0.040 434.84 2.93 12.50 0.41 0.008 432.48 0.94 13.00 0.25 0.001 431.82 0.27 13.50 0.19 0.001 431.77 0.20 14.00 0.15 0.001 431.73 0.16 14.50 0.13 0.001 431.72 0.14 15.00 0.12 0.001 431.70 0.12 15.50 0.11 0.001 431.69 0.11 16.00 0.09 0.001 431.68 0.10 16.50 0.09 0.001 431.67 0.09 17.00 0.08 0.001 431.66 0.08 17.50 0.08 0.001 431.66 0.08 18.00 0.07 0.001 431.65 0.07 18.50 0.07 0.000 431.65 0.07 19.00 0.06 0.000 431.64 0.06 19.50 0.06 0.000 431.64 0.06 20.00 0.05 0.000 431.63 0.05 20.50 0.05 0.000 431.63 0.05 21.00 0.05 0.000 431.63 0.05 21.50 0.05 0.000 431.62 0.05 22.00 0.05 0.000 431.62 0.05 22.50 0.05 0.000 431.62 0.05 23.00 0.05 0.000 431.62 0.05 23.50 0.05 0.000 431.62 0.05 24.00 0.04 0.000 431.62 0.04 Post -South Type 11 24 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page 31 Elevation Primary (feet) (cfs) 431.50 0.00 431.55 0.01 431.60 0.03 431.65 0.07 431.70 0.12 431.75 0.18 431.80 0.24 431.85 0.32 431.90 0.39 431.95 0.47 432.00 0.54 432.05 0.59 432.10 0.64 432.15 0.68 432.20 0.73 432.25 0.77 432.30 0.81 432.35 0.84 432.40 0.88 432.45 0.91 432.50 0.95 432.55 0.98 432.60 1.01 432.65 1.04 432.70 1.07 432.75 1.10 432.80 1.13 432.85 1.15 432.90 1.18 432.95 1.20 433.00 1.23 433.05 1.25 433.10 1.28 433.15 1.30 433.20 1.33 433.25 1.35 433.30 1.37 433.35 1.39 433.40 1.42 433.45 1.44 433.50 1.46 433.55 1.49 433.60 1.53 433.65 1.59 433.70 1.65 433.75 1.73 433.80 1.81 433.85 1.90 433.90 1.98 433.95 2.06 434.00 2.13 434.05 2.19 Stage- Discharge for Pond 3P: Pipe Storage South Elevation Primary (feet) (cfs) 434.10 2.25 434.15 2.31 434.20 2.36 434.25 2.42 434.30 2.47 434.35 2.51 434.40 2.56 434.45 2.61 434.50 2.65 434.55 2.70 434.60 2.74 434.65 2.78 434.70 2.82 434.75 2.86 434.80 2.90 434.85 2.94 434.90 2.98 434.95 3.01 435.00 3.05 435.05 3.09 435.10 3.12 435.15 3.16 435.20 3.19 435.25 3.23 435.30 3.26 435.35 3.29 435.40 3.33 435.45 3.36 435.50 3.39 435.55 3.57 435.60 3.87 435.65 4.25 435.70 4.69 435.75 5.19 435.80 5.73 435.85 6.32 435.90 6.95 435.95 7.63 436.00 8.33 436.05 9.07 436.10 9.85 436.15 10.65 436.20 11.49 436.25 12.00 436.30 12.07 436.35 12.15 436.40 12.22 436.45 12.29 436.50 12.36 Post -South Type 11 24 -hr 10 -Year Rainfall = 5.53" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 32 Stage -Area- Storage for Pond 3P: Pipe Storage South Elevation Storage (feet) (acre -feet) 431.50 0.000 431.55 0.000 431.60 0.000 431.65 0.000 431.70 0.001 431.75 0.001 431.80 0.001 431.85 0.002 431.90 0.002 431.95 0.003 432.00 0.003 432.05 0.003 432.10 0.004 432.15 0.004 432.20 0.005 432.25 0.005 432.30 0.006 432.35 0.006 432.40 0.007 432.45 0.007 432.50 0.008 432.55 0.009 432.60 0.009 432.65 0.010 432.70 0.010 432.75 0.011 432.80 0.012 432.85 0.012 432.90 0.013 432.95 0.014 433.00 0.014 433.05 0.015 433.10 0.016 433.15 0.016 433.20 0.017 433.25 0.018 433.30 0.018 433.35 0.019 433.40 0.020 433.45 0.020 433.50 0.021 433.55 0.022 433.60 0.022 433.65 0.023 433.70 0.024 433.75 0.025 433.80 0.025 433.85 0.026 433.90 0.027 433.95 0.027 434.00 0.028 434.05 0.029 Elevation Storage (feet) (acre -feet) 434.10 0.030 434.15 0.030 434.20 0.031 434.25 0.032 434.30 0.032 434.35 0.033 434.40 0.034 434.45 0.035 434.50 0.035 434.55 0.036 434.60 0.037 434.65 0.037 434.70 0.038 434.75 0.039 434.80 0.039 434.85 0.040 434.90 0.041 434.95 0.041 435.00 0.042 435.05 0.043 435.10 0.043 435.15 0.044 435.20 0.045 435.25 0.045 435.30 0.046 435.35 0.047 435.40 0.047 435.45 0.048 435.50 0.048 435.55 0.049 435.60 0.049 435.65 0.050 435.70 0.051 435.75 0.051 435.80 0.052 435.85 0.052 435.90 0.053 435.95 0.053 436.00 0.053 436.05 0.054 436.10 0.054 436.15 0.055 436.20 0.055 436.25 0.055 436.30 0.056 436.35 0.056 436.40 0.056 436.45 0.056 436.50 0.056 Post -South Type 11 24 -hr 100 -Year Rainfall= 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 33 Time span =0.00 -24.00 hrs, dt =0.01 hrs, 2401 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 1S: Post - Developed Area to Runoff Area =0.790 ac 58.23% Impervious Runoff Depth >7.01" Tc =6.0 min CN =83 Runoff =9.23 cfs 0.461 of Pond 3P: Pipe Storage South Peak Elev= 436.06' Storage =0.054 of Inflow =9.23 cfs 0.461 of Outflow =9.20 cfs 0.461 of Total Runoff Area = 0.790 ac Runoff Volume = 0.461 of Average Runoff Depth = 7.01" 41.77% Pervious = 0.330 ac 58.23% Impervious = 0.460 ac Post -South Type 1124 -hr 100 -Year Rainfall = 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 HvdroCAD® 10.00 s/n 06538 @2013 HvdroCAD Software Solutions LLC Pace 34 Summary for Subcatchment 1 S: Post - Developed Area to South Runoff = 9.23 cfs @ 11.97 hrs, Volume= 0.461 af, Depth> 7.01" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 100 -Year Rainfall= 9.08" Area (ac) CN Description 0.460 98 Paved parking, HSG B 0.330 61 >75% Grass cover, Good, HSG B 0.790 83 Weighted Average 0.330 41.77% Pervious Area 0.460 58.23% Impervious Area Tc Length Slope Velocity Capacity Description min feet (ft/ft) ft/sec) (cfs) 6.0 Direct Entry, 10 9 8 7 3 5 0 LL 4 3 2 1 Subcatchment 1S: Post - Developed Area to South Hydrograph Type 1124 -h r 100 -Year Rainfall= 9.08" Runoff Area =0.790 ac Runoff Volume =0.461 of Runoff Depth >7.01" Tc =6.0 min CN =83 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) Runoff Post -South Type 11 24 -hr 100 -Year Rainfall = 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 HvdroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 35 Hydrograph for Subcatchment 1 S: Post - Developed Area to South Time Precip. Excess Runoff (hours) inches (inches) cfs 0.00 0.00 0.00 0.00 0.50 0.05 0.00 0.00 1.00 0.10 0.00 0.00 1.50 0.15 0.00 0.00 2.00 0.20 0.00 0.00 2.50 0.26 0.00 0.00 3.00 0.31 0.00 0.00 3.50 0.37 0.00 0.00 4.00 0.44 0.00 0.00 4.50 0.50 0.00 0.01 5.00 0.57 0.01 0.01 5.50 0.65 0.02 0.02 6.00 0.73 0.04 0.03 6.50 0.81 0.07 0.04 7.00 0.90 0.09 0.05 7.50 0.99 0.13 0.06 8.00 1.09 0.17 0.07 8.50 1.20 0.22 0.09 9.00 1.33 0.29 0.12 9.50 1.48 0.37 0.13 10.00 1.64 0.46 0.17 10.50 1.85 0.60 0.23 11.00 2.13 0.79 0.34 11.50 2.57 1.11 0.60 12.00 6.02 4.11 8.48 12.50 6.67 4.72 0.73 13.00 7.01 5.04 0.45 13.50 7.25 5.27 0.34 14.00 7.45 5.45 0.27 14.50 7.61 5.60 0.23 15.00 7.75 5.74 0.21 15.50 7.88 5.86 0.19 16.00 7.99 5.97 0.16 16.50 8.09 6.07 0.15 17.00 8.19 6.16 0.14 17.50 8.28 6.24 0.13 18.00 8.36 6.32 0.13 18.50 8.44 6.40 0.12 19.00 8.51 6.47 0.11 19.50 8.58 6.53 0.10 20.00 8.64 6.59 0.09 20.50 8.70 6.65 0.09 21.00 8.76 6.71 0.09 21.50 8.82 6.76 0.09 22.00 8.87 6.81 0.08 22.50 8.93 6.86 0.08 23.00 8.98 6.92 0.08 23.50 9.03 6.96 0.08 24.00 9.08 7.01 0.08 Post -South Type ll 24 -hr 100 -Year Rainfall = 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 36 Summary for Pond 3P: Pipe Storage South Inflow Area = 0.790 ac, 58.23% Impervious, Inflow Depth > 7.01" for 100 -Year event Inflow = 9.23 cfs @ 11.97 hrs, Volume= 0.461 of Outflow = 9.20 cfs @ 11.98 hrs, Volume= 0.461 af, Atten= 0 %, Lag= 0.4 min Primary = 9.20 cfs @ 11.98 hrs, Volume= 0.461 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Peak Elev= 436.06' @ 11.98 hrs Surf.Area= 0.008 ac Storage= 0.054 of Plug -Flow detention time= 6.1 min calculated for 0.460 of (100% of inflow) Center -of -Mass det. time= 5.3 min ( 792.5 - 787.2 ) Volume Invert Avail.Stora a Storage Description #1 431.50' 0.056 of 60.0" Round Pipe Storage L= 125.0' Device Routing Invert Outlet Devices #1 Primary 431.50' 15.0" Round Culvert L= 50.0' Ke= 0.500 Inlet/ Outlet Invert= 431.50'/431.00' S=0.0100'/' Cc= 0.900 n= 0.013, Flow Area= 1.23 sf #2 Device 1 431.50' 6.5" Vert. Orifice /Grate C= 0.600 #3 Device 1 433.50' 6.0" Vert. Orifice /Grate C= 0.600 #4 Device 1 435.50' Custom Weir /Orifice, Cv= 2.62 (C= 3.28) Head (feet) 335.50 336.50 Width (feet) 4.00 4.00 Primary OutFlow Max =9.18 cfs @ 11.98 hrs HW= 436.06' (Free Discharge) t--1= Culvert (Passes 9.18 cfs of 11.72 cfs potential flow) 2= Orifice /Grate (Orifice Controls 2.30 cfs @ 9.97 fps) 3= Orifice /Grate (Orifice Controls 1.44 cfs @ 7.31 fps) 4= Custom Weir /Orifice (Weir Controls 5.45 cfs @ 2.44 fps) Post -South Type // 24 -hr 100 -Year Rainfall= 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 37 Pond 3P: Pipe Storage South Hydrograph N w V O LL 9 it 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 3P: Pipe Storage South Stage- Discharge 1436 435 m v o 434 �o d w 433 432 weirlOrifice Orifice /Grate Culvert * 06ficelGra ;e 0 1 2 3 4 5 6 7 8 9 10 11 12 Discharge (cfs) [Inflow Primary ■ Primary Post -South Type 11 24 -hr 100 -Year Rainfall = 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 HvdroCAD® 10.00 s/n 06538 @2013 HvdroCAD Software Solutions LLC Page 38 436 435 m d C 434 �a m w 433 432 Pond 3P: Pipe Storage South Stage- Area - Storage Pipe 5tamo, 0 0.005 0.01 0.015 0.02 0.025 0.03 0.035 0.04 0.045 0.05 0.055 Storage (acre -feet) ■ Storage Post -South Type 11 24 -hr 100 -Year Rainfall= 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 39 Hydrograph for Pond 3P: Pipe Storage South Time Inflow Storage Elevation Primary (hours) (cfs) (acre -feet) (feet) (cfs) 0.00 0.00 0.000 431.50 0.00 0.50 0.00 0.000 431.50 0.00 1.00 0.00 0.000 431.50 0.00 1.50 0.00 0.000 431.50 0.00 2.00 0.00 0.000 431.50 0.00 2.50 0.00 0.000 431.50 0.00 3.00 0.00 0.000 431.50 0.00 3.50 0.00 0.000 431.50 0.00 4.00 0.00 0.000 431.50 0.00 4.50 0.01 0.000 431.54 0.01 5.00 0.01 0.000 431.56 0.01 5.50 0.02 0.000 431.58 0.02 6.00 0.03 0.000 431.60 0.03 6.50 0.04 0.000 431.61 0.04 7.00 0.05 0.000 431.62 0.05 7.50 0.06 0.000 431.63 0.06 8.00 0.07 0.000 431.65 0.07 8.50 0.09 0.001 431.67 0.09 9.00 0.12 0.001 431.69 0.11 9.50 0.13 0.001 431.71 0.13 10.00 0.17 0.001 431.74 0.16 10.50 0.23 0.001 431.79 0.22 11.00 0.34 0.002 431.86 0.33 11.50 0.60 0.003 432.02 0.55 12.00 8.48 0.054 436.03 8.74 12.50 0.73 0.016 433.16 1.31 13.00 0.45 0.003 431.99 0.52 13.50 0.34 0.002 431.87 0.35 14.00 0.27 0.002 431.82 0.27 14.50 0.23 0.001 431.80 0.24 15.00 0.21 0.001 431.78 0.21 15.50 0.19 0.001 431.76 0.19 16.00 0.16 0.001 431.74 0.17 16.50 0.15 0.001 431.73 0.15 17.00 0.14 0.001 431.72 0.14 17.50 0.13 0.001 431.72 0.14 18.00 0.13 0.001 431.71 0.13 18.50 0.12 0.001 431.70 0.12 19.00 0.11 0.001 431.69 0.11 19.50 0.10 0.001 431.68 0.10 20.00 0.09 0.001 431.67 0.09 20.50 0.09 0.001 431.67 0.09 21.00 0.09 0.001 431.67 0.09 21.50 0.09 0.001 431.67 0.09 22.00 0.08 0.001 431.67 0.08 22.50 0.08 0.001 431.66 0.08 23.00 0.08 0.001 431.66 0.08 23.50 0.08 0.001 431.66 0.08 24.00 0.08 0.001 431.66 0.08 Post -South Type 11 24 -hr 100 -Year Rainfall= 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 40 Elevation Primary (feet) (cfs) 431.50 0.00 431.55 0.01 431.60 0.03 431.65 0.07 431.70 0.12 431.75 0.18 431.80 0.24 431.85 0.32 431.90 0.39 431.95 0.47 432.00 0.54 432.05 0.59 432.10 0.64 432.15 0.68 432.20 0.73 432.25 0.77 432.30 0.81 432.35 0.84 432.40 0.88 432.45 0.91 432.50 0.95 432.55 0.98 432.60 1.01 432.65 1.04 432.70 1.07 432.75 1.10 432.80 1.13 432.85 1.15 432.90 1.18 432.95 1.20 433.00 1.23 433.05 1.25 433.10 1.28 433.15 1.30 433.20 1.33 433.25 1.35 433.30 1.37 433.35 1.39 433.40 1.42 433.45 1.44 433.50 1.46 433.55 1.49 433.60 1.53 433.65 1.59 433.70 1.65 433.75 1.73 433.80 1.81 433.85 1.90 433.90 1.98 433.95 2.06 434.00 2.13 434.05 2.19 Stage- Discharge for Pond 3P: Pipe Storage South Elevation Primary (feet) (cfs) 434.10 2.25 434.15 2.31 434.20 2.36 434.25 2.42 434.30 2.47 434.35 2.51 434.40 2.56 434.45 2.61 434.50 2.65 434.55 2.70 434.60 2.74 434.65 2.78 434.70 2.82 434.75 2.86 434.80 2.90 434.85 2.94 434.90 2.98 434.95 3.01 435.00 3.05 435.05 3.09 435.10 3.12 435.15 3.16 435.20 3.19 435.25 3.23 435.30 3.26 435.35 3.29 435.40 3.33 435.45 3.36 435.50 3.39 435.55 3.57 435.60 3.87 435.65 4.25 435.70 4.69 435.75 5.19 435.80 5.73 435.85 6.32 435.90 6.95 435.95 7.63 436.00 8.33 436.05 9.07 436.10 9.85 436.15 10.65 436.20 11.49 436.25 12.00 436.30 12.07 436.35 12.15 436.40 12.22 436.45 12.29 436.50 12.36 Post -South Type // 24 -hr 100 -Year Rainfall = 9.08" Prepared by TG- MOSYSCON Printed 11/18/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 41 Stage -Area- Storage for Pond 3P: Pipe Storage South Elevation Storage (feet) (acre -feet) 431.50 0.000 431.55 0.000 431.60 0.000 431.65 0.000 431.70 0.001 431.75 0.001 431.80 0.001 431.85 0.002 431.90 0.002 431.95 0.003 432.00 0.003 432.05 0.003 432.10 0.004 432.15 0.004 432.20 0.005 432.25 0.005 432.30 0.006 432.35 0.006 432.40 0.007 432.45 0.007 432.50 0.008 432.55 0.009 432.60 0.009 432.65 0.010 432.70 0.010 432.75 0.011 432.80 0.012 432.85 0.012 432.90 0.013 432.95 0.014 433.00 0.014 433.05 0.015 433.10 0.016 433.15 0.016 433.20 0.017 433.25 0.018 433.30 0.018 433.35 0.019 433.40 0.020 433.45 0.020 433.50 0.021 433.55 0.022 433.60 0.022 433.65 0.023 433.70 0.024 433.75 0.025 433.80 0.025 433.85 0.026 433.90 0.027 433.95 0.027 434.00 0.028 434.05 0.029 Elevation Storage (feet) (acre -feet) 434.10 0.030 434.15 0.030 434.20 0.031 434.25 0.032 434.30 0.032 434.35 0.033 434.40 0.034 434.45 0.035 434.50 0.035 434.55 0.036 434.60 0.037 434.65 0.037 434.70 0.038 434.75 0.039 434.80 0.039 434.85 0.040 434.90 0.041 434.95 0.041 435.00 0.042 435.05 0.043 435.10 0.043 435.15 0.044 435.20 0.045 435.25 0.045 435.30 0.046 435.35 0.047 435.40 0.047 435.45 0.048 435.50 0.048 435.55 0.049 435.60 0.049 435.65 0.050 435.70 0.051 435.75 0.051 435.80 0.052 435.85 0.052 435.90 0.053 435.95 0.053 436.00 0.053 436.05 0.054 436.10 0.054 436.15 0.055 436.20 0.055 436.25 0.055 436.30 0.056 436.35 0.056 436.40 0.056 436.45 0.056 436.50 0.056 _Minis Runoff Reduction Method ReDevelopment Workshot To be used w/ 2011 BMP Standards and Specifications Pre- Development Treatment Volume (cubic ifoel f 53t iPre- Development Load (TP) (lb /yr) 0 & 'Adjusted Land Cover Summary reflects the pre redevelopment ,land cover minus the pervious land cover(roresUopen space or imanaged turf) acreage proposed for new impervious cover The adjusted total acreage is consistent with the Post Redevelopment acreage (minus the acreage of new impervious cover) The load reduction requriement for the new impervious cover to meet the ne development load limit is computed in Column I. f � armattan T- i T no 2014 !litrnpen EhiG 036 073 An 6.104 0.00 U.OS Total 1,30 Okay Okay Okav Adjusted' Land Cowr 0 Land Cover S urrrrr+nry Past- RaOavvlopmvnt How Imparvroua 066 :I:+,i npuE cells Area (acres) rai : .i;oHan ado constant values Post-Re Dove lopment Plroject &Land Cover l unstams 0-52 Ammei Rainfall (mchos) -'argot Rainfall Evont (inH+aa) PhpaPhorue 6MC (mtR 0 2e Target f hosphorus Target Load (Ib /acre /yr) 0.0285 Pj 0.1ih Pnr- Ftegonlio nt Lead Cover acne .1249 Post- Development Treatmen Volume JcuWr feel Asolle ForeaUOPm Space [acres) — uslveyed, 018 Protoclpd fomsuepan "CO, or refogo". ed land Managed Turf (scros)— disturbed, r yards or other turf to be mowed /managed Maximum %Reduction Required 8n Prn•Ratlsvalo and 1 -.col Impervious Cover (acres) _ Peal- ReDatrel Inent Land Cover aama A solfa Forest/Open Space (acres) — undisturbed, 018 protected forestlopen space or reforested and Managed turf (acres) — disturbed, graded for yards or other turf to be mowed /managed f I mpervious Cover tacres) _ Area Check Okav Rv CoaMclsnla A sail s Foresuo Space 0.02 Managed Turf 0.15 Im mvloua Cevar 9.95 I -and Cover Summary _ Listed Pre- Development Treatment Volume (cubic ifoel f 53t iPre- Development Load (TP) (lb /yr) 0 & 'Adjusted Land Cover Summary reflects the pre redevelopment ,land cover minus the pervious land cover(roresUopen space or imanaged turf) acreage proposed for new impervious cover The adjusted total acreage is consistent with the Post Redevelopment acreage (minus the acreage of new impervious cover) The load reduction requriement for the new impervious cover to meet the ne development load limit is computed in Column I. f � armattan T- i T no 2014 !litrnpen EhiG 036 073 An 6.104 0.00 U.OS Total 1,30 Okay Okay Okav Adjusted' Land Cowr 0 Land Cover S urrrrr+nry Past- RaOavvlopmvnt How Imparvroua 066 Area (acres) 0.60 Total New Dsv. Site Ares acres 0.52 PM- Silo Rv 0-52 Hew Day. Slle Ri ]7&5 Post - ReDevelopment Treatment Volume •(acre -ft 0.0285 Post - Development Treatmen Volume acre -ft 247 Post - ReDevelopmenl Treatment Volume cubicfoef .1249 Post- Development Treatmen Volume JcuWr feel 078 ReDevelopmenl Load t7P) (ltifyr) 018 Post- Development Load (TP) (lblyr Maximum %Reduction Required 8n Prn•Ratlsvalo and 1 -.col 2dh TP Load Reduction Required for Ra dsvel d Area l r 018 TP Load Reduction Required for New Impervious Area (lblyr) Total Load Reduction Required Ib/ r 9.39 n9a 15' iPAI r y x d d 1i 8 8 E R 8 8 8 R 8 8 8 8 R 8 8 S R 8 8 8, 8 S R � gg6 S 2 g s • g� €�a o P ❑ eo P d I � a a x�G a C 5 v I C a a a s a xd E e A K S to � j c� �• a �u � a � $ � $ ■ W G � E_ d 2 E_ 3 t N W p 2 K J{ Q s y v b 3 m D d 8 i a ❑ a a a o a I I' � ❑ o o o o❑ o o n ❑ k I RR= gE' z @►� 4 wjS a -pS J xso � 8 8 v ❑ ��u u v od �� s � A 8 9 u w 9FiC i d 3 EE 8 $ E E 8 w § \§K\ k , 7 § §j w 4 ) 0 4 %a$ 0 4 r @! §S u k 3 0 5494 ■ 4 j 0 §§ \\ f )\ § § 9§ § � « 4 ) 6 LUaao0 ;- -a8 § —t Z>. « 8L�53 §i 5 � §q ? LLJ LIJ }�� j \ L} \ � LU o } _ u / L9 �o ) )\ )/ 2 f 2 § § =) § 2 © IL ) a k $ a ) & S ■ w IL � 2 2 g z g o S § § ■ E § > 2 E o § § \ 2 q @ 2 m § § 2 ) \ § \ ( _ / � k § L ] ; a o ` [ � E 7 Virginia Runoff Reduction Method Worksheet Virginia Runoff Reduction Method ReDevelopment Worksheet - v2.8 - June 2014 Site Data Summary Total Rainfall = 43 inches Site Land Cover Summary A Soils 1 B Soils ) C Soils I D Soils 1 Total i % of Total Forest(acres) 0.00 0.00 0.00 0.00 0.00 0.00 Turf (acres) 0.001 0.38 0.001 0.00 0.38 27.94 Impervious (acres) 1 0.001 0.981 0.001 0.001 0.981 72.06 i 1.361 100.001 Site Rv 0.74 Post Development Treatment Volume (ft') 3655 Post Development TP Load (lb /yr) 2.30 Post Development TN Load (lb /yr) 16.43 Total TP Load Reduction Required (lb /yr) 1.39 Total Runoff Volume Reduction (ft') 128 Total TP Load Reduction Achieved (lb /yr) 0 Total TN Load Reduction Achieved (lb /yr) 0.92 Adjusted Post Development TP Load (Ib /yr) 2.19 Remaining Phosphorous Load Reduction (Lb/ye) Required 1,27 Drainage Area Summary Drainage Area Compliance Summary D.A. A I D.A. B I D.A. C I D.A. D D.A. E Total iForest (acres) 0.00 0.001 0.001 0.001 0.00 0.00 Turf (acres) 0.10 0.001 0.001 0.001 0.00 0.10 Impervious (acres) 0.071 0.001 0.001 0.001 0.00 0.07 0.17 Drainage Area Compliance Summary Summary Print D.A. A I D.A. B i D.A. C I D.A. D I D.A. E I Total TP Load Red. (lb /yr) 1 0.111 0.001 0.001 0.001 0.001 0.11 'TN Load Red. (lb /yr) 1 0.921 0.001 0.001 0,001 0.001 0.92 Summary Print Virginia Runoff Reduction Method Worksheet Drainage Area A Summary Land Cover Summary BMP Selections i 0.17) (Practice A Soils I B Soils I C Soils I D Soils I Total I % of Total Forest (acres) O.Ool 0.001 0.001 0.001 0.00 0.00 'Turf (acres) 0.001 0.101 0.001 0.001 0.101 58.76 Impervious (acres) 0.001 0.071 0.001 0.001 0.071 41.24 BMP Selections i 0.17) (Practice Credit Area (acres) Downstream Practice 6.a. Bioretention #1 or Urban Bioretention (Spec #9) Impervious: 0.0716 Total TN Load Reduction Achieved in D.A. A (lb/yr) Turf (Pervious): 0.102 Total Impervtous Cover Treated (acres) 0.07 Total Turf Area Treated (acres) 0.10 Total TP Load Reduction Achieved in D.A. A (ibiyr) 0.11 Total TN Load Reduction Achieved in D.A. A (lb/yr) 0.92 Summary Print Virginia Runoff Reduction Method Worksheet Channel and Flood Protection Summary Print Weighted CN 1 -year storm Adjusted CN 2- yearstorm Adjusted CN 10 -year storm Adjusted CN Target Rainfall Event (in) 3.04 3.68 5.57 D.A. A CN 76 72 73 74 D.A.B CN 01 #N /A I #N /A I #N /A D.A.0 CN 0 #N /A #N /A #N /A D.A.D CN 0 #N /A #N /A #N /A D.A.E CN 01 #N /A #N /A #N /A Summary Print CmImNmll Chesapeake Bay Nutrient LandTrust, LLC. August 20, 2015 John Wilson Timmons Group 919 2nd Street S.E. Charlottesville, VA 22902 RE: CBNLT/Wildwood Farm — Nutrient Credit Availability Chesapeake Bay Nutrient Land Trust, LLC Project Reference: Branchlands - Whistler House Attention: Mr. Wilson "Tomorrow's Natural Resources Today" This letter is to confirm the availability of authorized Nutrient Credits sufficient to meet your project requirements at our Wildwood Farm facility, which is registered with the Virginia Department of Environmental Quality (DEQ). These Nutrient Credits are generated and managed under the terms of the Wildwood Farm Nutrient Reduction Implementation Plan dated May 16, 2008 which was authorized by the Virginia Department of Environmental Quality (DEQ) and the Virginia Department of Conservation and Recreation (DCR) on August 25, 2008. The Wildwood Farm project has been authorized to provide Nutrient Credits for use in the James River watershed. These Credits are transferable to those entities regulated under DEQ's Stormwater Management Program in accordance with VA Code § 62.1- 44.15:35. Currently our Wildwood Farm facility has 43.20 pounds of Phosphorus Credits available. If we can provide further assistance please feel free to contact our office. Sincerely, Chesapeake Bay Nutrient Land Trust, LLC By Its Manager EarthSource Solutions, Inc. cawy J. Je wee v Casey J. Jensen Sr. Project Manager / GIS Analyst Chesapeake Bay Nutrient Land Trust, LLC. • 5736 S. Laburnum Avenue • Richmond, VA 23231 • P: 804.222.5114 • www.cbnit.com