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Stormwater Calculations West Courts1 S -P 1 S -E Proposed New West Existing rass Play Tenni Court A ea 1L 1P Total Runoff Filtratio i Swale 2L Total Runoff to Existing Pond Subcat Reach Pon Link Drainage Diagram for MMW FILT SWALE WEST COURTS 11 -17 -10 Prepared by Inspec, Printed 12/3/2010 HydroCADO 9.00 s/n 06027 © 2009 HydroCAD Software Solutions LLC MMW FILT SWALE WEST COURTS 11 -17 -10 Prepared by Inspec Printed 12/3/2010 HydroCADO 9.00 s/n 06027 © 2009 HydroCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment- numbers) 0.170 74 >75% Grass cover, Good, HSG C (1S -E) 0.170 98 Proposed North Drive Loop (1S -P) 0.340 TOTAL AREA MMW FILT SWALE WEST COURTS 11 -17 -10 Prepared by Inspec Printed 12/3/2010 HydroCAD® 9.00 s/n 06027 02009 HydroCAD Software Solutions LLC Pates Soil Listing (all nodes) Area Soil Subcatchment (acres) Goup Numbers 0.000 HSG A 0.000 HSG B 0.170 HSG C 1 S -E 0.000 HSG D 0.170 Other 1 S -P 0.340 TOTAL AREA MMW FILT SWALE WEST COURTS 11 -17 -10 Prepared by Inspec Printed 12/3/2010 HydroCADO 9.00 s/n 06027 © 2009 HydroCAD Software Solutions LLC Page 4 Pipe Listing (all nodes) Line# Node In- Invert Out - Invert Length Slope n Diam/Width Height Number (feet) (feet) (fee (ft/ft) (inches) (inches) 1 1 P 1,046.50 1,046.00 30.0 0.0167 0.010 12.0 0.0 MMW FILT SWALE WEST COURTS 11 -17 -10 Type 1124 -hr 1 year Rainfall = 2.30" Prepared by Inspec Printed 12/3/2010 HydroCADO 9.00 s/n 06027 © 2009 HydroCAD Software Solutions LLC Page 5 Time span =0.00 -72.00 hrs, dt =0.01 hrs, 7201 points Runoff by SCS TR -20 method, UH =SCS Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 1S -E: Existing Grass Play Runoff Area =0.170 ac 0.00% Impervious Runoff Depth = 0.50" Flow Length =300' Slope= 0.0150'/' Tc =30.0 min CN =74 Runoff =0.06 cfs 0.007 of Subcatchment 1S -P: Proposed New West Runoff Area =0.170 ac 100.00% Impervious Runoff Depth= 2.07" Flow Length =300' Slope= 0.0150 '/' Tc =3.7 min CN =98 Runoff =0.59 cfs 0.029 of Pond 1 P: Filtration Swale Peak Elev= 1,050.48' Storage =0.014 of Inflow =0.59 cfs 0.029 of Discarded =0.03 cfs 0.029 of Primary =0.00 cfs 0.000 of Outflow =0.03 cfs 0.029 of Link 1 L: Total Runoff Inflow =0.06 cfs 0.007 of Primary =0.06 cfs 0.007 of Link 2L: Total Runoff to Existing Pond Inflow =0.00 cfs 0.000 of Primary =0.00 cfs 0.000 of Total Runoff Area = 0.340 ac Runoff Volume = 0.036 of Average Runoff Depth = 1.29" 50.00% Pervious = 0.170 ac 50.00% Impervious = 0.170 ac MMW FILT SWALE WEST COURTS 11 -17 -10 Type 1124 -hr 1 year Rainfall = 2.30" Prepared by Inspec Printed 12/3/2010 HydroCADO 9.00 s/n 06027 © 2009 HydroCAD Software Solutions LLC Page 6 Summary for Subcatchment 1S -E: Existing Grass Play Area Runoff = 0.06 cfs @ 12.30 hrs, Volume= 0.007 af, Depth= 0.50" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -72.00 hrs, dt= 0.01 hrs Type II 24 -hr 1 year Rainfall= 2.30" Area (ac) CN Description 0.170 74 >75% Grass cover, Good, HSG C 0.170 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 30.0 300 0.0150 0.17 Sheet Flow, Existing grass play field Grass: Short n=0.150 P2=2.50" Subcatchment 1S -E: Existing Grass Play Area Hydrograph 0.065- - 0.06 cfs — Runoff 0.06 _ 0.055- 1124 -hr 1 year 0.05- Rainfall= 2.30 0.045- Runoff Area =0.170 ac 0.04 Runoff Volume =0.007 of N 0.035_ - Runoff Depth =0.50" LL 0.03 Flow Length =300' 0.025_ - -- Slope= 0.0150 T 0.02- Tc =30.0 min 0.015- 0.01- - _ CN =74 0.005- 0- 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 77772 44 46 48 " 53 11 5 7 7 1 7 1 57 1- 5 7 7 77 11- 62 11 67 - 0 62 64 66 68 70 72 Time (hours) MMW FILT SWALE WEST COURTS 11 -17 -10 Type 1124 -hr 1 year Rainfall= 2.30" Prepared by Inspec Printed 12/3/2010 HydroCADO 9.00 s/n 06027 © 2009 HydroCAD Software Solutions LLC Page 7 Summary for Subcatchment 1 S -P: Proposed New West Tennis Court Runoff = 0.59 cfs @ 11.94 hrs, Volume= 0.029 af, Depth= 2.07" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -72.00 hrs, dt= 0.01 hrs Type II 24 -hr 1 year Rainfall= 2.30" Area (ac) CN Description 0.170 98 Proposed North Drive Loop 0.170 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.7 300 0.0150 1.35 Sheet Flow, Minnetonka HS Smooth surfaces n= 0.011 P2= 2.50" 0.4: o.Z N 0.3'. LL 3 0.2: 0. 1 0.1r 0.1 Subcatchment 1S-P: Proposed New West Tennis Court Hydrograph 0.59 cfs - — Runoff Type II 24 -hr 1 year Rainfall = 2.30 Runoff Area =0.170 ac Runoff Volume =0.029 of Runoff Depth= 2.07" Flow Length =300' Slope= 0.0150 T Tc =3.7 min CN =98 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours) MMW Fl LT SWALE WEST COURTS 11 -17 -10 Type 1124 -hr 1 year Rainfall = 2.30" Prepared by Inspec Printed 12/3/2010 HydroCADO 9.00 s/n 06027 © 2009 HydroCAD Software Solutions LLC Page 8 Summary for Pond 1 P: Filtration Swale Inflow Area = 0.170 ac,100.00% Impervious, Inflow Depth = 2.07" for 1 year event Inflow = 0.59 cfs @ 11.94 hrs, Volume= 0.029 of Outflow = 0.03 cfs @ 12.56 hrs, Volume= 0.029 af, Atten= 94 %, Lag= 37.0 min Discarded = 0.03 cfs @ 12.56 hrs, Volume= 0.029 of Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 of Routing by Stor -Ind method, Time Span= 0.00 -72.00 hrs, dt= 0.01 hrs Peak Elev= 1,050.48' @ 12.56 hrs Surf.Area= 0.043 ac Storage= 0.014 of Plug -Flow detention time= 169.2 min calculated for 0.029 of (100% of inflow) Center -of -Mass det. time= 169.2 min ( 927.3 - 758.0 ) Volume Invert Avail.Storage Storage Description #1 1,050.00' 0.044 of Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre -feet) (acre -feet) 1,050.00 0.014 0.000 0.000 1,051.00 0.074 0.044 0.044 Device Routing Invert Outlet Devices #1 Primary 1,046.50' 12.0" Round Culvert L= 30.0' RCP, mitered to conform to fill, Ke= 0.700 Outlet Invert= 1,046.00' S=0.0167'/' Cc= 0.900 n= 0.010 PVC, smooth interior #2 Device 1 1,050.90' 24.0" Vert. Orifice /Grate C= 0.600 #3 Discarded 1,050.00' 0.800 in /hr Exfiltration over Horizontal area from 1,049.00'- 1,050.90' Conductivity to Groundwater Elevation = 0.00' Excluded Horizontal area = 0.000 ac Phase -In= 0.01' Discarded OutFlow Max =0.03 cfs @ 12.56 hrs HW= 1,050.48' (Free Discharge) L3= Exfiltration ( Controls 0.03 cfs) Z Primary OutFlow Max =0.00 cfs @ 0.00 hrs HW= 1,050.00' (Free Discharge) =Culvert (Passes 0.00 cfs of 5.78 cfs potential flow) L2= Orifice /Grate ( Controls 0.00 cfs) MMW FILT SWALE WEST COURTS 11-17-10 Type// 24-hr 1 year Rainfall=2.30" Prepared by Inspec Printed 12/3/2010 HydroCAD09.00 s/n06O27 02009 HydroCAD Software Solutions LLC Page 9 Pond 1 P: Filtration Swale Hydrograph 0.59 111 Inflow 0.6. T F F Outflow Discarded :-:D 0.55 Primary Inflow Area=0.170 ac 0.5- - . - Peak Elev=l 050.48' 0.45 - - - - ;- -, - -;- 0.4 Storage=0.01,4 af _t 0.35- 1 7 r 7 - T - r - r 7 0 7 - I - I - I - 11 - 7 - 1 - 7 7 - 0.3- 7 - - 1 - I - r - [L 0.25 0.2- - - - - - - - 1 i - t - 1-- -1 0.15 - - I- -+ - - +- 005 0.03 cfs 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours) MMW FILT SWALE WEST COURTS 11 -17 -10 Type 1124 -hr 1 year Rainfall = 2.30" Prepared by Inspec Printed 12/3/2010 HydroCADO 9.00 s/n 06027 @ 2009 HydroCAD Software Solutions LLC Page 10 Summary for Link 1 L: Total Runoff Inflow Area = 0.170 ac, 0.00% Impervious, Inflow Depth= 0.50" for 1 year event Inflow = 0.06 cfs @ 12.30 hrs, Volume= 0.007 of Primary = 0.06 cfs @ 12.30 hrs, Volume= 0.007 af, Atten= 0 %, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00 -72.00 hrs, dt= 0.01 hrs Link 1L: Total Runoff Hydrograph — Inflw Primary N U 3 0 LL 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours) MMW FILT SWALE WEST COURTS 11 -17 -10 Type 1124 -hr 1 year Rainfall= 2.30" Prepared by Inspec Printed 12/3/2010 HydroCAD® 9.00 s/n 06027 02009 HydroCAD Software Solutions LLC Page 11 Summary for Link 2L: Total Runoff to Existing Pond Inflow Area = 0.170 ac,100.00% Impervious, Inflow Depth = 0.00" for 1 year event Inflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 of Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 0 %, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00 -72.00 hrs, dt= 0.01 hrs Y1 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours) Link 2L: Total Runoff to Existing Pond Hydrograph 1 I I I I I I I I 1 ! I I f I I I I I I 1 I I I I 1 1 I I I I I I I ' I ' : Inflow Area -0.170 ac I I I 1 I I I I I I I I 1 I I I 1 I I I I I I I I 1 I 1 I I 1 I I I I 1 I I I I I I I I I 1 1 I I I I I 1 I I I I 1 I I I 1 I I I I I 1 I I I 1 I 1 1 i I I I 1 I 1 I I I 1 I I I 1 I 1 I I I I 1 1 I I I I I 1 I I I I 1 1 1 I I 1 I I I 1 I I ( I I 1 I I I I I I I I I 1 I I I I I I I 1 I I I I I I I I 1 1 1 I I I I I 1 1 I I 1 I I I I I 1 I I 1 I I I I I I I I I I 1 I I 1 I I I I I I I I I I 1 I I 1 I I 1 I I I I I I I I 1 I I I I I I 1 I I 1 I I I I I I I I I I I I I I 1 I I I I I 1 I I I I I I I I I I 1 I I I 1 1 I I I I I I I I 1 1 I I I I I I 1 1 I I I I I I I I 1 I 1 1 I I I I I I I I I I 1 I 1 I I I I I I I I I I I I 1 I I I 1 I 1 I I 1 I I t I I I 1 1 I I I I 1 I I I I I I I I I I I I I 1 1 1 I I I 1 I E I 1 I I 1 1 I I 1 I I I 1 I I I I I I I 1 I I 1 1 I I I I I I I I 1 I I i i I I I 1 I I I I I I I I I I I I I I I I 1 I I 1 i i I I I I I I I I I I I I 1 I 1 I 1 I 1 1 1 I I I I I I I I I I 1 I 1 I 1 I I 1 I I I I I I I I I I I 1 I I I I I I I I I I I I 1 1 I I I 1 I I I 1 I t I 1 I I 1 I I I 1 I I I I i 1 I I 1 I I I I 1 I 1 I I 1 I I I I I t 4 1 1 I 1 I I I 1 I I I I 1 I I I I 1 1 I I I I I I I 1 1 I I I I 1 I I I I 1 I I 1 1 I I I 1 I I I I I I I I I I I I I I I 1 1 I I t I I I I I I I I I I I I I 1 I I 1 i I I I I I I I 1 I I I I k I 1 I I 1 I I I 1 1 I I I I I 0.00 cfs F --1 nf10w Primary MMW FILT SWALE WEST COURTS 11 -17 -10 Type 1124 -hr 10 year Rainfall= 4.10" Prepared by Inspec Printed 12/3/2010 HydroCAD® 9.00 s/n 06027 02009 HydroCAD Software Solutions LLC Page 12 Time span =0.00 -72.00 hrs, dt =0.01 hrs, 7201 points Runoff by SCS TR -20 method, UH =SCS Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 1S -E: Existing Grass Play Runoff Area =0.170 ac 0.00% Impervious Runoff Depth= 1.67" Flow Length =300' Slope= 0.0150'/' Tc =30.0 min CN =74 Runoff =0.24 cfs 0.024 of Subcatchment 1S -P: Proposed New West Runoff Area =0.170 ac 100.00% Impervious Runoff Depth= 3.86" Flow Length =300' Slope= 0.01507' Tc =3.7 min CN =98 Runoff =1.06 cfs 0.055 of Pond 1 P: Filtration Swale Peak Elev= 1,050.76' Storage =0.028 of Inflow =1.06 cfs 0.055 of Discarded =0.05 cfs 0.055 of Primary =0.00 cfs 0.000 of Outflow =0.05 cfs 0.055 of Link 1 L: Total Runoff Inflow =0.24 cfs 0.024 of Primary =0.24 cfs 0.024 of Link 2L: Total Runoff to Existing Pond Inflow =0.00 cfs 0.000 of Primary =0.00 cfs 0.000 of Total Runoff Area = 0.340 ac Runoff Volume = 0.078 of Average Runoff Depth = 2.77" 50.00% Pervious = 0.170 ac 50.00% Impervious= 0.170 ac MMW FILT SWALE WEST COURTS 11 -17 -10 Type 1124 -hr 10 year Rainfall= 4.10" Prepared by Inspec Printed 12/3/2010 HydroCAD® 9.00 s/n 06027 @2009 HydroCAD Software Solutions LLC Page 13 Summary for Subcatchment 1 S -E: Existing Grass Play Area Runoff = 0.24 cfs @ 12.24 hrs, Volume= 0.024 af, Depth= 1.67" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -72.00 hrs, dt= 0.01 hrs Type II 24 -hr 10 year Rainfall= 4.10" Area (ac) CN Description 0.170 74 >75% Grass cover, Good, HSG C 0.170 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 30.0 300 0.0150 0.17 Sheet Flow, Existing grass play field Grass: Short n=0.150 P2=2.50" Subcatchment 1S -E: Existing Grass Play Area Hydrograph 0.26 0.25 0.24 cfs — Runoff 0.24 0.23- 0.22 Type II 24-hr 10 year 0.21- 0.2 0.19° 0.18 Runoff Area= 0.170 ac 0.17- °.16_ Runoff Volume =0.024 of y 0.15- 3 0.i3 Runoff Depth =1.67" LL 012 Flow Length =300' 0.1 Slope= 0.0150 '/' °.os, 0.08 0.07 Tc =30.0 min 0.06 0.05 - _ CN =74 0.04 0.03 0.02 0.01 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 Z 50 52 54 56 58 60 62 64 6668 70 72 Time (hours) MMW FILT SWALE WEST COURTS 11 -17 -10 Type 1124 -hr 10 year Rainfall=4. 10 " Prepared by Inspec Printed 12/3/2010 HydroCAD® 9.00 s/n 06027 © 2009 HydroCAD Software Solutions LLC Page 14 Summary for Subcatchment 1 S -P: Proposed New West Tennis Court Runoff = 1.06 cfs @ 11.94 hrs, Volume= 0.055 af, Depth= 3.86" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -72.00 hrs, dt= 0.01 hrs Type II 24 -hr 10 year Rainfall= 4.10" Area (ac) CN Description 0.170 98 Proposed North Drive Loop 0.170 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.7 300 0.0150 1.35 Sheet Flow, Minnetonka HS Smooth surfaces n= 0.011 P2= 2.50" Subcatchment 1 S -P: Proposed New West Tennis Court Hydrograph N U 3 0 Type II 24 -hr 10 year Rainfall= 4.10" Runoff Area =0.170 ac Runoff Volume =0.055 of Runoff Depth= 3.86" Flow Length =300' Slope= 0.0150 '/' Tc =3.7 min CN =98 — Runoff 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours) MMW Fl LT SWALE WEST COURTS 11 -17 -10 Type 1124 -hr 10 year Rainfall=4. 10 " Prepared by Inspec Printed 12/3/2010 HydroCAD® 9.00 s/n 06027 02009 HydroCAD Software Solutions LLC Page 15 Summary for Pond 1 P: Filtration Swale Inflow Area = 0.170 ac,100.00% Impervious, Inflow Depth = 3.86" for 10 year event Inflow = 1.06 cfs @ 11.94 hrs, Volume= 0.055 of Outflow = 0.05 cfs @ 12.91 hrs, Volume= 0.055 af, Atten= 95 %, Lag= 58.3 min Discarded = 0.05 cfs @ 12.91 hrs, Volume= 0.055 of Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 of Routing by Stor -Ind method, Time Span= 0.00 -72.00 hrs, dt= 0.01 hrs Peak Elev= 1,050.76' @ 12.91 hrs Surf.Area= 0.059 ac Storage= 0.028 of Plug -Flow detention time= 266.4 min calculated for 0.055 of (100% of inflow) Center -of -Mass det. time= 266.4 min ( 1,011.7 - 745.4 ) Volume Invert Avail.Storage Storage Description #1 1,050.00' 0.044 of Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre -feet) (acre -feet) 1,050.00 0.014 0.000 0.000 1,051.00 0.074 0.044 0.044 Device Routina Invert Outlet Devices #1 Primary 1,046.50' 12.0" Round Culvert L= 30.0' RCP, mitered to conform to fill, Ke= 0.700 Outlet Invert= 1,046.00' S=0.0167'/' Cc= 0.900 n= 0.010 PVC, smooth interior #2 Device 1 1,050.90' 24.0" Vert. Orifice /Grate C= 0.600 #3 Discarded 1,050.00' 0.800 in /hr Exfiltration over Horizontal area from 1,049.00'- 1,050.90' Conductivity to Groundwater Elevation = 0.00' Excluded Horizontal area = 0.000 ac Phase -In= 0.01' Discarded OutFlow Max =0.05 cfs @ 12.91 hrs HW= 1,050.76' (Free Discharge) L3= Exfiltration ( Controls 0.05 cfs) Primary OutFlow Max =0.00 cfs @ 0.00 hrs HW= 1,050.00' (Free Discharge) 't--1 =Culvert (Passes 0.00 cfs of 5.78 cfs potential flow) L2= Orifice /Grate ( Controls 0.00 cfs) MMW FILT SWALE WEST COURTS 11 -17 -10 Type 1124 -hr 10 year Rainfall=4. 10 " Prepared by Inspec Printed 12/3/2010 HydroCADO 9.00 s/n 06027 © 2009 HydroCAD Software Solutions LLC Page 16 Pond 1 P: Filtration Swale Hydrograph — Inflow — Outflow — Discarded — Primary y U 3 0 LL 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours) MMW FILT SWALE WEST COURTS 11 -17 -10 Type 1124 -hr 10 year Rainfall = 4.10" Prepared by Inspec Printed 12/3/2010 HydroCADO 9.00 s/n 06027 @ 2009 HydroCAD Software Solutions LLC Page 17 Summary for Link 1 L: Total Runoff Inflow Area = 0.170 ac, 0.00% Impervious, Inflow Depth = 1.67" for 10 year event Inflow = 0.24 cfs @ 12.24 hrs, Volume= 0.024 of Primary = 0.24 cfs @ 12.24 hrs, Volume= 0.024 af, Atten= 0 %, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00 -72.00 hrs, dt= 0.01 hrs Link 1 L: Total Runoff Time (hours) Hydrograph 0.26 0.25 i r r- - 1- 1 i 1 I 1 I i I I I _ _ _ _ _ - - -- 0.24 cfs - -- - -- - -- - -- - - -- - - - - - -- , i I I I I I I I t i i I I I I I I I I I I i I _ -- Inflow 0.24 r - -- I i - + - *- - - - I_ , - - - Primary 0.23 ------ -' - -;- - =- --- '--=--- 1 ---- '---- ' - -' - -' Inflow Area 0.22 - r - r - - -1- - -r-r-r- r---r-,--i-y-t- =0.170 ac 0.21 -- 1-- '-- ' - -1 -- i- 1- 1- i-- '---- I-- '-- 1- i - - 0.2 -�---- -1- -�- - *- - F- '-- 1-- - -�-�- --- +- +-�-�-�-----I-�- - - - - +-�-- I 0.19 ----- - - - - -- 1 I I I I - - - i - --- I-- '-- '- -1 - -i- - - -' - -I -� -1 - -1- - ------------------ i 0 .18 " ' ! , , _ - _ _ _ _.. _ F - I' - - - I . -I . - - - i "" 0 17 _ 1 _ _'_ _ ____ I I - ---- ------------- - --- -- -- - - - - -° -- - - - - -- .... _ _ _ .I - � � i I I I I I I i - i I I I I i I I 0.16 - - - -1 - - + - + -�- - --- 1 - - - - 1- - --- + - + -� - - -- -I - -I- - - + -+ -4-- -1- -I- 0.15 -- , 1 - -, - - -- ;-,_ 1 i , I _..----- - - - - -- - - -- - - - - - - - - - - - --- - - - -- I I 1 1 i -,�- - L... - -- - �- -, - i -- I i i i- . i ... I tl 0.14 - - F- -1- - i - -1 - -I - + - +- '- 1- - !- - '- - I -1- _I - - 'I - I - + ' - I - -4 - 4 3 0.13 I -- -- ,, - - - - ' -j- 1 I I i 1 -- r ----- , ------ - - - -- -- i i - � I � -� -,- I 1 I I I I i i i O LL 0.12 - 1- -1-- 4- .,-- + - I - I - } - - i 0.11 - I - ,- - - -t- - - - I - - i - - - i - j - j - j - - ,- - ,- - I -, - - - -' -- 0.1 - - I - -1 _ -1- - - -1 - - 4 - 1 - -F - + - � - - - i - - I - -1- - -1 - 4 - i - F - } - 1- - I 0.09 ._ !._ ..I - - _ -.. _ I I I I I I I I 1 I I I I I I I i I I ... .., .. .,. �..... � ... L ....., _. _ I _ _ 1 _. _. ....-, _ -I ..... .... - r -- - j -- I F ,- !'- - F T -- r - r -- F -- , -- 0.08 - 0.07 r - r - ,- - ,- - I' - 0.06 - ~ -1- -1- _ I - - - - , - 4- - I - !- - I- -I- -1- -1- -1 - - -4 - 4 - + - � - 1- - ~ - ~ - i- -I- -1- I - 4 - - 0.05 i - r - r - r - 1 - - 1 - 1 1 1 i I 1 1 1 i i t 1 - r - r - r - - - -- 1 -- 1 -- ? r r r r r ; r - 1 - 1 - - - r - r - r - I 0.04 1_ 1 _L_L_I- - 1__i__i_J_ - _J_ -4 _1_1_L_L_ 0.03 1 1 I -- 1 -- , - - - - I 1 1 i i I I 1 i i 1 1 1 I 1 I - -; - - 1 -- , -- i --- 7 - 7 - i - T --- r - 1 -- ; -- 1 -- i -- i - - - - - 0.02 1-- 1 _I._ _..I _ L- _ _:_ _ I_.....I_ _I ....._i -..., _ .l - -i - 1 ._..4. _ I_ _ L_ _ 1_ _..I- -I- ....1 -.. _.1 .... _, ._ _1 __ __ __ __ 0.01 -- 1 ---- - - - - 1 1 I -- 7 _,-- - - - --- - -' -- - -�. - - r - I"' - - :.. - - 1 -. " "-I ,- i F 0 0 2 4 6 8 10 12 14 1618 20 2224 26 2830 32 3436 38 40 4244 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours) MMW FILT SWALE WEST COURTS 11 -17 -10 Type 1124 -hr 10 year Rainfall = 4.10" Prepared by Inspec Printed 12/3/2010 HydroCADO 9.00 s/n 06027 © 2009 HydroCAD Software Solutions LLC Page 18 Summary for Link 2L: Total Runoff to Existing Pond Inflow Area = 0.170 ac,100.00% Impervious, Inflow Depth = 0.00" for 10 year event Inflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 of Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 0 %, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00 -72.00 hrs, dt= 0.01 hrs Link 2L: Total Runoff to Existing Pond Hydrograph F --1 nflow Primary y U 3 0 LL 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours) MMW FILT SWALE WEST COURTS 11 -17 -10 Type 1124 -hr 100 year Rainfall = 5.90" Prepared by Inspec Printed 12/3/2010 HydroCAD® 9.00 s/n 06027 © 2009 HydroCAD Software Solutions LLC Page 19 Time span =0.00 -72.00 hrs, dt =0.01 hrs, 7201 points Runoff by SCS TR -20 method, UH =SCS Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 1S -E: Existing Grass Play Runoff Area =0.170 ac 0.00% Impervious Runoff Depth= 3.10" Flow Length =300' Slope= 0.0150 '/' Tc =30.0 min CN =74 Runoff =0.46 cfs 0.044 of Subcatchment 1S -P: Proposed New West Runoff Area =0.170 ac 100.00% Impervious Runoff Depth = 5.66" Flow Length =300' Slope= 0.0150 '/' Tc =3.7 min CN =98 Runoff =1.54 cfs 0.080 of Pond 1 P: Filtration Swale Peak Elev= 1,050.97' Storage =0.042 of Inflow =1.54 cfs 0.080 of Discarded =0.05 cfs 0.076 of Primary =0.03 cfs 0.004 of Outflow =0.09 cfs 0.080 of Link 1 L: Total Runoff Inflow =0.46 cfs 0.044 of Primary =0.46 cfs 0.044 of Link 2L: Total Runoff to Existing Pond Inflow =0.03 cfs 0.004 of Primary =0.03 cfs 0.004 of Total Runoff Area = 0.340 ac Runoff Volume = 0.124 of Average Runoff Depth = 4.38" 50.00% Pervious = 0.170 ac 50.00% Impervious = 0.170 ac MMW FILT SWALE WEST COURTS 11 -17 -10 Type 1124 -hr 100 year Rainfall = 5.90" Prepared by Inspec Printed 12/3/2010 HydroCAD® 9.00 s/n 06027 02009 HydroCAD Software Solutions LLC Page 20 Summary for Subcatchment 1 S -E: Existing Grass Play Area Runoff = 0.46 cfs @ 12.24 hrs, Volume= 0.044 af, Depth= 3.10" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -72.00 hrs, dt= 0.01 hrs Type II 24 -hr 100 year Rainfall = 5.90" Area (ac) CN Description 0.170 74 >75% Grass cover, Good, HSG C 0.170 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 30.0 300 0.0150 0.17 Sheet Flow, Existing grass play field Grass: Short n=0.150 P2=2.50" Subcatchment 1S-E: Existing Grass Play Area Hydrograph 0.48= - 0.46 cfs -- L - - -'- _ -' _ __ - -- -' - -' - -' - -' - -- I I i I I I I I I I I I I I I I I I 1 I I I 1 I I I 0.46_ -'r-r-t--r-r- 0.44_ 0.42- �- '- i - = - -L - '-- '-- '-- '- - ' - - - - - -+ -' -r -r- -� -� ; -; - -; - -- Type II 24 -hr 100 year 0.4 - I I I I I - -- ,------ -, - ,-- - -, - Rainfall= 5.90" 0.38 I I- �- _- -- �- �- ' - -I - -' - 0.36 - 1 r r r - - I - r Runoff Area 0.34 _J_1_1_L_L_L_L -L _I _I___ =0.170 ac- - 1 I I I 1 I I I I I I 1 0.32 0.3 -- - 1- t- r- r -r -r -r - I - -: ----- - - - - -- - ; - -- Runoff Volume =0.044 of w 0.28_ 0.26- . 1 - - 1 - - r-r - r Runoff Depth= 3.10" T r r-I 0 0.24 - - J _ J _ L _ L _ L _ L _ L _ L _ 1_ _ I_ - 1 ! _ _ LL 0.22 I I I Flow Length =300' - I - - --I - r - I - - I - r r r r r r - I-- I 0.2- ' - ' - i-=--- ]- '-- I-- '-- I-- I-- '- -' - -I- - 0.18= I I I I I 1 I - - - r--- 1-- ,---- ,-- I-- , - -I -1- - Slope= 0.0150 '/' - 0.16 - I I V I I I I I I I _ -,- ; -; -; -; -, —� - ,-- I -- ;-- ; -- ,- -� - - ;- � -- 0.14 J -.J._. _.a._ L_L_ 1- ._I -_ -_I- _I___I__1__I__I_J_�_1_. t Tc =30.0 min 0.12_ - - r r - r - r I - r - r - I - 1 - 1 -- -�- -- -T .I. - - - -� -� - 1- -'---- '-- '-- ' - -I -_- I - =- I -1- - - - -- CN =74 0.08 0.06 0.04 _ -�- -- I- - - -I -- -I - -I- - - - + - + -t - -�- L - - - - -- 0.02- I I I I I I I 1 I 1 I I - -- r-- ----------- - -,.._ - - 7 T -- - 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours) — Runoff MMW FILT SWALE WEST COURTS 11 -17 -10 Type 1124 -hr 100 year Rainfall = 5.90" Prepared by Inspec Printed 12/3/2010 HydroCAD® 9.00 s/n 06027 @2009 HydroCAD Software Solutions LLC Pa, ec e 21 Summary for Subcatchment 1S -P: Proposed New West Tennis Court Runoff = 1.54 cfs @ 11.94 hrs, Volume= 0.080 af, Depth= 5.66" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -72.00 hrs, dt= 0.01 hrs Type II 24 -hr 100 year Rainfall = 5.90" Area (ac) CN Description 0.170 98 Proposed North Drive Loop 0.170 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.7 300 0.0150 1.35 Sheet Flow, Minnetonka HS Smooth surfaces n= 0.011 P2= 2.50" Subcatchment 1 S -P: Proposed New West Tennis Court Hydrograph N U 3 0 1.54 cfs Type 11 24 -hr 100 year Rainfall =5.90 Runoff Area =0.170 ac Runoff Volume =0.080 of Runoff Depth = 5.66" Flow Length =300' Slope= 0.0150 '/' Tc =3.7 min CN =98 — Runoff J 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours) MMW FILT SWALE WEST COURTS 11 -17 -10 Type 1124 -hr 100 year Rainfall = 5.90" Prepared by Inspec Printed 12/3/2010 HydroCAD® 9.00 s/n 06027 © 2009 HydroCAD Software Solutions LLC Page 22 Summary for Pond 1 P: Filtration Swale Inflow Area = 0.170 ac,100.00% Impervious, Inflow Depth = 5.66" for 100 year event Inflow = 1.54 cfs @ 11.94 hrs, Volume= 0.080 of Outflow = 0.09 cfs @ 12.61 hrs, Volume= 0.080 af, Atten= 94 %, Lag= 39.8 min Discarded = 0.05 cfs @ 12.61 hrs, Volume= 0.076 of Primary = 0.03 cfs @ 12.61 hrs, Volume= 0.004 of Routing by Stor -Ind method, Time Span= 0.00 -72.00 hrs, dt= 0.01 hrs Peak Elev= 1,050.97' @ 12.61 hrs Surf.Area= 0.072 ac Storage= 0.042 of Plug -Flow detention time= 320.6 min calculated for 0.080 of (100% of inflow) Center -of -Mass det. time= 320.6 min ( 1,059.7 - 739.1 ) Volume Invert Avail.Storage Storage Description #1 1,050.00' 0.044 of Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre -feet) (acre -feet) 1,050.00 0.014 0.000 0.000 1,051.00 0.074 0.044 0.044 Device Routing Invert Outlet Devices #1 Primary 1,046.50' 12.0" Round Culvert L= 30.0' RCP, mitered to conform to fill, Ke= 0.700 Outlet Invert= 1,046.00' S=0.0167'/' Cc= 0.900 n= 0.010 PVC, smooth interior #2 Device 1 1,050.90' 24.0" Vert. Orifice /Grate C= 0.600 #3 Discarded 1,050.00' 0.800 in /hr Exfiltration over Horizontal area from 1,049.00'- 1,050.90' Conductivity to Groundwater Elevation = 0.00' Excluded Horizontal area = 0.000 ac Phase -In= 0.01' Discarded OutFlow Max =0.05 cfs @ 12.61 hrs HW= 1,050.97' (Free Discharge) L3= Exfiltration ( Controls 0.05 cfs) Primary OutFlow Max =0.03 cfs @ 12.61 hrs HW= 1,050.97' (Free Discharge) t--1 =Culvert (Passes 0.03 cfs of 6.65 cfs potential flow) L2= Orifice /Grate (Orifice Controls 0.03 cfs @ 0.89 fps) MMW FILT SWALE WEST COURTS 11 -17 -10 Type 1124 -hr 100 year Rainfall = 5.90" Prepared by Inspec Printed 12/3/2010 HydroCAD® 9.00 s/n 06027 02009 HydroCAD Software Solutions LLC Page 23 Pond 1 P: Filtration Swale Hydrograph Inflow Area =0.170 ac Peak EIev= 1,050.97' Storage =0.042 of N U 3 O — Inflow — Outflow — Discarded —Primary 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours) MMW Fl LT SWALE WEST COURTS 11 -17 -10 Type 1124 -hr 100 year Rainfall = 5.90" Prepared by Inspec Printed 12/3/2010 HydroCAD@ 9.00 s/n 06027 02009 HydroCAD Software Solutions LLC Page 24 Summary for Link 1 L: Total Runoff Inflow Area = 0.170 ac, 0.00% Impervious, Inflow Depth = 3.10" for 100 year event Inflow = 0.46 cfs @ 12.24 hrs, Volume= 0.044 of Primary = 0.46 cfs @ 12.24 hrs, Volume= 0.044 af, Atten= 0 %, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00 -72.00 hrs, dt= 0.01 hrs Link 1 L: Total Runoff Hydrograph 0.5 _ L L J 0.46 cfs - - -1 I _ 0.46 - . -1 - r - r -i - -'- I - - r -_ - r 7 - — Primary 0.44- 0.42= I I I I i I _ _ - _ _ - _ - - - - - r- - ;--- -, - -,- -,- Inflow Area -0 - t - + =r- .170 ac 0.4 0.38 _ _ L_ }._ _I -_1_ _ _ +_ +_a._ -' -- 0.36 - '.. I .. ... ..1 ' - 1 " - i - � ,.I ...I - - i - - i --. - i _.;'r' 7._1 "I - i... I I .. I .. T .... ...I1 r - I_. . 0.34- - - _ 1 _ 1 .. 1 .- L - L _ I_ .._ I_ _ I_ _I _ _I _ _I _ 1 _ I 0.32 y 1 -r -r- - r- 1 1 - I - - I - - t- t- t- t- r- r- r- I-- I - y -1- - t- + -r - - 0.3 1 I i - _ I 1 I -- -- -- -- ----- - - - - -- ------ - - - - -- ----- - - - - -- - - - - - -- I ! I I I I 1 I I I I ! I I I I I i I I 1 I I I I I N _ w 0 a_1_1_ +-- f. _1__I_J_ }_1 -+_ +_ 1_,__L _I__1__I_ I_ -_ a_ I_+_+_4_L_ 0.26 I i I 1 1 ? 1 1 I I i I I i - - - - - - - - - rr - z - T - ; - - r - r - r - r - I - - -- - r r r_r_r r r r ,- �- r r r r 0 0.24- - - 1__1_1 _L -__� _____ i__ 1_ J- 1_ 1- 1_1- L- L_L_._1__I,__I_�__I_ -!_ J_. L_ L_ L_L.._ u- 0.22- _ I ! - " i _ I - I i _ l - i _ Z" - r _. I _ I _ _ I - "I - 1 1 - 7 - r - T - r - r" - f - ' - r - I - - 1 - - I - 'i - l ... .. 7 1 7 - r - F 0.2 - 1 - L _ L - -- " I- - - -1 - ' -'- 1- 1- S- L- 1- I-- I-- 1---- 1- 1- J_1_1_1_L -L 0.18 - I r I - - I - - I +-+-*- F- I-- I-- I-- I-- I--' 1-- F-+-+-+- h- F- 1-- I-- I-- I- 1- 1- "t- +- *- + -F -I-- 0.16- I I I I - 1 _I - I - - I - -- 1 I I I I . -- - - - - -- _ - I ! I IL - � -� __ _ - '- -' -_ _"�� i� � 0.14 - -- - -- -I_ L_ 1__---- '---- 1- .1- 1_1- L_L- L- '- -I - -I- J_ 1_ 1_ 1 _ 1_ L_L1 0.12 I r I i r 1 7 - 7 T T r r r i I 1 1 T? L' I J -� - �-- I_- 1- -1 - -I- I- J--- 1- J-- L- L 0.1 I I 0.08 _i__1_ - 1- i __ _ - _ 0.06 . - - -- - -_ I _ _ _ I _ I - - -- _ - - 1 " ` � ' - -- -- - - � � _ � - - - - - -- - - 0.04- '- +- - -- - - -- -- -- - 'I - - I - -4 - + - + - + _. {- ..- I.. -- I._ _ I... - I -- - -1._ _., .._ -, .._ ..{ - 0.02 - - 0 2 4 6 8 10 12 14 16 18 20 2224 26 2830 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 768 70 72 Time (hours) MMW Fl LT SWALE WEST COURTS 11 -17 -10 Type 1124 -hr 100 year Rainfall = 5.90" Prepared by Inspec Printed 12/3/2010 HydroCADO 9.00 s/n 06027 © 2009 HydroCAD Software Solutions LLC Page 25 Summary for Link 2L: Total Runoff to Existing Pond Inflow Area = 0.170 ac,100.00% Impervious, Inflow Depth = 0.27" for 100 year event Inflow = 0.03 cfs @ 12.61 hrs, Volume= 0.004 of Primary = 0.03 cfs @ 12.61 hrs, Volume= 0.004 af, Atten= 0 %, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00 -72.00 hrs, dt= 0.01 hrs Link 2L: Total Runoff to Existing Pond Hydrograph — Inflow — Primary N U 3 O LL 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours)