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Drainage Diagram for Proposed Conditions 7-1-05
CITY OF CHANHASSEN RECEIVED JUL 0 1 2005 CHANHASSEN PLANNING DEPT ~Ubcay IReachl ~ ~ Drainage Diagram for Proposed Conditions Prepared by {enter your company name here} 7/1/2005 HydroCAD@ 7.00 sIn 002540 @ 1986-2003 Applied Microcomputer Systems Proposed Conditions Prepared by {enter your company name here} HydroCAD@ 7.00 sIn 002540 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 10- Year Storm Rainfal/=4.20" Page 2 7/1/2005 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+ Trans method - Pond routing by Stor-Ind method Subcatchment Proposed Lots: Runoff Area=61 ,370 sf Runoff Depth=1.33" Tc=7.0 min CN=70 Runoff=3.47 cfs 0.156 af Total Runoff Area = 1.409 ac Runoff Volume = 0.156 af Average Runoff Depth = 1.33" Proposed Conditions Prepared by {enter your company name here} HydroCAO@7.00 sIn 002540 @ 1986-2003 Applied Microcomputer Systems Type" 24-hr 10- Year Storm Rainfal/=4.20" Page 3 7/1/2005 Subcatchment Proposed Lots: Runoff = 3.47 cfs @ 11.99 hrs, Volume= 0.156 af, Depth= 1.33" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-Year Storm Rainfall=4.20" Area (sf) 46,028 15,342 61,370 CN Description 61 >75% Grass cover, Good, HSG B 98 Paved parking & roofs 70 Weighted Average T c Length (min) (feet) 7.0 Slope Velocity Capacity Description (ftlft) (ftlsec) (cfs) Direct Entry, Type /I 24-hr 10- Year Storm Rainfal/=4.20" Page 4 7/1/2005 Proposed Conditions Prepared by {enter your company name here} HydroCAO@ 7.00 sin 002540 @ 1986-2003 Applied Microcomputer Systems Time (hours) 5.00 5.25 5.50 5.75 6.00 6.25 6.50 6.75 7.00 7.25 7.50 7.75 8.00 8.25 8.50 8.75 9.00 9.25 9.50 9.75 10.00 10.25 10.50 10.75 11.00 11 .25 11.50 11.75 12.00 12.25 12.50 12.75 13.00 13.25 13.50 13.75 14.00 14.25 14.50 14.75 15.00 15.25 15.50 15.75 16.00 16.25 16.50 16.75 17.00 17.25 17.50 17.75 precip. (inches) 0.26 0.28 0.30 0.32 0.34 0.36 0.37 0.40 0.42 0.44 0.46 0.48 0.50 0.53 0.56 0.59 0.62 0.65 0.68 0.72 0.76 0.81 0.86 0.92 0.99 1.08 1.19 1.63 2.78 2.97 3.09 3.17 3.24 3.30 3.36 3.40 3.44 3.48 3.52 3.55 3.58 3.62 3.64 3.67 3.70 3.72 3.74 3.77 3.79 3.81 3.83 3.85 Hydrograph for Subcatchment Proposed Lots: Excess (inches) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.12 0.60 0.70 0.76 0.81 0.85 0.89 0.92 0.95 0.97 1.00 1.02 1.04 1.06 1.08 1.10 1.12 1.13 1.15 1.16 1.18 1.19 1.20 1.22 1.23 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.04 0.08 0.58 3.45 0.58 0.37 0.27 0.23 0.20 0.18 0.16 0.14 0.13 0.13 0.12 0.11 0.11 0.10 0.10 0.09 0.09 0.08 0.08 0.08 0.08 0.08 0.07 Time (hours) 18.00 18.25 18.50 18.75 19.00 19.25 19.50 19.75 20.00 Precip. (inches) 3.87 3.89 3.90 3.92 3.94 3.95 3.97 3.98 4.00 Excess (inches) 1.24 1.25 1.27 1.28 1.29 1.30 1.31 1.32 1.33 Runoff (cfs) 0.07 0.07 0.07 0.06 0.06 0.06 0.06 0.06 0.05 I Proposed Conditions Prepared by {enter your company name here} HydroCAD@ 7.00 sIn 002540 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 100- Year Storm Rainfal/=6.00" Page 5 7/1/2005 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+ Trans method - Pond routing by Stor-Ind method Subcatchment Proposed Lots: Runoff Area=61,370 sf Runoff Depth=2.57" Tc=7.0 min CN=70 Runoff=6.69 cfs 0.302 af Total Runoff Area = 1.409 ac Runoff Volume = 0.302 af Average Runoff Depth = 2.57" ~ Proposed Conditions Prepared by {enter your company name here} HydroCAO@7.00 sIn 002540 @ 1986-2003 Applied Microcomputer Systems Type 1/24-hr 100- Year Storm Rainfal/=6.00" Page 6 7/1/2005 Subcatchment Proposed Lots: Runoff = 6.69 cfs @ 11.99 hrs, Volume= 0.302 af, Depth= 2.57" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100-Year Storm Rainfall=6.00" Area (sf) 46,028 15,342 61,370 CN Description 61 >75% Grass cover, Good, HSG B 98 Paved parking & roofs 70 Weighted Average T c Length (min) (feet) 7.0 Slope Velocity Capacity Description (ftlft) (ftlsec) (cfs) Direct Entry, . ./< Proposed Conditions Type /I 24-hr 100- Year Storm Rainfal/=6.00" Prepared by {enter your company name here} Page 7 HydroCAO@ 7.00 s/n002540 @ 1986-2003 Applied Microcomputer Systems 7/1/2005 Hydrograph for Subcatchment Proposed Lots: Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches ) (cfs) 5.00 0.38 0.00 0.00 18.00 5.53 2.43 0.12 5.25 0.40 0.00 0.00 18.25 5.55 2.45 0.12 5.50 0.43 0.00 0.00 18.50 5.58 2.47 0.11 5.75 0.45 0.00 0.00 18.75 5.60 2.49 0.11 6.00 0.48 0.00 0.00 19.00 5.63 2.51 0.10 6.25 0.51 0.00 0.00 19.25 5.65 2.53 0.10 6.50 0.54 0.00 0.00 19.50 5.67 2.55 0.10 6.75 0.56 0.00 0.00 19.75 5.69 2.56 0.09 7.00 0.59 0.00 0.00 20.00 5.71 2.58 0.09 7.25 0.62 0.00 0.00 7.50 0.66 0.00 0.00 7.75 0.69 0.00 0.00 8.00 0.72 0.00 0.00 8.25 0.75 0.00 0.00 8.50 0.79 0.00 0.00 8.75 0.84 0.00 0.00 9.00 0.88 0.00 0.00 9.25 0.93 0.00 0.01 9.50 0.98 0.00 0.01 9.75 1.03 0.01 0.02 10.00 1.09 0.01 0.03 10.25 1.15 0.02 0.04 10.50 1.22 0.03 0.06 10.75 1.31 0.04 0.08 11.00 1.41 0.06 0.12 11.25 1.54 0.09 0.17 11.50 1.70 0.14 0.26 11.75 2.32 0.37 1.46 12.00 3.98 1.32 6.61 12.25 4.24 1.49 1.04 12.50 4.41 1.61 0.66 12.75 4.53 1.70 0.48 13.00 4.63 1.77 0.41 13.25 4.72 1.83 0.35 13.50 4.79 1.88 0.31 13.75 4.86 1.93 0.28 14.00 4.92 1.98 0.25 14.25 4.97 2.02 0.23 14.50 5.03 2.06 0.22 14.75 5.07 2.09 0.21 15.00 5.12 2.13 0.20 15.25 5.16 2.16 0.19 15.50 5.21 2.19 0.17 15.75 5.24 2.22 0.16 16.00 5.28 2.25 0.15 16.25 5.31 2.27 0.15 16.50 5.35 2.30 0.14 16.75 5.38 2.32 0.14 17.00 5.41 2.35 0.14 17.25 5.44 2.37 0.13 17.50 5.47 2.39 0.13 17.75 5.50 2.41 0.12