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WPO201500038 Calculations 2015-12-22 (2)
Post Area #2 Prepared by TIMMONS GROUP H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Printed 12/17/2015 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 0.000 1.560 0.000 0.000 1.560 >75% Grass cover, Good 1 S, 3S 0.000 0.000 0.000 0.000 0.280 0.280 Impervious is 0.000 1.020 0.000 0.000 0.000 1.020 Paved parking 3S 0.000 0.040 0.270 0.000 0.000 0.310 Woods, Good 1S, 3S 0.000 1.060 1.830 0.000 0.280 3.170 TOTAL AREA Post Area #2 Prepared by TIMMONS GROUP Printed 12/17/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 5 Pipe Listing (all nodes) Line# Node In -Invert Out -Invert Length Slope n DiamMidth Height Inside -Fill Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) 1 2P 463.50 462.50 73.2 0.0137 0.013 15.0 0.0 0.0 Post Area #2 Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 12/17/2015 H droCAD® 10.00 s/n O6538 @2013 H droCAD Software Solutions LLC Page 6 Summary for Subcatchment 1S: PostDev #2 Unrouted Runoff = 2.74 cfs @ 12.15 hrs, Volume= 0.213 af, Depth> 1.56" 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=3.68" Area (ac) CN Description 0.280 98 Impervious 1.090 74 >75% Grass cover, Good, HSG C 0.270 70 Woods, Good, HSG C 1.640 77 Weighted Average 1.360 0.09 82.93% Pervious Area 0.280 17.07% Impervious Area Tc Length Slope Velocity Capacity Description min feet ft/ft) (ft/sec) (cfs 15.3 80 0.0250 0.09 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 5.7 300 0.0200 0.88 1.75 Channel Flow, Area= 2.0 sf Perim= 2.0' r= 1.00' n= 0.240 21.0 380 Total Subcatchment IS: PostDev #2 Unrouted Hydrograph 2.74 cfs Type 1124-h r 2 -Year Rainfall=3.68" Runoff Area=1.640 ac 2 Runoff Volume=0.213 of Runoff Depth>1.56" 3 Flow Length=380' ° Tc=21.0 min u_ 1 CN=77 1 ►friiifiriF�rrrir�rrrfirriirrrrrriirr�iir ...f. 0 2 4 6 8 10 12 14 16 18 20 Runoff Post Area #2 Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 12/17/2015 HydroCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 7 Hydrograph for Subcatchment 1 S: PostDev #2 Unrouted 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 0.49 0.00 0.00 9.00 0.54 0.00 0.00 9.50 0.60 0.00 0.00 10.00 0.67 0.00 0.00 10.50 0.75 0.01 0.02 11.00 0.86 0.02 0.04 11.50 1.04 0.06 0.10 12.00 2.44 0.70 1.65 12.50 2.70 0.87 0.88 13.00 2.84 0.96 0.33 13.50 2.94 1.03 0.23 14.00 3.02 1.08 0.18 14.50 3.08 1.13 0.15 15.00 3.14 1.17 0.14 15.50 3.19 1.21 0.12 16.00 3.24 1.24 0.11 16.50 3.28 1.27 0.10 17.00 3.32 1.30 0.09 17.50 3.36 1.32 0.09 18.00 3.39 1.35 0.08 18.50 3.42 1.37 0.08 19.00 3.45 1.39 0.07 19.50 3.48 1.41 0.07 20.00 3.50 1.43 0.06 20.50 3.53 1.45 0.06 21.00 3.55 1.47 0.06 21.50 3.57 1.48 0.06 22.00 3.60 1.50 0.06 22.50 3.62 1.52 0.05 23.00 3.64 1.53 0.05 23.50 3.66 1.55 0.05 24.00 3.68 1.57 0.05 Post Area #2 Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 12/17/2015 H droCADa 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Paae 8 Summary for Subcatchment 3S: PostDev #2 to Storage System #2 Runoff = 6.72 cfs @ 11.98 hrs, Volume= 0.333 af, Depth> 2.61" 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=3.68" Area (ac) CN Description 1.020 98 Paved parking, HSG B 0.470 74 >75% Grass cover, Good, HSG C 0.040 55 Woods, Good. HSG B 1.530 90 Weighted Average 0.510 33.33% Pervious Area 1.020 66.67% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) cfs 6.5 Direct Entry, 7 Subcatchment 3S: PostDev #2 to Storage System #2 Hydrograph 1 6.72 ds Type II 24 -hr 6 2 -Year Rainfall=3.68" 5 Runoff Area=1.530 ac ,U Runoff Volume=0.333 of 4. Runoff Depth>2.61" c Tc=6.5 min E: 3-- CN=90 2 1 1•.rirrsriri�riririiiii�rriir�i�irrr��� - - - • �i�ir�rrrirri�rrf�irirri• 0 2 4 6 8 10 12 14 16 18 20 Runoff Post Area #2 Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 12/17/2015 H droCAD® 10.00 s/n 06538 © 2013 HvdroCAD Software Solutions LLC Page 9 Hydrograph for Subcatchment 3S: PostDev #2 to Storage System #2 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 0.01 6.00 0.29 0.00 0.01 6.50 0.33 0.01 0.02 7.00 0.36 0.02 0.02 7.50 0.40 0.03 0.03 8.00 0.44 0.04 0.04 8.50 0.49 0.05 0.05 9.00 0.54 0.07 0.07 9.50 0.60 0.10 0.08 10.00 0.67 0.13 0.10 10.50 0.75 0.17 0.15 11.00 0.86 0.24 0.23 11.50 1.04 0.35 0.41 12.00 2.44 1.48 6.39 12.50 2.70 1.72 0.56 13.00 2.84 1.84 0.34 13.50 2.94 1.93 0.26 14.00 3.02 2.00 0.20 14.50 3.08 2.06 0.18 15.00 3.14 2.11 0.16 15.50 3.19 2.16 0.14 16.00 3.24 2.20 0.12 16.50 3.28 2.24 0.12 17.00 3.32 2.28 0.11 17.50 3.36 2.31 0.10 18.00 3.39 2.34 0.10 18.50 3.42 2.37 0.09 19.00 3.45 2.40 0.08 19.50 3.48 2.43 0.08 20.00 3.50 2.45 0.07 20.50 3.53 2.47 0.07 21.00 3.55 2.50 0.07 21.50 3.57 2.52 0.07 22.00 3.60 2.54 0.06 22.50 3.62 2.56 0.06 23.00 3.64 2.58 0.06 23.50 3.66 2.60 0.06 24.00 3.68 2.62 0.06 Post Area #2 Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 12/17/2015 H droCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 10 Summary for Pond 2P: Storage System #2 Inflow Area = 1.530 ac, 66.67% Impervious, Inflow Depth > 2.61" for 2 -Year event Inflow = 6.72 cfs @ 11.98 hrs, Volume= 0.333 of Outflow = 1.70 cfs @ 12.12 hrs, Volume= 0.333 af, Atten= 75%, Lag= 8.8 min Primary = 1.70 cfs @ 12.12 hrs, Volume= 0.333 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 468.73'@ 12.12 hrs Surf.Area= 0.028 ac Storage= 0.109 of Plug -Flow detention time= 27.8 min calculated for 0.333 of (100% of inflow) Center -of -Mass det. time= 27.7 min ( 825.7 - 798.1 ) Volume Invert Avail.Stora a Storage Description #1 463.50' 0.197 of 108.0" Round Pipe Storage L= 135.0' S= 0.00507' Device Routing Invert Outlet Devices #1 Primary 463.50' 15.0" Round Culvert L= 73.2' CMP, projecting, no headwall, Ke= 0.900 Inlet/ Outlet Invert= 463.50'/462.50' S=0.0137'/' Cc= 0.900 n=0.013 Concrete sewer w/manholes & inlets, Flow Area= 1.23 sf #2 Device 1 463.50' 4.5" Vert. Orifice/Grate C= 0.600 #3 Device 1 468.31' 8.2" Vert. Orifice/Grate C= 0.600 #4 Primary 471.20' 3.5' long x 0.30' rise Sharp -Crested Rectangular Weir 2 End Contraction(s) Primary OutFlow Max=1.70 cfs @ 12.12 hrs HW=468.72' (Free Discharge) 1=Culvert (Passes 1.70 cfs of 10.00 cfs potential flow) 2=Orifice/Grate (Orifice Controls 1.19 cfs @ 10.81 fps) 3=Orifice/Grate (Orifice Controls 0.51 cfs @ 2.19 fps) -Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) Post Area #2 Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 12/17/2015 H droCADO 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Pae 11 Pond 2P: Storage System #2 Hydrograph 7 �� 1 W 473 472 471 d 470 469 �a 468 w 467 466 465 464 2 4 6 8 10 12 14 16 18 20 22 24 Time (hours) Pond 2P: Storage System #2 Stage -Discharge 0 2 4 6 8 10 12 Discharge (cfs) ■ Inflow ■ Primary Primary Post Area #2 Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 12/17/2015 H droCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 12 2 2 0 4 C 4 4 R ' 4 d w H 4 0 Pond 2P: Storage System #2 Stage -Area -Storage 0 0.05 0.1 0.15 Storage (acre-feet) Storage Post Area #2 Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 12/17/2015 HydroCAD® 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Pane 11 Hydrograph for Pond 2P: Storage System #2 Time Inflow Storage Elevation Primary hours) (Cfs) (acre-feet feet Cfs 0.00 0.00 0.000 463.50 0.00 0.50 0.00 0.000 463.50 0.00 1.00 0.00 0.000 463.50 0.00 1.50 0.00 0.000 463.50 0.00 2.00 0.00 0.000 463.50 0.00 2.50 0.00 0.000 463.50 0.00 3.00 0.00 0.000 463.50 0.00 3.50 0.00 0.000 463.50 0.00 4.00 0.00 0.000 463.50 0.00 4.50 0.00 0.000 463.50 0.00 5.00 0.00 0.000 463.50 0.00 5.50 0.01 0.000 463.52 0.01 6.00 0.01 0.000 463.54 0.01 6.50 0.02 0.000 463.57 0.02 7.00 0.02 0.000 463.59 0.02 7.50 0.03 0.000 463.61 0.03 8.00 0.04 0.000 463.62 0.04 8.50 0.05 0.000 463.64 0.05 9.00 0.07 0.000 463.66 0.07 9.50 0.08 0.000 463.68 0.08 10.00 0.10 0.000 463.71 0.10 10.50 0.15 0.000 463.76 0.15 11.00 0.23 0.001 463.86 0.22 11.50 0.41 0.002 464.10 0.34 12.00 6.39 0.085 467.84 1.08 12.50 0.56 0.095 468.20 1.13 13.00 0.34 0.068 467.22 1.00 13.50 0.26 0.042 466.22 0.85 14.00 0.20 0.020 465.25 0.67 14.50 0.18 0.005 464.36 0.44 15.00 0.16 0.000 463.79 0.16 15.50 0.14 0.000 463.76 0.14 16.00 0.12 0.000 463.74 0.13 16.50 0.12 0.000 463.73 0.12 17.00 0.11 0.000 463.72 0.11 17.50 0.10 0.000 463.71 0.10 18.00 0.10 0.000 463.71 0.10 18.50 0.09 0.000 463.70 0.09 19.00 0.08 0.000 463.69 0.08 19.50 0.08 0.000 463.68 0.08 20.00 0.07 0.000 463.67 0.07 20.50 0.07 0.000 463.67 0.07 21.00 0.07 0.000 463.66 0.07 21.50 0.07 0.000 463.66 0.07 22.00 0.06 0.000 463.66 0.06 22.50 0.06 0.000 463.66 0.06 23.00 0.06 0.000 463.66 0.06 23.50 0.06 0.000 463.65 0.06 24.00 0.06 0.000 463.65 0.06 Post Area #2 Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 12/17/2015 H droCAD@ 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 14 Elevation Primary (feet) (Cfs) 463.50 0.00 463.60 0.03 463.70 0.09 463.80 0.18 463.90 0.25 464.00 0.30 464.10 0.34 464.20 0.38 464.30 0.42 464.40 0.45 464.50 0.48 464.60 0.51 464.70 0.54 464.80 0.56 464.90 0.59 465.00 0.61 465.10 0.63 465.20 0.65 465.30 0.68 465.40 0.70 465.50 0.72 465.60 0.74 465.70 0.75 465.80 0.77 465.90 0.79 466.00 0.81 466.10 0.83 466.20 0.84 466.30 0.86 466.40 0.88 466.50 0.89 466.60 0.91 466.70 0.92 466.80 0.94 466.90 0.95 467.00 0.97 467.10 0.98 467.20 1.00 467.30 1.01 467.40 1.02 467.50 1.04 467.60 1.05 467.70 1.07 467.80 1.08 467.90 1.09 468.00 1.10 468.10 1.12 468.20 1.13 468.30 1.14 468.40 1.18 468.50 1.29 468.60 1.45 Stage -Discharge for Pond 2P: Storage System #2 Elevation Primary (feet) (Cfs) 468.70 1.65 468.80 1.87 468.90 2.09 469.00 2.27 469.10 2.42 469.20 2.56 469.30 2.68 469.40 2.80 469.50 2.91 469.60 3.01 469.70 3.11 469.80 3.21 469.90 3.30 470.00 3.39 470.10 3.47 470.20 3.55 470.30 3.63 470.40 3.71 470.50 3.79 470.60 3.86 470.70 3.94 470.80 4.01 470.90 4.08 471.00 4.14 471.10 4.21 471.20 4.28 471.30 4.70 471.40 5.42 471.50 6.31 471.60 7.02 471.70 7.56 471.80 8.03 471.90 8.45 472.00 8.84 472.10 9.20 472.20 9.54 472.30 9.86 472.40 10.17 472.50 10.47 472.60 10.75 472.70 11.03 472.80 11.29 472.90 11.55 473.00 11.81 473.10 12.05 Post Area #2 Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 12/17/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 15 Stage -Area -Storage for Pond 2P: Storage System #2 Elevation Storage (feet) _(acre-feet) 463.50 0.000 463.60 0.000 463.70 0.000 463.80 0.000 463.90 0.001 464.00 0.001 464.10 0.002 464.20 0.003 464.30 0.004 464.40 0.005 464.50 0.007 464.60 0.008 464.70 0.010 464.80 0.011 464.90 0.013 465.00 0.015 465.10 0.017 465.20 0.019 465.30 0.021 465.40 0.023 465.50 0.025 465.60 0.027 465.70 0.030 465.80 0.032 465.90 0.034 466.00 0.037 466.10 0.039 466.20 0.041 466.30 0.044 466.40 0.046 466.50 0.049 466.60 0.051 466.70 0.054 466.80 0.057 466.90 0.059 467.00 0.062 467.10 0.065 467.20 0.067 467.30 0.070 467.40 0.073 467.50 0.075 467.60 0.078 467.70 0.081 467.80 0.084 467.90 0.086 468.00 0.089 468.10 0.092 468.20 0.095 468.30 0.098 468.40 0.100 468.50 0.103 468.60 0.106 Elevation Storage (feet) (acre-feet) 468.70 0.109 468.80 0.111 468.90 0.114 469.00 0.117 469.10 0.120 469.20 0.122 469.30 0.125 469.40 0.128 469.50 0.131 469.60 0.133 469.70 0.136 469.80 0.139 469.90 0.141 470.00 0.144 470.10 0.146 470.20 0.149 470.30 0.151 470.40 0.154 470.50 0.156 470.60 0.159 470.70 0.161 470.80 0.164 470.90 0.166 471.00 0.168 471.10 0.170 471.20 0.173 471.30 0.175 471.40 0.177 471.50 0.179 471.60 0.181 471.70 0.183 471.80 0.184 471.90 0.186 472.00 0.188 472.10 0.189 472.20 0.191 472.30 0.192 472.40 0.193 472.50 0.194 472.60 0.195 472.70 0.196 472.80 0.197 472.90 0.197 473.00 0.197 473.10 0.197 Post Area #2 Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 12/17/2015 HvdroCADO 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 16 Summary for Link 3L: Outfall Inflow Area = 3.170 ac, 41.01 % Impervious, Inflow Depth > 2.07" for 2 -Year event Inflow = 4.43 cfs @ 12.13 hrs, Volume= 0.546 of Primary = 4.43 cfs @ 12.13 hrs, Volume= 0.546 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs 3 0 Link 3L: Outfall Hydrograph 0 2 4 6 8 10 12 14 16 18 20 22 24 Time (hours) ■ Inflow ■ Primary Post Area #2 Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 12/17/2015 H droCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 17 Hydrograph for Link 3L: Outfall 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 0.02 0.00 0.02 7.00 0.02 0.00 0.02 7.50 0.03 0.00 0.03 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 0.11 0.00 0.11 10.50 0.16 0.00 0.16 11.00 0.26 0.00 0.26 11.50 0.44 0.00 0.44 12.00 2.73 0.00 2.73 12.50 2.01 0.00 2.01 13.00 1.33 0.00 1.33 13.50 1.08 0.00 1.08 14.00 0.85 0.00 0.85 14.50 0.59 0.00 0.59 15.00 0.30 0.00 0.30 15.50 0.27 0.00 0.27 16.00 0.24 0.00 0.24 16.50 0.22 0.00 0.22 17.00 0.20 0.00 0.20 17.50 0.19 0.00 0.19 18.00 0.18 0.00 0.18 18.50 0.17 0.00 0.17 19.00 0.16 0.00 0.16 19.50 0.14 0.00 0.14 20.00 0.13 0.00 0.13 20.50 0.13 0.00 0.13 21.00 0.12 0.00 0.12 21.50 0.12 0.00 0.12 22.00 0.12 0.00 0.12 22.50 0.12 0.00 0.12 23.00 0.12 0.00 0.12 23.50 0.11 0.00 0.11 24.00 0.11 0.00 0.11 Post Area #2 Type 11 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 12/17/2015 H droCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Paoe 18 Summary for Subcatchment 1S: PostDev #2 Unrouted Runoff = 5.50 cfs @ 12.14 hrs, Volume= 0.421 af, Depth> 3.08" 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=5.56" Area (ac) CN Description " 0.280 98 Impervious 1.090 74 >75% Grass cover, Good, HSG C 0.270 70 Woods. Good. HSG C 1.640 77 Weighted Average 1.360 0.09 82.93% Pervious Area 0.280 17.07% Impervious Area Tc Length Slope Velocity Capacity Description mint feet ft/ft ft/sec cfs 15.3 80 0.0250 0.09 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 5.7 300 0.0200 0.88 1.75 Channel Flow, Area= 2.0 sf Perim= 2.0' r= 1.00' n= 0.240 21.0 380 Total Subcatchment 1S: PostDev #2 Unrouted Hydrograph s 5.50 cfs 1 Type II 24 -hr 5 10 -Year Rainfall=5.56" Runoff Area=1.640 ac 4 Runoff Volume=0.421 of Runoff Depth>3.08" 3 3 Flow Length=380' ° Tc=21.0 min v_ 2 CN=77 i ' �f!!///J//!/!!/!!J//f!/J`!J/!////%J// rr-' -- - - - - • •+riiriirrrrrirrrr 6 8 10 12 14 16 18 20 22 24 In Runoff Post Area #2 Type// 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 12/17/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 19 Hydrograph for Subcatchment 1 S: PostDev #2 Unrouted 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 0.40 0.00 0.00 6.00 0.44 0.00 0.00 6.50 0.50 0.00 0.00 7.00 0.55 0.00 0.00 7.50 0.61 0.00 0.00 8.00 0.67 0.00 0.00 8.50 0.74 0.01 0.01 9.00 0.82 0.02 0.03 9.50 0.91 0.03 0.04 10.00 1.01 0.05 0.06 10.50 1.13 0.08 0.10 11.00 1.31 0.14 0.17 11.50 1.57 0.24 0.31 12.00 3.69 1.57 3.56 12.50 4.09 1.88 1.66 13.00 4.29 2.04 0.60 13.50 4.44 2.16 0.42 14.00 4.56 2.26 0.33 14.50 4.66 2.34 0.27 15.00 4.75 2.41 0.24 15.50 4.82 2.48 0.22 16.00 4.89 2.53 0.19 16.50 4.96 2.59 0.17 17.00 5.01 2.63 0.16 17.50 5.07 2.68 0.15 18.00 5.12 2.72 0.15 18.50 5.17 2.77 0.14 19.00 5.21 2.80 0.13 19.50 5.26 2.84 0.12 20.00 5.29 2.87 0.11 20.50 5.33 2.90 0.10 21.00 5.36 2.93 0.10 21.50 5.40 2.96 0.10 22.00 5.43 2.99 0.10 22.50 5.47 3.02 0.09 23.00 5.50 3.04 0.09 23.50 5.53 3.07 0.09 24.00 5.56 3.10 0.09 Post Area #2 Type 11 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 12/17/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 20 Summary for Subcatchment 3S: PostDev #2 to Storage System #2 Runoff = 10.97 cfs @ 11.97 hrs, Volume= 0.563 af, Depth> 4.41" 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=5.56" Area (ac) CN Description 1.020 98 Paved parking, HSG B 0.470 74 >75% Grass cover, Good, HSG C 0.040 55 Woods, Good, HSG B 1.530 90 Weighted Average 0.510 33.33% Pervious Area 1.020 66.67% Impervious Area Tc Length Slope Velocity Capacity Description min feet ft/ftft/sec cfs 6.5 Direct Entry, Subcatchment 3S: PostDev #2 to Storage System #2 Hydrograph 12 10.97 cfs 11 Type 1124-h r 10 10 -Year Rainfall=5.56" 9 Runoff Area=1.530 ac 7 Runoff Volume=0.563 of 6 Runoff Depth>4.41" c Tc=6.5 min 5 4 CN=90 3 2- 1 0 0 2 4 6 8 10 12 14 16 18 20 22 24 Time (hours) Runoff Post Area #2 Type 11 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 12/17/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 21 Hydrograph for Subcatchment 3S: PostDev #2 to Storage System #2 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 0.01 4.50 0.31 0.01 0.02 5.00 0.35 0.01 0.02 5.50 0.40 0.02 0.03 6.00 0.44 0.04 0.05 6.50 0.50 0.05 0.06 7.00 0.55 0.07 0.07 7.50 0.61 0.10 0.08 8.00 0.67 0.13 0.09 8.50 0.74 0.16 0.12 9.00 0.82 0.21 0.15 9.50 0.91 0.26 0.17 10.00 1.01 0.32 0.21 10.50 1.13 0.41 0.29 11.00 1.31 0.54 0.43 11.50 1.57 0.74 0.74 12.00 3.69 2.62 10.39 12.50 4.09 3.00 0.89 13.00 4.29 3.20 0.54 13.50 4.44 3.34 0.41 14.00 4.56 3.45 0.32 14.50 4.66 3.55 0.28 15.00 4.75 3.63 0.25 15.50 4.82 3.71 0.22 16.00 4.89 3.77 0.20 16.50 4.96 3.83 0.18 17.00 5.01 3.89 0.17 17.50 5.07 3.94 0.16 18.00 5.12 3.99 0.15 18.50 5.17 4.04 0.14 19.00 5.21 4.08 0.13 19.50 5.26 4.12 0.12 20.00 5.29 4.16 0.11 20.50 5.33 4.19 0.11 21.00 5.36 4.23 0.10 21.50 5.40 4.26 0.10 22.00 5.43 4.29 0.10 22.50 5.47 4.33 0.10 23.00 5.50 4.36 0.10 23.50 5.53 4.39 0.09 24.00 5.56 4.42 0.09 Post Area #2 Type 11 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 12/17/2015 HvdroCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 22 Summary for Pond 2P: Storage System #2 Inflow Area = 1.530 ac, 66.67% Impervious, Inflow Depth > 4.41" for 10 -Year event Inflow = 10.97 cfs @ 11.97 hrs, Volume= 0.563 of Outflow = 4.29 cfs @ 12.08 hrs, Volume= 0.562 af, Atten= 61 %, Lag= 6.6 min Primary = 4.29 cfs @ 12.08 hrs, Volume= 0.562 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 471.21'@ 12.08 hrs Surf.Area= 0.021 ac Storage= 0.173 of Plug -Flow detention time= 25.8 min calculated for 0.562 of (100% of inflow) Center -of -Mass det. time= 25.7 min ( 809.2 - 783.5 ) Volume Invert Avail.Stora a Storage Description #1 463.50' 0.197 of 108.0" Round Pipe Storage L= 135.0' S= 0.00507' Device Routing Invert Outlet Devices #1 Primary 463.50' 15.0" Round Culvert L= 73.2' CMP, projecting, no headwall, Ke= 0.900 Inlet/ Outlet Invert= 463.50'/ 462.50' S=0.0137'/' Cc= 0.900 n=0.013 Concrete sewer w/manholes & inlets, Flow Area= 1.23 sf #2 Device 1 463.50' 4.5" Vert. Orifice/Grate C= 0.600 #3 Device 1 468.31' 8.2" Vert. Orifice/Grate C= 0.600 #4 Primary 471.20' 3.5' long x 0.30' rise Sharp -Crested Rectangular Weir 2 End Contraction(s) PrimautFlow Max=4.28 cfs @ 12.08 hrs HW=471.20' (Free Discharge) 1=Culvert (Passes 4.28 cfs of 12.41 cfs potential flow) �2=OrificelGrate (Orifice Controls 1.46 cfs @ 13.20 fps) 3=Orifice/Grate (Orifice Controls 2.82 cfs @ 7.69 fps) -4--Sharp-Crested Rectangular Weir (Weir Controls 0.00 cfs @ 0.22 fps) Post Area #2 Type 11 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 12/17/2015 H droCAD® 10.00 s/n 06538 @2013 HvdroCAD Software Solutions LLC Page 23 Pond 2P: Storage System #2 Hydrograph 12 11 10 9 ., 8 7 3 6 0 5 4 3 2 1 0 0 473 472 471 a� 470 c 469 468 0 467 Lu 466 465 464 2 4 6 8 10 12 14 16 18 20 22 24 Time (hours) Pond 2P: Storage System #2 Stage -Discharge Sharp -Crested Rectangular Weir Orifice/Grate Culvert + Orifice/Grate 0 2 4 6 8 Discharge (cfs) 10 12 Inflow Primary ® Primary Post Area #2 Type 11 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 12/17/2015 H droCADO 10.00 s/n 06538 © 2013 HvdroCAD Software Solutions LLC Page 24 473 472 471 d 470 469 C �a 468 467 w EK11%1:� 465 Pond 2P: Storage System #2 Stage -Area -Storage 0 0.05 0.1 0.15 Storage (acre-feet) Storage Post Area #2 Type 11 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 12/17/2015 H droCAD® 10.00 s/n 06538 @2013 HvdroCAD Software Solutions LLC Page 25 Hydrograph for Pond 2P: Storage System #2 Time Inflow Storage Elevation Primary hours cfs) (acre -feel feat cfs 0.00 0.00 0.000 463.50 0.00 0.50 0.00 0.000 463.50 0.00 1.00 0.00 0.000 463.50 0.00 1.50 0.00 0.000 463.50 0.00 2.00 0.00 0.000 463.50 0.00 2.50 0.00 0.000 463.50 0.00 3.00 0.00 0.000 463.50 0.00 3.50 0.00 0.000 463.50 0.00 4.00 0.01 0.000 463.53 0.01 4.50 0.02 0.000 463.56 0.02 5.00 0.02 0.000 463.60 0.02 5.50 0.03 0.000 463.61 0.03 6.00 0.05 0.000 463.63 0.04 6.50 0.06 0.000 463.65 0.06 7.00 0.07 0.000 463.66 0.07 7.50 0.08 0.000 463.68 0.08 8.00 0.09 0.000 463.70 0.09 8.50 0.12 0.000 463.73 0.11 9.00 0.15 0.000 463.77 0.15 9.50 0.17 0.000 463.79 0.17 10.00 0.21 0.001 463.84 0.21 10.50 0.29 0.001 463.95 0.27 11.00 0.43 0.003 464.16 0.37 11.50 0.74 0.008 464.60 0.51 12.00 10.39 0.149 470.21 3.56 12.50 0.89 0.114 468.88 2.05 13.00 0.54 0.088 467.95 1.10 13.50 0.41 0.064 467.09 0.98 14.00 0.32 0.041 466.20 0.84 14.50 0.28 0.022 465.35 0.69 15.00 0.25 0.008 464.60 0.51 15.50 0.22 0.001 464.00 0.30 16.00 0.20 0.000 463.83 0.20 16.50 0.18 0.000 463.81 0.18 17.00 0.17 0.000 463.80 0.17 17.50 0.16 0.000 463.78 0.16 18.00 0.15 0.000 463.77 0.15 18.50 0.14 0.000 463.76 0.14 19.00 0.13 0.000 463.75 0.13 19.50 0.12 0.000 463.73 0.12 20.00 0.11 0.000 463.72 0.11 20.50 0.11 0.000 463.72 0.11 21.00 0.10 0.000 463.72 0.10 21.50 0.10 0.000 463.71 0.10 22.00 0.10 0.000 463.71 0.10 22.50 0.10 0.000 463.71 0.10 23.00 0.10 0.000 463.71 0.10 23.50 0.09 0.000 463.70 0.09 24.00 0.09 0.000 463.70 0.09 Post Area #2 Type 11 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 12/17/2015 N droCAD® 10.00 s/n 06538 @ 2013 H droCAD Software Solutions LLC Page 26 Elevation Primary (feet) (cfs) 463.50 0.00 463.60 0.03 463.70 0.09 463.80 0.18 463.90 0.25 464.00 0.30 464.10 0.34 464.20 0.38 464.30 0.42 464.40 0.45 464.50 0.48 464.60 0.51 464.70 0.54 464.80 0.56 464.90 0.59 465.00 0.61 465.10 0.63 465.20 0.65 465.30 0.68 465.40 0.70 465.50 0.72 465.60 0.74 465.70 0.75 465.80 0.77 465.90 0.79 466.00 0.81 466.10 0.83 466.20 0.84 466.30 0.86 466.40 0.88 466.50 0.89 466.60 0.91 466.70 0.92 466.80 0.94 466.90 0.95 467.00 0.97 467.10 0.98 467.20 1.00 467.30 1.01 467.40 1.02 467.50 1.04 467.60 1.05 467.70 1.07 467.80 1.08 467.90 1.09 468.00 1.10 468.10 1.12 468.20 1,13 468.30 1.14 468.40 1.18 468.50 1.29 468.60 1.45 Stage -Discharge for Pond 2P: Storage System #2 Elevation Primary (feet) (cfs) 468.70 1.65 468.80 1.87 468.90 2.09 469.00 2.27 469.10 2.42 469.20 2.56 469.30 2.68 469.40 2.80 469.50 2.91 469.60 3.01 469.70 3.11 469.80 3.21 469.90 3.30 470.00 3.39 470.10 3.47 470.20 3.55 470.30 3.63 470.40 3.71 470.50 3.79 470.60 3.86 470.70 3.94 470.80 4.01 470.90 4.08 471.00 4.14 471.10 4.21 471.20 4.28 471.30 4.70 471.40 5.42 471.50 6.31 471.60 7.02 471.70 7.56 471.80 8.03 471.90 8.45 472.00 8.84 472.10 9.20 472.20 9.54 472.30 9.86 472.40 10.17 472.50 10.47 472.60 10.75 472.70 11.03 472.80 11.29 472.90 11.55 473.00 11.81 473.10 12.05 Post Area #2 Type 11 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 12/17/2015 HvdroCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 27 Elevation Storage (feet) (acre-feet) 463.50 0.000 463.60 0.000 463.70 0.000 463.80 0.000 463.90 0.001 464.00 0.001 464.10 0.002 464.20 0.003 464.30 0.004 464.40 0.005 464.50 0.007 464.60 0.008 464.70 0.010 464.80 0.011 464.90 0.013 465.00 0.015 465.10 0.017 465.20 0.019 465.30 0.021 465.40 0.023 465.50 0.025 465.60 0.027 465.70 0.030 465.80 0.032 465.90 0.034 466.00 0.037 466.10 0.039 466.20 0.041 466.30 0.044 466.40 0.046 466.50 0.049 466.60 0.051 466.70 0.054 466.80 0.057 466.90 0.059 467.00 0.062 467.10 0.065 467.20 0.067 467.30 0.070 467.40 0.073 467.50 0.075 467.60 0.078 467.70 0.081 467.80 0.084 467.90 0.086 468.00 0.089 468.10 0.092 468.20 0.095 468.30 0.098 468.40 0.100 468.50 0.103 468.60 0.106 Stage -Area -Storage for Pond 2P: Storage System #2 Elevation Storage (feet) acre-feet 468.70 0.109 468.80 0.111 468.90 0.114 469.00 0.117 469.10 0.120 469.20 0.122 469.30 0.125 469.40 0.128 469.50 0.131 469.60 0.133 469.70 0.136 469.80 0.139 469.90 0.141 470.00 0.144 470.10 0.146 470.20 0.149 470.30 0.151 470.40 0.154 470.50 0.156 470.60 0.159 470.70 0.161 470.80 0.164 470.90 0.166 471.00 0.168 471.10 0.170 471.20 0.173 471.30 0.175 471.40 0.177 471.50 0.179 471.60 0.181 471.70 0.183 471.80 0.184 471.90 0.186 472.00 0.188 472.10 0.189 472.20 0.191 472.30 0.192 472.40 0.193 472.50 0.194 472.60 0.195 472.70 0.196 472.80 0.197 472.90 0.197 473.00 0.197 473.10 0.197 Post Area #2 Type 11 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 12/17/2015 HvdroCADO 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 28 Summary for Link 3L: Outfall Inflow Area = 3.170 ac, 41.01 % Impervious, Inflow Depth > 3.72" for 10 -Year event Inflow = 9.67 cfs @ 12.12 hrs, Volume= 0.984 of Primary = 9.67 cfs @ 12.12 hrs, Volume= 0.984 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs 1 w 3 0 M Link 3L: Outfall Hydrograph U 0 2 4 6 8 10 12 14 16 18 20 22 24 Time (hours) ■ Inflow ■ Primary Post Area #2 Type 11 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 12/17/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Paae 29 Hydrograph for Link 3L: Outfall Time hours Inflow ifs Elevation feet) Primary (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 0.02 0.00 0.02 5.00 0.02 0.00 0.02 5.50 0.03 0.00 0.03 6.00 0.04 0.00 0.04 6.50 0.06 0.00 0.06 7.00 0.07 0.00 0.07 7.50 0.08 0.00 0.08 8.00 0.09 0.00 0.09 8.50 0.13 0.00 0.13 9.00 0.18 0.00 0.18 9.50 0.21 0.00 0.21 10.00 0.27 0.00 0.27 10.50 0.37 0.00 0.37 11.00 0.53 0.00 0.53 11.50 0.82 0.00 0.82 12.00 7.13 0.00 7.13 12.50 3.70 0.00 3.70 13.00 1.70 0.00 1.70 13.50 1.40 0.00 1.40 14.00 1.17 0.00 1.17 14.50 0.96 0.00 0.96 15.00 0.75 0.00 0.75 15.50 0.52 0.00 0.52 16.00 0.39 0.00 0.39 16.50 0.36 0.00 0.36 17.00 0.34 0.00 0.34 17.50 0.32 0.00 0.32 18.00 0.30 0.00 0.30 18.50 0.28 0.00 0.28 19.00 0.26 0.00 0.26 19.50 0.24 0.00 0.24 20.00 0.22 0.00 0.22 20.50 0.21 0.00 0.21 21.00 0.20 0.00 0.20 21.50 0.20 0.00 0.20 22.00 0.20 0.00 0.20 22.50 0.19 0.00 0.19 23.00 0.19 0.00 0.19 23.50 0.18 0.00 0.18 24.00 0.18 0.00 0.18