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HomeMy WebLinkAboutWPO201200087 Calculations 2017-06-26 " . 9 > 10 ACSA Bypass Fire ¶ation 0 -0 6. 0 Site Biotilter Dominion Crane vi:Ei < 0 Cale Frazier Galaxie Residue Kubcatj Reach '.on. MI Drainage Diagram for Witmer Pond Post-Dev-As-Built / Prepared by Shimp Engineering, P.C., Printed 3/28/2017 HydroCAD®9.10 s/n 07054 ©2011 HydroCAD Software Solutions LLC • . , . Witmer Pond Post-Dev- As-Built Type /124-hr 2yr Rainfall=3.67" Prepared by Shimp Engineering, P.C. Printed 3/28/2017 HydroCAD®9.10 s/n 07054 ©2011 HydroCAD Software Solutions LLC Page 2 Summary for Subcatchment 3: Dominion Crane Runoff = 5.48 cfs @ 11.97 hrs, Volume= 0.255 af, Depth> 1.92" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr Rainfall=3.67" Area (sf) CN Description * 38,760 98 Impervious 30,714 61 >75% Grass cover, Good, HSG B 69,474 82 Weighted Average 30,714 44.21% Pervious Area 38,760 55.79% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.9 Direct Entry, Summary for Subcatchment 5: Site Runoff = 19.47 cfs @ 11.96 hrs, Volume= 0.873 af, Depth> 1.77" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr Rainfall=3.67" Area(sf) . CN Description * 135,573 98 Impervious 122,116 61 >75% Grass cover, Good, HSG B 257,689 80 Weighted Average 122,116 47.39% Pervious Area 135,573 52.61% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Subcatchment 7: Galaxie Residue Runoff = 1.38 cfs @ 12.01 hrs, Volume= 0.080 af, Depth> 0.65" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr Rainfall=3.67" Area (sf) CN Description 64,445 61 >75%Grass cover, Good, HSG'B 64,445 100.00% Pervious Area Witmer Pond Post-Dev - As-Built Type 1124-hr 2yr Rainfall=3.67" Prepared by Shimp Engineering, P.C. Printed 3/28/2017 HydroCAD®9.10 sin 07054 ©2011 HydroCAD Software Solutions LLC Page 3 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Summary for Subcatchment 9 ACSA Bypass Runoff = 1.47 cfs @ 12.09 hrs, Volume= 0.103 af, Depth> 1.00" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr Rainfall=3.67" Area (sf) CN Description 44,130 61 >75% Grass cover, Good, HSG B * 10,008 98 Impervious 54,138 68 Weighted Average 44,130 81.51% Pervious Area 10,008 18.49% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.5 Direct Entry, Summary for Pond 6: Biofilter Inflow Area= 5.916 ac, 52.61% Impervious, Inflow Depth > 1.77" for 2yr event Inflow = 19.47 cfs @ 11.96 hrs, Volume= 0.873 af Outflow = 1.98 cfs @ 12.40 hrs, Volume= 0.720 af, Atten= 90%, Lag= 26.1 min Primary = 1.75 cfs © 12.40 hrs, Volume= 0.659 of Secondary= 0.24 cfs @ 12.40 hrs, Volume= 0.061 af Tertiary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 542.02' @ 12.40 hrs Surf.Area= 10,107 sf Storage= 17,748 cf Plug-Flow detention time= 169.9 min calculated for 0.719 af (82% of inflow) Center-of-Mass det:time= 92.8 min ( 923.8 - 831.0 ) Volume Invert Avail.Storage Storage Description #1 540.00' 67,875 cf Custom Stage Data(Prismatic) Listed below (Recalc) Elevation Surf:Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 540.00 7,430 0 0 542.00 10,078 17,508 17,508 544.00 12,535 22,613 40,121 546.00 15,219 27,754 67,875 , Witmer Pond Post-Dev- As-Built Type 1124-hr 2yr Rainfall=3.67" Prepared by Shimp Engineering, P.C. Printed 3/28/2017 HydroCAD®9.10 s/n 07054 ©2011 HydroCAD Software Solutions LLC Paae 4 Device Routing Invert Outlet Devices #1 Primary 540.00' 15.0". Round STR-6 thru STR-5 L= 50.0' Ke= 0.400 Inlet/Outlet Invert= 540.00'/538.00' S= 0.0400 '/' Cc= 0.900 n= 0.011 i #2 Device 1 540.60' 7.0"W x 7.0" H Vert. STR-6 Orifice C= 0.600 #3 Device 1 542.00' 0.7' long STR-6 Weir 2 End Contraction(s) #4 Device 1 543.50' 36.0" Horiz. STR-6 Top X 0.74 C= 0.600 Limited to weir flow at low heads #5 Tertiary 544.10' 12.0' long (Profile 30) Emergency Spillway ' Head (feet) 0.49 0.98 1.48 Coef. (English) 3.80 3.86 3.86 #6 Secondary 540.00' 18.0" Round STR-20 thru STR-21 L= 50.0' Ke= 0.400 Inlet/Outlet Invert= 540.00'/538.00' S= 0.0400 '/' Cc= 0.900 n= 0.011 #7 Device 6 540.90' 3.0"Vert.STR-20 Orifice C= 0.600 . #8 Device 6 542.10' 0.7' long STR-20 Weir 2 End Contraction(s) #9 Primary 543.60' 36.0" Horiz.STR-20 Top X 0.74 C= 0.600 Limited to weir flow at low heads Le ary OutFlow Max=1.75 cfs @ 12.40 hrs HW=542.02' TW=0.00' (Dynamic Tailwater) =STR-6 thru STR-5 (Passes 1.75 cfs of 7.49 cfs potential flow) 2=STR-6 Orifice (Orifice Controls 1.74 cfs @ 5.11 fps) -3=STR-6 Weir (Weir Controls 0.01 cfs @ 0.50 fps) -4=STR-6 Top ( Controls 0.00 cfs) =STR-20 Top ( Controls 0.00 cfs) econdary OutFlow Max=0.24 cfs @ 12.40 hrs HW=542.02' TW=0.00' (Dynamic Tailwater) STR-20 thru STR-21 (Passes 0.24 cfs of 10.29 cfs potential flow) 7=STR-20 Orifice (Orifice Controls 0.24 cfs @ 4.81 fps) =STR-20 Weir ( Controls 0.00 cfs) Tertiary OutFlow Max=0.00 cfs @ 0.00 hrs HW=540.00' (Free Discharge) t5=Emergency Spillway ( Controls 0.00 cfs) Summary for Link 4: Cale Inflow Area= 1.595 ac, 55.79% Impervious, Inflow Depth > 1.92" for 2yr event Inflow = 5.48 cfs @ 11.97 hrs, Volume= 0.255 af Primary = 5.48 cfs @ 11.97 hrs, Volume= 0.255 af, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Summary for Link 8: Frazier Inflow Area= 1.479 ac, 0.00% Impervious, Inflow Depth > 1.14" for 2yr event Inflow = 1.58 cfs @ 12.02 hrs, Volume= 0.141 af Primary = 1.58 cfs @ 12.02 hrs, Volume= 0.141 af, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Witmer Pond Post-Dev - As-Built Type 1124-hr 2yr Rainfall=3.67" Prepared by Shimp Engineering, P.C. Printed 3/28/2017 HydroCAD®9.10 s/n 07054 ©2011 HydroCAD Software Solutions LLC Page 5 Summary for Link 10: Fire Station Inflow Area= 7.159 ac, 46.69% Impervious, Inflow Depth > 1.28" for 2yr event Inflow = 3.15 cfs @ 12.10 hrs, Volume= 0.762 af Primary = 3.15 cfs @ 12.10 hrs, Volume= 0.762 af, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Witmer Pond Post-Dev - As-Built Type 1124-hr 10yr Rainfall=5.55" Prepared by Shimp Engineering, P.C. Printed 3/28/2017 HydroCAD®9.10 s/n 07054 ©2011 HydroCAD Software Solutions LLC Pape 6 Summary for Subcatchment 3: Dominion Crane Runoff = 9.96 cfs @ 11.97 hrs, Volume= 0.475 af, Depth> 3.57" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.55" Area (sf) CN Description 38,760 98 Impervious 30,714 61 >75% Grass cover, Good, HSG B 69,474 82 Weighted Average 30,714 44.21% Pervious Area 38,760 55.79% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.9 Direct Entry, Summary for Subcatchment 5: Site Runoff = 36.34 cfs @ 11.96 hrs, Volume= 1.663 af, Depth> 3.37" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.55" Area (sf) CN Description 135,573 98 Impervious 122,116 61 >75% Grass cover, Good, HSG B 257,689 80 Weighted Average - 122,116 -47.39% Pervious Area 135,573 52.61% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (fUft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Subcatchment 7: Galaxie Residue Runoff = 4.11 cfs @ 12.00 hrs, Volume= 0.210 af, Depth> 1.71" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.55" Area (sf) CN Description 64,445 61 >75%Grass cover, Good, HSG B 64,445 100.00% Pervious Area Witmer Pond Post-Dev - As-Built Type 1124-hr 10yr Rainfall=5.55" Prepared by Shimp Engineering, P.C. Printed 3/28/2017 HydroCAD®9.10 s/n 07054 ©2011 HydroCAD Software Solutions LLC Page 7 Tc "Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Summary for Subcatchment 9: ACSA Bypass Runoff = 3.57 cfs @ 12.08 hrs, Volume= 0.235 af, Depth> 2.27" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.55" Area (sf) CN Description 44,130 61 >75% Grass cover, Good, HSG B * 10,008 98 Impervious 54,138 68 Weighted Average 44,130 81.51% Pervious Area 10,008 18.49% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.5 Direct Entry, Summary for Pond 6: Biofilter • Inflow Area= 5.916 ac, 52.61% Impervious, Inflow Depth > 3.37" for 10yr event Inflow = 36.34 cfs @ 11.96 hrs, Volume= 1.663 af Outflow = 7.43 cfs @ 12.11 hrs, Volume= 1.493 af, Atten= 80%, Lag= 8.7 min Primary = 4.90 cfs @ 12.11 hrs, Volume= 1.220 af Secondary= 2.53 cfs @ 12.11 hrs, Volume= 0.272 af Tertiary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 543.42' @ 12.11 hrs Surf.Area= 11,820 sf Storage= 33,035 cf Plug-Flow detention time= 129.7 min calculated for 1.493 af (90% of inflow) Center-of-Mass det. time= 78.0 min ( 890.6 - 812.6 ) Volume Invert Avail.Storage Storage Description #1 540.00' 67,875 cf Custom Stage Data(Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 540.00 7,430 0 0 , 542.00 10,078 17,508 17,508 544.00 12,535 22,613 40,121 546.00 15,219 27,754 67,875 Witmer Pond Post-Dey- As-Built Type /124-hr 10yr Rainfall=5.55" Prepared by Shimp Engineering, P.C. Printed 3/28/2017 HydroCAD®9.10 s/n 07054 ©2011 HydroCAD Software Solutions LLC Page 8 Device Routing Invert Outlet Devices #1 Primary 540.00' 15.0" Round STR-6 thru STR-5 L= 50.0' Ke= 0.400 Inlet/Outlet Invert= 540.00'/538.00' S= 0.0400 '/' Cc= 0.900 n= 0.011 #2 Device 1 540.60' 7.0"W z 7.0" H Vert.STR-6 Orifice C= 0.600 #3 Device 1 542.00' 0.7' long STR-6 Weir 2 End Contraction(s) #4 Device 1 543.50' 36.0" Horiz.STR-6 Top X 0.74 C= 0.600 Limited to weir flow at low heads #5 Tertiary 544.10' 12.0' long (Profile 30) Emergency Spillway Head (feet) 0.49 0.98 1.48 Coef. (English) 3.80 3.86 3.86 #6 Secondary 540.00' 18.0" Round STR-20 thru STR-21 L= 50.0' Ke= 0.400 Inlet/Outlet Invert= 540.00'/538.00' S= 0.0400 '/' Cc= 0.900 n= 0.011 #7 Device 6 540.90' 3.0" Vert. STR-20 Orifice C= 0.600 #8 Device 6 542.10' 0.7' long STR-20 Weir 2 End Contraction(s) #9 Primary 543.60' 36.0" Horiz. STR-20 Top X 0.74 C= 0.600 Limited to weir flow at low heads rimary OutFlow Max=4.90 cfs @ 12.11 hrs HW=543.42' TW=0.00' (Dynamic Tailwater) =STR-6 thru STR-5 (Passes 4.90 cfs of 10.58 cfs potential flow) -2=STR-6 Orifice (Orifice Controls 2.60 cfs @ 7.65 fps) -3=STR-6 Weir (Weir Controls 2.30 cfs @ 3.89 fps) -4=STR-6 Top ( Controls 0.00 cfs) -9=STR-20 Top ( Controls 0.00 cfs) econdary OutFlow Max=2.52 cfs @ 12.11 hrs HW=543.42' TW=0.00' (Dynamic Tailwater) =STR-20 thru STR-21; (Passes 2.52 cfs of 14.89 cfs potential flow) 7=STR-20 Orifice (Orifice Controls 0.37 cfs @ 7.45 fps) =STR-20 Weir (Weir Controls 2.16 cfs @ 3.75 fps) Tertiary OutFlow Max=0.00 cfs @ 0.00 hrs HW=540.00' (Free Discharge) =Emergency Spillway ( Controls 0.00 cfs) Summary for Link 4: Cale Inflow Area= 1.595 ac, 55.79% Impervious, Inflow Depth > 3.57" for 10yr event Inflow = 9.96 cfs @ 11.97 hrs, Volume= 0.475 af Primary = 9.96 cfs @ 11.97 hrs, Volume= 0.475 af, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Summary for Link 8: Frazier Inflow Area= 1.479 ac, 0.00% Impervious, Inflow Depth > 3.91" for 10yr event Inflow = 6.25 cfs @ 12.02 hrs, Volume= 0.483 af Primary = 6.25 cfs @ 12.02 hrs, Volume= 0.483 af, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Witmer Pond Post-Dev - As-Built Type 1124-hr 10yr Rainfall=5.55" Prepared by Shimp Engineering, P.C. Printed 3/28/2017 HydroCAD®9.10 s/n 07054 ©2011 HydroCAD Software Solutions LLC Page 9 Summary for Link 10: Fire Station Inflow Area = 7.159 ac, 46.69% Impervious, Inflow Depth > 2.44" for 10yr event Inflow = 8.47 cfs @ 12.09 hrs, Volume= 1.455 af Primary = 8.47 cfs @ 12.09 hrs, Volume= 1.455 af, Atten= 0%, Lag= 0.0 min Primary outflow=Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Witmer Pond Post-Dev - As-Built Type 1124-hr 25yr Rainfall=6.83" Prepared by Shimp Engineering, P.C. Printed 3/28/2017 HydroCAD®9.10 s/n 07054 ©2011 HydroCAD Software Solutions LLC Pape 10 Summary for Subcatchment 3: Dominion Crane Runoff = , 13.05 cfs @ 11.97 hrs, Volume= 0.631 af, Depth> 4.75" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 25yr Rainfall=6.83" Area (sf) CN Description * 38,760 98 Impervious 30,714 61 >75% Grass cover, Good, HSG B 69,474 82 Weighted Average 30,714 44.21% Pervious Area 38,760 55.79% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.9 Direct Entry, Summary for Subcatchment 5: Site Runoff = 48.10 cfs @ 11.96 hrs, Volume= 2.235 af, Depth> 4.53" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 25yr Rainfall=6.83" Area (sf) CN Description * 135,573 98 Impervious 122,116 61 >75% Grass cover, Good, HSG B 257,689 80 Weighted Average 122,116 47.39% Pervious Area 135,573 52.61% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Subcatchment 7: Galaxie Residue Runoff = 6.31 cfs @ 12.00 hrs, Volume= 0.317 af, Depth> 2.57" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 25yr Rainfall=6.83" Area (sf) CN Description 64,445 61 >75% Grass cover, Good, HSG B 64,445 100.00% Pervious Area Witmer Pond Post-Dev - As-Built Type 1124-hr25yr Rainfall=6.83" Prepared by Shimp Engineering, P.C. Printed 3/28/2017 HydroCAD®9.10 s/n 07054 ©2011 HydroCAD Software Solutions LLC Page 11 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Summary for Subcatchment 9: ACSA Bypass Runoff = 5.18 cfs @ 12.08 hrs, Volume= 0.338 af, Depth> 3.26" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 25yr Rainfall=6.83" Area (sf) CN Description 44,130 61 >75% Grass cover, Good, HSG B 10,008 98 Impervious 54,138 68 Weighted Average 44,130 81.51% Pervious Area 10,008 18.49% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.5 Direct Entry, Summary for Pond 6: Biofilter Inflow Area= 5.916 ac, 52.61% Impervious, Inflow Depth > 4.53" for 25yr event Inflow = 48.10 cfs @ 11.96 hrs, Volume= 2.235 af Outflow = 21.83 cfs @ 12.05 hrs, Volume= 2.054 af, Atten= 55%, Lag= 5.4 min Primary = 18.33 cfs @ 12.05 hrs, Volume= 1.671 af Secondary= 3.50 cfs @ 12.05 hrs, Volume= 0.383 af Tertiary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 544.04' @ 12.05 hrs Surf.Area= 12,587 sf Storage= 40,612 cf Plug-Flow detention time= 111.9 min calculated for 2.054 af (92% of inflow) Center-of-Mass det. time= 69.1 min ( 873.4- 804.2) Volume Invert Avail.Storaqe Storage Description #1 540.00' 67,875 cf Custom Stage Data(Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store meet) (sq-ft) (cubic-feet) (cubic-feet) 540.00 7,430. 0 0 542.00 10,078 17,508 17,508 544.00 12,535 22,613 40,121 546.00 15,219 27,754 67,875 • Witmer Pond Post-Dev - As-Built Type 1124-hr 25yr Rainfall=6.83" Prepared by Shimp Engineering, P.C. Printed 3/28/2017 HydroCAD®9.10 sin 07054 ©2011 HydroCAD Software Solutions LLC Page 12 Device Routing Invert Outlet Devices #1 Primary 540.00' 15.0" Round STR-6 thru STR-5 L= 50.0' Ke= 0.400 Inlet/Outlet Invert= 540.00'/538.00' S= 0.0400 '/' Cc= 0.900 n= 0.011 #2 Device 1 540.60' 7.0"W x 7.0" H Vert. STR-6 Orifice C= 0.600 #3 Device 1 542.00' 0.7' long STR-6 Weir 2 End Contraction(s) #4 Device 1 543.50' 36.0" Horiz. STR-6 Top X 0.74 C= 0.600 Limited to weir flow at low heads #5 Tertiary 544.10' 12.0' long (Profile 30) Emergency Spillway Head (feet) 0.49 0.98 1.48 Coef. (English) 3.80 3.86 3.86 #6 Secondary 540.00' 18.0" Round STR-20 thru STR-21 L= 50.0' Ke= 0.400 Inlet/Outlet Invert= 540.00'/538.00' S= 0.0400 '/' Cc= 0.900 n= 0.011 #7 Device 6 540.90' 3.0"Vert.STR-20 Orifice C= 0.600 #8 Device 6 542.10' 0.7' long STR-20 Weir 2 End Contraction(s) #9 Primary 543.60' 36.0" Horiz. STR-20 Top X 0.74 C= 0.600 Limited to weir flow at low heads trimary OutFlow Max=18.32 cfs @ 12.05 hrs HW=544.04' TW=0.00' (Dynamic Tailwater) -1=STR-6 thru STR-5 (Inlet Controls 11.70 cfs @ 9.53 fps) -2=STR-6 Orifice (Passes < 2.91 cfs potential flow) -3=STR-6 Weir (Passes <3.33 cfs potential flow) -4=STR-6 Top (Passes < 9.01 cfs potential flow) -9=STR-20 Top (Weir Controls 6.62 cfs @ 1.60 fps) econdary OutFlow Max=3.50 cfs @ 12.05 hrs HW=544.04' TW=0.00' (Dynamic Tailwater) =STR-20 thru STR-21 (Passes 3.50 cfs of 16.53 cfs potential flow) 7=STR-20 Orifice (Orifice Controls 0.41 cfs @ 8.36 fps) 8=STR-20 Weir (Weir Controls 3.09 cfs @ 4.55 fps) ertiary OutFlow Max=0.00 cfs @ 0.00 hrs HW=540.00' (Free Discharge) =Emergency Spillway ( Controls 0.00 cfs) Summary for Link 4: Cale Inflow Area = 1.595'ac, 55.79% Impervious, Inflow Depth > 4.75" for 25yr event Inflow = 13.05 cfs @ 11.97 hrs, Volume= 0.631 af Primary = 13.05 cfs @ 11.97 hrs, Volume= 0.631 af, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Summary for Link 8: Frazier Inflow Area = ' 1.479ac, 0.00% Impervious, Inflow Depth > 5.68" for 25yr event Inflow = 9.56 cfs @ 12.01 hrs, Volume= 0.701 af • Primary = 9.56 cfs @ 12.01 hrs, Volume= 0.701 af, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Witmer Pond Post-Dev - As-Built Type 1124-hr 25yr Rainfall=6.83" Prepared by Shimp Engineering, P.C. Printed 3/28/2017 HydroCAD®9.10 sin 07054 ©2011 HydroCAD Software Solutions LLC Page 13 Summary for Link 10: Fire Station Inflow Area= 7.159 ac, 46.69% Impervious, Inflow Depth > 3.37" for 25yr event Inflow = 23.36 cfs @ 12.05 hrs, Volume= 2.008 of Primary = 23.36 cfs @ 12.05 hrs, Volume= 2.008 af, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs • Witmer Pond Post-Dev - As-Built Type 1124-hr 100yr Rainfall=9.13" Prepared by Shimp Engineering, P.C. Printed 3/28/2017 HydroCAD®9.10 s/n 07054 ©2011 HydroCAD Software Solutions LLC Paae 14 Summary for Subcatchment 3: Dominion Crane Runoff = 18.60 cfs @ 11.97 hrs, Volume= 0.921 af, Depth> 6.93" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.13" Area (sf) CN Description 38,760 98 Impervious 30,714 61 >75% Grass cover, Good, HSG B 69,474 82 Weighted Average 30,714 44.21% Pervious Area 38,760 55.79% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.9 Direct Entry, Summary for Subcatchment 5: Site Runoff = 69.31 cfs @ 11.96 hrs, Volume= 3.295 af, Depth> 6.68" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.13" • Area (sf) CN Description 135,573 98 Impervious 122,116 61 >75% Grass cover, Good, HSG B 257,689 80 Weighted Average 122,116 47.39% Pervious Area 135,573 52.61% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft). (ft/sec) (cfs) 5.0 Direct Entry, Summary for Subcatchment 7: Galaxie Residue Runoff = 10.63 cfs @ 12.00 hrs, Volume= 0.532 af, Depth> 4.32" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.13" Area (sf) CN Description 64,445 61 >75% Grass cover, Good, HSG B 64,445 100.00% Pervious Area Witmer Pond Post-Dev - As-Built Type 1124-hr 100yr Rainfall=9.13" Prepared by Shimp Engineering, P.C. Printed 3/28/2017 HydroCAD®9.10 s/n 07054 ©2011 HydroCAD Software Solutions LLC Page 15 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Summary for Subcatchment 9: ACSA Bypass Runoff = 8.24 cfs @ 12.07 hrs, Volume= 0.536 af, Depth> 5.18" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01, hrs Type II 24-hr 100yr Rainfall=9.13" Area (sf) CN Description 44,130 61 >75% Grass cover, Good, HSG B * 10,008 98 Impervious 54,138 68 Weighted Average 44,130 81.51% Pervious Area 10,008 18.49% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.5 Direct Entry, Summary for Pond 6: Biofilter Inflow Area = 5.916 ac, 52.61% Impervious, Inflow Depth > 6.68" for 100yr event Inflow = 69.31 cfs @ 11.96 hrs, Volume= 3.295 af Outflow = 55.27 cfs @ 12.01 hrs, Volume= 3.100 af, Atten= 20%, Lag= 2.9 min Primary = 34.91 cfs @ 12.01 hrs, Volume= 2.432 af Secondary= 4.93 cfs @ 12.01 hrs, Volume= 0.532 af Tertiary = 15.42 cfs @ 12.01 hrs, Volume= 0.136 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev. 544.59' @ 12.01 hrs Surf.Area= 13,321 sf Storage= 47,690 cf Plug-Flow detention time= 91.9 min calculated for 3.099 af (94%of inflow) Center-of-Mass det. time= 58.6 min ( 851.9 - 793.3 ) Volume Invert Avail.Storage Storage Description #1 540.00' 67,875 cf Custom Stage Data(Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 540.00 7,430 0 0 542.00 10,078 17,508 17,508 544.00 12,535 22,613 40,121 546.00 15,219 27,754 67,875 Witmer Pond Post-Dev - As-Built Type 1124-hr 100yr Rainfall=9.13" Prepared by Shimp Engineering, P.C. Printed 3/28/2017 HydroCAD®9.10 s/n 07054 ©2011 HydroCAD Software Solutions LLC Paae 16 Device Routing Invert Outlet Devices #1 Primary 540.00' 15.0" Round STR-6 thru STR-5 L= 50.0' Ke= 0.400 Inlet/Outlet Invert= 540.00'/538.00' S= 0.0400 '/' Cc= 0.900 n= 0.011 #2 Device 1 540.60' 7.0"W x 7.0" H Vert.STR-6 Orifice C= 0.600 #3 Device 1 542.00' 0.7' long STR-6 Weir 2 End Contraction(s) #4 Device 1 543.50' 36.0" Horiz.STR-6 Top X 0.74 C= 0.600 Limited to weir flow at low heads #5 Tertiary 544.10' 12.0' long (Profile 30) Emergency Spillway Head (feet) 0.49 0.98 1.48 Coef. (English) 3.80 3.86 3.86 #6 Secondary 540.00' 18.0" Round STR-20 thru STR-21 L= 50.0' Ke= 0.400 Inlet/Outlet Invert= 540.00'/538.00' S= 0.0400 '/' Cc= 0.900 n= 0.011 #7 Device 6 540.90' 3.0" Vert.STR-20 Orifice C= 0.600 #8 Device 6 542.10' 0.7' long STR-20 Weir 2 End Contraction(s) #9 Primary 543.60' 36.0" Horiz. STR-20 Top X 0.74 C= 0.600 Limited to weir flow at low heads rimary OutFlow Max=34.85 cfs @ 12.01 hrs HW=544.58' TW=0.00' (Dynamic Tailwater) =STR-6 thru STR-5 (Inlet Controls 12.60 cfs @ 10.26 fps) -2=STR-6 Orifice (Passes <3.15 cfs potential flow) -3=STR-6 Weir (Passes < 4.75 cfs potential flow) -4=STR-6 Top (Passes < 25.73 cfs potential flow) -9=STR-20 Top (Weir Controls 22.26 cfs @ 2.40 fps) econdary OutFlow Max=4.93 cfs @ 12.01 hrs HW=544.58' TW=0.00' (Dynamic Tailwater) STR-20 thru STR-21 (Passes 4.93 cfs of 17.85 cfs potential flow) 7=STR-20 Orifice (Orifice Controls 0.45 cfs @ 9.08 fps) =STR-20 Weir (Weir Controls 4.48 cfs @ 5.15'fps) Tertiary OutFlow Max=15.35 cfs @ 12.01 hrs HW=544.58' (Free Discharge) t-5=Emergency Spillway (Weir Controls 15.35 cfs @ 2.64 fps) Summary for Link 4: Cale Inflow Area= 1.595 ac, 55.79% Impervious, Inflow Depth.> 6.93" for 100yr event Inflow = 18.60 cfs @ 11.97 hrs, Volume= 0.921 af Primary = 18.60 cfs @ 11.97 hrs, Volume= 0.921 af, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Summary for Link 8: Frazier Inflow Area= 1.4791ac, 0.00% Impervious, Inflow Depth > 8.63" for 100yr event Inflow = 15.55 cfs @ 12.00 hrs, Volume= 1.064 af Primary = 15.55 cfs @ 12.00 hrs, Volume= 1.064 af, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Witmer Pond Post-Dev - As-Built Type 1124-hr 100yr Rainfall=9.13" Prepared by Shimp Engineering, P.C. Printed 3/28/2017 HydroCAD®9.10 s/n 07054 ©2011 HydroCAD Software Solutions LLC Page 17 Summary for Link 10: Fire Station Inflow Area= 7.159 ac, 46.69% Impervious, Inflow Depth> 4.98" for 100yr event Inflow = 41.96 cfs @ 12.01 hrs, Volume= 2.968 af Primary = 41.96 cfs @ 12.01 hrs, Volume= 2.968 af, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs