J_2024 05 09_West Orange Stormwater Management Plan

Type III 24-hr 2 yr Rainfall=3.42" Post Development West Orange B_03 01 12 Prepared by TRC Engineers, Inc. Printed 3/14/2012 Page 7 HvdroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Subcatchment 6: PO-DA 6 Hydrograph L - i - J i i 52 BlS Type III 24-hr 2 yr Rainfall=3.42" Runoff Area=123,682 sf Runoff Volume=0.427 af Runoff Depth=1.81" . - l . - i. Flow Length=546' :: min i i I i t l T i Tc=14.3 i i i i i CN=81/98 s a 2- — 1 - 00 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours)

Type III 24-hr 2 yr Rainfall=3.42" Post Development West Orange B_03 01 12 Prepared by TRC Engineers, Inc. Printed 3/14/2012 Page 8 HvdroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Summary for Subcatchment 9A: PO-DA 9A Runoff = 1.49 cfs@ 12.39 hrs, Volume= 0.184 af, Depth= 2.00" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/lmperv., Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 2 yr Rainfall=3.42" * * * Area (sf) CN Description 650 98 Impervious, HSG D 1,367 98 Gravel road, HSG D 85 Yard stone, HSG D 46,220 86 Weighted Average 48,237 85 95.82% Pervious Area 46,220 2,017 98 4.18% Impervious Area Tc (min) 21.7 Length (feet) 100 Slope Velocity Capacity (ft/ft) (ft/sec) (cfs) 0.0070 0.08 2.5 Description Sheet Flow, Yard Stone 190 0.0060 1.25 Shallow Concentrated Flow, Yard Stone 4.3 130 0.0010 0.51 Shallow Concentrated Flow, Yard Stone 28.5 420 Total n= 0.250 P2= 3.42" Unpaved Kv= 16.1 fps Unpaved Kv= 16.1 fps Subcatchment 9A: PO-DA 9A Hydrograph :-----r rm . _ L _ . — cfs L_L„J_. ; Type III 24-hr 2 yr : Rainfall=3.42" Runoff Area=48,237 sf Runoff Volume=0.184 af Runoff Depth=2.00" Flow Length=420' j j j | j : Tc=28.5 min ! CN=85/98 rrrrrr 0 1 2 34 56 78 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours)

Type III 24-hr 2 yr Rainfall=3.42" Post Development West Orange B_03 01 12 Prepared by TRC Engineers, Inc. HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Printed 3/14/2012 Page 9 Summary for Subcatchment 9C: PO-DA 9C Runoff = 2.45 cfs@ 12.20 hrs, Volume= 0.243 af, Depth= 2.41" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/lmpen/., Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 2 yr Rainfall=3.42" * * * Area (sf) CN Description 1,117 98 Impervious, HSG D 18,457 98 Gravel road, HSG D 85 Yard stone, HSG D 33,086 52,660 90 Weighted Average 33,086 85 62.83% Pervious Area 19,574 98 37.17% Impervious Area Tc (min) 12.6 Length (feet) 100 1.1 Description Slope Velocity Capacity (ft/ft) (ft/sec) (cfs) 0.0270 0.13 Sheet Flow, Yard Stone 160 0.0220 2.39 Shallow Concentrated Flow, Yard Stone 1.3 120 0.0085 1.48 15.0 380 Total n= 0.250 P2= 3.42" Unpaved Kv= 16.1 fps Shallow Concentrated Flow, Yard Stone Unpaved Kv= 16.1 fps Subcatchment 9C: PO-DA 9C Hydrograph 2.45 l. . I - . cfs Type III 24-hr 2 yr Rainfall=3.42" i i i i i i i i i i i Runoff Area=52,660 sf Runoff Volume=0.243 af Runoff Depth=2.41" Flow Length=380’ Tc=15.0 min CN=85/98 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours)

Type III 24-hr 2 yr Rainfall=3.42" Post Development West Orange B_03 01 12 Printed 3/14/2012 Prepared by TRC Engineers, Inc. HvdroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Pane 10 Summary for Pond MH-1: MH1 to MH4 [57] Hint: Peaked at 603.93' (Flood elevation advised) Inflow Area = Inflow = Outflow = Primary = 0.591 ac, 64.11% Impervious, Inflow Depth = 2.83" for 2 yr event 1.80 cfs@ 12.08 hrs, Volume= 0.139af 1.80 cfs @ 12.08 hrs, Volume= 0.139af, 1.80 cfs @ 12.08 hrs, Volume= 0.139af Atten=0%, Lag= 0.0min Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 603.93' @ 12.08 hrs Device Routing #1 Primary Invert Outlet Devices 603.20' 12.0" Round Culvert L= 15.0' Ke= 0.500 Inlet / Outlet lnvert= 603.20’ / 602.20' S= 0.0667 T Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior Primary OutFlow Max=1.80 cfs @ 12.08 hrs HW=603.93’ TW=603.04' (Dynamic Tailwater) 1=Culvert (Inlet Controls 1.80 cfs @ 2.92 fps) Pond MH-1: MH1 to MH4 Hydrograph lftn I Inflow I j Primary | cl 1.80 cfs Inflow Area=0.591 ac Peak Elev=603.93' 12 .0 " Round Culvert n=0.020 L=15.0' S=0.0667 T i i i « i s ° i i i i i i i mm 9 10 11 12 13 14 15 18 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours)

Type III 24-hr 2 yr Rainfall=3.42" Post Development West Orange B_03 01 12 Prepared by TRC Engineers, Inc. HydroCAD® 9.10 sIn 06401 © 2009 HydroCAD Software Solutions LLC Printed 3/14/2012 Page 11 Summary for Pond MH-2: MH-2 to MH-3 [57] Hint: Peaked at 604.75' (Flood elevation advised) Inflow Area = Inflow = Outflow = Primary = 0.916 ac, 24.39% Impervious, Inflow Depth = 1.91" for 2 yr event 1.66 cfs@ 12.15 hrs, Volume= 0.146 af 1.66 cfs @ 12.15 hrs, Volume= 0.146 af, Atten= 0%, Lag= 0.0 min 1.66 cfs @ 12.15 hrs, Volume= 0.146 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 604.75' @12.15 hrs Device Routing #1 Primary Invert Outlet Devices 604.00’ 12.0" Round Culvert L= 34.0' Ke= 0.500 Inlet / Outlet Inverts 604.00' / 603.20’ S= 0.0235 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior Primary OutFlow Max=1.66 cfs @ 12.15 hrs HW=604.75' TW=603.97' (Dynamic Tailwater) 1=Culvert (Outlet Controls 1.66 cfs @ 3.65 fps) Pond MH-2: MH-2 to MH-3 Hydrograph I 1 fifi r.fs I 1.66 cfs ' 1 2 3 45 6 7 8 S Inflow B Primary Inflow Area=0.916 ac Peak k Elev=604.75' 12.0 Round Culvert n=0.020 L-34.0' S=0.0235 V 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours)

Type III 24-hr 2 yr Rainfall=3.42" Post Development West Orange B_03 01 12 Prepared by TRC Engineers, Inc. Printed 3/14/2012 Pans 12 HvdroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Summary for Pond MH-3: MH-3 to MH-4 [57] Hint: Peaked at 603.97' (Flood elevation advised) 0.916 ac, 24.39% Impervious, Inflow Depth = 1.91" for 2 yr event 0.146af 12.15 hrs, Volume= 1.66cfs@ Atten= 0%, Lag= 0.0 min 0.146 af, 12.15 hrs, Volume= 1.66 cfs @ 0.146 af 12.15 hrs, Volume= 1.66 cfs @ Inflow Area = = Inflow = Outflow = Primary Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 603.97' @12.14 hrs Invert Outlet Devices 603.20' 12.0" Round Culvert L= 50.0' Ke= 0.500 Inlet / Outlet lnvert= 603.20' / 602.20’ S= 0.0200 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior Device Routing #1 Primary Primary OutFlow Max=1.66 cfs @12.15 hrs HW=603.97' TW=603.02' (Dynamic Tailwater) 1=Culvert (Outlet Controls 1.66 cfs @ 3.56 fps) Pond MH-3: MH-3 to MH-4 Hydrograph ■ Inflow | B Primary | I 1 fifi r.fs I l .66 cfs f' Inflow Area=0.916 aq Peak Elev=6Q3.97i 12 .0 *’ Round Culvert ! n=0.D20 i ! L=50.0‘ 8=0.0200:7* i i i i i i i i i i i i i s 2 u. 0- mm I 1 2 3 4 5 6 rrlTnrlirntiTrTl mrlmiVniT wwMmz .. ■■ -I................. .. ................................................ 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours)

Type III 24-hr 2 yr Rainfall=3.42" Post Development West Orange B_03 01 12 Prepared by TRC Engineers, Inc, HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Printed 3/14/2012 Page 13 Summary for Pond MH-4: MH4 to MH5 [57] Hint: Peaked at 603.05' (Flood elevation advised) Inflow Area = Inflow = Outflow = Primary = 1.507 ac, 39.97% Impervious, Inflow Depth = 2.27" for 2 yr event 3.27 cfs@ 12.11 hrs, Volume= 0.286 af 3.27 cfs@ 12.11 hrs, Volume= 0.286 af, Atten=0%, Lag= 0.0 min 3.27 cfs@ 12.11 hrs, Volumes 0.286 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 603.05' @ 12.11 hrs Device Routing #1 Primary Invert Outlet Devices 602.20' 18.0" Round Culvert L= 85.0' Ke= 0.500 Inlet / Outlet Inverts 602.20' / 599.90' S= 0.0271 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior Primary OutFlow Max=3.26 cfs @ 12.11 hrs HW=603.05' TW=601.01' (Dynamic Tailwater) 1=Culvert (Inlet Controls 3.26 cfs @ 3.14 fps) Pond MH-4: MH4 to MH5 Hydrograph ■L3.2Z.cfsJ 3.27 cfs m / V V, y: V. ■ Inflow B Primary Inflow Area=1.507 ac Peak Elev=603.05* 18.0" Round Culvert n=0.020 L=85 O' S=0.0271 V i i i i i i i i i i t i i i 0- 1 2 Wm 3 45 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Tima (hours)

Type III 24-hr 2 yr Rainfall=3.42" Post Development West Orange B_03 01 12 Prepared by TRC Engineers, Inc. Printed 3/14/2012 Page 14 HvdroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Summary for Pond MH-5: MH 5 to MH 6 [57] Hint: Peaked at 601.02' (Flood elevation advised) Inflow Area = Inflow = Outflow = Primary = 2.236 ac, 43.09% Impervious, Inflow Depth = 2.29" for 2 yr event 5.07 cfs @ 12.10 hrs, Volume= 0.428 af 5.07 cfs @ 12.10 hrs, Volume= 0.428 af, 5.07 cfs @ 12.10 hrs, Volume= 0.428 af Atten= 0%, Lag= 0.0min Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 601.02'@ 12.10 hrs Invert Outlet Devices 599.90' 18.0" Round Culvert L= 66.0' Ke= 0.500 Inlet / Outlet lnvert= 599.90' / 597.60’ S= 0.0348 T n= 0.020 Corrugated PE, corrugated interior Device Routing #1 Primary Cc= 0.900 Primary OutFlow Max=5.07 cfs @ 12.10 hrs HW=601.02* TW=599.33' (Dynamic Tailwater) 1=Culvert (Inlet Controls 5.07 cfs @ 3.60 fps) Pond MH-5: MH 5 to MH 6 Hydrograph I Inflow | j Primary | 5.07 cfs flow Area=2.236 ac Peak;Elev=601,02' r“ ! I L 3 - i - J 1 3- 5 2 T % ii iprt rfi irip irrp rTTTTrrn 2 3 45 6 7 8 i 1. . . i 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Tims (hours) la n" --f-i- Round Culvert n=0.020 L-66J0' 5=0.0348 7 j_ % 1 I I O.U ' - n - - i — r ~ i ------------------------ t - i L _ i. _ 0 I mm m

Type III 24-hr 2 yr Rainfall=3.42" Post Development West Orange B_03 01 12 Prepared by TRC Engineers, Inc. HvdroCAD® 9.10 s/nQ6401 © 2009 HydroCAD Software Solutions LLC Printed 3/14/2012 Page 15 Summary for Pond MH-6: MH 6 to MH 11 [57] Hint: Peaked at 599.41' (Flood elevation advised) Inflow Area = Inflow = Outflow = Primary = 5.076 ac, 24.87% Impervious, Inflow Depth = 2.02" for 2 yr event 8.76 cfs@ 12.13 hrs, Volume= 0.855 af 8.76 cfs@ 12.13 hrs, Volume= 0.855 af, Atten= 0%, Lag= 0.0 min 8.76 cfs @ 12.13 hrs, Volume= 0.855 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 599.41' @12.13 hrs Device Routing #1 Primary Invert Outlet Devices 597.60' 18.0" Round Culvert L= 45.0' Ke= 0.500 Inlet / Outlet lnvert= 597.60’ / 596.50’ S= 0.0244 '/’ Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior Primary OutFlow Max=8.75 cfs @ 12.13 hrs HW=599.41' TW=597.83' (Dynamic Tailwater) 1=Culvert (Inlet Controls 8.75 cfs @ 4.95 fps) Pond MH-6: MH 6 to MH 11 Hydrograph I Inflow ] I Primary | I ft 7fi r 8.76 cfs 9- Y. Y I n 5 |u. Inflow Area-5.076 ac Peak Elev=599.41' 18.0" Round Culvert i n=0.020 1=45,0’ L S=0.0244 7* 4-------- m 0 1 2 3 4 5 5 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours)

Type III 24-hr 2 yr Rainfall=3.42" Post Development West Orange B_03 01 12 Prepared by TRC Engineers, Inc. Printed 3/14/2012 Page 16 HvdroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Summary for Pond MH-7: MH-7 to MH-11 [57] Hint: Peaked at 597.83' (Flood elevation advised) Inflow Area = Inflow = Outflow = Primary = 5.076 ac, 24.87% Impervious, Inflow Depth = 2.02" for 2 yr event 8.76 cfs @ 12.13 hrs, Volume= 0.855 af 8.76 cfs @ 12.13 hrs, Volume= 0,855 af, Atten= 0%, Lag=0.0min 8.76 cfs @ 12.13 hrs, Volume= 0.855 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 597.83' @12.13 hrs Invert Outlet Devices 596.50' 30.0" Round Culvert L= 360.0' Ke= 0.500 Inlet / Outlet lnvert= 596.50' / 592.80' S= 0.0103 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior Device Routing #1 Primary Primary OutFlow Max=8.75 cfs @ 12.13 hrs HW=597.83' TW=0.00' (Dynamic Tailwater) ^-1=Culvert (Barrel Controls 8.75 cfs @ 4.81 fps) Pond MH-7: MH-7 to MH-11 Hydrograph r T I ------1---- 1----------- 1-1-1---1---------1--- 1----- 1---1----- 1---------i--------------I 1 1 1 1 1 1 1 1 1 1 1 t 11 1 1 1 1 1 1 1 1 11 I I Inflow I 1“ - — r * i —i — ~ (— r-n *i —i — i— r* - t _ ■ I R 7 fi r. I Primaryl | 8.76 cfs flow Area=5,076 ac In Peak Elev=597.83' Li LLi LL3h<vi Round Culvert ,-LLl J-i-i n=0.020 .: L=360.0' S=0.0103T i i i i i i x - i i i % :i — 5 Tn 1 _ L _ _1 _ U _ L .. 1 _ J • i i L i i i i i i i i' r 1 |r ' i i— r - r - i * l 1 1 * i i i ** i i i : ! i 1 i i i i• 1 t I __ 1 __ L _ L _ J _ _ i 1 1 • 1 1 1 I t 11 , i i 11 11 I1 1 1 1 i i i 1 1 1 I 1 1 1 11 1 1*1 1 1I t > i i m M1 2 3 45 6 m i mi i 0 78 mm 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) m i