J_2024 05 09_West Orange Stormwater Management Plan

Post Development West Orange B_03 01 12 Type III 24-hr 100 yr Rainfall=8.72" Prepared by TRC Engineers, Inc. HvdroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Printed 3/14/2012 Page 47 Summary for Subcatchment 9C: PO-DA 9C Runoff = 7.43 cfs @ 12.20 hrs, Volume= 0.755 af, Depth= 7.49" 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 100 yr Rainfall=8.72" Area (sf) CN Description 98 Impervious, HSG D 1,117 18,457 98 Gravel road, HSG D 33,086 85 Yard stone, HSG D 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 Shallow Concentrated Flow, Yard Stone 15.0 380 Total n= 0.250 P2= 3.42" Unpaved Kv= 16.1 fps Unpaved Kv= 16.1 fps Subcatchment 9C: PO-DA 9C Hydrograph 7.43 cfs I -- r ? 4 0 1 2 3 4 5 6 7 8 - t Type III 24-hr 100 yr Rainfall=8.72" Runoff Area=52,660 sf Runoff Volume=0.755 af Runoff Depth=7.49" Flow Length=380* Tc-15.0 niin 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 100 yr Rainfall=8.72" Post Development West Orange B_03 01 12 Printed 3/14/2012 Prepared byTRC Engineers, Inc. Page 48 HvdroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Summary for Pond MH-1: MH1 to MH4 [57] Hint: Peaked at 624.62' (Flood elevation advised) lnflowArea= 0.591 ac, 64.11% Impervious, lnflowDepth = 8.05" for 100yrevent 0.396 af Volume= 12.08 hrs, 4.95 cfs @ = Inflow 0.396 af, Volume= 12.08 hrs, 4.95 cfs @ = Outflow 0.396 af Volume= 12.08 hrs, 4.95 cfs @ = Primary Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 624.62' @ 12.13 hrs Invert Outlet Devices 12.0" Round Culvert L= 15.0' Ke= 0.500 603.20' Inlet / Outlet lnvert= 603.20' / 602.20' S= 0.0667 ’/’ Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior Device Routing #1 Primary Primary OutFlow Max=4.40 cfs @ 12.08 hrs HW=620.34' TW=618.98' (Dynamic Tailwater) 1=Culvert (Inlet Controls 4.40 cfs @ 5.60 fps) Pond MH-1: MH1 to MH4 Hydrograph i i I __ I A 95 r.f 4.95 cfs I Inflow I j Primary | . In flow Area=0.591 ac Peak Elev=624.62' i i i i i r — F i t Round Culvert n=0.020 : ; L=15.0 S=0.0667 V I ! £u 5 2 t— 12.0 i i i I I I mm m II111111111II111|-| II ||1111111111..... .......................... II ip inp mp II ||1 II |||| Ii|i mu II ||1 m p n ip ii ||| ii i|i li i|i iiiTWTfjTftTlfTWTlWPqfifflTnfr 0 1 2 3 4 56 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) n

Post Development West Orange B_03 01 12 Prepared byTRC Engineers, Inc. Type III 24-hr 100 yr Rainfall=8.72" Printed 3/14/2012 Page 49 HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Summary for Pond MH-2: MH-2 to MH-3 [57] Hint: Peaked at 631.11' (Flood elevation advised) Inflow Area = Inflow = Outflow = Primary = 0.916 ac, 24.39% Impervious, Inflow Depth = 6.74" for 100 yr event 5.85 cfs @ 12.15 hrs, Volume= 0.515 af 5.85 cfs@ 12.15 hrs, Volume= 0.515 af, Atten= 0%, Lag3 0.0 min 5.85cfs@ 12.15 hrs, Volume= 0.515af Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 631.11'@ 12.14 hrs Device Routing #1 Primary Invert Outlet Devices 604.00' 12.0" Round Culvert L= 34.0’ Ke= 0.500 Inlet / Outlet Invert3 604.00' / 603.20’ S3 0.0235 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior Primary OutFlow Max=5.88 cfs @ 12.15 hrs HW=631.01' TW=627.50' (Dynamic Tailwater) 1=Culvert (Outlet Controls 5.88 cfs @ 7.49 fps) Pond MH-2: MH-2 to MH-3 Hydrograph Rfi.r.fsJ 5.85 cfs — Inflow Area=0.916 ac Peak Elev=631.11' 12 •.0i i"i Round Culvert n=0.020 1=34.0' S=0.0235 V t _ . _ O3 01 2 3 45 6 7 i i I ------------------------1 % I Inflow I Primary - f - -t —i — i— r I i - I I 4 ---------- 1 ____________I -------------------i -------------------i t t 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) _ j - j --------------------- ---------------

Post Development West Orange B_03 01 12 Prepared by TRC Engineers, Inc. Type III 24-hr 100 yr Rainfall=8.72" Printed 3/14/2012 Page 50 HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Summary for Pond MH-3: MH-3 to MH-4 [57] Hint: Peaked at 627.76' (Flood elevation advised) Inflow Area = Inflow = Outflow = Primary = 0.916 ac, 24.39% Impervious, Inflow Depth = 6.74" for 100 yr event 5.85 cfs @ 12.15 hrs, Volume= 0.515 af 5.85 cfs @ 12.15 hrs, Volume= 0.515 af, Atten=0%, Lag= 0.0 min 5.85 cfs @ 12.15 hrs, Volume= 0.515 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 627.76' @12.14 hrs Device Routing #1 Primary 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 Primary OutFlow Max=6.04 cfs @ 12.15 hrs HW=627.50' TW=622.71' (Dynamic Tailwater) 1=Culvert (Outlet Controls 6.04 cfs @ 7.69 fps) Pond MH-3: MH-3 to MH-4 Hydrograph 5 5.85 cfs 6- % A A 5- i i i i i i i i i i ■ i----r --i —a i1 I,, in |^. i Mi 1 . 1 |l. i M'. .i i p i . i|i in |1 ii i |i rnirii'frri ip 1 2 3 4 5 6 7 8 ii i i 12.0'f Round Culvert n=0.020 L=50.0' S=0.0200 r * 3 i i 0 ■ Inflow I II Primary | ----- L _ - 1 . --------- 1 -- ----- 1 ------ | ------- | ---------- 1 ------ 1 - m 0- i i « n i i i i i i “ t i i I - i Inflow Area=0.916 ac Peak Elev=627.76' 1g 3- i i l ii i i A | u. i 9 3 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 28 27 28 29 30 Time (hours) n

Post Development West Orange B_03 01 12 Type III 24-hr 100yr Rainfall=8.72" Prepared by TRC Engineers, Inc. Printed 3/14/2012 HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Page 51 Summary for Pond MH-4: MH4 to MH5 [57] Hint: Peaked at 623.16’ (Flood elevation advised) Inflow Area = Inflow = Outflow = Primary = 1.507 ac, 39.97% Impervious, Inflow Depth = 7.25"for 100 yr event 10.24cfs@ 12.11 hrs, Volume= 0.911 af 10.24 cfs@ 12.11 hrs, Volumes 0.911 af,Atten= 0%, Lag=0.0min 10.24cfs@ 12.11 hrs, Volume= 0.911 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 623.16’ @ 12.13 hrs Device Routing #1 Primary Invert Outlet Devices 602.20’ 18.0" Round Culvert L= 85.0’ Ke= 0.500 Inlet / Outlet lnvert= 602.20’ / 599.90’ S= 0.0271 ’/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior Primary OutFlow Max=9.17 cfs @ 12.11 hrs HW=621.82' TW=619.65' (Dynamic Tailwater) 1=Culvert (Outlet Controls 9.17 cfs @ 5.19 fps) Pond MH-4: MH4 to MH5 Hydrograph I Inflow I Primary in 2^Lcfs| n 10.24 cfs 10 Inflow Area=1.507 ac PeakElev=623.16' l i t 18 t .0 t " Round Culvert n=0.020 L-85.0' $=0.0271 T r - I III T T 9 8 7- $ 3. 6 3 i5 4 L.i-J 3- 2: 1i|in i|i irii'i ii n'nrrpTiTp n i 01 2 3 45 p r n | i i i i|i n i{^ i i t |» 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)

Post Development West Orange B_03 01 12 Type III 24-hr 100 yr Rainfall=8.72" Prepared by TRC Engineers, Inc. HvdroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Printed 3/14/2012 Page 52 Summary for Pond MH-5: MH 5 to MH 6 [57] Hint: Peaked at 620.74' (Flood elevation advised) Inflow Area = Inflow = 3 Outflow Primary = 2.236 ac, 43.09% Impervious, Inflow Depth = 7.28" for 100 yr event 15.80 cfs @ 12.10 hrs, Volume= 1.356 af 15.80 cfs@ 12.10 hrs, Volume= 1.356 af, Atten= 0%, Lag= 0.0 min 15.80 cfs @ 12.10 hrs, Volume3 1.356 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 620.74' @ 12.13 hrs Device Routing #1 Primary Invert Outlet Devices 599.90' 18.0" Round Culvert L= 66.0' Ke= 0.500 Inlet / Outlet Invert3 599.90’ / 597.60’ S= 0.0348 V Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior Primary OutFlow Max=15.56 cfs @ 12.10 hrs HW=618.88' TW3613.63' (Dynamic Tailwater) 1=Culvert (Outlet Controls 15.56 cfs @ 8.81 fps) Pond MH-5: MH 5 to MH 6 Hydrograph i—. J — -1— -l— — ------I ------- I ------- L_ _ _ _ _ _ _ I ------- 1 ------ l ------- L _ J . _ - l --------------- ±5 8£Lc£ 15.80 cfs V 16- 1413- / ■ Inflow | M Primary | l I I l Inflow Area=2.236 ac Peak ^lev=620 74’ -1 i —«— r. i 12- t T1 ' - i 18.0 Round Culvert 11----- 4- i i i i i i i i i 10- : l : n=o,o2o ----- L - J - 1 _ J __ __ __ __ _ I ____ 7- i_J_J L_1 ! i I L=66.0' S=0.0348 7' -.r - r —i —i — m in i t t r ii ■■ .1 I,t ■■ >|i iU|l II 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Tima (hours)

Post Development West Orange B_03 01 12 Type III 24-hr 100 yr Rainfall=8.72" Prepared by TRC Engineers, Inc. Printed 3/14/2012 HydroCAD® 9.10 s/n 06401 © 2009 HvdroCAD Software Solutions LLC Page 53 Summary for Pond MH-6: MH 6 to MH 11 [57] Hint: Peaked at 615.92' (Flood elevation advised) Inflow Area = Inflow = Outflow = Primary = 5.076 ac, 24.87% Impervious, Inflow Depth = 6.92" for 100 yr event 29.82 cfs @ 12.14 hrs, Volume= 2.927 af 29.82 cfs @ 12.14 hrs, Volume= 2.927 af, Atten= 0%, Lag= 0.0 min 29.82 cfs @ 12.14 hrs, Volume= 2.927 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 615.92' @ 12.14 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=29.80 cfs @ 12.14 hrs HW=615.90’ TW=600.67' (Dynamic Tailwater) 1=Culvert (Outlet Controls 29.80 cfs @ 16.86 fps) Pond MH-6: MH 6 to MH 11 Hydrograph —i-------------- 1—i—i—i—i—i—i—i—;—i—i—i—i—i— 1 t I 32- 1 OQ HO n f r 1 u 1 29.82 cfs 1 1 i 28-: — 1 • 1 1 t 1 f 1 t 1 1 I 1 1 20: L .. i 1614- 10 - 1 1 1 i i t i 3 0 1 2 3 4 56 7 8 • i i * 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) i f j ■ Inflow ■ Primary | i Inflow Area=5.076 ac Peak Elev=615.92* 18.0” Round Culvert n=0 020 L=45.0' 8=0.0244 7' l 22 - 1 1 1 I I I '

Post Development West Orange B_03 01 12 Prepared by TRC Engineers, Inc. Type III 24-hr 100 yr Rainfall=8.72" Printed 3/14/2012 HvdroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Page 54 Summary for Pond MH-7: MH-7 to MH-11 [57] Hint: Peaked at 600.68' (Flood elevation advised) Inflow Area = Inflow = Outflow = Primary = 5.076 ac, 24.87% Impervious, Inflow Depth = 6.92" for 100 yr event 29.82 cfs @ 12.14 hrs, Volume= 2.927 af 29.82 cfs @ 12.14 hrs, Volume= 2.927 af, Atten= 0%, Lag= 0.0 min 29.82 cfs @ 12.14 hrs, Volume= 2.927 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 600.68' @ 12.14 hrs Device Routing #1 Primary Invert Outlet Devices 596.50' 30.0" Round Culvert L= 360.0' Ke= 0.500 Inlet / Outlet lnvert= 596.50' / 592.80' S= 0.01037' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior Primary OutFlow Max=29.80 cfs @ 12.14 hrs HW=600.67' TW=0.00' (Dynamic Tailwater) 1=Culvert (Barrel Controls 29.80 cfs @ 6.07 fps) Pond MH-7: MH-7 to MH-11 Hydrograph i i i I___I___ ----- • ___I ---- i _ J___ '___ I L. _ 1 _ J 82 cl 29.82 cfs 32 30t 28- 26- i I I J _ _ - _ L_ !_ _ 5 18- L _ 1___1 11 14t 12 - i- - 10 - 1' % % m I Inflow Area=5.076 ac Peaktlev=600.68 30.0 Round Culvert n=0.020 , L=360.0 S=0.0103'/' I ---- f - o 18 i ■ Inflow I B Primary | i i 20- i I I i. i i 22- I _ * __ I __ 1 ____ l ___ % 1 1 1 1 |l 11111 ) 11111111 | l 11 i inr nH rp ^r n'i lii T^ ir i|S n i|1 il i|i n i| f 2 3 4 5 8 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) *

Post Development West Orange B_03 01 12 Type III 24-hr 100 yr Rainfall=8.72" Prepared by TRC Engineers, Inc. HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Printed 3/14/2012 Page 55 Summary for Pond MH-A: MH-A to MH-B [43] Hint: Has no inflow (Outflow=Zero) Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 0.00' @ 0.00 hrs Invert Outlet Devices 599.00' 12.0" Round Culvert L= 74.0’ Ke= 0.500 Inlet / Outlet lnvert= 599.00' / 598.00' S= 0.0135 '/’ Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior Device Routing #1 Primary Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=0.00’ TW=598.00' (Dynamic Tailwater) 1=Culvert ( Controls 0.00 cfs) Pond MH-A: MH-A to MH-B Hydrograph Peak Elev=0.00‘ 12 .0 " Round Culvert i n=0.020 L=74.0' S=0.0135 T s 2 0.00 cfs l o 0 12 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)

Post Development West Orange B_03 01 12 Prepared by TRC Engineers, Inc. HvdroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Type III 24-hr 100 yr Rainfall=8.72" Printed 3/14/2012 Page 56 Summary for Pond MH-B: MH-B to MH-C [57] Hint: Peaked at 628.54' (Flood elevation advised) Inflow Area = Inflow = Outflow = Primary = 1.209 ac, 37.17% Impervious, Inflow Depth = 7.49" for 100 yr event 7.43 cfs @ 12.20 hrs, Volume= 0.755 af 7.43 cfs @ 12.20 hrs, Volume= 0.755 af, Atten=0%, Lag= 0.0 min 7.43 cfs @ 12.20 hrs, Volume= 0.755 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 628.54' @ 12.20 hrs Device Routing #1 Primary Invert Outlet Devices 598.00' 12.0” Round Culvert L= 92.0' Ke= 0.500 Inlet / Outlet lnvert= 598.00’ / 597.00’ S= 0.0109 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior Primary OutFlow Max=7.43 cfs @ 12.20 hrs HW=628.50' TW=616.93' (Dynamic Tailwater) 1=Culvert (Outlet Controls 7.43 cfs @ 9.46 fps) Pond MH-B: MH-B to MH-C Hydrograph __ I _ _ .., i • . i i » * l i _ l ____ X _ __ __ _ I _ _ i ; __ __ __ I ____ L . _ . 1 I InRow | I Primary I I 7 43 r 7.43 cfs In flow Area=1.209 ac Peak Elev=628.54' V' % 12.6" Round Culvert n=0.020 ! L=92.0* S=0.0109 V S 4 & m 0 1 2 3 4 5 6 7 3 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 "I ................... . ... * l M 11 1 ............ . i |i ii h i i i i p n h i i i iT| r i ii i |' i i i i|i ii i fH wi Vn r| VM i |S n i|n Tims (hours) m m