J_2024 05 09_West Orange Stormwater Management Plan

Post Development West Orange B_03 01 12 Prepared by TRC Engineers, Inc. HydroCAD® 9.10 s/n 06401 © 2009 HvdroCAD Software Solutions LLC Type III 24-hr 10 yr Rainfall=5.21" Printed 3/14/2012 Page 27 Summary for Subcatchment 9A: PO-DA 9A Runoff = 2.69 cfs @ 12.38 hrs, Volume= 0.334 af, Depth= 3.62" 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 10 yr Rainfall=5.21" * ★ * Area (sf) CN Description 650 98 Impervious, HSG D 1,367 98 Gravel road, HSG D 46,220 85 Yard stone, HSG D 48,237 86 Weighted Average 46,220 85 95.82% Pervious Area 2,017 98 4.18% Impervious Area Tc (min) 21.7 Length (feet) 100 2.5 Slope Velocity Capacity (ft/ft) (ft/sec) (cfs) 0.0070 0.08 Description 190 0.0060 1.25 4.3 130 0.0010 0.51 Shallow Concentrated Flow, Yard Stone Unpaved Kv= 16.1 fps Shallow Concentrated Flow, Yard Stone Unpaved Kv= 16.1 fps 28.5 420 Total Sheet Flow, Yard Stone n= 0.250 P2= 3.42" Subcatchment 9A: PO-DA 9A Hydrograph 2.69 Cfs —i—nam—— — i------ Type III 24-hr 10 yr Rainfall=5.21" Runoff Area=48,237 sf Runoff Volume=0.334 af Runoff Depth=3.62" Flow Length=420' y Tc=28.5 min CN=85/98 mmm 0 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) \wmw

Post Development West Orange B_03 01 12 Type III 24-hr 10 yr Rainfall=5.21" Prepared by TRC Engineers, Inc. HvdroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Printed 3/14/2012 Page 28 Summary for Subcatchment 9C: PO-DA 9C Runoff = 4.13 cfs @ 12.20 hrs, Volume= 0.412 af, Depth= 4.09" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 10 yr Rainfall=5.21" Area (sf) CN Description 1,117 98 Impervious, HSG D 98 Gravel road, HSG D 18,457 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 ★ * it Tc (min) 12.6 Length (feet) 100 Slope Velocity Capacity (ft/ft) (ft/sec) (cfs) 0.0270 0.13 Description 1.1 160 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 Sheet Flow, Yard Stone n= 0.250 P2= 3.42" Unpaved Kv= 16.1 fps Unpaved Kv= 16.1 fps Subcatchment 9C: PO-DA 9C Hydrograph i i iiii 4.13 cfs — _ 1 1 1 C2 0 1 2 3 4 56 7 8 i i—i---------- r i Type III 24-hr 10 yr i ; Rainfall=5.21M unoff Area=52,660 sf R Run loff Volume=0,412 af Runoff Depth=4.09" FI6W Len^th4380; Tc-15Ldrriiri i ! ! : i CN=85/98 i r« 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Tima (hours) f

Post Development West Orange B_03 01 12 Type III 24-hr 10 yr Rainfall=5.21" Prepared by TRC Engineers, Inc. HvdroCAD® 9.10 s/n 06401 © 2009 HvdroCAD Software Solutions LLC Printed 3/14/2012 Page 29 Summary for Pond MH-1: MH1 to MH4 [57] Hint: Peaked at 605.29' (Flood elevation advised) 0.591 ac, 64.11% Impervious, Inflow Depth = 4.58" for 10 yr event 2.87 cfs @ 12.08 hrs, Volume= 0.225 af 2.87 cfs @ 12.08 hrs, Volume= 0.225 af, Atten= 0%, Lag= 0.0 min 2.87 cfs @ 12.08 hrs, Volume= 0.225 af 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= 605.29' @ 12.12 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 V Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior Primary OutFlow Max=2.72 cfs @ 12.08 hrs HW=604.43' TW=603.91' (Dynamic Tailwater) 1=Culvert (Inlet Controls 2.72 cfs @ 3.46 fps) Pond MH-1: MH1 to MH4 Hydrograph I ?»7.r.fsJ 2.87 cfs 7 ■ Inflow a Primary Inflow Area=0.591 ac Peak Elev=605.29' U 12.0" Round Culvert n=0.020 ^ L=15 O' S=0.066 itlifl» 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) i•irii

Post Development West Orange B_03 01 12 Type III 24-hr 10 yr Rainfall=5.21" Prepared by TRC Engineers, Inc. HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Printed 3/14/2012 Page 30 Summary for Pond MH-2: MH-2 to MH-3 [57] Hint: Peaked at 606.92' (Flood elevation advised) Inflow Area = Inflow = Outflow = Primary = 0.916 ac, 24.39% Impervious, Inflow Depth = 3.47" for 10 yr event 3.04 cfs @ 12.15 hrs, Volume3 0.265af 3.04 cfs @ 12.15 hrs, Volume3 0.265 af, Atten=0%, Lag= 0.0 min 3.04 cfs @ 12.15 hrs, Volume3 0.265af Routing by Dyn-Stor-Ind method, Time Span3 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 606.92’ @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' S= 0.0235 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior Primary OutFlow Max=3.08 cfs @ 12.15 hrs HW=606.87' TW=605.90' (Dynamic Tailwater) 1=Culvert (Outlet Controls 3.08 cfs @ 3.92 fps) Pond MH-2: MH-2 to MH-3 Hydrograph Iii I 3 04 r.f< 3.04 cfs 3- I---- f - 2 5 o iff --- h: - I------t - lit 1*1 01 rrm i rrp rri|vn Tn 234 7 8 9 10 11 l Innow | Primary | I I I P j .1— a —i _ Inflow Area=0.916 ac PeakElev-606.92; i i i I I i —1 —I— - t i - 4-- 1 — i2.0' i-l— -i Round Culvert i i i i n=0.020 i i i i i i i t L=34 O' S=0.0235 •/*7 i . .j i i i i i i i i i i m i|1 n i|1iii|1 ii iftni|nn|1n ni n i[i iu|1 n i|1 n ij¥(W| 13 14 15 18 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 10 yr Rainfall=5.21" Prepared by TRC Engineers, Inc. Printed 3/14/2012 HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Page 31 Summary for Pond MH-3: MH-3 to MH-4 [57] Hint: Peaked at 606.03’ (Flood elevation advised) 0.916 ac, 24.39% Impervious, Inflow Depth = 3.47" for 10 yr event 3.04 cfs@ 12.15 hrs, Volume= 0.265 af 3.04 cfs@ 12.15 hrs, Volume= 0.265 af, Atten= 0%, Lag= 0.0 min 3.04 cfs @ 12.15 hrs, Volume= 0.265 af 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= 606.03' @ 12.13 hrs Device Routing #1 Primary Invert Outlet Devices 603.20' 12.0" Round Culvert L= 50.0' Ke= 0.500 Inlet / Outlet Invert* 603.20' / 602.20' S= 0.0200 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior Primary OutFlow Max=3.16 cfs @ 12.15 hrs HW=605.90' TW=604.59' (Dynamic Tailwater) ^-1=Culvert (Outlet Controls 3.16 cfs @ 4.02 fps) Pond MH-3: MH-3 to MH-4 Hydrograph ■ Inflow I B Primary | 3.04 c % —2 0 1 2 3 4 5 6 7 '4 4 '4 Inflow Area=0.916 ac Peak Elev=606.03’ LLL-LLii i2.om Round Culvert n=0.02Q LUii L=50.0' : i S=0.0200 V 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 10 yr Rainfall=5.21" Prepared by TRC Engineers, Inc. HvdroCAD® 9,10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Printed 3/14/2012 Page 32 Summary for Pond MH-4: MH4 to MH5 [57] Hint: Peaked at 604.78' (Flood elevation advised) Inflow Area = Inflow = Outflow = Primary = 1.507 ac, 39.97% Impervious, Inflow Depth = 3.90" for 10 yr event 5.58 cfs @ 12.11 hrs, Volume= 0.490 af 5.58 cfs@ 12.11 hrs, Volume= 0.490 af, Atten= 0%, Lag= 0.0 min 5.58 cfs @ 12.11 hrs, Volume= 0.490 af \ Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 604.78' @ 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=5.03 cfs @ 12.11 hrs HW=604.65' TW=603.99' (Dynamic Tailwater) ^-1=Culvert (Outlet Controls 5.03 cfs @ 2.84 fps) Pond MH-4: MH4 to MH5 Hydrograph L _ J ------------I _ _ t ----------i ------- L _ l 5 g;a r 5.58 cfs - 4. - - _ J _ __ __ _ I l I Inflow I I Primary | Inflow Area=1.507 ac Peak Elev=604.78' i iii i i i i ------i - - 4 ----------1 - - I -I ------I ----- 4 - 4 I I I I I I I I I I i8.0’ Round Culvert n=0.02Q L-85.0* S=0.0271 7 —i — — i— ♦- s3 r- —i— <— r —» — r mm. m , finii|TrT7p l ii l if»iN^iiip iiTj11 up i m | i i i i|i n nnif|i ni| & ntriri I II [rni|nii|iiii|iiiniimiiinnii|iin|iiii|iiii|iimriii|irrnlTnTTrTiiTTnfTii 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 Tima (hours)

Post Development West Orange B_03 01 12 Prepared byTRC Engineers, Inc. Type III 24-hr 10 yr Rainfall=5.21" Printed 3/14/2012 Page 33 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 604.07' (Flood elevation advised) 2.236 ac, 43.09% Impervious, Inflow Depth = 3.92" for 10 yr event 8.64 cfs @ 12.10 hrs, Volume= 0.731 af 8.64 cfs @ 12.10 hrs, Volume= 0.731 af,Atten= 0%, Lag= 0.0 min 8.64 cfs@ 12.10 hrs, Volume= 0.731 af 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= 604.07' @ 12.12 hrs Device Routing #1 Primary 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 ’/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior Primary OutFlow Max=8.55 cfs @12.10 hrs HW=603.81' TW=602.23' (Dynamic Tailwater) 1=Culvert (Outlet Controls 8.55 cfs @ 4.84 fps) Pond MH-5: MH 5 to MH 6 Hydrograph ■ Inflow I ■ Primary I 1 ft.64r.fsj 8.64 cfs j. _ j Inflow Area=2.236 ac Peak Elev=604.07' 18.0" — Round Culvert n=0.020 4 L=66.0' S=0.0348'/' 5 01 i i|l i i i|i 11 1 |l ii i |i11 1 |l n i|'ii n |t mirrrnnrrfi n i|i nliTTi i |> m ip n !Wf<V 2 3 4 5 89 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 10 yr Rainfall=5.21" Prepared by TRC Engineers, Inc. HvdroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Printed 3/14/2012 Page 34 Summary for Pond MH-6: MH 6 to MH 11 [57] Hint: Peaked at 602.60' (Flood elevation advised) Inflow Area = Inflow = Outflow = Primary = 5.076 ac, 24.87% Impervious, Inflow Depth = 3.61'' for 10 yr event 15.72 cfs @ 12.14 hrs, Volume= 1.527 af 15.72 cfs @ 12.14 hrs, Volume= 1.527 af, Atten= 0%, Lag= 0.0 min 15.72 cfs @ 12.14 hrs, Volume3 1.527 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 602.60' @ 12.14 hrs Device Routing #1 Primary Invert Outlet Devices 597.60' 18.0" Round Culvert L= 45.0' Ke= 0.500 Inlet / Outlet Invert3 597.60' / 596.50' S= 0.0244 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior Primary OutFlow Max=15.71 cfs @ 12.14 hrs HW=602.60' TW=598.37' (Dynamic Tailwater) 1=Culvert (Outlet Controls 15.71 cfs @ 8.89 fps) Pond MH-6: MH 6 to MH 11 Hydrograph I Inflow | I Primary | 15 7? r.f. 15.72 Cfs 16- low Area=5.076 ac Peak rEl0v=6O2.6<r . - L 1514: 22 2 13- I I r~t~i 12 -. Round Culvert n=0.020 L=45. S=0.0244 • 7II a 10. ■ i i i i i i i i — ; i— t- —i —i—i—. ‘ r i » I i i i i .J _ _ L _ 1 ________ 1 ____ • ____ I ____ I ____ J ____ A 0" 5- ■i r _ i T - A ~ "I t i i i i i r ' t " i i i 1- % 4 m i|1iii|iiii|)iii|liii|iiii|>iii|liiihiii|liii|1ni|liii|iin|iiii|WWT>WfHWHitwjHWr m 56 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. Type III 24-hr 10yr Rainfall=5.21" Printed 3/14/2012 HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Page 35 Summary for Pond MH-7: MH-7 to MH-11 [57] Hint: Peaked at 598.37' (Flood elevation advised) Inflow Area = Inflow = Outflow = Primary = 5.076 ac, 24.87% Impervious, Inflow Depth = 3.61" for 10 yr event 15.72 cfs @ 12.14 hrs, Volume= 1.527 af 15.72 cfs @ 12.14 hrs, Volume= 1.527 af, Atten= 0%, Lag= 0.0 min 15.72 cfs @ 12.14 hrs, Volume= 1.527 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 598.37' @ 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= 0.0103 '/' Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior Primary OutFlow Max=15.71 cfs @ 12.14 hrs HW=598.37' TW=0.00' (Dynamic Tailwater) 1=Culvert (Barrel Controls 15.71 cfs @ 5.55 fps) Pond MH-7: MH-7 to MH-11 Hydrograph I Inflow I I Primary | l_15_Z2_cfsJ 15.72 Cfs 1615- 13- 12 11- 2 JJ 10- % % 6-: 5t Inflow Area=5.076 ac Peak Elev=598.37' 30.0" Round Culvert n-0.020 1=360.0* S=0.0103 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 10 yr Rainfall=5.21" Prepared by TRC Engineers, Inc. HvdroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Printed 3/14/2012 Page 36 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 [^^rimaryjj Peak Elev=0.00' i I 12.0" und Culvert n=0.020 L=74.0* S=0.0135 7' I I I I I I * 2 i l l I I l u. I I 1 0.00 c 0 I l 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 Tima (hours)