19910022 Ver 2_More Info Received_20170927

Kimley>>> Horn
Transmittal
Date: 09/26/2017
Project Name: Smithfield Foods
To: Jennifer Burdette
Sion
421 Fayetteville St, Suite 600
Raleigh, North Carolina 27601
TEL [phone]
FAX [phone]
Job Number: 018687000
NCDEQ — DWR 401 Buffer & Permitting
1617 Mail Service Center
Raleiqh, NC 27699-1617
Teleohone No.
We are sending these by
❑ U.S. Mail ® FedEx ❑ Hand Delivery
❑ Other
We are sending you
® Attached ❑ Under separate cover via the following items:
❑ Shop drawings ® Prints/Plans ❑ Samples ❑ Specifications ❑ Change Orders
❑ Other
Copies Date No. Description
3 1 9.26.17 Smithfield Foods Expansion- Stormwater RFI DWR #91-0022 V2
These are transmitted as checked below:
® For your use ❑ Approved as submitted ❑ Resubmit ❑ Copies for approval
❑ As requested ❑ Approved as noted ❑ Submit ❑ Copies for distribution
❑ For review and comment ❑ Returned for corrections ❑ Return ❑ Corrected prints
Copy to: file Signed: Matt Anderson, P. E.

Kimley>Morn U
MEMORANDUM C `�
1
Jeff Poupart
To: Water Quality Permitting
North Carolina Department of Environmental Quality D
Matt Anderson, P. E. S F P 2 7 2017
From: 421 Fayetteville Street #600
Raleigh, NC 27601 DEQ -WATER RESOURCES
919-677-2020 401 8 BUFF R PERMITTING
Date: 9/25/2017
Subject: Smithfield Foods Expansion — Stormwater RFI
DWR#91-0022 V2
Dear Mr. Poupart,
This memorandum will discuss the analysis and results for the stormwater underground
system and discharge velocities as requested by your letter dated September 11, 2017.
Pump Station Outlet:
Kimley-Horn analyzed the site for stormwater utilizing Bentley Pondpack V8i software. The
results of this analysis can be found as Attachment 1. Due to existing wetlands that could not
be impacted, the site was constrained and gravity drainage was not an option. An
underground detention system requiring the use of a pump to evacuate the detained
stormwater needed to be utilized. The underground detention system was designed to detain
the 25 -year storm event and to discharge at a non-erosive velocity (less the 2 ft/s). Kimley-
Horn identified a pump design with a discharge rate of 33 CFS which was used to design the
underground detention system to evacuate the storage within 5 days. Pondpack was utilized
to verify the maximum headwater depth in the underground detention system so as not to
exceed the top of pipe elevation. Inputs for the analysis used an available capacity within the
stormwater detention pipe system of 160,800 CF of storage with a maximum allowable water
surface elevation of 128.5. Results of the analysis show the maximum headwater in the
underground detention for the 25 -year storm event is 127.0.
The stormwater pump outfall will discharge into a linear pond which has an outfall located at
the north end of the stormwater pump station. The combined flow of the drainage area to the
linear pond basin and the flow attributed from the pump is 49 CFS. The 49 CFS discharge of
this linear pond was analyzed utilizing Bentley Flowmaster software. The results of the
analysis show a rip -rap pad located at the discharge point will be required due to the flow
exiting the linear pond exceeds the maximum velocity without rip -rap protection. The rip -rap
pad will widen from 10' wide (at the linear pond discharge point) to 45' wide before entering
the wetland. This will reduce the discharge velocity to less than 2 ft/s per the NCDEQ
requirement.
919-677-2000

Kimley>»Horn
Page 2
Level Spreader Outfall:
The level spreader was analyzed utilizing Bentley PondPack V8i software and Bentley
Flowmaster software. The results of this analysis can be found as Attachment 2. Pondpack
was used to analyze discharge flows from the 25 -year storm event. These flows were entered
into Flowmaster using the slope of the proposed parking field prior to entering the level
spreader. The results of the analysis show the sheet flow condition in the parking field to have
a velocity of 1.22 ft/s thus meeting the NCDEQ velocity requirement. Before the north parking
field ties back into the wetland, a 3:1 "lip" or toe slope is provided to further mitigate erosion
and capture sediment before the final outfall into the wetland area. Please refer to attachment
3 for level spreader detail.
Thank you,
�� ffl���
Matt Anderson, P.E.
Attachments:
1. Underground Detention and Pond Discharge Results
2. Level Spreader Discharge Results
3. Level Spreader Detail

V
Attachment 1
Results
Normal Depth
Pond Outfall Rip -Rap
Project Description
Flow Area
24.63
Friction Method
Manning Formula
48.34
Solve For
Normal Depth
0.51
Input Data
Top Width
48.17
Roughness Coefficient
0.069
0.33
Channel Slope
0.02100
ft/ft
Left Side Slope
3.00
ft/ft (H:V)
Right Side Slope
3.00
ft/ft (H:V)
Bottom Width
45.00
ft
Discharge
49.00
ft3/s
Results
Normal Depth
0.53
ft
Flow Area
24.63
ftz
Wetted Perimeter
48.34
ft
Hydraulic Radius
0.51
ft
Top Width
48.17
ft
Critical Depth
0.33
ft
Critical Slope
0.10138
ft/ft
Velocity
1.99
ft/s
Velocity Head
0.06
ft
Specific Energy
0.59
ft
Froude Number
0.49
ft
Flow Type
Subcritical
ft/ft
GVF Input Data
Downstream Depth
0.00
ft
Length
0.00
ft
Number Of Steps
0
GVF Output Data
Upstream Depth
0.00
ft
Profile Description
Profile Headloss
0.00
ft
Downstream Velocity
Infinity
ft/s
Upstream Velocity
Infinity
ft/s
Normal Depth
0.53
ft
Critical Depth
0.33
ft
Channel Slope
0.02100
ft/ft
Bentley Systems, Inc. Haestad Methods SolkWheg0tarMaster V8i (SELECTseries 1) [08.11.01.03]
9/21/2017 10:05:31 AM 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA [phone] Page 1 of 2

GVF Output Data
Critical Slope
Pond Outfall Ri
0.10138 ft/ft
Bentley Systems, Inc. Haestad Methods SoRiaiieS RItsrMaster V8i (SELECTseries 1) [08.11.01.03]
9/21/2017 10:05:31 AM 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA [phone] Page 2 of 2

t
Bladen County
DETENTION PIPE (OUT)
DETENTION PIPE
Linear Pond Outfall
Table of Contents
Time -Depth Curve, 25 years
Time vs. Elevation, 25 years
Pipe Volume, 25 years
Outlet Input Data, 25 years
Composite Rating Curve, 25 years
Underground Detention Discharge
Outlet Input Data, 25 years
Composite Rating Curve, 25 years
24" RCP
DETENTION PIPE
DETENTION PIPE (IN)
DETENTION PIPE (OUT)
DETENTION PIPE (IN)
Diverted Hydrograph, 25 years
Elevation -Volume -Flow Table (Pond), 25 years
Level Pool Pond Routing Summary, 25 years
Pond Routed Hydrograph (total out), 25 years
Pond Inflow Summary, 25 years
1
3
6
9
0
11
13
17
20
23
24
27

Subsection: Time -Depth Curve
Label: Bladen County
Time -Depth Curve: 25 -Year
0.0
Label
25 -Year
Start Time
0.000 hours
Increment
0.100 hours
End Time
24.000 hours
Return Event
25 years
CUMULATIVE RAINFALL (in)
Output Time Increment = 0.100 hours
Time on left represents time for first value in each row.
Time Depth Depth Depth Depth Depth
(hours) (in) (in) (in) (in) (in)
Return Event: 25 years
Storm Event: 25 -Year
0.000
0.0
0.0
0.0
0.0
0.0
0.500
0.0
0.0
0.0
0.1
0.1
1.000
0.1
0.1
0.1
0.1
0.1
1.500
0.1
0.1
0.1
0.1
0.1
2.000
0.1
0.1
0.2
0.2
0.2
2.500
0.2
0.2
0.2
0.2
0.2
3.000
0.2
0.2
0.2
0.2
0.3
3.500
0.3
0.3
0.3
0.3
0.3
4.000
0.3
0.3
0.3
0.3
0.3
4.500
0.4
0.4
0.4
0.4
0.4
5.000
0.4
0.4
0.4
0.4
0.4
5.500
0.5
0.5
0.5
0.5
0.5
6.000
0.5
0.5
0.5
0.5
0.6
6.500
0.6
0.6
0.6
0.6
0.6
7.000
0.6
0.7
0.7
0.7
0.7
7.500
0.7
0.7
0.8
0.8
0.8
8.000
0.8
0.8
0.8
0.9
0.9
8.500
0.9
0.9
1.0
1.0
1.0
9.000
1.0
1.1
1.1
1.1
1.1
9.500
1.2
1.2
1.2
1.3
1.3
10.000
1.3
1.4
1.4
1.5
1.5
10.500
1.5
1.6
1.6
1.7
1.7
11.000
1.8
1.8
1.9
2.0
2.0
11.500
2.1
2.2
2.4
2.7
3.0
12.000
3.5
4.1
4.4
4.7
4.9
12.500
5.0
5.1
5.1
5.2
5.3
13.000
5.3
5.4
5.4
5.5
5.5
13.500
5.6
5.6
5.6
5.7
5.7
14.000
5.8
5.8
5.8
5.9
5.9
14.500
5.9
6.0
6.0
6.0
6.0
15.000
6.1
6.1
6.1
6.1
6.2
15.500
6.2
6.2
6.2
6.3
6.3
16.000
6.3
6.3
6.3
6.3
6.4
16.500
6.4
6.4
6.4
6.4
6.4
17.000
6.5
6.5
6.5
6.5
6.5
17.500
6.5
6.5
6.6
6.6
6.6
Bentley Systems, Inc. Haestad Methods Solution Bentley PondPack V8i
Smithfield-MTA.ppc Center [08.11.01.56]
9/21/2017 27 Siemon Company Drive Suite 200 W Page 1 of 28
Watertown. CT 06795 USA [phone]

Subsection: Time -Depth Curve
Label: Bladen County
CUMULATIVE RAINFALL (in)
Output Time Increment = 0.100 hours
Time on left represents time for first value in each row.
Return Event: 25 years
Storm Event: 25 -Year
Time
Depth
Depth
Depth
Depth
Depth
(hours)
(in)
(in)
(in)
(in)
(in)
18.000
6.6
6.6
6.6
6.6
6.6
18.500
6.6
6.7
6.7
6.7
6.7
19.000
6.7
6.7
6.7
6.7
6.7
19.500
6.7
6.8
6.8
6.8
6.8
20.000
6.8
6.8
6.8
6.8
6.8
20.500
6.8
6.8
6.9
6.9
6.9
21.000
6.9
6.9
6.9
6.9
6.9
21.500
6.9
6.9
6.9
6.9
7.0
22.000
7.0
7.0
7.0
7.0
7.0
22.500
7.0
7.0
7.0
7.0
7.0
23.000
7.0
7.0
7.0
7.1
7.1
23.500
7.1
7.1
7.1
7.1
7.1
24.000
7.1
(N/A)
(N/A)
(N/A)
(N/A)
Smithfield-MTA.ppc
9/21/2017
Bentley Systems, Inc. Haestad Methods Solution
Center
27 Siemon Company Drive Suite 200 W
Watertown, CT 06795 USA [phone]
Bentley PondPack V8i
[08.11.01.56]
Page 2 of 28

Subsection: Time vs. Elevation
Label: DETENTION PIPE (OUT)
Time vs. Elevation (ft)
Output Time increment = 0.050 hours
Time on left represents time for first value in each row.
Return Event: 25 years
Storm Event: 25 -Year
Time Elevation Elevation Elevation Elevation Elevation
(hours) (ft) (ft) (ft) (ft) (ft)
Q.000
0.00
0.00
0.00
0.00
0.00
0.250
0.00
0.00
0.00
0.00
0.00
0.500
0.00
0.00
0.00
0.00
0.00
0.750
0.00
0.00
0.00
0.00
0.00
1.000
0.00
0.00
0.01
0.01
0.01
1.250
0.01
0.01
0.01
0.01
0.01
1.500
0.01
0.01
0.01
0.01
0.01
1.750
0.01
0.01
0.01
0.01
0.01
2.000
0.01
0.01
0.01
0.01
0.01
2.250
0.01
0.01
0.01
0.01
0.01
2.500
0.02
0.02
0.02
0.02
0.02
2.750
0.02
0.02
0.02
0.02
0.02
3.000
0.02
0.02
0.02
0.02
0.02
3.250
0.02
0.02
0.02
0.02
0.02
3.500
0.02
0.02
0.02
0.02
0.02
3.750
0.02
0.02
0.02
0.02
0.02
4.000
0.02
0.02
0.02
0.02
0.02
4.250
0.02
0.03
0.03
0.03
0.03
4.500
0.03
0.03
0.03
0.03
0.03
4.750
0.03
0.03
0.03
0.03
0.03
5.000
0.03
0.03
0.03
0.03
0.03
5.250
0.03
0.03
0.03
0.03
0.03
5.500
0.03
0.03
0.03
0.03
0.03
5.750
0.03
0.03
0.03
0.03
0.03
6.000
0.03
0.03
0.03
0.03
0.03
6.250
0.03
0.04
0.04
0.04
0.04
6.500
0.04
0.04
0.04
0.04
0.04
6.750
0.04
0.04
0.04
0.04
0.04
7.000
0.04
0.04
0.04
0.05
0.05
7.250
0.05
0.05
0.05
0.05
0.05
7.500
0.05
0.05
0.05
0.05
0.05
7.750
0.05
0.05
0.05
0.05
0.05
8.000
0.06
0.06
0.06
0.06
0.06
8.250
0.06
0.06
0.06
0.06
0.07
8.500
0.07
0.07
0.07
0.07
0.07
8.750
0.07
0.07
0.08
0.08
0.08
9.000
0.08
0.08
0.08
0.08
0.09
9.250
0.09
0.09
0.09
0.09
0.09
9.500
0.09
0.09
0.10
0.10
0.10
9.750
0.10
0.12
0.13
0.13
0.14
10.000
0.14
0.15
0.16
0.17
0.19
10.250
0.20
0.22
0.24
0.26
0.28
10.500
0.30
0.32
0.34
0.36
0.38
Bentley Systems, Inc. Haestad Methods Solution Bentley PondPack V8i
Smithfield-MTA.ppc Center [08.11.01.56]
9/21/2017 27 Siemon Company Drive Suite 200 W Page 3 of 28
Watertown, CT 06795 USA [phone]

Subsection: Time vs. Elevation Return Event: 25 years
Label: DETENTION PIPE (OUT) Storm Event: 25 -Year
Time vs. Elevation (ft)
Output Time increment = 0.050 hours
Time on left represents time for first value in each row.
Time Elevation Elevation Elevation Elevation Elevation
(hours) (ft) (ft) (ft) (ft) (ft)
10.750
11.000
11.250
11.500
11.750
12.000
12.250
12.500
12.750
13.000
13.250
13.500
13.750
14.000
14.250
14.500
14.750
15.000
15.250
15.500
15.750
16.000
16.250
16.500
16.750
17.000
17.250
17.500
17.750
18.000
18.250
18.500
18.750
19.000
19.250
19.500
19.750
20.000
20.250
20.500
20.750
21.000
21.250
Smithfield -MTA. ppc
9/21/2017
0.40
0.52
0.68
0.94
1.62
3.37
5.95
6.47
5.93
5.21
4.43
3.72
3.13
2.62
2.16
1.76
1.40
1.07
0.77
0.49
0.21
0.06
0.06
0.06
0.05
0.05
0.05
0.04
0.04
0.04
0.04
0.04
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.43
0.54
0.73
1.01
1.87
4.01
6.17
6.41
5.80
5.06
4.28
3.60
3.02
2.52
2.08
1.69
1.33
1.01
0.71
0.43
0.14
0.06
0.06
0.05
0.05
0.05
0.05
0.04
0.04
0.04
0.04
0.04
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
Bentley Sy
27 Si(
WatertoN
0.45
0.57
0.78
1.11
2.14
4.65
6.33
6.31
5.66
4.90
4.13
3.47
2.92
2.43
2.00
1.61
1.26
0.95
0.65
0.38
0.07
0.06
0.06
0.05
0.05
0.05
0.05
0.04
0.04
0.04
0.04
0.04
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
stems, Inc. Haestac
Center
-mon Company Drim
in, CT 06795 USA
0.47
0.60
0.83
1.24
2.44
5.24
6.44
6.19
5.51
4.75
3.99
3.36
2.81
2.34
1.92
1.54
1.20
0.89
0.60
0.32
0.07
0.06
0.06
0.05
0.05
0.05
0.04
0.04
0.04
0.04
0.04
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
Methods Solution
Suite 200 W
•1-203-755-1666
0.50
0.64
0.88
1.41
2.83
5.66
6.49
6.07
5.36
4.59
3.85
3.24
2.71
2.25
1.84
1.47
1.13
0.83
0.54
0.26
0.06
0.06
0.06
0.05
0.05
0.05
0.04
0.04
0.04
0.04
0.04
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
Bentley PondPack V8i
[08.11.01.56]
Page 4 of 28

r
Subsection: Time vs. Elevation Return Event: 25 years
Label: DETENTION PIPE (OUT) Storm Event: 25 -Year
Time vs. Elevation (ft)
Output Time increment = 0.050 hours
Time on left represents time for first value in each row.
Time
Elevation
Elevation
Elevation
Elevation
Elevation
(hours)
(ft)
(ft)
(ft)
(ft)
(ft)
21.500
0.03
0.03
0.03
0.03
0.03
21.750
0.03
0.03
0.03
0.03
0.03
22.000
0.02
0.02
0.02
0.02
0.02
22.250
0.02
0.02
0.02
0.02
0.02
22.500
0.02
0.02
0.02
0.02
0.02
22.750
0.02
0.02
0.02
0.02
0.02
23.000
0.02
0.02
0.02
0.02
0.02
23.250
0.02
0.02
0.02
0.02
0.02
23.500
0.02
0.02
0.02
0.02
0.02
23.750
0.02
0.02
0.02
0.02
0.02
24.000
0.02
(N/A)
(N/A)
(N/A)
(N/A)
Smithfield -MTA. ppc
9/21/2017
Bentley Systems, Inc. Haestad Methods Solution
Center
27 Siemon Company Drive Suite 200 W
Watertown, CT 06795 USA [phone]
Bentley PondPack V8i
[08.11.01.56]
Page 5 of 28

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0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 O o 0 0 0 0 0 o O O O O 0 o O 0 O o 0 0 0 0 0 0 o O O O O O o
0 C. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
C) O o 0 o O o O O o 0 0 0 0 0 0 0 o O O o 0 0 0 0 0 o O O O o 0
N N N N
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N W W 1D ? O 01 f V W tO Ln f V W O O1 W lD M W O V N %0 V In W r O O
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Subsection: Pipe Volume
Label: DETENTION PIPE
Return Event: 25 years
Storm Event: 25 -Year
Elevation
Perpendicular
Perpendicular
Wetted
Filled
Perpendicular
Perpendicular
Total
(ft)
Downstream
Downstream
Length
Length
Upstream
Upstream Area
Volume
Depth
Area
(ft)
(ft)
Depth
(ft2)
(ac -ft)
(ft)
(ft2)
(ft)
2.66
2.66
14.6
3,200.00
0.00
2.66
14.6
1.072
2.74
2.74
15.2
3,200.00
0.00
2.74
15.2
1.118
2.82
2.82
15.8
3,200.00
0.00
2.82
15.8
1.164
2.91
2.91
16.5
3,200.00
0.00
2.91
16.5
1.211
2.99
2.99
17.1
3,200.00
0.00
2.99
17.1
1.258
3.07
3.07
17.8
3,200.00
0.00
3.07
17.8
1.305
3.15
3.15
18.4
3,200.00
0.00
3.15
18.4
1.353
3.24
3.24
19.1
3,200.00
0.00
3.24
19.1
1.401
3.32
3.32
19.7
3,200.00
0.00
3.32
19.7
1.449
3.40
3.40
20.4
3,200.00
0.00
3.40
20.4
1.497
3.49
3.49
21.0
3,200.00
0.00
3.49
21.0
1.545
3.57
3.57
21.7
3,200.00
0.00
3.57
21.7
1.594
3.65
3.65
22.4
3,200.00
0.00
3.65
22.4
1.642
3.74
3.74
23.0
3,200.00
0.00
3.74
23.0
1.691
3.82
3.82
23.7
3,200.00
0.00
3.82
23.7
1.739
3.90
3.90
24.3
3,200.00
0.00
3.90
24.3
1.788
3.98
3.98
25.0
3,200.00
0.00
3.98
25.0
1.837
4.07
4.07
25.7
3,200.00
0.00
4.07
25.7
1.886
4.15
4.15
26.3
3,200.00
0.00
4.15
26.3
1.934
4.23
4.23
27.0
3,200.00
0.00
4.23
27.0
1.983
4.32
4.32
27.7
3,200.00
0.00
4.32
27.7
2.032
4.40
4.40
28.3
3,200.00
0.00
4.40
28.3
2.080
4.48
4.48
29.0
3,200.00
0.00
4.48
29.0
2.129
4.57
4.57
29.6
3,200.00
0.00
4.57
29.6
2.177
4.65
4.65
30.3
3,200.00
0.00
4.65
30.3
2.225
4.73
4.73
30.9
3,200.00
0.00
4.73
30.9
2.274
4.81
4.81
31.6
3,200.00
0.00
4.81
31.6
2.321
4.90
4.90
32.2
3,200.00
0.00
4.90
32.2
2.369
4.98
4.98
32.9
3,200.00
0.00
4.98
32.9
2.416
5.06
5.06
33.5
3,200.00
0.00
5.06
33.5
2.464
5.15
5.15
34.2
3,200.00
0.00
5.15
34.2
2.510
5.23
5.23
34.8
3,200.00
0.00
5.23
34.8
2.557
5.31
5.31
35.4
3,200.00
0.00
5.31
35.4
2.603
5.40
5.40
36.1
3,200.00
0.00
5.40
36.1
2.649
5.48
5.48
36.7
3,200.00
0.00
5.48
36.7
2.695
5.56
5.56
37.3
3,200.00
0.00
5.56
37.3
2.740
5.64
5.64
37.9
3,200.00
0.00
5.64
37.9
2.785
5.73
5.73
38.5
3,200.00
0.00
5.73
38.5
2.829
5.81
5.81
39.1
3,200.00
0.00
5.81
39.1
2.873
5.89
5.89
39.7
3,200.00
0.00
5.89
39.7
2.916
5.98
5.98
40.3
3,200.00
0.00
5.98
40.3
2.958
6.06
6.06
40.8
3,200.00
0.00
6.06
40.8
3.001
6.14
6.14
41.4
3,200.00
0.00
6.14
41.4
3.042
6.23
6.23
42.0
3,200.00
0.00
6.23
42.0
3.083
6.31
6.31
42.5
3,200.00
0.00
6.31
42.5
3.123
Bentley Systems, Inc. Haestad Methods Solution Bentley PondPack V8i
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Subsection: Pipe Volume
Label: DETENTION PIPE
Return Event: 25 years
Storm Event: 25 -Year
Elevation Perpendicular
Perpendicular
Wetted Filled
Perpendicular
Perpendicular
Total
(ft) Downstream
Downstream
Length Length
Upstream
Upstream Area
Volume
Depth
Area
(ft) (ft)
Depth
(ft2)
(ac -ft)
(ft)
(ft2)
(ft)
6.39 6.39
43.1
3,200.00 0.00
6.39
43.1
3.163
6.47 6.47
43.6
3,200.00 0.00
6.47
43.6
3.201
6.56 6.56
44.1
3,200.00 0.00
6.56
44.1
3.239
6.64 6.64
44.6
3,200.00 0.00
6.64
44.6
3.276
6.72 6.72
45.1
3,200.00 0.00
6.72
45.1
3.313
6.81 6.81
45.6
3,200.00 0.00
6.81
45.6
3.348
6.89 6.89
46.0
3,200.00 0.00
6.89
46.0
3.382
6.97 6.97
46.5
3,200.00 0.00
6.97
46.5
3.415
7.06 7.06
46.9
3,200.00 0.00
7.06
46.9
3.447
7.14 7.14
47.3
3,200.00 0.00
7.14
47.3
3.478
7.22 7.22
47.7
3,200.00 0.00
7.22
47.7
3.508
7.30 7.30
48.1
3,200.00 0.00
7.30
48.1
3.536
7.39 7.39
48.5
3,200.00 0.00
7.39
48.5
3.563
7.47 7.47
48.8
3,200.00 0.00
7.47
48.8
3.588
7.55 7.55
49.2
3,200.00 0.00
7.55
49.2
3.611
7.64 7.64
49.4
3,200.00 0.00
7.64
49.4
3.633
7.72 7.72
49.7
3,200.00 0.00
7.72
49.7
3.652
7.80 7.80
49.9
3,200.00 0.00
7.80
49.9
3.668
7.89 7.89
50.1
3,200.00 0.00
7.89
50.1
3.682
7.97 7.97
50.2
3,200.00 0.00
7.97
50.2
3.691
8.00 8.00
50.3
3,200.00 3,200.00
8.00
50.3
3.693
Bentley Systems, Inc. Haestad Methods Solution Bentley PondPack V8i
Smithfield-MTA.ppc Center [08.11.01.56]
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Subsection: Outlet Input Data
Label: Linear Pond Outfall
Smithfield-MTA.ppc
9/21/2017
Return Event: 25 years
Storm Event: 25 -Year
Requested Pond Water Surface Elevations
Minimum (Headwater) 0.00 ft
Increment (Headwater) 0.50 ft
Maximum (Headwater) 1.00 ft
Outlet Connectivity
Structure Type Outlet ID Direction Outfall El E2
(ft) (ft)
Rectangular Weir
EndLinearP
Forward
TW
133.30
134.30
and
Tailwater Settings
Tailwater
(N/A)
(N/A)
Bentley Systems, Inc. Haestad Methods Solution
Center
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Watertown, CT 06795 USA [phone]
Bentley PondPack V8i
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Page 9 of 28

Subsection: Outlet Input Data Return Event: 25 years
Label: Linear Pond Outfall Storm Event: 25 -Year
Structure ID: EndLinearPond
Structure Type: Rectangular Weir
Number of Openings
1
Elevation
133.30 ft
Weir Length
10.00 ft
Weir Coefficient
3.00 (ft^0.5)/s
Structure ID: TW
Structure Type: TW Setup, DS Channel
Tailwater Type
Downstream
Channel
Catalog Conduit Conduit Catalog -
1
Channel Slope
0.004 ft/ft
Channel Invert Elevation
0.00 ft
Convergence Tolerances
Maximum Iterations
30
Tailwater Tolerance
0.01 ft
(Minimum)
Tailwater Tolerance
0.50 ft
(Maximum)
Headwater Tolerance
0.01 ft
(Minimum)
Headwater Tolerance
0.50 ft
(Maximum)
Flow Tolerance (Minimum)
0.001 ft3/s
Flow Tolerance (Maximum)
10.000 ft3/s
Bentley Systems, Inc. Haestad Methods Solution Bentley PondPack V8i
Smithfield-MTA.ppc Center [08.11.01.56]
9/21/2017 27 Siemon Company Drive Suite 200 W Page 10 of 28
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Subsection: Outlet Input Data
Label: Underground Detention Discharge
Requested Pond Water Surface Elevations
Minimum (Headwater) 0.00 ft
Increment (Headwater) 0.10 ft
Maximum (Headwater) 8.00 ft
Return Event: 25 years
Storm Event: 25 -Year
Outlet Connectivity
Structure Type Outlet ID Direction Outfall El E2
(ft) (ft)
User Defined
PUMP
Forward
TW
0.00
8.00
Table
Tailwater Settings
Tailwater
(N/A)
(N/A)
Bentley Systems, Inc. Haestad Methods Solution Bentley PondPack V8i
Smithfield-MTA.ppc Center [08.11.01.56]
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Subsection: Outlet Input Data
Label: Underground Detention Discharge
Structure ID: PUMP
30
Structure Type: User Defined Table
0.01 ft
Elevation Flow
(ft) (cfs)
0.50 ft
0.00
0
0.10
(Minimum)
7
2.50
0.50 ft
20
4.50
Flow Tolerance (Minimum)
33
8.00
8.000 ft3/s
33
Structure ID: TW
Structure Type: TW Setup, DS Channel
Tailwater Type Free Outfall
Convergence Tolerances
Maximum Iterations
30
Tailwater Tolerance
0.01 ft
(Minimum)
Tailwater Tolerance
0.50 ft
(Maximum)
Headwater Tolerance
0.01 ft
(Minimum)
Headwater Tolerance
0.50 ft
(Maximum)
Flow Tolerance (Minimum)
0.001 ft3/s
Flow Tolerance (Maximum)
8.000 ft3/s
Return Event: 25 years
Storm Event: 25 -Year
Bentley Systems, Inc. Haestad Methods Solution Bentley PondPack V8i
Smithfield -MTA. ppc Center [08.11.01.56]
9/21/2017 27 Siemon Company Drive Suite 200 W Page 12 of 28
Watertown, CT 06795 USA [phone]

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Subsection: Composite Rating Curve Return Event: 25 years
Label: Underground Detention Discharge Storm Event: 25 -Year
Composite Outflow Summary
Contributing Structures
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
Bentley Systems, Inc. Haestad Methods Solution Bentley Pond Pack V8i
Smithfield-MTA.ppc Center [08.11.01.56]
9/21/2017 27 Siemon Company Drive Suite 200 W Page 15 of 28
Watertown, CT 06795 USA [phone]

Subsection: Composite Rating Curve Return Event: 25 years
Label: Underground Detention Discharge Storm Event: 25 -Year
Composite Outflow Summary
Contributing Structures
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
PUMP
Bentley Systems, Inc. Haestad Methods Solution Bentley PondPack V8i
Smithfield-MTA.ppc Center [08.11.01.56]
9/21/2017 27 Siemon Company Drive Suite 200 W Page 16 of 28
Watertown, CT 06795 USA [phone]

CD
m
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Subsection: Diverted Hydrograph
Label: 24" RCP
HYDROGRAPH ORDINATES (cfs)
Output Time Increment = 0.050 hours
Time on left represents time for first value in each row.
Return Event: 25 years
Storm Event: 25 -Year
Time
Flow
Flow
Flow
Flow
Flow
(hours)
(S)
(S)
(S)
(S)
(S)
10.500
1
1
1
1
1
10.750
1
1
1
1
1
11.000
1
1
1
1
1
11.250
1
1
1
1
1
11.500
1
1
1
1
2
11.750
2
2
3
3
4
12.000
5
6
7
7
7
12.250
6
6
5
5
4
12.500
3
3
3
2
2
12.750
2
2
2
1
1
13.000
1
1
1
1
1
13.250
1
1
1
1
1
13.500
1
1
1
1
1
13.750
1
1
1
1
1
14.000
1
1
1
1
1
14.250
1
1
1
1
1
14.500
1
1
1
1
1
14.750
1
1
1
0
0
15.000
0
0
0
0
0
15.250
0
0
0
0
0
15.500
0
0
0
0
0
15.750
0
0
0
0
0
16.000
0
0
0
0
0
16.250
0
0
0
0
0
16.500
0
0
0
0
0
16.750
0
0
0
0
0
17.000
0
0
0
0
0
17.250
0
0
0
0
0
17.500
0
0
0
0
0
17.750
0
0
0
0
0
18.000
0
0
0
0
0
18.250
0
0
0
0
0
18.500
0
0
0
0
0
18.750
0
0
0
0
0
19.000
0
0
0
0
0
19.250
0
0
0
0
0
19.500
0
0
0
0
0
19.750
0
0
0
0
0
20.000
0
0
0
0
0
20.250
0
0
0
0
0
20.500
0
0
0
0
0
20.750
0
0
0
0
0
21.000
0
0
0
0
0
21.250
0
0
0
0
0
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Subsection: Diverted Hydrograph
Label: 24" RCP
HYDROGRAPH ORDINATES (cfs)
Output Time Increment = 0.050 hours
Time on left represents time for first value in each row.
Time Flow Flow Flow Flow Flow
(hours) (cfs) (cfs) (cfs) (cfs) (cfs)
21.500
0
0
0
0
21.750
0
0
0
0
22.000
0
0
0
0
22.250
0
0
0
0
22.500
0
0
0
0
22.750
0
0
0
0
23.000
0
0
0
0
23.250
0
0
0
0
23.500
0
0
0
0
23.750
0
0
0
0
24.000
0
(N/A)
(N/A)
(N/A)
Return Event: 25 years
Storm Event: 25 -Year
0
0
0
0
0
0
0
0
0
0
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Subsection: Elevation -Volume -Flow Table (Pond)
Label: DETENTION PIPE
Infiltration
0
Infiltration Method
No Infiltration
(Computed)
0
0
0.10
Initial Conditions
0.009
Elevation (Water Surface,
0.00 ft
Initial)
it
Volume (Initial)
0.000 ac -ft
Flow (Initial Outlet)
0 cfs
Flow (Initial Infiltration)
0 cfs
Flow (Initial, Total)
0 cfs
Time Increment
0.050 hours
Elevation Outflow Storage Area
(ft) (cfs) (ac -ft) (acres)
Return Event: 25 years
Storm Event: 25 -Year
Infiltration Flow (Total) 2S/t + 0
(cfs) (cfs) (cfs)
0.00
0
0.000
0.000
0
0
0
0.10
7
0.009
0.000
0
7
it
0.20
7
0.025
0.000
0
7
19
0.30
8
0.045
0.000
0
8
30
0.40
8
0.069
0.000
0
8
42
0.50
9
0.096
0.000
0
9
55
0.60
9
0.126
0.000
0
9
70
0.70
10
0.158
0.000
0
10
86
0.80
10
0.192
0.000
0
10
104
0.90
11
0.228
0.000
0
11
122
1.00
12
0.266
0.000
0
12
141
1.10
12
0.306
0.000
0
12
160
1.20
13
0.347
0.000
0
13
181
1.30
13
0.390
0.000
0
13
202
1.40
14
0.434
0.000
0
14
224
1.50
14
0.479
0.000
0
14
246
1.60
15
0.526
0.000
0
15
269
1.70
15
0.573
0.000
0
15
293
1.80
16
0.622
0.000
0
16
317
1.90
17
0.671
0.000
0
17
341
2.00
17
0.722
0.000
0
17
366
2.10
18
0.773
0.000
0
18
392
2.20
18
0.825
0.000
0
18
418
2.30
19
0.878
0.000
0
19
444
2.40
19
0.932
0.000
0
19
470
2.50
20
0.986
0.000
0
20
497
2.60
20
1.041
0.000
0
20
524
2.70
21
1.096
0.000
0
21
552
2.80
22
1.152
0.000
0
22
579
2.90
22
1.208
0.000
0
22
607
3.00
23
1.265
0.000
0
23
635
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Subsection: Elevation -Volume -Flow Table (Pond)
Label: DETENTION PIPE
Return Event: 25 years
Storm Event: 25 -Year
Elevation
Outflow
Storage
Area
Infiltration
Flow (Total)
2S/t + O
(ft)
(cfs)
(ac -ft)
(acres)
(cfs)
(cfs)
(cfs)
7.60
33
3.623
0.000
0
33
1,787
7.70
33
3.647
0.000
0
33
1,798
7.80
33
3.668
0.000
0
33
1,808
7.90
33
3.683
0.000
0
33
1,816
8.00
33
3.693
0.000
0
33
1,820
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Subsection: Level Pool Pond Routing Summary
Label: DETENTION PIPE (IN)
Infiltration
6.49 ft
Infiltration Method
No Infiltration
(Computed)
3.206 ac -ft
Initial Conditions
Elevation (Water Surface,
0.00 ft
Initial)
12.081 ac -ft
Volume (Initial)
0.000 ac -ft
Flow (Initial Outlet)
0 cfs
Flow (Initial Infiltration)
0 cfs
Flow (Initial, Total)
0 cfs
Time Increment
0.050 hours
Inflow/Outflow Hydrograph Summary
Return Event: 25 years
Storm Event: 25 -Year
Flow (Peak In) 124 cfs Time to Peak (Flow, In) 12.100 hours
Flow (Peak Outlet) 33 cfs Time to Peak (Flow, Outlet) 12.100 hours
Elevation (Water Surface,
6.49 ft
Peak)
Volume (Peak)
3.206 ac -ft
Mass Balance (ac -ft)
Volume (Initial)
0.000 ac -ft
Volume (Total Inflow)
12.081 ac -ft
Volume (Total Infiltration)
0.000 ac -ft
Volume (Total Outlet
12.081 ac -ft
Outflow)
Volume (Retained)
0.000 ac -ft
Volume (Unrouted)
0.000 ac -ft
Error (Mass Balance)
0.0 %
Smithfield -MTA. ppc
9/21/2017
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Page 23 of 28

Subsection: Pond Routed Hydrograph (total out)
Label: DETENTION PIPE (OUT)
Peak Discharge 33 cfs
Time to Peak 12.750 hours
Hydrograph Volume 12.079 ac -ft
HYDROGRAPH ORDINATES (cfs)
Output Time Increment = 0.050 hours
Time on left represents time for first value in each row.
Time Flow Flow Flow Flow Flow
(hours) (cfs) (cfs) (cfs) (cfs) (cfs)
Return Event: 25 years
Storm Event: 25 -Year
0.600
0
0
0
0
0
0.850
0
0
0
0
0
1.100
0
0
0
0
0
1.350
1
1
1
1
1
1.600
1
1
1
1
1
1.850
1
1
1
1
1
2.100
1
1
1
1
1
2.350
1
1
1
1
1
2.600
1
1
1
1
1
2.850
1
1
1
1
1
3.100
1
1
1
1
1
3.350
1
1
1
1
1
3.600
1
1
1
1
1
3.850
2
2
2
2
2
4.100
2
2
2
2
2
4.350
2
2
2
2
2
4.600
2
2
2
2
2
4.850
2
2
2
2
2
5.100
2
2
2
2
2
5.350
2
2
2
2
2
5.600
2
2
2
2
2
5.850
2
2
2
2
2
6.100
2
2
2
2
2
6.350
2
2
2
2
3
6.600
3
3
3
3
3
6.850
3
3
3
3
3
7.100
3
3
3
3
3
7.350
3
3
3
3
3
7.600
3
3
3
3
4
7.850
4
4
4
4
4
8.100
4
4
4
4
4
8.350
4
4
4
4
5
8.600
5
5
5
5
5
8.850
5
5
5
5
5
9.100
5
6
6
6
6
9.350
6
6
6
6
6
9.600
6
6
7
7
7
9.850
7
7
7
7
7
10.100
7
7
7
7
7
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Subsection: Pond Routed Hydrograph (total out)
Label: DETENTION PIPE (OUT)
HYDROGRAPH ORDINATES (cfs)
Output Time Increment = 0.050 hours
Time on left represents time for first value in each row.
Return Event: 25 years
Storm Event: 25 -Year
Time
Flow
Flow
Flow
Flow
Flow
(hours)
(S)
(Cfs)
(S)
(S)
(S)
10.350
7
7
8
8
8
10.600
8
8
8
8
8
10.850
9
9
9
9
9
11.100
9
9
10
10
10
11.350
10
11
11
11
12
11.600
12
13
14
15
16
11.850
18
19
22
26
30
12.100
33
33
33
33
33
12.350
33
33
33
33
33
12.600
33
33
33
33
33
12.850
33
33
33
33
33
13.100
33
33
33
33
32
13.350
31
30
29
28
27
13.600
26
25
25
24
23
13.850
23
22
21
21
20
14.100
19
19
18
18
17
14.350
17
17
16
16
15
14.600
15
15
14
14
13
14.850
13
13
12
12
12
15.100
11
11
11
10
10
15.350
10
9
9
9
8
15.600
8
8
7
7
7
15.850
5
4
4
4
4
16.100
4
4
4
4
4
16.350
4
4
4
4
4
16.600
4
4
4
3
3
16.850
3
3
3
3
3
17.100
3
3
3
3
3
17.350
3
3
3
3
3
17.600
3
3
3
3
3
17.850
3
3
3
3
2
18.100
2
2
2
2
2
18.350
2
2
2
2
2
18.600
2
2
2
2
2
18.850
2
2
2
2
2
19.100
2
2
2
2
2
19.350
2
2
2
2
2
19.600
2
2
2
2
2
19.850
2
2
2
2
2
20.100
2
2
2
2
2
20.350
2
2
2
2
2
20.600
2
2
2
2
2
20.850
2
2
2
2
2
21.100
2
2
2
2
2
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Subsection: Pond Routed Hydrograph (total out)
Label: DETENTION PIPE (OUT)
HYDROGRAPH ORDINATES (ds)
Output Time Increment = 0.050 hours
Time on left represents time for first value in each row.
Return Event: 25 years
Storm Event: 25 -Year
Time
Flow
Flow
Flow
Flow
Flow
(hours)
(S)
(Cfs)
(S)
(S)
(S)
21.350
2
2
2
2
2
21.600
2
2
2
2
2
21.850
2
2
2
2
2
22.100
2
2
2
2
2
22.350
2
2
2
2
2
22.600
2
2
2
2
2
22.850
2
1
1
1
1
23.100
1
1
1
1
1
23.350
1
1
1
1
1
23.600
1
1
1
1
1
23.850
1
1
1
1
(N/A)
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Subsection: Pond Inflow Summary Return Event: 25 years
Label: DETENTION PIPE (IN) Storm Event: 25 -Year
Summary for Hydrograph Addition at'DETENTION PIPE'
Upstream Link Upstream Node
<Catchment to Outflow Node> DRAINAGE AREA
24" RCP South Basin
Node Inflows
Inflow Type
Element
Volume
Time to Peak Flow (Peak)
(ac -ft)
(hours) WS)
Flow (From)
DRAINAGE
11.211
12.100 117
AREA
Flow (From)
24" RCP
0.870
12.150 7
Flow (In)
DETENTION
12.081
12.100 124
PIPE
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Index
24" RCP (Diverted Hydrograph, 25 years)... 17, 18, 19
Bladen County (Time -Depth Curve, 25 years) ... 1, 2
DETENTION PIPE (Elevation -Volume -Flow Table (Pond), 25 years) ... 20, 21, 22
DETENTION PIPE (IN) (Level Pool Pond Routing Summary, 25 years) ... 23
DETENTION PIPE (IN) (Pond Inflow Summary, 25 years) ... 27
DETENTION PIPE (OUT) (Pond Routed Hydrograph (total out), 25 years) ... 24, 25,
26
DETENTION PIPE (OUT) (Time vs. Elevation, 25 years) ... 3, 4, 5
DETENTION PIPE (Pipe Volume, 25 years) ... 6, 7, 8
Linear Pond Outfall (Composite Rating Curve, 25 years)...
Linear Pond Outfall (Outlet Input Data, 25 years) ... 9, 10
Underground Detention Discharge (Composite Rating Curve, 25 years) ... 13, 14, 15,
16
Underground Detention Discharge (Outlet Input Data, 25 years)... 11, 12
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Attachment 2
Pavement Flow to Level Spreader
Project Description
Friction Method
Manning Formula
Solve For
Normal Depth
Input Data
850.08 ft
Roughness Coefficient
0.013
Channel Slope
0.00760 ft/ft
Bottom Width
850.00 ft
Discharge
44.00 ft3/s
Results
Normal Depth
0.04 ft
Flow Area
36.00 ftz
Wetted Perimeter
850.08 ft
Hydraulic Radius
0.04 ft
Top Width
850.00 ft
Critical Depth
0.04 ft
I Velocity 1.22 ft/s I
Velocity Head 0.02 ft
Specific Energy 0.07 ft
Froude Number 1.05
Flow Type Supercritical
GVF Input Data
Downstream Depth
0.00
ft
Length
0.00
ft
Number Of Steps
0
GVF Output Data
Upstream Depth
0.00
ft
Profile Description
Profile Headloss
0.00
ft
Downstream Velocity
Infinity
ft/s
Upstream Velocity
Infinity
ft/s
Normal Depth
0.04
ft
Critical Depth
0.04
ft
Channel Slope
0.00760
fUft
Critical Slope
0.00700
ft/ft
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EXISTING WETLAND TO
REMAIN UNDISTUBED
I
LIMITS OF CONSTRUCTION-�
•a •
CONTRACTOR TO I 5'
ENSURE A LEVEL EDGE
BTM
ENTIRE LENGTH OF - `•{
LEVEL SPREADER -�
00 z RIP -RAP
FILTER FABRIC 1- �1 ANGULAR ROCK
(SHOWN OFFSET FOR CLARIM Dw--6" MIN.
RIP -RAP LEVEL SPREADER
NOT TO SCALE
PROPOSED CONCRETE
PAVEMENT
Kimley)))Horn PROJECT LOCATION SHEET TITLE:
ATTACHMENT 3 SMITHFIELD FOODS SECTION A -A
421 FAYETTEVILLE ST. SUITE 600 LEVEL SPREADER DETAIL TAR HEEL, NC DATE: 9/21/2017
RALEIGH. NC 27601 919-677-2000 SHEET 1 OF 1