20120072 Ver 6_Stream 7-1 and &-2 Revision_20130304

March 1, 2013
U.S. Army Corps of Engineers
Asheville Regulatory Field Office
151 Patton Avenue, Room 208
Asheville, North Carolina 28801 -5006
Attention: Mr. Steve Kichefski
N.C. Division of Water Quality
401 Wetlands Unit
512 North Salisbury Street
Raleigh, North Carolina 27604
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Lg k!:!7
MAR 0 4 2013
Attention: Ms. Karen Higgins
Reference: Request for Additional Project Revision
PNG Line # 170 Project
Cabarrus, Iredell and Mecklenburg Counties, North Carolina
S &ME Project No. 1357 -10 -022
Action ID No. 2012 -00298
DWQ Project No. 12 -0072
Dear Mr. Kichefski and Ms. Higgins:
S &ME, Inc. (S &ME) hereby submits this request to revise plans related to the Piedmont
Natural Gas (PNG) Line # 170 Project. Specifically, this revision entails relocation of a
short segment of the natural gas pipeline in order to cross a stream at a location different
from that which was previously permitted. The overall project entails construction of
approximately 8.8 miles of natural gas transmission pipeline in Cabarrus, Iredell and
Mecklenburg Counties, North Carolina. The location of the overall project corridor is
depicted on the Site Vicinity Map (Figure 1), and the location of the stream subject to the
proposed change is shown on a USGS topographic map (Figure 2) and a 2010 Aerial
Photograph (Figure 3).
PROJECT BACKGROUND
The stream subject to this proposed revision is identified as Rocky River (Stream 7.1).
The relocation will also involve an additional crossing of a separate stream (Stream
S7.2). Both streams are located off of Rocky River Road in Mecklenburg County, North
Carolina. The net effect of the re -route will decrease the overall stream impacts that are
currently permitted in connection with the original pipeline alignment.
S &ME, INC. / 9751 Southern Pone Boulevard / Charlotte, NC 28273 -5560 / p 704 523 4726 / 704.525 3953 / www smeinc.com

March 1, 2013
U.S. Army Corps of Engineers
Asheville Regulatory Field Office
151 Patton Avenue, Room 208
Asheville, North Carolina 28801 -5006
Attention: Mr. Steve Kichefski
N.C. Division of Water Quality
401 Wetlands Unit
512 North Salisbury Street
Raleigh, North Carolina 27604
Attention: Ms. Karen Higgins
Reference: Request for Additional Project Revision
PNG Line # 170 Project
Cabarrus, Iredell and Mecklenburg Counties, North Carolina
S &ME Project No. 1357 -10 -022
Action ID No. 2012 -00298
DWQ Project No. 12 -0072
Dear Mr. Kichefski and Ms. Higgins:
S &ME, Inc. (S &ME) hereby submits this request to revise plans related to the Piedmont
Natural Gas (PNG) Line # 170 Project. Specifically, this revision entails relocation of a
short segment of the natural gas pipeline in order to cross a stream at a location different
from that which was previously permitted. The overall project entails construction of
approximately 8.8 miles of natural gas transmission pipeline in Cabarrus, Iredell and
Mecklenburg Counties, North Carolina. The location of the overall project corridor is
depicted on the Site Vicinity Map (Figure 1), and the location of the stream subject to the
proposed change is shown on a USGS topographic map (Figure 2) and a 2010 Aerial
Photograph (Figure 3).
PROJECT BACKGROUND
The stream subject to this proposed revision is identified as Rocky River (Stream 7.1).
The relocation will also involve an additional crossing of a separate stream (Stream
S7.2). Both streams are located off of Rocky River Road in Mecklenburg County, North
Carolina. The net effect of the re -route will decrease the overall stream impacts that are
currently permitted in connection with the original pipeline alignment.
S &ME, INC. / 9751 Southern Pine Blvd / Charlotte, NC 28273 / p 704.523.4726 f 704.525.3953 / www.smeinc.com

Request for Additional Project Revision S &ME Project No. 1357 -10 -022
PNG Line # 170 Protect March 1, 2013
On February 18, 2013, S &ME submitted a request to change the crossing method of
Stream S7.1. The change was necessary due to presence of sub - surface rock, which
created problems so acute that the contractor appealed for a variance to abandon the
originally planned horizontal directional drill (HDD) and install the pipe by conventional
isolation (open -cut) methods.
Since that time, the land owner has expressed concerns to PNG regarding the proposed
change in crossing method at Stream S7.1. The contractor is nearing completion on the
pipeline, and further delays in its construction could have a negative impact on in- service
dates to the PNG Sutton Plant (Progress Energy). To avoid litigation that would
significantly impact the project's critical timeline, PNG has agreed to shift the proposed
easement from its current location such that it avoids crossing Stream 7.1 on the owner's
property.
PROPOSED REVISION
Approximately 2,651 linear feet (If) of the pipeline will be re- routed to accommodate the
change in alignment. The re -route shifts the crossing location of Stream S7.1
approximately 530 If due west of the original location. In so doing, the re -route will also
cross Stream S7.2, a small, heavily- incised perennial tributary to Stream 7.1.
Streams S7.1 and S7.2 are to be crossed using traditional open -cut methods. Use of HDD
crossing methods were ruled out based on the issues encountered during the contractor's
previous attempts to cross Stream 7.1 in such a manner. Factors relating to this decision
include the anticipated depth of extremely dense rock, which would require drilling at a
more shallow depth. Doing so would increase the risk of an inadvertent release of
drilling fluid to the stream. Review of available subsurface geotechnical information
associated with the original crossing also indicated that the overlying material would
require use of drilling mud at a pound -force per square inch (psi) that is not suitable for
the less stable sub - surface. As such, the risk of the drilling mud finding voids and
capillaries to funnel to the surface would increase substantially.
The contractor has indicated that the work can performed with less risk to the stream
channels by first isolating the proposed work area with coffer dams and a clean -water
bypass, and installing the pipe conventionally "in the dry." In order to minimize
impacts to the channels themselves, the contractor can conduct the pre -work necessary to
install the pipe in advance of the actual stream crossings. Stabilization and restoration of
the streambanks can commence immediately following installation of the pipe. The
restoration will be conducted in accordance with the project's existing restoration plan,
using natural channel materials rather than rip -rap or hard - armoring.
The contractor will be able to perform the work within a proposed 75 -foot workspace
corridor, and as such, a net decrease of 218 if of stream impacts will occur. The
original Stream S7.1 crossing involved 374 If of impact because it did not cross at a near -
perpendicular angle in order parallel and abut the adjacent property boundary. The new
crossing will be conducted at a near - perpendicular angle, and as a result, impacts to
Stream 7.1 will be reduced to 801f. Similarly, Stream 7.2 will be crossed at a
2

Request for Additional Project Revision S &ME Project No. 1357 -10 -022
PNG Line # 170 Protect March 1, 2013
perpendicular angle, with impacts limited to 761f. A revised Stream Impact Table is
included in Appendix I.
ASSSESSMENT OF RE -ROUTE CORRIDOR
On February 25, 2012, S &ME met PNG personnel on -site and reviewed the re -route
corridor, which is located just east of the project's original alignment on the other side of
Rocky River. The re -route traverses north through actively- farmed agricultural land
before crossing the Rocky River and re- connecting with the original alignment.
Vegetation observed in the agricultural field was generally comprised of planted pasture
grass, crop remnants or disturbance - dependent, early successional species consistent with
agricultural -based communities. Both streams are heavily incised, and Stream 7.1
exhibited steep banks. Vegetation adjacent to the streambanks included sycamore
(Platanus occidentalis), river birch (Betula nigra), black willow (Salix nigra) and
sweetgum. Shrubs included Chinese privet (Ligustrum sinense), multiflora rose (Rosa
multiflora) and blackberry (Rubus sp.). Photographs of the re -route corridor are included
in Appendix II.
The jurisdictional limits of Streams 7.1 and 7.2 were identified by S &ME personnel,
subsequently surveyed by McKim & Creed, PNG's surveyor, and are depicted on the
revised Jurisdictional Waters of the U.S. Impact Plan Drawings (Appendix III).
Compliance with applicable sections of the Endangered Species Act (ESA) of 1973 (16
USC 1531 -1543) was achieved in connection with the original project corridor
assessment, which occupies the area within and adjacent to the proposed re- route.
The appropriate field assessments were conducted over a period ranging from September
2010 through January 2012, with additional, small -scale field investigation subsequently
conducted at targeted areas as minor route changes were implemented, or further
assessment was deemed necessary. Similarly, S &ME conducted a cultural resources
assessment of the re -route corridor, including excavation of shovel -tests at 100 meter
intervals, and concluded that no cultural and archeological resources or structures greater
than 50 years old would likely be affected by the proposed re- routes.
ADDITIONAL REGULATORY INFORMATION
Following construction, the stream crossings will be restored to a stable grade and
contour, and the banks stabilized with coir fabric and a native riparian seed mix. The
proposed project will not result in permanent changes in pre - construction elevation
contours or stream pattern or profile, and rip -rap will not be applied to the affected banks.
The project will employ appropriate sediment and erosion control practices as outlined in
the most recent version of the "North Carolina Sediment and Erosion Control Planning
and Design Manual." A Sediment and Erosion Control plan for the work has been
prepared by McKim & Creed, and will be appropriately approved by the NCDENR —
Division of Land Quality, prior to conducting work subject to this revision.
The project should not require mitigation, as all impacts specified herein are temporary.
Mitigation has also been provided by avoidance and minimization procedures

Request for Additional Project Revision S &ME Project No. 1357 -10 -022
PNG Line # 170 Protect March 1, 2013
implemented during the design phase of the proposed project. Impacts to streams have
been minimized by crossing the subject streams in a perpendicular manner, and reducing
both the temporary construction and permanent maintained corridor widths to the
minimum necessary to adequately construct and maintain the project.
Thank you for your time and consideration of this request. Again, please note that
because the current revision reduces overall stream impacts by 218 lf. If you have
questions, please feel free to contact us at 704.523.4726.
Sincerely,
S &ME
Crystal Fox Joey Lawler, P.W.S.
Staff Professional Senior Project Manager
cfoxgsmeinc.com jlawlergsmeinc.com
Senior Reviewed by Julie Bennett - Hudel, P.G., LEED AP
Attachments:
• Figures
• Appendix I — Revised Stream Impact Table
• Appendix II - Site Photographs
• Appendix III — Revised Jurisdictional Waters of the U.S. Impact Plan (Sheet 21 of
24)
4

FIGURES

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� Couplty�- al well
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Streams 7.1 and 7.2
Crossing Locations
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v
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REFERENCE:
THE BACKGROUND GEOGRAPHIC INFORMATION SYSTEMS (GIS) LAYERS WERE OBTAINED FROM THE
STREETMAP USA DATASEf. THE PROPOSED PIPELINE ROUTE WAS DERIVED FROM DATA PROVIDED BY
MCKIM AND CREED, INC. PLEASE NOTE THIS MAP IS FOR INFORMATIONAL PURPOSES ONLY. IT IS NOT
Proposed Alternate Crossing Location
p g
MEANT FOR DESIGN, LEGAL, OR ANY OTHER USES. THERE ARE NO GUARANTEES ABOUT ITS
ACCURACY S&ME, INC. ASSUMES NO RESPONSIBILITY FOR ANY DECISION MADE OR ANY ACTIONS
z Pipeline Route
TAKEN BY THE USER BASED UPON THIS INFORMATION.
SCALE: AS SHOWN
SITE VICINITY MAP
FIGURE
DATE:
Second Request for Revison to
NO.
10.10.12
S &ME
Crossing Method
DRAWN BY: CJF
-`
==
PNG -Line # 170
WWW.SMEINC.COM
Multiple Counties North Carolina
CHECKED BY: JBH
PROJECT NO: 1357 -10 -022

APPENDIX I
Revised Stream Impact Table

REVISED STREAM IMPACT TABLE
Stream ID
Sheet No.
# of 24
Classification
Temp. Impact
If
Perpendicular
Crossing?
Crossing Type
1
-
RPW Seasonal
0
N/A
Avoided
2
7,8
RPW Year -round
76
Yes
Conventional
2 (Second Crossing)
7,11
RPW Year -round
107
Yes
Conventional
2.1
12
RPW Year -round
51
Yes
Conventional
3 (Original Crossing Location)
-
RPW Year -round
0
N/A
Avoided
3.1 (Original)
-
RPW Year -round
0
N/A
Avoided
3 (Revised Crossing Location)
14
RPW Year -round
87
Yes
Conventional
3.1 (Rev)
14A
RPW Year -round
99
No
Conventional
3.2
15
RPW Year -round
86
Yes
Conventional
4
15
RPW Year -round
0
N/A
Avoided
5
16
RPW Year -round
89
Yes
Conventional
5.1
18
RPW Year -round
65
N/A
N/A - HDD Stringing Area
6
19
RPW Year -round
75
Yes
Conventional
7
20
RPW Year -round
89
Yes
Conventional
7.1
21
RPW Year -round
80
Yes
Conventional
7.2
21
RPW Year -round
76
Yes
Conventional
8
22
RPW Year -round
61
Yes
Conventional
8.1
22A
RPW - Seasonal
76
Yes
Conventional
9
23
RPW Year -round
82
Yes
Conventional
10
24
RPW Year -round
88
Yes
Conventional
Total:
1,287
Note: Impact Sheet Nos. 6 and 9 were eliminated, as the proposed re- routes deviated from areas previously depicted on those sheets.
= Stream subject to this Revision

APPENDIX II
Site Photographs

Photo 1: View of re -route approaching south to its origin
Photo 3: View of Stream 7.1 at proposed crossing location.
Photo 4: View of Stream S7.2, facing downstream
� � t
Photo 2: View of re -route facing north, approaching Stream S7.2.
Photo 4: Second view of Stream 7.1 at proposed crossing
location.
Photo 5: View of Stream S7.2, facing upstream
SITE PHOTOGRAPHS
Request for Additional Revision
Piedmont Natural Gas — Line # 170
Multiple Counties, North Carolina
Project No.: 1357 -10 -022 PHOTO PAGE 1

APPENDIX III
Revised Jurisdictional Waters of the U.S.
Impact Plan (Sheet 21 of 24)

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