20150994 Ver 3_More Info Requested - Email_20170202

Moore, Andrew W
From: Moore, Andrew W
Sent: Thursday, February 02, 2017 11:50 AM
To: '[e-mail]'
Cc: Mitchell, Robert K; Montalvo, Sheri A; '[e-mail]'
Subject: Request for Additional Information, PSNC Line T-01 Replacement Project Phase II (DWR
Project #20150994 V3)
Joey,
On January 11, 2017, the Division of Water Resources (Division) received your application dated January 9, 2017,
requesting a 401 Water Quality Certification from the Division for the subject project. The Division has determined that
your application is incomplete and cannot be processed. The application is on hold until all of the following items are
addressed:
The January 9, 2017 submittal indicates that all streams within the proposed greenfield segment of the project
cannot be crossed at near -perpendicular angles (i.e. 75-105 degrees) as required in Condition 10 of Water
Quality Certification 3884. The Division understands the difficulty in re -orienting crossings within, or adjacent to,
the existing gas line easement. However, it is not clear why the crossings cannot meet the noted tolerance
within the greenfield segment and/or why the greenfield segment was not designed to cross streams at near -
perpendicular angles. Please specify which stream crossings within the greenfield segment cannot meet this
threshold and provide additional detail as to why there are no practical alternatives to the proposed crossing
orientations. [15A NCAC 02H .0506(f) and (g)]
2. Proposed crossing SD03 appears to cross the same stream three times resulting in what appears to be avoidable
impacts. Please re -configure the orientation of the pipeline to one crossing of the stream or clearly explain why
three crossings of the same stream are unavoidable. [15A NCAC 02H .0506(f) and (g)]
The January 9, 2017 submittal indicates that the proposed project will not meet Condition 16 of Water Quality
Certification 3884, which requires that the construction corridor be limited to 40 feet. The submittal proposes to
limit the construction corridor to 80 feet at stream and wetland crossings, with the exception of four crossings
that will require additional temporary workspace in excess of 80 feet. The construction corridor for Phase I of
the Line T-01 pipeline replacement project was limited to 50 feet at stream and wetland crossings. It is not clear
why an additional 30 feet of construction corridor is necessary for Phase II when Phase I was successfully
completed with a 50 -foot construction corridor at stream and wetland crossings. Please provide additional detail
regarding the need for the additional 30 feet of construction corridor and what type of activities will occur
within the construction corridor adjacent to streams and wetlands. [15A NCAC 02H .0506(f) and (g)]
4. There appear to be pre-existing culverts in the vicinity of stream crossings SA08, SA10, WA02/SA19, SA27, SA28,
WA14/SA38, WA45/SA69, SA80, SA81A, SA104, and SA117. What is the pipeline construction approach in these
areas with regard to the pre-existing culvert? For example, will the pipeline be placed under the culvert, will the
culvert be permanently removed, temporarily removed and returned to its original location, etc...? [15A NCAC
02H .0502(a)(4)]
5. There are two proposed pipe centerlines and/or HDD bores depicted on Figures 67 (SA17), 71 (SA22), 120
(SA81A), 121 (SC03A), 122 (SA87), 132 (SA100), 170 (WG03), 171 (WG04), 193 (WC01), 194 (WA65), and 196
(WA07). Can you clarify why two new pipe centerlines and/or HDD bores are depicted at these locations? [15A
NCAC O2H .0502(b)]

Pursuant to Title 15A NCAC 02H .0502(e), the applicant shall furnish all of the above requested information for the
proper consideration of the application. Please provide a response by February 28, 2017.
If you have any questions, do not hesitate to call me.
Thanks,
Andrew W. Moore, P.G.
Environmental Specialist — Asheville Regional Office
Water Quality Regional Operations Section
NCDEQ — Division of Water Resources
828 296 4684 office
email: [e-mail]
2090 U.S. Hwy. 70
Swannanoa, N.C. 28778
0 - ~'Nothing Compares
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