20171396 Ver 1_More Info Requested_20171215

Strickland, Bev
From: Annino, Amy M
Sent: Friday, December 15, 2017 10:13 AM
To: '[e-mail]'
Subject: Request for Additional Information, PSNC Cliffside Pipeline Project (DWR Project #
20171396)
On October 31, 2017, the Division of Water Resources (Division) received your application dated October 27, 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:
1. The October 27, 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 3 of Water
Quality Certification 4133. The Division understands the difficulty in re -orienting crossings within, or adjacent to,
the existing overhead electric utility line. 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. The October 27, 2017 submittal indicates that the proposed project will not meet Condition 4 of Water Quality
Certification 4133, which requires that the construction corridor be limited to 50 feet. The submittal proposes to
limit the construction corridor to 65 feet at stream and wetland crossings, with the exception of one crossings
that will require additional temporary workspace in excess of 170 feet. Please provide additional detail
regarding the need for the additional 15 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 S11/WF, 520, S21/WN. 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. Proposed crossing S14 appears to cross the same stream two times, followed by immediately crossing 513, resulting in
what appears to be avoidable impacts. Please reconfigure the orientation of the pipeline to one crossing of the stream
or clearly explain why two crossings of the same stream are
unavoidable. [15A NCAC 02H .0506(f) and (g)]
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 January 15, 2018.
Please contact me if you have any questions or concerns.
Amy Annino

Environmental Specialist — Asheville Regional Office
Water Quality Regional Operations Section
NCDEQ — Division of Water Resources
828 296 4656 office
amy.annino(cancdenr.gov
2090 U.S. Hwy. 70
Swannanoa, N.C. 28711
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