19970175 Ver 4_Approval Letter_20220107

SENT VIA ELECTRONIC MAIL ONLY: NO HARD COPY WILL BE MAILED

January 07, 2022

DWR 97-0175 V4
Rutherford County

Duke Energy Carolinas, LLC
Attn: Elizabeth Glenn
Email: [e-mail]

Subject: APPROVAL OF 401 WATER QUALITY CERTIFICATION
Cliffside Unit 5 Switchyard

Dear Ms. Glenn:
Attached hereto is a copy of Certification No. 4586 issued to Duke Energy Carolinas, LLC, dated January 07,
2022. This approval is for the purpose and design described in your application. The plans and
specifications for this project are incorporated by reference as part of this Water Quality Certification. If
you change your project, you must notify the Division and you may be required to submit a new
application package with the appropriate fee. If the property is sold, the new owner must be given a copy
of this Certification and is responsible for complying with all conditions. [15A NCAC 02H .0507(d)(2)].
This Water Quality Certification does not relieve the permittee of the responsibility to obtain all other
required Federal, State, or Local approvals before proceeding with the project, including those required
by, but not limited to, Sediment and Erosion Control, Non-Discharge, Water Supply Watershed, and
Trout Buffer regulations.
This Water Quality Certification neither grants nor affirms any property right, license, or privilege in any
lands or waters, or any right of use in any waters. This Water Quality Certification does not authorize
any person to interfere with the riparian rights, littoral rights, or water use rights of any other person
and does not create any prescriptive right or any right of priority regarding any usage of water. This
Water Quality Certification shall not be interposed as a defense in any action respecting the
determination of riparian or littoral rights or other rights to water use. No consumptive user is deemed
by virtue of this Water Quality Certification to possess any prescriptive or other right of priority with
respect to any other consumptive user.
Upon the presentation of proper credentials, the Division may inspect the property.
This Water Quality Certification shall expire on the same day as the expiration date of the corresponding
Section 404 Permit. The conditions shall remain in effect for the life of the project, regardless of the
expiration date of this Water Quality Certification.
DocuSign Envelope ID: B1C1B132-C8ED-46D3-BB65-CAAD2832E389
Duke Energy Carolinas, Cliffside Unit Switchyard
DWR # 97-0175 V4
Individual Certification #WQC004586
Page 2 of 8

Non-compliance with or violation of the conditions herein set forth may result in revocation of this
Water Quality Certification for the project and may also result in criminal and/or civil penalties.
If you are unable to comply with any of the conditions of this Water Quality Certification you must notify
the Asheville Regional Office within 24 hours (or the next business day if a weekend or holiday) from the
time the permittee becomes aware of the circumstances.
The permittee shall report to the Asheville Regional Office any noncompliance with, and/or any violation
of, stream or wetland standards [15A NCAC 02B .0200] including but not limited to sediment impacts to
streams or wetlands. Information shall be provided orally within 24 hours (or the next business day if a
weekend or holiday) from the time the permittee became aware of the non-compliance circumstances.

This approval and its conditions are final and binding unless contested [G.S. 143-215.5].
This Certification can be contested as provided in Chapter 150B of the North Carolina General Statutes by
filing a Petition for a Contested Case Hearing (Petition) with the North Carolina Office of Administrative
Hearings (OAH) within sixty (60) calendar days. Requirements for filing a Petition are set forth in Chapter
150B of the North Carolina General Statutes and Title 26 of the North Carolina Administrative Code.
Additional information regarding requirements for filing a Petition and Petition forms may be accessed at
http://www.ncoah.com/ or by calling the OAH Clerk’s Office at [phone].
One (1) copy of the Petition must also be served to the North Carolina Department of Environmental
Quality:
William F. Lane, General Counsel
Department of Environmental Quality
1601 Mail Service Center
Raleigh, NC 27699-1601

This letter completes the Division’s review under section 401 of the Clean Water Act and 15A NCAC
02H .0500. Please contact Mitchell Anderson at 828-296-4662 or [e-mail] if you
have any questions or concerns.

Sincerely,

G. Landon Davidson, P.G.
Regional Supervisor
Water Quality Regional Operations Section
Division of Water Resources, NCDEQ-ARO

DocuSign Envelope ID: B1C1B132-C8ED-46D3-BB65-CAAD2832E389
Duke Energy Carolinas, Cliffside Unit Switchyard
DWR # 97-0175 V4
Individual Certification #WQC004586
Page 3 of 8

ec: Richard Harmon, Wood PLC
Richard Hinder, Wood PLC
David Brown, USACE Asheville Regulatory Field Office
Andrea Leslie, North Carolina Wildlife Resources Commission
Todd Bowers, EPA
DWR 401 & Buffer Permitting Branch Electronic file

DocuSign Envelope ID: B1C1B132-C8ED-46D3-BB65-CAAD2832E389
Duke Energy Carolinas, Cliffside Unit Switchyard
DWR # 97-0175 V4
Individual Certification #WQC004586
Page 4 of 8

NORTH CAROLINA 401 WATER QUALITY CERTIFICATION

CERTIFICATION #4586 is issued in conformity with the requirements of Section 401, Public Laws 92-500
and 95-217 of the United States and subject to North Carolina’s Regulations in 15 NCAC 02H .0500 and
15A NCAC 02B .0200, to Duke Energy Carolinas, LLC, who have authorization for the impacts listed below,
as described within your application received by the N.C. Division of Water Resources (Division) on August
30, 2021, with subsequent information on November 12, 2021, and December 22, 2021, and by Public
Notice issued by the Division on September 08, 2021.

The State of North Carolina certifies that this activity will comply with water quality requirements and
the applicable portions of Sections 301, 302, 303, 306, 307 of the Public Laws 92-500 and PL 95-217 if
conducted in accordance with the application, the supporting documentation, and conditions
hereinafter set forth.

The following impacts are hereby approved. No other impacts are approved, including incidental
impacts. [15A NCAC 02H .0506(b)]
Type of Impact

Amount Approved (units)
Permanent
Amount Approved (units)
Temporary
Streams
S1 67 (linear feet) 0 (acres)

This approval requires you to follow the conditions listed in the certification below.

CONDITIONS OF CERTIFICATION [15A NCAC 02H .0507(c)]:

1. All wetlands, streams, and surface waters located within 50 feet of the construction area on the
project site shall be clearly marked (example-orange fabric fencing) prior to any land disturbing
activities and must be maintained on the property until the project phase is completed.
Citation: 15A NCAC 02H .0506(b)(2) and 15A NCAC 02H .0507(c)

2. If this Water Quality Certification is used to access residential, commercial or industrial building
sites, then all parcels owned by the permittee that are part of the single and complete project
authorized by this Certification must be buildable without additional impacts to streams or
wetlands.
Citation: 15A NCAC 02H .0502(a); 15A NCAC 02H .0506(b); and 15A NCAC 02H .0507(c)
3. The permittee shall report to the DWR Asheville Regional Office any noncompliance with, and/or any
violation of, stream or wetland standards [15A NCAC 02B .0200], including but not limited to sediment
impacts to streams or wetlands. Information shall be provided orally within 24 hours (or the next
business day if a weekend or holiday) from the time the permittee became aware of the non-
compliance circumstances. Citation: 15A NCAC 02H .0506(b); 15A NCAC 02H .0507(c)
DocuSign Envelope ID: B1C1B132-C8ED-46D3-BB65-CAAD2832E389
Duke Energy Carolinas, Cliffside Unit Switchyard
DWR # 97-0175 V4
Individual Certification #WQC004586
Page 5 of 8

4. No waste, spoil, solids, or fill of any kind shall occur in wetlands or waters beyond the footprint of
the approved impacts (including temporary impacts).
Citation: 15A NCAC 02H .0506; 15A NCAC 02H .0507(c)
5. When applicable, all construction activities shall be performed and maintained in full compliance
with G.S. Chapter 113A Article 4 (Sediment and Pollution Control Act of 1973). Regardless of
applicability of the Sediment and Pollution Control Act, all projects shall incorporate appropriate
Best Management Practices for the control of sediment and erosion so that no violations of state
water quality standards, statutes, or rules occur.
Design, installation, operation, and maintenance of all sediment and erosion control measures shall
be equal to or exceed the requirements specified in the most recent version of the North Carolina
Sediment and Erosion Control Manual, or for linear transportation projects, the North Caroline
Department of Transportation Sediment and Erosion Control Manual.
All devices shall be maintained on all construction sites, borrow sites, and waste pile (spoil) sites,
including contractor-owned or leased borrow pits associated with the project. Sufficient materials
required for stabilization and/or repair of erosion control measures and stormwater routing and
treatment shall be on site at all times.
For borrow pit sites, the erosion and sediment control measures shall be designed, installed,
operated, and maintained in accordance with the most recent version of the North Carolina Surface
Mining Manual. Reclamation measures and implementation shall comply with the reclamation in
accordance with the requirements of the Sedimentation Pollution Control Act and the Mining Act of
1971.
Citation: 15A NCAC 02H .0506(b); 15A NCAC 02H .0507(c); 15A NCAC02B .0200; 15A NCAC
02B .0231
6. Sediment and erosion control measures shall not be installed in wetland or waters except within the
footprint of temporary or permanent impacts otherwise authorized by this Certification. If placed
within authorized impact areas, then placement of such measures shall not be conducted in a
manner that results in dis-equilibrium of any wetlands, streambeds, or streambanks. Any silt fence
installed within wetlands shall be removed from wetlands and the natural grade restored within two
(2) months of the date that DEMLR or locally delegated program has released the specific area
within the project to ensure wetland standards are maintained upon completion of the project.
Citation: 15A NCAC 02H .0506(b); 15A NCAC 02H .0507(c); 15A NCAC 02B .0200; 15A NCAC
02B .0231
7. Erosion control matting that incorporates plastic mesh and/or plastic twine shall not be used along
streambanks or within wetlands.
Citation: 15A NCAC 02H .0506(b); 15A NCAC 02H .0507(c)
8. If the project is covered by NPDES Construction Stormwater Permit Number NCG010000 or NPDES
Construction Stormwater Permit Number NCG250000, full compliance with permit conditions
including the erosion & sedimentation control plan, inspections and maintenance, self-monitoring,
record keeping and reporting requirements is required.
Citation: 15A NCAC 02H .0506(b); 15A NCAC 02H .0507(c); 15A NCAC 02B .0200; 15A NCAC 02B .0231
DocuSign Envelope ID: B1C1B132-C8ED-46D3-BB65-CAAD2832E389
Duke Energy Carolinas, Cliffside Unit Switchyard
DWR # 97-0175 V4
Individual Certification #WQC004586
Page 6 of 8

9. All work in or adjacent to streams shall be conducted so that the flowing stream does not come in
contact with the disturbed area. Approved best management practices from the most current
version of the NC Sediment and Erosion Control Manual, or the NC Department of Transportation
Construction and Maintenance Activities Manual, such as sandbags, rock berms, cofferdams, and
other diversion structures shall be used to minimize excavation in flowing water.
Citation: 15A NCAC 02H .0506(b); 15A NCAC 02H .0507(c); 15A NCAC 02B .0200
10. Culverts shall be designed and installed in such a manner that the original stream profiles are not
altered and allow for aquatic life movement during low flows. The dimension, pattern, and profile
of the stream above and below a pipe or culvert shall not be modified by widening the stream
channel or by reducing the depth of the stream in connection with the construction activity. The
width, height, and gradient of a proposed culvert shall be such as to pass the average historical low
flow and spring flow without adversely altering flow velocity. If the width of the culvert is wider than
the stream channel, the culvert shall include multiple boxes/pipes, baffles, benches and/or sills to
maintain the natural width of the stream channel. If multiple culverts/pipes/barrels are used, low
flows shall be accommodated in one culvert/pipe and additional culverts/pipes shall be installed
such that they receive only flows above bankfull.
Placement of culverts and other structures in streams shall be below the elevation of the streambed
by one foot for all culverts with a diameter greater than 48 inches, and 20% of the culvert diameter
for culverts having a diameter less than or equal to 48 inches, to allow low flow passage of water
and aquatic life. If the culvert outlet is submerged within a pool or scour hole and designed to
provide for aquatic passage, then culvert burial into the streambed is not required.
For structures less than 72” in diameter/width, and topographic constraints indicate culvert slopes
of greater than 2.5% culvert burial is not required, provided that all alternative options for flattening
the slope have been investigated and aquatic life movement/connectivity has been provided when
possible (e.g. rock ladders, cross-vanes, sills, baffles etc.). Notification, including supporting
documentation to include a location map of the culvert, culvert profile drawings, and slope
calculations, shall be provided to DWR 30 calendar days prior to the installation of the culvert.
When bedrock is present in culvert locations, culvert burial is not required, provided that there is
sufficient documentation of the presence of bedrock. Notification, including supporting
documentation such as a location map of the culvert, geotechnical reports, photographs, etc. shall
be provided to DWR a minimum of 30 calendar days prior to the installation of the culvert. If
bedrock is discovered during construction, then DWR shall be notified by phone or email within 24
hours of discovery.
Installation of culverts in wetlands shall ensure continuity of water movement and be designed to
adequately accommodate high water or flood conditions. When roadways, causeways, or other fill
projects are constructed across FEMA-designated floodways or wetlands, openings such as culverts
or bridges shall be provided to maintain the natural hydrology of the system as well as prevent
constriction of the floodway that may result in destabilization of streams or wetlands.
The establishment of native woody vegetation and other soft stream bank stabilization techniques
shall be used where practicable instead of rip-rap or other bank hardening methods.
Citation: 15A NCAC 02H .0506(b); 15A NCAC 02H .0507(c)
DocuSign Envelope ID: B1C1B132-C8ED-46D3-BB65-CAAD2832E389
Duke Energy Carolinas, Cliffside Unit Switchyard
DWR # 97-0175 V4
Individual Certification #WQC004586
Page 7 of 8

11. Bridge deck drains shall not discharge directly into streams or wetlands. Stormwater shall be
directed across the bridge and pre-treated through site-appropriate means to the maximum extent
practicable (e.g. grassed swales, pre-formed scour holes, vegetated buffers, etc.) before entering
streams or wetlands.
Citation: 15A NCAC 02H .0506(b); 15A NCAC 02H .0507(c)
12. Application of fertilizer to establish planted/seeded vegetation within disturbed riparian areas
and/or wetlands shall be conducted at agronomic rates and shall comply with all other Federal,
State and Local regulations. Fertilizer application shall be accomplished in a manner that minimizes
the risk of contact between the fertilizer and surface waters.
Citation: 15A 02H .0506(b); 15A NCAC 02H .0507(c); 15A NCAC 02B .0200; 15A NCAC 02B .0231
13. If concrete is used during construction, then all necessary measures shall be taken to prevent direct
contact between uncured or curing concrete and waters of the state. Water that inadvertently
contacts uncured concrete shall not be discharged to waters of the state.
Citation: 15A 02H .0506(b); 15A NCAC 02H .0507(c); 15A NCAC 02B .0200; 15A NCAC 02B .0231
14. All proposed and approved temporary fill and culverts shall be removed and the impacted area shall
be returned to natural conditions within 60 calendar days after the temporary impact is no longer
necessary. The impacted areas shall be restored to original grade, including each stream’s original
cross-sectional dimensions, planform pattern, and longitudinal bed profile. All temporarily impacted
sites shall be restored and stabilized with native vegetation.
Citation: 15A NCAC 02H.0506(b); 15A NCAC 02H .0507(c)
15. All proposed and approved temporary pipes/culverts/rip-rap pads etc. in streams or wetlands shall
be installed as outlined in the most recent edition of the North Carolina Sediment and Erosion
Control Planning and Design Manual or the North Carolina Surface Mining Manual or the North
Carolina Department of Transportation Best Management Practices for Construction and
Maintenance Activities so as not to restrict stream flow or cause dis-equilibrium during use of this
Certification.
Citation: 15A NCAC 02H .0506(b); 15A NCAC 02H .0507(c)
16. Any rip-rap required for proper culvert placement, stream stabilization, or restoration of temporarily
disturbed areas shall be restricted to the area directly impacted by the approved construction
activity. All rip-rap shall be placed such that the original streambed elevation and streambank
contours are restored and maintained and shall consist of clean rock or masonry material free of
debris or toxic pollutants. Placement of rip-rap or other approved materials shall not result in de-
stabilization of the stream bed or banks upstream or downstream of the area or be installed in a
manner that precludes aquatic life passage.
Citation: 15A NCAC 02H .0506(b); 15A NCAC 02H .0507(c)
17. Any rip-rap used for stream or shoreline stabilization shall be of a size and density to prevent
movement by wave, current action, or stream flows, and shall consist of clean rock or masonry
material free of debris or toxic pollutants. Rip-rap shall not be installed in the streambed except in
specific areas required for velocity control and to ensure structural integrity of bank stabilization
measures.
Citation: 15A NCAC 02H .0506(b); 15A NCAC 02H .0507(c); 15A NCAC 02B .0201
DocuSign Envelope ID: B1C1B132-C8ED-46D3-BB65-CAAD2832E389
Duke Energy Carolinas, Cliffside Unit Switchyard
DWR # 97-0175 V4
Individual Certification #WQC004586
Page 8 of 8

18. All mechanized equipment operated near surface waters shall be inspected and maintained
regularly to prevent contamination of surface waters from fuels, lubricants, hydraulic fluids, or other
toxic materials. Construction shall be staged in order to minimize the exposure of equipment to
surface waters to the maximum extent practicable. Fueling, lubrication, and general equipment
maintenance shall be performed in a manner to prevent, to the maximum extent practicable,
contamination of surface waters by fuels and oils.
Citation: 15A NCAC 02H .0506(b); 15A NCAC 02H .0507(c); 15A NCAC 02B .0200; 15A NCAC
02B .0231
19. Heavy equipment working in wetlands shall be placed on mats or other measures shall be taken to
minimize soil disturbance and compaction.
Citation: 15A NCAC 02H .0506(b); 15A NCAC 02H .0507(c); 15A NCAC 02B .0231
20. In accordance with 143-215.85(b), the permittee shall report any petroleum spill of 25 gallons or
more; any spill regardless of amount that causes a sheen on surface waters; any petroleum spill
regardless of amount occurring within 100 feet of surface waters; and any petroleum spill less than
25 gallons that cannot be cleaned up within 24 hours.
Citation: 15A NCAC 02H .0507(c); N.C.G.S 143-215.85(b)
21. The permittee and their authorized agents shall conduct all activities in a manner consistent with
State water quality standards (including any requirements resulting from compliance with §303(d)
of the Clean Water Act), and any other appropriate requirements of State and Federal Law.
Citation: 15A NCAC 02H .0506(b); 15A NCAC 02H .0507(c)
22. The permittee shall require its contractors and/or agents to comply with the terms and conditions of
this permit in the construction and maintenance of this project, and shall provide each of its
contractors and/or agents associated with the construction or maintenance of this project with a
copy of this Water Quality Certification. A copy of this Water Quality Certification shall be available
at the project site during the construction and maintenance of this project.
Citation: 15A NCAC 02H .0506(b); 15A NCAC 02H .0507(c)

This approval to proceed with your proposed impacts or to conduct impacts to waters as depicted in
your application shall expire upon expiration of the 404 or CAMA Permit. The conditions in effect on the
date of issuance shall remain in effect for the life of the project, regardless of the expiration date of this
Certification. [15A NCAC 02H .0507(c)]

This, the 7th day of January 2022

G. Landon Davidson, P.G.
Regional Supervisor
Water Quality Regional Operations Section
Division of Water Resources, NCDEQ-ARO
GLD/ma
4586
DocuSign Envelope ID: B1C1B132-C8ED-46D3-BB65-CAAD2832E389