20220790_v2_Timbermill_Wind_Farm_Chowan_401_Individual-final

North Carolina Department of Environmental Quality Division of Water Resources
512 North Salisbury Street 1617 Mail Service Center Raleigh, North Carolina 27699-1617
919.707.9000

May 24, 2024

DWR # 20220790 v2
Chowan County

Timbermill Wind, LLC
Attn: Ken Young
120 Garrett Street, Suite 700
Charlottesville, VA 22902

(sent via email to [e-mail])

Subject: Approval of Individual 401 Water Quality Certification
Timbermill Wind
USACE Action ID. No. SAW-2021-00056

Dear Mr. Young:

Attached hereto is a copy of Certification No. WQC006869 issued to Ken Young and Apex Clean Energy,
dated May 24, 2024. This Certification replaces the Certification issued on December 19, 2022. This
Certification is being issued pursuant to a modification request submitted on May 17, 2024 to
incorporate design changes in order to resolve a Permit Condition Violation issued by the U.S. Army
Corp. of Engineers. The modifications include electrical design changes/construction design changes and
turning radius revisions for turbine components.

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.
North Carolina Department of Environmental Quality Division of Water Resources
512 North Salisbury Street 1617 Mail Service Center Raleigh, North Carolina 27699-1617
919.707.9000

Timbermill Wind
DWR# 20220790 v2
Individual Certification #WQC006869
Page 2 of 12

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.

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 Washington 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 Washington 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 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].

A party filing a Petition must serve a copy of the Petition on:

William F. Lane, General Counsel
Department of Environmental Quality
1601 Mail Service Center
Raleigh, NC 27699-1601

If the party filing the Petition is not the permittee, then the party must also serve the recipient of the
Certification in accordance with N.C.G.S 150B-23(a).

This letter completes the Division’s review under section 401 of the Clean Water Act and 15A NCAC 02H
.0500. Please contact Stephanie Goss at 919-707-9013 or [e-mail] if you have any
questions or concerns.

Sincerely,

Stephanie Goss, Supervisor
401 & Buffer Permitting Branch

North Carolina Department of Environmental Quality Division of Water Resources
512 North Salisbury Street 1617 Mail Service Center Raleigh, North Carolina 27699-1617
919.707.9000

Timbermill Wind
DWR# 20220790 v2
Individual Certification #WQC006869
Page 3 of 12

Electronic cc: Hank Seltzer, Apex Clean Energy
Anthony Scarbraugh, U.S. Army Corps of Engineers
DWR 401 & Buffer Permitting Branch Electronic file

North Carolina Department of Environmental Quality Division of Water Resources
512 North Salisbury Street 1617 Mail Service Center Raleigh, North Carolina 27699-1617
919.707.9000

Timbermill Wind
DWR# 20220790 v2
Individual Certification #WQC006869
Page 4 of 12

NORTH CAROLINA 401 WATER QUALITY CERTIFICATION

CERTIFICATION #WQC006869 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 Ken Young and Apex Clean Energy, who have authorization for the impacts
listed below, as described within your application received by the N.C. Division of Water Resources
(Division) on May 17, 2024 and by Public Notice issued by the U. S. Army Corps of Engineers on April 28,
2022.

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
Amount Approved
(units) Conversion
Stream (See attached Stream Impact Table for Site IDs and modifications)
Site 1 (SB) 0 (linear feet) 60 (linear feet) 0 (linear feet)
Site 2 (SC) 0 (linear feet) 77 (linear feet) 0 (linear feet)
Site 3 (SD) 0 (linear feet) 120 (linear feet) 0 (linear feet)
Site 4 (SG) 0 (linear feet) 60 (linear feet) 0 (linear feet)
Site 5 (SH) 0 (linear feet) 268 (linear feet) 0 (linear feet)
Site 6 (SI) 96 (linear feet) 33 (linear feet) 0 (linear feet)
Site 7 (SK) 0 (linear feet) 34 (linear feet) 0 (linear feet)
Site (TGSD) 0 (linear feet) 44 (linear feet) 0 (linear feet)
Total 96 (linear feet) 696 (linear feet) 0 (linear feet)
Wetland (See attached Wetland Impact Table for Site IDs and modifications)
Site 1 (WB) 0 (acres) 0 (acres) 0.80 (acres)
Site 2 (WC) 0 (acres) 0.01 (acres) 0.94 (acres)
Site 3 (WG) 13.42 (acres) 21.53 (acres) 131.04 (acres)
Site 4 (WH) 1.74 (acres) 0.57 (acres) 8.61 (acres)
Site 5 (WI) 0.85 (acres) 4.34 (acres) 6.82 (acres)
Site 6 (WJ) 1.39 (acres) 0.32 (acres) 6.18 (acres)
Site 7 (WK) 0 (acres) 0.99 (acres) 0 (acres)
Site 8 (WL) 0 (acres) 0.03 (acres) 0 (acres)
Site 9 (WN) 0 (acres) 11.36 (acres) 1.81 (acres)
Site 10 (WO) 4.34 (acres) 10.79 (acres) 1.42 (acres)
Site 11 (TGWD) 0 (acres) 0.01 (acres) 0 (acres)
Total 21.74 (acres) 48.92 (acres) 157.62 (acres)
North Carolina Department of Environmental Quality Division of Water Resources
512 North Salisbury Street 1617 Mail Service Center Raleigh, North Carolina 27699-1617
919.707.9000
Timbermill Wind
DWR# 20220790 v2
Individual Certification #WQC006869
Page 5 of 12
Type of Impact Amount Approved
(units) Permanent
Amount Approved (units)
Temporary
Amount Approved
(units) Conversion
Open Waters (See attached Ditched Impact Table for Site IDs and modifications)
Jurisdictional
Ditches
19,049 (sq ft) 233,445 (sq ft) 0 (sq ft)
Total 19,049 (sq ft) 233,445 (sq ft) 0 (sq ft)
This approval requires you to follow the conditions listed in the certification below.
CONDITIONS OF CERTIFICATION [15A NCAC 02H .0507(c)]:
1.The Division has received Mitigation Credit Transfer Certificates for 191 linear feet of stream
credits purchased from The Great Dismal Swamp Restoration Bank, LLC on September 8, 2023.
The Division has received Mitigation Credit Transfer Certificates for 25.58 acres of wetland
credits purchased from The Great Dismal Swamp Restoration Bank, LLC on May 11, and
September 8, 2023. These credits satisfy the mitigation requirements for this project [15A NCAC
02H .0506 (c)]
Compensatory Mitigation
Required
Bank Sponsor River and Sub-basin
Number
Stream
191 (linear feet)
Paid on September 8, 2023
Great Dismal Swamp
Restoration Bank, LLC
Chowan
03010205
Wetlands 25.58 (acres)
Paid on May 11, 2023 &
September 8, 2023
Great Dismal Swamp
Restoration Bank, LLC
Chowan
03010205
Citation: 15A NCAC 02H .0506(c)
Justification: A project that affects waters shall not be permitted unless the existing uses, and the
water quality to protect such uses, are protected. In determining that the proposed activity will
comply with state water quality standards (including designated uses, numeric criteria, narrative
criteria and the state’s antidegradation policy), the project must provide for replacement of
existing uses through compensatory mitigation.
2.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)
Justification: Surface water quality standards require that conditions of waters be suitable for all
best uses provided for in state rule (including, at minimum: aquatic life propagation, survival,
and maintenance of biological integrity; wildlife; secondary contact recreation; agriculture); and
that activities must not cause water pollution that precludes any best use on a short-term or
long -term basis.
North Carolina Department of Environmental Quality Division of Water Resources
512 North Salisbury Street 1617 Mail Service Center Raleigh, North Carolina 27699-1617
919.707.9000

Timbermill Wind
DWR# 20220790 v2
Individual Certification #WQC006869
Page 6 of 12

3. 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.
Citation: 15A NCAC 02H .0506(b); 15A NCAC 02H .0507(c); 15A NCAC02B .0200; 15A NCAC 02B
.0231
Justification: A project that affects waters shall not be permitted unless the existing uses, and the
water quality to protect such uses, are protected. Activities must not cause water pollution that
precludes any best use on a short-term or long-term basis. As cited in Stream Standards: (12)
Oils, deleterious substances, or colored or other wastes: only such amounts as shall not render
the waters injurious to public health, secondary recreation, or to aquatic life and wildlife, or
adversely affect the palatability of fish, aesthetic quality, or impair the waters for any designated
uses; and (21) turbidity in the receiving water shall not exceed 50 Nephelometric Turbidity Units
(NTU) in streams not designated as trout waters and 10 NTU in streams, lakes, or reservoirs
designated as trout waters; for lakes and reservoirs not designated as trout waters, the turbidity
shall not exceed 25 NTU; if turbidity exceeds these levels due to natural background conditions,
the existing turbidity level shall not be increased. As cited in Wetland Standards: (c)(1) Liquids,
fill or other solids, or dissolved gases shall not be present in amounts that may cause adverse
impacts on existing wetland uses; and (3) Materials producing color or odor shall not be present
in amounts that may cause adverse impacts on existing wetland uses.
4. 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
Justification: A project that affects waters shall not be permitted unless the existing uses, and the
water quality to protect such uses, are protected. Activities must not cause water pollution that
precludes any best use on a short-term or long-term basis. As cited in Stream Standards: (12)
North Carolina Department of Environmental Quality Division of Water Resources
512 North Salisbury Street 1617 Mail Service Center Raleigh, North Carolina 27699-1617
919.707.9000

Timbermill Wind
DWR# 20220790 v2
Individual Certification #WQC006869
Page 7 of 12

Oils, deleterious substances, or colored or other wastes: only such amounts as shall not render
the waters injurious to public health, secondary recreation, or to aquatic life and wildlife, or
adversely affect the palatability of fish, aesthetic quality, or impair the waters for any designated
uses; and (21) turbidity in the receiving water shall not exceed 50 Nephelometric Turbidity Units
(NTU) in streams not designated as trout waters and 10 NTU in streams, lakes, or reservoirs
designated as trout waters; for lakes and reservoirs not designated as trout waters, the turbidity
shall not exceed 25 NTU; if turbidity exceeds these levels due to natural background conditions,
the existing turbidity level shall not be increased. As cited in Wetland Standards: (c)(1) Liquids,
fill or other solids, or dissolved gases shall not be present in amounts that may cause adverse
impacts on existing wetland uses; and (3) Materials producing color or odor shall not be present
in amounts that may cause adverse impacts on existing wetland uses.
5. 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)
Justification: A project that affects waters shall not be permitted unless the existing uses
(including aquatic life propagation and biological integrity), and the water quality to protect
such uses, are protected. Protections are necessary to ensure any remaining surface waters or
wetlands, and any surface waters or wetlands downstream, continue to support existing uses
during and after project completion. The Division must evaluate if the activity has avoided and
minimized impacts to waters, would cause or contribute to a violation of standards, or would
result in secondary or cumulative impacts.
6. 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
Justification: A project that affects waters shall not be permitted unless the existing uses, and the
water quality to protect such uses, are protected. Activities must not cause water pollution that
precludes any best use on a short-term or long-term basis. As cited in Stream Standards: (12)
Oils, deleterious substances, or colored or other wastes: only such amounts as shall not render
the waters injurious to public health, secondary recreation, or to aquatic life and wildlife, or
adversely affect the palatability of fish, aesthetic quality, or impair the waters for any designated
uses; and (21) turbidity in the receiving water shall not exceed 50 Nephelometric Turbidity Units
(NTU) in streams not designated as trout waters and 10 NTU in streams, lakes, or reservoirs
designated as trout waters; for lakes and reservoirs not designated as trout waters, the turbidity
shall not exceed 25 NTU; if turbidity exceeds these levels due to natural background conditions,
the existing turbidity level shall not be increased. As cited in Wetland Standards: (c)(1) Liquids,
fill or other solids, or dissolved gases shall not be present in amounts that may cause adverse
impacts on existing wetland uses; and (3) Materials producing color or odor shall not be present
in amounts that may cause adverse impacts on existing wetland uses.
North Carolina Department of Environmental Quality Division of Water Resources
512 North Salisbury Street 1617 Mail Service Center Raleigh, North Carolina 27699-1617
919.707.9000

Timbermill Wind
DWR# 20220790 v2
Individual Certification #WQC006869
Page 8 of 12

7. 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)
Justification: Surface water quality standards require that conditions of waters be suitable for all
best uses provided for in state rule, and that activities must not cause water pollution that
precludes any best use on a short-term or long-term basis. Ensuring that structures are installed
North Carolina Department of Environmental Quality Division of Water Resources
512 North Salisbury Street 1617 Mail Service Center Raleigh, North Carolina 27699-1617
919.707.9000

Timbermill Wind
DWR# 20220790 v2
Individual Certification #WQC006869
Page 9 of 12

properly in waters will ensure that surface water quality standards are met and conditions of
waters are suitable for all best uses.
8. 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
Justification: A project that affects waters shall not be permitted unless the existing uses, and the
water quality to protect such uses, are protected. Activities must not cause water pollution that
precludes any best use on a short-term or long-term basis. As cited in Stream Standards: (12)
Oils, deleterious substances, or colored or other wastes: only such amounts as shall not render
the waters injurious to public health, secondary recreation, or to aquatic life and wildlife, or
adversely affect the palatability of fish, aesthetic quality, or impair the waters for any designated
uses. As cited in Wetland Standards: (c)(1) Liquids, fill or other solids, or dissolved gases shall not
be present in amounts that may cause adverse impacts on existing wetland uses; and (3)
Materials producing color or odor shall not be present in amounts that may cause adverse
impacts on existing wetland uses.
9. 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
Justification: A project that affects waters shall not be permitted unless the existing uses, and the
water quality to protect such uses, are protected. Activities must not cause water pollution that
precludes any best use on a short-term or long-term basis. As cited in Stream Standards: (12)
Oils, deleterious substances, or colored or other wastes: only such amounts as shall not render
the waters injurious to public health, secondary recreation, or to aquatic life and wildlife, or
adversely affect the palatability of fish, aesthetic quality, or impair the waters for any designated
uses. As cited in Wetland Standards: (c)(1) Liquids, fill or other solids, or dissolved gases shall not
be present in amounts that may cause adverse impacts on existing wetland uses; and (3)
Materials producing color or odor shall not be present in amounts that may cause adverse
impacts on existing wetland uses.
10. 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)
Justification: A project that affects waters shall not be permitted unless the existing uses, and the
water quality to protect such uses, are protected. Protections are necessary to ensure any
remaining surface waters or wetlands, and any surface waters or wetlands downstream,
continue to support existing uses after project completion.
North Carolina Department of Environmental Quality Division of Water Resources
512 North Salisbury Street 1617 Mail Service Center Raleigh, North Carolina 27699-1617
919.707.9000

Timbermill Wind
DWR# 20220790 v2
Individual Certification #WQC006869
Page 10 of 12

11. 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)
Justification: Surface water quality standards require that conditions of waters be suitable for all
best uses provided for in state rule, and that activities must not cause water pollution that
precludes any best use on a short-term or long-term basis. Ensuring that structures are installed
properly in waters will ensure that surface water quality standards are met and conditions of
waters are suitable for all best uses.
12. 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)
Justification: Surface water quality standards require that conditions of waters be suitable for all
best uses provided for in state rule, and that activities must not cause water pollution that
precludes any best use on a short-term or long-term basis. The Division must evaluate if the
activity has avoided and minimized impacts to waters, would cause or contribute to a violation
of standards, or would result in secondary or cumulative impacts.
13. 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
Justification: A project that affects waters shall not be permitted unless the existing uses, and the
water quality to protect such uses, are protected. Activities must not cause water pollution that
precludes any best use on a short-term or long-term basis. As cited in Stream Standards: (12)
Oils, deleterious substances, or colored or other wastes: only such amounts as shall not render
the waters injurious to public health, secondary recreation, or to aquatic life and wildlife, or
adversely affect the palatability of fish, aesthetic quality, or impair the waters for any designated
uses. As cited in Wetland Standards: (c)(1) Liquids, fill or other solids, or dissolved gases shall not
be present in amounts that may cause adverse impacts on existing wetland uses; and (3)
North Carolina Department of Environmental Quality Division of Water Resources
512 North Salisbury Street 1617 Mail Service Center Raleigh, North Carolina 27699-1617
919.707.9000

Timbermill Wind
DWR# 20220790 v2
Individual Certification #WQC006869
Page 11 of 12

Materials producing color or odor shall not be present in amounts that may cause adverse
impacts on existing wetland uses.
14. 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
Justification: Wetland standards require maintenance or enhancement of existing uses of
wetlands such that hydrologic conditions necessary to support natural biological and physical
characteristics are protected; populations of wetland flora and fauna are maintained to protect
biological integrity of the wetland; and materials or substances are not present in amounts that
may cause adverse impact on existing wetland uses.
15. 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)
Justification: Person(s) owning or having control over oil or other substances upon notice of
discharge must immediately notify the Department, or any of its agents or employees, of the
nature, location, and time of the discharge and of the measures which are being taken or are
proposed to be taken to contain and remove the discharge. This action is required in order to
contain or divert the substances to prevent entry into the surface waters. Surface water quality
standards require that conditions of waters be suitable for all best uses provided for in state rule
(including, at minimum: aquatic life propagation, survival, and maintenance of biological
integrity; wildlife; secondary contact recreation; agriculture); and that activities must not cause
water pollution that precludes any best use on a short-term or long-term basis.
16. 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)
Justification: Surface water quality standards require that conditions of waters be suitable for all
best uses provided for in state rule, and that activities must not cause water pollution that
precludes any best use on a short-term or long-term basis. The Division must evaluate if the
activity has avoided and minimized impacts to waters, would cause or contribute to a violation
of standards, or would result in secondary or cumulative impacts.
17. The permittee shall require its contractors and/or agents to comply with the terms and
conditions of this certification 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.
North Carolina Department of Environmental Quality Division of Water Resources
512 North Salisbury Street 1617 Mail Service Center Raleigh, North Carolina 27699-1617
919.707.9000

Timbermill Wind
DWR# 20220790 v2
Individual Certification #WQC006869
Page 12 of 12

Citation: 15A NCAC 02H .0506(b); 15A NCAC 02H .0507(c)
Justification: Those actually performing the work should be aware of the requirements of this
401 Water Quality Certification to minimize water quality impacts.

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 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 24th day of May 2024

Stephanie Goss, Supervisor
401 & Buffer Permitting Branch
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Ditch ID
OHWM
Width
feet)
Permanent
Impact
acres)
Permanent
Impact
square
feet
Temporary
Impacts
acres)
Temporary
Impacts
square feet)
Total Project
Impacts
acres)
Total Project
Impacts
square feet)
Permanent
Fill Volume
cubic yards)*
LD002 0 0.00 200 0.03 1,284 0.03 1,484 15
LD011 0 0 0 0.02 855 0.02 855 0
LD013 0 0 0 0.00 77 0.00 77 0
LD015 0 0 0 0.00 49 0.00 49 0
LD016 0 0 0 0.00 127 0.00 127 0
LD018 0 0 0 0.00 110 0.00 110 0
LD021 0 0 0 0.00 124 0.00 124 0
LD022 0 0.00 21 0.01 286 0.01 307 2
LD023 0 0.00 26 0.01 285 0.01 311 2
LD024 0 0.00 28 0.01 289 0.01 317 2
LD025 0 0.00 33 0.00 217 0.00 250 2
LD026 0 0.00 53 0.00 191 0.00 244 4
LD027 0 0 0 0.01 246 0.01 246 0
LD028 0 0 0 0.00 182 0.00 182 0
LD029 0 0 0 0.02 822 0.02 822 0
LD030 0 0.00 89 0.07 2,933 0.07 3,022 7
LD031 0 0.01 594 0.01 384 0.02 978 44
LD032 0 0 0 0.01 559 0.01 559 0
LD036 0 0 0 0.00 14 0.00 14 0
LD044 0 0 0 0.00 121 0.00 121 0
LD045 0 0 0 0.00 121 0.00 121 0
LD046 0 0 0 0.01 352 0.01 352 0
LD047 0 0 0 0.01 265 0.01 265 0
LD053 0 0 0 0.01 233 0.01 233 0
LD054 0 0 0 0.02 789 0.02 789 0
LD055 0 0 0 0.00 202 0.00 202 0
LD056 0 0 0 0.00 203 0.00 203 0
LD057 0 0 0 0.00 200 0.00 200 0
LD058 0 0 0 0.00 132 0.00 132 0
LD060 0 0 0 0.00 140 0.00 140 0
LD061 0 0 0 0.01 353 0.01 353 0
LD062 0 0.00 40 0.00 78 0.00 118 3
LD065 0 0.00 89 0.01 631 0.01 720 7
LD066 0 0 0 0.01 284 0.01 284 0
LD067 0 0 0 0.00 60 0.00 60 0
LD068 0 0 0 0.01 284 0.01 284 0
LD069 0 0 0 0.00 60 0.00 60 0
LD070 0 0 0 0.00 60 0.00 60 0
LD071 0 0 0 0.00 60 0.00 60 0
LD072 0 0.00 11 0.01 290 0.01 301 1
LD073 0 0.00 134 0.06 2,817 0.06 2,951 10
LD074 0 0.00 34 0.00 30 0.00 64 3
LD076 0 0 0 0.00 173 0.00 173 0
LD077 0 0.00 92 0.03 1,329 0.03 1,421 7
LD078 0 0.00 57 0.01 241 0.01 298 4
LD079 0 0.00 176 0.02 974 0.02 1,150 13
LD080 0 0 0 0.00 183 0.00 183 0
LD081 0 0 0 0.00 155 0.00 155 0
LD083 0 0 0 0.01 577 0.01 577 0
LD084 0 0 0 0.03 1,441 0.03 1,441 0
Ditch ID
OHWM
Width
feet)
Permanent
Impact
acres)
Permanent
Impact
square
feet
Temporary
Impacts
acres)
Temporary
Impacts
square feet)
Total Project
Impacts
acres)
Total Project
Impacts
square feet)
Permanent
Fill Volume
cubic yards)*
LD085 0 0 0 0.00 202 0.00 202 0
LD086 0 0 0 0.04 1,540 0.04 1,540 0
LD087 0 0 0 0.01 268 0.01 268 0
LD088 0 0 0 0.00 78 0.00 78 0
LD089 0 0 0 0.00 181 0.00 181 0
LD090 0 0 0 0.04 1,722 0.04 1,722 0
LD091 0 0 0 0.01 441 0.01 441 0
LD092 0 0 0 0.01 376 0.01 376 0
LD093 0 0 0 0.00 180 0.00 180 0
LD094 0 0 0 0.02 808 0.02 808 0
LD095 0 0.02 1,071 0.02 826 0.04 1,897 79
LD096 0 0.00 89 0.01 560 0.01 649 7
LD097 0 0 0 0.01 354 0.01 354 0
LD103 0 0 0 0.04 1,794 0.04 1,794 0
LD104 0 0.00 199 0.04 1,919 0.04 2,118 15
LD106 0 0 0 0.00 169 0.00 169 0
LD107 0 0 0 0.00 197 0.00 197 0
LD111 0 0 0 0.00 183 0.00 183 0
LD114 0 0 0 0.00 126 0.00 126 0
LD121 0 0 0 0.00 181 0.00 181 0
LD122 0 0 0 0.01 263 0.01 263 0
LD124 0 0 0 0.03 1,473 0.03 1,473 0
LD126 0 0 0 0.01 492 0.01 492 0
LD128 0 0 0 0.01 625 0.01 625 0
LD131 0 0 0 0.00 180 0.00 180 0
LD132 0 0 0 0.01 495 0.01 495 0
LD133 0 0 0 0.00 186 0.00 186 0
LD135 0 0 0 0.00 67 0.00 67 0
LD136 0 0 0 0.00 60 0.00 60 0
LD137 0 0 0 0.00 77 0.00 77 0
LD138 0 0 0 0.00 61 0.00 61 0
LD140 0 0 0 0.00 58 0.00 58 0
LD141 0 0 0 0.00 55 0.00 55 0
LD143 0 0.00 124 0.02 1,063 0.02 1,187 9
LD156 0 0.00 130 0.00 0 0.00 130 10
LD157 0 0.00 87 0.00 0 0.00 87 6
LD158 0 0.00 82 0.00 0 0.00 82 6
LD159 0 0.00 73 0.00 0 0.00 73 5
LD160 0 0.00 71 0.00 0 0.00 71 5
LD161 0 0.00 66 0.00 0 0.00 66 5
LD162 0 0.00 68 0.00 0 0.00 68 5
LD163 0 0.00 72 0.00 0 0.00 72 5
LD164 0 0.00 74 0.00 0 0.00 74 5
LD167 0 0 0 0.00 150 0.00 150 0
LD168 0 0 0 0.00 131 0.00 131 0
LD169 0 0 0 0.00 102 0.00 102 0
LD170 0 0 0 0.00 105 0.00 105 0
LD172 0 0 0 0.00 110 0.00 110 0
LD173 0 0 0 0.01 375 0.01 375 0
LD174 0 0.00 61 0.02 807 0.02 868 5
LD175 0 0 0 0.00 143 0.00 143 0
Ditch ID
OHWM
Width
feet)
Permanent
Impact
acres)
Permanent
Impact
square
feet
Temporary
Impacts
acres)
Temporary
Impacts
square feet)
Total Project
Impacts
acres)
Total Project
Impacts
square feet)
Permanent
Fill Volume
cubic yards)*
LD176 0 0 0 0.00 79 0.00 79 0
LD177 0 0 0 0.00 73 0.00 73 0
LD179 0 0 0 0.00 15 0.00 15 0
LD181 0 0 0 0.00 93 0.00 93 0
LD182 0 0 0 0.00 22 0.00 22 0
LD184 0 0.00 20 0.00 158 0.00 178 1
LD185 0 0 0 0.00 34 0.00 34 0
LD186 0 0 0 0.00 54 0.00 54 0
LD188 0 0 0 0.00 156 0.00 156 0
LD189 0 0 0 0.00 157 0.00 157 0
LD190 0 0 0 0.01 296 0.01 296 0
LD191 0 0.00 19 0.00 137 0.00 156 1
LD192 0 0 0 0.00 137 0.00 137 0
LD193 0 0 0 0.01 631 0.01 631 0
LD198 0 0 0 0.00 165 0.00 165 0
LD199 0 0 0 0.00 163 0.00 163 0
LD200 0 0 0 0.00 171 0.00 171 0
LD203 0 0 0 0.01 279 0.01 279 0
LD204 0 0 0 0.01 286 0.01 286 0
LD206 0 0 0 0.00 86 0.00 86 0
LD207 0 0 0 0.00 104 0.00 104 0
LD211 0 0.02 784 0.04 1,836 0.06 2,620 58
LD216 0 0 0 0.00 167 0.00 167 0
PD001 0 0 0 0.01 428 0.01 428 0
PD002 0 0 0 0.00 204 0.00 204 0
PD003 0 0 0 0.00 17 0.00 17 0
PD007 0 0 0 0.01 445 0.01 445 0
PD008 0 0 0 0.01 224 0.01 224 0
PD009 0 0.00 211 0.00 15 0.00 226 16
PD010 0 0 0 0.01 351 0.01 351 0
PD011 0 0 0 0.07 2,845 0.07 2,845 0
PD013 0 0.00 126 0.01 522 0.01 648 9
PD014 0 0.00 113 0.00 7 0.00 120 8
PD015 0 0 0 0.01 441 0.01 441 0
PD016 0 0 0 0.00 120 0.00 120 0
PD017 0 0 0 0.01 236 0.01 236 0
PD020 0 0 0 0.01 346 0.01 346 0
PD023 0 0 0 0.01 397 0.01 397 0
PD024 0 0 0 0.00 196 0.00 196 0
PD029 0 0.00 133 0.01 296 0.01 429 10
PD031 0 0.00 60 0.00 118 0.00 178 4
PD032 0 0 0 0.00 183 0.00 183 0
PD033 0 0 0 0.00 183 0.00 183 0
PD034 0 0 0 0.00 27 0.00 27 0
PD035 0 0 0 0.00 6 0.00 6 0
PD038 0 0 0 0.04 1,917 0.04 1,917 0
PD039 0 0 0 0.01 359 0.01 359 0
PD042 0 0 0 0.01 373 0.01 373 0
PD044 0 0 0 0.00 123 0.00 123 0
PD045 0 0 0 0.00 180 0.00 180 0
PD048 0 0.00 122 0.00 0 0.00 122 9
Ditch ID
OHWM
Width
feet)
Permanent
Impact
acres)
Permanent
Impact
square
feet
Temporary
Impacts
acres)
Temporary
Impacts
square feet)
Total Project
Impacts
acres)
Total Project
Impacts
square feet)
Permanent
Fill Volume
cubic yards)*
PD049 0 0 0 0.00 53 0.00 53 0
PD050 0 0 0 0.00 180 0.00 180 0
PD051 0 0.00 173 0.00 178 0.00 351 13
PD054 0 0 0 0.01 249 0.01 249 0
PD056 0 0.00 145 0.02 722 0.02 867 11
PD057 0 0 0 0.00 180 0.00 180 0
PD058 0 0 0 0.00 181 0.00 181 0
PD059 0 0.01 466 0.01 478 0.02 944 35
PD060 0 0 0 0.01 223 0.01 223 0
PD061 0 0 0 0.48 20,873 0.48 20,873 0
PD062 0 0 0 0.00 70 0.00 70 0
PD063 0 0 0 0.00 38 0.00 38 0
PD064 0 0 0 0.08 3,400 0.08 3,400 0
PD065 0 0.00 16 0.01 626 0.01 642 1
PD066 0 0 0 0.00 68 0.00 68 0
PD068 0 0.00 96 0.01 547 0.01 643 7
PD069 0 0.00 18 0.00 9 0.00 27 1
PD070 0 0 0 0.01 355 0.01 355 0
PD071 0 0 0 0.07 3,101 0.07 3,101 0
PD072 0 0 0 0.04 1,705 0.04 1,705 0
PD073 0 0 0 0.10 4,291 0.10 4,291 0
PD074 0 0 0 0.00 96 0.00 96 0
PD075 0 0 0 0.13 5,604 0.13 5,604 0
PD076 0 0 0 0.00 78 0.00 78 0
PD077 0 0 0 0.00 108 0.00 108 0
PD078 0 0 0 0.01 410 0.01 410 0
PD079 0 0 0 0.01 608 0.01 608 0
PD080 0 0 0 0.15 6,567 0.15 6,567 0
PD081 0 0.00 53 0.12 5,329 0.12 5,382 4
PD082 0 0.00 147 0.02 676 0.02 823 11
PD083 0 0.00 121 0.01 510 0.01 631 9
PD087 0 0 0 0.00 138 0.00 138 0
RD003 0 0 0 0.02 743 0.02 743 0
RD004 0 0.01 391 0.06 2,686 0.07 3,077 29
RD006 0 0 0 0.01 400 0.01 400 0
RD007 0 0.01 609 0.04 1,905 0.05 2,514 45
RD010 0 0 0 0.01 330 0.01 330 0
RD0100 0 0.00 6 0.00 2 0.00 8 0
RD011 0 0 0 0.02 846 0.02 846 0
RD012 0 0.00 193 0.10 4,185 0.10 4,378 14
RD013 0 0.00 36 0.01 291 0.01 327 3
RD014 0 0.00 33 0.01 399 0.01 432 2
RD015 0 0 0 0.00 122 0.00 122 0
RD016 0 0.00 129 0.01 462 0.01 591 10
RD017 0 0.00 119 0.03 1,257 0.03 1,376 9
RD018 0 0 0 0.04 1,832 0.04 1,832 0
RD019 0 0.02 873 0.14 5,919 0.16 6,792 65
RD020 0 0.08 3,585 0.58 25,125 0.66 28,710 266
RD021 0 0.01 650 0.13 5,491 0.14 6,141 48
RD022 0 0.01 582 0.07 3,072 0.08 3,654 43
RD023 0 0.02 970 0.28 12,072 0.30 13,042 72
Ditch ID
OHWM
Width
feet)
Permanent
Impact
acres)
Permanent
Impact
square
feet
Temporary
Impacts
acres)
Temporary
Impacts
square feet)
Total Project
Impacts
acres)
Total Project
Impacts
square feet)
Permanent
Fill Volume
cubic yards)*
RD024 0 0 0 0.08 3,348 0.08 3,348 0
RD025 0 0.00 26 0.01 240 0.01 266 2
RD026 0 0.01 457 0.22 9,461 0.23 9,918 34
RD027 0 0.00 71 0.11 4,857 0.11 4,928 5
RD028 0 0.00 52 0.00 29 0.00 81 4
RD029 0 0.00 10 0.05 2,167 0.05 2,177 1
RD030 0 0.05 2,217 0.09 4,078 0.14 6,295 164
RD031 0 0.00 191 0.02 1,065 0.02 1,256 14
RD032 0 0.01 395 0.20 8,804 0.21 9,199 29
RD033 0 0 0 0.02 889 0.02 889 0
RD034 0 0 0 0.12 5,243 0.12 5,243 0
RD035 0 0 0 0.11 4,923 0.11 4,923 0
RD036 0 0.00 212 0.06 2,550 0.06 2,762 16
RD037 0 0.01 416 0.06 2,743 0.07 3,159 31
RD038 0 0.00 29 0.00 2 0.00 31 2
RD039 0 0.00 24 0.00 7 0.00 31 2
RD041 0 0 0 0.01 471 0.01 471 0
TGLD028 0 0 0 0.00 195 0.00 195 0
TGLD029 0 0 0 0.00 28 0.00 28 0
TGLD031 0 0 0 0.00 12 0.00 12 0
TGLD033 0 0 0 0.00 23 0.00 23 0
TGLD034 0 0 0 0.00 25 0.00 25 0
TGLD035 0 0 0 0.00 26 0.00 26 0
TGLD055 0 0 0 0.00 5 0.00 5 0
TGLD056 0 0 0 0.00 13 0.00 13 0
TGLD075 0 0.00 6 0.00 19 0.00 25 0
TGLD198 0 0 0 0.00 25 0.00 25 0
TGLD199 0 0 0 0.00 28 0.00 28 0
TGLD200 0 0 0 0.00 25 0.00 25 0
TGLD900 0 0 0 0.00 11 0.00 11 0
TGLD901 0 0 0 0.00 7 0.00 7 0
TGPD078 0 0 0 0.00 115 0.00 115 0
TGPD990 0 0 0 0.00 39 0.00 39 0
TGRD005 0 0 0 0.00 66 0.00 66 0
TGRD006 0 0 0 0.00 203 0.00 203 0
Total 0.44 19,049 5.16 233,445 5.46 252,494 1,411
OHWM = Ordinary High Water Mark; N/A = Not applicable
Permanent fill depths for ditches were estimated with a 2-foot depth across the area (square feet) of ditches permanently
impacted by the Project.
t Permanent fill volumes are estimates based on general assumptions and will be updated with the final, approved civil design
plans.
t Impacts rounded to less than 0.01 acre.
Impacts round to less than 1 cubic yard.
Impacts round to less than 1 square foot.
Note: Values have been rounded.