20170426 Ver 1_More Info Letter_20170601

ROY COOPER
Governor
r1o.
MICHAEL S. REGAN
Secretary
S. JAY ZIMMERMAN
Director
Water Resources
Environmental Quality
June 1, 2017
DWR # 20170426
Buncombe County
Duke Energy
Attn: Steve Cahoon
411 Fayetteville St
Raleigh NC 27601
Subject: REQUEST FOR ADDITIONAL INFORMATION
Asheville Combined Cycle Project Laydown Area
Dear Mr. Cahoon:
On April 7, 2017, the Division of Water Resources — Water Quality Programs (Division) received your
application dated March 30, 2017, requesting an Individual Water Quality Certification from the Division for
your project. The Division has determined that your application is incomplete and cannot be processed.
The application is on -hold until all of the following information is received:
Section 6.2.1 of the application document states that "Laydown area 3, with impacts, will provide
approximately 5.9 acres of usable area". It also states that "The proposed impacts... within Laydown
Area 3 are necessary for establishing the basin and piping, while site grading is required to provide
a suitably sized pad to accommodate laydown material and equipment. Please provide
plans/sketches that visually show the final layout of the site, including any sediment and erosion
control measures and/or post construction stormwater measures that will be required by the local
government. [15A NCAC 02H .0502(b)]
2. Please provide a detailed engineering plan, profile view, and cross-section of all proposed culverts.
These drawings must include details regarding stream alignment in relation to pipe alignment, pipe
slope, pipe burial, and any dissipater pads that may be required by the sediment and erosion
control authority. [15A NCAC 02H .0502(b)]
3. All work must be done "in the dry" to protect downstream water quality, therefore dewatering
methods will be necessary to temporarily dewater the stream channel and pond during pipe
installation. Please provide a construction sequence that details the method of dewatering to be
utilized at the site and the sequence of construction events to be followed to ensure compliance
with this condition. In addition, please ensure that the location of the temporary impacts are
shown on the construction drawings and clearly indicated in the revised impact table. [15A NCAC
02H .0502(b)(3)].
State of North Carolina I Environmental Quality
450 W. Hanes Mill Road, Suite 300, Winston-Salem, North Carolina 27105
Phone: [phone] FAX: [phone]

Duke Energy
DWR# 20170426
Request for Additional Information
Page 2 of 2
4. The classification of Stream 22 as "intermittent" must be verified by the Division. Please contact
Zan Price, Assistant Regional Supervisor — Asheville Regional Office, 828 296 4662 or
[e-mail] to schedule a site visit.
5. If the U.S. Army Corps of Engineers requests a response to any comments received as a result of
the Public Notice, please provide the Division with a copy of your response to the USACE. [15A
NCAC 02H .0502(c)]
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. If all of the requested information is not received in writing
within 30 calendar days of receipt of this letter, the Division will be unable to approve the application and it
will be returned. The return of this project will necessitate reapplication to the Division for approval,
including a complete application package and the appropriate fee.
Please respond within 30 calendar days of receipt of this letter by submitting all of the above requested
information through this link: https://edocs.deg.nc.gov/Forms/Supplemental-Information-Form. Please
note that the DWR# that is requested on the link is referenced above.
Please be aware that you have no authorization under the Water Quality Certification Rules for this activity
and any work done within waters of the state may be a violation of North Carolina General Statutes and
Administrative Code.
Please contact me at 336-776-9693 or [e-mail] if you have any questions or concerns.
Sincerely,
Sue Homewood
Winston-Salem Regional Office
cc: Dicky Harmon, Amec Foster Wheeler Environment & Infrastructure Inc (via email)
David Brown, USACE Asheville Regulatory Field Office (via email)
DWR ARO 401 files
DWR 401 & Buffer Permitting Unit