20001195 Ver 17_More Info Requested_20200306

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Director
NORTH CAROLINA
Environmental Quality
March 6, 2020
DWR # 20001195 Ver 17
Mecklenburg County
City of Charlotte —Aviation Department
Attn: Mr. Brent Cagle
5601 Wilkinson Blvd
Charlotte NC 28208
Subject: REQUEST FOR ADDITIONAL INFORMATION
CLT Airport Expansion
Dear Mr. Cagle:
On February 7, 2020, the Division of Water Resources — Water Quality Programs (Division) received your
application dated January 29, 2020, requesting a 401 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:
1. 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)]
2. On Appendix A- Figure 8, please explain why the road cannot be aligned to further minimize the
impacts to the stream by using the existing culvert location.
The application notes that Duke Energy has requested an exclusive access road. Please provide
further justification that explains why exclusive access is necessary.
4. On Appendix A — Figure 11 it is noted that impacts are proposed to Stream 10 for removing
connectivity (jurisdiction) to downstream impacted areas. The Division believes the same would
be true for Wetland W6. Please update the plans to include impacts to Wetland W6 in Phase 1
rather than Phase 2.
5. Please provide information regarding alternative alignment of the relocated waterline. It
appears that there may be alternative alignments which would minimize impacts. Please also
explain the need for the significant width of the corridor as it appears that this width increases
the impacts beyond what is typically require for utility installation.
D E Q�� North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1 1617 Mail Service Center I Raleigh, North Carolina 27699-1617
m )ry rN cmo:. i
o.�ro�em or E�.w�����a�:r� /� 919.707.9000

City of Charlotte —Aviation Department
DWR Project #20001195 Ver 17
Request for Additional Information
Page 2 of 3
6. On Appendix A — Figure 12, Impact area TS3-1: Please provide site specific drawings indicating
how these features are to be impacted during construction activities and how they are to be
restored upon construction completion. The typical dewatering specifications provided with the
application for stream crossings are not sufficient for parallel impacts. Please also describe how
downstream water quality will be protected during construction activities when a stream is
parallel within the project corridor. Please provide site -specific restoration details for this
location. The Division is specifically concerned with any proposal to restore the channel to pre -
construction location when the channel is parallel with the utility line and within a location
where long term maintenance activities are likely to have permanent impacts to the channel.
[15A NCAC 02H .0506(b)(2)]
7. On Appendix A— Figure 14, please explain why the waterline alignment cannot be within, or
closer to, the road shoulder as shown further down Old Dowd Rd.
8. While burial of culverts is typically required by the regulatory agencies, given the relatively steep
slope (2.5%) of the some of the proposed culverts, we are concerned that the streams at these
locations would be subject to headcutting above the proposed culverts due to the proposed 1'
invert burial. Please re-evaluated each location and provide revised plans that do not include
culvert burial (beyond that necessary for low flow passage), or otherwise address the concern
for headcutting, for any culverts proposed to be installed at steep grades.
9. Please provide additional information regarding the necessity of providing stormwater
detention with an "online" detention area. Please include an overall plan of the airport's
current stormwater control measures, a conceptual plan for all future proposed stormwater
treatment control measures, and a detailed analysis that clearly explains why stormwater
detention cannot be practically achieved in uplands. Please include analyses which include the
use of multiple smaller devices, underground devices, or other alternative stormwater
measures. Please evaluate each project area separately.
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 respond in writing within 30
calendar days of receipt of this letter by sending one (1) copy of all of the above requested information
to the 401 & Buffer Permitting Branch, 1617 Mail Service Center, Raleigh, NC 27699-1617 OR by
submitting all of the above requested information through this
link: https://edocs.deg.nc.gov/Forms/Supplemental-Information-Form (note the DWR# requested on
the link is referenced above).

City of Charlotte —Aviation Department
DWR Project #20001195 Ver 17
Request for Additional Information
Page 3 of 3
If all of the requested information is not received within 30 calendar days of receipt of this letter, the
Division will be unable to approve the application and it will be denied as incomplete. The denial of this
project will necessitate reapplication to the Division for approval, including a complete application
package and the appropriate fee.
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 Sue Homewood at 336-776-9693 or [e-mail] if you have any
questions or concerns.
Sincerely,
DocuSigned by:
P e �l��o�
949D91 BA53EF4E0...
Paul Wojoski, Supervisor
401 & Buffer Permitting Branch
cc: Kelly Thames, HDR (via email)
David Shaeffer, USACE Charlotte Regulatory Field Office (via email)
Olivia Munzer, NCWRC (via email)
Byron Hamstead, USFS (via email)
DWR MRO 401 files
DWR 401 & Buffer Permitting Unit