19970175 Ver 4_More Info Received_20211222

1
Anderson, Mitchell L
From:Anderson, Mitchell L
Sent:Wednesday, December 29, 2021 8:17 AM
To:Hiner, Richard L
Cc:Harmon, Richard G; Tillery, Julia; Brown, Chad
Subject:RE: [External] RE: REQUEST FOR ADDITIONAL INFORMATION – DWR 19970175v4, Duke Energy
Carolinas, Cliffside Unit Switchyard – Rutherford County
Hello Rick, 

This is acceptable.  

Thank you, 
Mitchell Anderson 

Mitchell Anderson
Environmental Specialist – Asheville Regional Office
Water Quality Regional Operations Section
NCDEQ – Division of Water Resources
2090 U.S. Hwy. 70
Swannanoa, N.C. 28778

828-296-4662 office
[e-mail]

Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties

From: Hiner, Richard L <[e-mail]>  
Sent: Wednesday, December 22, 2021 9:51 PM 
To: Anderson, Mitchell L <[e-mail]> 
Cc: Harmon, Richard G <[e-mail]>; Tillery, Julia <[e-mail]>; Brown, Chad 
<[e-mail]> 
Subject: RE: [External] RE: REQUEST FOR ADDITIONAL INFORMATION – DWR 19970175v4, Duke Energy Carolinas, 
Cliffside Unit Switchyard – Rutherford County 

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Mitchell, 

2
Your understanding of the sequence is correct and I agree that we could remove the in‐stream measures within the 
riprap channel if that is preferable (I believe they were added there as a back‐up measure in case sediment got into the 
system inadvertently during pipe installation).   

If we were to remove the in‐stream measures within the new channel and have only one in‐stream measure within the 
portion of the old channel that will be abandoned, will that be acceptable?  If so, I can have the modification made and a 
revised drawing sent to you early next week. 

Rick 

Richard L. Hiner, PE, CPESC
Direct: [phone]
Mobile: [phone]
[e-mail]  

From: Anderson, Mitchell L <[e-mail]>  
Sent: Wednesday, December 22, 2021 2:23 PM 
To: Hiner, Richard L <[e-mail]> 
Cc: Harmon, Richard G <[e-mail]>; Tillery, Julia <[e-mail]>; Brown, Chad 
<[e-mail]> 
Subject: RE: [External] RE: REQUEST FOR ADDITIONAL INFORMATION – DWR 19970175v4, Duke Energy Carolinas, 
Cliffside Unit Switchyard – Rutherford County 

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Hello Mr. Hiner, 

Thank you for this information. 

It was my understanding that the new channel and majority of the new culvert will be installed prior to any 
flow diversion. A pump around system will then divert stream flow into Manhole #1 of the new culvert during 
the installation of the new headwall and final connection to the stream. Once the headwall is complete, the 
stream will be directed into the new headwall and culvert and flowing through the new armored channel.  
This would leave the existing culvert and abandoned channel dewatered during the grouting of the abandoned 
culvert and filling of the old channel. 
Please let me know if I am misinterpreting the submitted plans. 

In stream sediment structures are permissible in the abandoned channel however, the division does not 
believe instream measures are necessary within the portions of new and continued stream channel. 
However, I would like to discuss this matter further over the phone or during a virtual meeting to ensure a 
complete understanding of the need for these measures.  

Would you be able to accommodate a meeting on one of the following dates? 
 December 29th or 30th 
 January 5th, 7th,  
 January 10th through 15th  

3

Thank you, 
Mitchell Anderson 

Mitchell Anderson
Environmental Specialist – Asheville Regional Office
Water Quality Regional Operations Section
NCDEQ – Division of Water Resources
2090 U.S. Hwy. 70
Swannanoa, N.C. 28778

828-296-4662 office
[e-mail]

4
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties

From: Hiner, Richard L <[e-mail]>  
Sent: Tuesday, December 21, 2021 4:47 PM 
To: Anderson, Mitchell L <[e-mail]> 
Cc: Harmon, Richard G <[e-mail]>; Tillery, Julia <[e-mail]>; Brown, Chad 
<[e-mail]> 
Subject: RE: [External] RE: REQUEST FOR ADDITIONAL INFORMATION – DWR 19970175v4, Duke Energy Carolinas, 
Cliffside Unit Switchyard – Rutherford County 

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Mitchell,  

Would it be acceptable to use check dams made of compost sock for sediment control during grouting of the existing 
pipe and backfilling of the old channel bed in the natural portion (see detail below)?   

Given the nature of the work to be performed and the fact that we will already be placing riprap in the channel bed, a 
stone check dam (see detail below) may be the only workable solution in the riprap area since a compost sock check 
dam will not seal properly along the bottom with a riprap lining and would, therefore, provide no real filtering of 
sediment.  Also, a stone check dam on top of a riprap lining does not materially change the surface treatment, so it did 
not seem to be a negative impact.   

It may not be feasible to avoid instream measures completely for this project since it will be very difficult to ensure that 
we do not have sediment discharging downstream without mitigating potential sediment in the channel during 
construction.  The check dams would be removed as soon as the existing pipe is closed off and flow is re‐routed to the 
new pipe. 

5
6

Rick 

Richard L. Hiner, PE, CPESC
Direct: [phone]
Mobile: [phone]
[e-mail]  

From: Anderson, Mitchell L <[e-mail]>  
Sent: Tuesday, December 21, 2021 4:24 PM 
To: Hiner, Richard L <[e-mail]> 
7
Cc: Harmon, Richard G <[e-mail]>; Tillery, Julia <[e-mail]>; Brown, Chad 
<[e-mail]> 
Subject: RE: [External] RE: REQUEST FOR ADDITIONAL INFORMATION – DWR 19970175v4, Duke Energy Carolinas, 
Cliffside Unit Switchyard – Rutherford County 

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Rick, 

The revised plan set dated November 03, 2021 also includes instream stone check dams within the new and existing 
channel. Instream erosion control measure are permissible under limited circumstances but should be avoided and 
minimized. The division believes these structures can be avoided with the implementation of upland sedimentation and 
erosion control measures as well as appropriate project phasing. Please provide justification for these structures or a 
statement of removal if their use is no longer desired.  

Please email or call my office at 828.296.4662 with any questions or concerns.  

Thank you, 
Mitchell Anderson 

8
Mitchell Anderson
Environmental Specialist – Asheville Regional Office
Water Quality Regional Operations Section
NCDEQ – Division of Water Resources
2090 U.S. Hwy. 70
Swannanoa, N.C. 28778

828-296-4662 office
[e-mail]

Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties

From: Hiner, Richard L <[e-mail]>  
Sent: Tuesday, December 21, 2021 3:36 PM 
To: Anderson, Mitchell L <[e-mail]> 
Cc: Harmon, Richard G <[e-mail]>; Tillery, Julia <[e-mail]>; Brown, Chad 
<[e-mail]> 
Subject: RE: [External] RE: REQUEST FOR ADDITIONAL INFORMATION – DWR 19970175v4, Duke Energy Carolinas, 
Cliffside Unit Switchyard – Rutherford County 

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Mitchell, 

Thank you for your prompt response.  Yes, the 67 LF is the total impact from the existing culvert outlet to the end of the 
riprap and we will update the table to reflect this amount and resubmit the table to you. 

Rick 

Richard L. Hiner, PE, CPESC
Direct: [phone]
Mobile: [phone]
[e-mail]  

From: Anderson, Mitchell L <[e-mail]>  
Sent: Tuesday, December 21, 2021 3:31 PM 
To: Hiner, Richard L <[e-mail]> 
Subject: RE: [External] RE: REQUEST FOR ADDITIONAL INFORMATION – DWR 19970175v4, Duke Energy Carolinas, 
Cliffside Unit Switchyard – Rutherford County 

CAUTION: External email. Please do not click on links/attachments unless you know the content is genuine and safe. 
Hello Rick, 

9
The PCN received on 08/30/2021 contained the following impact table. Please update this table to be congruent with 
your submitted plans.  

The impact table within the PCN submitted on August 30, 2021, as well as the original page F-2
within the plans dated June 16, 2021, indicate 42 LF of permanent impacts as
measured within the existing stream channel that will be impacted by riprap.

Permanent impacts the impacts to the existing channel as well as the loss of streambed below the original
culvert
outlet. In addition, please ensure that the location of the impacts are shown on the
construction drawings and clearly indicated in the revised impact table. [15A NCAC
02H .0502(c) and .0506(b)(3)]

It is noted that page F-2 of the plans dated November 2, 2021, indicate 67 LF of permanent impacts. Is this
measure from the new outfall to the end of rip rap alignment, or as described above and illustrated below?

10

Thank you, 
Mitchell Anderson 

Mitchell Anderson
Environmental Specialist – Asheville Regional Office
Water Quality Regional Operations Section
NCDEQ – Division of Water Resources
2090 U.S. Hwy. 70
Swannanoa, N.C. 28778

828-296-4662 office
[e-mail]

Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties

11

From: Hiner, Richard L <[e-mail]>  
Sent: Tuesday, December 21, 2021 3:05 PM 
To: Anderson, Mitchell L <[e-mail]> 
Cc: Tillery, Julia <[e-mail]>; Brown, Chad <[e-mail]>; Harmon, Richard G 
<[e-mail]> 
Subject: [External] RE: REQUEST FOR ADDITIONAL INFORMATION – DWR 19970175v4, Duke Energy Carolinas, Cliffside 
Unit Switchyard – Rutherford County 

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Report Spam. 

Mitchell, 

Dicky Harmon let me know that you had called him late yesterday with a question about a channel near the impact area 
and I wanted to contact you to see if I could assist in answering the question.  Please feel free to contact me at you 
earliest convenience. 

Rick 

Richard L. Hiner, PE, CPESC
Direct: [phone]
Mobile: [phone]
[e-mail]  

From: Harmon, Richard G <[e-mail]>  
Sent: Friday, November 12, 2021 1:02 PM 
To: Anderson, Mitchell L <[e-mail]>; Glenn, Elizabeth <Elizabeth.Glenn@duke‐energy.com> 
Cc: Boggs, Brandee C CIV USARMY CESAD (USA) <[e-mail]>; Hiner, Richard L 
<[e-mail]>; Tillery, Julia <[e-mail]> 
Subject: RE: REQUEST FOR ADDITIONAL INFORMATION – DWR 19970175v4, Duke Energy Carolinas, Cliffside Unit 
Switchyard – Rutherford County 

Mr. Mitchell, 

Please find attached our responses to your RAI questions of October 14, 2021 regarding the Duke Energy Cliffside Unit 5 
Switchyard. 

Please let us know if you have additional questions. 
Regards, 

Richard G. “Dicky” Harmon, PWS
Senior Associate Scientist
Wood Environment & Infrastructure Solutions, Inc.
4021 Stirrup Creek Drive, Suite 100, Durham, NC, 27703,USA
Direct: 919-381-1366
Mobile: [phone]
www.woodplc.com 
12
From: Anderson, Mitchell L [mailto:[e-mail]]  
Sent: Thursday, October 14, 2021 11:10 AM 
To: Glenn, Elizabeth <Elizabeth.Glenn@duke‐energy.com> 
Cc: Boggs, Brandee C CIV USARMY CESAD (USA) <[e-mail]>; Harmon, Richard G 
<[e-mail]> 
Subject: REQUEST FOR ADDITIONAL INFORMATION – DWR 19970175v4, Duke Energy Carolinas, Cliffside Unit Switchyard 
– Rutherford County 

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

Dear Ms. Glenn: 

On August 30, 2021, the Division of Water Resources (Division) received your application 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 information is received: 

1. Plans provided with the prefiling meeting request submitted on April 26, 2021 are different than plans 
submitted with the PCN received by the Division on August 30, 2021. The prefiling meeting request contains an 
11 page plan set titled “Cliffside Unit 5 Switchyard” dated March 26, 2021. Plans submitted with the PCN contain 
a 2 page plan set titled “Cliffside Unit 5 Switchyard” dated June 16, 2021. Significant details are included with 
the prefiling meeting request plan set that are not included in the PCN submitted plan set.  Are the plans 
provided with the prefiling meeting request to be incorporated in the review? If not, please submit a complete 
plan set to be included with your application. [15A NCAC 02H .0502(a)(9)] 

2. General Condition details within page C‐02 of the “Cliffside Unit 5” plan set dated March 26, 2021 states the 
total disturbed area for this project is approximately 28.64 acres. Whereas page C‐01 states the total disturbed 
area is 0.4 acres. Neither measurement was observed in plans submitted with the PCN received on August 30, 
2021. What is the proposed disturbed area of this project? [15A NCAC 02H .0502(a)(9)] 

3. Page C‐01 of the “Cliffside Unit 5” plan set dated March 26, 2021 states the existing impervious area is 8.41 
acres. Will there be any additional built upon areas or increases to impervious surfaces? [15A NCAC 02H 
.0506(b)(3)] 

4. All work in or adjacent to streams shall be conducted so that the flowing stream does not come in contact with 
the disturbed area.  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 .0506(b)(3)] 

5. The impact table within the PCN submitted on August 30, 2021 as well as page F‐2 within the plans dated June 
16, 2021 indicate 42 LF of permanent impacts as measured within the existing stream channel that will be 
impacted by riprap. Permanent impacts must also include the loss of streambed below the original culvert 
outlet. In addition, please ensure that the location of the impacts are shown on the construction drawings and 
clearly indicated in the revised impact table. [15A NCAC 02H .0502(c) and .0506(b)(3)] 

6. A signature is missing on page 10 of the submitted application. Please provide a signature by the applicant for 
the federal permit or license or an agent authorized by the applicant. If an agent is signing for the applicant, an 
agent authorization letter must be provided. In signing the application, the applicant certifies that all 
13
information contained therein or in support thereof is true and correct to the best of their knowledge. [15A 
NCAC 02H .0502(A)(11)]  

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.deq.nc.gov/Forms/Supplemental‐Information‐Form (note the DWR# requested on the link is 
referenced above).   

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 Section 401 of the Clean Water Act 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 Mitchell Anderson at 828.296.4662 or [e-mail] if you have any questions or 
concerns. 

Thank you, 

Mitchell Anderson
Environmental Specialist – Asheville Regional Office
Water Quality Regional Operations Section
NCDEQ – Division of Water Resources
2090 U.S. Hwy. 70
Swannanoa, N.C. 28778

828-296-4662 office
[e-mail]

Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties

Based on the current guidance to minimize the spread of COVID-19, the Department of Environmental Quality has
adjusted operations to protect the health and safety of the staff and public. Many employees are working remotely or are
on staggered shifts. To accommodate these staffing changes, all DEQ office locations are limiting public access to
appointments only. Please check with the appropriate staff before visiting our offices, as we may be able to handle your
requests by phone or email. We appreciate your patience as we continue to serve the public during this challenging time.

14
DWR # 1997‐0175 V4 
Rutherford County 

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