20211204 Ver 1_Correspondence_20220310

Strickland, Bev
From: Cohn, Colleen M
Sent: Thursday, March 10, 2022 2:22 PM
To: Joey Lawler
Cc: Joshua J Przywara (Services - 6); AARON SCHWARTZ; Liane Rene Morgan;
[e-mail]; RHONDA LEMON (Gas Distribution - 5);
[e-mail]; [e-mail]; Jason Reeves;
Walter Cole; Carl Rogers; [e-mail]
Subject: RE: [External] DENC Walnut Creek Exposure / Raleigh / Wake County /
SAW-2020-02164 / NWP 12 Verification
We have concluded that you can proceed with the activity as described in this instance. I'll add this email chain to the
file in Laserfiche.
I would like to see the turbidity curtain in action. Please let me know when the work is expected to proceed, and I will
see if I am available to do a site visit that day.
Thanks,
Colleen Cohn
Environmental Specialist II
North Carolina Department of Environmental Quality Division of Water Resources Raleigh Regional Office
3800 Barrett Drive
Raleigh, NC 27609
Office: 919-791-4258
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.
Original Message
From: Joey Lawler <[e-mail]>
Sent: Friday, March 4, 2022 10:49 AM
To: Cohn, Colleen M <[e-mail]>
Cc: Joshua J Przywara (Services - 6) <[e-mail]>; AARON SCHWARTZ
<[e-mail]>; Liane Rene Morgan <[e-mail]>;
[e-mail]; RHONDA LEMON (Gas Distribution - 5)
<[e-mail]>; [e-mail]; [e-mail]; Jason
Reeves <[e-mail]>; Walter Cole <[e-mail]>; Carl Rogers <[e-mail]>;
[e-mail]
Subject: RE: [External] DENC Walnut Creek Exposure / Raleigh / Wake County / SAW-2020-02164 / NWP 12 Verification
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to Report Spam.<mailto:[e-mail]>
Good morning Ms. Cohn - were you able to determine if DENC could complete the work as described without written
pre -construction approval, or is there any additional information you need?
Joey Lawler, PWS
1

Senior Consultant
S&ME
2016 Ayrsley Town Blvd., Suite 2-A
Charlotte, NC 28273
0: 704.523.4726
M: 704.604.6474
https://urldefense.com/v3/_http://www.smei nc.com_;! ! HYmSToo! NdVv8uU D911Ct3raoYmHC1-
PCIwhQ7UnafeUimKEwWT_1NIHwOSPDmx3ientRCkOXgfR$
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Original Message
From: Joey Lawler
Sent: Thursday, February 24, 2022 8:26 AM
To: Cohn, Colleen M <[e-mail]>
Cc: Joshua J Przywara (Services - 6) <[e-mail]>; AARON SCHWARTZ
<[e-mail]>; Liane Rene Morgan <[e-mail]>;
[e-mail]; RHONDA LEMON (Gas Distribution - 5)
<[e-mail]>; [e-mail]; [e-mail]; Jason
Reeves <[e-mail]>; Walter Cole <[e-mail]>; Carl Rogers <[e-mail]>;
[e-mail]
Subject: RE: [External] DENC Walnut Creek Exposure / Raleigh / Wake County / SAW-2020-02164 / NWP 12 Verification
Good morning Colleen -
The answers to your questions from your email of last week are provided below. I have also attached a copy of the
aquatic species survey that was performed, and a draft of the ESC drawings indicating how they would be revised.
1) Can all work be performed from the bank/high ground (no equipment in water)?
All heavy equipment used to remove the sheet piles will be staged approximately 10-15 ft away from the water, and
no equipment will be in the stream for any reason.
2) How long will the work take?
We anticipate that the sheet pile removal and the streambank restoration activities will take approximately 2-4 days
to complete.
3) Do you have plans that you could share?
A copy of the drawings is attached. We have marked -up the drawing to indicate the purposed locations of the
turbidity curtains on the approved E&SC Plans.
4) Could some sort of deflection barrier be installed just upstream of the work where most of the flow could be diverted
away from the bank?
It's possible to install a steal plate upstream of the sheet piles to reduce the stream current velocity; however,
there's a chance that it would increase the velocity on the opposite side of the stream where a large sandbar is located.
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Even for a short amount of time this may cause additional erosion/impacts. The location is indicated on the drawing.
Please let us know if we should proceed with use of the plate.
5) Could this be done under a NWP13 as bank stabilization?
It appears that the project could be authorized by either GC 4244 (NWP-12) or GC 4245 (NWP-13). However,
because the Corps has already authorized the work under NWP-12, GC-4244 is probably the appropriate corresponding
certification to use. And in either event, both certifications have the same general condition regarding in -stream work.
6) Are there species of concern in that location of the river?
Aquatic surveys for federally protected species were performed at the project area on February 8 and May 26, 2021
by Three Oaks Engineering. The survey area included the current, larger limits -of -disturbance (LOD). The surveys
followed established protocols and no federally protected species or species of concern were identified. A copy of the
survey report is attached. We have coordinated with the USACE regarding the change in work, and they have approved
the change under NWP12.
7) Would WRC or FWS have issues with a slightly high turbidity for a short term?
Dominion has conducted similar work that was approved by the agencies so long as the previously described
measures and turbidity monitoring protocol were implemented.
8) Will you (Joey) or someone else be on site the entire time they are working in stream?
Dominion will arrange to have qualified Natural Resources or Environmental Inspectors on -site full-time for the
duration of the instream portion of the work.
Thanks again, and please let me know if you have any additonal informtion -j
Joey Lawler, PWS
Senior Consultant
S&ME
2016 Ayrsley Town Blvd., Suite 2-A
Charlotte, NC 28273
0: 704.523.4726
M: 704.604.6474
https://urldefense.com/v3/_http://www.smei nc.com_;! ! HYmSToo! NdVv8uU D91ICt3raoYm HC1-
PCIwhQ7UnafeUimKEwWT_1NIHwOSPDmx3ientRCkOXgfR$
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Original Message
From: Cohn, Colleen M <[e-mail]>
Sent: Thursday, February 17, 2022 1:43 PM
To: Joey Lawler <[e-mail]>
3

Cc: Joshua J Przywara (Services - 6) <[e-mail]>; AARON SCHWARTZ
<[e-mail]>; Liane Rene Morgan <[e-mail]>;
[e-mail]; RHONDA LEMON (Gas Distribution - 5)
<[e-mail]>; [e-mail]; [e-mail]; Jason
Reeves <[e-mail]>; Walter Cole <[e-mail]>; Carl Rogers <[e-mail]>;
[e-mail]
Subject: RE: [External] DENC Walnut Creek Exposure / Raleigh / Wake County / SAW-2020-02164 / NWP 12 Verification
This message originated outside of S&ME. Please report this as phishing if it implies it is from an S&ME employee.
Hi Joey,
A few questions:
1) Can all work be performed from the bank/high ground (no equipment in water)?
2) How long will the work take?
3) Do you have plans that you could share?
4) Could some sort of deflection barrier be installed just upstream of the work where most of the flow could be diverted
away from the bank?
5) Could this be done under a NWP13 as bank stabilization?
6) Are there species of concern in that location of the river?
7) Would WRC or FWS have issues with a slightly high turbidity for a short term?
8) Will you (Joey) or someone else be on site the entire time they are working in stream?
Thanks,
Colleen Cohn
Environmental Specialist II
North Carolina Department of Environmental Quality Division of Water Resources Raleigh Regional Office
3800 Barrett Drive
Raleigh, NC 27609
Office: 919-791-4258
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.
Original Message
From: Joey Lawler <[e-mail]>
Sent: Thursday, February 17, 2022 12:00 PM
To: Cohn, Colleen M <[e-mail]>
Cc: Joshua J Przywara (Services - 6) <[e-mail]>; AARON SCHWARTZ
<[e-mail]>; Liane Rene Morgan <[e-mail]>;
[e-mail]; RHONDA LEMON (Gas Distribution - 5)
<[e-mail]>; [e-mail]; [e-mail]; Jason
Reeves <[e-mail]>; Walter Cole <[e-mail]>; Carl Rogers <[e-mail]>;
[e-mail]
Subject: [External] DENC Walnut Creek Exposure / Raleigh / Wake County / SAW-2020-02164 / NWP 12 Verification
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to Report Spam.<mailto:[e-mail]>
4

Good morning Colleen.
As a follow-up to the voicemail I left you earlier, please refer to the Dominion Energy North Carolina (DENC) project
referenced above. I've been copying you on email correspondence with the Corps recently, but the project was originally
handled on DWR's end by Stephanie Goss, so I'll give you a little background information.
One of DENC's high-pressure gas lines had become exposed due to a severely eroding segment of Walnut Creek, and
was basically hanging in the air above the creek, creating anpublic safety issue. After coordination with the Corps and
DWR, DENC temporarily installed some sheet pilings along the eroded bank and backfilled the area behind them to
protect the exposed pipe in the short term. They then installed a new segment of pipe via HDD (bore) so they could
abandon the exposed segment. The work required an Army Corps Permit, (NWP-12), but it was not subject to
preconstruction written approval from DWR under GC 4244.
Now that installation of the new pipe is complete, DENC is ready to remove the temporary sheet piling and restore the
segment of bank that was eroded. The original plans called for installation of a coffer dam around the work area in the
creek, and the sheet -pile removal and bank restabilization work would take place in the dewatered area behind the
coffer dam.
However, a large scour hole has developed in front of the sheet piling, making installation of a cofferdam impracticable
there. Temporarily damning the entire creek would not be safe either, since there is too much flow to pump around the
work area.
DENC has determined that the safest and most practicable way to proceed in to install an impermeable turbidity curtain
around the work area in lieu of the coffer dam. While the area behind the curtain could not be completely dewatered,
efforts to make it as dry as possible would be made. The curtain would also prevent direct flow from coming in contact
with the work area, and inhibit downstream turbidity.
DENC would also conduct turbidity monitoring downstream of the work area, and stop work if turbidity in the creek
exceeds 50 NTUs above background.
My question is whether this method will still comply with general condition no. 8 of GC 4244, or worst case, if we would
now need to get written approval beforehand. My general reading is that this approach should still meet the intent of
that condition, but I would like some confirmation in that regard.
DENC would welcome a site visit from DWR to explain the approach and review the area if needed -just let us know.
Thanks for your help, and please don't hesitate to reach out to me if you need additional information -
Joey Lawler, S&ME
Sent from my iPhone
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