20200907 Ver 1_More Info Requested_20200810

Strickland, Bev
From: Homewood, Sue
Sent: Monday, August 10, 2020 5:14 PM
To: Jon Swaim
Cc: Brandee Boggs (Bra [e-mail]1); Leslie, Andrea J
Subject: RE: [External] RE: Wilkesboro WTP Upgrades
Hi Jon,
To follow up with Andrea's comments, DWR will also need to see a very detailed coffer dam design specific to this
location/river. Because we've seen problems with establishing and maintaining coffer dams in large river systems for
long period of time, we need very specific details of what materials are proposed to be used, what calculations can be
provided to document the feasibility of the material to withstand high flow/high velocity events, is there a expected
storm size that would be expected to "overtop" the cofferdam and if so what is the process for securing the area, exactly
where will the footprint be (how much of the flow will be diverted, an evaluation of any potential erosive velocities
expected on the opposite river bank (in an incised river/stream we've seen erosion problems on the opposite bank).
Thanks
Sue Homewood
Division of Water Resources, Winston Salem Regional Office
Department of Environmental Quality
336 776 9693 office
336 813 1863 mobile
[e-mail]
450 W. Hanes Mill Rd, Suite 300
Winston Salem NC 27105
From: Leslie, Andrea J <[e-mail]>
Sent: Monday, August 10, 2020 11:59 AM
To: Jon Swaim<[e-mail]>
Cc: Homewood, Sue <[e-mail]>; Brandee Boggs(Bra [e-mail]1)
<Brandee.C. [e-mail]>
Subject: RE: [External] RE: Wilkesboro WTP Upgrades
Jon,
A few follow-up questions:
• Can you provide a map of the coffer dam impacts on top of the aerials? We need to know how far out
into the channel it will be.

The intake screen openings are not specified — can you provide this information? NCWRC guidelines
call for openings no larger than 0.4 inch (1 cm).
There are state listed/rare mussels and crayfish in this part of the Yadkin River. Is the Town willing to
survey for and relocate for these animals within the impact footprint (including 100 ft upstream and
downstream of the direct impact area)?
Thank you,
Andrea
Andrea Leslie
Mountain Habitat Conservation Coordinator
NC Wildlife Resources Commission
645 Fish Hatchery Rd., Building B
Marion, NC 28752
828-803-6054 (office)
828-400-4223 (cell)
www.ncwildlife.org
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From: Jon Swaim<[e-mail]>
Sent: Thursday, August 06, 2020 5:28 PM
To: Leslie, Andrea J <[e-mail]>
Subject: RE: [External] RE: Wilkesboro WTP Upgrades
• External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
r [e-mail]
Here you go, thanks
Jon Swaim
Project Manager
McGill Associates, P.A.
1013 State Farm Road, Boone, NC 28607
T 828.386.1920
C 828.434.0951
ion.swaim(cDmcaillassociates.com
mcgillassociates.com

From: Leslie, Andrea J <[e-mail]>
Sent: Thursday, August 06, 2020 5:25 PM
To: Jon Swaim<[e-mail]>
Subject: RE: [External] RE: Wilkesboro WTP Upgrades
Jon -
Can you send me the construction drawings as well?
Andrea
Andrea Leslie
Mountain Habitat Conservation Coordinator
NC Wildlife Resources Commission
645 Fish Hatchery Rd., Building B
Marion, NC 28752
828-803-6054 (office)
828-400-4223 (cell)
www.ncwildlife.org
Get NC Wildlife Update delivered to your inbox from the N.C. Wildlife Resources Commission.
Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties.
From: Homewood, Sue <[e-mail]>
Sent: Tuesday, August 04, 2020 12:43 PM
To: Leslie, Andrea J <andrea.leslie@ncwildlife. org>
Subject: FW: [External] RE: Wilkesboro WTP Upgrades
Should have copied you on this, I don't think I've seen your comments yet, so hopefully this will help in your review. I'll
forward when I receive his response
Sue Homewood
Division of Water Resources, Winston Salem Regional Office
Department of Environmental Quality
336 776 9693 office
336 813 1863 mobile
Sue. [e-mail]
450 W. Hanes Mill Rd, Suite 300
Winston Salem NC 27105
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From: Homewood, Sue
Sent: Tuesday, August 4, 2020 12:16 PM
To: Jon Swaim<[e-mail]>
Subject: RE: [External] RE: Wilkesboro WTP Upgrades
Hey Jon,
I just reviewed the application. You make reference to the coffer dam/pump around details but I didn't see a plan sheet
with those details. In fact, there were no construction drawings. Can you send me those please. Thanks.
Sue Homewood
Division of Water Resources, Winston Salem Regional Office
Department of Environmental Quality
336 776 9693 office
336 813 1863 mobile
Sue. [e-mail]
450 W. Hanes Mill Rd, Suite 300
Winston Salem NC 27105
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From: Jon Swaim<[e-mail]>
Sent: Thursday, July 2, 2020 10:00 AM
To: Boggs, Brandee C CIV USARMY CESAD (USA)<[e-mail]>
Cc: Homewood, Sue <[e-mail]>
Subject: [External] RE: Wilkesboro WTP Upgrades
External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
[e-mail]
Thanks Brandee, We would be filling the riverbed outside of the existing intake footprint so I don't think a non -
notification NW3 would work. Possibly a non -notification NW12? It's looking like there will be about 40LF of permanent
river impacts and an additional 60LF of temporary impacts for flow diversion during construction. I'm planning on
submitting a PCN regardless to make sure we are covered.
The coordinates are 36.144527,-81.178778
https://goo.gl/maps/VF5xXmbAVFLD5iR99 [goo.gll
Jon Swaim

Project Manager
McGill Associates, P.A.
1013 State Farm Road, Boone, NC 28607
T 828.386.1920
C 828.434.0951
ion.swaima-mcgillassociates.com
mcgillassociates.com [mcgillassociates.coml
From: Boggs, Brandee C CIV USARMY CESAD (USA)<[e-mail]>
Sent: Wednesday, July 01, 2020 8:11 PM
To: Jon Swaim<[e-mail]>
Cc: Homewood, Sue <[e-mail]>
Subject: RE: Wilkesboro WTP Upgrades
Hi Jon, you are correct, that is not Section 10, 1 believe Section 10 doesn't start until it becomes the Pee Dee.
As far as NWP#7 or #12, I'll need to look at that further, but my inclination is either will work and NWP #12 may allow it
to fall below the notification threshold unless there is something I am missing from first glance. Is the NWP#12 non -
notification what you were shooting for? I believe we could also consider a #3 (if this is in the same site) and this too
might fall below notification thresholds (751-f).
What are the coordinates for the project?
I'll check and see if there is any reason we would need to keep it at a NWP#7
Cheers, Brandee
From: Jon Swaim<[e-mail]>
Sent: Wednesday, July 1, 2020 3:19 PM
To: Boggs, Brandee C CIV USARMY CESAD (USA)<[e-mail]>
Cc: Homewood, Sue <[e-mail]>
Subject: [Non-DoD Source] Wilkesboro WTP Upgrades
Hi Brandee, We are in the process of designing upgrades to the Town of Wilkesboro water treatment plant. Part of the
upgrades includes abandoning the existing raw water intake on the Yadkin River and replacing it with a new intake
screen which will be anchored to the river bed.
The installation will result in temporary river bank and bed impacts to trench in the intake and 24" pipe, and permanent
impact to the river bed for the screens. See attached plan sheet for reference.
Would we permit this under a NW7 or NW12? Also, I don't think this section of the Yadkin is a Section 10 water, but
wanted to confirm.
Thanks!
Jon Swaim
Project Manager
McGill Associates, P.A.
1013 State Farm Road, Boone, NC 28607

T 828.386.1920
C 828.434.0951
jon.swaim(cDmcgillassociates.com
mcgillassociates.com