20180372 Ver 1_More Info Requested_20180409

Strickland, Bev
From: Homewood, Sue
Sent: Monday, April 09, 2018 1:14 PM
To: 'Will Larsen'
Cc: Dailey, Samantha J CIV USARMY CESAW (US)
Subject: RE: [External] EDGECOMBE: Kingsboro IP
Thank you for sending the plan sheets with the topo lines. Since I was able to zoom in using the electronic copies you
sent I've looked at the plans more closely, and gone back over my notes from Friday and continue to have the following
questions/concerns:
• Please provide the type of wetland as requested in Table C2. of the PCN form.
Since I was able to zoom in on the electronic copies of the plans you sent me, I don't need specific impact
sheets, however it's still very hard for me to find and follow all the buffer and wetland lines and identify the
exact areas you are calling out as buffer and wetland impact areas on these plan sheets. The circles used to
identify buffer impact areas do not encompass all of the impacts and with the light shading I'm unable to see
what exactly you are considering impact areas. Can you provide these sheets in color or in some other means
to clearly distinguish buffers and wetlands please, or if it's easier you can provide separate impact maps at a
larger scale and in color. As we discussed on the phone, please also ensure you somehow identify where buffer
and wetland impacts overlap.
I remain very concerned about the area near station 10+00 and have similar concerns about the area near
station 14+00. It appears that the work area is within the Top of Bank and very close to the stream itself and the
sewer itself is within 10 feet of the sewerline. The Minimum Design Criteria for gravity sewers
states: B. Horizontal Location 1. Sewers located along streams, lakes or impoundments, shall
be located at least 10 feet outside of the stream bank (unless subject to B.2 of this section) or
sufficiently removed therefrom to provide for future possible stream widening and to prevent
siltation of the stream during construction. The project would need a variance from the MDC, as well as
an exemption from the standard 401 Certification language. I recognize that the slope adjacent to this area is
steep and of concern for constructability, however you will need to provide very specific criteria of how you
propose that the stream will be protected during construction and permanently after construction. You noted
that the stream is low flowing however, based on the current radius of curvature of that area of the channel,
future erosion is very likely and will likely worsen with future development of the watershed as proposed by the
Industrial Park project.
Please provide detailed justification for the connection line at MH -7. The location of the connection line creates
parallel stream and buffer impacts that appear unnecessary if the connection point where shifted slightly along
the main sewer line.
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
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Will Larsen [mailto:[e-mail]]
Sent: Friday, April 06, 2018 3:53 PM
To: Homewood, Sue <[e-mail]>
Subject: RE: [External] EDGECOMBE: Kingsboro IP
External email. Do not click links or open attachme
Sue,
Thank you for the review and insight into our Kingsboro project.
Attached in the link below you will find the gravity sewer plan sheets with the contour layers cut on. Also
you will find the additional detail page providing the details on temporary ditch/stream crossing.
With respect to the proposed alignment for the gravity outfall:
We have proposed this alignment on the basis of 1) constructability and 2) elevation of the gravity
main.
1)The overall industrial park site is bisected by Walnut Creek and its primary unnamed
tributary. This creek and its tributaries are contained on each side by steep banks including natural
ridges. This topography creates a difficult constructability scenario in that a gravity alignment
running parallel to the creek will have to bisect ridges creating extreme side hill cuts of greater than
25 feet. By selecting an alignment generally closer to the stream and adjoining buffers, we are
reducing the opportunity for additional disturbance and potential negative impacts.
2) Additionally, the alignment was selected to maximize the service area of the proposed gravity
outfall. The intent of this line is to provide the wastewater backbone to serve the park and thus the
sewer needs to be as low in elevation as possible. Given streams and ditches represent the lowest
natural topography, it is reasonable to utilize these general locations to construct gravity sewer
outfalls to minimize the need for additional sewer outfalls and pump stations dispersed throughout
the park. As mentioned in Point 1, this particular topography contains extremely steep banks and
thus a shift in the alignment by 20-30 feet may result in the loss of 5-10 feet in sewer elevation
(assuming the same depth of cover). This loss in elevation reduces the potential service area by up
to 2,000 feet in each direction as well as creates an elevation profile in which the sewer shares a
similar elevation with the bottom of the creek thus making potential future connections more
difficult in that the future lines would be required to cross through the stream's wetted perimeter.

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Expires May 06, 2018
3.9 ME,
3.6 ME,
3.5 ME,
3.3 ME,
3.7 ME,
We anticipate providing the additional impact pages to you early next week. If there are any other questions or
concerns, please do not hesitate to call.
Regards,
William A. Larsen, PE
Project Engineer
The Wooten Company
301 West 14th Street
Greenville, NC 27834 0
252.757.1096
Fax [phone]
www.thewootenCOMDanv.com
T■
THE WGOTEN COMPANY
From: Homewood, Sue[mailto:sue.homewoodCancdenr.Qov]
Sent: Wednesday, April 04, 2018 11:42 AM
To: Will Larsen
Subject: RE: [External] EDGECOMBE: Kingsboro IP
Hi Will,
I'm sorry I didn't call you back last week, I had a busy week. I will let you know if I need any additional information once
I've reviewed the project.
Thanks,
Sue Homewood
Division of Water Resources, Winston Salem Regional Office
Department of Environmental Quality
336 776 9693 office
3

336 813 1863 mobile
Sue. Homewood (ED n cden r.gov
450 W. Hanes Mill Rd, Suite 300
Winston Salem NC 27105
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Will Larsen [mailto:[e-mail]]
Sent: Tuesday, April 03, 2018 5:11 PM
To: Homewood, Sue <[e-mail]>
Subject: [External] EDGECOMBE: Kingsboro IP
IIIVpa
ernal email. Do not click links or open attachments unless verified. Send all suspicious email as an attachment to
Ms. Homewood,
We have been informed that you are the reviewer for the recently submitted PCN application for the
Edgecombe County: Kingsboro Industrial Site project. Do you have an anticipated schedule for this
project's review?
If there are any questions or any additional material that we may supply to assist in your review, please do
not hesitate to let us know.
Regards,
William A. Larsen, PE
Project Engineer
The Wooten Company
301 West 14th Street
Greenville, NC 27834 0
252.757.1096
Fax [phone]
www.thewootencompany.com
THE WOOTEN COMPANY