20240840 Ver 1_More Info Received_20240809

Chandler, Rebecca D
From: Lawrence, Jennifer L CIV USARMY CESAW (USA) <[e-mail]>
Sent: Friday, August 9, 2024 2:33 PM
To: Chandler, Rebecca D
Subject: [External] FW: SAW-2024-01005 (Burke Mill Road / Winston Salem / Forsyth) - questions
Attachments: Revised Impact Drawings.pdf
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From: Catherine Carston <[e-mail]>
Sent: Thursday, August 8, 2024 2:29 PM
To: Lawrence, Jennifer L CIV USARMY CESAW (USA) <[e-mail]>
Cc: Brad Luckey <[e-mail]>
Subject: [Non-DoD Source] RE: SAW-2024-01005 (Burke Mill Road / Winston Salem / Forsyth) - questions
Jennifer, please find the below responses to your request for information.
USACE RFI 1- Can you speak more about the existing culvert upstream? I don't love the angle it's positioned at in
relation to the proposed culvert. Were options explored for removing it? If it has to be there, does engineering
calculations show any need for bank stabilization/toe protection on the right bank?
Applicant Response 1— The permittee evaluated removal of the existing culvert. The applicant's civil engineer has
designed the proposed culvert to utilize wing walls which will direct the stream into the proposed culvert for long term
stability and determined that the existing culvert and its surrounding conditions are in currently stable condition. The
removal of the existing culvert increases the construction costs of the project significantly that when combined with
overall project costs vs the yield of only 13 lots it is not economical feasible for the project to remove the existing
culvert. Based on the anticipated impacts to the construction cost of the project, the overall yield of the project, the
stable conditions of the existing culvert and design techniques including the use of an up -gradient wing wall of the
proposed culvert, the applicant has determined it is not reasonable to remove or alter the existing culvert.
USACE RFI 2 — The riprap apron has a callout that states 'rip -rap keyed into bank.' Please have this changed to 'keyed
into streambed.'
USACE RFI 3 — Can I see a profile view that shows a see-through/grayed out version of the catch basin so I can see the
invert of the catch basin? I need to be able to see the stream's path throughout the entire culvert.
USACE RFI 4 — Please add callouts with existing streambed elevation and the proposed culvert invert to the culvert
profile view to show that they will be buried at 20%.
USACE RFI 5 — Please include the riprap apron in the profile view.
Applicant Response 2-5 — Please see attached revised impact drawings.
Sincerely,
Catherine Carston
336.712.7381 (c)
336.310.4527 (o)
PO Box 128
Kernersville, NC 27285
oI Lor ENVIaoNMENr.L.1 NC

www.pilotenviro.com
[e-mail]
From: Lawrence, Jennifer L CIV USARMY CESAW (USA) <[e-mail]>
Sent: Monday, June 24, 2024 4:24 PM
To: Catherine Carston <[e-mail]>
Subject: SAW-2024-01005 (Burke Mill Road / Winston Salem / Forsyth) - questions
Hey Catherine,
I have a few questions about this project after reviewing the plans:
1
Can you speak more about the existing culvert upstream? I don't love the angle it's positioned at in relation to
the proposed culvert. Were options explored for removing it? If it has to be there, does engineering calculations
show any need for bank stabilization/toe protection on the right bank?
_ FE_ 792_VO
2. The riprap apron has a callout that states 'rip -rap keyed into bank.' Please have this changed to 'keyed into
streambed.'
3. Can I see a profile view that shows a see-through/grayed out version of the catch basin so I can see the invert of
the catch basin? I need to be able to see the stream's path throughout the entire culvert.
4. Please add callouts with existing streambed elevation and the proposed culvert invert to the culvert profile view
to show that they will be buried at 20%.
5. Please include the riprap apron in the profile view.
4

Please let me know if you have any questions.
Thanks,
Jennifer Lawrence, PWS (she/her)
Regulatory Specialist, Charlotte Regulatory Field Office
U.S. Army Corps of Engineers, Wilmington District
8430 University Executive Park Drive, Suite 615
Charlotte, NC 28262
Email: [e-mail]
Cell: [phone]