20240279 Ver 1_More Info Received_20240327

From:
Michael Brame
To:
Tillery. Julia A CIV USARMY CESAW (USA)
Cc:
Chandler. Rebecca D; Homer. Seren M; jcollins(cbconceptbuilders.ne
Subject:
[External] RE: Request for Additional Info SAW-2019-00580 Shamrock Valley Ph.5-7 Graham NC
Date:
Wednesday, March 27, 2024 10:15:30 AM
Attachments:
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2024-26-03 Stream & Buffer Exhibits.pd
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Good Morning Julia,
The culvert was redesigned by the civil, engineer based on the comments below. The revised exhibits are attached.
PLease let me know if you need additional, information in order to move forward with the permitting process. Thanks
for your assistance.
Sincerely,
Michael T. Brame
336.708-4620 (c)
336.310.4527 (o)
PO Box 128
Kernersville, NC 27285
www.t)ilotenviro.com
mbrame(@pilotenviro.com
From: Tillery, Julia A CIV USARMY CESAW (USA) <[e-mail]>
Sent: Wednesday, March 13, 2024 3:41 PM
To: Michael Brame <[e-mail]>; [e-mail]
Cc: Chandler, Rebecca D <[e-mail]>; Homer, Seren M <seren. horner@ deq. nc.gov>
Subject: Request for Additional Info SAW-2019-00580 Shamrock Valley Ph.5-7 Graham NC
Importance: High
Reference is made to USACE Action I D SAW- 2019-00580
Thank you for your PCN, dated 2/15/24, for the proposed Shamrock Valley Phase 5-7 project. I have reviewed the
information and need clarification before proceeding.
The following information is required to complete our evaluation, confirm compliance with one or more General or
Regional Conditions, and/or complete consultation with another Federal/State agency to verify use of the Nationwide
Permit (NWP):

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1. Given the relatively steep slope (>3%) of the proposed culvert, and the angled junction box drop, we are concerned
that this stream would be subject to headcutting above the proposed culvert if the invert is buried and angled as
proposed. Field observations on 3/11/24 confirmed that this intermittent stream can have high flows capable of
transporting aquatic life. Topography and curve of the stream in this location also present obstacles for the proposed
design/location to comply with NWP terms and conditions and create a successfully functional passage for water and
aquatic life.
a. Given all factors relevant to this proposed crossing, it needs to be relocated either upstream or downstream
of the proposed and redesigned to meet NWP Regional Condition 9 Culvert Placement (see below and
attached).
b. Please confirm with NC-DWR (agents cc'd) regarding whether or not culvert burial angled with drop at
junction is required/advisable in this situation and at this location in the stream and landscape.
c. If burial of the culvert pipe is not advised, please redesign accordingly and update the PCN and applicable
plansheets.
Nationwide Permit Reuional Condition 9. Culvert Plocemen
a. For all NWPs that involve the constructionlinstallation of culverts, measures shall be included in the
constructionlinstallation that will promote the safe passage offish and other aquatic organisms.
Placement of culverts and other structures in streams shall be below the elevation of the streambed by onefootfor CH
culverts with a diameter greater than 48 inches, and 20% of the culvert diameterfor culverts having a diameter less than or
equal to 48 inches. If the culvert outlet is submerged within a pool or scour hole and designed to provide for aquatic
passage, then culvert burial into the streambed is not required.
Culvert burial is not requiredfor structures less than 72-inch diameterlwidth, where the slope of the culvert will be greater
than 2.5%, provided that all alternative options forflattening the slope have been investigated and aquatic life
movement1connectivity has been provided when possible (e.g., rock ladders, cross vanes, sills, baffles etc.). Culvert burial is
not required when bedrock is present in culvert locations.
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b. Bank-fullflows (or less) shall be accommodated through maintenance of the existing bank -full channel cross sectional
area. Additional culverts or culvert barrels at such crossings shall be allowed only to receive bank-fullflows.
Please note that responses to the questions above may prompt additional information requests to allowfull evaluation of

the proposed project.
c. Culverts shall be designed and installed in such a manner that the original stream profiles are not altered and allowfor
aquatic life movement during lowflows. The dimension, pattern, and profile of the stream above and below a pipe or culvert
shall not be modified by widening the stream channel or by reducing the depth of the stream in connection with the
construction activity. The width, height, and gradient of a proposed culvert shall be such as to pass the average historical
lowflow and springflow without adversely alteringflow velocity. If the width of the culvert is wider than the stream
channel, the culvert shall include multiple boxes/pipes, baffles, benches andlor sills to maintain the natural width of the
stream channel. If multiple culverts/pipes/barrels are used, lowflows shall be accommodated in one culvert/pipe and
additional culverts/pipes shall be installed such that they receive onlyflows above bankfulL
Please provide the requested information within 30 days (via email directly to me) or your application will be
administratively withdrawn.
Please contact me with any questions or concerns.
Best regards,
Julia
Julia Tillery
Regulatory Specialist, Raleigh Regulatory Field Office
US Army Corps of Engineers
CE-SAW-RG-R
3331 Heritage Trade Drive, Suite 105
Wake Forest, North Carolina 27587
Mobile: [phone]
Email: Julia.A.Tillerv(@usace.army.mil