20210204 Ver 1__External_ Crabtree Valley Interceptor Phase III _ Raleigh _ Wake County _ SAW-2017-00014 _ NWP 58_20230711

Baker, Caroline D
From: Phillips, George L CIV USARMY CESAW (USA) <[e-mail]>
Sent: Thursday, May 11, 2023 8:06 PM
To: [e-mail]
Cc: Thomas, Zachary T
Subject: [External] Crabtree Valley Interceptor Phase III / Raleigh / Wake County /
SAW-2017-00014 / NWP 58
Attachments: NWP58.pdf
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Dear Ms. Anna Rueusche,
I have reviewed the PCN for the above referenced project and have the following questions/comments.
1) The proposed activities include the permanent discharge of fill material within stream channels. The need for
sewer service is not disputed; however, it is unclear if the project at the locations of permanent fill within
stream channels have demonstrated avoidance and minimization to the maximum extent practicable as
required by NWP General Conditions 23(a) and (b). For example, could the proposed sewer infrastructure be
installed without permanent fill material (rip rap) within the stream bed?
2) Per general condition 32, the description of the proposed activity and any proposed mitigation measures should
be sufficiently detailed to allow the district engineer to determine that the adverse environmental effects of the
activity will be no more than minimal and to determine the need for compensatory mitigation or other
mitigation measures. The nature of the proposed permanent fill material within the stream channels is unclear.
Based on a review of the plans it appears that rip rap stone is proposed within the stream channel, within the
cover letter the permanent fill is described as salvaged stream bed material and rip rap, and within the PCN
impact table the impacts are listed as culvert. Please provide an undated description of the areas that are
proposed to be permanently impacted by a discharge of fill material.
3) Per NWP 58, there must be no change in pre -construction contours of waters of the United States for the
installation of utility lines. Per NWP 58, access roads must be as near as possible to pre -construction contours
and elevations (e.g., at grade corduroy roads or geotextile/gravel roads). Based on a review of the plans
provided it appears that stream bed elevations at crossing location will result in a change of pre -construction
contours of waters. However, based on the application it is unclear if these changes occur for an access road or
for stabilization. Please provide clarification.
4) Please provide any updated drawing that result from the comments above.
5) In order to verify compliance with General Condition 18, the Corps will initiate informal consultation with The US
Fish and Wildlife Service and will not be able to render a decision until ESA Section 7 consultation is complete.
Please submit the above information within 30 days of receipt of this Notification or we may consider your application
withdrawn and close the file. Please email (George.L.Phi Ili [e-mail]) me if you have any questions.
Lyle Phillips
Regulatory Project Manager
US Army Corps of Engineers
CE-SAW-RG-R
3331 Heritage Trade Drive, Suite 105
Wake Forest, North Carolina 27587
Phone: [phone]

Fax: [phone]
Email: George. L.Phil [e-mail]
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