20211410 Ver 1_20211410_South Scales Street_Additional Info Requested_20220125

Carpenter,Kristi
From:Bailey, David E CIV USARMY CESAW (USA) <[e-mail]>
Sent:Tuesday, January 25, 2022 9:02 AM
To:Parker, Jerry A
Cc:Conchilla, Ryan; '[e-mail]'
Subject:\[External\] RE: South Scales Street Additional Info
Attachments:Pages from Floodplain Bench Ex. from NCDOT.pdf
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Thanks Jerry. Just for clarification, it sounds like the benches themselves will just be a layer(s) of rip rap, without any
native material mixed in and without re-vegetation? Am I understanding that correctly? I’m curious because, if that’s so,
it’s different than the usual design that results in the attached example. Perhaps this is specified in the Sediment and
Erosion Control Plans, but those don’t appear to have been included in the PCN package. Thanks, and please let me
know if you have any questions.
-Dave Bailey

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David E. Bailey, PWS
Regulatory Project Manager
US Army Corps of Engineers
CE-SAW-RG-R
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From: Parker, Jerry A <[e-mail]>
Sent: Monday, January 10, 2022 10:43 AM
To: Bailey, David E CIV USARMY CESAW (USA) <[e-mail]>
Cc: Conchilla, Ryan <[e-mail]>; '[e-mail]' <[e-mail]>
Subject: \[URL Verdict: Neutral\]\[Non-DoD Source\] South Scales Street Additional Info

Dave,

I have attached your email requesting additional info and provided answers in bold type. Please let me know if you have
any questions. Thanks.

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All,

Thank you for your PCN, dated 11/5/2021, for the above referenced project. I have reviewed the information and need
clarification before proceeding with verifying the use of Nationwide Permit (NWP) 14 (https://saw-
reg.usace.army.mil/NWP2017/2017NWP14.pdf). Please submit the requested information below (via e‐mail is fine)
within 30 days of receipt of this Notification, otherwise we may deny verification of the use of the Nationwide Permit or
consider your application withdrawn and close the file:

1) Thank you for your inclusion of floodplain benches in the design for this project. Please provide additional
details on the floodplain benches, including the material make-up (stream bed material? rip rap? mixture?) and
stabilization measures (coir fiber matting?) of the bench itself, as well as a planting plan for the bench; The
floodplain benches on the upstream and downstream side of the culvert will be constructed with Class II Rip
Rap in order to provide channel and bank stabilization in high flow events. The benches will be lined with
Geotextile fabric and native grass seeding and mulching will be performed on the disturbed riparian areas as
specified in the Sediment and Erosion Control Plans.
2) Please note that the Corps would require compensatory mitigation for the permanent stream impacts resulting
in a loss of waters, including Impacts S2 and S3 in this case (119 linear feet), as well as the main flow channel
realignment on the west side of SR 2670; please calculate the impacts currently listed as bank stabilization for
the portion of Impact S1 on the west side of SR 2670. The compensatory mitigation requirement for these three
impact types will be set at 2:1 (mitigation to impact ratio) unless otherwise justified based on aquatic resource
functional quality (typically documented by NCSAM). Note that compensatory mitigation is not typically required
for bank stabilization impacts limited to the banks where channel realignment is not required (e.g. the portion of
Impact S1 on the east side of SR 2670). After deducting the impacts for bank stabilization at Site 1, NCDOT is
now requesting mitigation for 119 feet of impacts rather than 188 feet of impacts.

Jerry Parker
Environmental Supervisor
Division 7
North Carolina Department of Transportation

336 256 2063 office
[e-mail]

1584 Yanceyville St.
P.O. Box 14996
Greensboro, NC. 27415-4996

Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties.
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