Oak Island Renourishment Project 2020_Permit Modification Request

4700 Falls of Neuse Road, Suite 300 ,,,'
Raleigh, NC 27609
m o f f a f i & n i a h o l [phone] Fax: [phone]
www.moffattnichol.com
June 5, 2020
Ms. Heather Coats
Division of Coastal Management
127 Cardinal Drive Extension
Wilmington, NC 28405
and
Mr. Ronnie Smith
USACE Wilmington District
Regulatory Division
69 Darlington Avenue
Wilmington, NC 28403
Re: Oak Island Renourishment Project — 2020/2021: Request to modify State and Federal
permits to remove the magnetometer buffer in Jay Bird Shoals Borrow Area
Dear Ms. Coats and Mr. Smith,
On behalf of the Town of Oak Island (Town), Moffatt & Nichol (M&N) is providing this letter to
request a minor permit modification to the Jay Bird Shoals Borrow Area, as permitted in the NC
Division of Water Resources WQC 004215, CAMA Permit No. 31-20, and the USACE Permit No.
SAW-2018-02230. The Town requests removal of the 50-foot buffer associated with a magnetometer
anomaly, identified as modern marine debris, within the currently permitted 304-acre Jay Bird Shoals
Borrow Area.
As described in the Town's October 2019 permit application, a magnetometer survey of Jay Bird
Shoals and resultant analysis by Tidewater Atlantic Research, Inc. (TAR), resulted in the identification
of eleven targets consisting of a tire, several small objects (i.e. traps), and deteriorated buried wire or
cable. To avoid dredging and placement of the marine debris during construction, a minimum 50-foot
buffer (on either side of the wire or cable) was instituted along the modern marine debris field (see
Figures 1 and 2 below).
Final preparations have begun for the implementation of the Project by the Town, with construction
anticipated for winter 2020/2021. Construction plans and specifications indicate the buffer area as a
no -dredge area. However, based on further analysis by TAR of the magnetometer anomaly and
confirmation the anomaly is modern marine debris, the Town would like to give the Contractor the
option to remove the marine debris using appropriate equipment to drag and remove the debris from
the borrow area and dispose of it properly. A letter has been provided by TAR documenting its
professional opinion (Attachment A). The removal of the marine debris and subsequently the buffer
would provide the Contractor more flexibility in its movement of the dredge within the borrow area
and allow for more uniform removal of material. A revised borrow area map depicting the removal of
the 50-foot buffer has been provided for your review (Attachment B).

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Lone 1 -26.0 859,851 559.851 4
Zone 2 -31.0 920,976 908,846
Zone 3 -27-0 1,276,591 1,185,475
Total 3,057,417 11 2,954,171
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-24 - -22
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M -26 - -24
•.
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- _20 - -18
- -28 - -26
s
JayBird Shoals Borrow Area
-22 - -20
-29.51 - -28
—
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Feet
Figure 1— Jay Bird Shoals Borrow Area with 50-foot buffer

4700 Falls of Neuse Road, Suite 300 ,,,'
Raleigh, NC 27609
m o f f a f t & n i a h o l [phone] Fax: [phone]
www.moffattnichol.com
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Figure 2 — Jay Bird Shoals Dredging Plan (provided in October 2019 permit application package)

4700 Falls of Neuse Road, Suite 300 ""
Raleigh, NC 27609
m o f f a t t 8c n i c h o l [phone] Fax: [phone]
www.moffattnichol.com
To clarify, the removal of the 50-foot buffer does not constitute a change in the borrow area footprint
and remains 304 acres, nor, does it result in a change in the volume of material to be dredged or placed
on the oceanfront shoreline. The removal of the buffer will allow the Contractor to selectively remove
the marine debris if it determines it necessary prior to construction. Only if the Contractor can locate
and document the successful removal of the marine debris will the buffer be removed.
The Town plans to host a pre -construction agency meeting prior to beginning construction to review
plans, permit conditions and project schedule. In the event this minor modification is granted, the
Town will provide an addendum to the Contractor to allow for evaluation and planning of the marine
debris removal.
Thank you for your consideration in this minor modification request. Please do not hesitate to call me
at 919-781-4626 or Dawn York at 910-218-7087.
Sincerely,
MOFFATT & NICHOL
Johnny Martin, P.E.
Project Manager
Copies furnished via email:
David Kelly, Town of Oak Island
Paul Wojoski, NCDWR 401 Permitting Branch

TIDEWATER ATLANTIC RESEARCH, INC.
Gordon P. Watts Jr., Director
252.975.6659/Fax: [phone]
Email: [e-mail]
19 April 2020
Ms. Dawn York
Senior Coastal Scientist
Moffatt & Nichol
238 Princess Street
Wilmington, North Carolina 28401
Dear Ms. York,
Post Office Box 2494
5290 River Road
Washington NC 27889-2494
In accordance with our 10 April 2020 telephone conversation, I would like to confirm my
opinion on the Jay Bird Shoal buffer. That buffer was not identified or recommended for
avoidance in our report on the remote -sensing survey. Analysis of the remote -sensing data
generated during the survey identified a total of 252 magnetic anomalies. Twenty-one
anomalies are associated with the low -intensity long -duration linear feature within the buffer.
That feature could be geological and represent a deposit of magnetic material such as
magnetite. By the same token, the feature could be associated with deteriorated pipeline,
wire rope, or armored cable.
The buffer was apparently recommended, possibly by Geodynamics, to identify material
generating the signatures as a potential hazard for dredging. While the feature does not
represent a submerged cultural resource that is eligible for inclusion on the National Register
of Historic Places, I agree that avoidance or removal should be considered. If the anomalies
do represent deteriorated pipeline, wire rope, or armored cable it would likely not be
something desirable to have broken up and deposited on the beach.
I hope this will help clarify our opinion regarding the buffer, the potential source of buffered
anomalies, and the lack of any historical significance.
Best regards,
41� —
Gordon P. Watts, Jr., Ph.D, RPA
Director

BRUNSWICK COUNTY
OAK ISLAND RENOURISHMENT PROJECT 2019/2020
OAK ISLAND, NORTH CAROLINA
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OAK ISLAND, NC 28465
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NTS ISSUED: 2019-08-16 G_001
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INDEX: 1 OF 22
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JB-#0 JAY BIRD SHOALS VIBRACORES
® JAY BIRD SHOALS BORROW AREA
---- MAG ANOMALY (MARINE DEBRIS)
JAY BIRD SHOALS
CONTROL POINT TABLE
POINT
NORTHING
EASTING
A
48860.91
2286099.73
B
48860.91
2290099.73
C
47860.91
2290099.73
D
47857.74
2287099.73
E
47360.91
2287099.73
F
46854.57
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G
46854.89
2288099.73
J
46856.16
2290099.73
K
43856.16
2290099.73
L
43856.16
2289099.73
M
44354.57
2289099.73
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45356.15
2288101.32
Q
46860.91
2286599.73
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46860.91
2286099.73
S
45860.91
2286099.73
45860.91
2285099.73
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47860.91
2285099.73
47860.91
2286099.73
JAY BIRD SHOALS
VIBRACORE POINT TABLE
POINT
NORTHING
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JB-01
47360.59
2286596.46
JB-02
47353.14
2287596.89
JB-03A
47352.99
2288596.24
JB-04A
47353.46
2289594.06
JB-05
46359.73
2286605.98
JB-06
46354.62
2287598.32
JB-07
46351.51
2288605.83
JB-08
46352.65
2289609.75
JB-09A
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2286606.37
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2287598.25
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2288592.58
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45348.52
2289595.11
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JB-14A
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2288598.53
JB-15
44361.78
2287596.08
JB-16A
44355.91
2286597.20
JB-17
46356.27
2285603.09
JB-18
47361.47
2285602.67
JB-19
48358.73
2285596.76
JB-20
48360.94
2286596.56
JB-21
48360.80
2287600.43
JB-22
48363.69
2288600.72
JB-23
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500' 0' 500' 1000'
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ISSUED: 2019-08-16
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INDEX: 20 OF 22
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30' 0' 30' 60'
VERTICAL SCALE: 1"=60'
300' 0' 300' 600'
HORIZONTAL SCALE: 1"=600'
FOR PERMITTING
ISSUED: 2019-08-16
NOT TO BE USED FOR CONSTRUCTION
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INDEX: 21 OF 22
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