20201987 Ver 1_CAMA Application_20201218

4700 Falls of Neuse Road, Suite 300 ,,,'
Raleigh, NC 27609
moffatf & nichol [phone]
www.moffattnichol.com
November 24, 2020
Ms. Heather Coats
N.C. Division of Coastal Management
127 Cardinal Drive Ext.
Wilmington, NC 28405
Subject: CAMA Major Permit Modification — Submittal
2021/2022 Oak Island Renourishment Project
Town of Oak Island, Brunswick County
Dear Ms. Coats,
On behalf of the Town of Oak Island, please find enclosed a CAMA Major Permit modification for permit
#31-20 for the above referenced project. The permit package includes information in support of authorizing
the excavation of 1.667 mcy of beach -quality sediment for the purpose of providing protection to the
oceanfront infrastructure and resources of Oak Island.
This CAMA Major permit modification includes the addition of: 1) deeper dredging depths in Jay Bird
Shoals -with supplemental modeling; 2) an additional borrow area identified as Central Reach; 3) a new
placement area; and 4) an adjusted dune slope to accommodate USFWS concerns.
After conducting the scoping meeting and follow up conversations, the following information is also being
provided: 1) certified mail tracking numbers, 2) results and discussion of additional Munsell color testing for
Central Reach, 3) supplemental profiles to document the historic location of the dune, 4) recreational beach
widths before project (2016) and anticipated after project equilibration, 5) location of native samples with
respect to historical nourishment project, 6) an updated plan set with 2020 Post Isaias aerial, 2016 vegetation
line, and monitoring baseline, and 7) adjustments to shift the template alignment landward on the west end
(within the IHA) and east end (Stations 210-230).
Please note, the application fee of $475 was already provided under a separate cover from the Town of Oak
Island.
As the authorized agent for the Town of Oak Island, please feel free to contact me if you have any questions
or need additional information.
Sincerely,
MOFFATT & NICHOL
Johnny Martin, PE
Coastal/Hydraulic Engineer

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July 29, 2020
NC Division of Coastal Management
Wilmington Regional Office
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
Re: Authorized Agent Agreement
2021/2022 Renourishment Project
Town of Oak Island, Brunswick County
To Whom It May Concern:
Phone [phone]
Fax [phone]
This is to inform you that Moffatt & Nichol has been approved by the Town of Oak Island to act
as the Authorized Agent for the above -referenced project. Moffatt & Nichol is authorized to act
on behalf of the applicant on matters related to the NCDCM Major Permit and related federal
permits.
Please call me if you have any questions or need additional information.
Sincerely,
David Kelly
Town Manager
[phone]
[e-mail]
4601 E. Oak Island Drive • Oak Island, North Carolina 28465
Phone: [phone] • Fax: [phone] • Website: www.oalcislandnc.com

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North Carolina Division of Coastal Management
Major Permit Modification #31-20
2021/2022 Oak Island Renourishment Project
Oak Island, Brunswick County, North Carolina
November 24, 2020
Proposed by:
Town of Oak Island
Brunswick County, North Carolina
Prepared for:
North Carolina Department of Environmental Quality
North Carolina Division of Coastal Management
127 Cardinal Drive Extension
Wilmington, North Carolina 28405
Prepared by:
MOFFATT & NICHOL
4700 Falls of Neuse Road
Suite 300
Raleigh, North Carolina 27609

Table of Contents
1.0
INTRODUCTION.................................................................................................................................1
1.1
Background...................................................................................................................................1
1.2
Purpose and Need.........................................................................................................................4
2.0
DECRIPTION OF THE PROPOSED ACTION..........................................................................................5
2.1
Project Description........................................................................................................................5
2.2
Methods of Construction............................................................................................................26
2.3
Sediment Compatibility...............................................................................................................30
2.3.1
Native Beach Sediment.......................................................................................................30
2.3.2
Proposed Borrow Area Sediment.......................................................................................32
2.4
Jay Bird Shoals Borrow Area Modeling.......................................................................................45
2.5
Survey Data Collection................................................................................................................47
3.0
CULTURAL RESOURCES...................................................................................................................50
4.0
PROPOSED CONSERVATION MEASURES.........................................................................................51
5.0
COMPLIANCE WITH BRUNSWICK COUNTY AND CAMA LAND USE PLAN.......................................56
6.0
COMPLIANCE WITH THE NC ENVIRONMENTAL POLICY ACT..........................................................56
7.0
CONSTRUCTION EASEMENTS..........................................................................................................56
8.0
COMPLIANCE WITH DWR WATER QUALITY CERTIFICATION..........................................................56
9.0
REFERENCES....................................................................................................................................57
APPENDIX A — Permit Drawings
APPENDIX B1— Sediment Compatibility Analysis & Vibracore Logs for Jay Bird Shoals
APPENDIX B2 — Sediment Compatibility Analysis & Vibracore Logs for Central Reach
APPENDIX C — Oak Island Geophysical Survey
APPENDIX D1 -D4—Jay Bird Shoals Borrow Area Modeling
APPENDIX E — Central Reach Archaeological Assessment
APPENDIX F — Eastern Channel Shorebird Monitoring Report
APPENDIX G — Post -Construction Monitoring Procedure
APPENDIX H — Letter of Intent to Obtain Perpetual Easements
APPENDIX I — Scoping Meeting Summary
APPENDIX J —Supplemental Profiles
ATTACHMENT 1NCDCM MP — 1 Application
ATTACHMENT 2NCDCM MP — 2 Excavation and Fill
NCDCM Major Permit Modification #31-20 Moffatt & Nichol
2021/2022 Oak Island Renourishment Project November 2020

LIST OF FIGURES
Figure1-1. Vicinity and Location Map..........................................................................................................2
Figure 1-2. Summary of Oak Island Renourishment History.........................................................................3
Figure2-1. Project Map................................................................................................................................7
Figure 2-2. Oak Island Borrow Areas............................................................................................................8
Figure 2-3. Jay Bird Shoals Borrow Area Cross Sections.............................................................................11
Figure 2-4. Jay Bird Shoals Borrow Area Dredging Plan..............................................................................12
Figure 2-5. Central Reach Borrow Area Cross Sections..............................................................................13
Figure 2-6. Central Reach Borrow Area Dredging Plan...............................................................................14
Figure 2-7. Typical Construction Template Cross Sections.........................................................................18
Figure 2-8. IHA Station 670+00 Historical Profiles with Construction Template........................................20
Figure 2-9. IHA Station 672+00 Historical Profiles with Construction Template........................................21
Figure 2-10. IHA Station 674+00 Historical Profiles with Construction Template......................................21
Figure 2-11. IHA Station 676+00 Historical Profiles with Construction Template......................................22
Figure 2-12. IHA Station 678+00 Historical Profiles with Construction Template......................................22
Figure 2-13. Representative Equilibrated Construction Template for Stations 210+00 - 230+00.............
24
Figure 2-14. Representative Equilibrated Construction Template for Stations 510+00 - 550+00.............
25
Figure 2-15. Representative Equilibrated Construction Template for Stations 560+00 - 590+00.............
25
Figure 2-16. Representative Equilibrated Construction Template for Stations 600+00 - 630+00.............
26
Figure2-17. Staging Areas..........................................................................................................................29
Figure 2-18. Native Sediment Sample Transects........................................................................................30
Figure 2-19. Clast Survey Areas...................................................................................................................32
Figure 2-20. Jay Bird Shoals Borrow Area...................................................................................................34
Figure 2-21: Central Reach Borrow Area....................................................................................................39
Figure 2-22. Central Reach Borrow Area Proximity to AR-430...................................................................40
Figure 2-23. Central-08 wet versus dry sample..........................................................................................43
Figure 2-24. After -dredge bathymetry effects on residual tidal currents over a spring neap tidal cycle ..46
Figure 2-25. Wave induced longshore sediment transport gradients along Caswell Beach shoreline ......47
Figure 2-26. Sidescan Sonar Survey Coverage of the Central Reach Borrow Area.....................................48
Figure 2-27. Sub -bottom Grid Survey Coverage.........................................................................................49
Figure 2-28. 3-D View of Sub -bottom Grid.................................................................................................49
Figure 2-29. Multibeam Survey Coverage of the Central Reach Borrow Area...........................................50
Figure 4-1. Post -Construction Monitoring of Caswell Beach......................................................................55
NCDCM Major Permit Modification #31-20 Moffatt & Nichol
2021/2022 Oak Island Renourishment Project November 2020

LIST OF TABLES
Table 2-1. Proposed vs Previously Permitted Dredging Elevations..............................................................9
Table 2-2. Preliminary length and renourishment fill volume....................................................................17
Table 2-3. Recreational Beach Width Comparison.....................................................................................23
Table 2-4. Native Beach Characteristics and NCAC Rule Parameters.........................................................31
Table 2-5. Native Beach Sediment Statistics...............................................................................................31
Table 2-6. Jay Bird Shoals Dredge Elevations..............................................................................................33
Table 2-7. Jay Bird Shoals sediment characteristics of material proposed for placement on Oak Island.. 35
Table 2-8. Jay Bird Shoals sediment statistics of material proposed for placement on Oak Island ...........35
Table 2-9. Jay Bird Shoals composite sediment characteristics of proposed beach fill compared to native
sediment.....................................................................................................................................................36
Table 2-10. Jay Bird Shoals composite sediment statistics of proposed beach fill compared to native
sediment..................................................................................................................................................... 36
Table 2-11. Central Reach Dredge Elevations.............................................................................................38
Table 2-12. Central Reach sediment characteristics of material proposed for placement on Oak Island .41
Table 2-13. Central Reach sediment statistics of material proposed for placement on Oak Island ..........41
Table 2-14. Central Reach composite sediment characteristics of proposed beach fill compared to native
sediment.....................................................................................................................................................42
Table 2-15. Central Reach composite sediment statistics of proposed beach fill compared to native
sediment.....................................................................................................................................................42
Table 2-16. Template Dredging Elevations.................................................................................................45
NCDCM Major Permit Modification #31-20 Moffatt & Nichol
2021/2022 Oak Island Renourishment Project November 2020

1.0 INTRODUCTION
1.1 Background
The Town of Oak Island (Town) is located along the Atlantic Ocean, in Brunswick County, NC
between the Cape Fear River Inlet and Lockwoods Folly Inlet. The Town can be accessed by
driving south from Wilmington on U.S. Highway 17 past the towns of Belville and Bolivia, then
following SR 1500 south across the Atlantic Intracoastal Waterway (AIWW) to the barrier island
(Figure 1-1 cover sheet of permit drawings provided in Appendix A).
The history of renourishment projects on Oak Island dates back to 2001 with the introduction of
the Wilmington Harbor Sand Management Plan (WHSMP). WHSMP refers to the deepening
project administered by the United States Army Corps of Engineers (USACE) and the periodic
maintenance of the harbor entrance, within the Cape Fear River Inlet. The initial project by the
USACE deepened the Wilmington Harbor in 2001 and placed material along the eastern and
western portions of the Oak Island shoreline. Following the initial project, Oak Island has received
beneficial placement of material from the WHSMP in 2009 and 2018. In 2001, the USACE also
conducted a sea turtle habitat restoration project across the central portion of the island. The
material for this restoration project came from Yellow Banks, an upland borrow area. This project
unintentionally placed rocks on the beach still present today despite removal efforts by the Town.
In 2009, the USACE dredged the Lockwoods Folly River Crossing and placed material on the
western end of Oak Island's shoreline. In 2015, the Town sponsored the Lockwoods Folly Habitat
Restoration Project, which consisted of maintenance dredging of the navigation channel within
Eastern Channel with beneficial placement of compatible material on the western end of Oak
Island. After Hurricane Matthew (October 2016), the Town initiated and completed an
emergency dune restoration project to place material from an upland borrow source along 4.4
miles of shoreline. In 2019, material from the AIWW at Lockwoods Folly Inlet was beneficially
placed on the western end of Oak Island's shoreline by the USACE. The eastern and western ends
of Oak Island's shoreline experience periodic renourishment as sand is readily available from the
inlets on either end of the island with established programs by the USACE. The central portion of
the island has not experienced a significant renourishment event since 2001. The Town received
federal and state permits (SAW-2018-02230, NC Coastal Area Management Act (CAMA) Major
Permit #31-20) for a renourishment project in winter 2020/2021 to place up to approximately
1.1 million cubic yards (mcy) along 21,000 ft of oceanfront shoreline between 10th PI. W to SE
63rd St. (Stations 300+00 to 500+00). All past USACE and Town renourishment project placement
volumes and extents discussed above are shown in Figure 1-2.
NCDCM Major Permit Modification #31-20
2021/2022 Oak Island Renourishment Project
Moffatt & Nichol
November 2020
1

OAK ISLAND RENOURISHMENT PROJECT 2021 /2022
OAK ISLAND, NORTH CAROLINA
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Figure 1-1. Vicinity and Location Map
NCDCM Major Permit Modification #31-20
2021/2022 Oak Island Renourishment Project
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TOWN OF OAK ISLAND
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Moffatt & Nichol
November 2020

Figure 1-2. Summary of Oak Island Renourishment History
NCDCM Major Permit Modification #31-20 Moffatt & Nichol
2021/2022 Oak Island Renourishment Project November 2020

1.2 Purpose and Need
The Town is vulnerable to significant damage from storms since the overall beach profile has
been lowered substantially, as evidenced by the landfall of Hurricane Isaias on August 3, 2020.
Essentially, there is no protective dune throughout most of the oceanfront. The Town was
recently authorized to complete an emergency sand push in September 2020 (CAMA Major
Permit #140-10) to provide immediate protection to the oceanfront. Shoreline and dune erosion
as a result of storm surge and overwash during Hurricanes Matthew (2016), Florence (2018), and
now Isaias (2020) were particularly significant along the proposed project area. In 2017/2018, as
a result of Hurricane Matthew, the Federal Emergency Management Agency (FEMA) provided
funding for construction of a temporary protection measure in the form of an 'emergency berm'
which placed approximately 25,000 cubic yards (cy) of material in the proposed project area to
provide immediate protection to significantly damaged sections of dune until a full project could
be completed. With the passing of Florence and Michael in 2018, Dorian in 2019, and Isaias in
2020, this emergency material has served its purpose to provide immediate protection. The Town
is taking proactive measures to restore the oceanfront shoreline and dune while providing
necessary protection. The purpose of the proposed project is to provide long-term protection to
infrastructure from a 25-year return period storm event and provide additional protection at a
known 'hotspot' located on the West End of the island. This'hotspot' coincides with the area the
USACE nourished with material from the Lockwoods Folly Inlet/AIWW crossing in 2019.
For the Town to maintain adequate cash flow, the renourishment of the entire oceanfront is
being completed in separate projects. This proposed 2021/2022 Renourishment Project is the
second planned over the next 3-5 years (2020 and beyond). The first project, the 2020/2021
renourishment project, was authorized under CAMA Major Permit #31-20, this second
2021/2022 Renourishment Project is to be covered under a major modification to that permit.
The Town has been actively coordinating with both FEMA and the NC Department of
Environmental Quality (NCDEQ) to secure funding to mitigate for the extensive erosion
experienced from these hurricanes. The project planned for the winter of 2021/2022 will be
constructed using Post -Florence federal and state funding, as well as local funding. The project
which is currently planned for winter 2022/2023 (or later depending on Town cash flow) will be
considered the initial project for the Town's Master Beach Renourishment Plan. The focus for the
initial Master Plan project will be replacing any dune volume lost in the interim, as well as
providing advance fill for additional storm protection in the form of a recreational berm in front
of the dune across the island. In addition, the advance fill will serve as the buffer to maintain the
profile needed for the 25-year return period storm event protection over an expected 6-yr
renourishment interval.
NCDCM Major Permit Modification #31-20
2021/2022 Oak Island Renourishment Project
4
Moffatt & Nichol
November 2020

The proposed 2021/2022 project features a dune designed to withstand a 25-year return period
storm event as well as a sloped berm at a 20H:1V. In addition to the dune, some areas of the
beach have a template that incorporates a berm at elevation 7.0 ft North American Vertical
Datum 1988 (NAVD88) with a width that ranges from 15 — 55 ft. Due to increased erosion
experienced at the West End 'hotspot', a 120 ft wide berm has been added to the dune template
in this area to help mitigate the increased erosion. In areas where the existing dune already meets
protection for a 25-year return period storm event, the template consists of only a berm width
of 70 ft to meet the minimum construction fill requirements of 15 cubic yards of material per
linear foot of shoreline (cy/ft). The template design varies across the oceanfront due to offshore
bathymetry tie ins, existing dune conditions, and minimum fill requirements based on
construction feasibility and equipment. However, all template designs provide the 25-year return
period storm event protection.
The proposed 2021/2022 project involves dredging approximately 1.667 mcy of beach -quality
sand from a combination of Jay Bird Shoals and Central Reach borrow areas.
The need for the proposed 2021/2022 Renourishment Project is to protect and preserve a large
portion of the Town's infrastructure, tourism industry, tax base, and enhance recreational beach
access for the public.
During the proposed 2021/2022 Renourishment Project, the Town has several objectives. Those
objectives are summarized as follows:
• Provide protection to ocean susceptible infrastructure and property while maintaining tax
revenues to the Town, County, and State.
• Preservation of the environmental, cultural, and aquatic resources of the Town and
County.
2.0 DECRIPTION OF THE PROPOSED ACTION
2.1 Project Description
Borrow Areas
The proposed 2021/2022 project consists of excavating approximately 1.667 mcy (includes
assumed 30% dredge losses) of beach -quality sediment from a combination of Jay Bird Shoals
and Central Reach borrow areas. Given the borrow area cut elevations in Jay Bird Shoals there is
sufficient beach compatible material available to allow for all the 1.667 mcy to be taken from this
borrow area, if necessary. However, up to 615,000 cy of beach compatible material is available
to be excavated from the Central Reach borrow area. The use of two borrow areas will provide
NCDCM Major Permit Modification #31-20
2021/2022 Oak Island Renourishment Project
Moffatt & Nichol
November 2020
5

the contractor with flexibility in constructing the project in a cost-effective manner, due to the
distance of the Jay Bird Shoals borrow area from the west end of Oak Island.
The Jay Bird Shoals borrow area is situated a distance of approximately one mile offshore of the
Oak Island/Caswell Beach shoreline (Figure 2-1). This will be the second dredging event to utilize
material from this Jay Bird Shoals borrow area, the first dredging event being the permitted
2020/2021 Renourishment Project. Other portions of Jay Bird Shoals have been included in
previous renourishment events for the Village of Bald Head Island (Figure 2-2). The closest sail
distance from the borrow area to the placement area is about 1.8 miles and the farthest sail
distance from the borrow area to the placement area is about 10.9 miles. The proposed borrow
area within Jay Bird Shoals is approximately 304 acres, the same footprint permitted for the
2020/2021 project.
The Central Reach borrow area is situated a distance of approximately 1.9 miles offshore of the
Oak Island shoreline (Figure 2-1). Portions of the Central Reach borrow area have been included
in a previous renourishment event for the Town of Holden Beach (Figure 2-2). The closest sail
distance from the borrow area to the placement area is about 1.9 miles and the farthest sail
distance from the borrow area to the placement area is about 4 miles. This borrow area would
be utilized to provide a cost-effective sand source for portions of the western project placement
extent. The proposed borrow area is approximately 180 acres.
NCDCM Major Permit Modification #31-20
2021/2022 Oak Island Renourishment Project
Moffatt & Nichol
November 2020
0

IswNE V �
� TOTAL FILLVOLVME� 1
Figure 2-1. Project Map
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NCDCM Major Permit Modification #31-20
2021/2022 Oak Island Renourishment Project
ATLANTIC OCEAN
AR 435 11 1 1- Rpy,_
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PpTENTALPucEMENT AREA PREVI 1u PERMITTED UNDERG C­
OINCLNEEAFF1111DIATE FILL LENGTH OF4.JW FT All FI LL VOL1.E OF
3. R PLACEMENT OF ANY PROL ECT EO LIPME HT AROUND
AR-42 AND
AR-C3]. A
FOR PERMITTING
.UE,, 202E 11-0E RG-004
NOT TO EE VEEE FOR CO NSTflUOU_
3 4 6 6
FA
Moffatt & Nichol
November 2020

Temporary charq - of defects n oda to bOW( er' —d
7 .n r.n r o_ i 1 .r. o" C'a :Part. Be. Guattl Light LiSI and U.5 Coast Pilot for details. become exposed, Manners Should use extreme
I un1- Nchcc to Ida9nc:;. I
caution when operslng vessels in depths of
Q` water comparable to heir draft in we..where
V \`. C,','F FCAa HIVE pipelines and cables may exist, and when
Thr ci -c-.1, pr 11 381Pn ' hti-,ton anchoring, dragging, or trawling.
- - U>.. 11r. 1 94. IhTF:1CG%•.5-1.�'Pr:� ER'aTh, 'eixhs and channel rs 4 .3-1Covered wells may be marked by lighted o+
_,I, I1-
co m..-k�ls r-rr n::t _�owi� lie=rc�- unlighted buoys.
9q BRUNSWICK COUNTY {/ l
__ ll•1 �fiPCOASTAL IV/ '1((( z
+Iri ll', v..nnu. ..•:r _ __ Gam' v7r, c °p NjeI�6 Pit - Gt Oak
Island
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Potential Placement Area 460+00-- 500+00 1 j 'ks J I M m F,,; 'sty yo k.F
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a /
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ae 55, 37 �� 59 Kdera &1e~s Boundary S3.' / 'I' y -°//'duo
T9 C 1 2ss_' '' I
,2gM1. 34 {2fif06strr 1933 )
Legend 43 2q 37 314 31 23 7-/' 24 QfY
Oak Island Monitoring Transects R"32 35 �17 �' 1
Q Oak Island Jay Bird Shoals Borrow Area 40 39 ssn tea, , 28 2s 22
2 5 " 24
3 39 33 7 �1 Fl A 2.5s
Bald Head Island Jay Bird Shoals Borrow Area 34 31
G 7 25
35 Q Oak Island Central Reach Borrow Area 3e FIG2. L
q° � � 42 4p �2
Holden Beach Central Reach Borrow Area 37 39 3g �/n�� 3s � A 63
„
N .� SSh Co M14 ;Rk FIR4 35
0 0.5 1 2 3 4 39
//3/28 1
6 Mlles 3a 37 ws' 42 � �1 38
45 43 99 ' 55urrp,�Ci 4a !\\;�\
(dredped mekrrgl \ \
Figure 2-2. Oak Island Borrow Areas
NCDCM Major Permit Modification #31-20
2021/2022 Oak Island Renourishment Project
9
Moffatt & Nichol
November 2020

Using vibracore data collected in 2019 (1,000 ft spacing), three different zones and cut elevations
(with 2 ft of overdredge allowance) within the Jay Bird Shoals borrow area have been identified.
Since this is an ebb shoal environment, these three varying cut elevations are intended to
maintain the integrity of the shoal and minimize the effect on the nearshore wave environment
and adjoining Caswell Beach oceanfront shoreline. The borrow area cross sections are shown in
Figure 2-3. Wave modeling was performed to quantify potential effects along the Bald Head
Island, Fort Caswell, Caswell Beach, and Oak Island oceanfront (see Section 2.4). An area of
approximately 304 acres within the outer edge of Jay Bird Shoals (Figure 2-4) has been identified
to contain approximately 4.67 mcy of beach compatible material. The footprint of the Jay Bird
Shoals borrow area is the same as was previously permitted, but the proposed elevations in
NAVD88 for this permit modification are deeper as shown in Table 2-1.
Table 2-1. Proposed vs Previously Permitted Dredging Elevations
Previously
Proposed Elevation
Zone
Permitted Elevation
(ft-NAVD88)
(ft-NAVD88)
1
-28.0
-26.0
2
-37.0
-31.0
3
-29.0
-27.0
While the proposed template theoretically contains 4.67 mcy of beach compatible material, this
volume is significantly reduced due to several factors, such as:
• The 1.1 mcy that will be removed to complete the 2020/2021 Renourishment Project.
• The level of control/accuracy in the dredging process due to the unstable working
environment (waves).
• To avoid a permit violation, the contractor will naturally leave a buffer between the target
dredging elevation and the permitted elevation; this can be as much as 2-3 ft.
• The contractor will typically try to avoid areas that were previously dredged that do not
have enough material remaining above the permitted elevation. These areas are both
inefficient to dredge and pose a much higher risk of dredging below the permitted
elevation. Thus, some of the previously dredged areas utilized during the 2020/2021
Renourishment Project may not be used or will be deemed too risky to use by the
contractor.
• There are shallower areas within the proposed borrow area where a hopper dredge may
not be able to operate for safety reasons (i.e. draft of vessel is deeper than ocean floor).
NCDCM Major Permit Modification #31-20
2021/2022 Oak Island Renourishment Project
Moffatt & Nichol
November 2020
0

If a hopper dredge is the only available and reasonable equipment to be used by a
contractor then shallower areas of the borrow area will not be used.
• The proposed project has operating requirements for a hopper dredge stating that the
dragheads must stay on the bottom for sea turtle protection. This operating constraint is
challenging to borrow areas if there is not a sufficient buffer of material below the
contractor's target dredging elevation and the permitted elevation. The contractor will
typically avoid areas that do not have a sufficient buffer.
• Marine debris has been identified in Zone 2 and 3. The contractor will most likely avoid
the debris by applying their own elected safe buffer distance for their dredging operations
to avoid removing the debris. This will reduce the volume available unless it is determined
that this debris can safely be removed by the contractor.
After accounting for the 1.1 mcy removed during the 2020/2021 Renourishment project and the
2 ft overdredge allowance volume (buffer for dredging inaccuracies, not to provide additional
volume), approximately 2.59 mcy will be available in the Jay Bird Shoals borrow area to meet the
need for the approximate 1.667 mcy dredge quantity for the 2021/2022 Renourishment Project.
Using vibracore data collected in 2019 (1,000 ft spacing), four different zones with unique cut
elevations (with 2 ft of overdredge allowance) within the Central Reach borrow area have been
identified. The borrow area cross sections are shown in Figure 2-5. The Central Reach borrow
area consists of approximately 180 acres (Figure 2-6) of which 1.18 mcy of beach compatible
material has been identified. After accounting for the 2 ft overdredge allowance volume (buffer
for dredging inaccuracies, not to provide additional volume), approximately 615,000 cy will be
available to meet the need for the approximately 1.667 mcy dredge quantity for the 2021/2022
Renourishment Project. The Central Reach borrow area is meant to provide a cost-effective
borrow area for material needed for portions of the west end of the project.
Detailed sediment characteristics and vibracore logs for the borrow areas are provided in
Appendix 131 and B2. Material placed on the beach will be consistent with the NC Coastal
Resources Commission (CRC) sediment compatibility standards. Placed material will be visually
monitored for sediment quality daily (via visual inspection) and weekly (via sediment analysis).
Weekly reports will be provided to the agencies.
NCDCM Major Permit Modification #31-20
2021/2022 Oak Island Renourishment Project
Moffatt & Nichol
November 2020
10

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FOR PERMITTING
ISO ueo.zuzo-ivla
NOT TO BE - FOR CON6TRl1CTION
Figure 2-3. Jay Bird Shoals Borrow Area Cross Sections
NCDCM Major Permit Modification #31-20
2021/2022 Oak Island Renourishment Project
11
Moffatt & Nichol
November 2020

1 2 1 4 5 8
N
LEGEND
A0 PROPOSER BORROW AREA CONTROL POINT
JB- JAV BIRR SHOALS bIBRAGORES
L0J3IB w21m oa ®JA.BRNG o GBORRow R�
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MAG ANOMALY
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1 1 0 J6 R2 0 J6-COP Q JBsi4A�
-7ONE2EL o0E
p (a�FiO OCEI JAY BIRD SHOALS JAY BIRO SHOALS D
CONTROL POINT TABLE VIBRACORE POINT TABLE
POINT NORTHING EASTING PRINT NORTHING FASTING
> - ] A 40050.91 22EB]59.➢3 JB-01 4]300.59 ?2PG�95.4G a � 0
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FOR PERMITTING
ISSUED' 2020-11-18 RC-119
NOT TO BE 1—FOR CONSTRUCTION _
1 2 S 4 5 6
Figure 2-4. Jay Bird Shoals Borrow Area Dredging Plan
NCDCM Major Permit Modification #31-20
2021/2022 Oak Island Renourishment Project
12
Moffatt & Nichol
November 2020

ZONE t TARGET EL 33.3
�+z Fr ovEreoREo� 1
m ,� GRouNo �
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(c—iN SECTION C3 SEC710N'
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Figure 2-5. Central Reach Borrow Area Cross Sections
NCDCM Major Permit Modification #31-20
2021/2022 Oak Island Renourishment Project
13
FOR PERMITTING
issued: MIT I a
E—DF
Moffatt & Nichol
November 2020

N
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= CONTROL POINTS TABLE V19-RE CONTROL TABLE
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Figure 2-6. Central Reach Borrow Area Dredging Plan
NCDCM Major Permit Modification #31-20
2021/2022 Oak Island Renourishment Project
14
o E 1
FOR PERMITTING
ISSUED, 2o2o-1v1E RC-120
sufio �<
Moffatt & Nichol
November 2020

Construction Templates
The renourishment placement area is approximately 26,100 ft (-5 miles) along Oak Island, refer
to Appendix A for the complete set of permit drawings. Based on the bids received for the
2020/2021 Renourishment Project, the 2021/2022 Renourishment Project will also likely include
placement over 4,300 linear feet, approximately Stations 460+00— 503+00, of the area permitted
under the 2020/2021 Renourishment Project (Figure 2-1). The material placed under either
project will not exceed the authorized volumes and permit extents. Sediment will be spread via
land -based equipment and shaped into a dune. The beach fill will involve approximately 197
acres of beach and inshore area. The main fill portions of the project will contain an average of
50 cy/ft. On average, the proposed project construction templates will move mean high water
(MHW) seaward approximately 93 feet.
There are some variations in the construction template across the island, some areas with dune
only (Stations 501+00 — 620+00), some areas with berm only (Stations 235+00 — 275+00), and
some areas with a combination of dune and berm (Stations 210+00 — 235+00 , 275+00 — 295+71,
and 620+00 — 676+36). These variations are a result of working with existing conditions to meet
the 25-year return period storm event protection. The dune crest elevation varies between 13.0
ft and 15.5 ft NAVD88 across the project; the dune crest width is consistently 10 ft. The original
design of the front and back dune slopes of 5H:1V have been a topic of discussion between
Moffatt & Nichol, NC Division of Coastal Management (NCDCM), USACE, US Fish and Wildlife
Service (USFWS), and NC Wildlife Resources Commission (NCWRC). The original dune slopes were
5H:1V to allow for public safety and access at dune walkover locations. A concern was raised
about the lack of steepness of the original design of the front dune slope as it pertains to a sea
turtle's ability to climb up the dune and nest behind, increasing the risk of the adult turtle or
hatchlings becoming trapped behind the dune. The final design of the front dune slope was
adjusted to 4H:1V to alleviate concerns for nesting sea turtles while maintaining the back dune
slope at 5H:1V for ease of human walkover (the Town does not have structural dune walkovers).
It is expected that the front slope of the dune will steepen quickly during winter wave conditions
to a 3H:1V. This slope is close to the angle of repose for loose clean sand and is close to the
steepest slope that could be feasibly constructed.
The front dune toe will transition at elevation 7.0 ft NAVD88 and then continue out with a 20H:1V
slope until it ties into the existing profile between elevation -1.0 ft and -10.0 ft NAVD88. Some
locations will have a berm at elevation 7.0 ft NAVD88 and then continue out with a 20H:1V slope
until it ties into the existing profile. The foreshore slope was chosen to best replicate the natural
slope of the beach in efforts to mitigate significant profile equilibration directly after placement;
NCDCM Major Permit Modification #31-20
2021/2022 Oak Island Renourishment Project
Moffatt & Nichol
November 2020
15

however, mild equilibration of the profile is still expected and will be monitored as required by
the NC Statewide Programmatic Biological Opinion.
In the eastern most portion of the beach fill between Stations 210+00 — 235+00, the construction
template consists of both a dune and a berm. The dune elevation is 15.0 ft NAVD88. The berm
elevation is at 7.0 ft NAVD88 with a width of 15 ft. The berm is included in the template to help
meet a minimum beach fill of 15 cy/ft to ensure constructability for the contractor.
Between Stations 235+00 — 275+00 the construction template consists only of a berm at
elevation 7.0 ft NAVD88, the berm width is 70 ft. The berm width was determined to meet a
minimum beach fill of 15 cy/ft to ensure constructability for the contractor. In this area a dune is
not included in the construction template since the existing dunes provide enough protection for
the 25-year return period store event.
Between Stations 275+00 — 295+71 the construction template consists of both a dune and a
berm. The dune elevation is 14.5 ft NAVD88. The berm elevation is at 7.0 ft NAVD88 with a width
of 55 ft. The berm width was determined to meet a minimum beach fill of 15 cy/ft to ensure
constructability to the contractor. Station 295+71 marks the end of the project on the eastern
portion and where it will tie into the previous 2020/2021 Renourishment Project.
The western portion of the beach fill starts at Station 501+00 which is where the previous
2020/2021 Renourishment Project is permitted to end. Between Stations 501+00 — 620+00 the
construction template consists only of a dune. The dune elevation varies from 13.0 ft to 14.0 ft
NAVD88. The dune will break at elevation 7.0 ft NAVD88 and then continue out with a 20H:1V
slope until it ties into the existing profile.
On the west end of the island in the 'hotspot' area covering Stations 620+00 — 676+36 the
construction template consists of both a dune and a berm. The dune elevation varies from 13.0
ft to 15.5 ft NAVD88. The berm elevation is at 7.0 ft NAVD88 with a width of 120 ft. The berm
width in this area was determined based on the quantity of beach compatible material available
in the Central Reach borrow area as well as expected erosion rates. Station 676+36 marks the
western end of the project.
All the above described construction templates have been designed to withstand a 25-year return
period storm event. Typical construction template cross sections are shown in Figure 2-7. Filling
the construction template described above will require approximately 1.282 mcy of sand to be
placed within the project area.
NCDCM Major Permit Modification #31-20
2021/2022 Oak Island Renourishment Project
Moffatt & Nichol
November 2020
16

Taper sections which are approximately 500 ft long will tie the template fill into the natural
shoreline at the ends of the project. The dune will be planted with native sea oats and bitter
panicum; to be installed on 18" centers. A summary of the renourishment placement and fill is
shown in Table 2-2.
Table 2-2. Preliminary length and renourishment fill volume
Approximate
Average Unit
Reach
Renourishment
'Reach
Project
Geographic
Fill Volume
Volume
Reach
Length (ft)
Station
Location
(cy/ft)
(cy)
Oak Island East
210+00 to
McGlamery St. to
End
8,600
300+00
SE 63rd St.
23
195,500
Oak Island
500+00 to
7t" Place West to
12,000
35
411,000
West
620+00
515t Place W
Oak Island
620+00 to
515t Place W to The
5,500
120
675,500
West End
680+00
Point
'Reach length includes 500-ft taper section at the beginning and end of reach.
NCDCM Major Permit Modification #31-20
2021/2022 Oak Island Renourishment Project
Moffatt & Nichol
November 2020
17

STA 210+00 TO STA 235+00
D1 $EC TIONFr
STA 235 00 TO STA 275 X
C7 SECTtlION
�$ ouuE vmo7ri,a0'ME oPEe ELro 5L BERM SLOPE B0.EAK EL ] 0
STA 275+00 TO STA 295-71
AP1 SECTyONeL
2
Figure 2-7. Typical Construction Template Cross Sections
NCDCM Major Permit Modification #31-20
2021/2022 Oak Island Renourishment Project
<.o
GRO NB DUKE 11 � n
STA 501+00 TO STA 620+00
D3 SECTION M.
�IL.Al El
'UNE TOP EL,aoia iss
au NE —TN lou
BERM SLOPE B—EL 7.0
GROBINa
MY NW i9
STA 620r00 TO STA 647rOO & STA 659r5O TO STA 665r50
C3 SECL50N_o
PLANING OCCNRS ON CREST
9 BACKSLOPE OF RUNE
UUNE WIB BERM SLOPE BREAK EL 7.0
BERM SLOPE El —EL 70
l
EXIST-
H.
41;1 MSi MiL�LW29'
TIENEL ]AID
18
STA 647+00 TO STA 659+50 & STA 665+50 TO STA 676+34
A3 SETm.
4 1 5
VERTICAL SCALE. 1-- A `—
®i
FOR PERMITTING
155UE0'. 292U11-18 C.303
NOT TO BE us6a FORCONSTRl1CTION
6
Moffatt & Nichol
November 2020

The existing ground survey used to develop the 2021/2022 Renourishment Project construction
template was collected three days after Hurricane Isaias hit Oak Island. The existing ground
survey demonstrates a severely eroded beach before any recovery, natural or otherwise (i.e.
emergency dune pushing or placement of overwash sand), could take place. It is understood that
conditions of the beach will change from what is being shown on plans by the time construction
is anticipated to take place (winter 2021/2022). However, since the plans are based on this
severely eroded state (worst case scenario) it is expected some recovery will occur prior to
construction. This recovery could change what is shown on plans by shifting the landward
construction template tie in seaward (out from underneath or right in front of homes) and
possibly reduce the seaward movement of MHW or vice -versa depending on the state of the
beach at the time of construction.
In addition, some portions of the construction template on the west end (Station 647+00 —
659+50, 665+50 — 676+36) include a level landward tie in at elevation 7.0 ft NAVD88 behind the
dune, which will be vegetated. This is to prevent the creation of a trench behind the dune and
avoid potential turtle hatchling entrapment in the event a nest ends up behind the dune. By the
time the project is constructed, it is expected that some recovery will have taken place to
eliminate the need for this design feature, however it is being shown based on the Post -Isaias
survey used to design plans.
Of further note, surveys are collected on profile lines spaced approximately 1,000 ft apart,
meaning that the survey in between these 1,000 ft spaced profiles is interpolated. This
interpolation over 1,000 ft creates some inaccuracy from actual conditions. These inaccuracies
are corrected in the field before and during construction when more closely spaced surveys (100
ft) are obtained.
As described previously, the Town has been impacted by several hurricanes, including Matthew
(2016), Florence (2018), Dorian (2019), and Isaias (2020) and has been unable to complete a
large-scale renourishment project to restore beach conditions. As a result, there has been
substantial loss of recreational berm, dune, and native dune vegetation across the oceanfront.
As requested during the project scoping meeting, the construction template is overlain on the
2020 Post -Isaias aerial image (Appendix A) with the digitized 2016 vegetation line displayed for
reference. NCDCM has proposed to the CRC to designate Unvegetated Beach Areas of
Environmental Concern (AEC) for two areas of the shoreline. Both of the proposed areas, from
approximately Station 430+00 to 550+00 and Station 660+00 to 674+00, are within the limits of
the 2021/2022 Renourishment Project. With the absence of any existing vegetation it may be
desirable to move the dune alignment further landward. However, doing that also moves MHW
closer to structures and affects the vegetation line setback used for development purposes. The
NCDCM Major Permit Modification #31-20
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location and alignment of the construction template is based on historical profiles and
construction feasibility. It is important to the Town to maintain a historic dune and vegetation
alignment which existed prior to Hurricane Matthew (2016). The design intent is to provide the
shoreline with protection from future storms and ensure that this level of protection is
continually maintained as part of the Master Plan.
Inlet Hazard Area
A portion of the Inlet Hazard Area (IHA) coincides with the western end of the project from
Station 667+65 — 675+65, which corresponds with monitoring Stations 670+00 — 678+00. As
noted in the Specific Use Standards for Ocean Hazard Areas, 15A NCAC 7H.0308(b)(5), within the
IHA "no new dunes shall be created". The final design location of the dune within the IHA
underwent several iterations, in collaboration with NCDCM, to adhere to the guidance. The
monitoring station profiles shown in Figure 2-8 through Figure 2-12 display the available
historical survey for the profiles within the IHA and how the construction template intends to
restore the previously existing dune. The 200-ft spaced stations only have historical survey dating
back to 2018. The structure locations shown are representative, as the profile applies to adjacent
areas, and may not line up exactly with their physical location.
Monitoring Sta 670+00 (Project Sta 667+65)
ii�iisi�vii�■ �����
■CCC�I �CCC�CCC�CCCCC
! =5mmm1C _ ! � =�l•I���
I�I�I�I�I�■■al��i�I�I�I�iI�I�I�I�I�I�
-5tructu re -2014 -2015 2016 -Past Matthew
-2017 -2018- PostHoreno[ -2019- Post Weian
- 2020 -Post Isaias -----Construction Template
Figure 2-8. IHA Station 670+00 Historical Profiles with Construction Template
NCDCM Major Permit Modification #31-20
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November 2020
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Monitoring Sta 672+00 (Project Sta 669+65)
■■■■■■ ■■■■■
■■■■■■- ■■ ■■■■■■
■■■■■I■■■ice �i�`� ��
■■■■■■I■■■■■■■■■■■■■■■■
MM C■■■M■i■■■=■■■M■■■M■■■■
■ ■■■
Structure 2018 -Post Florence 2019 -Post Corian 2020 -Post Isaias -----Construction Template
Figure 2-9. IHA Station 672+00 Historical Profiles with Construction Template
20
1s
16
14
12
70
O 4
4 2
2
Cz ❑
S 4
w$
•10
-12
-14
-16
-is
-20
Monitoring Sta 674+00 (Project Sta 671+65)
■C
■■■■■■1■■■■■■
'
■�■'
�~
�: '
--ter..
i.N.
-100 So 0 50 100 150 200 250 300 350 400 4S0 500 550 600 650 700 750 SW 8S0 900 950 1000
Distance from Basallne (ft)
Structure 2018 -Post Florence 2019 -Post Oarian 2020 -Post luoi - - - - -: onstructipn Template
Figure 2-10. IHA Station 674+00 Historical Profiles with Construction Template
NCDCM Major Permit Modification #31-20
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24
22
20
is
16
14
12
10
s
6
7
4 -0
2
il 2
2
W 4
•10
-12
-14
•16
-18
-20
I
Monitoring Sta 676+00 (Project Sta 673+65)
-100 -50 0 59 100 M 200 250 300 35n 4W 4S9 500 550 600 650 700 750 SW 850 900 950 1000
Usts nee From Basallne (h)
Structure 2018 -Post Florence 2019 -Post Oorian 2020 Post lsaias -----Construction Template
Figure 2-11. IHA Station 676+00 Historical Profiles with Construction Template
PA
■■.■■■l■■MM wN.L1% ■■!..■■■
■M■■■l■■■E,�r`� ��w r
NO
I■■■■■l■■■■■■■_■■■_■■■■
MMMMEI■ ■��=Mm■■■■■■
■■■■■■lam■ ■■■■■■■■■
Structure 2018 -Post Florence 2019 -Post Dorian 2020 -Post Isaias - - - - -: onstru[tion Template
Figure 2-12. IHA Station 678+00 Historical Profiles with Construction Template
NCDCM Major Permit Modification #31-20
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November 2020
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Construction Templates Equilibration
To quantify the equilibration, or profile adjustment over the first 12 months (Willson, et al. 2017),
the construction template at four representative locations within the project area were chosen.
The SBEACH model was used to produce an output profile from the 2-yr storm which was used
as an assumption of the resulting equilibrated construction template. Oak Island has over 9 miles
of oceanfront containing 60 monitoring profiles. SBEACH modeling of the renourishment
equilibration is not feasible at every location within the project limits, which is why
representative locations were chosen. Station 220+00 was chosen to represent from 210+00
through 230+00, Station 540+00 was chosen to represent from 510+00 through 550+00, Station
570+00 was chosen to represent from 560+00 through 590+00, and Station 600+00 was chosen
to represent from 600+00 through 630+00. These stations were carefully chosen to best
represent the given reach. This analysis was only performed at the representative locations
within the project where there was a concern that the recreational beach width would be
negatively impacted during equilibration; therefore, construction templates consisting of a dune
and berm (greater than 15ft wide) combination or berm only were not analyzed. The recreational
beach width is assumed to be the horizonal distance between elevation 7.0 ft NAVD88 (berm)
and 1.8 ft NAVD88 (MHW). The recreational beach width for the Pre -Matthew profiles was
averaged over the profiles within a given reach and compared to the representative equilibrated
beach fill template. The results are shown in Table 2-3. Within each reach, the recreational beach
width after equilibration is wider than the Pre -Matthew recreational beach width; therefore, the
equilibrated construction template will not negatively impact the recreational beach width when
compared to the 2016 (Pre -Matthew) conditions when a dune was present within the project
area.
Table 2-3. Recreational Beach Width Comparison
Average 2016 Pre-
Representative 21/22 Post Fill
Reach
Matthew Recreational
Equilibration Recreational
Beach Width (ft)
Beach Width (ft)
210+00 - 230+00
69
86
(Rep Profile: 220+00)
510+00 - 550+00
61
73
(Rep Profile: 540+00)
560+00 - 590+00
60
82
(Rep Profile: 570+00)
600+00 - 630+00
57
96
(Rep Profile: 600+00)
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Equilibration results from SBEACH are shown in Figure 2-13 through Figure 2-16, the
preconstruction profiles shown in the figure are from the June 2019 survey. The model indicates
that material placed in the dune and sloped berm will be transported to the offshore bar. Mild
equilibration of the dune profile is also expected; however, this will act as a sand source for the
sloped berm over time.
Representative Equilibration Profile 220+00 (210+00 - 230+00)
18
16
— — — -- -- -- -- -- -- --- --
14
--- -- -- -- -- -- -- -- --
12
-- -- -- -- -- -- -- -- --
— -- -- -- -- -- -- --
i10
b
00
8
-- — — -- -- -- -- -- --
-.
z
4
'
MHW
°
0
-- -- -- — ' -- -- -- -- --
- 2
-- -- -- -- -- -- --
aa
W-4
-- -- -- -- — — -- -- --
-6
-- -- -- -- -- -- -- -- --
-10
-- -- -- -- -- -- -- — —
-12
-100
0 100 200 300 400 500 600 700 800
Distance from Baseline (ft)
Preconstruction------- ConstructionTemplate Equilibration
Structure Location Pre Matthew 2016
Figure 2-13. Representative Equilibrated Construction Template for Stations 210+00 — 230+00
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18
16
14
12
10
0 8
6
z 4
c
2
0 0
> -2
a)
W -4
-6
-8
-10
12
Representative Equilibration Profile 540+00 (510+00 - 550+00)
0 100 200 300 400 500 600 700 800
Distance from Baseline (ft)
Preconstruction------- ConstructionTemplate Equilibration
Structure Location Pre Matthew 2016
Figure 2-14. Representative Equilibrated Construction Template for Stations 510+00 — 550+00
Representative Equilibration Profile 570+00 (560+00 - 590+00)
18
16
14
12
10
0 8
6
z 4
c
2
0 0
> -2
a�
W -4
-6
-8
-10
-12
MEN
0 100 200 300 400 500 600 700 800
Distance from Baseline (ft)
Preconstruction------- ConstructionTemplate Equilibration
Structure Location Pre Matthew 2016
Figure 2-15. Representative Equilibrated Construction Template for Stations 560+00 — 590+00
NCDCM Major Permit Modification #31-20
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Representative Equilibration Profile 600+00 (600+00 - 630+00)
18
16 — -- -- -- -- -- -- --
14 — -- -- -- -- -- -- --
12 — — -- -- -- -- -- --
ib
10 -- — -- -- -- -- -- --
00 8 -- — -- -- -- -- --
Q6 -- --- -- -- -- -- --
z
4 -- --- — -- -- -- -- --
MHW
2 -- --- —-------
0 0
.,
2 -- --- -- —
W-4 -- --- -- -- -- -- --
-6 -- --- -- -- -- -- --
-8 -- --- -- -- -- — --- --
-10 -- --- -- -- -- --
-12
0 100 200 300 400 500 600 700 800
Distance from Baseline (ft)
Preconstruction------- ConstructionTemplate Equilibration
Structure Location Pre Matthew 2016
Figure 2-16. Representative Equilibrated Construction Template for Stations 600+00 — 630+00
2.2 Methods of Construction
The proposed project would involve the use of either a hopper dredge or a cutter suction
(hydraulic) dredge to excavate sand from Jay Bird Shoals borrow area and the Central Reach
borrow area.
Hopper dredges are self-propelled vessels that employ trailing suction draghead(s) to remove
sediment from the seafloor. The draghead is equipped with various types of steel cutting teeth
or blades and/or high-pressure water nozzles that dislodge thin layers (approximately one to
three feet deep) of sediment from the seafloor. A mixture of loose sediment and water is pumped
through a suction pipe into a hopper onboard the dredge. Sediment settles in the hopper and
excess water is discharged via an overflow system (i.e. scuppers). Once fully loaded, the hopper
dredge would travel from the borrow area to a nearshore pump -out station along the target
beach.
As specifically described by Hales (1995) the proposed methodology includes removing dredged
material from the hopper dredge, where the dredge moors to a nearshore pump -out station
NCDCM Major Permit Modification #31-20
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November 2020
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which is typically an anchored floating structure, buoy, or multiple buoy berths. The nearshore
pump -out station will be situated in 25-35 ft of water and an underwater pipeline will extend
from the pump -out station to shore. A hose is connected from the pump -out station to the
hopper -dredge discharge manifold. The dredge then mixes the dredged material with water to
form a slurry and pumps the slurry from its discharge manifold through the floating hose to the
anchored floating pump -out station and on through the underwater pipeline toward shore where
it would be pumped onto the recipient beach (Hales 1995). Once empty, the dredge would then
return to the borrow area and the cycle of dredging and discharging would be repeated.
Equipment refueling would occur as needed by fuel barge or at the Port of Wilmington. The
position of the nearshore pump -out station and underwater discharge pipeline would be
relocated as necessary as construction progresses along the beach.
Cutter suction dredges are stationary dredges that are moored at the borrow area by either spuds
or a series of anchors and wires. The equipment employs the use of a rotating cutterhead that
loosens the material from the sea floor. Just behind or within the cone of the cutterhead is a
suction pipe that gathers the loosened material from the sea floor in a material and water mixture
called a slurry. The cutter suction dredge (CSD) is connected to a pipeline that stretches from the
borrow area to the final placement location via a series of floating and submerged pipelines.
Generally, a CSD will have approximately 1,500 ft of floating hose/pipeline directly connected to
the stern of the dredge. This floating pipeline allow the dredge to move throughout the borrow
area to dredge/gather the material. This floating pipeline is connected to a submerged pipeline
that is laid along the sea floor from the borrow area to the recipient beach. The submerged
pipeline is connected to land -based pipelines that helps to distribute the material throughout the
beach placement area. Additional subline would be added in the borrow area should the 1,500
feet of floating line not allow the CSD to reach all permitted dredging areas.
To collect the material the CSD swings the bow of the dredge (cutterhead) back and forth within
the borrow area in an arc like pattern moving the dredge forward a few feet with each swing of
the dredge. The cutterhead is engaged/buried within the seafloor to a depth of approximately
two to eight feet (depending on the allowable cut depth) while swinging back and forth. The
material that is loosened becomes fluidized and is pulled into the suction pipe in a slurry and is
pumped directly to the recipient beach through the series of pipes described above.
A couple of primary differences between the hopper dredge and the CSD is the hopper dredge
removes the material in thin layer passes and may take multiple passes in order to reach the
desired elevation; the CSD will take all available material to the desired elevation in one pass and
generally does not cover an area twice. Also, a hopper dredge needs deeper water to operate
within the borrow area because material loads into a hopper on the vessel, for transport, which
NCDCM Major Permit Modification #31-20
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November 2020
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dramatically increases their draft during the loading cycle. Since the CSD is directly pumping the
material onshore the draft of the vessel does not change and therefore can operate in much
shallower waters.
Placement and grading activities on the beach would involve the use of bulldozers to redistribute
and grade the beach fill material to the proposed beach profile. Land -based equipment will be
brought to the site over public roads and will enter the beach at existing permanent beach
accesses. Equipment can be stored at staging areas shown on Figure 2-17. Existing vegetation on
the beach will be avoided and preserved; however, any alteration of vegetation necessary for
equipment access will be repaired to pre -project conditions following project completion. Daily
equipment staging will be on the constructed beach seaward of the dune line. Construction
contracts will provide for proper storage and disposal of oils, chemicals, and hydraulic fluids etc.
necessary for operation in accordance with state and federal regulations.
Work will progress in sections within the borrow area(s) and along the beach. Fill placement along
the beach will typically progress at a rate of 400-700 linear feet per day. Construction activities
will involve movement of heavy equipment and pipe along approximately 1 mile reaches over a
period of 1-2 weeks. Once a section is complete, piping and heavy equipment will be shifted to a
new section and the process repeated. As soon as practicable, sections will be graded and
dressed to final slopes. Other than at temporary equipment staging areas, residents and visitors
along the project area will not experience significant disruption to recreational activities except
within the immediate construction area. The majority of existing public access to the beach will
remain open at all times during construction, except for a few that may be used for staging/access
areas, again see Figure 2-17. Offshore pump -out stations and appurtenances would not affect
commercial or recreational boating.
Based on other project experiences, one hopper dredge can excavate and place on the order of
10,000—15,000 cy in a 24-hour period. Dredging and grading would occur around the clock, thus
requiring nighttime lighting on the beach and onboard the dredge. It is anticipated the proposed
construction will be accomplished in approximately three to four months, unless multiple
dredges are deployed on the project which would shorten the construction period. All beach fill
construction activities would take place within the 16 November through 30 April environmental
window.
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KINOs �vNN � ne n�,H DMZ
I
{
. . . . . .... .
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STAGING AREA 1 STAGING AREA 2
STAGING AREA 3
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G 22624 22325�.4t 492 bt 3]1.64 224E&2fi.84 Saab fi0�t962 22]t232 ]0 t123
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Figure 2-17.Staging Areas
NCDCM Major Permit Modification #31-20
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29
SURVEY CONTROL
N
A
FOR PERMITTING
ssueo:zoza-1]-ie RG-oae
NCi TC BE USE!) FOR CONSTRUCTION -
8
Moffatt & Nichol
November 2020

2.3 Sediment Compatibility
2.3.1 Native Beach Sediment
Sediments on the native beach were sampled by Athena in 2019. This established a native grain
size distribution for purposes of compatibility analyses with borrow areas. The native sediment
distribution for Oak Island was defined based on the percent gravel, granular, sand, fine-grained,
and calcium carbonate present in samples taken from 13 locations along a defined transect as
specified in NC Administrative Code 15A NCAC 07H.0312(1). These 13 samples were than
averaged to obtain a composite average for the transect. Eleven transects were sampled along
the shoreline of Oak Island (Figure 2-18) with efforts to maintain required spacing while also
avoiding recent renourishment projects.
v.. Oak Island.
19,z20 I I
zz•7;iscy �Y 1,270 �600cy¢<
121s300 cy 4,057 cY 7,930 c 2,650r000 cy
Y 12803 cy,. SU9,8 0
23,170 Cy
93,686..`y 336, 1
yv
Legend
— Native Sample Locations
H 2O01 Initial Construction New 44' Channel
—4, 2001 Sea Turtle Habitat restoration
H 2O09 Lockwacds Folly River Grossing
2009 Wilmington Harbor Maintenance Dredging
2015 Lockwood Folly Habitat Restoration
2017f18 Hurricane Matthew FEMA Emergency Dune
H 2O18 Wilmington Harbor Maintenance Dredging
H► 2019 AI W W Crossing
Aerial Imagery, NAIP2016
0 6,000 12,000 Feel
Figure 2-18. Native Sediment Sample Transects
NCDCM Major Permit Modification #31-20
2021/2022 Oak Island Renourishment Project
rll��
`Y605,000 �y,1
511,300 cy
Moffatt & Nichol
November 2020
30

The composite average for each of the 11 transects were then averaged to obtain a global mean
for the native beach. The composite average from all 11 transects will be used to classify native
material as opposed to only using the composite average for the transects that fall within the
project area. A summary of the characteristics for the native beach is provided in Table 2-4. The
table also demonstrates the acceptable grain size criteria for beach placement in accordance with
15A NCAC 07H.0312(3), which establishes consistent standards for native grain size for all future
projects. The native material is characterized as fine-grained sand under the American Society
for Testing and Materials (ASTM) Unified Soil Classification System with a mean grain size of 0.26
millimeter (mm). The native beach is coarse skewed and moderately sorted, as indicated by the
native beach sediment statistics presented in Table 2-5.
Table 2-4. Native Beach Characteristics and NCAC Rule Parameters
Characteristic
2019 Native
Global Mean
NCAC
Requirements
NCAC Maximum
Gravel (>#4)
Reported: 0.45%
native + 5%
<_ 6%
Granular (>#10 & <#4)
Reported: 0.71%
native + 10%
<_ 11%
Sand (>#230 & <#10)
Reported: 96.96%
-
-
Fines (<#230)
Reported: 1.88%
native +5%
<_ 7%
Calcium Carbonate
Reported: 9.72%
native + 15%
<_ 25%
Table 2-5. Native Beach Sediment Statistics
Sediment
Compatibility
2019 Native
Global Mean
Median (mm)
0.26
Median ((0)
1.97
Mean (mm)
0.27
Mean (4))
1.90
Standard
Deviation (64))
0.81
Moffatt & Nichol conducted field investigations on October 28, 2019 to estimate the total
number of shell and rock material greater than or equal to three inches in diameter, observable
on the surface of the beach between mean low water and the frontal dune toe, in a 50,000 square
foot area based on requirements in 15A NCAC 07H.0312(4)(c). The investigation was performed
in the area shown in Figure 2-19 between Stations 460+00 and 470+00. This area had received
NCDCM Major Permit Modification #31-20
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November 2020
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nourishment in the spring of 2018. Results of the investigation found 58 pieces of shell material
greater than or equal to three inches in diameter.
Figure 2-19. Clast Survey Areas
2.3.2 Proposed Borrow Area Sediment
JAY BIRD SHOALS BORROW AREA
Vibracores in the Jay Bird Shoals borrow area were obtained by American Vibracore Services
(AVS) in February and March of 2019. Figure 2-20 gives the location of vibracores and the
bathymetry of the proposed borrow area within Jay Bird Shoals. Using a multibeam bathymetric
survey collected by Geodynamics in 2019 (see Appendix C), volume calculations indicate
approximately 3.69 mcy of material exists in the three (3) zones within the Jay Bird Shoals borrow
area when excluding the 2 ft of overdredge allowance material. It is assumed that the first project
in 2020/2021 will remove approximately 1.1 mcy from the borrow area, which would leave 2.59
mcy in the borrow area for the project in 2021/2022. The 2021/2022 Renourishment Project has
an expected total dredge volume of 1.667 mcy. Therefore, the material within the Jay Bird Shoals
borrow area will be enough to fully cover the dredge volume for the 2021/2022 project if the
contractor chooses.
The borrow area was divided into three (3) zones as beach compatible material exists down to
varying elevations across the shoal. The dredge elevation within these zones was decreased
moving onshore over the shoal to replicate the natural contours of the shoal system, see Table
2-6. The average cut depth, not including overdredge, across Zone 1 is 5.8 ft, Zone 2 is 9.8 ft, and
Zone 3 is 6.9 ft. Since this is a shoal environment, these cut depths are intended to maintain the
integrity of the shoal by not allowing waves to break closerto shore and cause unintended effects
on the adjacent shoreline. A comprehensive modeling report for the Jay Bird Shoals borrow area
is provided in Appendix D and a summary of the modeling is discussed in Section 2.4.
NCDCM Major Permit Modification #31-20
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Table 2-6. Jay Bird Shoals Dredge Elevations
Design
+2 ft Overdredge
Deepest Compatible Material
Zone
Elevation (ft,
Allowance (ft,
Elevation (ft, NAVD88)
NAVD88)
NAVD88)
1
Varies between -32 and -40.5
-26.0
-28.0
2
Varies between -39.5 and -41.5
-35.0
-37.0
3
Varies between -33 and -38
-27.0
-29.0
Sediment characteristics and statistics are presented in Table 2-7 and Table 2-8. As noted, the
sediment characteristics and statistics presented consider a composite average down to the
design elevation for each zone.
Appendix B1 provides a summary of sediment descriptions including mean grain size, percent
gravel, percent granular, percent fines (<#230), percent carbonate, and Munsell color. The
composite averages shown in Appendix B1 will be different than the composite averages shown
in Table 2-7 and Table 2-8. Appendix B1 shows the composite average for the entire vibracore
sample, while Table 2-7 and Table 2-8 show the composite average for the vibracore down to
the design elevation (with overdredge) for each zone. The borrow area vibracores meet all the
grain size criteria for beach placement as established in 15A NCAC 07H.0312 (Table 2-9). The
typical sediment type in Jay Bird Shoals is medium -grained sand (mean size = 0.34 mm) that is
coarse skewed and poorly sorted. This preliminary comparison shows the proposed borrow area
sediments to be similar to the native material (Table 2-10).
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0
0
N
0
m
a
34000
2288000
2292000
.a
CG
•a+
a
�� • + �
han
r C
9Ste
1
1
Zone 1
JB-19 JB-20
JB-21
JB-22 JB-23
O •
•
• ,• -
JB-18 JB-01
JB-02
JB-03 JB-04
Zone 2
0 0
JB-17 JB-05
JB-06
JB-07 JB-08
�
\
I
Zone 3
o
•
• •
JB-09
JB-10
JB-11 JB-12
j
6
0•
JB-16
JB-15
JB-14 JB-13
W
Alo
8 C5
10
Zone
Dredge Elevation
(ft, NAVD88)
Volume (cy)
Overdredge Elevation
(ft, NAVD88)
Volume (cy)
Zone 1
-26.0
858,209
-28.0
1,154,975
Zone 2
-35.0
1,555,584
-37.0
1,870,282
Zone 3
-27.0
1,275,617
-29.0
1,645,805
Total
3,689,410
4,671,062
2284000 2288000 2292000
0 •
Iso 2s
9
4.
rf r Legend Elevation (ft NAVD88)
• Jay Bird Shoals Vibracores _ -29.51 - -28 -21.99 - -20
` Marine Debris-27.99--26-19.99--18
j -25.99 - -24 -17.99 - -16
Jay Bird Shoals Borrow Area
-23.99 - -22 - -15.99 - -14
0 750 1,500 3,000 N
Feet
Figure 2-20. Jay Bird Shoals Borrow Area
NCDCM Major Permit Modification #31-20 Moffatt & Nichol
2021/2022 Oak Island Renourishment Project November 2020
34

Table 2-7. Jay Bird Shoals sediment characteristics of material proposed for placement on Oak Island
Sediment
Compatibility
Zone 1 Dredge Elevation -26 ft NAVD88
(+2 ft overdredge -28 ft NAVD88)
Zone 2 Dredge Elevation -35 ft NAVD88
(+2 ft overdredge -37 ft NAVD88)
Zone 3 Dredge Elevation -27 ft NAVD88
(+2 ft overdredge -29 ft NAVD88)
JB-20
JB-21
JB-22
JB-23
JB-01
JB-06
JB-17
JB-18
JB-07
JB-08
JB-11A
JB-12
JB-13
Gravel
1.92%
1.24%
1.33%
0.17%
1.60%
1.85%
0.77%
1.20%
2.89%
0.74%
2.94%
1.37%
3.67%
Granular
4.40%
2.30%
2.72%
0.90%
2.78%
3.14%
1.73%
5.47%
6.43%
3.55%
6.82%
3.20%
5.02%
Sand
88.61%
92.30%
91.18%
96.52%
91.36%
88.79%
93.03%
89.09%
84.26%
91.72%
85.66%
90.97%
86.41%
Fines
5.07%
4.16%
4.77%
2.41%
4.26%
6.22%
4.46%
4.23%
6.43%
3.99%
4.58%
4.46%
4.90%
Carbonate
15.34%
18.42%
11.08%
10.32%
14.24%
13.29%
11.49%
24.06%
10.24%
10.11%
18.43%
9.95%
16.85%
Median (mm)
0.23
0.29
0.26
0.24
0.28
0.29
0.25
0.29
0.26
0.29
0.26
0.22
0.29
Mean (mm)
0.32
0.33
0.32
0.27
0.34
0.37
0.28
0.36
0.38
0.34
0.37
0.29
0.41
Note: characteristics represent the composite average down to specified zone dredge elevation with overdredge.
Table 2-8. Jay Bird Shoals sediment statistics of material proposed for placement on Oak Island
Zone 1 Dredge Elevation -26 ft NAVD88
Zone 2 Dredge Elevation -35 ft NAVD88
Zone 3 Dredge Elevation -27 ft NAVD88
Sediment
(+2 ft overdredge -28 ft NAVD88)
(+2 ft overdredge -37 ft NAVD88)
I (+2 ft overdredge -29 ft NAVD88)
Compatibility
JB-20
JB-21
JB-22
JB-23
JB-01
JB-06
JB-17
JB-18
JB-07
JB-08
JB-11A
JB-12
JB-13
Median (mm)
0.23
0.29
0.26
0.24
0.28
0.29
0.25
0.29
0.26
0.29
0.26
0.22
0.29
Median ((�)
2.14
1.78
1.94
2.07
1.85
1.77
1.99
1.80
1.96
1.80
1.93
2.21
1.77
Mean (mm)
0.32
0.33
0.32
0.27
0.34
0.37
0.28
0.36
0.38
0.34
0.37
0.29
0.41
Mean (f)
1.65
1.58
1.64
1.90
1.57
1.42
1.82
1.46
1.38
1.54
1.43
1.77
1.28
Standard
1.55
1.34
1.30
0.91
1.25
1.52
0.91
1.30
1.77
1.37
1.69
1.49
1.67
Deviation (of)
Note: statistics represent the composite average down to specified zone dredge elevation with overdredge.
NCDCM Major Permit Modification #31-20
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Moffatt & Nichol
November 2020

Table 2-9. Jay Bird Shoals composite sediment characteristics of proposed beach fill compared to native
sediment
Sediment
Compatibility
2019 Native
i Global Mean
NCAC
Maximum
Jay Bird Shoals
Composite
Gravel
0.45%
<_ 6%
1.59%
Granular
0.71%
<_ 11%
3.57%
Sand
96.96%
-
90.23%
Fines
1.88%
<_ 7%
4.61%
Carbonate
9.72%
<_ 25%
13.98%
Median (mm)
0.26
-
0.27
Mean (mm)
0.27
-
0.34
Note: characteristics for Jay Bird Shoals composite average down to specified zone dredge elevations
with overdredge.
Table 2-10. Jay Bird Shoals composite sediment statistics of proposed beach fill compared to native
sediment
Note: statistics for Jay Bin
overdredge.
Mimcall ('nlnr
i Sediment
Compatibility
I 2019 Native
Global Mean
Jay Bird Shoals
Composite
Median (mm)
0.26
0.27
Median (4))
1.97
1.90
Mean (mm)
0.27
0.34
Mean (4))
1.90
1.56
Standard
Deviation (6(�)
0.81
1.39
I Shoals composite average down to specified zone d
edge elevations with
Although no documented State or Federal criteria for sediment color exist, the USFWS has
recommended that to minimize effects on sea turtles the wet Munsell color of sediment samples
must be at least a 5. The Jay Bird Shoals vibracore Munsell colors vary from gray (10YR-5/1, 10YR-
6/1) to light gray (10YR-7/1), some grayish brown (10YR-5/2) to light grayish brown (10YR-6/2).
In Appendix 131 there are two colors noted for the vibracore samples. One color was recorded
while the sample was still wet by AVS staff (March 2019). The other color was recorded by
Moffatt & Nichol staff after the sample had been exposed to the sun and allowed to dry for a
month (August 2019).
NCDCM Major Permit Modification #31-20
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Comments received by USFWS, dated November 21, 2019, to the USACE on the use of Jay Bird
Shoals for the 2020/2021 project noted some concerns on color as detailed in the following
quote. "The wet Munsell color of some of the core samples are quite dark (values of 3 or 4). Wet
Munsell color of the borrow material should be similar to the native beach material, and should
typically have a value greater than 5 (regardless of the hue or chroma). It may be that as material
is mixed during sand placement, the color value of the material will be sufficiently light,
...However, it will be important for the applicant to ensure that the material is suitable prior to
placement on the beach." No additional color testing of the Jay Bird Shoals vibracores was
requested by the agencies.
NCDCM Major Permit Modification #31-20
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November 2020
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CENTRAL REACH BORROW AREA
Vibracores in the Central Reach borrow area were obtained by AVS in February and March of
2019. In total, 81 vibracores were analyzed with respect to the NC Technical Standards for
sediment parameters. These vibracores were grouped based on compatibility and combined into
zones. Figure 2-21 gives the location of vibracores and the bathymetry of the proposed borrow
area within Central Reach.
Artificial reef (AR-430) or fish haven as denoted on the navigation chart near the Central Reach
borrow area is approximately 85 ft outside of the 2,000 ft buffer as shown in Figure 2-22. No
impact to AR-430 is expected from dredging operations within the Central Reach borrow area.
Using a multibeam bathymetric survey collected by Geodynamics in 2019 (see Appendix C),
volume calculations indicate approximately 615,000 cy of material exists in the four (4) zones
within the Central Reach borrow area when excluding the 2 ft of overdredge allowance material.
If the contractor chooses, they will have the authorization to excavate 615,000 cy of material
from Central Reach to help meet the need for the approximate 1.667 mcy dredge volume for the
2021/2022 Renourishment Project.
The borrow area was divided into four (4) zones as beach compatible material exists down to
varying elevations, see Table 2-11. The average cut depth, not including overdredge, across Zone
1 is 1.7 ft, Zone 2 is 3.0 ft, Zone 3 is 0.5 ft, and Zone 4 is 2.3 ft. The sediment characteristics and
statistics for the Central Reach borrow area material are presented in Table 2-12 and Table 2-13.
As noted, the sediment characteristics and statistics presented consider a composite average
down to the design elevation for each zone.
Table 2-11. Central Reach Dredge Elevations
Design
+2 ft Overdredge
Deepest Compatible Material
Zone
Elevation (ft,
Allowance (ft,
Elevation (ft, NAVD88)
NAVD88)
NAVD88)
1
Varies between -40 and -43.4
-38.0
-40.0
2
Varies between -41.7 and -49
-39.7
-41.7
3
-39.3
1 -37.3
-39.3
4
Varies between -42 and -46
1 -40.0
-42.0
NCDCM Major Permit Modification #31-20
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Moffatt & Nichol
November 2020
1 :3

r �n
0 5 10 Mlles
I
Legend
Oak Island Sand Search
201912020 Vibracores
Central Reach Borrow Area
Holden beach Gentral Reach
Permitted Barrow Area
Elevation (ft, NAVD88)
Z Hlgh:-34A306
O O-
I& Low _-41.4304
O O O
0 1000 2,000 4000
Feet
1 inch = 2,000 feet
O O O
O
N
W'
y
Zone 1
Notes:
Aerial Imagery: NC One Map 201(5
Zone 2
Coordinate System: State Plane NAD83
O
O O
O
Zone 3
J
Town of Oak Island
-1 0 1 0
0
Permit Modification
zone 4
Borrow Sources:
a f
Central Reach
o
cf� 0
0
Drawn By. Brandon Grant
O
Map Scale: 1 In = 2,000 it
Dredge Elevation
Overdredge Elevation
o
Zone
Volume Icy)
Volume Icy)
(ft, NAVD88)
(ft, NAVD88)
Zone 1
-38
117,010
-40 252,039
Zone 2
-39.7
224,200
-41.7 370,470
0
Zone 3
-37.3
20,160
39.3 86,536
hrl O f f S] t f & n I C h 01
Moffefl8 Mshal
Zone 4
-40 1
253,630
-42 471,774
Total
1
615,000
1,180, 818
4700 Ferrs of N— Rd. sera 300
Rareigh, NC 27809
919-781-4626
www.moNertnichal com
_ -
-
Figure 2-21: Central Reach Borrow Area
NCDCM Major Permit Modification #31-20
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Moffatt & Nichol
November 2020
39

r 34
711
31 Zone 1
0 9.25 B.5 Miley 34
€ i I ry
Legend
O Oak Island Vibracores Zone 2
Central Reach Borrow Area
Zone3 38 37
0 500 1.000 2.000 0
Feet Zone 4
1 inch = 1,000 feet
x Approximately 85 ft
u��r � ZONE
/ outside of AR-430
�2,000 ft buffer
Notes: l `, J
Coordinate System_ State Plane NAD83 1 +f
Town of Oak Island ljr`
Permit Modification f
Borrow Sources:35
bstn 38
Map Scale: I in = 1,000 A .,Fish Haven
r
min 20 ft)
Moffatt & n 1 c h o I
Moffett 8 Nicho!
G ]Oo Falls of Neuse Rd Suite 300
Raleigh, NC 27609
919-781-4626
JWW.melfaltnlcHol. cam
Figure 2-22. Central Reach Borrow Area Proximity to AR-430
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November 2020
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Appendix B2 provides a summary of sediment descriptions including mean grain size, percent
gravel, percent granular, percent fines (<#230), percent carbonate, and Munsell color. The
composite averages shown in Appendix B2 will be different than the composite averages shown
in Table 2-12 and Table 2-13. Appendix B2 shows the composite average for the entire vibracore
sample, while Table 2-12 and Table 2-13 show the composite average for the vibracore down to
the design elevation (with overdredge) for each zone. The borrow area vibracores meet all grain
size criteria for beach placement as established in 15A NCAC 07H.0312 (Table 2-14). The typical
sediment type in Central Reach is medium -grained sand (mean size = 0.32 mm) that is poorly
sorted. This preliminary comparison shows the proposed borrow area sediments to be similar to
the native material (Table 2-15).
Table 2-12. Central Reach sediment characteristics of material proposed for placement on Oak Island
Sediment
compatibility
Zone 1 Dredge
Elevation -38 ft
NAVD88
(+2 ft overdredge -40
ft NAVD88)
Zone 2 Dredge
Elevation
-39.7 ft NAVD88
(+2 ft overdredge-
41.7 ft NAVD88)
Zone 3 Dredge
Elevation
-37.3 ft NAVD88
(+2 ft overdredge -
39.3 ft NAVD88)
Zone 4 Dredge Elevation -40 ft
NAVD88
(+2 ft overdredge -42 ft NAVD88)
Central-07
Central-08
Central-09
Central-10
Central-16
Central-18
Central-19
Central-20
Gravel
1.92%
3.52%
3.54%
3.60%
4.43%
2.45%
4.28%
3.66%
Granular
3.25%
3.93%
7.91%
4.88%
4.86%
4.17%
5.39%
2.81%
Sand
89.31%
86.58%
83.37%
86.96%
86.94%
88.28%
86.47%
86.66%
Fines
5.52%
5.97%
5.17%
4.55%
3.76%
5.10%
3.85%
6.87%
Carbonate
14.00%
7.82%
18.59%
10.33%
24.78%
19.48%
22.85%
14.40%
Mean (mm)
0.24
0.27
0.42
0.35
0.32
0.32
0.28
0.24
Median (mm)
0.18
0.18
0.30
0.23
0.20
0.22
0.17
0.16
Note: characteristics represent the composite average down to specified zone dredge elevation with overdredge.
Table 2-13. Central Reach sediment statistics of material proposed for placement on Oak Island
Zone 1 Dredge
Zone 2 Dredge
Zone 3 Dredge
Elevation -38 ft
Elevation
Elevation
Zone 4 Dredge Elevation -40 ft
Sediment
NAVD88
-39.7 ft NAVD88
-37.3 ft NAVD88
NAVD88
compatibility
(+2 ft overdredge -40
(+2 ft overdredge-
(+2 ft overdredge -
(+2 ft overdredge -42 ft NAVD88)
ft NAVD88)
41.7 ft NAVD88)
39.3 ft NAVD88)
Central-07
Central-08
Central-09
Central-10
Central-16
Central-18
Central-19
Central-20
Mean (mm)
0.24
0.27
0.42
0.35
0.32
0.32
0.28
0.24
Mean (ifl
2.06
1.89
1.24
1.50
1.64
1.66
1.84
2.06
Median (mm)
0.18
0.18
0.30
0.23
0.20
0.22
0.17
0.16
Median (it)
2.46
2.46
1.72
2.13
2.35
2.19
2.54
2.67
Standard
Deviation (of)
1.30
1.51
1.64
1.5
1.62
1.52
1.66
1.54
Note: statistics represent the composite average down to specified zone dredge elevation with overdredge.
NCDCM Major Permit Modification #31-20
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Moffatt & Nichol
November 2020
41

Table 2-14. Central Reach composite sediment characteristics of proposed beach fill compared to native
sediment
Sediment
Compatibility
2019 Native
Global Mean
NCAC
Maximum
Central Reach
Composite
Gravel
0.45%
<_ 6%
3.40%
Granular
0.71%
<_ 11%
4.97%
Sand
96.96%
-
86.53%
Fines
1.88%
<_ 7%
5.09%
Carbonate
9.72%
<_ 25%
16.17%
Median (mm)
0.26
-
0.22
Mean (mm)
0.27
-
0.32
Note: characteristics for Central Reach composite average down to specified zone dredge elevations with
overdredge.
Table 2-15. Central Reach composite sediment statistics of proposed beach fill compared to native
sediment
Sediment
Compatibility
2019 Native
Global Mean
Central Reach
Composite
Median (mm)
0.26
0.22
Median (4))
1.97
2.22
Mean (mm)
0.27
0.32
Mean (4))
1.9
1.65
Standard
Deviation (64))
0.81
1.56
Note: characteristics for Central Reach composite average down to specified zone dredge elevations with
overdredge.
MiinfPll ('nlnr
Although no documented State or Federal criteria for sediment color exist, the USFWS has
recommended that to minimize effects on sea turtles the wet Munsell color of sediment samples
must be at least a 5. As mentioned previously, the vibracores were collected in February and
March of 2019, after undergoing sieve analysis, the vibracores were then transferred to the Town
in July of 2019. In Appendix B2 there are two colors noted for the vibracore samples. One color
was recorded while the sample was still wet by AVS staff (March 2019). The other color was
recorded by Moffatt & Nichol staff after the sample had been exposed to the sun and allowed to
dry for a month (August 2019). All Central Reach vibracore Munsell colors recorded were gray
(10YR-5/1, 10YR-6/1). There was one vibracore (Central-10) where dry readings for some samples
NCDCM Major Permit Modification #31-20 Moffatt & Nichol
2021/2022 Oak Island Renourishment Project November 2020
42

were not able to be obtained, due to the vibracore section being damaged in transit. However, it
is expected that these samples which recorded as a wet 10YR-3/1 would lighten since samples
one (1) and two (2), which also recorded as a wet 10YR-3/1, lightened to a 10YR-6/1 after being
left in the sun for a month. As the final dredging and overdredge elevations for the Central Reach
borrow area were being optimized, Moffatt & Nichol staff had to collect dry color readings for
some vibracore depths which were not considered previously. This explains the couple of
samples that have a March 2020 dry color recording noted in Appendix B2.
After receiving clarification from USFWS that the Munsell color recorded from the samples which
had been dried for a month did not meet the recommendation as they were not wet, M&N staff
took the dried samples and wetted them to then record the Munsell color. These results can be
found in Appendix B2. Wetting of the dried samples did not take place for every vibracore, as
many vibracores had similar Munsell color classifications. For example, vibracores in the same
dredge zone that had same color transitions, i.e. AVS recorded wet sample as 10YR-3/1 and MN
recorded dry sample as 10YR-6/1 were only tested on one vibracore in the zone that exhibited
this behavior. The result from the sample tested was assumed to be applied to the other
vibracore in the dredge zone with the same color classifications. Some samples once wetted, do
not meet the recommendation of at least a 5. Most of the dried samples once wetted ended up
one shade lighter, some returning back to the original wet Munsell color classified by AVS staff.
Some samples appeared to fall between two Munsell color classifications i.e. between 10YR-3/1
and 10YR-4/1. Figure 2-23 below shows a comparison of a wet and dry sample taken from the
first 6 inches of vibracore Central-08. In this figure the right sample is dry, and the color was
recorded as a 10YR-6/1; the left sample is wet, and the color was recorded as a 10YR-5/1.
Figure 2-23. Central-08 wet versus dry sample
NCDCM Major Permit Modification #31-20
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November 2020
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Two studies by the USACE have been performed to investigate sediment color changes over time
in regard to beach nourishment efforts. One study from 2013, titled "Dauphin Island Pilot Study:
Color Change of Black Warrior -Tombigbee Waterway (BWT) Sand Placed Along the Shoreline of
Eastern Dauphin Island, Alabama" found that "over the course of a year color change for river
sand placement went from a wet Munsell color predominately light yellowish brown to a light
gray and a dry Munsell color of predominately pale brown to white." This equates to an average
Munsell value increase of 1.43 within 12 months. In this study the color changes could not be
attributed to any particular mechanism and likely resulted from a combination of mixing with
native sand, sediment transport, photochemical bleaching, oxidation, and/or alteration of iron
oxide or other sediment coatings.
The second study completed by the USACE Engineer Research and Development Center in 2018
titled 'Investigating Sediment Color Change Dynamics to Promote Beneficial Use Applications'
focuses on "evaluating factors driving sediment color change with an emphasis on chemical
processes". The study acknowledges that 'Although practitioners report substantial sediment
color change after beneficial use project placement, the sediment color changes process and
associated underlying mechanisms remain poorly documented." Further that, "Reported color
changes likely result from a combination of physical and chemical processes including abrasion,
sediment transport (e.g., winnowing of darker, fine materials), sediment mixing, removal of
sediment particle coatings, oxidation of decomposable organic matter, and photochemical
bleaching." The study found that "Removing carbonates, organic matter, and iron oxide coatings
increased the Munsell value across all sediments examined by an average of 1.0 Munsell value.
It also found that mixing dark fine silt (Munsell value <3) with another silt (Munsell value 4.2)
resulted in Munsell value increases of 1-2 units. Finally, the study concluded that bleached
sediments experienced color rate increases of 0.3-0.5 Munsell value. Sediment color concerns
remain poorly defined but "A variety of recent (Maglio et al. 2015) and ongoing research reports
the removal of dark sediments during the dredging and beneficial placement process."
It is important to note that vibracores from across the Central Reach borrow area will be dredged
and mixed together at same time, some vibracores having lighter color and some having darker
color. As a reminder, all the vibracores within the Central Reach Borrow Area meet the sediment
compatibility requirements as identified in 15A NCAC 07H.0312. Ultimately, the material placed
on the beach will be closely monitored for color (and other sediment characteristics) to ensure it
remains compatible and to the satisfaction of the agencies.
NCDCM Major Permit Modification #31-20
2021/2022 Oak Island Renourishment Project
Moffatt & Nichol
November 2020
44

2.4 Jay Bird Shoals Borrow Area Modeling
To investigate the potential effects of dredging the Jay Bird Shoals borrow area on tidal currents,
nearshore waves, and sediment transport along the adjacent shoreline, the existing model
bathymetry was modified to reflect the proposed after -dredge conditions. Dredging elevations
were increased from the borrow area template that was permitted for the 2020/2021
Renourishment Project (Template 2). These elevation increases will provide the additional
volume necessary for the proposed 2021 /2022 Renourishment Project (Template 1). The
increased dredging elevations also provide additional flexibility and efficiencies for dredge
equipment based on the bidding and construction history from the 2020/2021 project. The
footprint of the proposed borrow area is the same as was previously permitted (304 acres), but
the proposed dredge elevations for this permit modification are deeper as shown in Table 2-16.
Table 2-16. Template Dredging Elevations
Template 2
Template 1
Previously
Zone
Proposed Elevation
Permitted Elevation
(ft-NAVD88)
(ft-NAVD88)
1
-28.0
-26.0
2
-37.0
-31.0
3
-29.0
-27.0
The maximum dredging scenario was considered for both templates, i.e. assuming to remove all
the available material identified as beach compatible, 4.67 mcy for Template 1 and 2.95 mcy for
Template 2. This assumption is conservative since, as discussed earlier, the dredge will not
remove all this material. Thus, the results from the Delft3D model are believed to be a
conservative overestimate of the potential effects on the tidal current and wave climates.
The tidal current model results indicate that for the proposed Template 1 scenario, effects on
residual tidal currents would be localized and small, similar to the previously permitted Template
2 scenario. This implies there would be no significant effects on sediment transport processes
associated with tidal currents due to implementing the changes in elevations for Template 1.
Figure 2-24 shows the effects of the proposed template (Template 1) and previously permitted
template (Template 2) on residual tidal currents over a spring -neap tidal cycle.
NCDCM Major Permit Modification #31-20 Moffatt & Nichol
2021/2022 Oak Island Renourishment Project November 2020
45

17-
16
7 16 -
r /
5 — J
604 695 596 607 698 599 700 701 702 703
x coordinate (km) a
-025 -0.2 -0.15 - 1 -005 0 0.05 0.1 ❑.15 62 0.25
Residual Currents - iTemplale 1 - Exlsdng) (fVs,
17-
r 15
a — J
694 695 596 097 698 699 700 701 702 703
x _d, pate (Mn)
-0A -12 -015 -0.1 -005 9 O.W 0.1 9.15 02 0.25
Residual Currents - (Template 2 - Existing) (1 s!
Figure 2-24. After -dredge bathymetry effects on residual tidal currents over a spring neap tidal cycle
The wave transformation model results for the 2004 — 2018 average annual offshore wave
climates show that both after -dredge bathymetry templates within Jay Bird Shoals could result
in a slight redistribution of wave energy along the Caswell Beach shoreline during moderate to
severe storm events.
Thus, sediment transport analyses were also completed, to observe if the changes to wave
heights and wave directions would affect longshore transport. The sediment transport results for
both after -dredge bathymetry templates show that the wave -induced longshore sediment
transports could be reduced leeward of the borrow area but could potentially increase on
shoreline segments both east and west sides of the borrow area. The net effect of these changes
could result in localized adjustments in shoreline erosion/accretion. Potential effects on
shoreline erosion in other areas are minimal, although some areas may experience increased
shoreline accretion. Based on the model results of the longshore sediment transport gradients
as presented in Figure 2-25, most of the potential increases in shoreline erosion would be limited
to discrete portions of Caswell Beach (between survey transects 37+00 — 60+00 and 150+00 —
185+00). Generally, both templates show results close to existing conditions, with some areas
showing transport rates above and below existing conditions.
NCDCM Major Permit Modification #31-20 Moffatt & Nichol
2021/2022 Oak Island Renourishment Project November 2020
46

100
80
60
T
40
c
v
20
L7
`o
u 0
c
C
-20
N
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^1
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.�I- IP 1:1 �Ipl xt� I MI I I I I
���...�........r........�...... 4_____________ __ ____________
• + SurveyTransects ...^"••."' '�."•..."--------
Jay Bird Shoal borrow Site i -
�
—Transport Gradient - Existing
_--L----------------J--------
Transport Gradient - Aker -Dredge Template 1
—Transport Gradient - Aker -Dredge Template 2
1001 1 i i i i
691000
692000 693000 69400D 695000 696000 59700D 69,3000 699000 700000 701000
Easting - NC State Plan (m)
Figure 2-25. Wave induced longshore sediment transport gradients along Caswell Beach shoreline
Considering the results, there is no strong evidence that the proposed Template 1 would cause
significant impacts in comparison with previously permitted Template 2, especially given that this
is not a morphological model. The sediment transport inside the surf zone is greatly influenced
by the imposed model bathymetry. Thus, the results only represent the bathymetric condition
constructed based on the available data sources. Therefore, Template 1 is proposed to complete
the 2021/2022 Renourishment Project. Given the dredging process inefficiencies previously
discussed, Template 1 will allow for efficient and effective use of additional beach compatible
sediment.
2.5 Survey Data Collection
15A NCAC 07H.0312(2) specifies 100 percent multibeam and sidescan sonar coverage of the
borrow area and geophysical imaging of the seafloor on survey grids with line spacing not to
exceed 1,000 feet. Geodynamics completed a survey of the Central Reach borrow area in June
2019. Data collected included magnetometer, sidescan sonar, sub -bottom, and multibeam,
survey data collection methods and other information are detailed in Appendix C.
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As a note all survey data for the Jay Bird Shoals borrow area was provided in the 2020/2021
Renourishment Project application and is also available in Appendix C.
The results of the magnetometer data were reviewed by Tidewater Atlantic Research, Inc. to
determine the presence and proper avoidance of any cultural resources. This is discussed further
in Chapter 3.0 Cultural Resources.
The sidescan sonar mosaic data in Figure 2-26 illustrates the relative differences in bottom type
throughout the Central Reach borrow area. There are observed distinct sand ridges with a rather
homogenous bottom type. The sub -bottom data was collected on grid line spacing of 1,000 ft,
see Figure 2-27 below. Figure 2-28 shows a 3D diagram illustrating the sediment horizons from
the collected sub -bottom data. The dark orange line represents the extents of the 'shallow'
reflector and the lime green line represents the 'base' reflector or deepest, continuous reflector.
The multibeam data collected, shown in Figure 2-29 below, was used to determine the total
dredge volume for the borrow area.
Lenq Bey _
Oak Island Geophysloal: Phase 2
C.Mr.1 Reach MSES Survey
Legend
o swrr e.xa.
tw.r.i Rein exa.c.nn
YR.MIY• DlCNMI� 1.1
hipn -te
lll�w. ss
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31
5 5h
29
33
34
-DISCHARGE ZONE
{see note Z} 37
35 Ob stn
35 Fish Ha
(au[mi
Figure 2-26. Sidescan Sonar Survey Coverage of the Central Reach Borrow Area
NCDCM Major Permit Modification #31-20
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c�»
?y e 31
s.... 255'.1..250 "M Feel ,.
Dak Island Geophysical: Phase 2 E
Ceetnr Reach S,bWWu— Profit's
Legend
$oh -bottom Rmi�ellee
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O-DISCHARGE ZC
(see r7CJt .7)
3
35
Figure 2-27. Sub -bottom Grid Survey Coverage
Figure 2-28. 3-D View of Sub -bottom Grid
NCDCM Major Permit Modification #31-20
2021/2022 Oak Island Renourishment Project
�IAJ
37 =
F
Qbstn
Fish Have
{auth miry
Moffatt & Nichol
November 2020
49

Legend
l� Survey EaV•n�
—tncaDmeB
Central Reach
a�000 29 aasoo3 zz�o zz,009a z,sz000 asao zz,�oo
�,. 33
�
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Central Areas
3]
2, IeC
Oak Island Geophysical: Phase 2� 34
Central Reach MBES Survey S Sh nii -
a 39 - -39
-DISCHARGE ZONE
(see note Z) 3�
q 35 ,_F _
Obstn p
2 9 Fish Ha
35 {auth mr 3
q ' d8 AD q
b -0a r 4
7
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33
Figure 2-29. Multibeam Survey Coverage of the Central Reach Borrow Area
3.0 CULTURAL RESOURCES
The NC State Historic Preservation Office was consulted prior to offshore geotechnical
investigations to ensure vibracores collected would not interfere with any known cultural
resources. Tidewater Atlantic Research, Inc. conducted an evaluation of all 167 anomalies
resulting from the 2019 magnetometer and sonar survey (Appendix Q. Results identified all
anomalies were generated by modern debris such as tires, chain/cable, and small objects such as
traps; of which 27 of the 167 anomalies fall within the 180-acre proposed Central Reach borrow
area. No buffers were recommended for the anomalies identified.
As a note the cultural resources investigation for the Jay Bird Shoals borrow area was provided
in the 2020/2021 Renourishment Project application.
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4.0 PROPOSED CONSERVATION MEASURES
The following conservation measures will be implemented by the Town and contractor to avoid
or minimize potential impacts on the affected environment and federally managed species and
critical habitat that may occur within the dredging and pipeline footprint, beach placement, and
staging areas. In addition to those listed below, the Town is committed to Reasonable Prudent
Measures and Terms and Conditions listed under sand placement from beach nourishment
activities in the USFWS Statewide Programmatic Biological Opinion for Sand Placement Projects
(USFWS 2017).
Construction Schedule
• All sand placement, dredging, and associated construction activities would adhere to a 16
November to 30 April environmental window. Adherence to the environmental window
would minimize potential impacts by avoiding the following periods of critical biological
activity:
o Sand placement and dredging operations would avoid most of the peak
recruitment period [March -September (Hackney et al. 1996)] for surf zone fishes
in NC.
o Dredging operations near the Cape Fear River inlet would avoid peak larval ingress
periods [May -June (Hettler and Chester 1990)] for estuarine -dependent fishes and
invertebrates, thereby reducing rates of larval entrainment during dredging
operations.
o Sand placement operations would avoid peak spring benthic invertebrate
recruitment periods in NC [May through September (Hackney et al. 1996, Diaz
1980, Reilly and Bellis 1978)]; thereby reducing the duration of direct impacts on
intertidal beach benthic infaunal communities that constitute the prey -base for
demersal surf zone fishes.
o Borrow area dredging operations would avoid peak spring benthic invertebrate
recruitment periods in NC [May through September (Hackney et al. 1996, Diaz
1980, Reilly and Bellis 1978)]; thereby reducing the duration of direct impacts on
subtidal soft bottom benthic invertebrate communities that constitute the prey -
base for nearshore demersal fishes.
Construction Methods
• Good Engineering Practices and Best Management Practices would be applied to all sand
placement and dredging activities.
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Sand Placement
• Pipelines will be equipped with spreaders to reduce effluent discharge velocities during
sand -slurry placement. As appropriate, temporary longitudinal sand dikes would be used
to contain and direct the horizontal flow of the discharged sand -slurry along the beach.
These measures would maximize sediment retention within the designated placement
area, thereby minimizing potential surf zone turbidity effects.
• Sand delivery pipelines will be routinely inspected for pressurized leaks and any leaks that
are found would be immediately repaired.
• All sediment and erosion control measures shall be equal to or exceed the requirements
of the NC Sediment and Erosion Control Manual.
• Construction equipment and activities will not be near the bare sand area adjacent to the
inlet where many protected avian species forage and nest. The Town conducted three
years of shorebird monitoring to analyze habitat use within the inlet complex (See
Shorebird Monitoring Report in Appendix F).
Dredging
• A hydrographic survey covering the entire area where the dredge is expected to operate
will be conducted before and after the dredging event.
• The contractor will be required to comply with requirements stated in the 2020 South
Atlantic Regional Biological Opinion (SARBO 2020).
• Operation and Dredging Endangered Species System (ODESS) — the dredge should be
equipped with a tablet running ODESS software to track and document the presence of
sea turtle, sturgeon, and marine mammal species during dredge operations. The system
must be connected to the internet and be a stand-alone system, as well as have the USACE
ODESS data collection and reporting software (ODESS Field Collector Tool).
• Dredging contractors will be required to maintain spill control plans and waste
management plans for all dredging fleet equipment.
Sediment Compatibility
• All material placed on the beach and in associated dune systems would consist of beach
compatible sand that meets NC Technical Standards for Beach Fill Projects (15A NCAC
07H.0312). Monitoring of fill material at the pipeline outfall will be conducted daily by the
contractor throughout sand placement operations. If dredging operations encounter non -
compatible material, the contractor will cease operations and immediately contact the
USACE Wilmington District Regulatory Branch and NCDCM to determine the appropriate
course of corrective action. The use of only sand that is compatible with the native beach
would reduce the extent and duration of direct impacts on intertidal beach benthic
infaunal communities and sea turtle nesting.
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• Should dredging operations encounter incompatible sand, the dredge operator will cease
operations immediately and contact NCDCM.
Post -Construction Monitoring
• The NCDCM and USACE hosted a meeting in January 2020 to discuss the 2020/2021
Renourishment Project with neighboring stakeholders (Caswell Beach and the Village of
Bald Head Island) in which a monitoring plan was discussed associated with use of the Jay
Bird Shoals borrow area. As agreed by all parties, the Town will monitor the Caswell Beach
shoreline annually for three (3) years post -construction to investigate any potential
shoreline change effects. Further details on the post -construction monitoring procedure
can be found in Appendix G. Figure 4-1 below shows the extents of the proposed
monitoring. For comparison, it also shows the extents of Bald Head Island's current
monitoring efforts on Caswell Beach.
• The Town will monitor the permitted dredged area, and sediment accumulation (infill)
rates within Jay Bird Shoals, including all areas located 500 feet outside of the dredged
area, for a period of three years after dredging. The first survey should be completed
within 30 days upon completion of dredging.
Reporting
• The Town will notify the state and federal resource agencies in the event the contractor
is able to remove the marine debris intact. Any marine debris encountered during
dredging operations will be disposed of in an appropriate location. If any submerged
cultural resources are encountered during dredge operations, the contractor will cease
dredging immediately.
• All shoreline monitoring reports will be submitted to the State and Federal resource
agencies by December 31 of each year.
Threatened and Endangered Species
• Based on recommendations by USFWS and NCWRC, the dune slope design was adjusted
to 4H:1V on the oceanfront side to avoid sea turtles and hatchlings becoming entrapped
on the backside of the dune.
• West Indian Manatee Protection — the contractor will implement the USFWS's Manatee
Guidelines found at http://saw-reg.usace.army.mil/ESA/manatee guidelines.pdf.
• Sea Turtle Incidental Data Form - If a sea turtle or its remains are found during dredging,
a Sea Turtle Incidental Data Form will be completed and submitted to the ODESS database
as soon as possible (not to exceed 6 hours after the incident).
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• Sturgeon Incidental Data Form - If a sturgeon or its remains are found during dredging, a
Sturgeon Incidental Data Form must be completed and submitted to the ODESS database
as soon as possible (not to exceed 6 hours after the incident).
• During dredging, observers approved by the National Oceanic and Atmospheric
Administration — Fisheries for sea turtles, sturgeon, and whale will be aboard to monitor
for presence of the species.
• To protect NC Division of Marine Fisheries (DMF) Artificial Reef 425, a 2,000 ft radius will
be maintained in all directions from a center point location of 33°53.048' N,-78006.525'
W.
• To protect NC DMF Artificial Reef 430, a 2,000 ft radius will be maintained in all directions
from a center point location of 33°52.1898' N,-78°10.0002' W.
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FvA RWRY-
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2255000 2260000 2265000 2270000 2275000 2280000 2285000 2290000 2295000 2300000 2305000
Legend
Monitoring Transacts
Bald Head Island Jay Bird Shoals Borrow Area
Oak Island Jay Bird Shoals Borrow Area
0 2,500 5.000 10,000 15,000
Feet
Figure 4-1. Post -Construction Monitoring of Caswell Beach
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5.0 COMPLIANCE WITH BRUNSWICK COUNTY AND CAMA LAND USE PLAN
The proposed project is consistent with the approved CAMA Land Use Plans for Brunswick County
and the Town. The project property is within the planning jurisdiction of Brunswick County and
the Town and is classified "Developed" by the CAMA Land Use Plan.
6.0 COMPLIANCE WITH THE NC ENVIRONMENTAL POLICY ACT
In accordance with § 113A-12(6), NCDCM has determined prior to the application that review of
this project under the State Environmental Policy Act is not be required.
The NC Division of Water Resources will be provided a full copy of the permit application
requesting a 401 Water Quality Certification.
7.0 CONSTRUCTION EASEMENTS
The Town is in the process of obtaining easements for the oceanfront properties within the
project area. The Town has provided a letter of intent to obtain these easements prior to
construction (Appendix H).
8.0 COMPLIANCE WITH DWR WATER QUALITY CERTIFICATION
In accordance with 15A NCAC 07H.0208(a)(2)(B), a scoping meeting occurred in lieu of a pre -filing
meeting request. The scoping meeting was held virtually (via WebEx) on October 23, 2020. A
summary of the scoping meeting is provided in Appendix I.
As requested by NCDCM after the scoping meeting, several supplemental profiles which display
historical surveys overlain with the construction template are provided in Appendix J.
The project proponent hereby certifies that all information contained herein is true, accurate,
and complete to the best of my knowledge and belief.
The project proponent hereby requests that the certifying authority review and take action on
this CWA 401 certification request within the applicable reasonable period of time.
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9.0 REFERENCES
Berkowtiz, J.F., VanZomeren, C.M., and Priestas, A.M. 2018. Investigation Sediment Color Change
Dynamics to Promote Beneficial Use Applications. The Proceedings of 2018 Dredging Summit and
Expo.
Diaz, H. 1980. The mole crab Emerita talpoida (say): A case study of changing life history pattern.
Ecological Monographs 50(4):437-456.
Hackney, C.T., M.H. Posey, S.W. Ross, and A.R. Norris. 1996. A review and synthesis of data on
surf zone fishes and invertebrates in the South Atlantic Bight and the potential impacts from
beach renourishment. UNC-Wilmington, Wilmington, NC, 111 pp. Prepared for: Wilmington
District, US Army Corps of Engineers.
Hales, L.Z. 1995. Dredge Plant Equipment and Systems Processes; Summary Report for Technical
Area 3. Technical Report DRP-95-10, United States Army Corps of Engineers
Hettler, W.F. and A.J. Chester. 1990. Temporal distribution of ichthyoplankton near Beaufort
Inlet, North Carolina. Marine Ecology Progress Series 68: 157-168.
Maglio, C., Ousley, J.D., and Coor, J.L. 2015. "Sediment engineering thru dredging and with nature
— fate of fines in dredging and placement process." The Proceedings of Coastal Sediments 2015,
San Diego, CA.
Reilly, F.J. Jr., and V.J. Bellis. 1978. A study of the ecological impact of beach nourishment with
dredged materials on the intertidal zone. Institute for Coastal and Marine Resources, Technical
Report No. 4.
Town of Oak Island, 2009. CAMA Land Use Plan Update. Adopted by the Oak Island Town Council
8 Feb 2017.
U.S. Army Corps of Engineers Wilmington District. 2010. Archaeological and Hardbottom Surveys
of Offshore Borrow Areas with Jay Bird and Frying Pan Shoals, Brunswick Beaches, Brunswick
County, North Carolina. 89 pages.
U.S. Army Corps of Engineers Mobile District. 2013. "Sand color change monitoring of Black
Warrior —Tombigbee waterway (BWT) sand placed alongthe shoreline of eastern Dauphin Island,
Alabama."
U.S. Fish and Wildlife Service. 2017. North Carolina Coastal Beach Sand Placement Statewide
Programmatic Biological Opinion. Website: https://www.fws.gov/raleigh/pdfs/spbo.pdf.
NCDCM Major Permit Modification #31-20
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VERSAR, 2003. Effects of dredged material beach disposal on surf zone and nearshore fish and
benthic resources on Bald Head Island, Caswell Beach, Oak Island, and Holden Beach, North
Carolina: interim study findings. Prepared for USACE, Wilmington District, NC; -prepared by
Versar Inc, Columbia, MD, Vol I, 54 pp.
Willson, K., Thomson, G., Briggs, T.R., Elko, N., & Miller, J. (2017) Beach Nourishment Profile
Equilibration: What to Expect After Sand is Placed on the Beach. ASBPA Science & Technology
Committee.
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3 4 5 6
I
OAK ISLAND RENOURISHMENT PROJECT 2021/2022
3
OAK ISLAND, NORTH CAROLINA
RECEIVED
NOV 2 5 2020
DCM WILMINGTON, NC
PITT HYDE
BEAUFORT
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<L P
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FEAR P
PROJECT AREA
VICINITY MAP
NTS
TOWN OF OAK ISLAND
4601 E. OAK ISLAND DRIVE
OAK ISLAND, NC 28465
BRUNSWICKCOUNTY
PROPOSED
SEE A
SHALLOTTE PREA PROJECT
MAP ON SHEET G-DD4
VARNAMTOWN , W�
e°
«i SOUTHPORT
SUNSET BEACH HOLDEN BEACH LOCKN'OODS OAK ISLAND
SHALLOTTE FOLLY INLET
INLET CASWELL BEAU
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BEACH
iUBB3INLET PROPOSED CENTRAL
REACH BORROWAREA, i BALDHEADISLAND
SEE PROJECT MAP ON
SHEET G-004
PROPOSED JAY BIRO
SHOALS BORROW AREA.
SEE PROJECT MAP ON
SHEET G-004
ATLANTIC OCEAN
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a
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Sheet n
LOCATION MAP FOR PERMITTING Rere'enmNo
NTS ISSUED: 2020-11-18 G-001
NOT TO BE USED FOR CONSTRUCTION D
INDEX. 1 OF 08
5 6

INDEX OF DRAWINGS
INDEX NO. SHEET NO. 1 SHEET TITLE
GENERAL
1
G-001
COVER SHEET
2
G-002
DRAWING INDEX AND GENERAL NOTES
3
G-003
ABBREVIATIONS B LEGEND
4
G-004
PROJECT MAP
5
G-005
STAGING AND SURVEY CONTROL
CIVIL
6
C-100
KEY PLAN
7
C-101
SITE PLAN i OF 18
8
C-102
SITE PLAN 2 OF 18
9
C-103
SITE PLAN 3 OF 18
10
C-104
SITE PLAN 4 OF 18
11
C-105
SITE PLAN 5 OF 18
12
C-106
SITE PLAN 6 OF 18
13
C-107
SITE PLAN 7 OF 18
14
C-10B
SITE PLAN 8OF 18
15
C-109
SITE PLAN 9OF 18
16
C-110
SITE PLAN 10 OF 18
17
C-111
SITE PLAN 11 OF 18
18
C-112
SITE PLAN 12 OF 18
19
C-113
SITE PLAN 13 OF 18
20
C-114
SITE PLAN 14 OF 18
21
C-115
SITE PLAN 15 OF 18
22
C-116
SITE PLAN 16 OF 18
23
C-117
SITE PLAN 17 OF 18
24
C-118
SITE PLAN IS OF 18
25
C-119
JAY BIRD SHOALS BORROWAREA
26
C-120
CENTRAL REACH BORROWAREA
27
C-301
BORROW AREA CROSS SECTIONS
28
C-302
BORROW AREA CROSS SECTIONS
29
C-303
TYPICAL CROSS SECTIONS
GENERAL NOTES:
1, ALL BEACH FILL, DREDGING AND PLANTING WORK SHALL CONFORM TO THE
REQUIREMENTS OF THESE PLANS AND SPECIFICATIONS.
2. THE CONTRACTOR SHALL PLACE THE PERMIT PLACARDS ON THE JOB SITE
AND SHALL COMPLY WITH ALL TERMS OF THE PERMITS PERTAINING
TO THE PERFORMANCE OF THE WORK. SEETHE TECHNICAL SPECIFICATIONS.
3, CONTRACTOR SHALL VERIFY ALL DIMENSIONS AND EXISTING CONDITIONS
BEFORE STARTING WORK. NOTIFY OWNER OF DISCREPANCIES.
4. ALL SAFETY REGULATIONS ARE TO BE STRICTLY FOLLOWED. METHODS OF
CONSTRUCTION AND ERECTION OF STRUCTURAL MATERIAL ARE THE
CONTRACTORS RESPONSIBILITY.
5. THE CONTRACTOR SHALL, ON A DAILY BASIS, REMOVE FROM THE SITE ANY
EXCAVATED MATERIAL OR DEBRIS. DISPOSAL OF THE MATERIALS IS THE
RESPONSIBILITY OF THE CONTRACTOR. ALL DEBRIS SHALL BE DISPOSED
OF IN A PERMITTED LANDFILL.
6. THESE PLANS ARE INCOMPLETE WITHOUT THE PROJECT TECHNICAL
SPECIFICATIONS. IF THERE ARE CONFLICTS BETWEEN THE PLANS AND
SPECIFICATIONS, THE CONTRACTOR SHALL ALERT THE OWNER AND
ENGINEER. THE TECHNICAL SPECIFICATIONS SHALL TAKE PRECEDENCE.
7, THE STAGING AND ACCESS AREAS SHOWN ON G-005 ARE OWNED BY THE TOWN OF
OAK ISLAND. COORDINATION WITH THE TOWN MANAGER SHALL BE REQUIRED BEFORE
USE. FOR THE STAGING AND ACCESS AREAS, THE POINT OF CONTACT IS'.
MR. DAVID KELLY
TOWN MANAGER
TOWN OF OAK ISLAND
4601 EAST OAK ISLAND DRIVE
OAK ISLAND, NC 28465
[phone]
dkelly@cloak-islandnc. us
8. STAGING AND ACCESS AREAS SHALL BE MAINTAINED BY THE CONTRACTOR. STAGING AND
ACCESS AREAS SHALL BE CLEARED OF DEBRIS AND CONTRACTOR INSTALLED AMENITIES
AT THE COMPLETION AND ACCEPTANCE OF WORK IN THE AREA. THE CONTRACTOR SHALL
RESTORE THE STAGING AND ACCESS AREAS TO THEIR ORIGINAL CONDITION AFTER WORK
IN THE AREA IS COMPLETE. THIS WORK INCLUDES REPLACEMENT OF FENCING, SIGNS,
SAND FENCE, BEACH VEGETATION, WALKWAYS, DUNES, DUNE VEGETATION, PARKING
FACILITIES, PAVED AREAS AND OTHER MISCELLANEOUS ITEMS. ALL REPLACEMENT
MATERIALS SHALL BE APPROVED BY THE OWNER BEFORE INSTALLATION.
9. UNLESS OTHERWISE APPROVED BY THE OWNER, EXCESS EQUIPMENT MAY ONLY
BE STORED IN APPROVED STORAGEISTAGING AREAS OR TEMPORARY AREAS
IN THE IMMEDIATE VICINITY OF THE BEACHFILL PLACEMENT SITE THE OWNER
RESERVES THE RIGHT TO LIMIT SUCH AREAS AS DEEMED NECESSARY. OPERATION
OF GRADING AND OTHER CONSTRUCTION EQUIPMENT WILL NOT BE PERMITTED
OUTSIDE THE WORK AREA LIMITS EXCEPT FOR INGRESS AND EGRESS OF THE
SITE AT APPROVED LOCATIONS. THE STACKING OF DISCHARGE PIPES IN LAYERS
EXCEEDING TWO PIPES HIGH SHALL BE PROHIBITED IN ANY OF THE STORAGE
OR STAGING AREAS INCLUDING THE TEMPORARY AREAS.
10. ANY EXISTING SIGNS,FENCES, OR OTHER STRUCTURES WITHIN THE WORK LIMITS
SHALL BE PROTECTED AND/OR REMOVED AND LATER REPLACED BY THE
CONTRACTOR AS DIRECTED.
11. THE PLANE COORDINATES AND BEARINGS SHOWN FOR THE DREDGING SURVEYS ARE
BASED ON THE NORTH CAROLINA STATE PLANE COORDINATE SYSTEM, NORTH AMERICAN
DATUM 83 (NAD 83).
12. ALL ELEVATIONS SHOWN ON THE DREDGING DRAWINGS ARE REFERENCED
TO NORTH AMERICAN VERTICAL DATUM 1988 (NAVD 88).
13. THE BATHYMETRY PRESENTED ON THE DREDGING PLANS IS BASED ON A SURVEY
COMPLETED IN JUNE 2019 BY GEODYNAMICS AND CAN ONLY BE CONSIDERED AS
INDICATING THE CONDITIONS AT THAT TIME.
14. THE BATHYMETRY/FOPOGRAPHY PRESENTED ON THE BEACH FILL PLANS AND SECTIONS IS BASED
ON A SURVEY COMPLETED IN AUGUST 2020 BY TI COASTAL AND CAN ONLY BE CONSIDERED AS
INDICATING THE CONDITIONS AT THAT TIME.
15, THE AERIAL IMAGERY PRESENTED ON THE BEACH FILL PLANS IS A NOAAAERIAL FROM AUGUST
4, 2020AND CAN ONLY BE CONSIDERED AS INDICATING THE CONDITIONS AT THE TIME.
16, THE MEAN HIGH WATER ELEVATION AND MEAN LOW WATER ELEVATION SHOWN ON THE BEACH
FILL DRAWINGS AND BELOW ARE BASED ON NOAA TIDAL DATUMS AT THE OAK ISLAND, ATLANTIC
OCEAN, NC STATION.
MEAN HIGH WATER (MEW) 1.8
B'
NAVD 88
0 6'
MEAN TIDE LEVEL (MTL) 0.6
2 9'
MEAN LOWER WATER (MEW) -2.9
BID QUANTITIES
1. THE FOLLOWING ESTIMATES OF SAND QUANTITIES REQUIRED FOR THE PROJECT ARE'.
BEACH RESTORATION 1,282,000 Cy
2. THE FOLLOWING ESTIMATES OF PLANTING QUANTITIES REQUIRED FOR THE PROJECT ARE'.
DUNE PLANTING
DREDGING
110,600 SY
I. ALL DREDGING SHALL BE PERFORMED WITHIN THE LIMITS OF THE PERMITTED
DREDGING AREA AS SHOWN IN THE DRAWINGS.
2. PIPELINE CORRIDOR SHALL BE DELINEATED WITH BUOYS BY THE CONTRACTOR IN THE
PRESENCE OF THE OWNER BEFORE PLACEMENT.
3. A POST -DREDGE SURVEY OF THE BORROW AREA SHALL BE COMPLETED BY AN
INDEPENDENT PROFESSIONAL LAND SURVEYOR REGISTERED IN THE STATE OF NORTH
CAROLINA, COORDINATED AND PAID FOR BY THE CONTRACTOR TO STANDARDS OUTLINED IN
THE TECHNICAL SPECIFICATIONS.
BEACH FILL
1. ALL SAND EXCAVATED FROM THE BORROW AREAS SHALL BE TRANSPORTED TO, AND
DEPOSITED ON, THE BEACH BETWEEN THE LINES, GRADES, AND CROSS -SECTIONS SHOWN ON
THE DRAWINGS.
2. AFTER NOTIFICATION BY THE CONTRACTOR OF THEIR INTENT TO COMMENCE DREDGING AND
SAND PLACEMENT, A CURRENT BEACH SURVEY WILL BE PERFORMED BY THE OWNER. THE
CONTRACTOR SHALL NOTIFY THE OWNER AT LEAST 4 WEEKS PRIOR TO THE COMMENCEMENT
OF BEACH FILL PLACEMENT. THE UPDATED BEACH SURVEY WILL BE USED TO ADJUST THE
LIMITS AND GRADE LINES TO MEET THE FILL DENSITIES PROVIDED WITH THE SECTIONS ON
SHEETS C-303.
3. SAND SHALL BE PLACED WITHIN THESE LIMITS AND GRADE LINES AS PRACTICALLY AS
POSSIBLE. TOLERANCE SHALL BE WITHIN i0.5 FOOT FOR BERM ELEVATION AND WIDTHS
OUT TO THE MEAN TIDE LEVEL (MTLL PAYMENT WILL BE MADE FOR THE CY/FT SHOWN ON
THE PLANS WITH A TOLERANCE OF a10%. EVERY ATTEMPT WILL BE MADE BY THE
CONTRACTOR TO FILL WITHIN THE PRESCRIBED TEMPLATE. SEE TECHNICAL
SPECIFICATIONS. THE BEACH FILL SHALL BE PLACED BY REACH FROM EAST TO WEST.
4. THE OWNER MAY MAKE ALTERATIONS IN THE PLAN DIMENSIONS, GRADE OF SLOPES, OR VOLUME
OF FILL PER FOOT OF BEACH IN ORDER TO ACCOUNT FOR CHANGED CONDITIONS SINCE THE TIME
OF THE EXISTING CONDITIONS SURVEY. THE CONTRACTOR SHALL WORK CLOSELY WITH THE
OWNER TO ENSURE THAT THE TOTAL QUANTITY OF SAND ALLOWED UNDER THE CONTRACT IS
PLACED AS EFFECTIVELY AS POSSIBLE.
5. CONTRACTOR SHALL TAKE CARE TO GRADE THE DUNE AND BERM SO THAT PONDING
LANDWARD OF THE CRESTS IS MINIMIZED.
6. EXISTING WALKWAYS SHALL REMAIN AND NOT BE DAMAGED BEYOND CURRENT CONDITIONS. ANY
ADDITIONAL DAMAGE WILL BE REPAIRED OR REPLACED AT THE CONTRACTORS COST AS DIRECTED
BY THE OWNER OR THE ENGINEER. FILL SHALL BE PLACED COMPLETELY UNDERNEATH AND/OR
AROUND STRUCTURES.
7. CONTOURS FOR THE BEACH FILL PLANS ARE SHOWN AT 1 FT INTERVALS.
8. PRE -AND POST -CONSTRUCTION SURVEYS OF THE BEACH AREA SHALL BE COMPLETED BY AN
INDEPENDENT PROFESSIONAL LAND SURVEYOR REGISTERED IN THE STATE OF NORTH
CAROLINA, COORDINATED AND PAID FOR BY THE CONTRACTOR. TRANSECTS SHALL BE AT
100-FOOT INTERVALS. ADDITIONAL ELEVATIONS SHALL BE TAKEN AS NECESSARY TO
ACCURATELY REPRESENT TOPOGRAPHY OF THE BEACH AREA.
9. BEACH FILL SLOPES CALLED OUT ON PLANS ARE HORIZONTAL: VERTICAL.
10. SEE TECHNICAL SPECIFICATION FOR ADDITIONAL PLACEMENT REQUIREMENTS.
11. THE CONTRACTOR SHALL PROVIDE TEMPORARY SAND RAMPS OVER THE PIPELINE FOR
PEDESTRIAN AND EMERGENCY VEHICLE ACCESS ALONG THE BEACH. THE MAXIMUM DISTANCE
BETWEEN THESE TEMPORARY SAND RAMPS SHALL BE 500 FEET. THESE TEMPORARY SAND
RAMPS SHALL BE LEVELED ONCE THE PIPELINE HAS BEEN MOVED. THE CONTRACTOR SHALL
ALSO CONSTRUCT A BARRIER TO KEEP THE PUBLIC AT LEAST 250 FEET FROM THE DISCHARGE
PIPE IN BOTH DIRECTIONS UP AND DOWN THE BEACH. SEE THE TECHNICAL SPECIFICATIONS.
RECEIVED
NOV 2 5 2020
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G-002
INDEX: 2 OF 29

ABBREVIATIONS
CY
CUBIC YARDS
No.
NUMBER
FT
FEET OR FOOT
TYP
TYPICAL
MHW
MEAN HIGH WATER
VEG
VEGETATION
MLW
MEAN LOW WATER
WP
WORK POINT
MTL
MEAN TIDE LEVEL
B.L.
BASELINE
NAD
NORTH AMERICAN DATUM
@
AT
NAVD
NORTH AMERICAN VERTICAL DATUM
APPROXIMATELY
NOAA
NATIONAL OCEANIC AND
ATMOSPHERIC ADMINISTRATION
LEGEND
EXISTING
PROPOSED
MEAN HIGH WATER LINE ---------
-
MEAN LOW WATER LINE
- -
- - - - - MEAN TIDE LEVEL LINE -
- -
- ----
PROPERTY LINE
- --
-Q- -- - MAJOR CONTOUR
- MINORCONTOUR
FILL SLOPE LIMIT ----------------------
FILL SLOPE BREAK --------
CONSTRUCTION BASELINE WORK POINT
0 WP-#N
{Zf NOS STATION
NAME
SHEET TYPE DESIGNATORS
9 GENERAL (COVER SHEET, LEGEND. NOTES)
1 PIANS(HOR120NTALVIEWS)
2 ELEVATIONS NOT TYPICALLY USED)
3 SECTIONS (OVERALL VIEWS)
d LARGE-SCALE VIENS(PVJJS. SECT. OR ELEV.-NOT DETAILS)
5 DETAILS (MAY BE PLAN, SECT. OR ELEV. VIEWS)
B SCHEDULES
USER DEFINED
8 USER DEFINED
9 301SOMETRIC
DISCIPLINE DESIGNATORS
DISCIPLINE
DESIGNATOR
GENERAL
G
SURVEYAIAPPING
V
GEOTECHNICAL
B
CIVILWORKS
W
CNIL
C
STRUCTURAL
S
MECHANICAL
M
ELECTRICAL
E
OTHER DISCIPLINES
X
SECONDARY DESIGNATORS
DEMOLITION
I D
GENERAL
I G
SOBBTRDCTURE
i B
FRAMING
F
COMPONENT
C
SITE
5
LEGEND
VIEW NUMBER
B�SAMPLE VIEW TITLE
CS -SCALE P=58'
SHEET NUMBER VIEW
REFERENCED TO
VIEW TITLE
VIEW NUMBER
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NUMBERS MUST BE QUOTED TOGETHER - EITHER IN A CALLOUT FORMAT AS
SHOWN ABOVE OR IN THE FORM,
'VIEW NO /SHEET NO" (EG Al/CS-5001) C
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G-003
NOT TO BE USED FOR CONSTRUCTION
INDEX : 3 OF 29

S I
` I
�� 20NE 3
ZONE4
CENTRAL REACH
BORRO
BORROW AREA,
SEE SHEET C-120
AR430
N'. 44676 9B
E 2253003.82
ATLANTIC
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NOTES:
1. OFFLOADING STATION AT BEACH NOURISHMENT SITES SHALL BE USED TO
PUMP DREDGED MATERIAL ONTO BEACH. THIS STATION SHALL MOVE EAST
OR WEST AS THE NOURISHMENT PROJECT IS COMPLETED. DREDGED
MATERIAL SHALL BE TRANSPORTED FROM THE BORROW AREA DIRECTLY BY
THE DREDGE AND OFFLOADED AT THIS LOCATION. CONTRACTOR SHALL
PROVIDE MAP OF PROPOSED OFFLOADINGS STATIONS AND PIPELINE IN
ACCORDANCE WITH PERMITS, SEE TECHNICAL SPECIFICATIONS.
2. POTENTIAL PLACEMENT AREA PREVIOUSLY PERMITTED UNDER CAMA N31-20
TO INCLUDE APPROXIMATE FILL LENGTH OF 4,30D FT AND FILL VOLUME OF
165,000 CY. THE VOLUME ASSOCIATED WITH THIS PLACEMENT AREA IS NOT
INCLUDED IN THE TOTAL PROJECT VOLUME FOR THIS PERMIT MODIFICATION
REQUEST
3. 2p,00�90F5OOT BUFFER FOR PLACEMENT OF ANY PROJECT EQUIPMENT AROUND
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INDEX'. 4 OF 29

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INDEX: 5 OF 29

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SHEET C-107
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INDEX- 8 OF 29
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INDEX : 9 OF 29

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INDEX'. 10 OF 29

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RECEIVED
n N 60' 0' 60120
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0
FOR PERMITTING
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NOT TO BE USED FOR CONSTRUCTION
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Reference N0.
C-107
INDE%. 13 OF 29
tI

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RECEIVED
NOV 2 5 2020
DCM WILMINGTON, NC
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SCALE: 1"=60'
FOR PERMITTING
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Reference No.
C-108
INDEX: 14 OF 29

3
A
SURVEY ',.
B.L.
WESTBEACHDRIVE _
PROPOSEDLANOWARD - -
-- TOE OF DUNE(EL VARIES) - - 2016VEGUNE _ -- --r- �'o �m m of 1"O �i-� g,mm j
w 17N `m OW J m y ZD yN X.
p0 mZ XZ "O SO Cm� y2 mOZ rSnXAA Az 0,
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m� mr O�O mm ¢ DC OSy _y yC rOp. Z Sm mZ D p00 Z OD Dm vm ym 00 mr p
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_pXO -Xp Z� r tti CvM~__�O< A m�r11A 32C r0 : Oy0 �S mmm O<p mr �O 00 t/i CTr., 00 Zp -I m_..
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0' 60. 120'
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Refererxe No.
C-109
INDEX: 15 OF 29
�I

PRnPOSFD I ANDWARn
M. m�
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NOV 2 5 2020
SCALE: 1"=80'
so
Sheet e
FOR PERMITTING
Refere eNo
ISSUED: 2020-11-18
C-110 `s
DCM WILMINGTON, NC
NOT TO BE USED FOR CONSTRUCTION
INDx +6 OF 29 4
1 2 3 4 6
6

-'- 2016 VEG LINE TOE OF DUNE (EL VARIES) � > m P' cm
co nm x No m0T nny DO o 1-am AGI �O vpi0 w0 Xm o-
w nn NA 'MO A.am <4 i x y cx cc n ➢N
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NOT TO BE USED FOR CONSTRUCTION
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Reference No.
C-112
INDEX: 13 OF 29

J
WEST BEACH DRIVE
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Reference N9.
C-113
INDEX. 19 OF 29

IMP%
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t n- -F O O A O A i m F p C N X m A C N m N N 1 T m m N Z 1 (n0 ZD D ,nZ mmm -1 -im f N rN O mm -i -i m Af IT
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OF 29 ,
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NOV 2 5 2020 SCALE: 1"=60'
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NOV 2 5 11 SCALE: 1"=60'
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DC+: VdiLP�lll`JG (ri"I, i'IL -11-18 NOT TOBEU USED OH OONSTRUCTION
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Reference No,
C-116
INDEX: 22 OF 29

IQI
PROPOSED LANDWARD
y
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`PROPOSED LANDWARD
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PROPOSED TOP
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TOE (EL VARIES)
ATLANTIC OCEAN
RECEIVED
NOV 2 5 2020 N
DCM WILMINGTON, NC 0
60' o' sP 120'
SCALE: 1"=60'
FOR PERMITTING
ISSUED: 2020-11-18
NOT TO BE USED FOR CONSTRUCTION
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INDEX', 29 OF 29
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RECEIVED
NOV 2 5 2020
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NOT TO BE USED FOR CONSTRUCTION
INOE%'. 2a OF 29
6
fI

1 2 3 4 5 6
i pwi$� i
E A - y •,', li LEGEND a s
PI A PROPOSED BORROW AREA CONTROL POINT
ny JB-D0 JAY BIRD SHOALS VIBRACORES
L-0 D2 JB-19 0 - -21 JB 0 - ®
01 JAY BIRD SHOALS BORROW AREA
rx ZONE I EL .0
(+2FT OVERDVERDREDGE) --- NAG ANOMALY (MARINE DEBRIS)
u All v
D c
MAG ANOMALY
(MARINE DEBRIS) 3
-1 J T E0 JB-02 D JB-03A 0 JB 04A
f.
ZONE 2EL -35.0 _
D (+2FT OVERDREDGE) 0-i�-��ii�� D Z
F G % Jrvr W
R O eo �Q
O
O 21 S Q
0 JB-05 - yi , �- W F NO O
/Y R
=W m0
sa '°
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{ (*2FT OVERDREDGE) Q
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2
0 JB-09A �'' 0 JB-10 N B- A�' 0 -1
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2 Ta
j M1
- 0 JB-16A 0 JB-15 0 M J 3
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SCALE: V=1000' -
Sheet o
DCM VVIL��1l d: fD't : �.
FOR PERMITTING Referen eNo
ISSUED: 2020-11-18 C.jj j �
NOT TO BE USED FOR CONSTRUCTION
INDEX: 25 OF 29 4
2 3 4 5 6
JAY BIRD SHOALS
CONTROL POINT TABLE
POINT
NORTHING
FASTING
A
48860.91
2286099.73
B
48860.91
2290099.73
C
4]860.91
2290099.73
0
47857.74
228709913
E
47360.91
2287099]3
F
46854.57
2287604.15
G
46854.89
2288099.73
J
4fi856.16
2290099.]3
K
43856.16
2290099.73
L
43856.16
2289099.73
M
44354.57
2289099 73
N
45356.75
2288101 32
O
46860.91
2266599.73
R
4fiB60.91
2266099.73
S
45860 91
2286099 ]3
T
45880.91
2285099.73
U
97860.91
2285099.73
V
4]860.91
2286099.73
JAY BIRD SHOALS
BORROW AREA
ZONE
ACRES
ZONE 1
91.8
ZONE2
97.5
ZONE3
1147
TOTAL
3040
JAY BIRD SHOALS
VIBRACORE POINT TABLE
POINT
NORTHING
EABTING
JB-01
4736D59
2286596.46
JB-02
47353.14
2287596.89
JB-03A
47352.99
2288596.24
JB-04A
47353.46
2289594.06
JB-OS
46359.73
228fi605.98
JB-O6
46354.62
22B759B.32.
JB-07
4635151
2288605.83
JB-08
46352 85
2289609.75
JB-09A
45360.59
228fifi06.37
JB-10
4535427
228759825
JB-11A
45357.10
2288592.58
JB-12
45348.52
2289595,17
JB-13
44354.30
2289fi02.14
JB-14A
4436530
2288598.53
44367.78
2287596.08
44355.91
2286597.20
46356.27
2285603.09
FB5
47381 47
2285602.67
48356.73
228559676
48360.94
228859856
48360.80
2287600 43
JB-22
483fi3.69
2288600.72
JB-23
48362.99
2289602.58
W
)
E yi
i
Y
gE

u,
!�Y
/AQ02 0 CR-01 0 CR-02
C-3
W
ZONE 1 EL -388 0
i (,2FT OVERDREDGE)
ZONE 2 EL .39.7
(+2FT OVERDREOGE)
04 0 CR-40
C302
MM
I-
KK
A CR-17
0 CR-23 0 CR-22
0 CR-03
�X
v D2
caoz
Z
AA 0 CR-11
- ZONE 3 EL -3T3
(+2FT OVERDREDGE)
0. CR-15 0 CR-14
a 3oz
ZONE 4 EL -40.0
(,2FT OVEROREDGE)
0 CR-102
0 CR-101
N
0 CR-04
0 CR-05
0 CR-12
0 CR-13
0 CR-21
0 CR-103
LEGEND
A0 PROPOSED BORROW AREA CONTROL POINT
CR4,, CENTRAL REACH VIBRACORES
® CENTRAL REACH BORROW AREA
CENTRALREACH
CONTROL POINTS TABLE
POINT
NORTHING
FASTING
49222.42
2252645.68
48721.61
2252654.13
40721,89
2251663.11
FGG
47721.89
2251662,04
47719.74
2253662.04
46]4447
2253661.50
46769,74
2253161.50
20.27
2262161.5023.64
2250711 0122,96
2250661.5022,69
p
2250662,0422,42
2250664.7322A2
2250664.7322.96
2250665.26
X
50721.05
2252615,40
V
50221.30
2252W5.01
Z
49721 06
2252614.33
CENTRALREACH
BORROW AREA
ZONE
ACRES
ZONE i
442
ZONE2
45.3
ZONE 3
22.9
ZONE 4
67S
TOTAL
180B
RECEIVED
CENTRALREACH
VIBRACORE CONTROL TABLE
NORTHING
EASTING
51228.OG
2251170.00
5117973
225216303
E
51220.27
2253091,56
51215.33
225416265
5022473
2254166,45
50219.36
22520D9.67
CR-08
50228.70
2251166.70
CR-09
492MA4
2251168.41
CR-10
49224.62
225217130
CR-11
49225fi9
2253167.01
CR-12
49220.35
225440564
CR-13
48225.79
2254157,00
CR-14
48227.10
2253158.70
CR-15
48225.39
2252158,91
CR-16
48222.52
2251162.17
CR•17
47196,78
225015064
CR-1B
47234.38
2251315.62
CR-19
47226.26
2252158.67
CR-20
47224.75
22531 W 76
CR-21
47224,88
2254160.38
CR-22
4623502
2251142.30
CR-23
46217.04
225036573
CR40
49284.32
2250310.40
CR-101
46218.09
2252165,59
CR-102
4631929
2253165,62
CR-103
46219,72
2254164.81
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FOR PERMITTING Referen eN0 0
ISSUED: 2020-11-18 O-12U'
NOT TO BE USED FOR CONSTRUCTION
INDEX. Pfi OF 29 V
6

15
20F
EXISTING —
GROUND
_ ____. -2C
ZONE 1 TARGET EL -26.0 5.1
i (+2 FT OVERDREDGE)
— —. -2E
OVERDREDGE (EL -28D)
35
s.nn n.m 1in+nn 15+nn 2n+m 25+n0 30+0 35+00
DISTANCE (FEET)
D2 SECTION
C-118 SCALEASNOTED
m
20
—._ ._.. .-..
_--_
i
-20
EXISTING
— — — —
GROUND- \
— _ _ —
— _ — — —
ZONE 3 TARGET EL -27 0
_-- _— —--- __ _ _ —
—
(+2 FT OVERDREDGE)
— - --� _
s.e
- — —
-25
25
-- _-_ _._—._. ._..__._ _ _ __ __ _-_ ._ .. ___
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- SLOPE TRANSITION --
-----
BETWEEN ZONE 2
i
AND ZONE 3
5:1
_
30
51
OVERDREDGE (EL -29.0)
ZONE 2 TARGET EL -35.0
(+2 FT OVERDREDGE)
35
__—_—.___. _
35
OVERDREDGE (EL -37.0)
40
40L
.rn
s.rn �n.m x.nn 1e v,nn
an+nn m+nn AO+nD
45+00 50+00 55+00 60+00
65+00 70+04
DISTANCE (FEET)
B1 SECTION
C- SCALE AS NOTED
if
F
$
55
a:
�s
o¢S
a O
U
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L
O
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RECEIVED
5' 33' 1P i
1
NOV 2 5 �11 _,) 15O VERTIICAL SCALE:ISO' =5 300 A �
aru 5
HORIZONTAL SCALE: V=300' -
". Sheet
D !'�, r.l V! .
FOR PERMITTING Referen eNo
ISSUED: 2020-11-18 C-301 °
NOT TO BE USED FOR CONSTRUCTION L
INDEX'. 27 OF 23
5 6

1
2
3
4
4
-30
30
30
-30
ZONE 1 TARGET EL -38.0
(+2 FT OVERDREDGE) EXISTING
m ZONE 2 TARGET EL -39.7
EXISTING
-35 - - _ GROUND _._.. JS -35 (+2 FT OVERDREDGE) GROUND -35
E
—
_
g
w
�
5' 1
SOz
_
40 - 0 - - - - 40
z
OVEROREDGE (EL 40.0)
< -40 - - - - - - - -
- -- - - - - -
O
>
w
w
OVERDREDGE (EL 41.7)
w
w -05
45
-05
45
0+00
5+00 10+00 15+00 20+00
25+00
0
-5+00 0+00 5+00
70+0D 15«00
20+00
25+00 30+00
DISTANCE (FEET)
DISTANCE (FEET)
02 SECTION
C-120 SCALE:ASNOTED D4 SECTION
C-120 SCALE: AS NOTED
D
D
i
yN
O
O
0
Uy
2
¢O
Ws
R
-30
-30
-30
-30
p W
3 W
ZONE 3TARGET EL -
EXISTING
¢
N
R
m
(+2 FT OVERDREDGE))
GROUND
_
m
ZONE 9TARGET EL-00.0
JQ
Ny
Oj
>
EXISTING
(*2 FT OVERDREDGE)
m
z-35
___..
_. _. -35
i
-35
GROUND
_. __ _ _—__-.__ _ ___._.___
- _. .. ___._ .. _._ ___.
.-. ____
- 35
Y
Q
5.1
z
----- --
��.
J/
$1
-0p
40 __ _
_..._. __- MROREDGE(EL -393)-- yp
<
C
>
D
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C
o
w
w
OVERDREDGE (EL-02.0)
£
7
3
45
-5+00
0-00
5+00 10+00 15+00 20+005
45+00
0+00 5+00 10+00
15+00 20+00
25-00
-05
30+00 35+00 40+00
R
a
f
e
i
X
i
DISTANCE (FEET)
DISTANCE (FEET)
d
[
a
a z
Cz0 SECTION
C3 SECTION
ED
C120 SCALE ASNOTED
b
+
3y
b t Q
g
a{d
m
i
�a'„ $
2
n
4p
&
�
asa
q
i z.tl
n
B
B
o
R,
30
N
�@
30
ZONE 4 TARGET EL 40D
ZONE 3 TARGET EL
-37.3
EXISTING ZONE 1 TARGET EL -380
c
o (+2 FT OVERDREDGE)
(+2 FT OVERDREDGE)
GROUND (+2 FT OVERDREDGE)
°
r -35-- _ -
_
—��
35
c
—
J-, �_. _—�—_._
ti
w
J — -- —
ZONE 2 TARGET EL-39.7
o
g
_
— — — -'- �`
(+2 FT OVERDREDGE)
51
°
p
o
-40 _ _. _ _ 5.1
51
- 31 - _
aD
E
o
5 1
OVERDREDGE OVERDREDGE
w OVERDREDGE
(EL-39.3) OVERDREDGE
(EL -00.0)
(EL -02 O)
(EL -41.7)
-05
-05
g
-5.00 0+00 5+00
10+00
15+00
20+00 25+00 30.00
35+00 40++00
45+00
S o' 610•
DISTANCE (FEET)
[^
REC��v�,-
-
mommia
e
x
A
VERTICAL SCALE: 1"=5'
A
o
A2 SECTION
150• 0 150• 300
C-120 SCALE AS NOTED
I j�
nnv 5 21
s
HORIZONTAL SCALE: 1"=300'
Sheet
h
FOR PERMITTING
Re1efen"°
DCi=fi ��11ELi:%:iP1G
1 _::, i:J
ISSUED: 2020-11-18
C-302
�
NOT TO BE USED FOR CONSTRUCTION
—6-
INDEX : 28 OF 29
,
4
1
2
3
4
5

30-
PLANTING OCCURS ON CREST
8 BACK SLOPE OF DUNE
DUNE TOP EL 15.0
DUNE WIDTH 10.0'
5^ BERM SLOPE BREAK EL 7 0
BERM SLOPE BREAK EL 7.0 _
EXISTING
\ 20.1 GROUND
....._ ., MHW 1.8'
S MTL -0.6'
MIw-o o•
STA 210+00 TO STA 235+00
D1 SECTION
C-303 SCALE' AS NO
BERM SLOPE BREAK. 7.0
EXISTING
GROUND
STA 235+00 TO STA 275+00
Cl SECTION
C-30J SCALE: A6 NOTED
PLANTING OCCURS ON CREST
8 BACK SLOPE OF DUNE
DUNE TOP EL 14 5
DUNE WIDTH 100'
5^ BERM SLOPE BREAK EL 7.0
\ ?j BERM SLOPE BREAK EL 7.0
g MHW 1.9
g MTL -0,15
8 MLW -2.9'
20:1 GROUND QMHW1.8'
gMTL -0.6'
S MLW-29-2.9'
2+00 3-00
STA 275+00 TO STA 295+71
Al SECTION
C-30J SCALE AS NOTED
PLANTING OCCURS ON CREST
8 BACK SLOPE OF DUNE
DUNE TOP EL 13.0 TO 14.0
DUNE WIDTH 100'
DUNE SLOPE BREAK EL 7.0
\ 20:7 E%ISTING gMHWt
\ \ GROUND MTL-0
MLW—'
STA 501+00 TO STA 620+00
D3 SECTION
L� SCALE AS NOTED
PLANTING OCCURS ON CREST
8 BACK SLOPE OF DUNE
DUNE TOP EL 13.0 TO 15.5
DUNE WIDTH 10.0'
BERM SLOPE BREAK EL TO
BERM SLOPE BREAK EL TO
^ ` EXISTING
�- GROUND
20.1
120'-0"
STA 620+00 TO STA 647+00 & STA 659+50 TO STA 665+50
C3 SECTION
L303 SCALE AS NOTED
PLANTING OCCURS ON CREST
& BACK SLOPE OF DUNE
DUNE TOP EL 15.5
DUNE WIDTH 10.0'
BERMSLOPEBREAKELTO
-L 0 4j BERM SLOPE BREAK EL 70
-- EXISTING
1 GROUND MHW 1.8'
$ MTL -0.6
_ 201 MLW-2.9'
LANDWARD 120'-0"
TIE-IN EL 7 0
RECEIVED
2.00 Jo a:oo D
.o
STA 647+00 TO STA 659+50 & STA 665+50 TO STA 676+34 N 0 V 2
A3 SECTION
L303 SCALE AS NOTED UC.,AW9L�,,',li,+l,I;
JL
p s
-
=u
a
+
a K
6�
6�E
2�
. o
c
`D
E
100' 10' 20'
VERTICAL SCALE: 1"=20'
A
50' 0' 50' 100'
sFAL
HORIZONTAL SCALE: 1"=100'
Sheet
FOR PERMITTING
Reference No.
ISSUED: 2020-11-18
C-303
NOT TO BE USED FOR CONSTRUCTION
INOE%: 29 OF 2

06M MP-1
APPLICATION for
Wor Development Permft
(last revised 12/27/06)
North Carolina DIVISION OF COASTAL MANAGEMENT
1. Primary Applicant/ Landowner Information
Business Name
Project Name (if applicable)
Town Of Oak Island
2021/2022 Oak Island Renourishment Project
Applicant 1: First Name
MI
Last Name
David
Kelly
Applicant 2: First Name
MI
Last Name
If additional applicants, please attach an additional page(s) with names listed.
Mailing Address
PO Box
City
State
4601 E Oak Island Drive
Oak Island
NC
Phone No.
ZIP
Country
FAX No.
910-278-5011
28465
USA
910 - 201 - 8002 ext.
Street Address (if different from above)
City
State
ZIP
Email
[e-mail]
2. Agent/Contractor Information
Business Name
Moffatt & Nichol
Agent/ Contractor 1: First Name
MI
Last Name
Johnny
D
Martin
Agent/ Contractor 2: First Name
MI
Last Name
Mailing Address
PO Box
City
State
4700 Falls of Neuse Road, Suite 300
Raleigh
NC
ZIP
Phone No. 1
Phone No. 2
27609
919-781-4626
ext.
ext.
FAX No.
Contractor #
919 781 4869
Street Address (if different from above)
City
State
ZIP
Email
[e-mail]
I I U I a 11 "-1
<Form continues on back>
252-BOB-2808 .. 1.888.4RCOASt rnv w.nGeoastal r.s esn;;ge�nent. n=:i

Form DCM MP-1 (Page 3 of 5)
APPLICATION for
Major Development Permit
3. Project Location
County (can be multiple)
Street Address
State Rd. #
McGlamery St to SE 63rd St;
71h/10`h PL W to West End Beach
N/A
Brunswick
Access
Subdivision Name
City
State
Zip
Oak Island
NC
28465-
Phone No.
Lot No.(s) (if many, attach additional page with list)
- - ext.
I I ,
a. In which NC river basin is the project located?
b. Name of body of water nearest to proposed project
Lumber
Atlantic Ocean
c. Is the water body identified in (b) above, natural or manmade?
d. Name the closest major water body to the proposed project site.
®Natural ❑Manmade ❑Unknown
Atlantic Ocean
e. Is proposed work within city limits or planning jurisdiction?
f. If applicable, list the planning jurisdiction or city limit the proposed
®Yes ❑No
work falls within.
Town of Oak Island
4. Site Description
a.
Total length of shoreline on the tract (ft.)
b. Size of entire tract (sq.ft.)
26,100 ft
N/A
c.
Size of individual lot(s)
d. Approximate elevation of tract above NHW (normal high water) or
N/A, I
NWL (normal water level)
(If many lot sizes, please attach additional page with a list)
-10 to 15.5 ft NAVD88 (-11.8 ft to 13.7 ft M HW)
❑NHW or ❑NWL
e.
Vegetation on tract
Primary dune vegetation including sea oats and bitter panicum; heavily eroded and escarped dune and native dune
vegetation will be replaced during project construction
f.
Man-made features and uses now on tract
No man-made features other than beach access stairs/dune walkovers; uses include public recreation and habitat for sea
turtles, shorebirds, etc.
g.
Identify and describe the existing land uses adlacent to the proposed project site.
Developed - residential
h.
How does local government zone the tract?
i. Is the proposed project consistent with the applicable zoning?
N/A
(Attach zoning compliance certificate, if applicable)
❑Yes ❑No ®NA
j.
Is the proposed activity part of an urban waterfront redevelopment proposal? ❑Yes ®No
k.
Hasa professional archaeological assessment been done for the tract? If yes, attach a copy. ®Yes ❑No ❑NA
If yes, by whom? Tidewater Atlantic Research, Inc.
I.
Is the proposed project located in a National Registered Historic District or does it involve a ❑Yes ®No ❑NA
National Register listed or eligible property?
<Form continues on next page> 20
1.A 8%s ANCOA'-6f wwrrtairnanar/:� i�.•,.net -

Form DCM MP-1 (Page 4 of 5)
APPLICATION for
Major Development Permit
m. (i) Are there wetlands on the site? ❑Yes ®No
(ii) Are there coastal wetlands on the site? ❑Yes ®No
(iii) If yes to either (i) or (ii) above, has a delineation been conducted? ❑Yes ®No
(Attach documentation, if available)
n. Describe existing wastewater treatment facilities.
The Town's wastewater treatment is handled by an off -site treatment center.
o. Describe existing drinking water supply source.
Potable water in Oak Island is provided by Oak Island Public Utilities Department & utilizes deep groundwater wells and the
Cape Fear River for water supply
p. Describe existing storm water management or treatment systems.
No impervious area - all stormwater infiltrates on the beach
5. Activities and Impacts
a.
Will the project be for commercial, public, or private use? ❑Commercial ®Public/Government
❑Private/Community
b.
Give a brief description of purpose, use, and daily operations of the project when complete.
The proposed project consists of excavating up to 1,667,000 cy (includes 30% dredge losses) of beach -quality sediment.
from the Jay Bird Shoals borrow area, located approximately one mile offshore of Oak Island/Caswell Beach, and from
Central Reach Borrow area, located approximately 1.8 miles offshore of the western end of Oak Island. The renourishment
placement area will cover approximately 26,100 ft along the oceanfront shoreline of Oak Island. See attached project
narrative for more information.
c.
Describe the proposed construction methodology, types of construction equipment to be used during construction, the number of each type
of equipment and where it is to be stored.
The proposed project would involve use of a hopper dredge and/or cutter suction dredge to excavate beach compatible sand
from Jay Bird Shoals and Central Reach Borrow Areas. Placement and grading activities on the beach would involve the use
of bulldozers to redistribute and grade the beach fill material to the proposed beach profile. Land -based equipment will be
brought to the site over public roads and will enter the beach at existing permanent beach access points and stored in upland
staging areas. See attached project narrative for more information.
d.
List all development activities you propose.
Excavation and filling by hopper and/or cutter suction dredge and pipeline for beach renourishment; dune restoration and
planting.
e.
Are the proposed activities maintenance of an existing project, new work, or both? Both
f.
What is the approximate total disturbed land area resulting from the proposed project? 197 ❑Sq.Ft or ®Acres
g.
Will the proposed project encroach on any public easement, public accessway or other area ❑Yes ®No ❑NA
that the public has established use of?
h.
Describe location and type of existing and proposed discharges to waters of the state.
Dredge slurry discharge of approximately 75% water and 25% sand along the proposed renourishment placement reaches
i.
Will wastewater or stormwater be discharged into a wetland? ❑Yes ®No ❑NA
If yes, will this discharged water be of the same salinity as the receiving water? ❑Yes ❑No ®NA
j.
Is there any mitigation proposed? ❑Yes No , ❑NA, _ , 1
If yes, attach a mitigation proposal. F""
r
25?,.80i1'28Q6 i.88a ARCC1A';I t

Form DCM MP-1 (Page 5 of 5)
<Form continues on back>
APPLICATION for
Major Development Permit
6. Additional Information
In addition to this completed application form, (MP-1) the following items below, if applicable, must be submitted in order for the application
package to be complete. Items (a) — M are always applicable to any major development application. Please consult the application
instruction booklet on how to properly prepare the required items below.
a. A project narrative.
b. An accurate, dated work plat (Including plan view and cross -sectional drawings) drawn to scale. Please give the present status of the
proposed project. Is any portion already complete? If previously authorized work, clearly indicate on maps, plats, drawings to distinguish
between work completed and proposed.
c. A site or location map that is sufficiently detailed to guide agency personnel unfamiliar with the area to the site.
d. A copy of the deed (with state application only) or other instrument under which the applicant claims title to the affected properties.
e. The appropriate application fee. Check or money order made payable to DENR.
f. A list of the names and complete addresses of the adjacent waterfront (rlparlan) landowners and signed return receipts as proof that such
owners have received a copy of the application and plats by certified mail. Such landowners must be advised that they have 30 days in
which to submit comments on the proposed project to the Division of Coastal Management,
Name S&F Office Rentals LLC Phone No.
Address 100 Martin Ln, Oak Island, NC 28465
Name Surratt Todd J Phone No.
Address 117 SE 63rd Street, Oak Island, NC 28465
Name Pace Emily S and Starcher Mary C Phone No.
Address 707 West Beach Drive, Oak Island, NC 28465
g. A list of previous slate or federal permits issued for work on the project tract. Include permit numbers, pennittee, and issuing dales.
General Permit #s 63904-63907, issued 21 May 2014 CAMA Major Permit #140-10, issued 26 January 2017
CAMA Minor Permit #01 17-11, issued 8 March 2017 CAMA Major Permit #31-20, Issued 6 March 2020
401 WQC004215, issued 27 January 2020 SAW-2018-02230, issued 27 April 2020
h. Signed consultant or agent authorization form, if applicable.
I. Welland delineation, if necessary.
j. A signed AEC hazard notice for projects in oceanfront and Inlet areas. (Must be signed by property owner)
k. A statement of compliance with the N.C. Environmental Policy Act (N.C.G.S. 113A 1-10). if necessary. If the project involves expenditure
of public funds or use of public lands, attach a statement documenting compliance with the North Carolina Environmental Policy Act.
1 7. Certification and Permission to Enter on Land I
I understand that any permit Issued in response to this application will allow only the development described in the application.
The project will be subject to the conditions and restrictions contained in the permit.
I certify that I am authorized to grant, and do in fact grant permission to representatives of state and federal review agencies to
enter on the aforementioned lands in connection with evaluating information related to this permit application and follow-up
monitoring of the project.
I further certify that the information provided in this application is truthful to the best of my knowledge.
Date July 29, 2020 Print Name _David Kelly II
Signature �--
Please indicate application attachments pertaining to your proposed project. RECEIVED
®DCM MP-2 Excavation and Fill Information ❑DCM MP-5 Bridges and Culverts
❑DCM MP-3 Upland Development
❑DCM MP-4 Structures Information
NOV 2 5 2020
DCi✓ V!;L`C,,'G'TL7;11, NC
2 5 2 - 8 0 8 - 2 8 0 3 .. 1-888-4 RCO AST .. v✓w w. 11 cc 0 a 3 t a l nl an a y e me 11 t. net

Form DCM MP-2
EXCAVATION and FILL
(Except for bridges and culverts)
Attach this form to Joint Application for CAMA Major Permit, Form DCM MP-1. Be sure to complete all other sections of the Joint
Application that relate to this proposed project. Please include all supplemental information.
Describe below the purpose of proposed excavation and/or fill activities. All values should be given in feet.
Access
Other
Channel
Canal
Boat Basin
Boat Ramp
Rock Grofn
Rock
(excluding
(NLW or
Breakwater
shoreline
NWL)
stabilization
Length
N/A
N/A
N/A
N/A
N/A
N/A
26,100'
Width
561'
Avg. Existing
1.65'
Depth
NA
NA
NAVD88
Final Project
+15.5'
Depth
NA
NA
NAVD88 &
Below
1.
EXCAVATION
[I This section not applicable
a.
Amount of material to be excavated from below NHW or NWL in
b. Type of material to be excavated.
cubic yards.
Fine-grained sand. See attached project narrative
1,667,000 cy
c.
(i) Does the area to be excavated include coastal wetlands/marsh
d. High -ground excavation in cubic yards.
(CW), submerged aquatic vegetation (SAV), shell bottom (SB),
None
or other wetlands (WL)? If any boxes are checked, provide the
number of square feet affected.
❑CW ❑SAV ❑SB
OWL ®None
(ii) Describe the purpose of the excavation in these areas:
Beach Renourishment for Oak Island Shoreline
2.
DISPOSAL OF EXCAVATED MATERIAL
This section not applicable
a.
Location of disposal area.
b. Dimensions of disposal area.
Oceanfront Shoreline - Town of Oak Island
26,100' Long x 561' Wide
c.
(i) Do you claim title to disposal area?
d. (i) Will a disposal area be available for future maintenance?
[]Yes [:]No ®NA
®Yes [:]No ❑NA
(ii) If no, attach a letter granting permission from the owner.
(ii) If yes, where?
Along entire oceanfront shoreline as needed for
maintenance & replacement
e.
(i) Does the disposal area include any coastal wetlands/marsh
f. (i) Does the disposal include any area in the water?
(CW), submerged aquatic vegetation (SAV), shell bottom (SB),
®Yes ❑No ❑NA
or other wetlands (WL)? If any boxes are checked, provide the
number of square feet affected.
(ii) If yes, how much water area is affected?
❑CW ❑SAV [-]SB
134 Acres below MHW 49 Acres below MLW
❑WL ®None
(ii) Describe the purpose of disposal in these areas:
Shore Protection
CEC i ?
25?
308-2808 :: 1-888-4RCOAST revised; 12/26/66

Form DGM MP-2 (Excavation and Fill, Faye 2 of 3)
a.
Type of shoreline stabilization:
b.
Length: 26100'
[_]Bulkhead ❑Riprap ❑Breakwater/Sill ®Other: Beach
Width: 561'
Nourishment
—
c.
Average distance waterward of NHW or NWL: Existing to
d.
Maximum distance waterward of NHW or NWL: 279'
proposed MHW- 93'
e.
Type of stabilization material:
f.
(i) Has there been shoreline erosion during preceding 12
Fine-grained sand
months?
®Yes ❑No ❑NA
(ii) If yes, state amount of erosion and source of erosion amount
information.
245,497 CY Volume Loss Above EL -12' NAVD88 During
Hurricane Florence - 341,918 CY Volume Loss Above EL -12'
NAVD88 During Hurricane Isaias
g.
Number of square feet of fill to be placed below water level.
h.
Type of fill material.
Bulkhead backfill _ Riprap _
Fine-grained sand
Breakwater/Sill _ Other 5,852,607 so. ft. below MHW
2 150.482 sg. ft. below MLW
i.
Source of fill material.
-
Jay Bird Shoals and Central Reach Borrow Areas- See Maps
4.
OTHER FILL ACTIVITIES
❑This section not applicable
(Excluding Shoreline Stabilization)
a.
(i) Will fill material be brought to the site? ®Yes []No []NA
b.
(i) Will fill material be placed in coastal wetlands/marsh (CW),
If yes,
submerged aquatic vegetation (SAW shell bottom (SB), or
(ii) Amount of material to be placed in the water 535,834 cv
other wetlands (WL)? If any boxes are checked, provide the
below MHW 191,049 cv below MLW
number of square feet affected.
(iii) Dimensions of fill area 26,100' Long x 561' Wide
❑CW ❑SAV ❑SB _
❑WL ®None
(iv) Purpose of fill
Shoreline Protection
(ii) Describe the purpose of the fill in these areas:
N/A
5-
GENERAL
a.
How will excavated or fill material be kept on site and erosion
b.
What type of construction equipment will be used (e.g., dragline,
controlled?
backhoe, or hydraulic dredge)?
See Attached Project Narrative
Trailing Suction Hopper Dredge or Cutter Suction (hydraulic)
Dredge
c.
(i) Will navigational aids be required as a result of the project?
d.
(i) Will wetlands be crossed in transporting equipment to project
®Yes ❑No ❑NA
site? []Yes ®No [:]NA
(ii) If yes, explain what type and how they will be implemented.
(ii) If yes, explain steps that will be taken to avoid or minimize
US Coast Guard will be notified and a Notice to Mariners will be
environmental impacts.
published.
,,h7ty-29,w2020
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,.„y ... .- -. _ revised:l2/26/06

1w
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Dale
2021/2022 Oak Island Renourishment Project
Project Name
David Kelly II, Town Manager
A t Namµ e �
Applicant Signature
DEC 17
DCLI W:UL!:'i:C j C: ,

ROY COOPER NORTH CAROLINA
Governor Environmental Quality
MICHAEL S. REGAN
Secretary
BRAXTON C. DAVIS
Director December 18, 2020
Mr. Johnny Martin
Moffatt & Nichol
4700 Falls of Neuse Road, Suite 300
Raleigh, NC 27609
Dear Mr. Martin:
The Division of Coastal Management hereby acknowledges receipt of your application, acting as agent for the
Town of Oak Island, for State approval to expand the Town of Oak Island's beach nourishment project, with
the expanded location extending from McGlamery St to SE 63rd St. and between 7th/1 Oth PL W to the West
End Beach Access, in Oak Island, Brunswick County, and adjacent to the Atlantic Ocean. It was received as
complete on 11/25/20 and appears to be adequate for processing at this time. The projected deadline for
making a decision is 2/8/21. An additional 75-day review period is provided by law when such time is
necessary to complete the review. If you have not been notified of a final action by the initial deadline stated
above, you should consider the review period extended. Under those circumstances, this letter will serve as
your notice of an extended review. However, an additional letter will be provided on or about the 75th day.
If this agency does not render a permit decision within 70 days from 11/25/20 you may request a meeting with
the Director of the Division of Coastal Management and permit staff to discuss the status of your project. Such
a meeting will be held within five working days from the receipt of your written request and shall include the
applicant and project designer/consultant.
NCGS I I3A-119(b) requires that Notice of an application be posted at the location of the proposed
development. Enclosed you will find a "Notice of Permit Filing" postcard which must be posted at the property
of your proposed development. You should post copies of this notice at a conspicuous point along the project
area where it can be observed by the public. Failure to post this notice could result in an incomplete
application.
An onsite inspection will be made, and if additional information is required, you will be contacted by the
appropriate State or Federal agency. Please contact me if you have any questions and notify me in writing if
you wish to receive a copy of my field report and/or comments from reviewing agencies.
Sincerely,
Heather
Beach & Inlet Management Project Coordinator
cc: MHC Files, DCM David Kelly, Town of Oak Island
Greg Currey, COE Dawn York, Moffatt & Nichol
WOW
D_EQ!
ao.�aernwr.m uw�
North Carolina Department of Environmental Quality j Division of Coastal Management
Wilmington Office 127 Cardinal Drive Extension Wilmington, North Carolina 28405
910.796.7215

DIVISION OF COASTAL MANAGEMENT
FIELD INVESTIGATION REPORT
APPLICANT'S NAME: Town of Oak Island- Major Modification of Permit No. 31-20
2. LOCATION OF PROJECT SITE: The project site is located on Oak Island, from McGlamery St to SE
63rd St and from between 7'h & 1 Oth PL W to the West End Beach Access, Brunswick County.
Approximate State Plane Coordinates — Approx. Lat: 33.902890' N (start)/ 33.912873' N (end)
Long: 78.074842' W (start) / 78.227846' W (end)
3. INVESTIGATION TYPE: CAMA / D&F
4. INVESTIGATIVE PROCEDURE: Dates of Site Visit — 8/26/20,
Was Applicant Present — No
5. PROCESSING PROCEDURE: Application Received—11/25/20
Office — Wilmington
6. SITE DESCRIPTION:
(A) Local Land Use Plan — Town of Oak Island
(B) AEC(s) Involved: OH, PTA
(C) Water Dependent: Yes
(D) Intended Use: Public
(E) Wastewater Treatment: Existing — Municipal Sewer
Planned - N/A
(F) Type of Structures: Existing — Primarily residential structures and accessways
Planned — Dune construction and beach renourishment project
(G) Estimated Annual Rate of Erosion: 0'-2'/year SBF: 2'/year
7. HABITAT DESCRIPTION:
(R)
[AREA]
DREDGED FILLED OTHER
(A) Vegetated Wetlands (coastal)
(B) Other (Below MHW)
— 484 acres
— 134 acres
(C) Other (Above MHW)
—63 acres
Total Area Disturbed: —I97 acres of beach fill
Primary Nursery Area: No
(I) Water Classification: SB Open: No
8. PROJECT SUMMARY: The applicant is proposing to expand their beach nourishment project to
include McGlamery St to SE 63rd St and between 7th/1 Oth PL W to the West End Beach Access.
North Carolina Department of Environmental Quality I Division of Coastal Management
Wilmington Office 127 Cardinal Drive Extension 1 Wilmington, North Carolina 28405
910.796.7215

Town of Oak Island Beach Nourishment- Major Modification P31-20
Page Two
9. PROJECT DESCRIPTION:
The Town of Oak Island is located on a south facing barrier island in Brunswick County between
Lockwoods Folly Inlet and the Town of Holden Beach to the west, and the Town of Caswell Beach and
the Cape Fear River to the east. The Town of Caswell Beach is also located on the island. The Town of
Oak Island is approximately 9 miles in length. It is also bordered by the Atlantic Intracoastal Waterway
(AIWW) to the north and the Atlantic Ocean to the south. The island is accessed via 2 bridges. The
western bridge leads into the Town of Oak Island located off NC Highway 211 via Middleton Blvd. The
eastern bridge leads onto the island between Oak Island and Caswell Beach and is accessed from NC
Highway 133.
This is a proposed modification to the Town's State CAMA/Dredge & Fill Permit No. 31-20 which was
issued in early 2020 (USACE AID# SAW-2018-02230 and DWR Project 92018-1344). A minor
modification was issued shortly thereafter to potentially authorize the removal of a buffer in the borrow
area, should a reported magnetic anomaly be identified as marine debris and removed from the borrow
site. The proposed project would extend the previously permitted project to include the entire oceanfront
shoreline of the Town of Oak Island. The long-term erosion rate for the proposed project area ranges from
0'-2.6'/year. The Division's calculated 100-year storm recession line for the island was predicted to be
180'. Oak Island has experienced significant beach erosion within the last several years as a result of the
numerous recent tropical storms and hurricanes that have affected our coast.
In the original application, the permittee identified a --304 acre borrow site off Jay Bird Shoals to supply
sand for the project. Water depths at the site varied from approximately -20 to -28' NAVD88. Sediments
collected via Vibracore samples within the borrow site showed a Unified Soils Classification System
(USCS) designation of predominantly SP-SM or SW. Gravel sized material (>4.76mm) ranged from 0-
7% with a maximum composite weight of 4.25%. Fines (<0.0625 mm) in individual samples ranged from
1.29% to 9.87% with a maximum composite weight of 6.79% overall. A low -intensity, long -duration
linear feature was originally identified within the borrow site by a remote sensing survey and a minimum
50' buffer area on each side of the anomaly is proposed (see Appendix D- Archeological Remote Sensing
for more information). A follow-up Phase II Remote -Sensing Archeological Survey was later submitted
for inclusion in the application package and a request to remove the buffer was later submitted as a minor
modification request as the anomaly is believed to be modern debris. Dredge depths were divided into
three zones: Zone 1 with an excavation depth of -26' NAVD88, Zone 2 with an excavation depth of -31'
NAVD88, and Zone 3's permitted dredge depth was -27' NAVD88.
The previously permitted placement area extended from 10t1i Place West to SE 63`d Street (-21,000 feet).
The beach fill template included berm fill to an elevation of+7' NAVD 88 with a 20: 1 slope out to tie
into existing grade from - I' to -10' NAVD88 and a dune at an elevation ranging from 13.5' to 14.5'
NAVD88, constructed with a 6' wide dune crest, and at a 5:1 slope. Excavation was calculated at 1.1
million cubic yards with an anticipated final net fill volume of approximately 846,000 cubic yards due to
expected dredge losses.
The native beach was characterized using data collected by Athena. Fines were calculated at 1.88%, with
sand comprising 98.96%, and granular and gravel material each at less than 1%. Mean grain size was
calculated at 0.27mm. Calcium carbonate was reported at 9.72%. The count of shell and
MpYNwil N NMoxmM 0 W Ily�
North Carolina Department of Environmental Quality Division of Coastal Management
Wilmington Office 127 Cardinal Drive Extension I Wilmington, North Carolina 28405
910.796,7215

Town of Oak Island Beach Nourishment- Major Modification #31-20
Page Three
rock material greater than 3" in size was determined to number 58 within a 50,000 square foot area, as
previously determined during the original permit application.
Since the original beach nourishment project was permitted, Hurricane Isaias resulted in significant
erosion of the beach. In response, the Town's major permit for beach bulldozing was modified to allow
them to bulldoze the damaged dune system. This work has been completed. The Town is also repairing
dunes by replacing storm -overwashed sand lost from the beach and dune system via truck haul. This latter
work is exempt from CAMA permitting requirements as it is defined in the Coastal Resources
Commission (CRC) roles as maintenance and repair. This work is being conducted at the present time.
The waters in the project area fall within the Lumber and Cape Fear River Basins, as classified by the NC
Division of Water Resources (DWR). The waters of the Atlantic Ocean are classified as SB by the DWR.
The NC Division of Marine Fisheries has NOT designated any of the areas to be impacted as a Primary
Nursery Area, and there are no foreseen impacts to shellfish resources at this time.
PROPOSED PROJECT:
The applicant is proposing to expand the limits of the previously permitted beach nourishment and dune
building project for the Town of Oak Island. The project site extends the distance of the previously
permitted project approximately 26,100 additional linear feet in total, with 2 reaches extending from
McGlamery St to SE 63rd St, and a second reach starting between 7" & 1 Oth PL W and extending to the
West End Beach Access. The beach berm would be filled to an elevation of+7' NAVD 88 with a 20: 1
slope out to tie into existing grade from -1' to -9' NAVD88 (MLW= -2.9' NAVD88). An engineered
"starter dune" is also proposed along the majority of the expanded area with a maximum elevation
ranging from +13.0' to +15.5' NAVD88, to be constructed with a 10' wide dune crest, and with a 4:1
slope on the waterward side and a 5:1 slope on the landward side. This design appears to advance the
proposed engineered dune to (or in one area waterward of) the current MHW line along part of the project
area. Anticipated fill volumes for the project would place a minimum of 15 with an average of 50 cubic
yards per linear foot. As proposed, a gross excavated volume of up to 1.667 million Cubic yards of sand
has been calculated to account for an estimated placement loss of up to 30%. A total fill volume of
approximately 1,282,000 cubic yards is anticipated to be placed on the beach, given current conditions. It
is currently estimated that 5,852,607 square feet would be filled below MHW (535,834 cubic yards). Of
that material, approximately 2,150,482 square feet (191,049 cubic yards) would also be located below
MEW. Approximately 2,740,996 square feet (746,166 cubic yards) of beach fill material would be placed
above the MHW line. The applicant also estimates approximately 93' of fill would be placed water -ward
of the current MHW line on average, within a maximum projected distance of 279' of fill placed below
MHW. A table provided by the applicant in the narrative (Table 2-3) shows the average pre -Matthew
beach width ranging from 57'-69', and the average anticipated post -construction equilibrated beach width
ranging from 73'-96'. However, it should be noted that the estimates provided are based on a single
"representative profile" for each area (4 profiles in total for the project area) and estimated equilibration
was simulated using SBEACH and a 2-year return period storm. While the applicant asserts the estimated
equilibrated recreational beach width (the distance between +7' NAVD88 to MHW) will increase the
beach width that existed prior to Hurricane Matthew, there appears to be potential for post -equilibration
narrowing of the beach width should Oak Island experience more than a 2-year storm.. The applicant has
also stated this project is the second phase of the Town's overall plan, and the Town still intends to apply
for a more comprehensive beach restoration project in the near future, but there is no apparent
North Carolina Department of Environmental Quality Division of Coastal Management
Wilmington Office 127 Cardinal Drive Extension I Wilmington, North Carolina 28405
910.7967215

Town of Oak Island Beach Nourishment- Major Modification #31-20
Page Four
guarantee of future projects at this time; as stated in the narrative, future projects are dependent on
funding. The application states the purpose of the project, which is designed to withstand a 25-year return
period storm event, is to protect infrastructure and property while maintaining tax revenues to the Town,
County and State, as well as to preserve the environmental, cultural, and aquatic resources of the Town
and County. Planting of dune vegetation is also proposed on the crest and backslope of the proposed
started dune. This would likely facilitate the establishment of stable, natural vegetation. And while the
applicant states the importance of maintaining the pre -Matthew dune and location of stable, natural
vegetation to protect construction setbacks, the project design shifts the starter dune waterward of the
frontal dune's pre -Matthew location, as shown in the profile drawings included in Appendix J-
Supplemental Profiles and Figures 2-8 and 2-9 of the narrative (Project Stations 667+65 & 669+65).
The applicant states the entire volume of material will still be available in the previously permitted Jay
Bird Shoals site, as proposed, although they are also requesting to allow dredging from a second borrow
area at Central Reach, The Jay Bird Shoals site has been divided into three zones: Zone 1 would be
excavated to a depth of -26' NAVD88, with a proposed 2' dredge overdepth allowance proposed for the
entire borrow area. Therefore, maximum proposed dredge depth for Zone 1 would be -28' NAVD88.
Zone 2 would be excavated to a design depth of -35' (+2') NAVD88 and Zone 3's proposed dredge depth
is -27' (+2') NAVD88. This is a change from the originally permitted dredge depths to account for
overdredge allowance not included in the original application for Zones 1 and 3 and dredge additional
depth in Zone 2. The sediment analysis has been updated for the site to account for the additional dredge
depth. The mean grain size for the Jay Bird Shoals borrow area, as reported based on a revised composite
of applicable vibracore samples within the newly proposed dredged depths, is 0.27mm. Gravel is reported
at 1.27%, granular material at 3.57%, fines at 4.61%, and calcium carbonate is now reported at 13.98%.
The applicant estimates the volume of material available in the Jay Bird Shoals site, after accounting for
material dredged during the upcoming 2020/21 project and the dredge buffers, is approximately 2.59
million cubic yards.
Updated wave & sediment transport modeling has also been reported for the modified template due to
concerns previously expressed by the Village of Bald Head Island and Town of Caswell Beach. The
updated modeling report can be found in Appendix D and a brief discussion of the results can be found in
Section 2.4 of the narrative (p. 45-47). Monitoring of the Caswell Beach shoreline would continue
annually for 3 years post -construction, in accordance with their previous commitment in the original
permit application, as stated on page 53 of the narrative and in Appendix G.
The proposed 180-acre Central Reach borrow area, located approximately 1.9 miles offshore of the Oak
Island shoreline, is reported to contain 1.18 million cubic yards of beach -compatible material. Up to
615,000 Cubic yards of material is proposed to be excavated at the targeted depths. The proposed Central
Reach borrow area partially overlaps the borrow area authorized for the Town of Holden Beach (State
Permit 414-02, SAW 2012-00286 and DWR Project 42001-1836, see Figure 2-2 in the narrative for both
borrow area locations). The Town of Oak Island's proposed Central Reach borrow area is divided into 4
zones of varying depth, all with a proposed +2' overdredge allowance. Zone 1 would target a dredge
depth of -38' NAVD 88 (+2'), Zone 2 would target a depth of 39.7' (+2') NAVD 88, and Zones 3 and 4
would target dredge depths of-37.3' (+2') and -40' (+2') NAVD 88, respectively. Vibracores taken from
the proposed Central Reach borrow area show a mean grain size of 0.32mm with an average composite
sand content of 86.53%. The average composite gravel content for material within proposed dredge
depths in this borrow area is 3.4%, the average granular content of 4.97%, average fines content is 5.09%
and average calcium carbonate is 16.17%. Sediment color in the borrow area was predominantly 10YR
3/1 when the vibracores were first analyzed and samples were later reassessed after a period of exposure
North Carolina Department of Environmental Quality Division of Coastal Management
Wilmington Office 127 Cardinal Drive Extension I Wilmington. North Carolina 28405
910196.7215

to the stun to estimate potential for bleaching (see pages 42-44 of the narrative and Appendix B2 for the
Central Reach vibracore logs). All samples within proposed dredge depths were reported at a Munsell
value of 10YR 5/1 or 6/1 while dry after time, but when reevaluated while wet, several samples still
remain the original darker 10YR 3/ 1 value (see page I of Appendix 132). No cultural resources were
identified in an Archeological Assessment performed in 2019 by Tidewater Atlantic Research, Inc. (see
Appendix E).
Dredging would be conducted either via a hopper dredge, with sediment transported to offshore
temporary mooring, then pumped by submerged pipeline onto the beach, or excavated via cutterhead
dredge and piped directly to the beach from the borrow area.
10. ANTICIPATED IMPACTS
The proposed dredging associated with the project would result in impacts to up to 484 acres of
submerged bottom state waters. Up to 304 acres would be dredged at Jay Bird Shoals and the proposed
Central Reach borrow area covers 180 acres. The project would result in the fill of approximately 63 acres
of upper beach (above MHW) and would fill approximately 134 acres of intertidal area and nearshore
shallow bottom. The dredging and beach fill would result in temporary increases in turbidity. Temporary
impacts to benthic and invertebrate infaunal communities can be expected. The applicant is proposing to
limit all dredging, sand placement and associated construction activities to the environmental window
between November 16 through April 30, thereby avoiding peak periods of biological activity. The
applicant has also committed to monitoring sand placement throughout the project to ensure material is
compatible and complies with State Technical Standards (15A NCAA07H .0312) through daily
inspections and weekly sediment analysis reports, as well as committing to utilizing existing permanent
beach accessways with heavy equipment and via existing public access corridors. The narrative states
they would locate staging areas for construction equipment off the beach in areas identified on the plans
(See Figure 2-17), but daily equipment staging would be located on the beach seaward of the dune line.
The narrative also states the applicant agrees to abide by many of the standard conditions as addressed in
Section 4 of the Narrative (Proposed Conservation Measures) and as included in the 2020 South Atlantic
Regional Biological Opinion (SARBO 2020).
Submitted by: Heather Coats Date: December 17, 2020 Office: Wilmington
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North Carolina Department of Environmental Quality i, Division of Coastal Management
Wilmington Office 127 Cardinal Drive Extension Wilmington, North Carolina 28405
910,796.7215

DIVISION OF COASTAL MANAGEMENT
FIELD INVESTIGATION REPORT
APPLICANT'S NAME: Town of Oak Island- Major Modification of Permit No. 31-20
2. LOCATION OF PROJECT SITE: The project site is located on Oak Island, from McGlamery St to SE
63rd St and from between 71 & IOth PL W to the West End Beach Access, Brunswick County.
Approximate State Plane Coordinates — Approx. Lat.- 33.902890' N (start)/ 33.912873' N (end)
Long: 78.074842' W (start) / 78.227846' W (end)
3. INVESTIGATION TYPE: CAMA / D&F
4. INVESTIGATIVE PROCEDURE: Dates of Site Visit— 8126/20,
Was Applicant Present — No
5. PROCESSING PROCEDURE: Application Received—11/25/20
Office — Wilmington
6. SITE DESCRIPTION:
(A) Local Land Use Plan — Town of Oak Island
(B) AEC(s) Involved: OH, PTA
(C) Water Dependent: Yes
(D) Intended Use: Public
(E) Wastewater Treatment: Existing — Municipal Sewer
Planned - N/A
(F) Type of Structures: Existing — Primarily residential structures and accessways
Planned — Dune construction and beach renourishment project
(G) Estimated Annual Rate of Erosion: 0'-2'/year SBF: 2'/year
HABITAT DESCRIPTION:
[AREA]
DREDGED FILLED OTHER
(A) Vegetated Wetlands (coastal)
(B) Other (Below MHW)
484 acres
--- 134 acres
(C) Other (Above MHW)
---63 acres
(H) Total Area Disturbed: —197 acres of beach fill
Primary Nursery Area: No
(I) Water Classification: SB Open: No
8. PROJECT SUMMARY: The applicant is proposing to expand their beach nourishment project to
include McGlarnery St to SE 63rd St and between 7th/IOth PL W to the West End Beach Access.
DFQ*
North Carolina Department of Environmental Quality 1 Division of Coastal Management
Wilintngton office ` 127 Cardinal Drive Extension I MlmingtoR, North Carolina 28405
914.796.721S

Town of Oak Island Beach Nourishment- Major Modification 431-20
Page Two
9. PROJECT DESCRIPTION:
The Town of Oak island is located on a south facing barrier island in Brunswick County between
Lock -woods Folly Inlet and the Town of Holden Beach to the west, and the Town of Caswell Beach and
the Cape Fear River to the east. The Town of Caswell Beach is also located on the island. The Town of
Oak Island is approximately 9 miles in length. It is also bordered by the Atlantic Intracoastal Waterway
(AIWW) to the north and the Atlantic Ocean to the south. The island is accessed via 2 bridges. The
western bridge leads into the Town of Oak Island located off NC Highway 211 via Middleton Blvd. The
eastern bridge leads onto the island between Oak Island and Caswell Beach and is accessed from NC
Highway 133.
This is a proposed modification to the Town's State CAMAIDredge & Fill Permit No. 31-20 which was
issued in early 2020 (USACE AID# SAW-2018-02230 and DWR Project 42018-1344). A minor
modification was issued shortly thereafter to potentially authorize the removal of a buffer in the borrow
area, should a reported magnetic anomaly be identified as marine debris and removed from the borrow
site. The proposed project would extend the previously permitted project to include the entire oceanfront
shoreline of the Town of Oak Island. The long-term erosion rate for the proposed project area ranges from
0'-2.6'/year. The Division's calculated 100-year storm recession line for the island was predicted to be
180'. Oak Island has experienced significant beach erosion within the last several years as a result of the
numerous recent tropical storms and hurricanes that have affected our coast.
In the original application, the permittee identified a —304 acre borrow site off Jay Bird Shoals to supply
sand for the project. Water depths at the site varied from approximately -20 to -28' NAVD88. Sediments
collected via Vibracore samples within the borrow site showed a Unified Soils Classification System
(USCS) designation of predominantly SP-SM or SW. Gravel sized material (?4.76mm) ranged from 0-
7% with a maximum composite weight of 4.25%. Fines (<0.0625 mm) in individual samples ranged from
1.29% to 9.87% with a maximum composite weight of 6.79% overall. A low -intensity, long -duration
linear feature was originally identified within the borrow site by a remote sensing survey and a minimum
50' buffer area on each side of the anomaly is proposed (see Appendix D- Archeological Remote Sensing
for more information). A follow-up Phase U Remote -Sensing Archeological Survey was later submitted
for inclusion in the application package and a request to remove the buffer was later submitted as a minor
modification request as the anomaly is believed to be modern debris. Dredge depths were divided into
three zones: Zone 1 with an excavation depth of -26' NAVD88, Zone 2 with an excavation depth of -31'
NAVD88, and Zone 3's permitted dredge depth was -27' NAVD88.
The previously permitted placement area extended from 10'h Place West to SE 63' Street (-21,000 feet).
The beach fill template included berm fill to an elevation of +7' NAVD 88 with a 20: 1 slope out to tie
into existing grade from -1' to -10' NAVD88 and a dune at an elevation ranging from 13.5' to 14.5'
NAVD88, constructed with a 6' wide dune crest, and at a 5:1 slope_ Excavation was calculated at 1.1
million cubic yards with an anticipated final net fill volume of approximately 846,000 cubic yards due to
expected dredge losses.
The native beach was characterized using data collected by Athena. Fines were calculated at 1.88%, with
sand comprising 98.96%, and granular and gravel material each at less than 1%. Mean grain size was
calculated at 0.27mm. Calcium carbonate was reported at 9.72%_ The count of shell and
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North Carolina Department of Environmental Quality ', Division of Coastal Management
Wilmington office ', 127 Cardinal Drive Extension I Wilmington, North Carolina 28405
910.796.7215

Town of Oak Island Beach Nourishment- Major Modification #31-20
Page Three
rock material greater than 3" in size was determined to number 58 within a 50,000 square foot area, as
previously determined during the original permit application.
Since the original beach nourishment project was permitted, Hurricane Isaias resulted in significant
erosion of the beach. In response, the Town's major permit for beach bulldozing was modified to allow
them to bulldoze the damaged dune system. This work has been completed. The Town is also repairing
dunes by replacing storm-overwashed sand lost from the beach and dune system via truck haul. This latter
work is exempt from CAMA permitting requirements as it is defined in the Coastal Resources
Commission (CRC) rules as maintenance and repair. This work is being conducted at the present time.
The waters in the project area fall within the Lumber and Cape Fear River Basins, as classified by the NC
Division of Water Resources (DWR). The waters of the Atlantic Ocean are classified as SB by the DWR.
The NC Division of Marine Fisheries has NOT designated any of the areas to be impacted as a Primary
NurseEy Area, and there are no foreseen impacts to shellfish resources at this time.
PROPOSED PROJECT:
The applicant is proposing to expand the limits of the previously permitted beach nourishment and dune
building project for the Town of Oak Island. The project site extends the distance of the previously
permitted project approximately 26,100 additional linear feet in total, with 2 reaches extending from
McGlamery St to SE 63rd St, and a second reach starting between 7" & 1 Oth PL W and extending to the
West End Beach Access. The beach berth would be filled to an elevation of +7' NAVD 88 with a 20: 1
slope out to tie into existing grade from -P to -9' NAVD88 (MLW= -2.9' NAVD88). An engineered
"starter dune" is also proposed along the majority of the expanded area with a maximum elevation
ranging from +13.0' to +1S.5' NAVD88, to be constructed with a 10' wide dune crest, and with a 4:1
slope on the waterward side and a 5.1 slope on the landward side. This design appears to advance the
proposed engineered dune to (or in one area waterward of) the current MHW line along part of the project
area. Anticipated fill volumes for the project would place a minimum of 15 with an average of SO cubic
yards per linear foot. As proposed, a gross excavated volume of up to 1,667 million cubic yards of sand
has been calculated to account for an estimated placement loss of up to 30%. A total fill volume of
approximately 1,282,000 cubic yards is anticipated to be placed on the beach, given current conditions. It
is currently estimated that 5,852,607 square feet would be filled below MHW (535,834 cubic yards)_ Of
that material, approximately 2,150,482 square feet (191,049 cubic yards) would also be located below
MLW. Approximately 2,740,996 square feet (746,166 cubic yards) of beach fill material would be placed
above the MHW line. The applicant also estimates approximately 93' of fill would be placed water -ward
of the current MHW line on average, within a maximum projected distance of 279' of fill placed below
MHW. A table provided by the applicant in the narrative (Table 2-3) shows the average pre -Matthew
beach width ranging from 57'-69', and the average anticipated post -construction equilibrated beach width
ranging from 73'-96'. However, it should be noted that the estimates provided are based on a single
"representative profile" for each area (4 profiles in total for the project area) and estimated equilibration
was simulated using SBEACH and a 2-year return period storm. While the applicant asserts the estimated
equilibrated recreational beach width (the distance between +7' NAVD88 to MHW) will increase the
beach width that existed prior to Hurricane Matthew, there appears to be potential for post -equilibration
narrowing of the beach width should Oak Island experience more than a 2-year storm.. The applicant has
also stated this project is the second phase of the Town's overall plan, and the Town still intends to apply
for a more comprehensive beach restoration project in the near future, but there is no apparent
North Carolina Department of Environmental Quality I Division of Coastal Management
Wilmington ofClce ; 127 Cardinal Brice Extension E Wilmington, North Carolina 28405
910.796.7215

Town of Oak Island Beach -Nourishment- Major Modification #31-20
Page Four
guarantee of future projects at this time; as stated in the narrative, future projects are dependent on
funding. The application states the purpose of the project, which is designed to withstand a 25-year return
period storm event, is to protect infrastructure and property while maintaining tax revenues to the Town,
County and State, as well as to preserve the environmental, cultural, and aquatic resources of the Town
and County. Planting of dune vegetation is also proposed on the crest and backslope of the proposed
started dune. This would likely facilitate the establishment of stable, natural vegetation. And while the
applicant states the importance of maintaining the pre -Matthew dune and location of stable, natural
vegetation to protect construction setbacks, the project design shifts the starter dune waterward of the
frontal dune's pre -Matthew location, as shown in the profile drawings included in Appendix J-
Supplemental Profiles and Figures 2-8 and 2-9 of the narrative (Project Stations 667+65 & 669+65).
The applicant states the entire volume of material will still be available in the previously permitted Jay
Bird Shoals site, as proposed, although they are also requesting to allow dredging from a second borrow
area at Central Reach. The Jay Bird Shoals site has been divided into three zones: Zone 1 would be
excavated to a depth of -26' NAVD88, with a proposed 2' dredge overdepth allowance proposed for the
entire borrow area_ Therefore, maximum proposed dredge depth for Zone 1 would be -28' NAVD88.
Zone 2 would be excavated to a design depth of -35' (+2') NAVD88 and Zone 3's proposed dredge depth
is -27' (+2') NAVD88. This is a change from the originally permitted dredge depths to account for
overdredge allowance not included in the original application for Zones 1 and 3 and dredge additional
depth in Zone 2. The sediment analysis has been updated for the site to account for the additional dredge
depth. The mean grain size for the Jay Bird Shoals borrow area, as reported based on a revised composite
of applicable vibracore samples within the newly proposed dredged depths, is 0.27mm. Gravel is reported
at 1.27%, granular material at 3.57%, fines at 4.61%, and calcium carbonate is now reported at 13.98%.
The applicant estimates the volume of material available in the Jay Bird Shoals site, after accounting for
material dredged during the upcoming 2020/21 project and the dredge buffers, is approximately 2.59
million cubic yards.
Updated wave & sediment transport modeling has also been reported for the modified template due to
concerns previously expressed by the Village of Bald Head Island and Town of Caswell Beach. The
updated modeling report can be found in Appendix D and a brief discussion of the results can be found in
Section 2.4 of the narrative (p. 45-47). Monitoring of the Caswell Beach shoreline would continue
annually for 3 years post -construction, in accordance with their previous commitment in the original
permit application, as stated on page 53 of the narrative and in Appendix G.
The proposed 180-acre Central Reach borrow area, located approximately 1.9 miles offshore of the Oak
Island shoreline, is reported to contain 1.18 million cubic yards of beach -compatible material. Up to
615,000 cubic yards of material is proposed to be excavated at the targeted depths. The proposed Central
Reach borrow area partially overlaps the borrow area authorized for the Town of Holden Beach (State
Permit #14-02, SAW 2012-00286 and DWR Project 92001-1836, see figure 2-2 in the narrative for both
borrow area locations). The Town of Oak Island's proposed Central Reach borrow area is divided into 4
zones of varying depth, all with a proposed +2' overdredge allowance. Zone I would target a dredge
depth of -38' NAVD 88 (+2'), Zone 2 would target a depth of 39_T (+2') NAVD 88, and Zones 3 and 4
would target dredge depths of -37.3' (+2') and -40' (+2') NAVD 88, respectively. Vibracores taken from
the proposed Central Reach borrow area show a mean grain size of 0.32mm with an average composite
sand content of 86.53%. The average composite gravel content for material within proposed dredge
depths in this borrow area is 3.4%, the average granular content of 4.97%, average fines content is 5.09%
and average calcium carbonate is 16.17%. Sediment color in the borrow area was predominantly 1 OYR
3/1 when the vibracores were first analyzed and samples were later reassessed after a period of exposure
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North Carolina Depar€rnent of Environmental Quality 1 Division of Coasta4 Management
Wilmington Office 1 127 Cardinal Drive Extension I Wilmington. North Carolina 28405
9€0.796,7215

to the sun to estimate potential for bleaching (see pages 42-44 of the narrative and Appendix B2 for the
Central Reach vibracore logs). All samples within proposed dredge depths were reported at a Munsell
value of 10YR 511 or 6/1 while dry after time, but when reevaluated while wet, several samples still
remain the original darker 1 OYR 3 I value (see page 1 of Appendix B2). No cultural resources were
identified in an Archeological Assessment performed in 2019 by Tidewater Atlantic Research, Inc. (see
Appendix E).
Dredging would be conducted either via a hopper dredge, with sediment transported to offshore
temporary mooring, then pumped by submerged pipeline onto the beach, or excavated via cutterhead
dredge and piped directly to the beach from the borrow area.
10. ANTICIPATED IMPACTS
The proposed dredging associated with the project would result in impacts to up to 484 acres of
submerged bottom state waters. Up to 304 acres would be dredged at Jay Bird Shoals and the proposed
Central Reach borrow area covers 180 acres. The project would result in the fill of approximately 63 acres
of upper beach (above MHW) and would fill approximately 134 acres of intertidal area and nearshore
shallow bottom. The dredging and beach fill would result in temporary increases in turbidity. Temporary
impacts to benthic and invertebrate infaunal communities can be expected. The applicant is proposing to
limit all dredging, sand placement and associated construction activities to the environmental window
between November 16 through April 30, thereby avoiding peals periods of biological activity. The
applicant has also committed to monitoring sand placement throughout the project to ensure material is
compatible and complies with State Technical Standards (15A NCAA07H .0312) through daily
inspections and weekly sediment analysis reports, as well as committing to utilizing existing permanent
beach accessways with heavy equipment and via existing public access corridors. The narrative states
they would locate staging areas for construction equipment off the beach in areas identified on the plans
(See Figure 2-17), but daily equipment staging would be located on the beach seaward of the dune line.
The narrative also states the applicant agrees to abide by many of the standard conditions as addressed in
Section 4 of the Narrative (Proposed Conservation Measures) and as included in the 2020 South Atlantic
Regional Biological Opinion (SARBO 2020).
Submitted by: Heather Coats Date: December 17, 2020 Office: Wilmington
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North Carolina Department of Environmental Quality I Dtvis€on of Coastal Management
W €mington Office 1 127 Cardinal Drive Extension f Wilmington, North Carolina 28405
910.796.7215

ROY COOPER NORTH CAROLINA
GOV2rlI0Y EnArol!mentaf.Qlla9ly
h4ICHAEL S. REGAN
Secretary
BRAXTON C. DAVIS
DUwaer December 18, 2020
Mr_ Johnny Martin
Moffatt & Nichol
4700 Falls of Neuse Road, Suite 300
Raleigh, NC 27609
Dear Mr_ Martin:
The Division of Coastal Management hereby acknowledges receipt of your application, acting as agent for the
Town of Oak Island, for State approval to expand the Town of Oak Island's beach nourishment project, with
the expanded location extending from McGlamery St to SE 63rd St_ and between 7th/I Oth PL W to the West
End Beach Access, in Oak Island, Brunswick County, and adjacent to the Atlantic Ocean. It was received as
complete on 11/25/20 and appears to be adequate for processing at this time_ The projected deadline for
snaking a decision is 2/8/21. An additional 75-day review period is provided by law when such time is
necessary to complete the review. If you have not been notified of a final action by the initial deadline stated
above, you should consider the review period extended_ Under those circumstances, this letter will serve as
your notice of an extended review. However, an additional letter will be provided on or about the 75th day.
If this agency does not render a permit decision within 70 days from 11/25/20 you may request a meeting with
the Director of the Division of Coastal Management and permit staff to discuss the status of your project. Such
a meeting will be held within five working days from the receipt of your written request and shall include the
applicant and project designer/consultant.
NCGS 113A-I 19(b) requires that Notice of an application be posted at the location of the proposed
development. Enclosed you will find a "Notice of Permit Filing" postcard which must be posted at the property
of your proposed development. You should post copies of this notice at a conspicuous point along the project
area where it can be observed by the public_ Failure to post this notice could result in an incomplete
application.
An onsite inspection will be made, and if additional information is required, you will be contacted by the
appropriate State or Federal agency. Please contact me if you have any questions and notify me in writing if
you wish to receive a copy of my field report and/or comments from reviewing agencies.
Sincerely,
IkAtA" 60�r&
Heather Coats
Beach & Inlet Management Project Coordinator
CC" MHC Files, DCM David Kelly, Town of Oak Island
Greg Currey, COE Dawn York, Moffatt & Nichol
North Carolina Department of Environmental Quality I Division.. of Coastal Management
Wilmington Office 1 127 cardinal Drive Extension I Wilmington, North Carolina 28405
910.796.7215

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NORTH CAROLINA
Environmental Duatin-
December 18, 2020
[e-mail]
2 Pages
Star News
Legal Advertisement Section
Post Office Box 840
Wilmington, North Carolina 28402
Re: Major Public Notice in Brunswick County
• Town of Oak Lsland
ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
BRAXTON DAVIS
Director, Division of Coastal Management
Hello Angie: Please publish the attached Notice in the Thursday, December 24, 2020 issue.
The State Office of Budget & Management requires an original Affidavit of Publication prior to payment for
newspaper advertising.
Please send the original affidavit and invoice for payment to Tanya Pietila at the NC Division of Coastal
Management, 127 Cardinal Drive Extension, Wilmington, NC 28405, 910-796-7226. Paying by credit card to the
attention of Jarimy Springer.
Please email a copy of the credit card receipt to me.
Thank you for your assistance in this matter. If you should have any questions, please contact me at our
Wilmington office.
Sincerely,
Pietila
Support & Customer Assistance
cc: WIRO File — Curt Weychert
USACE
State of North Carolina J Environmental Quality I Coastal Management
127 Cardinal Drive Ext., WOmington, NC 28405 919 796 7215

NOTICE OF FILING OF
APPLICATION FOR CAMA MAJOR
DEVELOPMENT PERMIT
The Department of Environmental Quality hereby gives public notice as required by NCGS 113A-
119(b) that the following application was submitted for a development permit in an Area of Environmental
Concern as designated under the CAMA: On December 17, 2020, the Town of Oak Island proposed to
expand their beach nourishment project to include McGlamery St. to SE 63rd St and between 7h/10rh
PL W to the West End Beach Access, adj to the Atlantic Ocean in Oak Island, Brunswick County. A
copy of the application can be examined or copied at the office of Heather Coats, N.C. Dept. of
Environmental Quality, Division of Coastal Management, 127 Cardinal Drive Ext., Wilmington, NC
28405, (910-796-7302) during normal business hours.
Comments mailed to Braxton C. Davis, Director, Division of Coastal Management, 400 Commerce
Avenue, Morehead City, NC 28557-3421, prior to January 14, 2021 will be considered in making the
permit decision. Later comments will be accepted and considered up to the time of permit decision. Project
modification may occur based on review and comment by the public and state and federal agencies. Notice
of the permit decision in these matters will be provided upon written request.

NORTH CAROLINA
Environmental Oualitr
December 18, 2020
MEMORANDUM:
FROM: Curt Weychert, Assistant Major Permits Coordinator
NCDEQ - Division of Coastal Management
400 Commerce Avenue, Morehead City, NC 28557
Fax: [phone] (Courier 11-12-09)
curt.weychert(a)NCDEN R.gov
SUBJECT: CAMA/Dredge & Fill
Applicant: Town of Oak Island
ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
BRAXTON DAVIS
Director, Division of Coastal
Management
Project Location: McGlamery St. to SE 63rd St. and between 7th/10th PL W to the West End Beach
Access, adj. to the Atlantic Ocean in Oak Island, Brunswick County
Proposed Project: Proposal to expand beach nourishment project to include McGlamery St. to SE 63rd
St. and between 7th/10th PL W to the West End Beach Access
Please indicate below your agency's position or viewpoint on the proposed project and
return this form to Curt Weychert at the address above by January 14, 2021. If you have any questions
regarding the proposed project, contact Heather Coats at [phone] when appropriate, in-depth
comments with supporting data is requested.
REPLY: This agency has no objection to the project as proposed.
**Additional comments may be attached**
This agency has no comment on the proposed project.
PRINT NAME
AGENCY
SIGNATURE
DATE
This agency approves of the project only if the recommended changes
are incorporated. See attached.
This agency objects to the project for reasons described in the attached comments.
State of North Carolina I Environmental Quality I Coastal Management
127 Cardinal Drive Ext., Wilmington, NC 28405 919 796 7215

Major Permit Fee Schedule
6wh
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Project Name: Mp-i- County: Check No & Amount:
�00,V, �tjjav� Of' 0i;\Ov\ 10 I-C� I
DCM %
DWQ %
Development Type
Fee
(14300160143510009316256253)
(2430016024351000952341)
t. Private, non-commerciai development
that does not involve the filling or
$250
100% ($250)
0% ($0)
excavation of any wetlands or
open water areas:
11. Public or commercial development that
does not involve the filling or excavation
$400
100% ($400)
0% ($0)
of any wetlands or open water areas:
III, For development that involves the
filling and/or excavation of up to 1 acre
of wetiands and/or open wafer areas,
determine if &B, C, or D below applies:
fil(A). Private, non-commercial
development, it General Water Quality
$250
100% ($250)
0% ($0)
Certification No 4175 can be applied:
I11(B). Public or commercial development,
if General Water Quality Certification
$400
100% ($400)
0% ($0)
No. 4175 can be applied
lll(C). If General Water Quality
Certification No. 4175 could be applied,
but DCiN staff determined that additional
$400
60% ($240)
40% ($160)
review and written DWQ concurrence is
needed because of concerns related to
water quality or aquatic life-
111(D). If General Water Quality
$400
60% ($240)
40% ($160)
Certification No. 4175 cannot be applied:
IV Developrnent that involves the f4s.
and/or excavation of more than one$47501V
60% ($285)
40% ($190)
of wetlands and/or open water are
ly ,