129-16 Minor Mod 2024 Dare County

Permit Class
MODIFICATION/MINOR
Permit Number
129-16
STATE OF NORTH CAROLINA
Department of Environmental Quality
and
Coastal Resources Commission
Vermit
for
X Major Development in an Area of Environmental Concern
pursuant to NCGS I I3A-118
X Excavation and/or filling pursuant to NCGS 113-229
Issued to Dare County, 954 Marshall C. Collins Drive, Manteo, NC 27954
Authorizing development in Hyde/Dare County at Pamlico Sound and Hatteras Inlet complex
adj. to the NE tip of Ocracoke Island, as requested in the permittee's letter dated 4/12/24, including
workplan drawings (2), Sheet 1 dated 4/3/24 and Sheet 2 dated 2/23/24.
This permit, issued on July 12, 2024 , is subject to compliance with the application (where consistent
with the permit), all applicable regulations, special conditions and notes set forth below. Any violation of these terms may
be subject to tines, imprisonment or civil action; or may cause the permit to be null and void.
1) Unless specifically altered herein, this Minor Modification allows year-round dredging to be
conducted and authorizes additional disposal areas, all as expressly and specifically set forth in the
attached modification request and workplan drawings. [07J .0202(c)]
2) In accordance with commitments made by the permittee and in order to minimize impacts to
submerged aquatic vegetation (SAV) habitat, all excavation and disposal activities shall maintain a
minimum distance of 300' from any known SAV beds when dredging from April 1 through
September 30, and a minimum distance of 100' from any known SAV beds from October 1 through
March 31. [07H .0208(b)(1)]
(See attached sheets for Additional Conditions)
This permit action may be appealed by the permittee or
other qualified persons within twenty (20) days of the issuing
date.
This permit must be accessible on -site to Department
personnel when the project is inspected for compliance.
Any maintenance work or project modification not covered
hereunder requires further Division approval.
All work must cease when the permit expires on
December 31, 2025
In issuing this permit, the State of North Carolina agrees
that your project is consistent with the North Carolina Coastal
Management Program.
Signed by the authority of the Secretary of DEQ and the Chair
of the Coastal Resources Commission.
Pro MW
NOW
For Tancred Miller, Director
Division of Coastal Management
This permit and its conditions are hereby accepted.
Signature of Permittee

Dare County
Permit No. 129-46
Page 2 of 3
ADDITIONAL CONDITIONS
Nearshore Hatteras and Ocracoke Islands Dredge Disposal Template
3) All disposal of excavated materials shall take place entirely within the area(s) indicated on the attached
workplan drawings. Any proposal to modify the disposal location(s) may require a modification of this
permit. [07J .0202(c)]
Estuarine Waters AEC Disposal Template
4) All disposal of excavated materials outside of the approved nearshore disposal areas referenced above
shall take place entirely within the area shown as "Hatteras Inlet Flood Channel Open Water
Placement Area A", as indicated on the attached workplan, Sheet 1 dated 4/3/24. Any disposal outside
the authorized disposal locations shall require a permit modification. [G.S. 113-229(e); 07H .0207(d);
07H .0208(a)(1)]
5) The permittee shall conduct post -deployment bathymetric surveys of the "Hatteras Inlet Flood
Channel Open Water Placement Area A" to confirm that work did not result in post -disposal
elevations shallower than -12 feet at MLLW. The surveys shall be provided prior to quarterly progress
meetings. Post -disposal depths shallower than -12 feet at MLLW shall be reported to DCM immediately.
[G.S. 113-229(e)]
6) Any monitoring reports submitted to the U.S. Army Corps of Engineers shall be provided to the
Division of Coastal Management. [07J .0202(c)]
NOTE: In order to reduce potential for increased turbidity within the estuarine waters of Hatteras Inlet,
the permittee is encouraged to dispose of dredge material within the "Hatteras Inlet Flood
Channel Open Water Placement Area A" on outgoing tides.
General
7) No attempt shall be made by the permittee to prevent the full and free use by the public of all navigable
waters at or adjacent to the authorized work. [07H .0208(a)(2)(G)]
8) The permitted activity shall not cause an unacceptable interference with navigation and shall not exceed
the dimensions shown on the attached permit drawings. [07H .0208(a)(2)(G)]
9) All conditions and stipulations of the active permit remain in force under this Minor Modification
unless specifically altered herein. [07J .0209(a)]
NOTE: This Minor Modification shall be attached to the original of Permit No. 129-16, which was
issued on 12/20/16, as well as all subsequent modifications and renewals, and copies of all
documents shall be readily available on site when a Division representative inspects the project
for compliance.
NOTE: This permit does not eliminate the need to obtain any additional state, federal or local permits,
approvals or authorizations that may be required.

Dare County
Permit No. 129-46
Page 3 of 3
NOTE: A permit renewal application processing fee of $100 was received by DCM for this project.
NOTE: The N.C. Division of Water Resources has authorized the proposed project under DWR Project
No. 13-1279.
NOTE: The U.S. Army Corps of Engineers authorized the proposed project under COE Action Id. No.
SAW-2016-02140.

_111-�
COASTAL
PROTECTICM
ENSINEERING
April 12, 2024
Joshua Pelletier
U.S. Army Corps of Engineers
Washington Regulatory Field Office
2407 West Fifth Street
Washington, NC 27889
Heather Coats
North Carolina Division of Coastal Management
Beach & Inlet Management Project Coordinator
127 Cardinal Drive
Wilmington, NC 28405
Brad Rosov
Project Manager/Senior Marine Biologist
Coastal Protection Engineering of North Carolina, Inc.
4038 Masonboro Loop Road
Wilmington, North Carolina
Tel: [phone]
[e-mail]
Re: Request for a Modification to Dept. of Army Individual Permit #2016-02140 and CAMA Major
Permit #129-16 for the Inclusion of Additional Disposal Areas and Operation on a Year -Round
Basis
Dear Mr. Pelletier and Ms. Coats,
As you are aware, the Division of Coastal Management (DCM) issued CAMA Major Permit (#129-16)
on December 20, 2016 and the United States Army Corps of Engineers (USACE) issued a Department
of Army (DoA) Individual Permit #SAW-2016-02140 on March 1, 2017 to Dare County for the County's
proposed Hatteras Inlet Channel Maintenance Project (also known as the "Hatteras Connector Channel
Maintenance Project"). Prior to the issuance of permits, an interagency scoping meeting was held on
August 16, 2016. As stated in the permit application package, Dare County was seeking permits that would
allow for the utilization of USACE dredges to conduct maintenance dredging within Hatteras Connector
Channel to reestablish the navigability from Ocracoke Island and Hatteras Island into Hatteras Inlet.
Dredging activities would be performed by USACE-owned dredge plants (sidecast dredge and special
purpose dredges) within a 150' wide channel excavated to -12 ft. MLW depths from within the proposed
Hatteras Connector Channel corridor. Material excavated by a special purpose dredge would be disposed
in a nearshore disposal site in the Atlantic Ocean just south of Ocracoke Island which had been previously
authorized for use by the USACE. The permits issued to Dare County for this action specified that
dredging would not be permissible outside the environmental dredge window of April 1 to September 30
without prior approval from the DCM and the United States Army Corps of Engineers (USACE) in
consultation with appropriate resource agencies.

The USACE issued a modification to DoA Permit #SAW-2015-02140 on March 5, 2018 allowing for 1)
a one-time open water disposal of up to 500 cubic yards of material; 2) the widening of the permitted
channel width from 150 ft. to 200 ft., and 3) a modification of the extent of the dredge corridor following
a cultural resources survey. A minor permit modification to the CAMA Major permit was issued by DCM
on March 14, 2018 allowing for these same actions.
On January 22, 2020, the CAMA Permit #129-16 was renewed and remains valid through December 31,
2024. The DoA Individual Permit #SAW-2016-02140 remains valid through March 1, 2027.
In the spring of 2020, Dare County requested permit modifications allowing for the North Carolina
Department of Transportation's (NCDOT) cutterhead pipeline dredge to perform a one-time event to
dredge a channel 200 feet wide to a depth of -12 feet mean low water (MLW) within the permitted dredge
corridor with disposal of the dredged material at the NCDOT upland disposal site at the north end of
Ocracoke Island, Hyde County, North Carolina. The modification request also included relief from the
dredge moratorium such that dredge could operate through June 15, 2020. DCM subsequently issued a
minor permit modification on April 3, 2020 and the USACE modified the County's DoA permit on May
4, 2020.
A third minor modification to the CAMA Major permit was issued by DCM on January 18, 2022 allowing
for the use of the dredge Miss Katie to perform the same dredging operations (including sidecast dredging
to create a "pilot" channel) within the Hatteras Connector Channel dredge corridor as already permitted
for the specified USACE dredges. The USACE issued a modification to the DoA permit allowing for the
same action on March 14, 2022.
In early spring 2022, shoaling patterns shifted in the Hatteras Inlet area causing the original commonly
used route from Sloop Channel to Hatteras Connector Channel to fill in. A new natural deep -water route
was revealed to the north of the County's permitted dredge corridor. Based on feedback provided by the
US Coast Guard (USCG), the conditions within this northern channel were determined to be better suited
for successful and safe navigation and should be considered the preferred channel location targeted for
maintenance dredging. Although this channel was in better condition than the previously used connector
channel, emergency dredging within several "pinch points" was required for the USCG and mariners to
access the Hatteras Inlet gorge. With this in mind, the County requested a fourth modification to their
permits to allow for maintenance dredging to commence by the Merritt outside of the environmental
dredge window and within a 500'-long segment that extended beyond the permitted channel corridor.
DCM and USACE issued the requested permit modifications on April 1, 2022 granting relief from the
environmental dredge window and allowing for maintenance dredging outside of the established dredge
corridor.
Since this time, the "best water" connecting Sloop Channel to the Hatteras Connector Channel has
remained within the channel running primarily north of the permitted dredge corridor. In order to maintain
navigation through this area, Dare County sought a fifth modification to their existing permits to expand
the extent of the permitted dredging corridor by 149 acres to include this new "northern" channel. The
channel within this area would be maintained to 200-foot-wide to a depth of -12' MLW; the same
dimensions described in the County's existing permits. DCM and the USACE issued permit modifications
for the expansion of the dredge corridor on December 8, 2022 and January 11, 2023, respectively.
To date, a total of fifteen maintenance dredging events have occurred under the County's permits.

Proposed Permit Modifications
As described above, the County's existing permits allowing for the maintenance of the Hatteras Connector
Channel include the ability to dispose of material within the Ocracoke Island Nearshore Placement Area
and via sidecasting. This letter serves as a request to modify USACE Individual Permit #SAW 2016-
02140 allowing for the use of two additional disposal areas and a modification to the existing Ocracoke
Island Nearshore Placement Area. Specifically, the proposed additional disposal areas include 1) the
Hatteras Inlet Flood Channel Open Water Placement Area and 2) the Hatteras Island Nearshore Placement
Area. Both open water disposal areas, shown on the attached drawings, were recently approved for use
under permits obtained by Dare County allowing for maintenance dredging within the "Horseshoe Route"
in proximity to Hatteras Inlet under CAMA Major Permit #147-23 and USACE Individual Permit #SAW-
2023-01122. These modifications will improve safe and efficient dredge operations whereby providing
dredge operators with more options for disposal depending on sea conditions. Furthermore, the inclusion
of the Hatteras Island Nearshore Placement Area also provides the County the opportunity to provide
additional sand to the nearshore area off Hatteras Island to mitigate erosion of the oceanfront beach. In
addition, the County is requesting that the dredging moratorium between April 1 to September 30 be
removed to align with the USACE's authorization which allows for year-round dredging within the
Hatteras Connector Channel.
Addition of the Hatteras Inlet Flood Channel Open Water Placement Area
In early March, Miss Katie experienced challenges navigating through the Hatteras Inlet ocean bar channel
on its way to the Ocracoke Island Nearshore Disposal Area after performing maintenance dredging within
the Hatteras Connector Channel. On occasions where the USACE dredges Murden and Currituck have
performed work under this permit, similar limitations on ocean bar conditions resulted in delays due to
the vessels inability to safely navigate across the ocean bar channel. With the ability for special purpose
dredges to reliably navigate through the ocean bar channel compromised at times due to high seas and
shallow waters, the County is seeking to modify their permits for the inclusion of the Hatters Flood
Channel Open Water Placement Corridor which is located within the deep waters of the main flood
channel in the Hatteras Inlet complex. This channel, shown on the attached drawings, extends northward
from the ocean bar channel where it fans out into smaller channels. The location of this dynamic channel
has oscillated towards the east and west over the past several decades. Tidal waters through this channel
are swift and have created deep scour areas along the bottom. Based on a USACE bathymetric survey
conducted on March 27, 2023 the Hatteras Inlet Flood Channel Open Water Placement Corridor, as
depicted in the Permit Drawings submitted to DCM for use within the Southern Dare County Maintenance
Dredging and Management of Dredged Material Project, includes 203.4 acres (8,860,833 sq ft) and
includes waters as deep as -43' MLLW (Figure 1 and Attachment 1). This is the same footprint that was
recently permitted under CAMA Major Permit #147-23 and USACE Individual Permit #SAW-2023-
01122. Using updated bathymetry collected by the USACE on February 22, 2024, the County has
identified a discrete deep -water area (deeper than -18' MLLW) within this corridor for placement of
dredged material. This area, labeled "Hatteras Inlet Flood Channel Open Water Placement Area A" in the
revised work plan drawings (Attachment 1), has a capacity of 319,400 cy of dredged material based on
disposal within depths below -12 ft MLLW. The final post -disposal elevation will be no shallower than -
12 MLLW. No SAV resources are within approximately 5,000 ft from these areas based on the most
recent APNEP SAV assessment utilizing aerial imagery collected in 2020.

Figure 1. Location of the Hatteras Inlet Flood Channel Open Water Placement Area

A concern associated with the disposal of dredged material is its effect on water quality, particularly
concerning turbidity and sedimentation at the dredge site and the disposal site. When sediment re -
suspension occurs, larger particles will likely settle out; however, the finer sediments will remain
suspended for longer periods, or even indefinitely in turbulent water (Adriaanse and Coosen, 1991).
Suspended particles may interfere with the biological functions of some organisms such as feeding,
respiration, reproduction and potentially cause predator avoidance. High turbidity and silt loads can have
detrimental impacts to filter feeding organisms associated with nearshore benthic communities including
amphipods, isopods, decapods, polychaetes, mollusks and others. The conditions of diminished light
penetration can detrimentally affect the photosynthetic activity of phytoplankton, the primary producers
of energy production. In general, the area to be dredged within the Hatteras Connector Channel Corridor
is composed of sand with low organics and biological oxygen demand. Therefore, re -suspended material
is expected to have a quicker settling time, and have no appreciable effects on the dissolved oxygen, pH
or temperature. Additionally, the tidal exchange within inlet allows adequate mixing with oxygen rich
ocean waters. Accordingly, it is anticipated that disposing of dredged material would have only minor
impacts to the estuarine water column within the Hatteras Inlet Flood Channel Open Water Placement
Area. Furthermore, swimming marine organisms including fin fish are not anticipated to be impacted by
elevated turbidity levels during the disposal of material within the placement area due to their mobility
and the rapid settling rate of the sandy dredged material.
Benthic resources residing directly within the disposal area may be smothered by the sandy material.
These invertebrates provide structural fish habitat via the development of worm tubes, burrows and
depressions and provide a foraging base for demersal feeders. Because of the opportunistic nature of some
of the opportunistic benthic organisms, recovery may be expected to begin relatively rapidly in the order
of less than 100 days from the migration of benthic organisms from adjacent areas and larval transport
(Boyd and Rees, 2003; Newell et al., 2004). Benthos found in sand bottoms of high-energy environments,
such as those in proximity to Hatteras Inlet, tend to recover more quickly than those occurring in lower -
energy environments with a higher percentage of fine particles (Normandeau Associates Inc., 2014).
Faster recovery in shallow high-energy environments may reflect the adaptation of communities that occur
in these habitats to frequent disturbance from episodic storm events (Normandeau Associates Inc., 2014).
With the expected relatively quick recovery of infaunal communities, the project is not expected to result
in significant long-term impacts to benthic prey resources.
Addition of the Hatteras Island Nearshore Placement Area
Along with the Hatteras Inlet Flood Channel Open Water Placement Area, Dare County also holds permits
for the use of the Hatteras Island Nearshore Placement Area under CAMA Major Permit #147-23 and
USACE Individual Permit #SAW-2023-01122. In addition, the 2004 Use of Government Plant to Dredge
in Federally Authorized Navigation Projects in North Carolina EA/FONSI and the 2022 Hatteras -to -
Hatteras Inlet Channel Realignment EA/FONSI gives the USACE Civil works the authority to utilize this
placement area as well. As described in the 2022 EA/FONSI, this placement area spans 3,400 ft and is
located approximately 1,500 ft southeast of the southwest end of Hatteras Island (Figure 2 and Attachment
1). As stated in the USACE's 2022 EA/FONSI, "It is believed that placement in both locations (Hatteras
Island and Ocracoke Island Nearshore Placement Areas) will help to protect the adjacent beaches by acting
as a wave energy dissipator and/or to distribute the beach quality dredged material onto the beaches,
offering erosion protection. With this in mind, Dare County is now requesting the ability to place dredged
material obtained from the Hatteras Connector Channel within the confines of Hatteras Island Nearshore
Disposal Area.

Figure 2. The location of the Hatteras Island Nearshore Placement Area and the Hatteras Connector Channel
Corridor.
The USACE has historically placed dredged material within the Hatteras Island and Ocracoke Island
Nearshore Placement Areas in waters approximating -14 ft MLLW in an attempt to keep the dredged
material within the depth of closure and within an area where hopper dredges could safely operate
(Bullock, pers. comm 2019). The County is requesting the ability for special purpose dredges (Murden,
Currituck, and Miss Katie) or a similarly designed privately owned special purpose dredge to place
material within -I I ft MLLW to -17 ft MLLW. This will keep the dredged material as close to shore as
possible while maintaining safe operations by ensuring that the vessel does not strike the bottom when
seas are greater than 3 feet. Even at -17 ft MLLW, the material would be expected to remain within the
depth of closure and therefore the material would have the ability to routinely be exchanged between
nearshore bars and the beach. The USACE evaluated the potential for onshore movement of deposited
material off Pea Island, NC through numerical modeling simulations. The study found that 27% of the
deposited material disposed in -I I ft MLW would move onshore each year whereas in the case of the -17-
foot MLW placement depth, the USACE predicted 25% onshore movement each year (USACE, 1982).
Based on this study, the applicant concludes that there was no noticeable difference in cross -shore
transport at these two differing depths so long as the material is deposited within the depth of closure.
Previous engineering studies have determined the depth of closure in proximity to Hatteras Inlet and other
areas along the Outer Banks of North Carolina. Based on an analysis of survey data, the mean depth of
closure at Oregon Inlet, Nags Head, and Buxton, NC was determined to be -25.9 ft Mean Sea Level, -32.8
ft Mean Sea Level, and -28.5 ft Mean Sea Level, respectively (Barrineau et al., 2021). Accordingly,
material placed by special purpose dredges (Currituck, Murden, Miss Katie or a similarly designed
privately owned special purpose dredge) in -17 ft MLLW in the Hatteras Island Nearshore Placement Area
would presumably also be within the depth of closure. Therefore, based on the results of the 1982 USACE

study, material placed in -17 ft MLLW would be expected to behave similarly as material historically
placed by the USACE within the slightly shallower waters of -14 ft MLLW. By targeting sand placement
as close to shore as safely as possible and placing material in water depths shallower than the depth of
closure, the dredged sediments placed in these locations will benefit the adjacent beaches through the
addition of beach quality sand, mitigating erosion. See the revised work plan drawings in Attachment 1
for additional details of this proposed nearshore placement area.
As stated above, the disposal of dredged material may result in impacts to water quality (turbidity) and
benthic resources. However, these impacts are anticipated to be temporary and minor.
Modification to the Ocracoke Island Nearshore Placement Area
Dare County's existing CAMA Major Permit (#126-19) for the maintenance of the Hatteras Connector
Channel allows for the placement of dredged material within the confines of the Ocracoke Island
Nearshore Placement Area. This placement area, which spans approximately 4,000 linear feet
approximately 1,500m from the north end of the island, has also been used historically by the USACE
Civil Works as authorized through its 2004 Use of Government Plant to Dredge in Federally Authorized
Navigation Projects in North Carolina EA/FONSI and is also permitted under the County's CAMA Major
Permit #147-23 and USACE Individual Permit #SAW-2023-01122. The County's CAMA Major Permit
application and Environmental Assessment (EA) for the Hatteras Connector Channel project states that
material placed within Ocracoke Island Nearshore Placement Area will occur "in approximately -10 ft
MLW depths", however the workplan drawings cited in CAMA Permit # 126-19 do not indicate a specified
depth for disposal. As described in the previous section of this letter, by targeting sand placement as close
to shore as safely as possible and placing material in water depths shallower than the depth of closure, the
dredged sediments placed in these locations will benefit the adjacent beaches through the addition of beach
quality sand, mitigating erosion. Therefore, the County is also requesting that placement may occur within
the Ocracoke Island Nearshore Placement Area in depths ranging between -11 ft MLLW to -17 ft MLLW
based on the same rationale provided above under the request for the use of the Hatteras Island Nearshore
Placement Area. See the revised work plan drawings in Attachment 1 for additional details of this
proposed nearshore placement area.
Removal of the Dredge Moratorium
Special Condition #15 within Dare County's Dept. of Army Permit #SAW-2016-02140 allows for
maintenance dredging within the Hatteras Connector Channel states "In order to protect threatened and
endangered species and to minimize adverse impacts to offshore, and intertidal resources, no excavation
activities, including mobilization and demobilization, shall occur from April 1 to September 30 of any
year without notification to the Corps of Engineers Regulatory Division in coordination with the
appropriate resource agencies". Since the issuance of permits, Dare County has requested relief from the
dredge moratorium on three occasions due to shoaling that occurred within the Hatteras Connector
Channel which impeded the safe passage of vessels. No significant impacts were observed or reported as
a result of these operations. The USACE reports that since 2017, 50% of shoaling that resulted in the need
for dredging occurred during the dredge moratorium timeframe. Maintaining navigability in the summer
months is most important since tourism triples the population on Ocracoke and Hatteras islands between
the months of May and September. Performing maintenance dredging within the channel immediately
prior to the tourist season, as Dare County has attempted to do over recent years, does not guarantee the
channel will remain open throughout this period (USACE, 2022).
In 2022, the USACE received authorization to perform the Hatteras to Hatteras Inlet Realignment Project
which includes maintenance dredging within the Hatteras Connector Channel. While dredging within
other channels included within this authorization abide by the April 1 to September 30 dredge moratorium,
Sloop Channel North and the Hatteras Connector Channel, are exempt and are allowed to be maintained

on a year-round basis due to high rates of shoaling that occur throughout the year (USACE, 2022). With
this in mind, Dare County is requesting that their permit be modified to remove the requirement to abide
by the seasonal dredge moratorium such that it is aligned with the USACE's authorization. By doing so,
the process by which relief must be requested and approved can be foregone, saving valuable time while
improving safety by preventing groundings within the channel.
In order to minimize any impacts to SAV resources, the County will continue to abide by the condition in
CAMA Major Permit #129-16 that requires adherence to a 100' "no -dredge" buffer from any known SAV
resources when dredging between October through March. In addition, the County will propose to
increase the buffer to 300' when performing dredging operations between April and September in
alignment with the same obligations the USACE Civil Works has made under their authorization for the
Hatteras to Hatteras Inlet Realignment Project. Furthermore, the County will continue to provide agencies
with project reports following each maintenance event as required by Condition #24 and will work with
the Wilmington District USACE Civil Works group to update information for the tracking of maintenance
operations as part of the Hatteras Inlet Management Plan (HIMP).
Dare County respectfully requests that DCM and the USACE consider these modifications to help ensure
that the Hatteras Connector Channel can be managed in the most efficient and safe manner possible.
Please feel free to contact me any time should you have any questions or concerns.
Sincerely,
COASTAL PROTECTION ENGINEERING OF NORTH CAROLINA, INC.
Brad Rosov
Senior Marine Biologist

Attachment 1: Revised Work Plan Drawings

NOT FOR CONSTRUCTION
FOR REGULATORY REVIEW ONLY
hrk, 49"!
OCRACOKE
ISLAND
m
`a
4
0 1600 3200
GRAPHIC SCALE IN FT
HATTERAS INLET FLOOD CHANNEL
OPEN WATER PLACEMENT AREA A
COORDINATE TABLE
POINT ID
EASTING
NORTHING
ELEVATION
1
2967000.00
541871.62
-16.0
2
2967061.35
541385.48
-16.0
3
2967041.40
541022.16
-16.0
4
2967556.84
540742.67
-16.0
5
2967548.72
540537.70
-16.0
6
2967696.29
540362.77
-16.0
7
2967660.93
540135.28
-16.0
8
2966454.83
541286.36
-16.0
9
2966545.82
541330.61
-16.0
10
2966387.16
541644.48
-16.0
11
2966499.92
541800.31
-16.0
12
2966642.07
541709.18
-16.0
0
m
m
n
a
Sol3 EN
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N
11 A a O v2
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BATHYMETRIC
1 CONTOURS LOCATED INSIDE OF SOLID WHITE LINE AREA
W
GENERATED FROM SURVEY DATA COLLECTED BY THE USACE WILMINGTON
z
w
DISTRICT MARCH 27, 2023 AND REFERENCE TO MLLW
J
' Z
2. BATHYMETRIC DATA LOCATED OUTSIDE OF THE SOLID WHITE LINE AREA
a
a
WAS COLLECTED BY THE USACE WILMINGTON DISTRICT FEBRUARY 22, 2024
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Ho
a
w
za
AND REFERENCE TO MLLW.
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3. PLACEMENT OF DREDGE SPOIL MATERIAL FROM THE CONNECTOR CHANNEL
V
n
WILL BE PERMITTED IN THE PROPOSED HATTERAS INLET FLOOD CHANNEL
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G
OPEN WATER PLACEMENT AREA A, THE OCRACOKE ISLAND NEARSHORE
�
a
a
DISPOSAL LOCATION, AND THE HATTERAS ISLAND NEARSHORE PLACEMENT
o
AREA
0
U
4. THE MATERIAL PLACED WITHIN THE HATTERAS INLET FLOOD CHANNEL OPEN
WATER PLACEMENT AREA A WILL RESULT IN A POST -DISPOSAL ELEVATION
DRAWING NO.
NO HIGHER THAN -12' MLLW SUCH THAT NAVIGATION WILL NOT BE IMPEDED.
5. MATERIAL PLACED WITHIN THE OCRACOKE ISLAND NEARSHORE PLACMENT
SHEET-1
AREA AND THE HATTERAS ISLAND NEARSHORE PLACEMENT AREA WILL
OCCUR WITHIN THE -11 FT MLLW TO -18 FT MLLW DEPTH CONTOUR.

NOT FOR CONSTRUCTION
FOR REGULATORY REVIEW ONLY
-12IV'
-16
-20
-24
-28
-32
CROSS SECTION M-M'
HATTERAS INLET FLOOD
CHANNEL OPEN WATER
PLACEMENT ARE n
'V' 1
-2
-16
-20
-24
-28
-32
-36 -36
0+00 1+00 2+00 3+00 4+00 5+00 6+00 7+00 8+00 9+00 10+00 11+00 12+00 13+00 14+00 15+00 16+00 17+00 18+00 19+00
DISTANCE ALONG PROFILE
HATTERAS INLET FLOOD CHANNEL
OPEN WATER PLACEMENT AREA
1. ELEVATIONS ARE REFERENCED TO MLLW. PERMITTED DREDGE
DEPTH IS RELATIVE TO THE MLW DATUM BEING APPROXIMATELY
0.08' ABOVE MLLW PER NOAA PID EX0400
2. MAXIMUM AD EL. OF-11.92' MLLW SHOWN ON CROSS SECTIONS
IS EQUAL TO-12.00' MLW PER NOAA PID EX0400.
$a and ary z
ry W
N W
u
w 0
Q
oC Z U
a J J
w U w
Q
zz z
u
>z= _
aHC uz
0:o
N Q Z 0
U
G
Ln
Cc w z Z
Z =
F uo U
w Z
K
Ln
Q Q
= w
Sheet 2
I