Oregon Inlet Q1 2023 Maintenance Event Request DCM 12/19/2022

COASTAL PROTECTION ENGINEERING OF NORTH CAROLINA, INC
4038 MASONaORo Loop ROAD
WILMINGTON, NC 28409
910-399-1905
December 19, 2022
Heather Coats
Beach & Inlet Management Project Coordinator
North Carolina Division of Coastal Management
127 Cardinal Drive
Wilmington, NC 28405
Subject: Oregon Inlet Channel Maintenance Project — Written Notice of Intent to Conduct
Maintenance Dredging in Q1 of 2023 (Major Permit #49-19)
Dear Ms. Coats:
The Division of Coastal Management (DCM) issued a CAMA Major Permit (#49-19) for the maintenance of Oregon
Inlet on June 24, 2019. This permit was subsequently modified on December 21, 2021 and has a current expiration date
of December 31, 2024. This letter serves as a written notice of Dare Counts intent to initiate dredging under the subject
permit.
Dare County intends to utilize the dredge Miss Katie to maintain the Ocean Bar Channel at Oregon Inlet, portions of the
channel that run from Oregon Inlet to Hells Gate referred to as the Alternate Route, and portions of Old House Channel
Range 1. Dredged material will be disposed in proximity to the remaining portion of the Bonner Bridge and in the
nearshore disposal area offshore Pea Island, in accordance with the permits. As previously coordinated with your office,
dredging has been conducted in the Ocean Bar Channel since August 2022 and in the portion of the Oregon Inlet to
Hells Gate channel referred to as the Alternate Route since October 2022. Dredging is scheduled to continue as needed
from January through March 2023. Given the frequent need for maintenance dredging at Oregon Inlet, Dare County
anticipates the Miss Katie will perform regular maintenance work under the subject permit for the foreseeable future.
However, this correspondence is specifically noticing for dredge operations anticipated to occur in Q1 of 2023 January
through March).
The forthcoming dredge maintenance event is anticipated to be limited to dredging within the portions of the Oregon
Inlet Ocean Bar Channel, the Oregon Inlet to Hells Gate Channel (Alternate Route), and Old House Channel Range 1
as shown on the attached plans dated December 19, 2022. Dredging of the Ocean Bar Channel will follow best water as
determined through coordination with the USACE Wilmington District Navigation Branch. Dredging will be limited to
a 400-foot-wide channel with bottom elevation of -16 ft MLW. Dredging of the Oregon Inlet to Hells Gate Channel
(West) will be limited to the specific footprint shown on the attached plans to comply with requirements of the Dept. of
Army permit. Dredging in this channel will be limited to a 100-foot-wide channel with bottom elevation of -10 ft. MLW.
Dredging of the Old House Channel Range 1 Channel will be limited to the specific footprint shown on the attached
plans, which includes a 100-foot-wide channel with bottom elevation of -12 ft. MLW. The disposal sites permitted
include a nearshore disposal site located off the northeastern end of Pea Island and disposal in proximity to the deep
scour holes beneath the Herbert C. Bonner Bridge. Because the majority of the existing Bonner Bridge has been
demolished, the Counts permit limits the disposal to the areas surrounding the remaining bridge pilings which extends
from the shoulder of Pea Island approximately 1,500 feet. This remaining portion of the bridge is known as the "training
structure". The training structure has been left in place to help keep the inlet navigable after removal of the majority of
the old bridge. The intention for keeping the training structure in place is to forestall Davis Slough from returning to the
prevailing deep -water channel through which it flowed prior to the construction of the old bridge. The presence of the
training structure, therefore, effectively serves to minimize the risk that the deep -water channel will migrate south and
threaten the integrity of the Pea Island terminal groin.

Based on bathymetric surveys conducted by EJE Dredging on December 3, 2022, the estimated volume of material
required to be removed to achieve the design channel dimensions for the proposed Ocean Bar Channel is approximately
77,000 cubic yards. Based on bathymetric surveys conducted by the USACE Wilmington District Navigation Branch on
December 5, the estimated volume of material required to be removed to achieve the design channel dimensions for the
proposed Oregon Inlet to Hells Gate Channel (Alternate Route) is approximately 70,000 cubic yards. Based on
bathymetric surveys conducted by the USACE Wilmington District Navigation Branch on September 27, 2022, the
estimated volume of material required to be removed to achieve the design channel dimensions for Old House Channel
Range 1 is approximately 6,000 cubic yards.
Permit Condition #5 of the CAMA Major Permit states, "Prior to the initiation of any dredging activities author*.Zed by thisperit,
the perittee shall, in coordination with the N.C. Department of Natural and Cultural Resources (DNCR), develop and implement an
archaeological survey of the proposed project area. Initiation of permitted dredging activities shall not begin until written approval is obtained
from DNCR, and a copy of such approval has been submitted to the Division of Coastal Management. "
In a letter dated August 15, 2022, DNCR stated that with the present alignment of the Ocean Bar Channel the dredging
project will avoid the assumed coordinates of the potentially National Register of Historic Places (NRHP) eligible
shipwreck W.G. Townsend. Through further coordination, a 100-foot radius buffer has been established around the
coordinates of the W.G. Townsend to avoid any impacts. In a letter dated July 29, 2022, DNCR concurred to the USACE
Wilmington Districts request for emergency dredging within the specific footprint of the "Western Alternate Route",
which is the channel referred to in the attached plans as Hells Gate to Oregon Inlet (Alternate Route). Based on this
previous coordination with the DNCR for Q3-2022, the fact that the channel location of both the Ocean Bar Channel
and the Alternate Route are the same as proposed for Q3-2022, and the fact that Old House Channel Range 1 is a fixed
location that has previously been dredged by the USACE, Dare County and its consultants are of the opinion that CAMA
Major Permit Condition #5 has been satisfied.
In accordance with Permit Condition #7, Dare County worked with the USACE regulatory project manager and EJE
Dredging to confirm the dredge has been constructed in accordance with the USACE hopper dredge plant specifications
and that the dredge plant complies with the conditions of t he Corps' 2004 FONSI. The inspections were signed off on
by the County, EJE Dredging, and Josh Pelletier on August 26, 2022.
As you are aware, a pre -construction conference was held on December 15, 2022, in accordance with Condition #10 and
a complete set of project plans is attached.
Please feel free to contact me anytime for further clarification or explanation of the project.
Very truly yours,
COASTAL PROTECTION ENGINEERING OF NORTH CAROLINA, INC.
Ken Willson
Project Manager
CC:
Robert Outten, Dare County
Barton Grover, Dare County
Greg Bodnar, NC DCM
Josh Pelletier, USACE Washington, NC Regulatory Office
Robert Tankard, NC DWR
Sabrina Henry, NPS

EVENT 3 - Q1 2023 OREGON INLET
CHANNEL MAINTENANCE PROJECT
DARE COUNTY, NORTH CAROLINA
A
PROJECT AREA
BODIE
ISLAND
OREGON
INLET
ATLANTIC
PEA OCEAN
ISLAND
PAMLICO SOUND
0�00
GRAPHIC SCALE IN FT
RALEIGH DVLNP
CHARLOTTE &-,\N GPI
ACKSONVILLE-
N.r.s. CAPE FEAR
ECT LOCATION
CAPE HATTERAS
REHEAD CITY
LOOKOUT
ATLANTIC
OCEAN
91.10mriau00
1 COVER SHEET
2 PROJECT OVERVIEW
3 OREGON INLET & OCEAN BAR CHANNEL PLAN VIEW
q OREGON INLET TO HELLS GATE CHANNEL PLAN VIEW
5 OREGON INLET TO HELLS GATE WEST AND OLD HOUSE CHANNEL PLAN VIEW
6 OREGON INLET & OCEAN BAR CHANNEL CROSS SECTIONS A -A', B-B' & C-C'
7 OREGON INLET TO HELLS GATE CHANNEL CROSS SECTIONS D-D', E-E' & F-F'
8 OLD HOUSE CHANNEL RANGE 1 CROSS SECTIONS G-G' AND H-H'
GENERAL NOTES:
1. COORDINATES ARE IN FEET BASED ON NORTH CAROLINA STATE PLANE COORDINATE SYSTEM, NORTH AMERICAN
DATUM 1983, (NAD83).
2. ELEVATIONS ARE REFERENCED TO MLLW.
3. DATE OF AERIAL PHOTOGRAPHY: FEBRUARY 15, 2020.
LEGEND
0
-F 13
k
DREDGE AREA
PERMITTED CHANNEL CORRIDOR
USCG BUOY LOCATION
SHIPWRECK LOCATION
NOT FOR CONSTRUCTION
FOR REGULATORY REVIEW ONLY
CS-1
SHEET 1 OF 8 1

1. PLACEMENT OF DREDGE SPOIL MATERIAL ON DISPOSAL
ISLANDS MN, L, AND C IS NOT INCLUDED IN THE
PROPOSED ACTION.
2. PROPOSED OREGON INLET AND OCEAN BAR CHANNEL
DREDGE AREAS ARE NOT FIXED AND RATHER FOLLOW DEEP
WATER AT TIME OF MAINTENANCE. LOCATION SHOWN IS
REPRESENTATIVE ONLY AND WILL CHANGE BASED ON
BATHYMETRY AT TIME OF MAINTENANCE.
3. ALTERNATE ROUTE PORTION OF OREGON INLET TO HELLS
GATE CHANNEL DREDGE AREA SHOWN ON PV-2 AND PV-3
IS FIXED FOR EVENT 3.
4. PLACEMENT OF DREDGE SPOIL MATERIAL WILL BE
PERMITTED WITHIN PROPOSED INSHORE DISPOSAL AREAS
SHOWN ON PV-2 AND PV-3 AND IN THE NEARSHORE
DISPOSAL AREA OFFSHORE PEA ISLAND.
5. NEARSHORE DISPOSAL AREA INCLUDES THE-2,500 FOOT
PORTION OF THE ACTIVE BEACH PROFILE THAT EXTENDS
FROM 0.0 FT. NAVD88 CONTOUR OUT TO THE -24.0 FT.
NAVD88 CONTOUR.
MARC BASNIGHT BRIDGE
I�WEEFERMITTED qw O RIDOR CHANNEL
DISPOSAL
ISLAND "C"
DISPOSAL
ISLAND "L"
OLD HOUSE CHANNEL
RANGE 1 /
DISPOSAL
ISLAND WN" /
i
OREGON INLET TO
HELLS GATE CHANNEL
(WEST)
PAMLICO
SOUND
1 7 ATLANTIC
\ OCEAN
\ \ OREGON INLET AND
\ OCEAN BAR CHANNEL
OREGON /
` INLET /
\ \�
OREGON INLET TO
HELLS GATE CHANNEL
(ALTERNATE ROUTE)
o1250 2500
M. GRAPHIC SCALE IN FT
NOT FOR CONSTRUCTION
FOR REGULATORY REVIEW ONLY
PV-1
SHEET 2 OF 8 1

OREGON INLET TO
HELLS GATE CHANNEL
(ALTERNATE ROUTE)
PAMLICO
SOUND
0
s
A
5
:N
BODIE ISLQ
r
11_ 1
BRIDGE /
i
OREGON
INLET
\ \C
z�
A-6^
z \
0
d a
� ��. PORTION OF HERBERT C.
BONNER BRIDGE TO REMAIN p
• ELIZABETH CHRISTINE B
O
PEAISLAND
PROPOSED Q OREGON INLET AND
INSHORE DISPOSAL AREA �n¢O�n OCEAN BAR CHANNEL
/ Q~
O
�S
! NOT FOR CONSTRUCTION
FOR REGULATORY REVIEW ONLY
C,��.
V3�SpO
1. LOCATION OF THE PROPOSED MAINTENANCE AREA OF THE
CHANNEL REPRESENTS CONDITIONS ON THE DATE OF MOST
RECENT SURVEYS(DECEMBER 3, 2022). IF CONDITIONS i
DICTATE A CHANGE IN THE PROPOSED MAINTENANCE AREA
DURING Q1-2023, CHANGES WILL BE COORDINATED WITH w
/ USACE NAVIGATION BRANCH AND REGULATORY AGENCIES. w i
2
2. PLACEMENT OF DREDGE SPOIL MATERIAL WILL BE PERMITTED
IN THE PROPOSED INSHORE DISPOSAL AREA WHERE DEEP iSCOQ
'G. THE NEAOLESAROUND POSAL BONA OFFSHORE
EXISTA IS AND IN W i
�I THENEARSHEDDISPOSAL AREA 0FFSHOREING ISLAND. ip
3. SIDECAST DREDGING WILL ONLY OCCUR DURING Q1-2023 BY 0 � m
THE MISS KATIE, IF CONDITIONS REQUIRE SUCH. w�
4. BATHYMETRIC CONTOURS GENERATED FROM SURVEY DATA a
COLLECTED BYTHE USACE WILMINGTON DISTRICTALONG THE
OREGON INLET OCEAN BAR (SEPTEMBER 27, 2022), S
SURROUNDING OREGON INLET BRIDGE(NOVEMBER 22-23, SZ e
2022) AND SURVEY DATA COLLECTED BY E]E DREDGING Q LL
SURROUNDING OREGON INLET BRIDGE, OCEAN BAR CHANNEL, Q omw
AND INSHORE DISPOSAL AREA(DECEMBER 3, 2022). e
BOTTOM OF CUT/ CHANNEL COORDINATE TABLE
Point ID Northing Easting Elevation Inez
-,
aTz
A 758820.79 3033833 -16.0
B 759158.57 3033618 -16.0
C 756940.25 3030121 -16.0
D 755489.07 3029080 -16.0 -
L RIG E 755255.85 3029405 -16.0
F 756644.02 3030401 -16.0
NO DREDGE ZONE
y
rn
—W.G. TOWNSEND
p o t3 Ey i p Va gy e e
ATLANTIC
BOSS LADY OCEAN
a
ANGELDAWN '�p
PERMITTED CHANNEL
/ CORRIDOR z
oD; °ow
�� / E 3p350
z B S a
wiw
A / =zo9g
�°o
of qoo
y / —WING NO
GRAPHIC SCALE IN FT
$ / PV-2

NOTE:
� SSC
1. ALTERNATE ROUTE PORTION OF OREGON INLET TO HELLS GATE
CHANNEL DREDGE AREA IS FIXED FOR EVENT 3.
2. PLACEMENT OF DREDGE SPOIL MATERIAL WILL BE PERMITTED IN
THE PROPOSED INSHORE DISPOSAL AREA WHERE DEEP SCOUR
HOLES AROUND THE BONNER BRIDGE EXIST AND IN THE 26 X
NEARSHORE DISPOSAL AREA OFFSHORE PEA ISLAND.
3. SIDECAST DREDGING MAY BE CONDUCTED IN Q1-2023 BY THE is
MISS KATIE AS NEEDED TO ESTABLISH SUFFICIENT DEPTH TO
LOAD.
4. BATHYMETRIC CONTOURS GENERATED FROM SURVEY DATA
COLLECTED BYTHE USACE WILMINGTON DISTRICT SURROUNDING
OREGON INLET BRIDGE (NOVEMBER 22-23, 2022), OREGON INLET
TO HELLS GATE CHANNEL ALTERNATE ROUTE (DECEMBER 5, 2022),
OREGON INLET TO HELLS GATE CHANNEL WEST (JUNE 30, 2022), R
AND SURVEY DATA COLLECTED BY FIE DREDGING SURROUNDING
OREGON INLET BRIDGE, AND INSHORE DISPOSAL AREA(DECEMBER
3, 2022) i
OREGON INLET TO HELLS
GATE CHANNEL (WEST)
BOTTOM OF CUT/ CHANNEL COORDINATE TABLE
Point ID
Northing
Easting
Elevation
G
754566.78
3020086
-10.0
H
754080.12
3020977
-10.0
I
752790.13
3022559
-10.0
J
752490.86
3023240
-10.0
l K
752144.58
3024255
-10.0
L
751348.31
3025505
-10.0
M
751450.28
3026101
-10.0
N
751548.10
3026080
-10.0
O
751453.39
3025526
-10.0
P
752235.36
3024299
-10.0
Q
752584.12
3023276
-10.0
R
752676.20
3022612
-10.0
5
754162.86
3021034
-10.0
T
754675.63
3020136
-10.0
NOT FOR CONSTRUCTION
FOR REGULATORY REVIEW ONLY
o450 900
GRAPHIC SCALE IN FT
3op0
I R
\ \ V
PAMLICO
SOUND
PERMITTED CHANNEL
OREGON INLET TO
HELLS GATE CHANNEL
(ALTERNATE ROUTE)
io-
MARC BASNIGHT
BRIDGE
,
t
1 z \ \
X 2
19
z
2
°
a
w
i z
3
W i
2 O
O
rc
F Q
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w
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f t
i
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C C
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6z
BODIE
o
0
ISLAND
a
tt
77
IOREGON
��y / INLET
\\14
,A
.So
P °° �� X 13 ��� ✓/
k\\'
&N
TO
M
�r
p, 4
PORTION OF HERBERT C.
BONNER BRIDGE TO REMAIN
PROPOSED INSHORE
!v. DISPOSALAREA C/
0
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8 0 o z
T,w
oo
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1 u 0
FROWING NO
�v PV 3

NOTE:
1. NO DREDGING ANTICIPATED TO BE CONDUCTED IN Q1-2023 pp
ALONG THE OREGON INLET TO HELLS GATE CHANNEL (WEST)
SHOWN ON THIS SHEET. _
2. OLD HOUSE CHANNEL RANGE 1 CHANNEL IS FIXED FOR
EVENT 3.
3. PLACEMENT OF DREDGE SPOIL MATERIAL WILL BE PERMITTED
IN THE PROPOSED INSHORE DISPOSAL AREA WHERE DEEP
SCOUR HOLES AROUND THE BONNER BRIDGE EXIST AND IN
THE NEARSHORE DISPOSAL AREA OFFSHORE PEA ISLAND. "r
4. BATHYMETRIC CONTOURS GENERATED FROM SURVEY DATA
COLLECTED BY THE USACE WILMINGTON DISTRICT ALONG
THE OREGON INLET TO HELLS GATE WEST (JUNE 30, 2022)
AND OLD HOUSE CHANNEL RANGE 1(SEPTEMBI
DISPOSAL
ISLAND "MN"
PAMLICO
SOUND �
�\
\ V v
\
PERMITTED CHANNEL
CORRIDOR \
BOTTOM OF CUT/ CHANNEL COORDINATE TABLE
Point ID
Northing
Easting
Elevation
U
752705.36
3012655
-12.0
V
752653.02
3012743
-12.0
W
750037.72
3011845
-12.0
X
750081.22
3011754
-12.0
NOT FOR CONSTRUCTION
FOR REGULATORY REVIEW ONLY
ISLAND "L"
H
H'
OLD HOUSE CHANNEL
RANGE 1
OREGON INLET TO
HELLS GATE CHANNEL
(WEST)
\
\
30A \
0 300 600 \ :..
GRAPHIC SCALE IN FT 1 �
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DECEMBER 5, 2022
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MAXIMUM AD EL.
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DECEMBER 5, 2022
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_ -10.0' MLLW
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SEPTEMBER 27, 2022
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