Hatteras Inlet Project Report 1/14/2021

Kenneth Willson
Program/Project Manager
Coastal Protection Engineering of North Carolina, Inc.
COASTAL
PROTECTION
ENGINEERING
January 14, 2021
David Bernhart
NMFS — Protected Resources Division
263 13th Avenue South
St. Petersburg, FL 33701
Subject: Hatteras Inlet Project Report (USACE Action ID. SAW-2016-02140)
Dear Mr. Bernhart:
4038 Masonboro Loop Road
Wilmington, North Carolina
Tel: [phone]
[e-mail]
This letter serves as the project report required by special condition #24 of the above referenced permit, which allowed
Dare County to conduct maintenance dredging within the Connector Channel Corridor located between Ocracoke
Island and Hatteras Island, North Carolina. Special condition #24 requires that a project report summarizing the results
of the dredging and the sea turtle take (if any) be submitted to NMFS within 30 working days of completion and that
the reports shall contain information on project location, start-up and completion dates, cubic yards of material dredged,
incidental takings (include photographs, if available) and sightings of protected species, mitigating actions taken,
screening type (inflow, overflow) utilized, daily water temperatures, name of dredge, names of endangered species
observers, percent observer coverage, and any other information the contractor deems relevant.
Project Description:
On December 3Td, 2020, the US Army Corps of Engineers (USACE) operated Sidecast Dredge Merritt began dredging
in the Connector Channel/South Ferry Channel in the vicinity of Hatteras Inlet. The Dredge Merritt conducted
maintenance dredging in the channel for approximately 15 days between December 3rd and December 19th. A
comparison of surveys conducted by the USACE on November 10d', 2020 and December 21st, 2020, indicated the
removal of approximately 4,600 CY of material within the area reported to have been dredged by the dredge crew. The
removal of the material resulted in controlling depths of approximately -8 ft. mean lower low water (MLLV,� through
the South Ferry Channel. The resulting channel is approximately 75 feet wide.
The dredge crew reported that the dredge almost exclusively cast material to the north side of the channel during dredge
operations. A comparison of the pre- and post -dredge surveys, which are provided in Attachment 1, indicates infAling
of the south side of the channel due to migration of shoals located to the south east of the navigation channel.
Mitigation Actions and Observations:
No dredge operations associated with this event occurred between April 1 and September 30. The originally stated goal
of the December 2020 maintenance event was to establish an approximately 9 ft. deep channel with bottom width of
approximately 150 ft. Based on the conditional survey conducted by the USACE on October 15, 2020, establishment
of the proposed channel would have required the dredging of approximately 20,000 cy of material. The proposed
channel is shown on the project drawings (Attachment 2), which include both plan view and cross -sectional view.

The County and its consultant (CPE) coordinated closely with both NC DCM and USACE regulatory staff on the
progress of the project. In accordance with the permit construction activities complied with the "Guidelines for
Avoiding Impacts to the West Indian Manatee". Furthermore, sidecast dredge operations did not place any material
above the MLW to avoid impacts to federally listed Seabeach Amaranth, Piping Plover, Red Knot Green sea turtle,
Hawksbill sea turtle, Kemp's ridley sea turtle, Leatherback sea turtle, Loggerhead sea turtle, and their habitat..
To the knowledge of the contractor, no protected federally listed species was killed, injured, captured, harassed, or
otherwise harmed by the conduct of the maintenance activities (i.e. no incidental takings). No protected species were
observed during the conduct of the work; however, protected species observers were not required as a condition of the
permit Furthermore, in accordance with the permit material excavated by the Sidecast Dredge Menitt was placed at
least 100 linear feet from known SAV resources.
Please feel free to contact me should you have any additional questions regarding this project.
Very truly yours,
APTIM COAS AL PPLLANNNIINNG&ENGINEERING OF NORTH CAROLINA, INC.
Ken Willson
Project Manager
CC: Josh Pelletier —USAGE
Fritz Rhode —NMFS-HCD
Heather Coats — NC DCM
Gregg Bodnar — NC DCM
Brent Johnson — Dare County
Attachments: Attachment 1 —Pre-Construction and Post -Construction Survey Charts
Attachment 2 — Construction Drawings dated October 28, 2020

Attachment 1— Pre -Construction and
Post -Construction Survey Charts

US Army Corps
O Engineers
Wilmington District
)
CO
U.
o
»
)
{
§
%
CO
(
of
_
..
g
/
}
\
\
\
\
§
\
�
§
§
\
\
0
CA\
}
§
4
§
\
)
/
j
}
00
j
2
°
M
$
o
»
)°
\
±
2
\
)
\
2
[
a
§
/
§
)
j
of
IL\
$
k
»

US Army Corps
O Engineers
Wilmington District
\
k
\
}
_
)
{
§
Q
(
CO
of
_
.j
g
/
}
\
\
\
\
§
\
2
2
3
)
\
o
R
4
§
(
m
/
�
\
\
j
§
2
°
M
°
..
\
\
±
2
\
)
w
2
[
a
§
/
§
\
§
$
j
}
\
k
»
>-
@
LLI
c
E;
COG��
E,§
@
M§
Q
^§!
LL
LV)
aLUk
_o
$
_ƒ
�(
§z0Z
c
§
f);
o
Ir mz
` k
2
L)

Attachment 2 — Construction Drawings

CHARLOTTE
N.T.S.
NOT FOR CONSTRUCTION
FOR REGULATORY REVIEW ONLY
0 7500 15000
GRAPHIC SCALE IN FT
RALEIGH* &P
-JACKSONVILLE • tc s
CAPE FEAR
HATTERAS INLET MAINTENANCE PROJECT
DARE COUNTY, NORTH CAROLINA
CAPE HATTERAS
PROJECT LOCATION
REHEAD CITY
LOOKOUT
Z
a
W
W
SHEET INDEX
z
1
COVER SHEET
3
Z
2
PROJECT OVERVIEW
IY k
3
CONNECTOR CHANNEL PLAN VIEW
C
4
CONNECTOR CHANNEL CROSS SECTIONS
F
u
W � �
O C 00 o
GENERAL
NOTES:
� `
o
aoZ.
1.
COORDINATES ARE IN FEET BASED ON NORTH CAROLINA STATE PLANE COORDINATE SYSTEM, NORTH AMERICAN
a s o 0 0
DATUM 1983, (NAD83)
w o a z u
2.
ELEVATIONS ARE REFERENCED TO MLLW. PERMITTED DREDGE DEPTH IS RELATIVE TO THE MLW DATUM BEING
p Z Z
APPROXIMATELY 0.08' ABOVE MLLW PER NOAA PID EX0400.
C: O
3.
DATE OF AERIAL PHOTOGRAPHY: CS-1, PV-1 AND PV-2 FEB. 2017 GOOGLE EARTH.
4.
SURVEY DATA COLLECTED BY US ARMY CORPS OF ENGINEERS. OCTOBER 15, 2020.
5.
BATHYMETRIC CONTOURS REPRESENT THE CONDITIONS OF THE CHANNEL ON OCTOBER 15, 2020 AND SHOULD
NOT BE RELIED ON FOR NAVIGATION PURPOSES.
LEGEND
—�—»— —»—��— MEAN LOW WATER LINE
MEAN HIGH WATER LINE
------- CROSS SECTION LINE
0 HAT-03-V-18 HATTERAS INLET BORINGS 2003 AND ID nt
A.
NEARSHORE DISPOSAL AREA
vQ �� a� o
6 C w Uw
l \ SUBMERGED AQUATIC VEGETATION AND 100 FT. BUFFER
\ a
N �
ASBUILT EXISTING CABLE ROUTE (CALDWELL CABLE VENTURES) oa
EXISTING CABLE ROUTE (UTLITY ELECTRICAL CONSULTANTS, PC)
ASBUILT NEW CABLE ROUTE
t
ATLANTIC
W
W Z
Way
OCEAN +0.52' MHW
N u
+0.41' NAVD88
N Q
W Lu L Lu
mZo m
WI Z �
+0.08' MLW
"� W
------------------
+0.00' MLLW
---
a 'z o
m o
TIDAL DATUM
Zko
REFERENCE
TIDAL DATUM REFERENCE BASED ON NOAA TIDE DRAWING NO.
STATION ID 8654467 EPOCH 1983-2001" CS-1
NAME
DATE
SHEET 1 OF 4

S S S i� ��\ ` S L) ti s �l S i�T� y�1 S
� � ) � �' � �
\\� t�L � � �/ CONNECTOR 1—� L_\ �\i �/^ � /I 1
) \ ) \ CHANNEL CORRIDOR �� ) /� � /� /
547000 L\ �\` /1 _\ �—��__�1 �\�� f� /HAT-03-V-6
i � • � \/ 1
i _—_ _ PAMLICO SOUND �� � i �� ti.gT-03-V-9O O
HAT-03-V-8
`V �� •� `\`_ CHARTED WRECK '
• � _ AVOIOAN CE AREA HAT-03-V 1U
\ •
__ - -- Q HATrERAS
,�\, `•�• _� OZ-TAT=C531T-i6 ---��� O HAT-03-V-11 �' 4a���
sa2000 �� •• Q OHAT-03-V-12
t \ �`
�`` HAT-03-V-17 � � HAT-03-V-13
� 0 HAT- HAT-03-V-14 �
�1a�=
/ `� _ ��
�i� \� -V-1B `��7
H V '� �" HATrERAS
�_ HAT-03-V-19 � INLET
i / `� `�
�\
�l
�i'OCRACO KE � ��
__-- �.
..�. -i ISLAND---------�
�' LIFE SAVING STATION PROPOSED CONNECTOR
����
i� AVOIDANCE AREA CHANNEL
— / BREAKING SHOAL
• _ AVOIDANCE AREA
NOT FOR CONSTRUCTION
FOR REGULATORY REVIEW ONLY
p 1000 2000
GRAPHIC®
�_ I PV-1
g r�e¢r z oc �

CROSS SECTION A -A'
00 0+b0 5+b0 10�00 15�00 20�00 25-�00 304
DISTANCE ALONG SECTION (FEET)
CROSS SECTION B-B'
5
W
LLLL -5
2 -10
z
O
Q -15
W
J
W
IIIIIIIIIIKIII
-25
NOT FOR CONSTRUCTION
FOR REGULATORY REVIEW ONLY
FLW EL. +0.08'
CHANNEL
WIDTH 150'
5 5
0
0
........
F
.-.- OCTOBER 15, 2020 .............
EXISTING GRADE
-5
W
L;
-5
EL. -9.0' MLLW
---E-
....................... ---------------- - --
-10
10
13
Jl
z
TARGET AD EL. = -9.0' MLLW
H
15
W
-15
MAXIMUM AD EL. =-11.92' MLLW
W
........ 1.-.-_
.-.-.-.-.-.-.-.-.-.-.-..
_qn
-20
DISTANCE ALONG SECTION (FEET)
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.
CROSS SECTION C-C'
C A -A' C'
EL_+0_52' _
EL. +0.08'
OCTOBER 15, 2020
EXISTING GRADE
EL. -9.0' MLLW
AD EL. = -9.0' MLLW
MAXIMUM AD EL. =-11.92'
CHANNEL
WIDTH 1W
DISTANCE ALONG SECTION (FEET)
o5 10
VERTICAL GRAPHIC SCALE IN FT
1
-10
-25
W
G "
�w o
uu
K 2 2 OR
W L�� u
m o J
W G Z Z
W £ Q
W � W
> a z
2 Z
x
0 200 Soo I
HORIZONTAL GRAPHIC SCALE IN I I XS-1
SHEET 4 OF 4 1