Hatteras Inlet Project Report 4/18/2019

APTIM
April 18, 2019
David Bemhmt
FIRMS —Protected Resources Division
26313th Avenue South
St Petersburg, FL 33701
Subject Hatteras Inlet Project Report (USACE Action ID. SAW-2016-02140)
Dear Mr. Bemhart:
Kenneth Willson
Program Manager
Apdm Coastal Planning & Engineering ofNorth
Carolina, Inc.
4038 Masonboro Loop Road
Wilmington, North Carolina
Tel:[phone]
[e-mail]
This letter serves as the proj ect report required by special condition #24 of the above referenced permit, which allowed
Dare County to conduct maintenance dredging within the Connector Channel Condor located between Ocracoke
I sland 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 tangs (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 March 16, 2019, the US Army Corps of Engineers (USACE) operated Sidecast Drulge 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 20 days between March 16 and Apn111, 2019.
The Wilmington District USACE provided hydrographc survey charts showing the pre -construction (February 26,
2019) and post -construction (April 11, 2019) depths in the channel. The USACE survey group also conducted a
conditional survey on March 28, 2019. Maps showing all three (3) of these surveys are included as an attachment to
this letter (Attachment 1 — Connector Channel Maps). A comparison of the precomtruction survey conducted on
February 26, 2019 and post -construction surveys conducted on April 11, 2019, indicated that approximately 11,000
cubic yards of material was removed from the channel. The removal of the material resulted in controlling depths
between -8 It and -9 It mean lower low water (MLLW) though the South Ferry Channel. The resulting channel is
between 150 feet and 200 feet wide
Mitigation Actions and Observations:
In accordance with the permit, the applicant notified the USACE Regulatory Division prior to dredging activities that
dredging may occur between Apri11 and September 30. In a letter dated March 6, 2019, Dare County requested up to
fifteen (15) days of relief in April, to complete the maintenance event In support of the request, Dare County stated
that no mainteance dredging was required of the channel in 2018 during the dredge moratorium and although the
channeld conditions are highly dependent on weather conditions, the County is using the best available data to maintain
the channel in such a way as to minimize the need for dredging will= the dredge moratorium. On March 18, 2019

Heather Coats of the North Carolina Division of Coastal Managment provided a letter authorizing the extensions of
the moratorium to allow the work through April 15, 2019. Likewise, in a lettter dated March 18, 2019, David Lekson
of the USACE Washington Regulatory Field Office granted relief through April 15, 2019 for this particular dredge
event.
The modified permit allows for maintenance of a 200 ft. wide channel to a depth of -12 ft. MLW. The Goal of the
March/April 2019 maintenance eventwas to remove approximately 28,600 cy of material to achieve a channel
depth of -10 ft. MLW within the proposed channel, which includes a 150-footwide channel, a 50-footwidener in the
area pinched between the two shoals encroaching on the channel and 1V:3H side slopes.
APTIM staff 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, the project 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 Memtt 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 PLANNING & 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
Bobby Outten — Dare County
Attachments: Attachment 1 — Pre -Construction and Post -Construction Survey Charts
Attachment 2 — Construction Drawings

ATTACHMENT 1
PRE -CONSTRUCTION AND POST -CONSTRUCTION
SURVEY CHARTS
February 26, 2019 (Pre -Construction Survey)
March 28, 2019 (Conditional Survey)
April 11, 2019 (Post -Construction)
APTIM COASTAL PLANNING & ENGINEERING OF NORTH CAROLINA, INC.

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NOTES:
1. ELEVATIONS ARE IN FEET AND REFER TO NOAA'S REPORTED
MEAN LOWER LOW WATER (MLLW) RELATIVE TO THE 1983-2001 TIDAL EPOCH.
2. PROJECT SURVEYED WITH DISTRICT SURVEY VESSEL,,KNOWLTON ", USING RTK GPS
HORIZONTAL POSITIONING EQUIPMENTAND 200 KHZ SOUNDING EQUIPMENT.
3. HORIZONTAL DATUM NAD 1983. VERTICAL DATUM M.L.L.W..
4. TIDE GAGE LOCATED AT VILLAGE MARINA
USE OF TIDE VALUES FOR THIS GAGE ARE RESTRICTED TO QUALITY ASSURANCE PURPOSES
FOR VERIFICATION OF RTK TIDES. THE WILMINGTON DISTRICT WILL ONLY USE STAFF
GAGE TIDAL VALUES FOR FINAL MAPPING AND QUANTITY CALCULATIONS IF RTK GPS IS UN-
AVAILABLE AT THE TIME OF SURVEY.
5. THE INFORMATION DEPICTED ON THIS SURVEY MAP REPRESENTS THE RESULTS OF SURVEYS
MADE ON THE DATES INDICATED AND CAN ONLY BE CONSIDERED AS INDICATING THE GENERAL
CONDITIONS EXISTING AT THAT TIME. THESE CONDITIONS ARE SUBJECT TO RAPID CHANGE
DUE TO SHOALING EVENTS. A PRUDENT MARINER SHOULD NOT RELY EXCLUSIVELY ON THE
INFORMATION PROVIDED HERE. REQUIRED BY 33 CFR 209.325
7. NAVIGATION AIDS LOCATED WITH DISTRICT SURVEY VESSEL, ACCURACY +1-3 METERS.
8. SURVEY CONDUCTED BY US ARMY CORPS OF ENGINEERS, WILMINGTON DISTRICT.
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ATTACHMENT 2
CONSTRUCTION DRAWINGS
Dated March 5, 2019
APTIM COASTAL PLANNING & ENGINEERING OF NORTH CAROLINA, INC.

HATTERAS INLET MAINTENANCE PROJECT
PAMIrCO SOUND
PROJECT AREA
HATTERAS
HATTERAS
OCRACOKE INLET
ISLAND
ATLANTIC OCEAN
0 7500��ls
GRAPHIC SCALE IN FT
RALEIGH O�NP
CHARLOTTE
N.T.S.
NOT FOR CONSTRUCTION
FOR REGULATORY REVIEW ONLY
CAPE FEAR
DARE COUNTY, NORTH CAROLINA
HATTERAS CAPE
PROJECT LOCATION
REHEAD CRY
LOOKOUT
ATLANTIC
OCEAN
SHEETINDEX
1 COVER SHEET
2 PROJECT OVERVIEW
3 CONNECTOR CHANNEL PLAN VIEW
4 CONNECTOR CHANNEL CROSS SECTIONS
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 MLW.
3. DATE OF AERIAL PHOTOGRAPHY: CS-1 AND PV-1 ESRI ]ANUARY 2016, PV-2 NCDOT HATTERAS IMAGE MARCH 2O16.
4. SURVEY DATA COLLECTED BY US ARMY CORPS OF ENGINEERS. FEBRUARY 26, 2019.
5. BATHYMETRIC CONTOURS REPRESENT THE CONDITIONS OF THE CHANNEL ON FEBRUARY 26, 2019 AND SHOULD
NOT BE RELIED ON FOR NAVIGATION PURPOSES.
LEGEND
—••—••— MEAN LOW WATER LINE ®[['
MEAN HIGH WATER LINE
— — — CROSS SECTION LINE
Q HAT-03-V-18 HATTERAS INLET BORINGS 2003 AND ID j
NEARSHORE DISPOSAL AREA
a
� ) SUBMERGED AQUATIC VEGETATION AND 100 FT. BUFFER
i
i
ASBUILT EXISTING CABLE ROUTE (CALDWELL CABLE VENTURES)
EXISTING CABLE ROUTE(UTLTTY ELECTRICAL CONSULTANTS, PC)
ASBUILT NEW CABLE ROUTE
CS-1

PAMLICO SOUND
I��a1 CONNECTOR
CHANNEL CORRIDOR
CHARTED WRECK
AVOIDANCE AREA
—
\ 0
HAT-03-V-6
0
HAT-03-V-7
0
HAT-03-V-90 0
HAT-03-V-8
HAT-03-V-1
HATTERAS'
0 HAT-03-V-11
\ 0 GHAT-03-V-12
j\ HAT-03-V-17 \ HAT-03-V-13
hj 0 HAT-03-V-15 HAT-03-V-14
AT-03-V-18
0 HATTERAS
)_ HAT-03-V-19 \ INLET
i OCRACOKE
-' ISLAND
LIFE SAVING STATION
AVOIDANCE AREA
BREAKING SHOAL J ` PROPOSED
f — / AVOIDANCE AREA CHANNEL
l �J�
NEARSHORE DISPOSAL
LOCATION
NOT FOR CONSTRUCTION
FOR REGULATORY REVIEW ONLY
j .y
0 1�0`2000
GRAPHIC SCALE IN FT
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SHEE 2 OF 4

BOTTOM OF CUT/ CHANNEL
COORDINATE TABLE
POINT ID
NORTHING
EASTING
ELEVATION
A
540131.0
2963818.0
-10.0
B
540284.0
2965297.0
-10.0
C
540334.0
2965295.0
-10.0
D
540356.0
2966080.0
-10.0
E
540306.0
2966081.0
-10.0
F
540339.0
2967247.0
-10.0
G
540189.5
2967250.9
-10.0
H
540135.5
2965311.9
-10.0
I
539981.0
1 2963833.0
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LIFE SAVING STATION \
AVOIDANCE AREA
NOT FOR CONSTRUCTION
FOR REGULATORY REVIEW ONLY
\ u �6
CHARTED WRECK \ z ��
'z
AVOIDANCE AREA \ W
z
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\ W
\ 0
200
\ 2200400
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GRAPHIC SCALE IN Ff _
3
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0�osi 0 oa D v d oho
CONNECTOR CHANNEL
✓w� O�Q O `W o -7 o CORRIDOR I
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= c'
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HATTERAS
INLET
BREAKING SHOAL
AVOIDANCE AREA
PROPOSED CONNECTOR
CHANNEL

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3
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NOT FOR CONSTRUCTION
FOR REGULATORY REVIEW ONLY
] CROSS SECTION A -A'
B-IJ' C-C'
5
5
'MHW EL. +0.42'
'MLW EL. +0.00'
I I FEBRUARY 26, 2019
.
EXISTING GRADE
5
..... ..... ..... ..... ...
-5
-10
' u
_7m------ --- ------ - -- ---------------'------
-15
TARGET tD EL. = -10.0' MLW
I �.. .... I
-15
CONNECTOR CHANNEL EXTENDS
TO EQUAL DEPTH AT I
MAXIMU M AD EL. _ -12.0' MLW
20
. TIME OF CONSTRUCTION I
I
I
20
-251
-25
CROSS SECTION B-B'
A -A'
5
MHW EL. +0_42'
0 MLW EL. +0.00'
-5 . . .
_10 3 .
I CHANNEL
-15 t WIDTH'150"
DISTANCE ALONG SECTION (FEET)
FEBRUARY 26, 2019
EXISTING GRADE
—.. — 0
.i. . . . . . . . . . + -5
EL' 1�+ -10
J \7 TARGET AD EL. = -10.0' MLW
-15
MAXIMUM AD AD EL. = -12.0' MLW
-20
DISTANCE ALONG SECTION (FEET)
CROSS SECTION C-C'
A -A'
5
5
FEBRUARY 26, 2019
MHW EL. +0.42'
EXISTING GRADE
0
MLW EL. +0.00'
—. 0
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10
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WIDTH 200'
-15
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Ed
TARGET AD EL. = -10.0' MLW
_20
-20
MAXIMUM AD EL. _ -12.0' MLW
-25-
_ _
_
_ _ _
_ -25
DISTANCE ALONG SECTION (FEET)
0 5 10
VERTICAL GRAPHIC SCALE IN FT
0` 250 500
HORIZONTAL GRAPHIC SCALE IN FT
I a„
X
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