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South Island Dredging Association-
Beaufort County, SC
South Island Dredging Association-
Beaufort County, SC
JOINT
PUBLIC NOTICE
CHARLESTON DISTRICT, CORPS OF ENGINEERS
69A Hagood Avenue
Charleston, South Carolina 29403-5107
and the
S.C. DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL
OFFICE OF OCEAN AND COASTAL RESOURCE MANAGEMENT
1362 McMillan Avenue, Suite 400
Charleston, South Carolina 29405
REGULATORY DIVISION
Refer to: P/N #2012-00926-2IR
September 27, 2012
Pursuant to Section 10 of the Rivers and Harbors Act of 1899 (33 U.S.C. 403), Sections 401
and 404 of the Clean Water Act (33 U.S.C. 1344), and the South Carolina Coastal Zone Management
Act (48-39-10 et.seq.) an application has been submitted to the Department of the Army and the S.C.
Department of Health and Environmental Control by
SOUTH ISLAND DREDGING ASSOCIATION
ATTN: JACK BRINKLEY
46 GULL POINT ROAD
HILTON HEAD, SOUTH CAROLINA 29928
for a permit to perform maintenance dredging in
HARBOUR TOWN MARINA,
BAYNARD COVE CREEK AND COMMUNITY DOCK,
BRADDOCK CREEK AND GULL POINT MARINA,
SOUTH BEACH MARINA, PORT VILLAS
with disposal of the dredged material in
CALIBOGUE SOUND
The locations of areas to be dredged are all in Sea Pines Plantation on the southern end of Hilton
Head Island on the Calibogue Sound side, Beaufort County, South Carolina:
Harbour Town Marina: from inner coordinates: Latitude: 32.137605; Longitude: -80.810900
to outer coordinates: Latitude: 32.138848; Longitude: -80.816520
Braddock Cove Creek: from inner coordinates: Latitude: 32.113391; Longitude: -80.822652
to outer coordinates: Latitude: 32.122913: Longitude: -80.825566
Gull Point Marina:
from inner coordinates: Latitude: 32.119260; Longitude: -80.822356
to Braddock Cove Creek Channel
South Beach Marina: from inner coordinates: Latitude: 32.115613: Longitude: -80.824709
to Braddock Cove Creek Channel
Port Villas:
from inner coordinates: Latitude: 32.113314: Longitude: -80.822832
to Braddock Cove Creek Channel
Baynard Cove Creek: from inner coordinates: Latitude: 32.123098; Longitude: -80.816884
to outer coordinates: Latitude: 32.125128; Longitude: -80.824814
Community Dock:
from inner coordinates: Latitude: 32.125636; Longitude: -80.817000
to Baynard Cove Creek Channel
REGULATORY DIVISION
Refer to: SAC#2012-00926-2IR
September 27, 2012
Page 2 of 4
In order to give all interested parties an opportunity to express their views
NOTICE
is hereby given that written statements regarding the proposed work will be received by the Corps
and SCDHEC until
30 days from the Date of this Notice
from those interested in the activity and whose interests may be affected by the proposed work.
The proposed work consists of maintenance dredging approximately 300,000 cubic yards of
material from existing marina basins and access channels with disposal of the material in inshore
waters near the mouth of Calibogue Sound. In detail, the silt, clay and sandy material will be
hydraulically dredged using a small cutterhead dredge. The dredged material will be pumped via
pipeline, using booster pumps as necessary, to an open water off-shore site identified as Placement
Site 5 (PS5). The pipeline will extend 2 to 3.5 miles along the Hilton Head Island/Calibogue Sound
shoreline. It will be floated at the surface except when crossing channels, where it will be submerged
and anchored to avoid impacts to navigation. PS-5 is approximately 4,600 feet from the shoreline of
Hilton Head Island. The dredged material will be discharged through a pipe placed approximately 3
feet above the sediment surface with a baffle plat to ensure even bottom spreading of the discharged
material. Dredging will be conducted continuously and will require approximately 6 months to
complete. The applicant is proposing to conduct monitoring before, during, and after dredging activity
is completed. The applicant has conducted a number of studies/models in support of this proposed
project. The reports for these studies/models are located at the following website/link and are
available for review by all interested parties:
http://www.sac.usace.army.mil/Missions/Regulatory/ProjectsofInterest
The purpose of the proposed work is to maintain navigational access from specific Sea Pines
Waterways to Calibogue Sound for recreational and commercial users.
NOTE: Plans depicting the work described in this notice are available and will be provided,
upon receipt of a written request, to anyone that is interested in obtaining a copy of the plans
for the specific project. The request must identify the project of interest by public notice
number and a self-addressed stamped envelope must also be provided for mailing the
drawings to you. Your request for drawings should be addressed to the
U.S. Army Corps of Engineers
ATTN: REGULATORY DIVISION
69A Hagood Avenue
Charleston, South Carolina 29403-5107
The District Engineer has concluded that the discharges associated with this project, both
direct and indirect, should be reviewed by the South Carolina Department of Health and
Environmental Control in accordance with provisions of Section 401 of the Clean Water Act. As such,
this notice constitutes a request, on behalf of the applicant, for certification that this project will comply
with applicable effluent limitations and water quality standards. The work shown on this application
must also be certified as consistent with applicable provisions the Coastal Zone Management
Program (15 CFR 930). The District Engineer will not process this application to a conclusion until
such certifications are received. The applicant is hereby advised that supplemental information may
be required by the State to facilitate the review.
REGULATORY DIVISION
Refer to: SAC#2012-00926-2IR
September 27, 2012
Page 3 of 4
This notice initiates the Essential Fish Habitat (EFH) consultation requirements of the
Magnuson-Stevens Fishery Conservation and Management Act. Implementation of the proposed
project would impact approximately 106.5 acres of estuarine substrates and emergent wetlands
utilized by various life stages of species comprising the red drum, shrimp, and snapper-grouper
management complexes. Our initial determination is that the proposed action may have a
substantial individual or cumulative adverse impact on EFH or fisheries managed by the South
Atlantic Fishery Management Council and the National Marine Fisheries Service (NMFS). Our
final determination relative to project impacts and the need for mitigation measures is subject to
review by and coordination with the NMFS.
Pursuant to Section 7(c) of the Endangered Species Act of 1973 (as amended), the
District Engineer has consulted the most recently available information and has determined that
the project is not likely to adversely affect any Federally endangered, threatened, or proposed
species or result in the destruction or adverse modification of designated or proposed critical
habitat. This public notice serves as a request for written concurrence from the U.S. Fish and
Wildlife Service and/or the National Marine Fisheries Service on this determination.
Pursuant to Section 106 of the National Historic Preservation Act (NHPA), this public
notice also constitutes a request to Indian Tribes to notify the District Engineer of any historic
properties of religious and cultural significance to them that may be affected by the proposed
undertaking.
In accordance with the NHPA, the District Engineer has also consulted the latest
published version of the National Register of Historic Places for the presence or absence of
registered properties, or properties listed as being eligible for inclusion therein, and this worksite
is not included as a registered property or property listed as being eligible for inclusion in the
Register. To insure that other cultural resources that the District Engineer is not aware of are not
overlooked, this public notice also serves as a request to the State Historic Preservation Office to
provide any information it may have with regard to historic and cultural resources.
Any person may request, in writing, within the comment period specified in this notice, that a
public hearing be held to consider this application. Requests for a public hearing shall state, with
particularity, the reasons for holding a public hearing.
The decision whether to issue a permit will be based on an evaluation of the probable impact
including cumulative impacts of the activity on the public interest and will include application of the
guidelines promulgated by the Administrator, Environmental Protection Agency (EPA), under
authority of Section 404(b) of the Clean Water Act and, as appropriate, the criteria established under
authority of Section 102 of the Marine Protection, Research and Sanctuaries Act of 1972, as
amended. That decision will reflect the national concern for both protection and utilization of
important resources. The benefit which reasonably may be expected to accrue from the project must
be balanced against its reasonably foreseeable detriments. All factors which may be relevant to the
project will be considered including the cumulative effects thereof; among those are conservation,
economics, aesthetics, general environmental concerns, wetlands, historic properties, fish and wildlife
values, flood hazards, flood plain values, land use, navigation, shoreline erosion and accretion,
recreation, water supply and conservation, water quality, energy needs, safety, food and fiber
production and, in general, the needs and welfare of the people. A permit will be granted unless the
District Engineer determines that it would be contrary to the public interest. In cases of conflicting
property rights, the Corps of Engineers cannot undertake to adjudicate rival claims.
The Corps of Engineers is soliciting comments from the public; Federal, state, and local
agencies and officials; Indian Tribes; and other interested parties in order to consider and evaluate
the impacts of this activity. Any comments received will be considered by the Corps of Engineers to
determine whether to issue, modify, condition or deny a permit for this project. To make this
REGULATORY DIVISION
Refer to: SAC#2012-00926-2IR
September 27, 2012
Page 4 of 4
decision, comments are used to assess impacts on endangered species, historic properties, water
quality, general environmental effects, and the other public interest factors listed above. Comments
are used in the preparation of an Environmental Assessment and/or an Environmental Impact
Statement pursuant to the National Environmental Policy Act. Comments are also used to determine
the need for a public hearing and to determine the overall public interest of the activity.
If there are any questions concerning this public notice, please contact Robin Coller-Socha at
843-329-8044 or toll free at 1-866-329-8187.
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x
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~
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SAC#2012-00926-2IR
27 September 2012
MLW -
FIGURE 21
CROSS SECTIONS
HARB OUR TOWN MARINA
SOUTH ISlAND DREDClNG ASSQCIAllON
HILTON ItEAD ISlANO. SOUlli CAAOUN A
BEAUF"ORT COUNTY, SOUTli CAROl.lHA
"""""" ..."""""" """""'"
....T:
HMBOUR TOWN t.WmA
IN:
HILTON HEAD ISUHO, S.c.
COUNTY OF: BEAUFORT COUNTY,
"""" """"'"
SHEET: 21 OF 27
n_ ~
M(AN LOW WATER
.- . ---....
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BRADDOCK COVE CREEK C-C'
·
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,
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WLW - j,jEAN lOW W"'TER
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FlGURE 22
CROSS SECTIONS
..I.AlIllJIlE:
32'07'og.54"H
BRADDOCK COVE CREEK
!.OttQTUOE: 1!IO'411'24.117"W
SUIM:Y
~TVIroI:
Iol.W
SAC#2012-00926·2IR
27 September 2012
AT:
Hl.TotI HOO ISlJ,NO, S.C.
SOUlH ISLAND DREDGING ASSOO ...TION
HIlTCH HEAD ISLAND, SOUlH CARa.JN ...
BEAUFORT COUNTY, SOO lH CAROUN'"
a
SHEET: 22 OF 27
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., II« !Ill. CKU'. lie.
BRADDOCK CO\'( CREEK - E-E'
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,~
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3TOe'S8.N"M
FlGURE 23
CROSS SECTIONS
BRADDOCK COVE CREEK
LDiGITUIlt: atf 411'2&.40'W
SURVEY ~nAI: WLW
IL-
SAC#201 2..Qog26-2IR
27 September 2012
SOI.IlH ISlAND ~ ASSOCIATION
...TON HEAD 1Sl.AHO, SOJTM CARa..IHA
BEAUfORT COUNTY, SCUTM CAROlINA
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t.lLW -
W(AH lOW WA TtR
·!!r------------------.---------------,----------------~
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FIGURE 24
CROSS SECTIONS
.12"OS':U .trN
L1lttCffiJ!lf·IIO'<4" 2O.14"
J&IIWIE;
BRADDOCK COVE CREEK
AT:
IIRAOOOCK COVE CREEK
IN:
...TOH HEAD 1SUrItJ,
s.c.
8AYNARD COVE CREEK H-H'
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,
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00
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SCALe H -
32"07'28.88'"
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o~:n.lIot:
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FIGURE 25
CROSS SECTIONS
BAYNARD COVE CREEK
WLW
SAC#2012-00926-2IR
27 September 2012
SOJTH ISl..AND OREDCINC ASSOO ....lION
HLTON HEAO ISl..AND. SOJTH CNlCIIJIA
BEAUF"ORT COUNTY, SOUTH CARa..NA
t.lEAN LOW WATER
""""""'" """"'...
BAYI'WID ca.t: CREE)(
AT:
··
HIlTON HEAl) ISlNIO, S.C .
COUNTY OF: BEAUFORT COUNTY,
sovn< .........
SHEET:
""-..-.,,r.
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~.
PROI'OSEI>
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IptlGlTllOf- 1IO'411'0II.85"W
SURVEY
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27
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FIGURE 26
OR£OC'N(;
SOUTH ISlAND
12'07"2425-1'1
&r4S '4g 69"W
$UR\I[V DATU M NGVO MLW
DR[OG'~G
ASSOCIATION
PROPOSED
DISPOSAL SITE
~i IIIIIIIIII'~DOO
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MAINTENANCE DREDG IN G
B'V.DOOO< COV£
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HILTON HEAD tSLo.ND. S,C.
COU"TY OF; BEAUFORT COUNTY.
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CA~INA
Discharge pipe will be fined
with a diffuser [0 spread
Dredge
pipeline
Eotrain.rn,ent of
ambient \Yater into
the underflow
Passive
dispersion
fl ow and reduce velocitv
/
Plume
descent
(~J
·
ft )
j
...
Entraimne nl of
4 - sediments info the
water column
Underflow spreading
(Adapted from Teete r, in Thovenot et al.. 1992).
SAC#2012-00926-2IR
27 September 2012
1. DRAWING FOR PERM ITTI NG PURPOSES ONLY.
NOT FOR CONSTRUCTION.
PURPOSE
LATllupe·
MAINTENANCE DREDGING
32"07'24.25'
FIGURE 21
PlACEMENT SITE
DISCHARGE SCHEMATIC
PROPOSED. MAINTENANCE DREDGING
AT'
LONGITUpe - 80""8'49.69"
SURVEY DATUM: NGVD MLW
SHEET: 27 OF 27
ic
e. aZM!
SOUTH ISLAND DREDING ASSOCIATION
HILTON HEAD ISLAND, SOUTH CAROLINA
BEAUFORT COUNTY, SOUTH CAROLINA
GEL EnAI""""Q. LLC
BRADDOC)( COVE CREEK, BAYNARD
cove CREEK, HARBOUR TOWN , GULL
POINT AND SOUTH BEACH MARINAS,
PORT VlLlJ\S
IN'
HILTON HEAD ISLAND
COUNT't"
aEAUFORT COUNn', SC