DareCounty.Avon.Bio.sitecard.PN.greencards

DIVISION OF COASTAL MANAGEMENT
FIELD INVESTIGATION REPORT
1. APPLICANT'S NAME: Dare County, Avon Beach Nourishment
2. LOCATION OF PROJECT SITE: The project site is located on Hatteras Island in and adjacent to
Avon, Dare County.
Approximate State Plane Coordinates — Approx. Lat: 35121127.52"N (start)/ 35°l9'19.42"N (end)
Long: 75°29'54.31"W (start)/ 75130'25.98"W (end)
INVESTIGATION TYPE: CAMA / D&F
4. INVESTIGATIVE PROCEDURE: Dates of Site Visit — 6/24/21
Was Applicant Present — No
PROCESSING PROCEDURE: Application Received (complete)—8/3/21
DWR Pre-app filing date: 6/14/21 DWR 30-day date: 7/14/21
Office — Wilmington
6. SITE DESCRIPTION:
(A) Local Land Use Plan — Dare County
(B) AEC(s) Involved: OH, PTA, EW
(C) Water Dependent: Yes
(D) Intended Use: Public
(E) Wastewater Treatment: Existing — Private septic
Planned - NIA
(F) Type of Structures: Existing — Primarily residential structures and accessways
Planned — Beach renourishment project
(G) Estimated Annual Rate of Erosion: - 0.5-6.5'/year SBF: 2-6'/year
7. HABITAT DESCRIPTION:
m
[AREA]
DREDGED FILLED OTHER
(A) Vegetated Wetlands (coastal)
(B) Other (Below MHW)
Up to 250 acres
— 77 acres
(C) Other (Above MHW)
--23 acres
Total Area Disturbed: —100 acres of beach fill/LTp to 250 acres of excavation
Primary Nursery Area: No
Water Classification: SB Open: No
S. PROJECT SUMMARY: The applicant is requesting reauthorization of the Town's beach nourishment
project to include approximately 13,200' of oceanfront shoreline, from approximately 4,000' north of
Avon Pier to the southern limits of the Village of Avon.
North Carolina Department of Environmental Quality I Division of Coastal Management
Wilmington Office j 127 Cardtnal Drive Extension I Whnington, North Carolina 29405
910.796.7215

Dare County- Avon Beach Nourishment
Page Two
9. PROJECT DESCRIPTION:
The Village of Avon is one of seven historical villages on Hatteras Island in the Outer Banks with the
National Parks Services' Cape Hatteras National Seashore and the community of Salvo to the north and
National Seashore property and the village of Buxton to the south. It is also bordered by Pamlico Sound
to the west and the Atlantic Ocean to the east, with a total land area of ---2.4 square miles.
Avon Pier is located near the center of the village. The northern end of the Avon oceanfront shoreline has
historically been stable and accretional overall. However, the area south of the pier has experienced
significant erosion due to long-term processes and storm damage with loss of the frontal dune system and
frequent overwash and flooding of NC Highway 12. Furthermore, NC-12 is the sole roadway into and out
of the Village for residents, visitors and emergency responders. As a result, Dare County conducted a
feasibility study to assess the erosion and potential solutions in 2020, The study documented accelerated
erosion over the past 20 years, with erosion rates as high as 20'/year and established 5 reaches within the
area based on shoreline volumes.
The long-term erosion rate for the proposed project area ranges from approximately 0.5-6.5'/year. The
Division's calculated l 00-year storm recession line for the Town is predicted to be 30'.
The waters in the project area fall within the Pasquotank River Basin, as classified by the NC Division of
Water Resources (DWR). The waters of the Atlantic Ocean are classified as SB by the DWR. The NC
Division of Marine Fisheries has NOT designated any of the areas to be impacted as a Primary Nursery
Area.
PROPOSED PROJECT:
After evaluating current conditions and potential alternatives, the applicant is proposing a beach
nourishment project at Avon along with the addition of engineered dune construction along the part of the
shoreline with most severe erosion south of Avon Pier. The project site extends along approximately 2.5
miles (13,200') in total, with 4,000' of that length to be beach fill only (no engineered dune construction)
north of the pier. A permit application has also been submitted to the National Parks Service for their
approval of the nourishment project.
As proposed, the beach berm would be filled to an elevation of +7' NAVD 88 with a 15:1 slope out to tie
into existing grade at approximately -4' to-10' NAVD 88. The berm would be constructed at a variable
width ranging from —38- 115' at the north end of the project where no dune construction would occur, to
a berm width of—70-200' waterward of the proposed engineered dune at the southern end of the project.
As proposed, an engineered dune would be constructed along the southern 9,500' of shoreline at a crest
elevation of -+-13' NAVD and an average 20' crest width, with a 3:1 slope down to the +7' berm elevation.
The applicant states a maximum volume of up to l million cubic yards of sand would be excavated to
construct the template, which is intended to achieve a 5-year design life, given normal conditions. It is
currently estimated that 77 acres would be filled below MHW. Approximately 23 acres of beach fill
material would be placed above the MHW line.
Sand fencing and vegetative plantings are also proposed. The narrative states that sand fencing and
planting locations would be finalized post -construction based on site conditions at that time, but the plan
DEQ "5
North Carolina Department of Envlronmentai Quality I Division of Coastal (Management
Wilmington Office 1 127 Carchnai Drive Extension I Wilmington, North Carolina 28405
910.796.7215

Dare County- Avon Beach Nourishment
Page Three
provided shows the location of a single row of sand fencing located along the center of the engineered
dune crest. The plan shows sand fencing installed in 10' long sections spaced a minimum of 7' apart and
installed at a diagonal orientation (Sheet 13). American beachgrass, sea oats and bitter panicum (or
potentially other dune plant species) would be installed immediately adjacent to the sections of sand
fencing. The narrative also states (page 10) the planting of vegetation is proposed along Reach 3, where
no engineered dune is proposed.
The narrative further states that land -based equipment will be brought to the site over public roads and
will enter the beach at designated beach access areas. Any alteration of dune vegetation/topography
necessary for equipment access will be authorized prior to undertaking any work and be repaired to pre -
project conditions.
The applicant is proposing to use a ---250-acre borrow area located. approximately 3 miles northeast of the
Avon shoreline. Two dredge depths are proposed based on evaluation of compatible material from the 12
vibracores collected within the borrow area. Zone 1 (called Borrow Area 1) would be dredged to a depth
of 10' with final excavated elevations ranging from approximately -40' to -6 1' NAVD 88, and the second
area (Borrow Area 2) located immediately to the south would be dredged to a depth of 6', which would
result in final elevations ranging from approximately -40' to -5 5' NAVD 88. The borrow area as a whole
is currently estimated to contain approximately 3.4 mcy of material, based on bathymetric data collected
by CSE in July 2020 and proposed dredge depths. Composite samples for a 10' dredge depth for Borrow
Area 1 were determined to have a mean grain size of 0.308 mm with an average composite sand content
of 96.6%. The average composite gravel content for material within proposed dredge depths in this part of
the borrow area was 0.1 %, with an average granular content of 2.6%, average fines content at 0.7% and
calcium average carbonate at 16.4%. Composite samples evaluated for a 6' dredge depth in Borrow Area
2 yielded a mean grain size of 0.331mm, with composite sand content at 91.6%, 0.7% gravel material,
5.1% of granular material, 2.6% fines and 16.8% calcium carbonate.
A submerged cultural resources survey was conducted by Tidewater Atlantic Research in July 2021.
Three magnetic anomalies were found within the proposed borrow area, however the applicant states they
appear to represent small ferrous objects and not potentially significant cultural resources. Therefore, no
buffers or avoidance areas are proposed within the borrow area.
The native beach was characterized through collection of samples at 5 transects. The mean grain size was
calculated at 0.289 mm. Granular and gravel material were calculated at 1.7% and 0%, respectively. Fines
were calculated at 0.1% and calcium carbonate at 4%. Large sediment material was calculated along the
project area, resulting in an average of 5 shell fragments over 3" in size per transect and less than l
sediment sample per transect on average measuring greater than 1" in diameter.
While individual samples of vibracores collected within the proposed dredge limits show elevated content
(>19%) of calcium carbonate, and AV-19 also has elevated fines (indicated as mud) material of —24%
from 4-6' depth, the composite (weighted average) content levels when taken for the borrow area as a
whole compared to the native beach meet the threshold requirements described in 15A NCAC 07H
.0312(c). The applicant has committed to ensuring material is inspected daily to monitor material and
contacting DCM and the USACE if non -compatible material is encountered (in accordance with the
standard permit condition and as referenced as Condition No. 29 on page 7 of Appendix B). The applicant
has further stated that the large borrow area, containing an estimated 3.4 million cubic yards of sand when
only 1 million cubic yards of excavation is proposed, offers ample flexibility for the contractor to relocate
to suitable areas should they encounter incompatible material.
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North Carolina Department of Environmental Quality I Division of Coastal Management
Wilmington office 1 127 Cardinal Drive Extension I Wilmington, North Carolina 28405
910.7%,7215

Dare County- Avon Beach Nourishment
Page Four
Dredging would be conducted via a hopper dredge or cutterhead pipeline dredge. Construction is
proposed year-round due to weather -related constraints. The narrative states that construction is
anticipated to take 3 months if conducted during the summer months.
Additional mitigation and monitoring measures to account for work outside of the environmental window
are also proposed, as described in Appendix B.
An interagency scoping meeting was held on March 4, 2021.
10. ANTICIPATED IMPACTS
The proposed dredging associated with the project would result in impacts to up to 250 acres of
submerged bottom at the borrow area. The project would result in the fill of approximately 77 acres of
upper beach (above MHW) and would fill approximately 23 acres of intertidal area and nearshore shallow
bottom. The dredging and beach fill would result in temporary increases in turbidity. Temporary impacts
to benthic and invertebrate infaunal communities can be expected. The applicant states they propose to
dredge year-round due to weather constraints, and have proposed mitigative measures as outlined in the
narrative and anticipate permit conditions similar to the original permit. The applicant has committed to
utilizing existing beach accessways with heavy equipment to minimize impacts to the dunes.
Submitted by: Heather Coats Date: August 25, 2021 Office: Wilmington
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North Carolina Department of Environmental Quality I Division of Coastal Management
Wilmington office 1127 Cardinal Drive Extension I Wilmington, North Carolina 28405
910.7%.7215

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
BRAXTON DAVIS
Director
Ms. Haiqing Kaezkowski
Coastal Science & Engineering
PO Box 8056
Columbia, SC 29202
Dear Ms. Kaczkowski:
NORTH CAROLINA
Environmental Quality
September 2, 2021
The Division of Coastal Management hereby acknowledges receipt of your application, acting as agent for
Dare County, for State approval to authorize beach nourishment for the Village of Avon, extending 13,200'
from the northern limit located approximately 4,000' north of the Avon Pier to the southern limit of Avon,
Dare County, and adjacent to the Atlantic Ocean. It was received as complete on 8/3/21 and appears to be
adequate for processing at this time_ The projected deadline for making a decision is 10/17/21. An additional
75-day review period is provided by law when such time is necessary to complete the review. If you have not
been notified of a final action by the initial deadline stated above, you should consider the review period
extended. Under those circumstances, this letter will serve as your notice of an extended review. However, an
additional letter will be provided on or about the 75th day.
If this agency does not render a permit decision within 70 days from 8/3/21 you may request a meeting with
the Director of the Division of Coastal Management and permit staff to discuss the status of your project. Such
a meeting will be held within five working days from the receipt of your written request and shall include the
applicant and project designer/consultant.
NCGS 113A-119(b) requires that Notice of an application be posted at the location of the proposed
development. Enclosed you will find a "Notice of Permit Filing" postcard which must be posted at the
property of your proposed development. You should post copies of this notice at a conspicuous point along
the project area where it can be observed by the public. Failure to post this notice could result in an incomplete
application.
An onsite inspection will be made, and if additional information is required, you will be contacted by the
appropriate State or Federal agency. Please contact me if you have any questions and notify me in writing if
you wish to receive a copy of my field report and/or comments from reviewing agencies.
Sincerely,
145e;,�
Heather Coats
Beach &Inlet Management Project Coordinator
cc: MHC/E City Files, DCM Bobby Outten, Dare Co
Josh Pelletier, COE Rick Trone, DWR
North Carolina Department of Environmental Quality I Division of Coastal Management
Wilmington Office 1 127 Cardinal Drive Extension I Wilmington, North Carolina 28405
910.796.7215

0
AMA PERMIT
APPLIED FOR
Applicant requested reauthorization of the TowWs
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COMMENTS ACCEPTED THROUGH October 2021
APPLICANT:
Dare County - Village of Avon
Clo Robert Outten
9*4 Marshall o mns Drive
---Mantee,-NC 27954 --
Agent. Coastal Science_& _En-gineering
Wo Haiging Kaczkowski
[phone]
FOR MORE DETAILS CONTACT
THE LOCAL PERMIT OFFICER BELOW:
NC DIV. of CoastalManagement
127 Gardinal Dr. Ext.
Wgilmingtom, NC 28405
Heather Coats

ROY COOPER
Governor
NORTH CAROLINA
F_nvirunmental Ozial ih
September 3, 2021
[e-mail]
2 Pages
The Coastland Times
Legal Advertisement Section
Re: Major Public Notice for:
• Dare County — Village of Buxton
• Dare County — Village of Avon
ELIZABETH BISER
Secretary
BRAXTON DAVIS
Direclor, Division ofCoartal Management
Hello: Please publish the attached Notice in the Sunday, September 12, 2021 issue of The Coastland Times.
The State Office of Budget & Management requires an original Affidavit of Publication prior to payment for
newspaper advertising.
Please send the original affidavit and invoice for payment to: Tanya Pietila at the NC Division of Coastal
Management, 127 Cardinal Drive Extension, Wilmington, NC 28405, 910-796-7226. Paying by credit card.
Please email a copy of the credit card receipt to me.
Thank you for your assistance in this matter. If you should have any questions, please contact meat our Wilmington
office.
cc: MHC Files
USACE
WIRO Files
Tanya YJ Pietila
Permitting Support & Customer Assistance
State of North Carolina I Ewaromnental Quality I Coastal Management
127 Cardinal Drive Ext., Wilmington, NC 28405 919 796 7215

NOTICE OF FILING OF
APPLICATION FOR CAMA MAJOR
DEVELOPMENT PERMIT
The Department of Environmental Quality hereby gives public notice as required by NCGS 113A-
119(b) that the following applications were submitted for a development permits in Areas of Environmental
Concern as designated under the CAMA: On September 2, 2021, The County of Dare; pillages of Buxton &
Avon, requested reauthorization of the Village's beach nourishment project to include approx. 15,500' of
oceanfront shoreline that spans the entire Buxton shoreline within the Cape Hatteras National Seashore, and
approx. 13,200' oceanfront shoreline from approx. 4, 000' north of the Avon pier to the southern limits of the
Village, adjacent to the Atlantic Ocean, in Dare County. Copies of these applications can be examined or copied
at the office of Heather Coats N.C. Dept. of Environmental Quality, Division of Coastal Management, 127
Cardinal Drive Ext., Wilmington, NC 28405, [phone] during normal business hours.
Comments mailed to Braxton C. Davis, Director, Division of Coastal Management, 400 Commerce
Avenue, Morehead City, NC 28557-3421, prior to October 3, 2021 will be considered in making the permit
decision. Later comments will be accepted and considered up to the time of permit decision. Project
modification may occur based on review and comment by the public and state and federal agencies. Notice of
the permit decision in these matters will be provided upon written request.

COS E COASTAL SCIENCE & ENGINEERING
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