R-4070B Southern NC 12 (2)

Merger Team Meeting
May 8, 2014
NC 12 FEASIBILITY STUDY
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DARE COUNTY, NORTH CAROLINA
B UXTON TO AVON IMPROVEMENTS
PREPARED FOR:
NORTH CAROLINA DEPARTMENT OF TRANSPORTATION
PROJECT DEVELOPMENTAND ENVIRONMENTAL ANALYSIS
PREPARED BY:
URS CORPORATION -NORTH CAROLINA

NC12
TRANSPORTATION
IMPR0VEMENT
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Legend
Study Area
NC Routes
Local Road
Significant Natural Heritage Area
National Park
Sources; CGIA, NCDOT,
NCOENR, Dare County, URS
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Creek
Pamlico Sound
Cape
Creek
Begin Study ``� tlantic
Brooks Ocean
Creek 4
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Lighthouse Pond
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Threatened and Endangered
Species
(Present in Dare County)
Notable Water Resources
Potential Historic Properties
(Buxton)
Potential Historic Properties (Avon)
American alligator, red wolf, piping plover, seabeach
amaranth, bald eagle, red - cockaded woodpecker,
West Indian manatee and five species of sea turtles
Askins Creek, Brooks Creek, and Cape Creek are
identified as 303(d) listed waterways.
Potential historic resources include the W. Rocky and
Cynthia Tolson Rollinson House, the Urias O. and
Caddie Midgett Gaskins House, and Gaskins
Elementary.
Potential historic resources include the Emma Miller
and Jarvis Grey House, the Henrietta Scarborough and
Issac T. Meekins House, the Zion Scarborough
Cemetery and the Thomas and Joseph Ann Gray
House.
Source: R -4070B Community Characteristics Report, 2012

NC12
TRANSPORTATION
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Pamlico
Sound
1
Atlantic
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• NC 12 Improvement Project Studies were
initiated (2000)
• CP -1 (Purpose and Need, 2002)
• Technical Documents Completed Include:
— Bathymetric and Beach Profile Surveys
— Phase I Architectural Survey
— Community Characteristics Report

Previously Defined Need:
• Reliable access through the project study area.
• Maintain the integrity and viability of the
transportation system with minimal
interruption of traffic service.

Previously Defined Purpose:
Implement measures to maintain the integrity
and viability of the transportation system with
minimal interruption of traffic service due to a
moderate storm event between Buxton and
Avon for a period of 50 years. (For the purposes
of the Feasibility Study, a 50 -year timeframe is
being evaluated.)

NC12
•
TRANSPORTATION
IMPROVEMENTS
Atlantic
Ocean
L-��NPS noted beach
m erosion
BuxtO

SS Access
60 Parking
Atlantic
Ocean
Haulover Beach
ADA Boardwalk
Kite Point Parking
SS 59 Parking
Former Buxton CGS
ADA Boardwalk
Lighthouse Bea
ADA Boardwalk
Parking Area
ADA Boardwalk
Lighthouse

NP5 Proposed Facilitie Project
Haulover Beach ADA Boardwalk
Kite Point Parking
SS Access 59 Parking
SS Access 60 Parking
Former Buxton CGS ADA Boardwalk
Lighthouse Beach ADA Boardwalk
Loran Road Parking Area ADA Boardwalk
Lighthouse Road Elevation
ADA boardwalk at Ramp 34
A 15 -car parking area west side of
highway at /near Kite Point
A 15 -car parking area at soundside access
#59
A 5 -car parking area west side of highway
at /near soundside access #60
A 50 -car parking area at the former
Buxton Coast Guard Station
A handicap accessible boardwalk at
Lighthouse Beach
A 3 -car parking area at Loran Road
An elevated section of Lighthouse Road to
address flooding at ramps 43 and 44
* Source: National Park Service, Proposal to Facilitate Additional Public Beach Access, Environmental Assessment, June 2013.

ELEMI
Functional CIz
Terra
Design S
Posted S
Right of Wa
Control of
Shoulder
Paved Shouk

ELEMENT
Distance Between NC 12 Pavement ai
of Dune
Dune Height*
Dune Slope on NC 12 Side
Dune Top Width
Dune Slope on Ocean Side
From: R -40708 Design Criteria by URS, 2014
*Actual dune height will depend on surrounding elevation

1. Road Relocation A *- Relocating the NC 12
roadway west of the existing roadway to meet
the "Average" modeled shoreline control.
2. Road Relocation B *- Relocating the NC 12
roadway west of the existing roadway to meet
the "Average" modeled shoreline control, but
also relocate the roadway as far as practicable
without significantly increasing environmental
impacts.
* NCDOT may opt to base alternatives on predicted high erosion shoreline.

3. Beach Nourishment- Implementing a beach
nourishment program to protect NC 12 in the
current location.
4. Combination Road Relocation/ Nourishment-
A combination of road relocation and beach
nourishment.
Allfour alternatives include constructing and
maintaining dune structures adjacent to the
roadway.

The long term design options will be similar to
the four short term design options but designed
fora 50 -year design life.
— Road Relocation
— Bridging
—Beach Nourishment
— Combination
The shoreline change analysis may result in
changes to any of the alternatives considered.

• NPS policy on shoreline and
barrier islands is to allow
natural processes (erosion,
deposition, dune formation,
overwash, inlet formation and
shoreline migration) to occur
without interference.
• Any variance from the policy
must be approved by the Park
director.
National Park Semite Beach Nourishment Guidance
Satual N ..iv.c inMrd Rgwn �,3'4`:RCSq',N1ktiR7R— b!I'JSRI
(Natural Resource Technical Report NPS /N RS /GRD /NRTR/- 2412/581)

• February 28, 2014: Internal Scoping Meeting
• April 22, 2014: National Park Service Meeting
• Draft Traffic Forecast being reviewed