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the beach. In North Myrtle Beach water up to ,
one foot deep reached about a block inland. V
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flooding for a time, and intiken City North
Waccamaw Drive was flooded and closed F Srarow
during high tide.
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northwar a ong t e soot -facing coastline of
Brunswick County including Holden Beach,
Ocean Isle Beach, Oak Island, and Southport. In j(U1T
Southport, extensive damage occurred to a •
hundred or more boats moored at the town's IVAJA!5
marina. Approximately twenty small and
medium sized boats were shown in news
photos to have been pushed across the Cottage
Creek marsh and came to rest at the Indigo
Plantation neighborhood. Up to three feet of
storm surge flooding caused heavy damage to
waterfront shops in Southport. Bulkheads were
eroded along East Bay Street and a portion of
the sidewalk collapsed. On Oak Island storm
surge flooding damaged or destroyed an
estimated 75-100 vehicles. Sand dunes were
washed onto streets up to three blocks inland.
On Holden Beach 42 of the 45 sea turtle nests
identified before the storm were destroyed.
Town officials estimated damage around $40 ems,
million. At Ocean Isle Beach and Caswell Beach
significant beach erosion occurred and sand r �1 y7'or/c
dunes were destroyed. ► e v e�,
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r" the ape Fear fiver into downtown Wilmingto 9�6 �S
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piannmg outcomes or actions li.e.,mitigation strategy,mitigation action pianl.
Southeastern NC Regional Hazard Mitigation Plan
FINAL—January 2011
f-JoUJ %H /-IAZfI /ZP /Yli %, Alto1J
? _ i9JV
SECTION 1:INTRODUCTION
Section 2:Pluming Process,provides a complete narrative description of the process used to
the Plan.This includes the identification of participants on the planning team,and how the pu
other stakeholders were involved.It also includes a detailed summary for each of the key mee
along with any associated outcomes.
The Community Proffk,located in Section 3,provides a general overview of the Southeastern
Region,Including prevalent geographic,demographic and economic characteristics.In additio
characteristics and land use patterns are discussed.This baseline information provides a snap:
planning area and helps local officials recognize those social,environmental and economic fac
ultimately play a role in determining the region's vulnerability to hazards.
The Risk Assessment Is presented In three sections:Section 4:Hazard Identif othm;Section
ProfRes;and Section fi:Vulnerability Assessment.Together,these sections serve to identify,i
assess hazards that pose a threat to the Southeastern NC Region.The risk assessment also att
define any hazard risks that may uniquely or exclusively affect specific areas of the Southeaste
Region.
The Risk Assessment begins by identifying hazards that threaten the Southeastern NC Region.
detailed profiles are established for each hazard,building on available historical data from pat
occurrences,spatial extent,and probability of future occurrence.This section culminates in a
ranking based on conclusions regarding the frequency of occurrence,spatial extent,and potei
Impact highlighted In each of the hazard profiles.In the vulnerability assessment,NCEM's Risk
Management section's loss estimation methodology is used to evaluate known hazard risks bi
relative long-term cost in expected damages.In essence,the information generated through t
assessment serves a critical function as participating jurisdictions in the Southeastern NC Reg!
determine the most appropriate mitigation actions to pursue and implement—enabling it to f
and focus its efforts on those hazards of greatest concern and those structures or planning ari
the greatest risk(s).
The CapobHllyAssessment,found in Section 7,provides a comprehensive examination of the
the participating jurisdictions in the Southeastern NC Region to Implement meaningful mitigai
strategies and identifies opportunities to increase and enhance that capacity.Specific capabili
addressed in this section include planning and regulatory capability,staff and organizational
(administrative)capability,technical capability,fiscal capability,and political capability.Infom
obtained through the use of detailed survey questionnaires for local officials and an inventory
analysis of existing plans,ordinances and relevant documents.The purpose of this assessmerr
Identify any existing gaps,weaknesses or conflicts in programs or activities that may hinder m
efforts,and to identify those activities that should be built upon in establishing a successful ar
sustainable local hazard mitigation program.
The Community Profile,Risk Assessment,and Capability Assessment collectively serve as a bas
determining the goals for the Southeastern NC Regional Hazard Mitigation Plan,each contribi
development,adoption and implementation of a meaningful and manageable Mitigation Stro
based on accurate background information.
The Mitigation Strategy,found in Section 8,consists of broad hazard mitigation goal stateme
region as well as an analysis of hazard mitigation techniques for the Southeastern NC Region t
In reducing hazard vulnerabilities.The strategy provides the foundation for a detailed i01 ldgat
Southeastern NC Regional Hazard Mitigation Plan
FINAL—January 2021

SECTION 6.VULNERABILITY ASSESSMENT
For the dam failure',drought,excessive heat,infectious disease,radiological emergency,terrorism,
cyber,and EMP,there was insufficient data available to conduct meaningful estimates of property
damages.Therefore,a detailed vulnerability assessment could not be completed for these hazards at
this time.Future updates of this plan should attempt to better quantify vulnerability for these hazards
as better data is developed.
6.2 METHODOLOGY
This vulnerability assessment was conducted using two distinct methodologies:(1)a geographic
information system(GIS)-based analysis;and(2)a risk modeling software analysis with results pulled
from NCEM's Risk Management Tool(RMT).Each approach provides estimates for the potential Impact
of hazards.A brief description of the two different approaches is provided on the following pages.
6.2.1 G115-Based Analysis
Hazards that have specified geographic boundaries permit vulnerability analysis to be conducted using
Geographic Information Systems(GIS).These hazards include:
Flooding
• Geological(Sinkholes and Coastal Erosion)
0 Wildfires
• Hazardous Substances
The objective of the GIS-based analysis is to determine the estimated vulnerability of buildings,critical
facilities and populations for the Identified hazards in the Southeastern NC Region using best available
geospatial data.Digital data was collected from local,regional,state,and national sources for hazards
and buildings.This included local tax assessor records for individual parcels and buildings and
georeferenced point locations for identified assets(critical facilities and Infrastructure,special
populations,etc.)when available.ESRI•ArcGIS'"10.6.1 was used to assess hazard vulnerability utilizing
digital hazard data,as well as local building data.Using these data layers,hazard vulnerability can be
quantified by estimating the assessed building value for parcels and/or buildings determined to be
located In identified hazards areas.To estimate vulnerable populations in hazard areas digital Census
2010 data by census tract was obtained and was supplemented with current population estimates from
the US Census Bureau.This was intersected with hazard areas to determine exposed population carats.
The results of the analysis provided an estimate of the number of people and critical facilities,as well as
the assessed value of parcels and improvements,determined to be potentially at risk to those hazards
with delineable geographic hazard boundaries.
6.2.3 Risk Management Tool
The Risk Management Tool(RMT)was developed by NCEM-Risk Management(RM)as a tool to simplify
hazard mitigation plan development into a single,automated,tool-based format to include geospatially
based risk assessment data,also developed by NCEM-RM.The RMT is a twofold system used to create
and/or update a local and state hazard mitigation plan.The two parts of the RMT are step-by-step
system that will prompt a user to input information and narrative as well as upload pictures,documents,
'As noted in Section 5:Hazard Piles,dam failure could be catastrophic to structures and populations in the
Inundation area.However,due to lack of data,no additional analysis was performed.Further,USAGE and NCDEQ
also complete separate dam failure plans to identify risk and response measures.
Southeastern NC Regional Hazard Mltlgatlon Plan 6.2
FINAL—January 2021
SECTION 6:VULNERABILITY ASSESSMENT
and other information as needed.The second part of the system is the Risk Tool.The Risk Tool will run a
risk assessment at the building level for certain hazards selected based on predetermined calculations
for each hazard.Some hazards will have a single return period and others have multi-return periods.The
availability of multi-returns periods is based on the availability of datasets for each hazard and the
degree of detail in each dataset.
The Risk Assessment produced by the Risk Tool will also identify high-risk structures in the planning area
and estimate cost by types of mitigation projects(wind retrofits,elevation,acquisition,mitigation
reconstruction)and benefit-cost estimates by type of mitigation.The mitigation tool is only meant to