20211442 Ver 1_Wetland Delineation Report_20210429

Wilmington Airport — VORTAC Replacement
New Hanover County, North Carolina
I LM
Wetland/Waters of the U.S. Delineation Report
August 2020
Prepared by:
Luke F. Eggering, SPWS
PARSONS
530 Maryville Centre Drive
Suite 400
St. Louis, Missouri 63141

Wilmington International Airport — VORTAC Replacement - Introduction
Serving southeastern North Carolina, the Wilmington International Airport
(ILM) provides the southern coast with flight options through Delta
Airlines and American Airlines/US Airways. It offers many non-stop
flights to popular destinations within the U.S., such as Philadelphia and
Washington D.C., and serves over 750,000 passengers per year.
metal gate along an unpaved road about 1,584
feet long (0.3 miles) and is situated within an
approximate 1000-foot radius vegetative cleared
area, surrounded by wetlands. The existing
access road and facility were constructed on fill
approximately 1.5 feet above the surrounding
wetlands and the existing impervious area is
0.24 acres. Large trees and other vegetation
surround the cleared area, obscuring the ILM
VORTAC facility from Holly Shelter Road to the
north (with the exception of the narrow opening
of the access road alignment), from the
industrial/commercial facilities along Barbados
Boulevard to the west and south, from Blue Clay
Road to the east, and from residences along
Sunray Road to the southeast.
The Wilmington
Airport lies within
New Hanover
County, North Carolina in the gulf coastal plain
ecoregion. The airport is north of Smith Creek and its
associated adjacent wetlands. Although historically
the Wilmington Airport was extensively graded during
the development and construction of the airport
facilities, there are some very small remnant areas
that exhibit wetland characteristics.
ILM
The existing Visual Omnidirectional Range Tactical
Air Navigation System (VORTAC) facility (4900 Holly
Shelter Road, Castle Hayne, North Carolina, 28429)
is approximately 5.1 miles northeast of the
Wilmington Airport. VORTAC is a radio -based
navigational aid for aircraft pilots consisting of a co -
located VHF omnidirectional range (VOR) beacon
and a tactical air navigation system (TACAN) beacon.
This project will replace the existing VORTAC with
doppler VORTAC.
The ILM VORTAC facility is accessed through a
fr
\9oo Holly Shelter Rd
.41
Wilmington Airport
Page 1

The purpose of this study was to examine the potential for impacts to waters of the U.S., especially
streams and wetlands, that could be affected by the VORTAC Replacement. The project is needed,
because the existing VOR has several radials that aren't working due to interference most likely due to
mature tree growth out past the 1000-foot radius. Converting to a Doppler VOR will raise the counterpoise
up 55 feet above ground level (AGL) in the air and will eliminate any interference from anything on the
ground and nothing below 80 feet at the 1000-foot radius.
Background
Based on a June 21, 2016 survey of this facility it was noted that the facility was experiencing
performance issues, and Engineering Services was tasked to find a solution. The previous survey had
identified tree growth around the facility as a primary culprit and recommended removing the trees then
rechecking facility performance. If performance was still an issue following flight check, dopplerizing the
facility and raising the counterpoise was recommended.
Following submission of our report, the program office pursued tree removal and had the entirety of the
1000-foot radius clear zone around the facility cleared of all trees and brush. A flight check of the facility
following the tree clearing revealed severe performance issues that rendered the facility unusable, and it
was removed from service.
It is worth noting that performance issues at this facility have long been a problem. Trees have been
cleared a few times in its now almost 60-year lifespan (commissioned in 1960). The VOR siting order
includes a case study of performance problems at the ILM VOR.
Following removal from service, OESG engineers evaluated the site and found that far field trees (at the
edge of the 1000-foot clear zone) were the likely culprit for the performance issues, agreeing with the
assessment Engineering Services provided. OESG engineers modeled the site and found that
dopplerizing the facility and raising the counterpoise to approximately 55 feet AGL would solve the issue.
Engineering Services recommended a counterpoise height of 35-feet less than mature tree height for the
far field trees, and the mature height of Southern White Pine is approximately 80 feet.
The existing VOR antenna and shelter, and propane tank will be removed; the existing transformer and
back-up emergency communication (BUEC) will be relocated. The elevated Doppler VORTAC facility will
consist of expanded gravel/impervious surfaces along the east and west sides of the existing gravel pad
and construction of a 4 foot wide gravel path extending 150 feet from the east side of the expanded pad
(approximately 0.31 acres), a new VOR shelter measuring 11.5 feet x 30 feet, a concrete engine
generator (EG) pad measuring 10 feet by 12 feet, a disconnect/transfer switch rack, relocation of the
transformer and back-up emergency communication (BUEC) antenna, and the installation of new conduit
lines from the VOR shelter to the TACAN monitor (which will be the same location as the existing), to
VOR monitor and relocated BUEC, and to the disconnect/transfer switch rack and transformer. The
elevated Doppler VORTAC will be 55-feet high; the relocated BUEC will be 60-feet high.
Wilmington Airport Page 1

Findings
The existing VORTAC site and proposed VORTAC Replacement location was surveyed for the presence
of waters of the U.S. including wetlands and streams on November 21, 2019. The existing VORTAC
facility and access road, that dates to the early 1960s, is situated in a large flat scrub shrub wetland area.
The facility is on fill material (primarily dirt and gravel) that is elevated slightly from the surrounding
wetland. The footprint of the fill material was mapped using a handheld global positioning unit (GPS), and
data was gathered for soils, hydrology, and vegetation in the surrounding wetland.
Soils Information - Soil Map Units on VORTAC Site
(Adapted from: Soil Survey of New Hanover County, North Carolina. U.S. Department of Agriculture, Soil
Conservation Service. April 1977)
Based upon the referenced soil survey for New Hanover County, there were four soil map units (Leon
Sand, Dorovan soils, Murville fine sand and Lynn Haven fine sand) listed for the VORTEC site, but only
two soil map units were in the impacted area (Murville fine sand and Lynn Haven fine sand).
Leon sand (Le) This nearly level, poorly drained soil is on rims of depressions, on smooth flats, and in
indefinite patterns on the uplands and stream terraces. Areas are irregular in shape and are 5 to 250
acres in size. Most of the acreage is forested. The rest is used for residential and industrial sites. The
native vegetation on undeveloped sites consists of longleaf pine, pond pine, sweetbay, water oak,
winterberry, gallberry, bracken, and, in the more nearly open areas, a dense cover of pineland three -awn
and creeping blueberry.
Typically, the surface layer is very dark gray sand 3-inches thick. The subsurface layer is light gray sand
13-inches thick. The subsoil is dark reddish brown sand 24-inches thick. The underlying layer, to a depth
of 64 inches, is light gray sand.
The organic -matter content of the surface layer is very low. Permeability is rapid in the surface layer,
moderate to moderately rapid in the subsoil, and very rapid in the underlying layer. Available water
capacity is low, and shrink -swell potential is very low. Reaction is strongly acid throughout, where this soil
has not been limed.
The seasonal high water table is at or near the surface. A seasonal high water table and leaching of plant
nutrients are the main limitations in the use and management of this soil. Most lawn grasses, shrubs, and
trees are easily established and maintained. Some soil conditioners and liberal amounts of fertilizer may
be needed in most areas.
Dorovan soils (DO) These nearly level, very poorly drained soils are in bays and in long, broad areas of
tidal and stream flood plains. All of the acreage is used for woodland and as wildlife habitat. The native
vegetation is red maple, willow, tupelo, cypress, sweetgum, ash, American cyrilla, and greenbrier.
Typically, the surface layer is black muck 4-inches thick. The underlying layer, to a depth of 64 inches, is
black or very dark gray muck. Included with these soils in mapping are small areas of Johnston soils and
Tidal marsh. A few small areas of soils that have thin, continuous mineral layers are also included.
The organic -matter content in the surface layer is very high. Permeability is very slow, available water
capacity is very high, and shrink -swell potential is low. Reaction is very strongly acid or strongly acid
throughout, unless the soils are limed. The seasonal high-water table is at or near the surface. These
soils are frequently flooded for very long periods.
Wilmington Airport Page 2

Flooding and high organic -matter content are the main limitations in the use and management of these
soils. If these soils are drained and tilled, the organic matter decomposes, and the soil subsides.
Dorovan soils are found to the southwest, south, and southeast of the airport all in the floodplain and
adjacent to Smith Creek.
Murville fine sand (Mu) This nearly level, very poorly drained soil is in flat or slightly depressional areas.
Areas are irregular in shape and range from small to very large. Most of the acreage is forested. The rest
is used for residential and industrial sites. The native vegetation is longleaf pine, pond pine, red maple,
water oak, redbay, sweetbay, American cyrilla, greenbrier, and pineland three -awn.
Typically, the surface layer is black fine sand 8-inches thick. The subsoil is black fine sand 37-inches
thick. The underlying material, to a depth of 70 inches, is pale brown fine sand in the upper part, sandy
clay loam and sandy loam in the middle part, and fine sand in the lower part.
Included with this soil in mapping are small areas of Lynn Haven, Leon, and Pamlico soils. Also included
are small areas of soils that have a much thicker subsoil than the Murville soils.
The organic -matter content of the surface layer is low. Permeability is rapid in the surface layer and
moderately rapid in the subsoil. Available water capacity is low, and shrink -swell potential is low. The
seasonal high-water table is at or near the surface. This soil is frequently flooded for brief periods. A
seasonal high-water table and rapid and moderately rapid permeability are the main limitations in the use
and management of this soil.
Lynn Haven fine sand (LY) This nearly level, poorly drained soil is in broad, almost level to flat or
depressional areas on uplands. Areas are irregular in shape and small to large in size. Most of the
acreage is forested. The rest is used for residential and industrial sites. The native vegetation consists of
longleaf pine, pond pine, red maple, water oak, American cyrilla, greenbrier, fetterbush, and pineland
three -awn.
Typically, the surface layer is black fine sand 18-inches thick. The subsurface layer is gray fine sand
6-inches thick. The subsoil is 34-inches thick. It is sand that is black in the upper part, black and dark
brown in the middle part, and dark brown and brown in the lower part. The underlying layer, to a depth of
75 inches, is pale brown sand in the upper part and light brownish gray sandy loam and dark greenish
gray sandy clay in the lower part.
Included with this soil in mapping are small areas of Murville, Leon, and Torhunta soils.
The organic -matter content of the surface layer is low. Permeability is rapid in the surface layer and
moderate and moderately rapid in the subsoil. Available water capacity is low, and shrink -swell potential
is very low. Reaction is strongly acid to extremely acid throughout where this soil has not been limed.
Unless this soil is artificially drained, the seasonal high-water table is at or near the surface during periods
of heavy rainfall. This soil is frequently flooded for brief periods. A seasonal high-water table is the main
limitation in the use and management of this soil. Most lawn grasses, shrubs, and trees are fairly easily
established and maintained.
The soils at the VORTEC site generally very dark or gray with a matrix of 2.5Y4/1 — 2.5Y6/1. Redox
features ranged from gray/yellow mottling 2.5Y7/2 to bright orange 2.5Y 6/8.
Climate
Climate affects the physical, chemical, and biological relationship in the soil, mainly through the influence
of precipitation and temperature. Water dissolves minerals, is necessary for biological activity, and
Wilmington Airport Page 3

transports minerals and organic residue through the soil profile. The amount of water that actually
percolates through the soil is dependent mainly on the amount and duration of rainfall, relative humidity,
evapotranspiration, length of the frost -free period, and soil characteristics. Temperature influences the
kind and growth of organisms and the speed of physical and chemical reaction in the soils.
The climate of New Hanover County is warm and humid. Precipitation is well distributed. The relatively
mild temperatures and the abundant moisture cause rapid decomposition of organic matter and speed up
chemical reactions in the soil. The high rainfall leaches out large amounts of soluble bases, and less
soluble, fine materials are moved deeper in the soil. The average annual rainfall is approximately 53.5
inches, and the average annual growing season is approximately 226 days.
Wetlands and Surface Water Survey
The specific objective of the wetland and surface water survey was to identify potential wetlands and
other waters of the U.S. occurring within and immediately adjacent to the proposed VORTAC
Replacement facility. The wetland resources in terms of wetland type, size, and functional value were
documented.
Section 404 of the Clean Water Act (CWA) extends authorization to the U.S. Army Corps of Engineers
(USACE) to regulate activities that affect waters of the U.S., including wetlands. The USACE issues
Section 404 permits for the discharge of dredged or fill material into wetlands and other waters of the U.S.
Using the guidelines and procedures defined in the 1987 U.S. Army Corps of Engineers Wetland
Delineation Manual and the Regional Supplement to the Corps of Engineers Wetland Delineation Manual:
Atlantic and Gulf Coastal Plain Region (Version 2.0), the presence of wetlands was examined. The
USACE manual and regional supplement provides technical guidance and procedures for identifying and
delineating wetlands that may be subject to regulatory jurisdiction under Section 404 of the Clean Water
Act or Section 10 of the Rivers and Harbors Act. The regional supplement addresses regional wetland
characteristics and improves the accuracy and efficiency of wetland -delineation procedures. Wetlands are
defined by the USACE as "areas that are inundated or saturated by surface or ground water at a
frequency and duration sufficient to support, and under normal circumstances do support, a prevalence of
vegetation typically adapted for life in saturated soil conditions." Wetlands generally include swamps,
marshes, bogs and similar areas. (USACE, 1987). The USACE three -parameter approach (hydrology,
soils, and vegetation) was applied to make routine wetlands determinations in the field. This approach
requires an on -site inspection of the vegetative composition, soils, and hydrology of an area to make
wetland determinations. At least one positive wetland indicator for each parameter must be evident for a
positive wetland determination. General diagnostic characteristics for each parameter distinguish
wetlands from non -wetland or upland areas. These characteristics are described below for each
parameter.
Potential wetlands were preliminarily identified within the study area by reviewing existing Natural
Resources Conservation Service (NRCS) soil survey maps (Attachment 1), U.S. Geological Survey
(USGS) 7.5 minute topographic maps (Attachment 2), U.S. Fish and Wildlife Service (USFWS) National
Wetlands Inventory (NWI) maps (Attachment 3), FEMA floodplain mapping (Attachment 4), and aerial
photographs. The USGS maps show the wetland symbol for the project area, and the NWI wetland map
indicates that the area is freshwater forested/shrub wetland (PSS3/4Bd). Field surveys were conducted to
confirm the presence or absence of wetlands within the proposed VORTAC Replacement facility.
Wetland vegetation generally consists of macrophytes that are typically adapted to areas that are at least
periodically inundated or saturated by surface or groundwater. These hydrophytic species, due to
morphological, physiological, and/or reproductive adaptations, have the ability to grow, compete,
Wilmington Airport Page 4

reproduce, and/or persist in anaerobic soil conditions, which develop in wetland soils due to inundation or
prolonged saturation. Indicators of hydrophytic vegetation include more than 50 percent of the dominant
plant species having a regional indicator status of obligate wetland (OBL), facultative wetland (FACW), or
facultative (FAC). In addition, morphological plant adaptations, such as buttressed trunks, adventitious
roots, and floating leaves, are also considered indications of hydrophytic vegetation.
Wetland soils are classified as hydric or possess characteristics that are associated with reducing soil
conditions. Indicators of hydric soils include presence of organic soils (peats or mucks), histic epipedons,
sulfidic materials, gleyed soils, soils with distinct mottles and/or low chroma matrix, and presence of iron
and manganese concretions, among others.
Wetland hydrology is defined by an area that is inundated either permanently or periodically at mean
water depths less than or equal to 6.6 feet, or the soil is saturated to the surface at some time during the
growing season creating reducing soil conditions. Indicators of wetland hydrology include, but are not
limited to, the presence of drainage patterns, sediment deposition, water marks, and visual observations
of inundation or saturation.
Summary Description of Wilmington Airport VORTAC Replacement Wetlands
The existing VORTAC site and proposed VORTAC Replacement location was surveyed for the presence
of waters of the U.S. including wetlands and streams on November 21, 2019. The existing VORTAC
facility and access road, that dates to the early 1960s, is situated in a large flat wetland area. The facility
is on fill material (primarily dirt and gravel) that is elevated slightly above the surrounding wetland. The
footprint of the fill material was mapped using a handheld global positioning unit (GPS), and data was
gathered for soils, hydrology, and vegetation in the surrounding wetland. The wetland data and
photographs are presented in Appendix A.
Vegetation Summary
The vegetation in the effected portion of the VORTEC replacement site has been altered recently as the
entire 1000-foot area around the existing facility was clear-cut to improve the performance of the
VORTAC equipment. Natural succession has already begun in the former forested plant community.
Within small depressions and drainageways, herbaceous plants and shrubs have become established. A
diversity of plants can be seen in these small areas with various sedges, grasses, shrubs, and broadleaf
plants. Typical species included: red maple (Acer rubrum), wax myrtle (Morella cerifera), sweetbay
(Magnolia virginiana), pineland threeawn (Aristida stricta), southern bayberry (Morella caroliniensis), and
bunched beaksedge (Rhynchospora cephalantha).Wetland data sheets and photographs in Appendix A
show the typical vegetation of the area.
Hydrology Summary
With an average precipitation rate of over 53.5 inches of rain per year combined with the extensive
impervious surfaces in the vicinity of the VORTAC site, the primary hydrology for the area is from direct
precipitation and runoff. The generally flat to depressional wetlands appear to remain saturated and/or
inundated for extended periods during the growing season. Evidence in some areas includes the
inundated equipment ruts from clear -cutting equipment and some small inundated depressions.
According to the FEMA mapping (Zone X), overflow flooding from the Northeast Cape Fear River, which
could contribute to the hydrology of this wetland, would be very infrequent.
Wilmington Airport Page 5

Soils Summary
The soils at the VORTEC site generally very dark or gray with a matrix of 2.5Y4/1 — 2.5Y6/1. Redox
features ranged from gray/yellow mottling 2.5Y7/2 to bright orange 2.5Y 6/8. They match the Sandy
Redox (S5) hydric soil indicator.
Wetland Summary
The wetlands on the VORTAC facility property would likely be considered jurisdictional, because they are
adjacent to other waters of the U.S. including unnamed tributaries to the Northeast Cape Fear River and
Prince George Creek.
The VORTAC scrub shrub wetland is over 8 acres in size. As currently designed, the wetland impacts
would be approximately 0.19 acres (temporary wetland impact 0.05 acres + permanent wetland impact
0.14 acres. The existing VORTAC fill is approximately 0.33 acres.
For permitting purposes, Nationwide Permit No. 3 (Maintenance) would likely be applicable. An online
Pre -Construction Notification (PCN) to the Wilmington District Engineer will be prepared, because there
will be a minor amount of fill (i.e. 0.19 acres) in a special aquatic site (wetland).
Wilmington Airport Page 6

Figure 1. Wilmington Airport VORTAC Replacement Wetland Map showing the existing conditions
Upland Datapoint1y
VORTAC Replacement Site
New Hanover County, North Carolina
Data Sheet Point
Survey Area
Wetland
Wilmington Airport
Page 7

Figure 2. Wilmington Airport VORTAC Replacement Plans.
Wilmington Airport Page 8

Attachment 1. Soils Information.
r:
MEM
Sod Map —New Hanover County, North Carolina
(WiilmingtonArgon- Wilmington. North Carolna)
M
MUM
MZIEI
I I 1 I I I I I I 1 I
ZAGM .Mill 111 OEM 'ram ::Lm J®
r ;
My 1:9,710 if [Mod cr A Wilma(11" s BS) shoe 4
Mess
il
0 tI MDr� v -s � EEC�x
Kw, pvpT:., vat, HetM1tt C:lr.r W2594 fxfpe OM LAN Zrne LIA W35234
t•Y Natural Resources
Conserration Service
Web So l Survey
Natonal Cocpe+aove oil purvey
1U25r2D 9
Page 1 of 3
Wilmington Airport
Page 9

Soil Map —Neer Hanover Comity, North Carolina
(Wilmington Aiport - Wilmington, North C arolna)
MAP LEGEND
Area of Interest (AOI) gi. spoil Area
Area ar interest {A019
— 0 Stony Spot
saleC2, Very SAX Spot
Sol Map Urn Polygons
tyei spot
+., Sol Map urri unes
0 sal Map Urti Paints Cotner
.. Sped] Une Features
Special Point Features
Blowout Water Features
Streams and Canals
Borrow PI1
Trans portalcn
` Clay Spot +i-+ RallS
c. Closed Depression
rr Interstate HIprays
Gravel Ph US Roles
Gravelly Spat kiaJorRoads
Landoll
Local Roads
j, Lava Flow
f} Becltwormd
Ad, Marsh nrswamp ■ APO] Phologlaphy
,R Pine cc Quarry
Macellaneous Vwaier
Perennial water
RDA Dutcrop
+ nine spit
Sandy Spot
Severely Eroded Spd
Slrtlhde
SIIde ar Slp
is SodcSPot
MAP INFORMATION
The sail surreys that comprise your AOl were mapped at
1:1 ti,&Hi.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mappng can cause
misunderstanding of the detail or mapping and accuracy of soil
foe placement The maps do not show the small areas of
contrasting soils that could have been shown at a more detaied
scale.
Please rely on the bar scale cn each map sheet for map
measurements.
Source of Map: Natural Resources Conry seation Service
Web Soil Survey URL:
Coordinate System: Web Mercator{EPSG:3B57)
Maps from the Web Soil Survey are based on the Web Mercator
projection. which presences diecticn and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance ar area are required.
This product is generated tarn the USDA-NRCS certified data as
of the version dates) listed below
below
Soil Survey Area: New Hanover County, North Carolina
Survey Area Data: Version 20, Sep 16, 2019
Soil map units are labeled {as space allows}for map scales
1:50,O00 or larger.
Dates) aerial images were photographed: Nov 21. 201E—Now
2B, 201E
The orthophota or other base map on which the sail Iles were
compled and digitiied probably differs from the background
inagery displayed on these maps. As a result, some mnor
shifting of map whit boundaries may be evident.
USDA
aME
Natural Resources Web Soil Survey
Conservation Service National Cooperative Soil Survey
10J2502019
Page 2 of 3
Wilmington Airport
Page 10

Soil Map —New HanoverCounty, North Carolina
Wilmington Airport - Wilmington,
North Carolina
Map Unit Legend
Map Unit Symbol
Map Unit Name
Acres in AOI
Percent of AOI
Be
Bayrneade fine sand, 1 to 6
percent slopes
2.2
0.8%
DO
Dorovan soils
6.1
2 1%
JO
Johnston soils
2.1
0.7%
Kr
Kureb sand, 1 to 8 percent
slopes
8.4
2.9%
Le
Leon sand
45.3
15.6%
Ly
Lynn Haven fine sand
35.7
12 3%
Mu
Murville fine sand
184.6
63.4%
Se
Seagate fine sand
4.9
1 7%
St
Stallings fine sand
1.8
0.6%
Totals for Area of Interest
291.1
USDA Natural Resources Web Sail Survey
Conservation Service National Cooperative Soil Survey
1012512019
Page 3 of 3
Wilmington Airport
Page 11

Attachment 2. USGS Quadrangle Excerpts.
Castle Hayne, North Carolina Quadrangle, 2016
Scotts Hill, North Carolina Quadrangle, 2019
77'52.30•
2 3337 004 FEET 234 235 34`22'2
-77.8750°
34.3750' 236°°°"`E 37 38
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Wilmington Airport
Page 12

Attachment 3. National Wetland Inventory Map
U.S. Fish and Wildlife Service
1-24,553
02 04
August 19. 2020
Wetlands
111 Estuarine and Marine Deepwater
▪ Estuarine and Marine Wetland
Wilmington Airport VORTAC Replacement
❑ Freshwater Emergent Wetland ▪ Lake
Freshwater Forested/Shrub Wetland ❑ Other
❑ Freshwater Pond ❑ Rlverine
This maps fa general reference or*.. The US Fish and Wildlife
Service is not responsible for the acctr*ey or currentness of the
base data shown on this map. All wetlands related data should
be used hih accordance with the layer metadata frond on Vie
Wetlands Mapper web site.
Naumal wetlands 'mutiny INWI1
Ts page WAS prntluceo by me NM mapper
Wilmington Airport
Page 13

Attachment 4. FEMA Floodplain Information
National Flood Hazard Layer FIRMette
FEMA
AREA OF
17?0.12.3?0014
t'tf.2/1.6f2007
3 72 03231001<
} Pff. 44jJ4F/a01
est
MINIMAL FLOOD
Zone X
NEW H aNO' R
37O!
372032 4200 K
eft-. 2 /16/2007
17201211001-;
ef1.0/20/2010
Red
0 250 500
1000
1,500
Feet
2,000
1:6,1300
77°52'IG"b'; 34°2047-N
Legend
SEE Fl5 REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT
SPECIAL FLOOD
HAZARD AREAS
Without Base Rood Elevation {BFE)
Zone A, V..A99
With BEE or Depth zone os AO rw. vAR
Regulatory Floodway
OTHER AREAS OF
FLOOD HAZARD
OTHER AREAS
GENERAL
STRUCTURES
OTHER
FEATURES
MAP PANELS
0
0 2% Annual Chance Flood Hazard. Areas
of 1% annual chance flood with average
depth less than one foot or with drainage
areas of less than one square mile zone x
Future Conditions 1% Annual
Chance Flood Hazard zone x
'/rArea with Reduced Flood Risk due to
Levee. See Notes. zone x
7//
Area with Flood Risk due to Levee Zone D
No SCREEN Area of Minimal Flood Hazard zone
11 Effective LOMRs
Area of Undetermined Flood Hazard zoneo
— - Channel. Culvert, or Storm Sewer
mini Levee, Dike, or Floodwall
M2 Cross Sections with 1% Annual Chance
ws Water Surface Elevation
— — Coastal Transect
--^ su --- Base Flood Elevation Line [BM
Limit of Study
Jurisdiction Boundary
--- Coastal Transect Baseline
Profile Baseline
Hydrographic Feature
Digital Data Available
No Digital Data Available
Unmapped
The pin displayed on the map is an approximate
point selected by the user and does not represent
an authoritative property location.
This map complies with FEMA's standards for the use of
digital flood maps if it is not void as described below.
The basemap shown complies with FEMA's baseman
accuracy standards
The flood hazard information is derived directly from the
authoritative NFHL web services provided by FEMA This map
was exported on 8/17/2020 at 1220 PM and does not
reflect changes or amendments subsequent to this date and
time. The NFRL and effective information may change or
become superseded by new data over time_
This map image is void if the ore or more of the following map
elements do not appear: baseman imagery, flood zone labels,
legend, scale bar, map creation date, community identifiers,
FIRM panel number, and FIRM effective date_ Map images for
unmapped and unmodemized areas cannot be used for
regulatory purposes.
Wilmington Airport
Page 14

Appendix A. Wetland Data Sheets and Photographs
Wilmington Airport Page 15