20180760 Ver 2_Modification Request Attachment_20210413 (2)

DIVISION OF COASTAL MANAGEMENT
FIELD INVESTIGATION REPORT
APPLICANT'S NAME: New Hanover County Airport Authority
2. LOCATION OF PROJECT SITE: 1740 Airport Boulevard adjacent to an unnamed tributary of Smith Creek, in New Hanover
County.
Latitude: 34°15'41.62" N Longitude: 77°54'44.71" W
3. INVESTIGATION TYPE: D & F
4. INVESTIGATIVE PROCEDURE: Dates of Site Visit - 6/23/2020 & 1/11/2021 Applicant Present - Yes
5. PROCESSING PROCEDURE: Application Received-12/2212020 (initial) 3/8/2021 (complete)
Office— Wilmington
6. SITE DESCRIPTION:
(A) Local Land Use Plan - City of Wilmington/New Hanover County
Land Classification From LUP - Airport Industrial District
(B) AEC(s) Involved: PTA
(C) Water Dependent: Yes
(D) Intended Use: Commercial
(E) Wastewater Treatment: Existing - CFPUA
Planned - N/A
(F) Type of Structures: Existing - Runways, airplane taxiways, airport terminal building, parking Tots, and accessory
buildings.
Planned - Stream stabilization with grading and installation of articulating concrete block
geogrid and rip rap.
(G) Estimated Annual Rate of Erosion: N/A
Source - N/A
7. HABITAT DESCRIPTION:
[AREA]
DREDGED
FILLED
OTHER
(A) Open water
(Stream)
-855 ft2
(B) Other (Highground)
-159 ft2
2,310 ft2
(disturbed)
(D) Total Area Disturbed:-3,324ft2 (- 0.076 acres)
(E) Primary Nursery Area: No
(F) Water Classification: C; Sw
Open: Closed
8. PROJECT SUMMARY: The applicant proposes to grade eroding stream banks, line the channel with an articulating
concrete block system and rip rap, and improve the perimeter fence.

New Hanover County Airport Authority
Page 2
9. PROJECT DESCRIPTION:
The Wilmington International Airport is located at 1740 Airport Boulevard Road (off North 23rd Street) in Wilmington, New
Hanover County and is adjacent to Smith Creek. To locate the project site from NC Highway 17, travel north on North 23rd
Street for approximately 2 miles to the intersection of Airport Boulevard. Turn right onto Airport Boulevard. Access to the
project site is restricted due to FAA security regulations and can be accessed by escort from the Airport Authority staff. You
may contact the airport Facilities Director Dick Granseur [phone] at the Wilmington International Airport to schedule
a site visit.
The Wilmington International Airport consists of an ai rport terminal, parking, hangars, runways, roadways, approach lighting
systems including catwalk and light bars, and associated facilities. The Wilmington International Airport is located on a
large tract totaling 1,340 acres and is a mix of wetlands and uplands with an average elevation of 7 feet above Normal High
Water (NHW). The adjacent properties surrounding the project site are a mix of undeveloped uplands, commercial and
residential properties. The project site is located within the active airfield, which is maintained/mowed regularly to manage
vegetation at very low heights as required by the FAA.
The project area is located within the 1,340 acre Wilmington International Airport, specifically the drainage area located in
the active airfield adjacent to the Runway Safety Area (RSA) of Runway 6 (See Figure 1). The project area includes
approximately 316' of unnamed tributary (UT) or Stream 1 that drains to inland waters of Smith Creek. The 316' of Stream
1 runs from the culvert under the perimeter road to the next culvert located under the CFPUA sewer maintenance access
road on the outside of the perimeter fence. The proposed stream impacts can be separated by jurisdictional and non -
jurisdictional impacts. The Public Trust jurisdictional area consists of 41 linear feet of navigable tidally influenced stream. A
perimeter fence exists, above which the stream is no longer considered navigable, and therefore the 30' Public Trust Area
of Environmental Concern (AEC) extends upstream of the perimeter fence. There is 31 linear feet of stream within the 30
ft. Public Trust Shoreline AEC for a total of 72' of jurisdictional stream in this area. The non -jurisdictional project area
extends from the end of the AEC, 244' upstream to the culvert under the perimeter road (see Figure 2). According to the
applicant, the project area receives water from historically channelized stormwater conveyances draining an area that is
approximately 37 acres. Vegetation inside the perimeter fence is primarily upland grasses and is consistently maintained
per FAA requirements. Vegetation on the outside of the fence consists of typical disturbed upland shrub / scrub species,
such as wax myrtle, pines, and small bays. Based on the site visit performed by Patrick Amico and Robb Mairs on
6/23/2020 no Coastal Wetlands are in the project area. Coastal Wetland species were noted downstream of the project
area closer to Smith Creek. Two sanitary sewer force mains traverse the project area. The 24" force main traverses the
project area in the vicinity of the perimeter fence approximately 2' under the proposed finish grade. The second force main
is 30" in diameter and crosses the project area outside of the perimeter fence approximately 6' below grade (see Figure 4).
Stream 1 is considered to have a !ow functional value according to North Carolina Stream Assessment Method (NCSAM)
assessment provided in the application package.
Two State permits have been previously issued to the Wilmington International Airport. State Permit No. 87-18, issued on
August 10, 2018 authorized impacts to streams and wetlands by installing concrete culvert pipe to mitigate wildlife attraction
in wetland areas within the airfield. State Permit No. 87-18 expires on December 31, 2021. State Permit No. 16-10, issued
on February 5, 2010 authorized expansion of a concrete platform over wetlands as a part of FAA required improvements
associated with runway alignment indicator lights. State Permit No. 16-10 expired on November 25, 2014.
The New Hanover County Land Use Plan classifies the high ground portion of the property as Commerce and the wetland
areas as Conservation. The waters of Smith Creek are classified C; Sw by the Division of Water Resources (DWR), and
they are CLOSED to shellfishing. This section of Smith Creek and its tributaries are NOT designated as a Primary Nursery
Area (PNA) by the N.C. Division of Marine Fisheries (DMF).

New Hanover County Airport Authority
Page 3
PROPOSED PROJECT:
The applicant proposes to grade eroding stream banks, line the channel with an articulating concrete block system and
rip rap, and improve the perimeter fence. Excessive erosion in Stream 1 has resulted in excised unstable banks that
continuously wash sediment downstream into Smith Creek. According to the applicant, the perimeter fence has been
undermined and damaged in the vicinity of the stream creating entry ways into the RSA for both people and wildlife.
The proposed project is necessary to meet FAA requirements for public safety by restricting access to airfield areas to
mitigate the likelihood of wildlife strikes. The application indicates that the entire length of Stream 1, 316' in length by a
maximum of 66' in width (86,856 sq.ft.) will be graded to a 3:1 slope. Within the 316' of stream, 72' of stream is
considered within Areas of Environmental Concern (AEC). Due to stream meanders and erosion areas, 72' of
jurisdictional stream is within a 60' long area of the Public Trust AEC. The following impacts are only for the areas of
Public Trust and the 30' Public Trust Shoreline AEC within the project area. Grading in the stream bed or below
NHW would measure approximately 62' in length by 3' in width by 19" deep on average for an estimated total of 11
cubic yards (cy) removed. Grading proposed for the stream slope would measure approximately 62' in length by 13'
in width by 13.5" deep on average for an estimated total of 34 cy removed. Additional grading would occur outside the
adjacent stream slopes to achieve the proper 3:1 slope and would measure approximately 53' in length by 44' in width
by 4.5" deep on average for an estimated total of 32 cy removed. A total of 77 cy of eroding, unconsolidated material
is proposed to be excavated from the stream edges, bed, and banks in preparation for installing the articulating block
system and rip rap (Figure 5). Grading and slope preparation would also occur outside of the jurisdictional areas with
an estimated 255 cy of dirt to be removed. Following grading in and around the stream, pervious articulating concrete
block and rip rap would be installed to line the banks and the bottom of the stream within the impacted areas described
above. Articulating concrete block would be installed in the bed and banks of the graded stream from the perimeter
road to the fence in an area measuring approximately 30' by 16.3' for a total of 489 sq.ft., 407 sq.ft. of which is
proposed to be installed below NHW. An area measuring approximately 32' by 16.4' for a total of 525 sq.ft of rip rap
would be installed beginning under the fence to the culvert at the downstream end of the project area, 448 sq. ft of
which would be installed below NHW (See page 5 of 7 in the Narrative). Areas of disturbance landward of the rip rap
and articulating concrete block will be stabilized using seed and matting or other means of erosion control.
According to the applicant, all work will occur during dry conditions. The upstream culvert pipe will be blocked, and any
stormwater drainage will be pumped around the project area into the downstream portion of the UT. Similarly, the
downstream culvert will be blocked to prevent tidal flow from entering the project area. The applicant proposes to
relocate the perimeter fence to the top of the downstream culvert temporarily during the proposed grading and
installation of the articulating concrete block. The fence would be placed back in its current location with the addition of
smooth metal bars placed every 4" on center at the bottom of the fence secured in a concrete beam measuring 12' in
length by 12" in width and 12" in height below ground, under the riprap. The concrete to hold the bars in place would
be new impervious surface within the AEC with approximately 3 sq.ft. below NHW and 13 sq.ft above NHW.
Additionally, a concrete headwall would be constructed at the upstream culvert outfall, located outside of the AEC, to
mitigate future erosion around the pipe outfall. Compensatory mitigation is proposed at a 0.5:1 ratio since the
proposed project does not include avoidance or minimization efforts for impacts to jurisdictional waters. According to
the applicant the stabilization of the stream bed and bank will improve water quality downstream as a.result of reduced
sedimentation caused by erosion. The 0.5:1 mitigation ratio is proposed due to the low functional value determined
using NCSAM and the overall water quality improvement. Using the proposed mitigation ratio, 122 linear feet of
freshwater non -tidal stream credits and 36 linear feet of freshwater tidal stream credits would be purchased through the
North East Cape Fear Umbrella Mitigation Bank (NECFUMB). A Letter of Availability is provided by the applicant.
10. ANTICIPATED IMPACTS:
The proposed project area consists of high ground, and Public Trust Areas including open water (freshwater tidally
influenced stream). A total area approximately 3,324 sq. ft. is proposed to be disturbed by grading activities. The proposed
stabilization using articulating concrete block and rip rap in jurisdictional areas would fill a total of approximately 855 sq.ft.
below NHW and fill approximately 159 sq.ft. above NHW within the graded area in the AEC. Approximately 2,310 sq. ft. of
the graded area would be stabilized using vegetated erosion control methods. Approximately 16 sq.ft. of impervious

concrete would be located below the riprap within the AEC to support the metal rods that would extend from the fence to
help ensure public safety and comply with FAA rules and regulations (See tables on page 5 of 7 in the Narrative). The
proposed stabilization would be located in Sw waters with no SAV habitat, temporary increased in turbidity during the
project are expected.
Submitted by: Katharine Elks
Date: 3/16/2021 Office: Wilmington

IIIOur People. Your Success.
WithersRavenel
March 4, 2021
NC Division of Coastal Management
Wilmington Regional Office
Katharine Elks
127 Cardinal Drive Ext.
Wilmington, NC 28405
Re: Wilmington International Airport - FEMA Ditch/Drainage Runoff Mitigation
Wilmington, New Hanover County
CAMA Major Development Permit Application Submittal
WR Project #03110288.60
Dear Ms. Elks:
The New Hanover County Airport Authority requests a CAMA Major Development Permit for the
Ditch/Drainage Runoff Mitigation project at the Wilmington International Airport (ILM). The
proposed project is located at the Wilmington International Airport at 1740 Airport Blvd in
Wilmington, New Hanover County, North Carolina (Lat: 34.260964°N; Long:-77.913153°W).
The Wilmington International Airport (PARID: PID: R04200-001-025-000) is in the Cape Fear
River Basin (HUC 03030007) and onsite waters drain to Smith Creek. The Water Quality
Classification for Smith Creek is C;Sw and the Stream Index Number is: 18-74-63. Smith Creek is
classified as an "Inland Water" by the NC Division of Marine Fisheries.
Proposed Project
The purpose of the proposed project is to meet FAA requirements by mitigating public safety
hazards associated with aircraft travel by preventing human and wildlife access within the airfield
at the project location to improve aircraft safety. The proposed project will address excessive
erosion within the stream feature (Stream 1) resulting from extraordinary rainfall and flooding from
Hurricane Florence which destabilized the channel. Stream 1 is the outlet for the stormwater
drainage system for approximately 37-acres within the airport. The erosion within the channel
continues to get worse with each heavy rainfall event and has eroded out a large area underneath
the perimeter security fence. The erosion continues to widen the channel at the perimeter security
fence, resulting in the airport maintenance regularly having to block the new holes under the fence
with metal rods. The metal rods then catch debris, which causes the stream to erode around the
metal posts, creating a constant maintenance issue. The frequent undermining of the perimeter
security fence poses a significant security risk, as the erosion creates access points into the airfield
for both humans and wildlife at the Runway 6 approach. The erosion and sedimentation have
also created conditions within the channel that is attracting wildlife. These conditions create a
safety issue as Stream 1 is within the Runway 6 Approach and approximately 800 If from the end
of Runway 6, greatly increasing the likelihood of a wildlife strike with an aircraft. In 2018, a small
passenger aircraft struck a coyote on the runway, and the proposed project is critical to improving
aircraft and public safety.
MAR 0 4
219 Station Road, Suite 101 Wilmington. NC 28
t: 910.256.9277 I www.withersravenel.com License N !l.MIN TON, NC
I
a 4:
Asheville I Cary I Greensboro I Pittsboro j Raleigh I Wilmington

Wilmington International Airport
FEMA Ditch/Runoff Drainage Mitigation Project
II.WithersRavenel
Our People You Succes,
Additionally, the head cut from the erosion has progressed approximately 300 If upstream from
the perimeter security fence to the perimeter road culvert in approximately 18-months. If not
addressed, the erosion will undercut the perimeter road culvert and continue upstream,
threatening the integrity of Runway 6. Since the initial damage to the stream channel and ensuing
erosion resulted from flooding from Hurricane Florence, the proposed project is being funded by
FEMA. FEMA prepared a Record of Environmental Consideration (REC) in accordance with NEPA,
which determined that the proposed project met conditions for authorization under a CATEX
category *N9 - Federal Assistance for Flood Hazard Reduction Actions. The FENIA REC has been
provided as an attachment.
The proposed project proposes to permanently impact Stream 1, of which approximate 72 If is
tidal and 244 If is non -tidal. The project proposes to grade the slopes of the channel and
surrounding areas to a 3:1 slope and line the entire channel with an articulating concrete block
geogrid system and riprap which will permanently stabilize the channel and prevent future erosion
and undermining of the perimeter security fence, permanently eliminating the reoccurring safety
issue at this location. The articulating concrete block liner is pervious, allowing water to infiltrate
through it, as well as vegetation to grow up through it and has been used to successfully stabilize
other onsite stormwater swales at ILM (see Photo Documentation).
The stream channel will be lined from the existing perimeter road culvert to an existing culvert
approximately 30 ft southwest of the existing security fence. This culvert is located within the
CFPUA sewer maintenance access road. The articulating block will be installed within the stream
from the perimeter road culvert to the security fence, with the section of stream from the security
fence to the downstream culvert lined with riprap to dissipate flow, stabilize the channel, and
protect the culvert from erosion and undercutting. A concrete headwall will be constructed on the
upstream end of the existing culvert to provide permanent stabilization and protection of the
culvert. Additionally, a concrete headwall will be constructed on the downstream end of the
perimeter road culvert.
The perimeter security fence will be temporarily relocated over the existing culvert to the
southwest during construction but will be reconstructed in its current location once construction
is complete. Metal bars will be installed extending from the bottom of the fence through the
channel to provide prevent access under the fence by wildlife or humans. The metal bars will be
installed approximately 4" apart and will be anchored in a 12" long x 12" wide x 12" high concrete
beam that will be installed below ground directly below the fence (see Figure 3 in Impact Maps).
A portion of Stream 1 inside of the perimeter security fence is an inland -tidal stream. However,
per previous NCDCM determinations on similar projects at the Wilmington International Airport,
CAMA jurisdiction stops at the existing security fence as the portions upstream of the perimeter
security fence are not navigable. Therefore, the tidal portions of Stream 1 upstream of the security
fence are considered Section 404/10 waters but are not subject to CAMA jurisdiction. The portion
of Stream 1 downstream of the security fence is considered navigable waters subject to CAMA
jurisdiction.
The completion of the project will increase aircraft and public safety as part of the normal daily
operation and activities associated with the operation of the airport. Please note that the
proposed project will not create any additional impervious area and will not change the existing
volume of stormwater drainage discharging into downstream portions of Stream 1.
MAR 04
: CM WILMINGTON, NC
Page 2 of 7

Wilmington International Airport
FEMA Ditch/Runoff Drainage Mitigation Project
. 11WithersRavene
Our People You, Success
Project History
Since the initial damage to the stream channel and ensuing erosion resulted from Hurricane
Florence, the proposed project is being funded by FEMA. FEMA prepared a Record of
Environmental Consideration (REC) in accordance with NEPA, which determined that the
proposed project met conditions for authorization under a CATEX category *N9 - Federal
Assistance for Flood Hazard Reduction Actions. The FEMA REC has been provided as an
attachment.
An onsite pre -application meeting was conducted with Patrick Amico with the NC Division of
Coastal Management (NCDCM) and Robb Mairs with the NC Division of Water Resources
(NCDWR) was conducted on 6/23/2020 to review Stream 1 and determine the limits of tidal
influence and discuss the proposed project. The limits of tidal influence are depicted in the
attached CAMA plans and exhibits.
An additional onsite pre -application meeting was conducted with Katharine Elks (NCDCM) and
Joanne Steenhuis (NCDWR) on 1/11/2021 to review and discuss the project.
The 30' CAMA AEC, as confirmed by NCDCM staff, extends 30 ft northeast of the perimeter
security fence and into the project area as shown on the attached CAMA Impact Plans and exhibits.
In addition to the two onsite pre -application meetings with NCDWR, WithersRavenel submitted a
the NCDWR Pre -Filing Meeting Request on 12/29/2020. A copy of the submittal confirmation
has been provided as an attachment to this application. Therefore, the requirement for requesting
a pre -filing meeting under 40 CFR Part 121 for 401 Certifications in accordance with the federal
Clean Water Act have been satisfied.
WithersRavenel completed a delineation of the project area in June 2020. There are no wetlands
within the project area. The only jurisdictional feature present is Stream 1, of which 72 If is inland -
tidal and 244 If is non -tidal. A Preliminary JD Exhibit and upland data form have been provided in
support of the delineation. Please note that we are not requesting issuance of a JD in conjunction
with issuance of the 404 permit from the USACE.
The Wilmington International Airport has received authorizations for three previous Wildlife
Hazard Mitigation projects that involved removal of wildlife habitat as required by the FAA. The
projects were:
• ILM Runway 24 Wildlife Hazard & NAVAID Critical Area Mitigation - 2014
o USACE 404 individual Permit (AID# SAW-2011-00455)
o NCDWR Individual 401 WQC (Project #13-1263)
• ILM Wildlife Hazard Mitigation Project - 2017
o USACE NWP 39 (AID# SAW-2016-00075)
o NCDWR 401 WQC (Project #2017-0798)
• ILM Wildlife Hazard Mitigation Project for Wet Detention Basins and Open Ditches - 2018
o CAMA Major Development Permit (Permit #87-18)
o USACE GP 291 (AID# SAW-2016-00075)
o NCDWR 401 WQC (Project #2018-0760)
MAR 0 4 2021
DCM WILMINGTON, NC
Page 3 of 7

Wilmington International Airport
FEMA Ditch/Runoff Drainage Mitigation Project
Ai WithersRavene&
7vrPeople Your Success
The cumulative impacts associated with previous permitted actions at the airport exceed
thresholds for requiring mitigation, and therefore the applicant is proposing to provide mitigation
for the proposed impacts associated with the current project.
Existing Conditions
The project area is located within the active airfield, which is maintained/mowed regularly to
manage vegetation at very low heights as required by the FAA. The project area is located within
to the Runway Safety Area (RSA) of Runway 6.
The project area contains a perennial UT to Smith Creek (Stream 1). The vegetation within the
areas outside of Stream 1 is regularly mowed/maintained. It is unclear is Stream 1 is a channelized
natural stream or was an excavated ditch that naturalized into a stream. The banks of Stream 1
are very steep, and erosion has caused bank failure and downcutting of the stream channel and
resulted in significant sedimentation of the downstream section of Stream 1, and ultimately Smith
Creek.
Areas of Environmental Concern
Stream 1 is an inland tidal UT to Smith Creek, which is classified as C;Sw, and is subject to a 301
CAMA Area of Environmental Concern (AEC). NCDCM has determined that CAMA jurisdiction
stops at the perimeter security fence, as the upstream portions of Stream 1 are not navigable. The
30' AEC extends 30 ft northeast of the perimeter security fence and encompasses approximately
0.08 acres (3,513 sq ft) of the project area. While the proposed project will not result in impervious
area within the 30' AEC, the entire 30' AEC within the project area will be graded and filled.
SITE INFORMATION
Property Size
±1,339 acre
Project Area
1.0 acres
Total Length of Shoreline for Entire Tract
±16,970 If
_
Project Area within 30' AEC
±0.08 acres
Impervious Area within 30' AEC
None
Impervious Area Associated with Project
None
Jurisdictional Features (Streams)
• Stream 1 (Section 404 - Non-CAMA) - 244 If (Impact #1)
• Stream 1 (Section 404/10 - Non-CAMA) - 31 If (Impact #2)
• Stream 1 (Navigable Waters - CAMA) - 41 If (Impact #3)
Upland Development
The proposed upland development consists of the excavation and grading of the uplands
immediately adjacent to Stream 1 to lay back the slopes to a 3:1 slope for installation of the
articulating concrete block system.
Proposed Impacts
The proposed impacts consist of the following permanent impacts to Stream 1:
• Stream 1 (non -tidal) - 244 If (Impact #1)
• Stream 1 (tidal non -navigable) - 31 If (Impact #2) 0 4 2021
• Stream 1 (tidal -navigable) - 41 If (Impact #3) MAR
DCM WILMINGTON, MC
Page 4 of 7

Wilmington International Airport
FEMA Ditch/Runoff Drainage Mitigation Project
■/ WithersRavene&
`r our People Your Success
Stream Impact Table
lm act #
p
Impact Area
Total Impact
Tidal
Non -Tidal
In AEC
Outside of
AEC
In AEC
Outside of
AEC
Impact 1
244 If
244 If
Impact 2
31 If
31 If
Impact 3
41 LF
41 LF
Totals
71
0
0 1
244
316If
Ultimately, all of Stream 1 within the project area will be impacted by the proposed
lining/stabilization to eliminate the erosion issues, security issues and wildlife habitat as required
by the FAA.
The following provides a breakdown of the total disturbance for the project.
Impact Type
Material
Within AEC
Outside of AEC
Fill
(Below NHW)
Articulating Concrete Block
Geogrid
407 sf
Fill
(Above NHW)
Articulating Concrete Block
Geogrid
82 sf
Fill
(Below NHW)
Concrete Beam Below Fence
13 sf
Fill
(Above NHW)
Concrete Beam Below Fence
3 sf
Fill
(Below NHW)
Riprap
448 sf
Fill
(Above NHW)
Riprap
77 sf
Fill
(All Fill Below NHW)
Articulating Concrete Block,
Concrete Beam, Riprap, and
soil (grading)
14 cubic yards
MAR 0 8 2C
Fill
(All Fill Above NHW)
Articulating Concrete Block
and soil (grading)
32 cubic yards
76.8 cubic yards
Excavation
(All Excavation)
N/A
77 cubic yards
255 cubic yards
21
Avoidance and Minimization
The proposed impacts are necessary to correct the erosion within Stream 1 which is causing a
reoccurring security issue by undermining the perimeter security fence and creating openings
through which humans and wildlife can access the airfield. Since the erosion is occurring within a
jurisdictional stream, impacts could not be avoided or minimized. It should be noted that Stream
1 is highly degraded and has low functional value because of the erosion within the channel and
historic maintenance.
Stream 1 is a perennial stream which was historically channelized to convey stormwater drainage
within approximately 37-acres within the airport beyond the perimeter fence and into Smith
Creek. Stream 1 experiences significant erosion of the banks and downcutting of the stream bed
with every rain event, resulting in sedimentation of the downstream section of Stream 1 and
Page 5 of 7

Wilmington International Airport
FEMA Ditch/Runoff Drainage Mitigation Project
WfthersRavenet
eopte Your Suaess.
ultimately Smith Creek. The proposed impacts from lining of Stream 1 will result in overall
improvements to the water quality within downstream portions of Stream 1 and Smith Creek by
eliminating the current erosion and sediment transport into these streams. WithersRavenel
conducted an NCSAM functional assessment of Stream 1, which determined that the functional
value was "Low" (see attached NCSAM Assessment Form).
Grading of the slopes and installation of the articulating concrete block geogrid lining will be
completed "in the dry". This will be accomplished through by blocking the upstream end of the
perimeter road culvert and pumping stormwater drainage flow around the project area and back
into downstream portion of Stream 1. Additionally, the downstream culvert will also be blocked
to block tidal flow from entering the project area from downstream.
Silt fencing will be installed around all disturbed areas in accordance with the Sediment & Erosion
Control Plan, which will be reviewed and approved by NCDMLR. Upon completion of grading, all
areas will be sodded with live grass sod to provide permanent stabilization.
Mitigation
Since the proposed project does not avoid and minimize impacts to jurisdictional waters and
wetlands, compensatory mitigation is proposed.
The NCSAM assessment of Stream 1 determined the functional value to be "Low". The proposed
lining/stabilization of Stream 1 will result in an overall benefit to the water quality of the
downstream portions of Stream 1, and ultimately Smith Creek, by eliminating the introduction of
significant levels of sediment resulting from the eroding stream bed and banks. Considering the
low functional value of Stream 1 and water quality benefits resulting from eliminating the
sedimentation from the eroding banks, a 0.5:1 mitigation ratio is proposed for the proposed stream
impacts as noted in the table below.
Impact #
Feature
Proposed
Impact
Proposed
Mitigation
Ratio
Proposed Mitigation
Impact 1
Non -Tidal Stream
244 If
0.5:1
122 LF -Freshwater Non Tidal
Stream Credits
Impacts 2&3
inland Tidal
Stream
72 If
0.5:1
36 If - Freshwater Tidal Stream
Credits
The proposed 0.5:1 ratio results in the provision of 122 If of freshwater non -tidal stream credits
and 36 If of freshwater tidal stream credits. The applicant proposes to purchase the proposed
stream mitigation credits from the North East Cape Fear Umbrella Mitigation Bank (NECFUMB).
A copy of the Letter of Availability from the NECFUMB has been provided as an attachment.
Compliance with Federal Changes to the 401 Rules
• The project proponent hereby certifies that all information contained herein is true, accurate, and
complete to the best of my knowledge and belief
• The project proponent hereby requests that the certifying authority review and take action on this
CWA 401 certification request within the applicable reasonable period of time.
MAR 0 4 2021
DCM WILMINGTON, MC
Page 6 of 7

Wilmington International Airport
FEMA Ditch/Runoff Drainage Mitigation Project
WithersRavenel
Our People YourSucces>
Please feel free to contact me if you have questions or require additional information to complete
your review.
Sincerely,
Troy Beasley
Senior Environmental Scientist
Attachments:
• CAMA Major Permit Application Forms
o MP-1 - Applicant Info
o MP-2 - Excavation and Fill
• NCDWR Pre -Filing Meeting Request Submittal Confirmation
• 404/401 PCN Form
• Agent Authorization
• Adjacent Property Owner Exhibit & Adjacent Property Owner Notification Certified Mail
Return Receipts
• Property Deed
• Aerial Photo
• Delineation Exhibit
• USGS Quads
• New Hanover County Soil Survey
• NCDMF Descriptive Boundaries for Coastal -Joint -inland Waters Map
• Preliminary JD Exhibit & Upland Data Form
• NCSAM Assessment of Stream 1
• FEMA Record of Environmental Consideration (REC) for CATEX
• Photo Documentation
• NECFUMB Letter of Availability
• CAMA Plans/Impact Exhibits
MAR 0 4 2021
DCM VWILMiwoTON, NC
Page 7 of 7

DCM MP-1
APPLICATION for
Major Development Permit
(last revised 12127106)
North Carolina DIVISION OF COASTAL MANAGEMENT
1. Primary Applicant/ Landowner Information
Business Name
New Hanover County Airport Authority
Applicant 1: First Name
A.
Applicant 2: First Name
MI
Granseur
MI
Project Name (if applicable)
ILM - FEMA Ditch/Runoff Drainage Mitigation Project
Last Name
Dick
Last Name
if additional applicants, please attach an additional page(s) with names listed.
Mailing Address
1740 Airport Blvd, Suite 112
ZIP
28405
Country
USA
Street Address (if different from above)
Email
PO Box
Phone No.
910 - 341 - 4333 ext.
City
City
Wilmington
State
FAX No.
State
NC
ZIP
2. Agent/Contractor Information
Business Name
Withersravenel, Inc
Agent/ Contractor 1: First Name
Troy
Agent/ Contractor 2: First Name
Mailing Address
219 Station Road, Suite 101
ZIP
28405
MI
H
MI
Last Name
Beasley
Last Name
PO Box
Phone No. 1
910 - 509 - 6512 ext.
City
Wilmington
Phone No. 2
910-622-0122 ext.
State
NC
FAX No.
Street Address (if different from above)
Email
Contractor #
City
<Form continues on back>
State
ZIP
RECEIVED
MAR 0 4 2021
Ell[ WJLM1NCTON, NC
252-808-2808 n; 1-888-4RCOAST :; www.nccoastalmanagement.net

Form DCM MP-1 (Page 2 of 6)
APPLICATION for
Major Development Permit
3. Project Location
County (can be multiple)
New Hanover
Street Address
1740 Airport Blvd
State Rd. #
Subdivision Name
City
Wilmington
State
NC
Zip
28405 -
Phone No.
910 - 341 - 4333 ext.
Lot No.(s) (if many, attach additional page with list)
a. In which NC river basin is the project located?
Cape Fear (HUC: 03030007)
b. Name of body of water nearest to proposed project
UT to Smith Creek
c. is the water body identified in (b) above,
natural or manmade?
d. Name the closest major water body to the proposed project site.
Smith Creek (Stream Index: 18-74-63)
['Natural Manmade ❑Unknown
e. Is proposed work within city limits or
planning jurisdiction?
f. If applicable, list the planning jurisdiction or city limit the proposed
work falls within.
New Hanover County
— Yes • No
4. Site Description
a. Total length of shoreline on the tract (ft.)
16,970 If
b. Size of entire tract (sq.ft.)
Entire Parcel - 58,370,400 sf (1,340 acres)
c. Size of individual lot(s)
NIA
(If many lot sizes, please attach additional page with a list)
d. Approximate elevation of tract above NHW (normal high water) or
NWL (normal water level)
12' ®NHW or ❑NWL
e. Vegetation on tract
The project is located within the maintained airfield at the Wilmington International Airport, and the vegetation consists of
mowed grasses and weeds.
f. Man-made features and uses now on tract
The project is located within the Wilmington International Airport, and the man-made features on the tract include two runways,
numerous taxiways, an airport terminal building, parking lots, accessory buildings and other infrastructure associated with
operation of an airport.
The specific project location (Impacts 1, 2 & 3) is located southwest of Runway 6, and immediately downstream of the
perimeter road and existing stormwater drainage swale associated with the onsite stormwater management system.
g. Identify and describe the existing land uses adiacent to the proposed
project site.
of undeveloped land, residential land use and commercial
The land uses adjacent to the project site consists of a mixtured
land use.
h. How does local government zone the tract?
A -I - Airport Industrial District
i.
Is the proposed project consistent with the applicable zoning?
(Attach zoning compliance certificate, if applicable)
®Yes ❑No ■NA
j. Is the proposed activity part of an urban waterfront redevelopment proposal? DYes No
k. Has a professional archaeological assessment been done for the tract?
If yes, by whom?
If yes, attach a copy. •Yes D7 No DNA
I. Is the proposed project located in a National Registered Historic District
National Register listed or eligible property?
or does it involve a ❑Yes No • NA
MAR 0 4 2021
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Form DCM MP-1 (Page 3 of 6)
APPLICATION for
Major Development Permit
m. (i) Are there wetlands on the site? ®Yes ENo
(ii) Are there coastal wetlands on the site? [Yes ®No
(iii) If yes to either (i) or (ii) above, has a delineation been conducted? ❑Yes EN
(Attach documentation, if available)
n. Describe existing wastewater treatment facilities.
The Wilmington International Airport is serviced by the CFPUA sewer system and WVVTP. The proposed project consists of
fixing erosion issues by lining Stream 1 and will not generate wastewater.
o. Describe existing drinking water supply source.
CFPUA water system
p. Describe existing storm water management or treatment systems.
The onsite stormwater management system consists of numerous vegetated conveyances which receive discharge for the
large storwmater collection network.
5. Activities and Impacts
a. Will the project be for commercial, public, or private use?
®Commercial ®Public/Government
❑Private/Community
RECEIVED
MAR 0 4 2021
..+C WI Mil:GTON, NO
252-808-2808 1-888-4RCOAST www.nccoastaimanagement.net

Form DCM MP-1 (Page 4 of 6) APPLICATION for
Major Development Permit
b. Give a brief description of purpose, use, and daily operations of the project when complete.
The purpose of the proposed project is to meet FAA requirements by mitigating public safety hazards associated with aircraft
travel by preventing human and wildlife access within the airfield at the project location to improve aircraft safety. The
proposed project will address excessive erosion within the stream feature (Stream 1) resulting from extraordinary rainfall and
flooding from Hurricane Florence which destabilized the channel. Stream 1 is the outlet for the stormwater drainage system
for approximately 37-acres within the airport. The erosion within the channel continues to get worse with each heavy rainfall
event and has eroded out a large area underneath the perimeter security fence. The erosion continues to widen the channel
at the perimeter security fence, resulting in the airport maintenance regularly having to block the new holes under the fence
with metal rods. The metal rods then catch debris, which causes the stream to erode around the metal posts, creating a
constant maintenance issue. The frequent undermining of the perimeter security fence poses a significant security risk, as
the erosion creates access points into the airfield for both humans and wildlife at the Runway 6 approach. The erosion and
sedimentation have also created conditions within the channel that is attracting wildlife. These conditions create a safety
issue as Stream 1 is within the Runway 6 Approach and approximately 800 If from the end of Runway 6, greatly increasing
the likelihood of a wildlife strike with an aircraft. In 2018, a small passenger aircraft struck a coyote on the runway, and the
proposed project is critical to improving aircraft and public safety.
Additionally, the head cut from the erosion has progressed approximately 300 If upstream from the perimeter security fence to
the perimeter road culvert in approximately 18-months. If not addressed, the erosion will undercut the perimeter road culvert
and continue upstream, threatening the integrity of Runway 6. Since the initial damage to the stream channel and ensuing
erosion resulted from flooding from Hurricane Florence, the proposed project is being funded by FEMA. FEMA prepared a
Record of Environmental Consideration (REC) in accordance with NEPA, which determined that the proposed project met
conditions for authorization under a CATEX category *N9 — Federal Assistance for Flood Hazard Reduction Actions. The
FEMA REC has been provided as an attachment.
The proposed project proposes to permanently impact Stream 1, of which approximate 72 If is tidal and 244 If is non -tidal. The
project proposes to grade the slopes of the channel and surrounding areas to a 3:1 slope and line the entire channel with an
articulating concrete block geogrid system and riprap which will permanently stabilize the channel and prevent future erosion
and undermining of the perimeter security fence, permanently eliminating the reoccurring safety issue at this location. The
articulating concrete block liner is pervious, allowing water to infiltrate through it, as well as vegetation to grow up through it
and has been used to successfully stabilize other onsite stormwater swales at ILM (see Photo Documentation).
The stream channel will be lined from the existing perimeter road culvert to an existing culvert approximately 30 ft southwest of
the existing security fence. This culvert is located within the CFPUA sewer maintenance access road. The articulating block
will be installed within the stream from the perimeter road culvert to the security fence, with the section of stream from the
security fence to the downstream culvert lined with riprap to dissipate flow, stabilize the channel, and protect the culvert from
erosion and undercutting. A concrete headwall will be constructed on the upstream end of the existing culvert to provide
permanent stabilization and protection of the culvert. Additionally, a concrete headwall will be constructed on the
downstream end of the perimeter road culvert.
The perimeter security fence will be temporarily relocated over the existing culvert to the southwest during construction but will
be reconstructed in its current location once construction is complete. Metal bars will be installed extending from the bottom
of the fence through the channel to provide prevent access under the fence by wildlife or humans. The metal bars will be
installed approximately 4" apart and will be anchored in a 12" long x 12" wide x 12" high concrete beam that will be installed
below ground directly below the fence (see Figure 3 in Impact Maps).
A portion of Stream 1 inside of the perimeter security fence is an inland -tidal stream. However, per previous NCDCM
determinations on similar projects at the Wilmington International Airport, CAMA jurisdiction stops at the existing security
fence as the portions upstream of the perimeter security fence are not navigable. Therefore, the tidal portions of Stream 1
upstream of the security fence are considered Section 404/10 waters but are not subject to CAMA jurisdiction. The portion of
Stream 1 downstream of the security fence is considered navigable waters subject to CAMA jurisdiction.
The completion of the project will increase aircraft and public safety as part of the normal daily operation and activities
associated with the operation of the airport. Please note that the proposed project will not create any additional impervious
area and will not change the existing volume of stormwater drainage discharging into downstream portions of Stream 1.
c. Describe the proposed construction methodology, types of construction equipment to be used during construction, the number of each type
of equipment and where it is to be stored.
Standard commercial construction equipment of various sizes and number will be used to construct the proposed project
(see Project Narrative for more information). All equipment will be stored outside of the AEC in uplands adjacent to the
project.
d. List all development activities you propose.
Grading of stream banks and adjacent areas to create a 3:1 slope, installing an articulating concrete block geogrid and riprap
within Stream 1 to permanently stabilize the channel and permanently eliminate erosion, construction of a headwall on the
upstream end of the CFPUA sewer maintenance road culvert and construction of a headwall on the downstream end of the
perimeter road culvert.
e. Are the proposed activities maintenance of an existing project, new work, or both? new work
rFNK a'f CULi
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Form DCM MP-1 (Page 5 of 6)
APPLICATION for
Major Development Permit
f. What is the approximate total disturbed land area resulting from the proposed project? 1.0 ❑Sq.Ft or Acres
g. Will the proposed project encroach on any public easement, public accessway or other area • Yes No ■ NA
that the public has established use of?
h. Describe location and type of existing and proposed discharges to waters of the state.
The proposed discharges to Waters of the State consists of an existing and ongoing stormwater discharge. The project is
located southwest of Runway 6 with the Runway Safety Area (RSA) and begins at the existing perimeter road culvert and
extends to another existing culvert downstream. The project will provide permanent stabilization to the conveyance and will
continue to discharge stormwater into the section of Stream 1 downstream of the project area.
i. Will wastewater or stormwater be discharged into a wetland? I: Yes ❑No ❑NA
If yes, will this discharged water be of the same salinity as the receiving water? •Yes ❑No ®NA
j. Is there any mitigation proposed? ®Yes No ❑NA
If yes, attach a mitigation proposal.
Form continues on back>
6. Additional Information
In addition to this completed application form, (MP-1) the following items below, if applicable, must be submitted in order for the application
package to be complete. Items (a) — (f0 are always applicable to any major development application. Please consult the application
instruction booklet on how to properly prepare the required items below.
a. A project narrative.
b. An accurate, dated work plat (including plan view and cross -sectional drawings) drawn to scale. Please give the present status of the
proposed project. Is any portion already complete? If previously authorized work, clearly indicate on maps, plats, drawings to distinguish
between work completed and proposed.
c. A site or location map that is sufficiently detailed to guide agency personnel unfamiliar with the area to the site.
d. A copy of the deed (with state application only) or other instrument under which the applicant claims title to the affected properties.
e. The appropriate application fee. Check or money order made payable to DENR.
f. A
list of the names and complete addresses of the adjacent waterfront (riparian) landowners and signed return receipts as proof that such
owners have received a copy of the application and plats by certified mail. Such landowners must be advised that they have 30 days in
which to submit comments on the proposed project to the Division of Coastal Management.
Name New Hanover County Property Mangement - Jerome Fennel - Director Phone No. 910-798-4330
Address 200 Division Drive, Wilmington, NC 28401
Name NCDOT - Chad Kirnes - Division Engineer Phone No. 910-341-2000
Address 5501 Barbados Blvd, Castle Hayne, NC 28429
Name Cape Fear Public Utility Authority - Jim Flechtner - Executive Director Phone No. 910-332-6621
Address 235 Government Center Drive; Wilmington, NC 28403
g.
A list of previous state or federal permits issued for work on the project tract. Include permit numbers, permittee, and issuing dates.
Numerous state and federal permits have been issued for the
project tract. However, there have been no permits issued
for the specific project area (see Project Narrative for more
information).
h. Signed consultant or agent authorization form, if applicable. �}(]2 I
i. Wetland delineation, if necessary. �A"
j. A signed AEC hazard notice for projects in oceanfront and inlet areas. (Must be signed by property owner)
k. A statement of compliance with the N.C. Environmental Policy Act (N.C.G.S. 113A 1-10), if necessary. If the project involves expenditure
of public funds or use of public lands, attach a statement documenting compliance with the North Carolina Environmental Policy Act.
7. Certification and Permission to Enter on Land
252-808-2808 .. 1-888-4RCOAST ., www.nccoastalmanagement.net

Form DCM MP-1 (Page 6 of 6) APPLICATION for
Major Development Permit
I understand that any permit issued in response to this application will allow only the development described in the application.
The project will be subject to the conditions and restrictions contained in the permit.
I certify that I am authorized to grant, and do in fact grant permission to representatives of state and federal review agencies to
enter on the aforementioned lands in connection with evaluating information related to this permit application and follow-up
monitoring of the project.
I further certify that the information provided in this application is truthful to the best of my knowledge.
Date _03/0412021 Print Name Troy Beasley - Authorized Agent
Signature
Please indicate application attachments pertaining to your proposed project.
®DCM MP-2 Excavation and Fill Information ❑DCM MP-5 Bridges and Culverts
❑DCM MP-3 Upland Development
❑DCM MP-4 Structures Information
RECEIVED
MAR 0 4 2021
252-808-2808 .. 1-888-4RCOAST ., www.nccoastalmanagement.net

Form DCM MP-2
EXCAVATION and FILL
(Except for bridges and culverts)
Attach this form to Joint Application for CAMA Major Permit, Form DCM MP-1. Be sure to complete all other sections of the Joint
Application that relate to this proposed project. Please include all supplemental information.
Describe below the purpose of proposed excavation and/or fill activities. All values should be given in feet.
Access
Channel
(NLW or
NWL)
Canal
Boat Basin
Boat Ramp
Rock Groin
Rock
Breakwater
Other
(excluding
shoreline
stabilization)
Length
Width
Avg. Existing
Depth
NA
NA
Final Project
Depth
NA
NA
1. EXCAVATION
This section not applicable
a. Amount of material to be excavated from below NHW or NWL in b. Type of material to be excavated.
cubic yards.
c. (i) Does the area to be excavated include coastal wetlands/marsh d. High -ground excavation in cubic yards.
(CW), submerged aquatic vegetation (SAV), shell bottom (SB),
or other wetlands (WL)? If any boxes are checked, provide the
number of square feet affected.
❑ CW ❑SAV ❑SB
O WL ❑None
(ii) Describe the purpose of the excavation in these areas:
2. DISPOSAL OF EXCAVATED MATERIAL This section not applicable
a. Location of disposal area. b. Dimensions of disposal area.
c. CO Do you claim title to disposal area?
['Yes ❑No ❑NA
(ii) If no, attach a letter granting permission from the owner.
e. (i) Does the disposal area include any coastal wetlands/marsh
(CW), submerged aquatic vegetation (SAV), shell bottom (SB),
or other wetlands (WL)? If any boxes are checked, provide the
number of square feet affected.
❑CW ❑SAV ❑SB
O WL ❑None
(ii) Describe the purpose of disposal in these areas:
d. CO Will a disposal area be available for future maintenance?
❑Yes ❑No ❑NA
(ii) If yes, where?
f. (i) Does the disposal include any area in the water?
❑Yes ❑No DNA
(ii) If yes, how much water area is affected?
MAR 0 4 2021
252-808-2808 :; 1-888-4RCOAST :: www.nccoastalmanag_ement.net revised: 12/26/06

Form DCM MP-2 (Excavation and Fill, Page 2 of 3)
3. SHORELINE STABILIZATION
(If development is a wood groin, use MP-4 - Structures)
❑ This section not applicable
a. Type of shoreline stabilization: b.
❑Bulkhead ERiprap ❑Breakwater/Sill ®Other:
Articulating Concrete Block Geoorid System
c. Average distance waterward of NHW or NWL: N/A - stabilization d.
will occur within a small (6' wide) tidal tributary (Stream 1) to Smith
Creek. The entire tributary will be lined/stabilized with articulation
concrete block geogrid sytem and riprap.
e. Type of stabilization material:
An articulation concrete block geogrid sytem will be used to line the
section of Stream 1 upstream of the perimeter security fence and
riprap will be used to stabilize the stream channel from the security
fence to the existind CFPUA maintenance road culvert located
approximately 25 If downstream of the fence.
g•
Number of square feet of fill to be placed below water level.
Bulkhead backfill Riprap 448 sf - below water level
Breakwater/Sill Other Articulating Concrete Block
407 sf below water level (within AEC)
i. Source of fill material.
Articulating Concrete Geogrid -Manufacturer
Riprap - construction materials supplier (to be determined by
contractor)
f.
Length: 60 If (within AEC)
Width: 60 If (within AEC)
Maximum distance waterward of NHW or NWL: NIA - stabilization
will occur within a small (6' wide) tidal tributary (Stream 1) to Smith
Creek. The entire tributary will be fined/stabilized with articulation
concrete block geogrid sytem and riprap.
(i) Has there been shoreline erosion during preceding 12
months?
®Yes ❑No DNA
(ii) If yes, state amount of erosion and source of erosion amount
information.
The downcutting and erosion of Stream 1 resulted from
destabilization of the channel from flooding during Hurricane
Florence. The erosion/head cutting has progessed
approximately 300 If upstream in the last 18 months.
h. Type of fill material.
Articulating concrete block and riprap.
4. OTHER FILL ACTIVITIES
(Excluding Shoreline Stabilization}
®This section not applicable
a. (i) Will fill material be brought to the site? ❑Yes ❑No DNA
If yes,
(ii) Amount of material to be placed in the water
(iii) Dimensions of fill area
(iv) Purpose of fill
b.
(i) Will fill material be placed in coastal wetlands/marsh (CV ,
submerged aquatic vegetation (SAV), shell bottom (SB), or
other wetlands (WL)? If any boxes are checked, provide the
number of square feet affected.
❑CW ❑SAV ❑SB
OWL ❑None
(ii) Describe the purpose of the fill in these areas:
5. GENERAL
a. How will excavated or fill material be kept on site and erosion
corstrolled?
Excavated material is intended to be loaded directly into dump
trucks and hauled offsite. In the event that temporary
stockpiling is necessary, a 30'x30' stockpile area has been
designated within the staging area as shown on the attached
plans .
c. (i) Will navigational aids be required as a result of the project?
['Yes ❑No ONA
(ii) If yes, explain what type and how they will be implemented.
b.
d.
What type of construction equipment will be used (e.g., dragline,
backhoe, or hydraulic dredge)?
Typical construction equipment, including excavator, dump trucks,
bull dozer will be used to construct the project.
(i) Will wetlands be crossed in transporting equipment to project
site? ❑Yes No DNA
(ii) if yes, explain steps that will be taken to avoid or minimize
environmental impacts.
MAR 0 4 2021
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Form IDCM IVIP-2 (Excavation and Fiat, Page 3 of 3)
03/04/2021
Date
iLM - FEMA Ditch/Drainage Runoff Mitigation
Project Name
New Hanover County Airport Authority
Applicant Name
- Authorized Agent
Applicant Signature
MAR fl 4 2021
282-808-2808 :: T-888-4RCOAST :: www.nccoastalmanagement.net
revised: 12!26/06

W/ WithersRavenel.
NCDWR PRE -FILING MEETING
REQUEST SUBMITTAL CONFIRMATION
MAR 0 4 2021

Beasley, Troy
From:
Sent:
To:
Subject:
Attachments:
[e-mail]
Tuesday, December 29, 2020 3:25 PM
Beasley, Troy
Pre -Filing Meeting Request Submittal for ILM Ditch/Drainage Runoff Mitigation
DWR Pre -Filing Meeting Request Form.pdf
The North Carolina Division of Water Resources has received the Pre -Filing Meeting Request
Form for ILM Ditch/Drainage Runoff Mitigation that you submitted on 12/2912020. Attached is
a copy of your initial request.
This email was automatically generated by Laserfiche workflow. Please do not respond to this
email address, as responses aren't monitored.
MAR 0 4 2021
1

DWR Pre -Filing Meeting Request Form
Contact Name *
Contact Email Address*
Project Owner*
Project Name*
Project County
*
Owner Address:*
Troy Beasley
[e-mail]
New Hanover County Airport Authority
ILM Ditch/Drainage Runoff Mitigation
New Hanover
Street Address
1470 Airport Blvd
Address Line 2
Suite 112
Qty State/ R-ovince / Region
Wilmington North Carolina
Fbstal ! Z'ip Otde Country
28405 USA
Is this a transportation project? * c: Yes r No
Type(s) of approval sought from the DWR:
W 401 Water Quality Certification - r 401 Water Quality Certification -
Regular Express
r Individual Perrnit r Modification
I— Shoreline Stabilization
Does this project have an existing project ID#? *
r Yes C17 No
Do you know the name of the staff member you would like to request a meeting with?
Please give a brief project description below.*
The purpose of the proposed project is to meet FAA requirements by
mitigating public safety hazards associated with aircraft travel by
preventing human and wildlife access within the airfield at the project
location to improve aircraft safety. The proposed project will address
excessive erosion within the stream feature (Stream 1) resulting from
extraordinary rainfall and flooding from Hurricane Florence which
destabilized the channel. Stream 1 is the outlet for the stormwater
drainage system for approximately 37-acres within the airport. The
erosion within the channel continues to get worse with each heavy
rainfall event and has eroded out a large area underneath the
perimeter security fence. The erosion continues to widen the channel
at the perimeter security fence, resulting in the airport maintenance
regularly having to block the new holes under the fence with metal
rods. The metal rods then catch debris, which causes the stream to
erode around the metal posts, creating a constant maintenance
MAR 0 4 ZOZ1

issue. The frequent undermining of the perimeter security fence
poses a significant security risk, as the erosion creates access points
into the airfield for both humans and wildlife at the Runway 6
approach. The erosion and sedimentation have also created
conditions within the channel that is attracting wildlife, These
conditions create a safety issue as Stream 1 is within the Runway 6
Approach and approximately 800 If from the end of Runway 6, greatly
increasing the likelihood of a wildlife strike with an aircraft.
Additionally, the head cut from the erosion has progressed
approximately 300 If upstream from the perimeter security fence to
the perimeter road culvert in approximately 18-months_ if not
addressed, the erosion will undercut the perimeter road culvert and
continue upstream, threatening the integrity of Runway 6. Since the
initial damage to the stream channel and ensuing erosion resulted
from flooding from Hurricane Florence, the proposed project is being
funded by FEMA. FEMA prepared a Record of Environmental
Consideration (REC) in accordance with NEPA, which determined that
the proposed project met conditions for authorization under a CATEX
category *N9 — Federal Assistance for Flood Hazard Reduction
Actions. The FEMA REC has been provided as an attachment.
The proposed project proposes to permanently impact Stream 1, of
which approximate 72 If is tidal and 244 If is non -tidal. The project
proposes to grade the slopes of the channel to a 3:1 slope and line
the entire channel with an articulating concrete block geogrid system
which will permanently stabilize the channel and prevent future
erosion and undermining of the perimeter security fence,
permanently eliminating the reoccurring safety issue at this location_
The articulating concrete block liner is pervious, allowing water to
infiltrate through it, as well as vegetation to growthrough it. The
stream channel wilt be Tined from the existing culvert in the perimeter
road to an existing culvert approximately 25 If downstream of the
existing security fence. The articulating concrete block system has
been used to stabilize other onsite stormwater swales at ILM and it
has been very affective (see Photo Documentation). The perimeter
security fence will be relocated over the existing culvert to the west to
avoid potential future issues with erosion compromising the perimeter
security fence. A concrete headwall will be constructed on the
upstream end of the existing culvert to provide permanent
stabilization of the culvert and prevent future erosion.
The completion of the project will increase aircraft and public safety
as part of the normal daily operation and activities associated with the
operation of the airport. Please note that the proposed project will not
create any additional impervious area and will not change the existing
volume of stormwater drainage discharging into downstream portions
of Stream 1.
The project will require a CAMA major development permit as well as
a 401 WQC.
Please give a couple of dates you are available for a meeting.
1111 /2021
1/12/2021
1/13/2021
MAR 0 4 2021

1/14/2021
1/15/2021
Please attach the documentation you would like to have the meeting about.
CAMA Exhibits.pdf
orlY
3.33MB
By digitally signing below, l certify that I have read and understood that per the Federal Clean Water Act Section
401 Certification Rule the following statements:
▪ This form completes the requirement of the Pre -Filing Meeting Request in the Clean Water Act Section 401 Certification
Rule.
▪ I understand by signing this form that I cannot submit my application until 30 calendar days after this pre -fling
meeting request.
• I also understand that DWR is not required to respond or grant the meeting request.
Your project's thirty -day clock started upon receipt of this application. You will receive notification regarding meeting location
and time if a meeting is necessary. You will receive notification when the thirty -day clock has expired, and you can submit an
application.
Signature
*
Submittal Date 12/29/2020
MAR 0 4 2021

ROY COOPER
Governor
DIONNE DELLI-GATT(
secretary
BRAXTON DAVIS
Director
Troy Beasley
WithersRavenel
219 Station Road
Wilmington, NC 28405
Dear Mr. Beasley
NORTH CAROLINA
Environmental Quality
March 16, 2021
The Division of Coastal Management hereby acknowledges receipt of your application, as acting agent for the New Hanover County
Airport Authority, for State approval for development of the subject property located at 1740 Airport Boulevard, adjacent to an unnamed
tributary of Smith Creek in New Hanover County. It was received as complete on March 8, 2021 and appears to be adequate for
processing at this time. The projected deadline for making a decision is May 22, 2021. 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 March 8, 2021, 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 property owner, developer, 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 this
notice at a conspicuous point along your property where it can be observed from a public road. Some examples would be: Nailing the
notice card to a telephone pole or tree along the road right-of-way fronting your property; or at a point along the road right-of-way where
a private road would lead one into your property. 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.
Katharine Elks
Field Representative
cc: Curt Weychert, DCM Robb Mairs, DWR
USAGE
New Hanover Co. Airport Authority, Applicant Christine Bouffard, LPO
North Carolina Department of Environmental Quality 1 Division of Coastal Management
Wilmington Office 1127 Cardinal Drive Extension I Wilmington, North Carolina 28405
910.7 6.7215

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NORTH CAROLINA
Environmental °wilily
March 17, 2021
[e-mail]
2 Pages
Star News
Legal Advertisement Section
Post Office Box 840
Wilmington, North Carolina 28402
Re: Major Public Notice for:
ROY COOPER
Governor
MICHAEL S. REGAN
Secretan
BRAXTON DAVIS
Director, Division of Coastal Management
• Harvey Allison & Wright Investments, LLC / New Hanover County
• New Hanover Airport Authority / New Hanover County
Hello Angie: Please publish the attached Notice in the Sunday, March 21, 2021 issue.
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 to the attention of Jarimy
Springer, (Customer No. 70100342).
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 me at our Wilmington
office.
incerely,
Tanya Pietila
Permittmg Support & Customer Assistance
cc: MHC Files
Curt Weychert — MHC
USACE
State of North Carolina 1 Environmental Quality 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 March 15, 2021, Harvey Allison & Wright Investments, LLC
proposed to install a new vinyl bulkhead to replace an existing deteriorating bulkhead at 207 A & B Florida
Ave., adjacent to the Carolina Beach Yacht Basin in Carolina Beach, New Hanover County; and on March
16, 2021, the New Hanover County Airport Authority proposed to perform FEMA ditch and runoff drainage
mitigation at 1740 Airport Blvd, adjacent to an unnamed tributary in Wilmington, New Hanover County.
Copies of these applications can be examined or copied at the office of Patrick Amico (Allison, Wright
Investments, LLC) or Katharine Elks (NHCAirportAuthority) N.C. Dept. of Environmental Quality, Division
of Coastal Management, 127 Cardinal Drive Ext., Wilmington, NC 28405, [phone] (Patrick Amico) or
[phone] (Katharine Elks) 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 April 11, 2021 will be considered in making the permit
decision_ Later comments will be accepted and considered up to the time of peluiit 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.

1lig WithersRavenel
404/401 PCN FORM
MAR 0 4 2021

Office Use Only:
Corps action ID no.
DWQ project no.
Form Version 1.3 Dec 10 2008
Pre -Construction Notification (PCN) Form
A. Applicant Information
1. Processing
la. Type(s) of approval sought from the
Corps:
10 Permit
® Section 404 Permit ID Section
1b. Specify Nationwide Permit (NWP) number: or General Permit (GP) number: GP 198000291
lc. Has the NWP or GP number been verified by the Corps?
❑ Yes No
1 d. Type(s) of approval sought from the DWQ (check all that apply):
N 401 Water Quality Certification — Regular ❑ Non-404 Jurisdictional General Permit
❑ 401 Water Quality Certification — Express ❑ Riparian Buffer Authorization
1 e. Is this notification solely for the record
because written approval is not required?
For the record only for DWQ 401
Certification:
❑ Yes ®No
For the record only for Corps Permit:
❑ Yes r No
1f. Is payment into a mitigation bank or in -lieu fee program proposed for mitigation
of impacts? If so, attach the acceptance letter from mitigation bank or in -lieu
fee program.
IN.j Yes • No
1g. Is the project located in any of NC's twenty coastal counties. If yes, answer 1h
below.
® Yes ❑ No
1 h. Is the project located within a NC DCM Area of Environmental Concern (AEC)?
Yes ❑ No
2. Project Information
2a. Name of project:
ILM — Ditch/Runoff Drainage Mitigation Project
2b. County:
New Hanover
2c. Nearest municipality / town:
Wilmington
2d. Subdivision name:
2e. NCDOT only, T.I.P. or state
project no:
3. Owner Information
3a. Name(s) on Recorded Deed:
New Hanover County Airport Authority
3b. Deed Book and Page No.
Book: 817; Page: 441
3c. Responsible Party (for LLC if
applicable):
Granseur Dick — Facilities Director
3d. Street address:
1740 Airport Road; Suite 112
3e. City, state, zip:
Wilmington, NC 28461
3f. Telephone no.:
910-341-4333
3g. Fax no.:
3h. Email address:
cidickalivilm_com
MAR 0 4 2021
Page 1 of 14
PCN Form — Version 1.3 December 10, 2008 Version

4. Applicant Information (if different from owner)
4a. Applicant is:
4b. Name:
4c. Business name
(if applicable):
4d. Street address:
4e. City, state, zip:
4f_ Telephone no:
4g. Fax no.:
4h. Email address:
❑ Agent ❑ Other, specify:
5. AgentlConsultant Information (if applicable)
5a. Name:
5b. Business name
(if applicable):
5c. Street address:
5d. City, state, zip:
5e. Telephone no.:
5f. Fax no.:
5g. Email address:
Troy Beasley
WithersRavenel
219 Station Road, Suite 101
Wrlmington, NC 28405
910-256-9277
[e-mail]
MAR 0 4 2021
Page 2 of 14
PCN Form — Version 1.3 December 10, 2008 Version

B. Project Information and Prior Project History
1. Property Identification
la. Property identification no. (tax PIN or parcel ID):
PARID: R04200-001-025-000
1 b. Site coordinates (in decimal degrees):
Latitude: 34.260964°N Longitude:
(DD.DDDDDD)
- 77.913153°W
(-DD.DDDDDD)
1 c. Property size:
Parcel - ±1,339 acres
Project Area - ±1.0 acres
2. Surface Waters
2a. Name of nearest body of water (stream, river, etc.) to
proposed project:
Smith Creek (Stream Index: 18-74-63)
2b. Water Quality Classification of nearest receiving water:
C;Sw
2c. River basin:
Cape Fear - 03030007
MAR 0 4 2021
Page 3 of 14
PCN Form — Version 1.3 December 10, 2008 Version

3. Project Description
3a. Describe the existing conditions on the site and the general land use in the vicinity of the project at the time of this
application:
The project area consists of open water streams within the mowed/maintained portions of the airfield. The general land
use in the vicinity consists of a mixture of commercial and residential land uses.
3b. List the total estimated acreage of all existing wetlands on the property:
N/A — there are no wetlands within the project area.
3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property.
316 If within project area
3d. Explain the purpose of the proposed project:
The purpose of the proposed project is to meet FAA requirements by mitigating public safety hazards associated with
aircraft travel by preventing human and wildlife access within the airfield at the project location to improve aircraft safety.
MAR 0 4 2021
Page 4 of 14
PCN Form — Version 1.3 December 10, 2008 Version

3e. Describe the overall project in detail, including the type of equipment to be used:
The proposed project will address excessive erosion within the stream feature (Stream 1) resulting from extraordinary
rainfall and flooding from Hurricane Florence which destabilized the channel. Stream 1 is the outlet for the stormwater
drainage system for approximately 37-acres within the airport. The erosion within the channel continues to get worse with
each heavy rainfall event and has eroded cut a large area underneath the perimeter security fence. The erosion
continues to widen the channel at the perimeter security fence, resulting in the airport maintenance regularly having to
block the new holes under the fence with metal rods. The metal rods then catch debris, which causes the stream to
erode around the metal posts, creating a constant maintenance issue. The frequent undermining of the perimeter
security fence poses a significant security risk, as the erosion creates access points into the airfield for both humans and
wildlife at the Runway 6 approach. The erosion and sedimentation have also created conditions within the channel that
is attracting wildlife. These conditions create a safety issue as Stream 1 is within the Runway 6 Approach and
approximately 800 If from the end of Runway 6, greatly increasing the likelihood of a wildlife strike with an aircraft. In
2018, a small passenger aircraft struck a coyote on the runway, and the proposed project is critical to improving aircraft
and public safety.
Additionally, the head cut from the erosion has progressed approximately 300 If upstream from the perimeter security
fence to the perimeter road culvert in approximately 18-months. If not addressed, the erosion will undercut the perimeter
road culvert and continue upstream, threatening the integrity of Runway 6. Since the initial damage to the stream
channel and ensuing erosion resulted from flooding from Hurricane Florence, the proposed project is being funded by
FEMA. FEMA prepared a Record of Environmental Consideration (REC) in accordance with NEPA, which determined
that the proposed project met conditions for authorization under a CATEX category *N9 — Federal Assistance for Flood
Hazard Reduction Actions. The FEMA REC has been provided as an attachment.
The proposed project proposes to permanently impact Stream 1, of which approximate 72 If is tidal and 244 If is non -tidal.
The project proposes to grade the slopes of the channel and surrounding areas to a 3:1 slope and line the entire channel
with an articulating concrete block geogrid system and riprap which will permanently stabilize the channel and prevent
future erosion and undermining of the perimeter security fence, permanently eliminating the reoccurring safety issue at
this location. The articulating concrete block liner is pervious, allowing water to infiltrate through it, as well as vegetation
to grow up through it and has been used to successfully stabilize other onsite stormwater swales at ILM (see Photo
Documentation).
The stream channel will be lined from the existing perimeter road culvert to an existing culvert approximately 25 If
downstream of the existing security fence. This culvert is located within the CFPUA sewer maintenance access road.
The articulating block will be installed within the stream to the security fence, with the section of stream from the security
fence to the downstream culvert lined with riprap to dissipate flow, stabilize the channel, and protect the culvert from
erosion and undercutting. A concrete headwall will be constructed on the upstream end of the existing culvert to provide
permanent stabilization and protection of the culvert.
The perimeter security fence will be temporarily relocated over the existing culvert to the west during construction but will
be reconstructed in its current location once construction is complete. Metal bars will be installed extending from the
bottom of the fence through the channel to provide prevent access under the fence by wildlife or humans. The metal bars
will be installed approximately 4" apart and will be anchored in a concrete beam will be installed below ground directly
below the fence (see Figure 3 in Impact Maps).
A portion of Stream 1 inside of the perimeter security fence is an inland -tidal stream. However, per previous NCDCM
determinations on similar projects at the Wilmington International Airport, CAMA jurisdiction stops at the existing security
fence as the portions upstream of the perimeter security fence are not navigable. Therefore, the tidal portions of Stream
1 upstream of the security fence are considered Section 404/10 waters but are not subject to CAMA jurisdiction. The
portion of Stream 1 downstream of the security fence is considered navigable waters subject to CAMA jurisdiction.
The completion of the project will increase aircraft and public safety as part of the normal daily operation and activities
associated with the operation of the airport. Please note that the proposed project will not create any additional
impervious area and will not change the existing volume of stormwater drainage discharging into downstream portions of
Stream 1.
MAR 0 4 2021
Page 5 of 14
PCN Form — Version 1.3 December 10, 2008 Version

4. Jurisdictional Determinations
4a. Have jurisdictional wetland or stream determinations by the
Corps or State been requested or obtained for this property /
project (including all prior phases) in the past?
Comments:
■Yes ❑ No Unknown
4b. If the Corps made the jurisdictional determination. what type
of determination was made?
❑Preliminary Final❑
4c. If yes, who delineated the jurisdictional areas?
Name (if known): Troy Beasley
Agency/Consultant Company: WithersRavenel
Other:
4d. If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation.
WithersRavenel completed a delineation of the project area in June 2020. There are no wetlands within the project area.
The only jurisdictional feature present is Stream 1, of which 72 If is tidal and 244 If is non -tidal. A Preliminary JD Exhibit
and upland data form have been provided in support of the delineation. Please note that we are not requesting issuance
of a JD in conjunction with issuance of the 404 permit from the USACE.
An onsite pre -application meeting was conducted with Patrick Amico with the NC Division of Coastal Management
(NCDCM) and Robb Mairs with the NC Division of Water Resources (NCDWR) was conducted on 6/23/2020 to review
Stream 1 and determine the limits of tidal influence and discuss the proposed project. The limits of tidal influence are
depicted in the attached CAMA plans and exhibits.
An additional onsite pre -application meeting was conducted with Katharine Elks (NCDCM) and Joanne Steenhuis
(NCDWR) on 1/11/2021 to review and discuss the project.
In addition to the two onsite pre -application meetings with NCDWR, WithersRavenel submitted a the NCDWR Pre -Filing
Meeting Request on 12/29/2020. A copy of the submittal confirmation has been provided as an attachment to this
application. Therefore, the requirement for requesting a pre -filing meeting under 40 CFR Part 121 for 401 Certifications in
accordance with the federal Clean Water Act have been satisfied.
5. Project History
5a. Have permits or certifications been requested or obtained for
this project (including all prior phases) in the past?
, Yes ❑ No ❑Unknown
5b. [f yes, explain in detail according to 'help file' instructions.
The Wilmington International Airport has received authorizations for three previous Wildlife Hazard Mitigation projects that
involved removal of wildlife habitat as required by the FAA. The projects were:
• [LM Runway 24 Wildlife Hazard & NAVAID Critical Area Mitigation -- 2014
o USACE 404 Individual Permit (AID# SAW 2011-00455)
o NCDWR Individual 401 WQC (Project #13-1263)
• ILM Wildlife Hazard Mitigation Project — 2017
o USACE NWP 39 (AID# SAW 2016-00075)
o NCDWR 401 WQC (Project #2017-0798)
• 1LM Wildlife Hazard Mitigation Project for Wet Detention Basins and Open Ditches - 2018
o CAMA Major Development Permit (Permit #87-18)
o USACE GP 291 (AID# SAW-2016-00075)
o NCDWR 401 WQC (Project #2018-0760)
6. Future Project Plans
6a. Is this a phased project?
❑ Yes ■ No
6b. If yes, explain.
Page 6 of 14
PCN Form — Version 1.3 December 10, 2008 Version

C. Proposed Impacts Inventory
1. Impacts Summary
1 a. Which sections
❑ Wetlands
❑ Open Waters
were completed below
❑ Streams - tributaries
for your project (check all that apply):
❑ Buffers
Construction
• Pond
2. Wetland Impacts
If there are wetland impacts proposed on the site, then complete this question for each wetland area impacted.
2a.
Wetland impact
number —
Permanent (P) or
Temporary (T)
2b.
Type of impact
2c.
Type of wetland
(if known)
2d.
Forested
2e.
Type of jurisdiction
(Corps - 404, 10
DWQ — non-404, other)
2f.
Area of impact
(acres)
W1 ❑ P ❑ T
• Yes
• Corps
❑ No
■ DWQ
2g. TotaI wetland impacts
2h. Comments:
3. Stream Impacts
If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site, then complete this
question for all stream sites impacted.
3a.
Stream impact
number -
Permanent (P) or
Temporary (T)
3b.
Type of impact
3c.
Stream name
3d.
Perennial
(PER) or
intermittent
(INT)?
3e.
Type of jurisdiction
(Corps - 404, 10
DWQ — non-404,
other)
3f.
Average
stream
width
(feet)
3g.
Impact
length
(linear
feet)
Impact 1
(Stream 1)
Grading & Lining
with Articulating
Concrete Block
UT to Smith Creek
(Section 404/Non-INT
Tidal)
® Corps
®DWQ
10
244
PER
P ❑ T
impact 2
P
(Stream 1)
Grading & Lining
with Articulating
Concrete Block
UT to Smith Creek
(Section 404/10 -
Inland Tidal —
Non -LAMA)
El PER
1 D
31
1 Corps
P ❑ T
• INT
' DWQ
Impact 3
(Stream 1)
Grading & Lining
with Articulating
Concrete Block
UT to Smith Creek
(Section 404/10 -
Inland Tidal -
CAMA)
10
41
/� PER
Corps
❑ INT
Ni DWQ
P ❑ T
3h. Total stream and tributary impacts
316
3i. Comments:
MAR 0 4 2021
Page 7 of 14
PCN Form — Version 1.3 December 10, 2008 Version

4. Open Water Impacts
If there are proposed impacts to lakes, ponds, estuaries, tributaries, sounds, the Atlantic Ocean, or any other open water of
the U.S. then individually list all open water impacts below.
4a.
Open water
impact number -
Permanent (P) or
Temporary (T)
4b.
Name of waterbody
(if applicable)
4c.
Type of impact
4d.
Waterbody type
4e.
Area of impact (acres)
01 ❑P■T
02 P
•
T
03
■P■T
04 ❑P■T
4f. Total open water impacts
4g. Comments:
5. Pond or Lake Construction
If pond or lake construction proposed, then complete the chart below.
5a.
Pond ID
number
5b.
Proposed use or purpose
of pond
5c.
Wetland Impacts (acres)
5d.
Stream Impacts (feet)
5e.
Upland
(acres)
Flooded
Filled
Excavated
Flooded
Filled
Excavated
Flooded
P1
P2
5f. Total
5g. Comments:
5h. Is a dam high hazard permit required?
❑ Yes ❑ No if yes, permit ID no:
5i. Expected pond surface area (acres):
5j. Size of pond watershed (acres):
5k. Method of construction:
6. Buffer Impacts (for DWQ)
If project will impact a protected riparian buffer, then complete the chart below. If yes, then individually list all buffer impacts
below. If any impacts require mitigation, then you MUST fill out Section D of this form.
6a.
Project is in which protected basin?
❑ Neuse ❑ Tar -Pamlico ❑ Other:
❑ Catawba ❑ Randleman
6b.
Buffer impact
number -
Permanent (P) or
Temporary (T)
6c.
Reason
for
impact
6d.
Stream name
6e.
Buffer
mitigation
required?
6f.
Zone 1 impact
(square feet)
6g.
Zone 2 impact
(square feet)
B1 ❑P❑T
Yes
❑ No
B2 ❑P❑T
El Yes
❑ No
B3 ❑ P ❑ T
❑ Yes
❑ No
6h. Total buffer impacts
6i. Comments:
Page 8 of 14
PCN Form - Version 1.3 December 10, 2006 Version

D. Impact Justification and Mitigation
1. Avoidance and Minimization
1 a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project.
The proposed impacts are necessary to correct the erosion within Stream 1 which is causing a reoccurring security issue by
undermining the perimeter security fence and creating openings through which humans and wildlife can access the airfield.
Since the erosion is occurring within a jurisdictional stream, impacts could not be avoided or minimized. It should be noted
that Stream 1 is highly degraded and has low functional value as a result of the erosion within the channel and historic
maintenance.
Stream 1 is a perennial stream which was historically channelized to convey stormwater drainage within approximately 37-
acres within the airport beyond the perimeter fence and into Smith Creek. Stream 1 experiences significant erosion of the
banks and downcutting of the stream bed with every rain event, resulting in sedimentation of the downstream section of
Stream 1 and ultimately Smith Creek. The proposed impacts from lining of Stream 1 will result in overall improvements to the
water quality within downstream portions of Stream 1 and Smith Creek by eliminating the current erosion and sediment
transport into these streams. WithersRavenel conducted an NCSAM functional assessment of Stream 1, which determined
that the functional value was "Low'.
Grading of the slopes and installation of the articulating concrete block lining will be completed "in the dry". This will be
accomplished through by blocking the upstream end of the perimeter road culvert and pumping stormwater drainage flow
around the project area and back into downstream portion of Stream 1. Additionally, the downstream culvert will also be
blocked to block tidal flow from entering the project area from downstream.
1 b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques.
Access during construction will be in uplands. Silt fencing will be installed around all disturbed areas in accordance with the
Sediment & Erosion Control Plan, which will be reviewed and approved by NCDMLR. Upon completion of grading, all areas
will be sodded with live grass sod to provide permanent stabilization.
2. Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State
2a. Does the project require Compensatory Mitigation for
impacts to Waters of the U.S. or Waters of the State?
I1 Yes ❑ No
2b. If yes, mitigation is required by (check all that apply):
Ki DWQ .. Corps
2c. If yes, which mitigation option will be used for this
project?
Mitigation bank
❑ Payment to in -lieu fee program
❑ Permittee Responsible Mitigation
3. Complete if Using a Mitigation Bank
3a. Name of Mitigation Bank: Northeast Cape Fear Urnbrella Mitigation Bank
3b. Credits Purchased (attach receipt and letter)
Type:
Stream — Non -Tidal and
Inland -Tidal
Quantity:
Stream -Non -Tidal — 122 If
Stream -Inland Tidal — 36 If
Page 9 of 14
PCN Form — Version 1.3 December 10, 2008 Version

3c. Comments: Letter of Availability from NECFUMB provided as an appendix.
4. Complete if Making a Payment to In -lieu Fee Program
4a. Approval letter from in -lieu fee program is attached.
❑ Yes
4b. Stream mitigation requested:
linear feet
4c. If using stream mitigation, stream temperature:
❑ warm ❑ cool ❑cold
4d. Buffer mitigation requested (DWQ only):
square feet
4e. Riparian wetland mitigation requested:
acres
4f. Non -riparian wetland mitigation requested:
acres
4g. Coastal (tidal) wetland mitigation requested:
acres
4h. Comments:
5. Complete if Using a Permittee Responsible Mitigation Plan
5a. If using a permittee responsible mitigation plan, provide a description of the proposed mitigation plan.
6. Buffer Mitigation (State Regulated Riparian Buffer Rules) — required by DWQ
6a. Will the project result in an impact within a protected riparian buffer that requires buffer
mitigation?
❑ Yes . No
6b. If yes, then identify the square feet of impact to each zone of the riparian buffer that requires mitigation. Calculate the
amount of mitigation required.
Zone
6c.
Reason for impact
6d.
Total impact
(square feet)
Multiplier
6e.
Required mitigation
(square feet)
Zone 1
3 (2 for Catawba)
Zone 2
1.5
6f. Total buffer mitigation required:
6g. If buffer mitigation is required, discuss what type of mitigation is proposed (e.g., payment to private mitigation bank,
permittee responsible riparian buffer restoration, payment into an approved in -lieu fee fund).
6h. Comments:
MAR 0 4 2021
Page 10 of 14
PCN Form — Version 1.3 December 10, 2008 Version

E. Stormwater Management and Diffuse Flow Plan (required by DWQ)
1. Diffuse Flow Plan
1 a. Does the project include or is it adjacent to protected riparian buffers identified
within one of the NC Riparian Buffer Protection Rules?
• Yes ®No
1 b. If yes, then is a diffuse flow plan included? If no, explain why.
Comments: The project is not located In a state buffered basin.
❑ Yes ❑ No
2. Stormwater Management Plan
2a. What is the overall percent imperviousness of this project?
N/A %
2b. Does this project require a Stormwater Management Plan?
❑ Yes i No
2c. If this project DOES NOT require a Stormwater Management Plan, explain why: The project will not create impervious
area which requires stormwater management.
2d. If this project DOES require a Stormwater Management Plan, then provide a brief, narrative description of the plan:
2e. Who will be responsible for the review of the Stormwater Management Plan?
❑ Certified Local Government
DWQ Stormwater Program
❑ DWQ 401 Unit
3. Certified Local Government Stormwater Review
3a. In which local government's jurisdiction is this project?
3b. Which of the following locally -implemented stormwater management programs
apply (check all that apply):
• Phase II
■ NSW
❑ USMP
❑ Water Supply Watershed
❑ Other:
3c. Has the approved Stormwater Management Plan with proof of approval been
attached?
❑ Yes ❑ No
4. DWQ Stormwater Program Review
4a. Which of the following state -implemented stormwater management programs apply
(check all that apply):
❑ Coastal counties
❑ HQW
❑ ORW
❑ Session Law 2006-246
❑ Other:
4b. Has the approved Stormwater Management Plan with proof of approval been
attached?
❑ Yes ❑ No
5. DWQ 401 Unit Stormwater Review
5a. Does the Stormwater Management Plan meet the appropriate requirements?
• Yes ❑ No
5b. Have all of the 401 Unit submittal requirements been met?
• Yes ❑ No
r.
cLC!
Page 11 of 14
PCN Form — Version 1.3 December 10, 2008 Version

F. Supplementary Information
1. Environmental Documentation (DWQ Requirement)
1 a. Does the project involve an expenditure of public (federal/state/local) funds or the
use of public (federal/state) land?
Yes ❑ No
1 b. If you answered "yes" to the above, does the project require preparation of an
environmental document pursuant to the requirements of the National or State
(North Carolina) Environmental Policy Act (NEPA/SEPA)?
0 Yes ❑ No
lc. If you answered "yes" to the above, has the document review been finalized by the
State Clearing House? (If so, attach a copy of the NEPA or SEPA final approval
letter.)
Comments: The proposed project is being funded by FEMA, which completed
NEPA review of the project. FEMA prepared a Record of Environmental
Consideration (REC) which determined that the proposed project met conditions for
authorization under a CATEX category *N9 — Federal Assistance for Hood Hazard
Reduction Actions. The FEMA REC has been provided as an attachment.
® Yes ❑ No
2. Violations (DWQ Requirement)
2a. Is the site in violation of DWQ Wetland Rules (15A NCAC 2H .0500), Isolated
Wetland Rules (15A NCAC 2H .1300), DWQ Surface Water or Wetland Standards,
or Riparian Buffer Rules (15A NCAC 2B .0200)?
❑ Yes I No
2b. Is this an after -the -fact permit application?
❑ Yes ' No
2c. If you answered "yes" to one or both of the above questions, provide an explanation of the violation(s):
3. Cumulative Impacts (DWQ Requirement)
3a. Will this project (based on past and reasonably anticipated future impacts) result in
additional development, which could impact nearby downstream water quality?
Yes ®No
3b. If you answered "yes" to the above, submit a qualitative or quantitative cumulative impact analysis in accordance with the
most recent DWQ policy. If you answered "no," provide a short narrative description.
The project consists of eliminating erosion within Stream 1 which creates security issues due to erosion undermining the
perimeter security fence and will not be a catalyst for future development that could impact nearby downstream water
quality.
4. Sewage Disposal (DWQ Requirement)
4a. Clearly detail the ultimate treatment methods and disposition (non -discharge or discharge) of wastewater generated from
the proposed project, or available capacity of the subject facility.
N/A — project will not generate sewage.
MAR 4 4 2021
Page l2of14
PCN Form — Version 1.3 December 10, 2008 Version

5. Endangered Species and Designated Critical Habitat (Corps Requirement)
5a. Will this project occur in or near an area with federally protected species or
habitat?
❑Yes 1 No
5b. Have you checked with the USFWS concerning Endangered Species Act
impacts?
Yes ❑ No
5c. If yes, indicate the USFWS Field Office you have contacted.
Raleigh
❑ Asheville
5d. What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical
Habitat?
SWR reviewed the NC Natural Heritage Program database, located at https://ncnhde.natureserve.org/, as well as
NCNHP GIS data to identify if there were any known occurrences of endangered species on or near the proposed project.
The review of the NHP data did not identify any recent occurrences of federally listed threatened or endangered species
or critical habitat on the subject property or within 1.0 miles of the project, see attached NCNHP project review letter.
Furthermore, site reviews did not identify any potential habitat for any federally protected species known to occur in New
Hanover County. Therefore, WR concludes that the proposed project will not adversely affect federally listed species or
their designated critical habitat.
Please note that in 2017 the USFWS issued a previous determination of "not likely to adversely affect" for the Wildlife
Mitigation Project for Wet Detention Basins and Open Ditches (AID: SAW-2016-00075) at ILM which consisted of similarly
situated project impacting an unnamed tidal tributary to Smith Creek.
6. Essential Fish Habitat (Corps Requirement)
6a. Will this project occur in or near an area designated as essential fish habitat?
❑ Yes ® No
6b. What data sources did you use to determine whether your site would impact Essential
WR reviewed the NOAA Essential Fish Habitat online mapper, located at:
http:llwww.habitat.noaa.govlprotection/efh/efhmappertindex.html. The EFH mapper
Fish Habitat?
classifies the Cape Fear River, located
the project will have sediment &
water, and therefore will not result
approximately 5 miles west of the project areas, as Essential Fish Habitat. However,
erosion control measures in place to prevent sediment from escaping into downstream
in adverse impacts to EFH within the Cape Fear River.
7. Historic or Prehistoric Cultural Resources (Corps Requirement)
7a. Will this project occur in or near an area that the state, federal or tribal
governments have designated as having historic or cultural preservation
status (e.g., National Historic Trust designation or properties significant in
North Carolina history and archaeology)?
❑ Yes 1 No
7b. What data sources did you use to determine whether your site would impact historic
WR reviewed the NC State Historic Preservation Office's online database, located
determine if there were any known historic or cultural resources within or in the
database review did not identify any known resources within or in the vicinity of
has determined that previous projects in the immediate vicinity of the proposed
or archeological resources?
at: http:llgis.ncdcr.govlhpowebl, to
vicinity of the proposed project. The
the proposed project, Additionally, SHPO
project would not affect historic resources.
MAR 0 4 2021
Page 13 of 14
PCN Form — Version 1.3 December 10, 2008 Version

8. Flood Zone Designation (Corps Requirement)
8a. Will this project occur in a FEMA-designated 100-year floodplain?
No
I Yes ❑
8b. If yes, explain how project meets FEMA requirements: The project has been approved by FEMA and was determined to
have no effect on the local floodplain (see attached FEMA Documentation).
8c. What source(s) did you use to make the
floodplain determination? www.ncfloodmaps.com
Trot/ Beasley WithersRavenel
Authorized Agent
Applicant/Agent's Printed Name
3
02/20/2021
Date
Applicant/Agent's Signature
(Agent's signature is valid only if an authorization letter from the applicant
is provided.)
Page 14 of 14
PCN Form — Version 1.3 December 10, 2008 Version

1110 WithersRavenet
Ou jr
AGENT AUTHORIZATION FORM
MAR 0 4 2021

AGENT AUTHORIZATION FOR CAMA PERMIT APPLICATION
Name of Property Owner Requesting Permit: New Hanover County Airport Authority
Mailing Address:
1740 Airport Blvd, Suite 112
Wilmington, NC 28405
Phone Number: 910-341-4333
Email Address: [e-mail]
I certify that 1 have authorized WithersRavenel, Inc
Agent f Contractor
to act on my behalf, for the purpose of applying for and obtaining all CAMA permits
necessary for the following proposed development:
New Hanover County Airport Authority - Ditch/Drainage Runoff Mitigation
at my property located at 1740 Airport Blvd
in New Hanover County.
1 furthermore certify that 1 am authorized to grant, and do in fact grant permission to
Division of Coastal Management staff, the Local Permit Officer and their agents to enter
on the aforementioned lands in connection with evaluating information related to this
permit application.
Property Owner Information:
Signature
A. Granseur Dick
Print or Type Name
Facilities Director
Title
11 / 13 / 2020
Date
This certification is valid through 12 / 31 / 2021 MAR

RIO WithersRavene&
ADJACENT PROPERTY OWNER EXHIBIT &
ADJACENT PROPERTY OWNER NOTIFICATION
CERTIFIED MAIL RETURN RECEIPT
MAR 0 4 2Q21

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SENDER: COMPLETE THIS SECTION
■ • Complete items 1, 2, and 3.
■ Print your name and address on the reverse
so that we can return the card to you.
■ Attach this card to the back of the mallpiece,
or on the front if space permits.
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MAR 0 4 2021

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If YES, enter deliveryaddress below: ❑ No
2 Article Number (Transfer from service label)
7020 1290 0000 4011 9978
3. Service Type
❑ Adult Signature
Q Adult Signature Restricted Delivery
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❑ Collect on Delivery Restricted Delivery
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PS Form 3811, July 2015 PSN 7530-02-000-9053
Domestic Return Receipt
" MAR 04 ?u

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SENDER: COMPLETE THIS SECTION
• Complete item 1, 2, and 3.
• Print your name and address on the reverse
so that we can return the card to you.
▪ Attach this card to the back of the mailpiece,
or on the front if space permits.
COMPLETE THIS SECTION ,lN DELIVERY
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