19890051 Ver 4_CAMA_Major_Narrative_Letter_to_NCDEQ_-_Revised_20211013

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ARDURRA
COLLABORATE. INNOVATE. CREATE.
October 13, 2021
Mrs. Tara MacPherson
NCDEQ — DCM — Wilmington Office
127 Cardinal Dr Extension
Wilmington, NC 28405
Re: Town of Carolina Beach Marina Renovation
CAMA Major Permit Modification - PERMIT No 86-18 - Rev 1
Carolina Beach, NC
ARDURRA Group North Carolina is pleased to submit herein our request for a Modification to the
Existing CAMA Major Permit No. 86-18 as an authorized agent for the Town of Carolina Beach.
The Town of Carolina Beach is in the process of undertaking a capital project to renovate the
remainder of the Town's Commercial Marina located at 110 Carl Winner Drive, which was
damaged during Hurricane Florence. The scope of work outlined within this Major Modification
to Permit 86-18 was described within the original Permit Package as Phases IV and V but was not
permitted at that time. This modification seeks to obtain a CAMA Permit for the final phases of
the Marina Rehabilitation and Upfit.
This narrative was revised based on the request for additional information letter produced by DWR
during the permit review period.
PROJECT SITE BACKGROUND:
As indicated in the original Permit Application, the history of the Town of Carolina Beach Boat
Basin can be dated back to 1939 when the USACE indicates that bulkheads, wharf, and mooring
improvements were made to the marina. Based on historical aerial photographs, the Carolina
Beach Town Marina has been utilized as a commercial marina since 1966 and has functioned in
its current arrangement since 1981. In the 1981 photo, the Marina is bound on the East, West and
Ardurra Group North Carolina
3809 Peachtree Avenue, Suite 102 I Wilmington, NC 28403 I 910.397.2929 I www.ardurra.com

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South Sides by sheet pile retaining wall with a timber relieving platform located along the
southern wall.
The transient dock facility was constructed in 2010 in the south-east corner of the marina.
In 2017, the western portion of the marina renovation was begun to repair damage sustained
during Hurricane Matthew. These repairs included the installation of 235' of new steel sheet pile
retaining wall under two CAMA General Permits. This revitalization effort was continued in 2018
and included new floating docks for nine (9) slips, a new pump out station, and dredging along
the western side of the marina, all of which was completed under CAMA Permit 86-18.
PERMIT HISTORY:
1. December 19, 2016 — DCM issued a General CAMA Permit for emergency repair to the
southern portion of the western bulkhead.
2. August 23, 2017 — DCM issued a General CAMA Permit for emergency repair to the
northern portion of the western bulkhead. This permit was approved with the project as
an Urban Waterfront Designation.
3. January 3, 2018 — DCM issued a General CAMA Permit for the same work identified in item
2 above due to the permit expiring. This permit was approved with the project as an Urban
Waterfront Designation.
4. August 10, 2018 — DCM issued a CAMA Major Permit (No. 86-18) for the western slips,
pump out and dredging of the western side.
5. May 8, 2019 — DCM issued a minor modification to Permit 86-18 for the repair of the
elevated timber deck, wall repair, and stormwater pipe repair in the northeastern corner
of the basin.
EXISTING CONDITIONS:
Water Structures & Docks
Currently, the south and eastern walls of the marina are supported by anchored timber navy style
walls that were damaged by Hurricane Florence or were are otherwise in significant disrepair. The
eastern wall generates a significant concern for the Town due to its proximity to Canal Drive and
the underground utilities located within that roadway.
The eastern thirteen (13) slips are accessed directly from the timber boardwalk along East Canal
Drive by means of timber access ladders to small, elevated timber finger piers. The stern section
of each commercial slip is marked by signage for the charter vessel and have an existing
approximate water depth of -8' +/-.

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The southern six (6) were historically utilized for larger head boats and access to the vessels is by
means of an approximately 12' wide elevated timber board walk / relieving platform. The board
walk also housed a ticket booth and signage for each vessel. The average water depth at the
exiting boat slips is approximately -10' +/-.
Upland Area
The area immediately behind the eastern sheet pile wall is a timber board walk that is in significant
need of repair and currently has sections that are out of compliance with regards to ADA. The
boardwalk serves as a pedestrian walkway running along Canal Drive, which is a two-lane roadway
that serves as one of two means of access to the north end of Carolina Beach. Due to the partial
wall failure during Hurricane Florence, a section of the roadway has developed significant cracking
of the traffic ware surface and movement of the sub -base and will require replacement. All of the
above is within the 30' AEC setback. Total percentage of existing impervious area within the AEC
setback along the eastern wall is 80%.
The area immediately behind the southern sheet pile wall is comprised of a 12' wide gravel access
road used for EMS/Fire and delivery vehicles to the larger vessels. Beyond the access road, the
area is a grass island / park space with stamped concrete sidewalks, several areas of plantings, a
flagpole, and an existing pump out station. Per information from town records, the access road
and a portion of the park are in the approximate location of the original alignment of Carl Winner
Drive. As such, critical underground utilities for the northern end of Carolina Beach run within this
area. Total percentage of existing impervious area within the AEC setback along the southern wall
is 50%.
Stormwater Management
Currently, stormwater within the area of the eastern and southern sections of the marina is
handled by a combination of catch basins with discharge pipes and sheet flow into the marina.
The stormwater along the eastern side of the marina is collected into catch basins along Canal
Drive on the east and discharged into the marina by four (4) stormwater pipes. The stormwater
along the southern side of the marina is collected into catch basin along Carl Winner Dr and
discharged by three (3) stormwater pipes into the marina.
PROPOSED MODIFICATIONS
The modifications proposed in this Major Permit Modification include the following
improvements, which are in compliance with Town of Carolina Beach Planning and Zoning
requirements, and the Town requests that the project be considered under the designation of
Urban Water Front per 15A NCAC 07H.0209 part (g):

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West Side
• Replace one of the existing, permitted, slips with a floating kayak launch.
• Permit three (3) transient / day slips to be located in the southwest corner of the boat
basin as defined in the attached permit documents as slips 10-W thru 12-W.
South Side
• Replace 260 linear feet of timber sheet pile retaining wall with new anchored steel sheet
pile retaining wall located approximately 3' outboard of the existing wall. This will tie into
the existing steel sheet pile wall in the southwest corner of the marina.
• Remove the existing elevated timber reliving platform.
• Provide a layout for four (4) commercial slips designated and four (4) transient slips
designated 1-S thru 8-S.
• Provide ADA access to the slips by means of two elevated timber access platforms
supporting aluminum gangways that will access the new 10' wide main floating dock. Each
pair of slips will be provided access by means of 6' wide floating finger piers.
• The western most access platform is proposed to be a 200 SF observation/unloading
platform with an ADA viewing station to provide northern views of the marina and the
Myrtle Grove Sound.
• Provide midship breasting and spring line piles for each slip. All new piles will be outside
of the USACE setback line. Four (4) existing piles are located within the setback line and
will remain in place and will continue to be used as spring piles.
• The upland area is defined as the contractor laydown yard and is shown within the
proposed Erosion and Control Plan. This area will be reconstructed in a similar manner
and for similar use as current conditions, with the percentage of impervious surfaces within
the AEC to be equal to or less than currently defined.
• Provide a code complaint handrail along the length of the boat basin that will be
supported by the concrete cap of the sheet pile system.
• Provide flood check valves on the stormwater discharge pipes within the southern wall.
• Provide commercial signage and "fish boards" for each vessel. These will be incorporated
into the hand rail design to allow for a clean, uniform look.
• Complete minor road modifications to reclaim approximately 600 SF of impervious road
surface to pervious grass/park area outside of the AEC setback.
• Provide a new 20' x 20' information building/kiosk for the commercial harbor that will be
located outside of the AEC set back.

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East Side
• Replace 421 linear feet of timber sheet pile retaining wall with new anchored steel sheet
pile retaining wall located approximately 3' outboard of the existing wall.
• Provide a layout for fourteen (14) commercial slips designated as 1 E thru 14E.
• Provide ADA access to the slips by means of three elevated timber access platforms
supporting aluminum gangways that will access the new 8' wide main floating docks. Each
pair of slips will be provided access by means of 6' wide floating finger piers.
• The southernmost access platform is a proposed replacement if an existing 400 SF
observation platform. The new platform will be of the same footprint and will have ADA
viewing stations to provide westward and southern views of the marina.
• Provide spring line and midship breasting piles for each slip. All piles will be outside of
the USACE setback line.
• The existing timber board walk is proposed to be replaced with elevated concrete "hog -
slat" sidewalk structure supported by a low capacity pile system. The use of the "hog -slat"
is proposed to maintain the sidewalk / board walk area as pervious.
• Provide a code complaint handrail along the length of the boat basin that will be
supported by the concrete cap of the sheet pile system.
• Due to the roadway damage, the town is proposing to remove and replace the roadway
along Canal Drive within the vicinity of the project.
• Complete the repairs to the elevated wooden platform and stormwater discharge located
in the northeastern corner of the basin as identified and approved in the minor
modification to permit 86-18.
• Provide commercial signage and "fish boards" for each vessel. These will be incorporated
into the hand rail design to allow for a clean, uniform look.
Dredging
Approximately 2,790 CYof material is proposed to be removed from the southern slip and eastern
slip area that would bring the total proposed for the entire marina to approximately 5,020 CY for
the total proposed project, dredged to -8'. The current water depths within the proposed dredge
area vary from -4' to -10'. The sheet pile retaining walls will be designed for a maximum proposed
dredge depth of -8' (-6 plus a -2' over dredge) for the southern and eastern portions of the project.
Dredging will be completed by mechanical means (bucket to barge) with an "environmental bucket".
The dredge spoil will be placed in drying pens on the high ground contractor laydown area more
than 30 feet from the HWL. The laydown area is currently identified within the permit package and
is located adjacent to Carl Winner Dr. Standard erosion and sedimentation control measures will
be placed around the drying pens and the laydown area, as shown within the permit package
drawings, to control stormwater runoff Once the material has dried, the material will be transported
to a permitted and approved disposal site by means of a dump truck with a debris cover.

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The Town will coordinate with the contractor to identify an approved and permitted disposal area
that has sufficient volume and permitted to take the dredge material. For the most recent dredge
completed in June of 2018 of 1,000 CY within the basin, the contractor reached an agreement and
disposed of the material at the New Hanover County Landfill. Since the material proposed to be
removed is of similar quality, and containing of similar levels and types of contaminants (see below),
the Town has a reasonable expectation that an agreement with the NHC Landfill can be reached by
the contractor or the contractor will be able to secure a consistent agreement with a private
permitted spoil disposal area.
Dredging activities would not commence until the permitted disposal site has been identified and
CAMA and other permitting agencies have been notified and approval from the regulatory agencies
received by the Town.
The previous contractor and engineering team previously commissioned TI Costal to obtain and
complete laboratory test samples within the Boat Basin and reference samples within the ICW. The
dredge spoil was found to have contaminants listed within 40CFR 267.24, 40 CFR 261.30-267.33.
The sampling locations and test results are attached.
Environmental Protection During Construction
A floating turbidity curtain will be used during all phases of the bulkhead replacement and
construction. In addition, sedimentation and erosion control devices will be required for high
ground work during construction. Total disturbed area on the high ground is approximately 0.9
acres.
SUMMARY:
The Town of Carolina Beach Commercial Marina has been in operation for nearly a decade, and
the proposed repair, replacements, and improvements are necessary for the marina to continue
to provide commercial water access for charter captains and their guests. The project is proposed
to be completed as a single project as outlined within the narrative and the attached permit
documents. The Town views DCM as an important stakeholder in the project and will coordinate
with DCM throughout the construction process. We respectfully request review and approval of
this Major Modification to CAMA Major Permit 86-18.

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Respectfully Submitted,
DocuSigned by:
ark E
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Structural Group Leader
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March 22, 2021
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