M-0540A_Mod_Request_20230316

STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
ROY COOPER J. ERIC BOYETTE
GOVERNOR SECRETARY

Mailing Address:
NC DEPARTMENT OF TRANSPORTATION
DIVISION OF HIGHWAYS
5501 BARBADOS BOULEVARD
CASTLE HAYNE, NC 28429-5647
Telephone: [phone]
Fax: [phone]
Customer Service: 1-877 -368 -4968

Website: ncdot.gov
Location:
5501 BARBADOS BOULEVARD
CASTLE HAYNE, NC 28429 -5647

1

March 16, 2023

Mr. Stephen Lane
Coastal Management Representative, Transportation Projects
Division of Coastal Management
400 Commerce Ave.
Morehead City, NC 28557

Subject: Modification Request for removing debris and establishing additional
embankment, removing debris only, and limit of fill within existing coastal wetlands.
CAMA Major Permit No. 78-22, TIP No. M-0540A NC 24 Resiliency and Living
Shoreline Project. WBS No. 49083.3.1

Dear Mr. Lane,

The N.C. Department of Transportation, Division 3, is requesting a modification to the
above referenced permit for proposed changes to the existing permitted plan for the subject
project. The proposed changes are being requested due to previously unknown and
unsuitable fill materials discovered on site and discussions among agency personnel about
the goal of maintaining a portion of existing coastal wetlands on site. The agency
personnel discussions were held on-site on March 1, 2023. The attached plan modification
sketch summarizes the requested changes. The limits and areas of the requested changes
shown in the modification sketch have not been surveyed and are meant to be approximate
limits. An as-built survey plan sheet will be provided when the project is complete.

The changes include:

• Embankment area and slope area from approximately Sta. 23+75 to 24+75
(shown as blue and green shaded areas on the plan modification sketch):
Originally no supplemental Class 1 riprap was proposed in this area as the existing
embankment was thought to be stable. However, it was determined to be
unprotected embankment with sand, asphalt, broken concrete and other debris. For
the resilience and stability of the roadway, removal of the unsuitable fill materials
in the embankment area and installation of Class 2 riprap at a 3:1 slope to match the
proposed embankment on either side (east and west) is proposed. In the slope area,
2
Mailing Address:
NC DEPARTMENT OF TRANSPORTATION
DIVISION OF HIGHWAYS
5501 BARBADOS BOULEVARD
CASTLE HAYNE, NC 28429-5647
Telephone: [phone]
Fax: [phone]
Customer Service: 1-877 -368-4968
Website: ncdot.gov
Location:
5501 BARBADOS BOULEVARD
CASTLE HAYNE, NC 28429 -5647
removal of the unsuitable fill material, adding marine sand fill and grading to a 10:1
slope, and wetland grass plantings at the same density as in the existing landscape
plan are proposed.
•Slope area from approximately Sta. 23+00 to Sta. 24+50 (shown as red block
symbology on the plan modification sketch): Recently discovered unsuitable fill
and asphalt debris will be removed from this area.
•Slope area (beyond the embankment) from approximately Sta. 20+25 to 22+75
(shown as orange shaded area on the plan modification sketch): Originally
approved marine sand fill in this area will be limited with the goal to maintain the
existing coastal marsh (existing coastal wetland vegetation) in this area. However,
limiting the fill operations in this entire area may not be possible if field
measurements indicate additional fill is needed due to low areas or at the toe of
slope to protect the embankment.
In addition to the three changes detailed above, the department is also planning to
implement a truck mounted “Telebelt” (Telescopic Belt Conveyor) as the method of adding
the marine sand fill on the project. If this method is utilized, it will provide the benefit of
eliminating the replacement of the phase 1 and phase 2 “alternate trestle” during the marine
sand fill operation.
Please let me know if any additional information is needed in support of this request.
Sincerely,
Anneliese Westphal
NCDOT Division 3 Environmental Senior Specialist
[phone]
[e-mail]
ec:
Hannah Sprinkle, NCDEQ, DWR
Tom Steffens, USAC E