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Federal Point Public Boating Access Area

Created by Rob Walker on Jan 14, 2015  
Role: Designer;

This public boating access area operated by the North Carolina Wildlife Resources Commission underwent significant site improvements including a living shoreline for erosion protection, constructed wetland for stormwater management, and new boat launch ramps, parking, and drive aisles. 

General
Construction Cost: 
>$250K
Construction Dates: 
Estimated
2011
Kure Beach , NC
United States
33° 57' 31.0716" N, 77° 56' 30.2244" W
North Carolina US
Pre-Project Conditions
Major Plant Species Present: 
Spartina alterniflora (smooth cordgrass)
Submerged Aquatic Vegetation (SAVs) present?: 
No
Bank elevation above MHW: 
3.5 feet
Pre-Construction Erosion Present?: 
Yes
Pre-Construction Erosion at Adjacent Parcels?: 
No
Average Nearshore Slope: 
1:50.0
Existing Structures or Debris?: 
Yes
Describe Existing Structures or Debris at the Site: 
Derelict rock revetment protecting a gravel parking area. Boat basin with boat launch ramp defined by timber bulkhead.
Environmental Considerations
Name of Waterbody: 
Buzzard Bay
Site Classification: 
Cove
Maximum Exposed Fetch Distance: 
0.72 miles
Shoreline orientation relative to max. fetch distance: 
0 Degrees
Tidal Range: 
4.1 feet
Adjacent to Navigation Channel?: 
Yes
Boat wake exposure: 
Medium
Project Site Within a Designated No-Wake Zone?: 
No
Salinity: 
High: 30 ppt and above
Description of Nearby Structures: 
Approx. 5,000 linear feet rock structure separates Buzzard Bay ("The Basin") from the Cape Fear River. Structure was built by US Army Corps of Engineers to prevent breaching between the river and Atlantic Ocean.
Design Considerations
Was fill brought in?: 
Yes
Type of Fill: 
Sand
Amount of Fill: 
300 cubic yards
Source of Fill: 
Previously dredged material (sand/sediment) removed from the Fort Fisher Ferry Terminal during maintenance dredging. Material had been stockpiled in a designated dredged material disposal site.
Proposed nearshore slope: 
1:50.0
Area of shallow bottom conversion to marsh: 
9,000 sq ft
Area of upland conversion to marsh: 
0 square feet
Length of Project: 
200 feet
Average Project Width: 
100 feet
Width of Wetlands Above MHW: 
30 feet
Width of Wetlands Below MHW: 
30 feet
Design Criteria: 
Wave Height
Design Wave Height: 
2.0 feet
Structural Elements
Did the project involve a structure?: 
Yes
Type of Structure: 
rubble-mound sill
Describe construction materials: 
Armor stone 100-200 lbs, core stone 10-30 lbs, bedding stone 1-2", geotextile
Average distance of structure offshore (from existing MHW/NHW): 
30 feet
Average distance of structure offshore (from existing MLW/NLW): 
5 feet
Structure Base Width: 
27.0 feet
Length of Structure: 
200 feet
Structure Crest Width: 
2.0 feet
Area of shallow bottom conversion to structure: 
5,400 square feet
Width of Open Water Between Structure and Wetlands: 
60 feet
Structure Side Slope (V:H): 
1:2.0
Structure Monolithic or Layered: 
Layered
Height of Structure Above MHW: 
0.7 feet
Maximum depth at seaward edge of structure: 
3.5 feet
Maximum depth at landward edge of structure (including fill): 
3.5 feet
Drop downs, or openings or overlaps?: 
Yes
Width of drop downs or openings: 
15.0 feet
Spacing between gaps/ drop-downs: 
0 feet
Type of foundation: 
Geotextile Fabric and Bedding Stone
Was geotextile used in foundation?: 
Yes
Porosity of structure: 
Medium
Non-Structural Elements
Percentage of vegetative cover between structure and MHW line: 
100%
Was erosion fabric used for soil stabilization?: 
No
Primary Wetland species below MHW: 
Spartina alterniflora (smooth cordgrass)
Primary wetland species above MHW: 
Spartina patens (saltmeadow cordgrass)
Cross-section width of planted area: 
60 feet
Additional expected ecological benefits from project?: 
creation of marsh and intertidal habitat, improvement of water quality
Project Performance
Overall performance of Living Shoreline for erosion protection?: 
High
Overall performance of the structure and vegetation?: 
Medium
Describe overall erosion protection performance: 
No known concerns with further erosion at the site. It should be noted that the parking area is also stabilized by a short bulkhead, landward of the high marsh.
Storm Exposure: 
Do Not Know