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Coffee Island Breakwaters

Created by Beau Buhring on Jan 07, 2015  
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General
Construction Dates: 
Estimated
2010
Bayou la Batre , AL
United States
30° 20' 5.5176" N, 88° 15' 10.1088" W
Alabama US
Pre-Project Conditions
Submerged Aquatic Vegetation (SAVs) present?: 
Yes
Pre-Construction Erosion Present?: 
Yes
Pre-Construction Erosion at Adjacent Parcels?: 
Yes
Existing Structures or Debris?: 
Do Not Know
Environmental Considerations
Name of Waterbody: 
Portersville Bay
Maximum Exposed Fetch Distance: 
12.00 miles
Shoreline orientation relative to max. fetch distance: 
30 Degrees
Tidal Range: 
1.2 feet
Adjacent to Navigation Channel?: 
No
Boat wake exposure: 
Medium
Project Site Within a Designated No-Wake Zone?: 
No
Salinity: 
Brackish: 0.5 – 30 ppt
Design Considerations
Was fill brought in?: 
No
Length of Project: 
3,300 feet
Structural Elements
Did the project involve a structure?: 
Yes
Type of Structure: 
breakwater
Describe construction materials: 
Bagged oyster shell and proprietary concrete materials ("ReefBlks", "ReefBalls").
Average distance of structure offshore (from existing MHW/NHW): 
100 feet
Length of Structure: 
2,430 feet
Area of shallow bottom conversion to structure: 
61,750 square feet
Width of Open Water Between Structure and Wetlands: 
100 feet
Structure Monolithic or Layered: 
Layered
Height of Structure Above MHW: 
0.0 feet
Maximum depth at seaward edge of structure: 
3.2 feet
Maximum depth at landward edge of structure (including fill): 
3.2 feet
Drop downs, or openings or overlaps?: 
Yes
Width of drop downs or openings: 
30.0 feet
Was geotextile used in foundation?: 
I Dont Know
Non-Structural Elements
Percentage of vegetative cover between structure and MHW line: 
0%
Additional expected ecological benefits from project?: 
Marsh protection, oyster and fish habitat.

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