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BUILDING STRONG®
Website:
http://www.saw.usace.army.mil/Missions/Regulatory
PermitProgram/MajorProjects
Public Hearing: Figure “8” Island
Shoreline Management Project
U.S. Army Corps of Engineers
POC: Mr. Mickey Sugg
Wilmington Regulatory Field Office
69 Darlington Avenue, Wilmington NC
28403
(910) 251-4811, or
[email protected]
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Tools Used to Evaluate Alternatives
• Geomorphic analysis of Rich Inlet and adjacent
shorelines (by Dr. William Cleary – Sub Appendix A
in SEIS)
• Numerical Models:
Primary – Delft3D
Secondary - GENESIS
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Geomorphic Analysis
Rich Inlet & Adjacent Shorelines (Dr. William Cleary Report – Sub Appendix A in SEIS)
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Shoreline Transects (Dr. William Cleary Report – Sub Appendix A in SEIS)
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Figure Eight Island 1938-2007 Shorelines (Dr. William Cleary Report – Sub Appendix A in SEIS)
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Hutaff Island 1938-2007 Shorelines (Dr. William Cleary Report – Sub Appendix A in SEIS)
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Channel Orientation versus Shoreline Change Northern 4,000 feet Figure Eight Island
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Maximum Recession at North End
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Rich Inlet September 2007
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Terminal Groin Alternatives Evaluated
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Alternative 2 – No New Action Delft3D Model - Initial Condition
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Alternative 2 – No New Action Delft3D Model - After 5-year Simulation
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Alternative 5D Delft3D Model - Immediately after Construction (Year 0)
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Alternative 5D Delft3D Model - 5-Years after Construction
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Typical Cross-Section Rubblemound Portion of Terminal Groin
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Construction Methodology Bald Head Island Example
Trench
Foundation Mat
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Construction Methodology Bald Head Island Example
Foundation Mat
Temp Offloading Pier
Approximately 60 – 70 feet
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Construction
Methodology Bald Head Island
Example
Completed
Section