Protecting our Beaches South Amelia Island Shore Stabilization Project Nassau County, FL Mr. Drew Wallace President South Amelia Island Shore Stabilization Association (SAISSA) Mr. Bill Moore, AICP Project Manager, SAISSA Dr. Al Browder, P.E., D.CE Olsen Associates, Inc., Coastal Engineering Consultant Thoughtful Thursdays Amelia Island Plantation Community Association 27 April 2017 S. Amelia Island 1
SAISSA s Purpose: To protect, preserve, restore, and enhance the beach and dune system on the south end of Amelia Island March 2016 S. Amelia Island 2
Discussion topics Why maintain the beaches and dunes? Historical perspective How do we maintain the beach? Political and legal aspects What happens next? S. Amelia Island 3
Why maintain the beaches and dunes? Protect property from storm damage Preserve (and improve!) property values Restore environmental habitat Enhance recreational space October 2016 S. Amelia Island 4
Storm Protection Hurricane Matthew Flagler Beach Flagler County FDEP: Upland development and property landward of restored beaches fared much better than where beaches were narrow or eroded. (Clark, 2017 FSBPA Conference) S. Amelia Island 5
Storm Protection Hurricane Matthew Flagler Beach Flagler County Flagler Beach- Clark (2017) Damage to A1A and revetment FDEP: Upland development and property landward of restored beaches fared much better than where beaches were narrow or eroded. (Clark, 2017 FSBPA Conference) S. Amelia Island 6
Storm Protection Hurricane Matthew Vilano Beach St. Johns County FDEP: Upland development and property landward of restored beaches fared much better than where beaches were narrow or eroded. (Clark, 2017 FSBPA Conference) S. Amelia Island 7
Storm Protection Hurricane Matthew Vilano Beach - Clark (2017) Vilano Beach St. Johns County FDEP: Upland development and property landward of restored beaches fared much better than where beaches were narrow or eroded. (Clark, 2017 FSBPA Conference) S. Amelia Island 8
Storm Protection Hurricane Matthew 11 October 2016 South Amelia Island - Arc (2016) FDEP: Upland development and property landward of restored beaches fared much better than where beaches were narrow or eroded. (Clark, 2017 FSBPA Conference) S. Amelia Island 9
Historical Perspective 1984 Thanksgiving Day Storm Windsong / Beach Walker American Beach The Retreat State Park S. Amelia Island 10
Historical Perspective 1992/1993 Nor-easters Shipwatch / 4 th fairway Shipwatch / 4 th fairway Windsong Shipwatch / 4 th fairway Sheetpile wall Geo-tube revetment S. Amelia Island 11
Cumberland Island, Ga Regional Setting St. Mary s River Entrance FERNANDINA BEACH Amelia Island PROJECT AREA Nassau Sound LITTLE TALBOT ISLAND Atlantic Ocean Amelia Island: 13 miles Atlantic Ocean shoreline Project: 3.6 miles Burney Park to terminal groin Atlantic Ocean shoreline SAISSA: 3.0 miles AISP: 0.6 miles Ft. George Inlet St. John s River Entrance JACKSONVILLE S. Amelia Island 12
Initial beach protection efforts Before SAISSA was formed: 1970 s 1990 s: beach scraping 1980, 1984, 1991: truck haul dune repairs 1986: Agreement reached with the U.S. Navy St. Mary s River dredged sand to be placed on the beaches 1987-1993: 4.6 million cubic yards of sand placed Not a lot of sand placed directly on south beaches S. Amelia Island 13
Design Approach Feasibility study 1990 ALTERNATIVES ANALYSIS Do nothing Armor the shoreline Add sand via beach nourishment Stabilize sand via coastal structures S. Amelia Island 14
Beach Nourishment 1994, 2002, and 2011 1994 2011 1994 2011 2011 S. Amelia Island 15
Beach Nourishment Design - Plan view AMELIA ISLAND S. Amelia Island 16
Beach Nourishment Design - Plan view AMELIA ISLAND Omni State Park Burney Park rock terminal groin rock breakwater Atlantic Ocean S. Amelia Island 17
AMELIA ISLAND OMNI SHIPWATCH BEACH WALKER 1994 SCARP 1994 MHWL (pre-con) 1994 MHWL (post-con) ATLANTIC OCEAN S. Amelia Island 18
AMELIA ISLAND OMNI SHIPWATCH BEACH WALKER 1994 SCARP 1994 MHWL (pre-con) 1994 MHWL (post-con) ATLANTIC OCEAN S. Amelia Island 19
AMELIA ISLAND OMNI SHIPWATCH BEACH WALKER 1994 SCARP 1994 MHWL (pre-con) 2017 MHWL 1994 MHWL (post-con) ATLANTIC OCEAN S. Amelia Island 20
AMELIA ISLAND OMNI SHIPWATCH BEACH WALKER 1994 SCARP 1994 MHWL (pre-con) 2017 MHWL 1994 MHWL (post-con) ATLANTIC OCEAN beach profile S. Amelia Island 21
Beach Nourishment Design Profile & project evolution Eroded dune face Minimal high-tide beach area Pre-project profile offshore bar S. Amelia Island 22
Beach Nourishment Design Profile & project evolution Windsong Eroded dune face Minimal high-tide beach area offshore bar S. Amelia Island 23
Beach Nourishment Design Profile & project evolution Rebuilt dune Eroded dune face Windsong Beach fill sand Minimal high-tide beach area beach fill berm Pre-project profile offshore bar S. Amelia Island 24
Beach Nourishment Design Profile & project evolution Retreat Rebuilt dune Sanctuary Eroded dune face Windsong Beach fill sand Minimal high-tide beach area beach fill berm offshore bar Riverstone June 2002 S. Amelia Island 25
Beach Nourishment Design Profile & project evolution Design beach volume Advance fill volume - sacrificial Pre-project profile S. Amelia Island 26
Beach Nourishment Design Profile & project evolution Natural pioneer vegetation Design beach volume Advance Profile fill equilibration volume - sacrificial Pre-project profile S. Amelia Island 27
Beach Nourishment Design Profile & project evolution Natural pioneer vegetation Design beach volume Advance Profile fill equilibration volume - sacrificial Pre-project profile S. Amelia Island 28
Beach Nourishment Design Profile & project evolution January 2006 Natural pioneer vegetation Design beach volume Advance Profile fill equilibration volume - sacrificial Pre-project profile S. Amelia Island 29
Beach Nourishment Design Profile & project evolution Continued dune and vegetation growth Natural pioneer vegetation Design beach volume Advance Profile fill equilibration volume - sacrificial Narrowing beach Pre-project profile S. Amelia Island 30
Beach Nourishment Design Profile & project evolution Design beach volume Approaching Advance fill design volume beach - sacrificial condition Pre-project profile S. Amelia Island 31
Beach Nourishment Design Profile & project evolution Continued dune and vegetation growth Natural pioneer vegetation Design beach TIME volume Approaching TO RENOURISH Advance Profile fill equilibration volume - sacrificial Narrowing design beach beach ADVANCE condition FILL! Pre-project profile S. Amelia Island 32
Beach Nourishment Life Cycle (9-year example) Nourishment (construction) Time to renourish YOU ARE HERE! Annual monitoring survey
Atlantic Ocean Sand Sources Amelia Island 1.0 mile 1994 2011 2002 Need to Balance: Sand Quality Sand Volume Distance from project Water depth Environmental concerns AND COST!!! Nassau Sound Big Talbot Island Little Talbot Island S. Amelia Island 34
How is the current project performing? Prior to Hurricane Matthew Upper beach/nearshore performing as expected Data currently suggests renourishment needed in 2020 Elevation (Feet-NAVD) Offshore areas retaining more sand Unlike previous cycles What will that mean for the project? S. Amelia Island 35
Hurricane Matthew Impacts October 7-8, 2016 Damages to upper beach fill berm.erosion No upland structural damage from waves/overtopping ~220,000 cy of storm erosion along SAISSA properties Another ~64,000 cy in the Park portion of the project Beach debris S. Amelia Island 36
Hurricane Matthew Impacts S. Amelia Island 37
Next Steps Working with FEMA for Hurricane Matthew claim FEMA will issue a credit for reimbursement Continuing to monitor the project s performance Preparing for the next renourishment Sand Search Initiating permitting Project in 2020 at the earliest S. Amelia Island 38
Political and Legal Aspects March 2016 S. Amelia Island 39
Historical Perspective 1992/1993 Nor-easters Shipwatch / 4 th fairway Shipwatch / 4 th fairway Windsong Shipwatch / 4 th fairway Sheetpile wall Geo-tube revetment S. Amelia Island 40
SAISSA s Purpose: To protect, preserve, restore, and enhance the beach and dune system on the south end of Amelia Island March 2016 S. Amelia Island 41
SAISSA Incorporated in 1993 SAISSA, Inc. Trustees (11) Project Manager Association Manager General Counsel Coastal Engineer 7 Trustees 1 Trustee 1 Trustee AIPCA The Sanctuary Riverstone 1 Trustee 1 Trustee The Retreat Amelia Retreat Seaside Retreat The Residence Residence Condos Residence Single Family S. Amelia Island 42
Major SAISSA Milestones 1993: SAISSA founded MSBU created by Nassau County 1994: Initial beach restoration 2002: 1 st renourishment 2004: Structural stabilization of south tip of island In partnership with the Florida Park Service 2011: 2 nd renourishment S. Amelia Island 43
SAISSA s Project Partners Nassau County Board of County Commissioners Florida Park Service (since 2002) FDEP Beaches Program Florida Inland Navigation District (FIND) Amelia Island Tourist Development Council (TDC) S. Amelia Island 44
SAISS-MSBU Nassau County, FL Board of County Commissioners (BOCC) Project Manager: SAISSA BOCC Sitting as SAISS-MSBU Governing Board Nabors, Giblin and Nickerson, P.A. SAISS Municipal Service Benefit Unit 2,266 Residential Units 46 Commercial Properties S. Amelia Island 45
SAISSA MSBU Allocation of Funding Assessments TOTAL ASSESSMENT 13.5% Commercial 86.5% Residential 50% Base Rate 50% Category * Updated annually by neighborhood 50.00% (57.98%)* Oceanfront 25.00% (19.25%)* East of A1A 25.00% (22.77%)* West of A1A 70% Value 30% Units 70% Value 30% Units 70% Value 30% Units S. Amelia Island 46
Project & SAISSA: Sources of income Project Maintenance Assessments Capital Assessments State Cost-sharing TDC Grants SAISSA Member Assessments S. Amelia Island 47
Beach Nourishment Life Cycle (9-year example) 2020 Renourishment 2011 Nourishment Design & Permitting Renourish In 2020 YOU ARE HERE! sand search
WHAT S NEXT March 2016 S. Amelia Island 49