ESTC 2011 Presentation by Scott Liggett, Beach Renourishment
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ESTC 2011 Presentation by Scott Liggett, Beach Renourishment

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    ESTC 2011 Presentation by Scott Liggett, Beach Renourishment ESTC 2011 Presentation by Scott Liggett, Beach Renourishment Presentation Transcript

    • This presentation was presented at the Ecotourism and Sustainable Tourism Conference 2011 (ESTC 2011), held in Hilton Head Island, South Carolina, USA, from September 19th-21st. Organized by The International Ecotourism Society (TIES), the ESTC is a unique annual conference providing practical solutions to advance sustainability goals for the tourism industry.
      Learn more about the ESTC: http://www.ecotourismconference.org
      ESTC on Twitter: http://www.twitter.com/ESTC_Tourism
      ESTC on Facebook: http://www.facebook.com/ESTC.Tourism
      The International Ecotourism Society | web www.ecotourism.orgemail info@ecotourism.org | tel +1 202 506 5033
    • BEACH RENOURISHMENT & MARINE ENVIRONMENT
      Scott P. Liggett, P.E.
      ScottL@hiltonheadislandsc.gov
      Ecotourism and Sustainable
      Tourism Conference
      September 19-21, 2011 – Hilton Head Island, SC
    • Presentation Overview
      • Town’s Beach Management Program
      • Overview
      • Project History
      • Funding
      • Port Royal Sound Shoreline Restoration and Stabilization Project
    • Town of Hilton Head Island, SC
      Incorporated in 1983
      54 square miles
      Approximately 1200 acres of Town Property – 144 Parcels
      13 miles of beach
      8 beach access parks
      56 miles of pathways
      Population – 40,000 (approx.)
      Visitors 2,235,000 annually
    • Atlantic Coast (Beach Processes)
      Port Royal Sound (Beach and Inlet Processes)
      South Beach (Beach and Inlet Processes)
      Island’s Sandy Shorelines
    • Early Planning
      • Incorporated Town immediately identified the need for a beach management strategy
      • 1986 - Shore Protection Task Group was created
      • Semi-annual beach monitoring initiated
    • Mid-1980 Beach Conditions/Issues
      • Areas of Highly Erosional Shoreline
      • Chronic Sediment Deficit (northern 2/3)
      • Need for Comprehensive Protection of Upland
      • Minimal Dry Beach (over 9,000 feet of oceanfront armoring)
      • Potential impacts from Port Royal Sound Federal Navigation Project
    • Typical Pre-Project Conditions - North Forest Beach
    • (1995)
      Typical Pre-Project Conditions - The Folly
    • 1995
      Typical Pre-Project Conditions – Port Royal Sound
    • Alternatives for Long-Term Strategy (1986)
      (Initial Program Philosophy)
      • No Action
      • Encourage Individuals to Protect Themselves (walls, limited sand placement, etc.)
      • Restore and Maintain Entire Beach System with
      Comprehensive Approach
    • Program Foundation
      • Comprehensive Beach Restoration
      • Comprehensive Beach Monitoring
      • Strategic use of shore-stabilizing structures to improve performance/increase longevity of beach nourishment
      • Use of near-island sand sources, as available
      • Attempt to control seaward advancement of development and protect beach/dune resources
    • Benefits of Comprehensive Beach Management Program
      • Recreational – Provides/maintains recreational amenity
      for tourists and residents
      • Storm/Erosion Protection – Provides/maintains buffer
      between ocean and upland
      • Environmental – Maintain beach habitat for
      turtles, birds, etc.
      • FEMA Benefits - Increase in “open space”
    • BeachMonitoring
      Island-wide Beach Monitoring Program
      • 51 Beach Monitoring Stations (32 original)
      • Semi-annual survey data dating back to 1986
      • Annual Aerial Photography
      Overall Beach Conditions
      • Shoreline Position Change Rates
      • Beach volume status/change rates
      Comprehensive Project Planning
    • Hilton Head IslandBeach Monitoring Stations
      August 20, 2008
    • HiltonHeadIslandBeachFillProjectHistory
      1990 - Initial Restoration of Atlantic Shorefront
      1997 - Renourishment of Atlantic Shorefront
      - Channel Relocation (Port Royal Plantation)
      - Restoration of a Portion of the Port Royal
      Shoreline
      - Terminal Groin at the Folly
      1999 - South Beach Emergency Beach Fill Project
      2006/07 – Renourishment of Atlantic Shorefront
      - Renourishment of Port Royal Plantation
      - Renourishment of South Beach
      - Restoration of Fish Haul/Spa
      - Six Detached Breakwaters at the Folly
    • 1990 – Atlantic Restoration
      / Channel Relocation
      1997 – Atlantic Renourishment/Port Royal Restoration
      1999 – South Beach Restoration/220,000 cy
      2006/07-Atlantic-Port Royal-South Beach Renourishment / Fish Haul Restoration
      Project History
    • Program Summary
      • Approximately 7.5 MCY placed
      • Approximately 5.5 MCY remain
      • Atlantic shorefront is ~ 200 wider, on average, than pre-1990 conditions
      • Construction Cost To-Date: ~$40 Million
    • ProgramPerformance
      • Highly Successful Program; performance of nourishment projects have far exceeded program expectations
      • Island-wide improvement in beach and dune conditions
      • Significant increase in access for recreational users/public
      • Reliable buffer between ocean and upland
      • Improved Sea Turtle Nesting Habitat
      • Critical Habitat Designation – Piping Plover
    • Cumulative Beach Volume ChangeHilton Head Island Beach Nourishment – Atlantic Ocean Project Shoreline 1986-2011
    • Palmetto Dunes
      North Forest Beach
      Pre-1990
      Shoreline
      Location
      2006 – Project Completion
      Benefits of Program
    • 1989
      2001
      Benefits of Program
    • 1989
      2001
      Benefits of Program
    • Return on Investment
      Recent inquiry / criticism:
      “beach renourishment is expensive”
      2008 appraised valuations * ~ $2.8 Billion
      2011 appraised valuations * ~ $3.9 Billion
      2010 tax revenue ~ $31.5 Million
      *First row only, not including golf courses which may have ocean frontage but are
      primarily large inland tracts of land
    • BeachPreservationFee
      (Established in 1993)
      • 2% accommodation tax on overnight, short-term (less than 90 days) lodging
      • Preservation, maintenance, nourishment, renourishment, and improvement to the beaches and facilities related thereto
      • Generates approximately $4.4 M annually
    • Other Typical Historic BeachPreservationFee Expenditures
      • Land Acquisition(open space preservation)
      • Park Development
      • Support Facilities(Public Works)
      • Natural Resources (sea turtles, plovers, dune plantings, etc.)
      • General Fund Transfer(prorated portions of salaries, etc.)
      • Establish Fund Balance($13 million)
    • To-date, the Town has:
      • Purchased beachfront land at a cost of approximately $20,000,000
      • Constructed 8 beach parks providing 1401 parking spaces and pedestrian access to the beach
      • Incurred $400,000 annual maintenance costs
      • Constructed 3 large-scale restoration/ renourishment projects (including the use of structures) placing more than 7 million cubic yards of sand at a total cost of ~$40,000,000 (1986-present)
    • Joiner Bank History
    • Recent Shoreline Change Conditions at ‘The Heel”
    • Port Royal Beach Restoration and Stabilization Project
      Directive of Council – Aug. 2006
      Multi-beam high resolution bathymetric survey – Oct. 2007 – Aug. 2008
      Seismic sub-bottom survey
      North Island Shoreline Change Study – Aug. 2008 (update to 1994 investigation)
      Vibracores – Conducted Dec. 2008 – Jan. 2009
      Remote Sensing Survey – Apr. 2009
      Wave refraction/diffraction Modeling – August 2009
      Biological Assessment – Piping Plover Critical Habitat – August 2009
      Project Permit Application – Made Sept 16, 2009, issued December 2, 2010
      • Beach Nourishment with Shore Stabilizing Structure
      • Stabilize High Rate of Erosion at Heel and Incorporate Area into Future Renourishment Projects
      Proposed Plan of Action toAddress Heel Shoreline Erosion
      • Heel Shoreline
      • North Forest Beach/Palmetto Dunes Shoreline
      Areas Most Likely to Need Future Nourishment
    • Future Program Approach
      • A paradigm shift in the beach management program
      • The future objectives should focus on maintaining conditions rather than striving to continually widen the beach
      • Recent observations suggest that smaller projects in the future may be sufficient to maintain beach conditions
      • Following completion of the Port Royal Shoreline Restoration and Stabilization Project in 2011, island-wide periodic nourishment projects may only need to be about 60 percent of the size of the past projects
    • Thank You
      BEACH RENOURISHMENT & MARINE ENVIRONMENT
      Scott P. Liggett, P.E.
      ScottL@hiltonheadislandsc.gov
      Ecotourism and Sustainable
      Tourism Conference
      September 19-21, 2011 – Hilton Head Island, SC