ESTC 2011 Presentation by Scott Liggett, Beach Renourishment

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ESTC 2011 Presentation by Scott Liggett, Beach Renourishment

  1. 1. 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.<br />Learn more about the ESTC: http://www.ecotourismconference.org<br />ESTC on Twitter: http://www.twitter.com/ESTC_Tourism<br />ESTC on Facebook: http://www.facebook.com/ESTC.Tourism<br />The International Ecotourism Society | web www.ecotourism.orgemail info@ecotourism.org | tel +1 202 506 5033<br />
  2. 2. BEACH RENOURISHMENT & MARINE ENVIRONMENT<br />Scott P. Liggett, P.E.<br />ScottL@hiltonheadislandsc.gov<br />Ecotourism and Sustainable <br />Tourism Conference<br />September 19-21, 2011 – Hilton Head Island, SC<br />
  3. 3. Presentation Overview<br /><ul><li>Town’s Beach Management Program
  4. 4. Overview
  5. 5. Project History
  6. 6. Funding
  7. 7. Port Royal Sound Shoreline Restoration and Stabilization Project</li></li></ul><li>Town of Hilton Head Island, SC<br />Incorporated in 1983<br />54 square miles<br />Approximately 1200 acres of Town Property – 144 Parcels<br />13 miles of beach<br />8 beach access parks<br />56 miles of pathways<br />Population – 40,000 (approx.) <br />Visitors 2,235,000 annually<br />
  8. 8. Atlantic Coast (Beach Processes)<br />Port Royal Sound (Beach and Inlet Processes)<br />South Beach (Beach and Inlet Processes)<br />Island’s Sandy Shorelines<br />
  9. 9. Early Planning<br /><ul><li>Incorporated Town immediately identified the need for a beach management strategy
  10. 10. 1986 - Shore Protection Task Group was created
  11. 11. Semi-annual beach monitoring initiated</li></li></ul><li>Mid-1980 Beach Conditions/Issues<br /><ul><li>Areas of Highly Erosional Shoreline
  12. 12. Chronic Sediment Deficit (northern 2/3)
  13. 13. Need for Comprehensive Protection of Upland
  14. 14. Minimal Dry Beach (over 9,000 feet of oceanfront armoring)
  15. 15. Potential impacts from Port Royal Sound Federal Navigation Project </li></li></ul><li>Typical Pre-Project Conditions - North Forest Beach<br />
  16. 16. (1995)<br />Typical Pre-Project Conditions - The Folly<br />
  17. 17. 1995<br />Typical Pre-Project Conditions – Port Royal Sound<br />
  18. 18. Alternatives for Long-Term Strategy (1986)<br />(Initial Program Philosophy)<br /><ul><li>No Action
  19. 19. Encourage Individuals to Protect Themselves (walls, limited sand placement, etc.)
  20. 20. Restore and Maintain Entire Beach System with </li></ul> Comprehensive Approach<br />
  21. 21. Program Foundation<br /><ul><li>Comprehensive Beach Restoration
  22. 22. Comprehensive Beach Monitoring
  23. 23. Strategic use of shore-stabilizing structures to improve performance/increase longevity of beach nourishment
  24. 24. Use of near-island sand sources, as available
  25. 25. Attempt to control seaward advancement of development and protect beach/dune resources</li></li></ul><li>Benefits of Comprehensive Beach Management Program<br /><ul><li>Recreational – Provides/maintains recreational amenity</li></ul> for tourists and residents<br /><ul><li>Storm/Erosion Protection – Provides/maintains buffer</li></ul>between ocean and upland<br /><ul><li>Environmental – Maintain beach habitat for</li></ul> turtles, birds, etc.<br /><ul><li>FEMA Benefits - Increase in “open space”</li></li></ul><li>BeachMonitoring<br />Island-wide Beach Monitoring Program<br /><ul><li>51 Beach Monitoring Stations (32 original)
  26. 26. Semi-annual survey data dating back to 1986
  27. 27. Annual Aerial Photography</li></ul>Overall Beach Conditions<br /><ul><li>Shoreline Position Change Rates
  28. 28. Beach volume status/change rates</li></ul>Comprehensive Project Planning<br />
  29. 29. Hilton Head IslandBeach Monitoring Stations<br />August 20, 2008<br />
  30. 30. HiltonHeadIslandBeachFillProjectHistory<br />1990 - Initial Restoration of Atlantic Shorefront<br />1997 - Renourishment of Atlantic Shorefront<br /> - Channel Relocation (Port Royal Plantation)<br /> - Restoration of a Portion of the Port Royal<br /> Shoreline<br /> - Terminal Groin at the Folly<br />1999 - South Beach Emergency Beach Fill Project<br />2006/07 – Renourishment of Atlantic Shorefront<br />- Renourishment of Port Royal Plantation<br /> - Renourishment of South Beach<br /> - Restoration of Fish Haul/Spa<br /> - Six Detached Breakwaters at the Folly<br />
  31. 31. 1990 – Atlantic Restoration<br />/ Channel Relocation<br />1997 – Atlantic Renourishment/Port Royal Restoration<br />1999 – South Beach Restoration/220,000 cy<br />2006/07-Atlantic-Port Royal-South Beach Renourishment / Fish Haul Restoration<br />Project History<br />
  32. 32. Program Summary<br /><ul><li>Approximately 7.5 MCY placed
  33. 33. Approximately 5.5 MCY remain
  34. 34. Atlantic shorefront is ~ 200 wider, on average, than pre-1990 conditions
  35. 35. Construction Cost To-Date: ~$40 Million</li></li></ul><li>ProgramPerformance<br /><ul><li>Highly Successful Program; performance of nourishment projects have far exceeded program expectations
  36. 36. Island-wide improvement in beach and dune conditions
  37. 37. Significant increase in access for recreational users/public
  38. 38. Reliable buffer between ocean and upland
  39. 39. Improved Sea Turtle Nesting Habitat
  40. 40. Critical Habitat Designation – Piping Plover</li></li></ul><li>Cumulative Beach Volume ChangeHilton Head Island Beach Nourishment – Atlantic Ocean Project Shoreline 1986-2011<br />
  41. 41. Palmetto Dunes<br />North Forest Beach<br />Pre-1990<br />Shoreline<br />Location<br />2006 – Project Completion<br />Benefits of Program<br />
  42. 42. 1989<br />2001<br />Benefits of Program<br />
  43. 43. 1989<br />2001<br />Benefits of Program<br />
  44. 44. Return on Investment<br />Recent inquiry / criticism: <br /> “beach renourishment is expensive”<br />2008 appraised valuations * ~ $2.8 Billion<br />2011 appraised valuations * ~ $3.9 Billion<br />2010 tax revenue ~ $31.5 Million<br />*First row only, not including golf courses which may have ocean frontage but are <br /> primarily large inland tracts of land<br />
  45. 45. BeachPreservationFee<br />(Established in 1993)<br /><ul><li>2% accommodation tax on overnight, short-term (less than 90 days) lodging
  46. 46. Preservation, maintenance, nourishment, renourishment, and improvement to the beaches and facilities related thereto
  47. 47. Generates approximately $4.4 M annually</li></li></ul><li>Other Typical Historic BeachPreservationFee Expenditures<br /><ul><li>Land Acquisition(open space preservation)
  48. 48. Park Development
  49. 49. Support Facilities(Public Works)
  50. 50. Natural Resources (sea turtles, plovers, dune plantings, etc.)
  51. 51. General Fund Transfer(prorated portions of salaries, etc.)
  52. 52. Establish Fund Balance($13 million)</li></li></ul><li>To-date, the Town has:<br /><ul><li>Purchased beachfront land at a cost of approximately $20,000,000
  53. 53. Constructed 8 beach parks providing 1401 parking spaces and pedestrian access to the beach
  54. 54. Incurred $400,000 annual maintenance costs
  55. 55. 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)</li></li></ul><li>Joiner Bank History<br />
  56. 56. Recent Shoreline Change Conditions at ‘The Heel”<br />
  57. 57. Port Royal Beach Restoration and Stabilization Project<br />Directive of Council – Aug. 2006<br />Multi-beam high resolution bathymetric survey – Oct. 2007 – Aug. 2008<br />Seismic sub-bottom survey <br />North Island Shoreline Change Study – Aug. 2008 (update to 1994 investigation)<br />Vibracores – Conducted Dec. 2008 – Jan. 2009<br />Remote Sensing Survey – Apr. 2009<br />Wave refraction/diffraction Modeling – August 2009 <br />Biological Assessment – Piping Plover Critical Habitat – August 2009<br />Project Permit Application – Made Sept 16, 2009, issued December 2, 2010<br />
  58. 58. <ul><li>Beach Nourishment with Shore Stabilizing Structure
  59. 59. Stabilize High Rate of Erosion at Heel and Incorporate Area into Future Renourishment Projects</li></ul>Proposed Plan of Action toAddress Heel Shoreline Erosion<br />
  60. 60. <ul><li>Heel Shoreline
  61. 61. North Forest Beach/Palmetto Dunes Shoreline</li></ul>Areas Most Likely to Need Future Nourishment<br />
  62. 62. Future Program Approach<br /><ul><li>A paradigm shift in the beach management program
  63. 63. The future objectives should focus on maintaining conditions rather than striving to continually widen the beach
  64. 64. Recent observations suggest that smaller projects in the future may be sufficient to maintain beach conditions
  65. 65. 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</li></li></ul><li>Thank You<br />BEACH RENOURISHMENT & MARINE ENVIRONMENT<br />Scott P. Liggett, P.E.<br />ScottL@hiltonheadislandsc.gov<br />Ecotourism and Sustainable <br />Tourism Conference<br />September 19-21, 2011 – Hilton Head Island, SC<br />

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