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Sediment Cleanup and Restoration of the Eddon Boatyard Property in Gig Harbor, WA

Sediment Cleanup and Restoration of the Eddon Boatyard Property in Gig Harbor, WA. Presented by Joe Pursley and Heather Page June 2009. Aerial View of pre-construction Property, Gig Harbor, WA. Eddon Boatyard Property. Significant portion of Gig Harbor’s waterfront

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Sediment Cleanup and Restoration of the Eddon Boatyard Property in Gig Harbor, WA

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  1. Sediment Cleanup and Restoration of the Eddon Boatyard Property in Gig Harbor, WA Presented by Joe Pursley and Heather Page June 2009

  2. Aerial View of pre-construction Property, Gig Harbor, WA

  3. Eddon Boatyard Property • Significant portion of Gig Harbor’s waterfront • Residents approved $3.5 million Proposition No. 1 Bond to preserve in 2004 • City purchased the property in 2005 • Environmental remedial actions were coordinated through Anchor with the USEPA, and WA Department of Natural Resources

  4. Pre-existing Marine Structures

  5. Pre-existing Marine Structures

  6. Pre-existing Marine Structures

  7. Cleanup Actions • Application submittal to WA Department of Ecology Voluntary Cleanup Program • Development of cleanup and restoration approach for site • Delineation of chemical criteria and impacted areas at property • Coordination with federal, state, and local agencies during SEPA evaluation and permitting process

  8. Contaminants with Elevated Concentrations • Mercury • Copper • Lead • Phthalates • Polychlorinated biphenyls (PCBs) • Polycyclic aromatic hydrocarbons (PAHs) • Tributyltin (TBT)

  9. Layout of Remedial Actions on Property

  10. Cleanup Actions Summary • Demolition and removal of existing marine and shoreline creosote treated timber • Deconstruction, salvage, and temporary relocation of floating dock, gangway, and carraigeways • Dredging and removal of contaminated marine sediments • Excavation and removal of contaminated upland soils • Clean backfill placement/capping • Reconfiguration of nearshore land to gentle slope

  11. Project Permitting and Public Outreach • As required by the AO, project permitting was coordinated with Ecology, WDFW, Corps, DNR, NOAA, and the City • Hydraulic Project Approval • Shoreline Management Substantial Development Permit • Mitigated Determination of Non-significance • Water Quality Certification from Ecology • Joint Aquatic Resources Permit Application • Endangered Species Act Concurrence • Certificate of Appropriateness and Clearing Grading Permit from the City • US Corps of Engineers • City State Environmental Policy Act Process

  12. Environmental Resources • Evaluating baseline conditions • Identifying impacts • Avoidance and minimization measures • Natural resources on site: • Wetland • Stream • Tidal flats/nearshore habitat • Historical and cultural resources • Water quality

  13. Category II Wetland

  14. Stream

  15. Tidal Flats/Nearshore Habitat

  16. Historic Preservation • Washington State Department of Archaeology and Historic Preservation identified historic value • Boathouse and associated structures • Nearby single family unoccupied residence • Memorandum of Agreement • Signed on March 14th • Preservation, salvage, and documentation of historic structures • Archeological observation of ground disturbances

  17. Dismantling of boat haul-out carriage for salvage

  18. Tangible cultural resources found on site

  19. Environmental Compliance Measures • Permits required use of environmental BMPS • Continuous/full enclosure of waterside work are with floating boom and silt curtain • Contain suspended solids • Any material that may have been disturbed into the water • Saltmarsh vegetation area was protected and surrounded by high-visibility fencing • Stabilize new stream outflow

  20. Containment boom and silt curtain (left) and high visibility fence around saltmarsh vegetation area (right)

  21. Daylighting stream process

  22. Ecology WQC Requirements • Turbidity monitoring • Confirmatory sampling for areas of excavation and dredging. • Further soil testing: • Upland area where bulkhead was removed • Area regarded to form a beach

  23. Eventual goals of Gig Harbor BoatShopfrom www.gigharborboatshop.org

  24. Run by core members of the Friends of Eddon Boat • Grassroots group that spearheaded a campaign to save the site • 62 percent of Gig Harbor residents voted "yes" to pass the bond that enabled the city to purchase the Eddon Boatyard site to create heritage programming and a recreational park

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