Pier 4 Time-Critical Removal Action
Client: Port of Tacoma
Overview of Floyd|Snider Contributions
Project Summary
As part of the Port of Tacoma’s process to design and permit the reconfiguration of Pier 4 (which consisted of aligning Pier 4 with Pier 3 within the Husky Container Terminal), soil and sediment samples were collected to characterize the project cutback material for open-water disposal or beneficial habitat reuse under the DMMP.
As part of the Port of Tacoma’s process to design and permit the reconfiguration of Pier 4 (which consisted of aligning Pier 4 with Pier 3 within the Husky Container Terminal), soil and sediment samples were collected to characterize the project cutback material for open-water disposal or beneficial habitat reuse under the DMMP. During the characterization sampling events, tributyltin (TBT)-contaminated sediment was identified underneath and at the face of Pier 4. Based on the magnitude of the exceedances, USEPA determined that the cleanup of these TBT-contaminated sediments was to proceed as a time-critical removal action. The work occurred under two distinct phases. Phase 1 included the USEPA time-critical removal of approximately 71,000 cubic yards (CY) of tributyltin-contaminated sediments located under Pier 4. Phase 2 included cutback of the existing bank to accommodate the pier reconfiguration and the open-water disposal of approximately 500,000 CY of sediment.
Our Approach
Floyd|Snider led a multidisciplinary team that supported the Port with the implementation of all phases of the Pier 4 Time-Critical Removal Action.
The Floyd|Snider Team worked closely with the Port and the regulatory agencies to implement the complex project on a highly accelerated schedule. Our team successfully supported the Port by integrating the cleanup requirements with the redevelopment operational goals to achieve the Port’s necessary project timeline. The time-critical removal action was completed within a few years of identifying the contaminated sediments. The Floyd|Snider Team provided assistance throughout construction implementation, negotiating all steps in the process with the USEPA and other regulatory stakeholders. Approximately 71,000 CY of TBT-contaminated sediment was dredged, transloaded, and disposed at an upland landfill.
Project Milestones:
2014. Agreed Order with USEPA for site evaluation
2015. Action memorandum for time‐critical removal action
2015. Second Administrative Order on Consent for Phase 1 removal action
2016. Phase 1 removal action completed
2018. Phase 2 pier reconfiguration completed
Floyd|Snider led a multidisciplinary team that supported the Port with the implementation of all phases of the Pier 4 Time-Critical Removal Action. This work included project management; multiagency team and stakeholder negotiations and coordination; DMMP and sediment cleanup characterization; remedial action work plan development; engineering design, including structural and geotechnical evaluations; berth deepening design; and significant integration of a new wharf structure with portions of an existing wharf.
The Floyd|Snider Team worked closely with the Port and the regulatory agencies to implement the complex project on a highly accelerated schedule. Our team successfully supported the Port by integrating the cleanup requirements with the redevelopment operational goals to achieve the Port’s necessary project timeline. The time-critical removal action was completed within a few years of identifying the contaminated sediments. The Floyd|Snider Team provided assistance throughout construction implementation, negotiating all steps in the process with the USEPA and other regulatory stakeholders. Approximately 71,000 CY of TBT-contaminated sediment was dredged, transloaded, and disposed at an upland landfill.
Project Milestones:
2014. Agreed Order with USEPA for site evaluation
2015. Action memorandum for time‐critical removal action
2015. Second Administrative Order on Consent for Phase 1 removal action
2016. Phase 1 removal action completed
2018. Phase 2 pier reconfiguration completed