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Terminal 117

Habitat Restoration & Public Shoreline Access



Terminal 117 (T117), formerly known as the Malarkey Asphalt Plant, is owned by the Port of Seattle and located on the west side of the Duwamish River adjacent to the Boeing Company, the South Park Marina, and several South Park residences.

Designated by the U.S. Environmental Protection Agency (EPA) as an Early Action Area as part of the Lower Duwamish Waterway Superfund site, T117 is undergoing cleanup construction as a joint project of the Port of Seattle and the City of Seattle with oversight by the EPA. The uplands cleanup included removal of pavement, derelict structures and 60,000 tons of soil and sediment. The next phase of the cleanup is slated for mid-2015 when the City of Seattle begins construction for the Streets and Stormwater phase of the project.

For more information about the cleanup, visit

Combining Community and Habitat

Following completion of T117 cleanup and the adjacent City of Seattle streets and stormwater work, the Port plans to reclaim the formerly contaminated industrial site as a location combining environmental health, accessible and safe open space, and fish and wildlife habitat for South Park citizens to include in community life.

Present plans, shaped by community ideas and comments, include public open space, habitat restoration, walkways, gathering spaces, viewpoints, interpretive information, access to the water, habitat, and public art.

The following project elements will create essential environmental restoration functions and inter-active opportunities for the residents of South Park. (link to the South Park community website)

North portion of site: (insert image here)

  • Public gathering area, seating, and entrance to shoreline pathways and viewpoints
  • Public art and interpretive features
  • Pathway and bridge to 275 feet long public pier and viewpoints
  • Interpretive trail to 0.5 acre restored marsh and riparian area
  • Marsh platform and stepping stone pathway
  • Hand-carried boat launch
Features at the south end of the site include: 
  • 5.5 acres of restored marsh and native riparian shoreline
  • 750 linear feet of lighted pathway to viewpoints and interpretive information
  • Access stairway to 35 feet high waterway and habitat viewing platform

Anticipated Project Timeline


100% Design ​ ​October 2014
​Environmental review and permitting ​November 2014
​Project autorization ​November 2014
​Contracting ​Winter 2014-2015
​Construction begins ​Summer 2015
​Project completion and community celebration ​2016

100% Design October 2014 Environmental Review and Permitting November 2014 Project Authorization November 2014 Contracting Winter 2014/2015 Construction Begins Summer 2015 Project completion (& community celebration) 2016

Key Contacts

Jon Sloan, Environmental Project Manager

Ticson Mach, Project Manager

Kristin Tollefson, Design Team Artist

Sally del Fierro, Community Engagement