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SEPA Notification

King County is issuing a Determination of Non-Significance under the State Environmental Policy Act (SEPA) for an Interim Clean-up Action of contaminated soil at the Maury Island Natural Area.

Read the documents here. Comments will be accepted through August 4, 2016.


*Clean-up Update, 07/07/2016*

In response to feedback from the June 20 public meeting on the Maury Island Natural Area contaminated soil cleanup, King County is reducing the scope of the Interim Action cleanup plan in 2016. The work in 2016 will include restoration of three to four acres of blackberry and Scot's broom with native plants. We will also be taking more time to research trail cleanup alternatives. The plan for the trails, as well as for the cleanup of the skeet range, will be presented to the public for comment in late 2016 or early 2017 as part of the process to finalize the Feasibility Study with the Washington Department of Ecology.

To allow time to modify documents related to the Interim Action, the King County SEPA public notice and comment period will now be from July 21 to August 4. The Washington Department of Ecology public notice comment period will be from July 18 to August 16.

Read the updated Interim Action Clean-Up Plan.


Located on the southeast shore of Maury Island on lands formerly operated as a sand and gravel mine, the Maury Island Natural Area is now a 275-acre park. The park contains pure Madrone forests and habitat that supports endangered species, such as Chinook salmon, orca and bull trout. The site’s nearly one mile of shoreline is the longest undeveloped stretch of Puget Sound shoreline in King County. When combined with the nearby 320-acre Maury Island Marine Park, the two parks represent the largest public holding of protected marine shoreline in all of Puget Sound.

Citizen activists and environmental groups fought plans for mine expansion and advocated for public acquisition of the site, which was purchased in December 2010. Acquisition funding came from the King County Conservation Futures Tax, Washington State Department of Ecology ASARCO Settlement fund and an amendment to CalPortland’s existing royalty agreement for another mining site. In addition, community groups including Forterra, People For Puget Sound, Preserve Our Islands, Vashon-Maury Island Land Trust, and Washington Environmental Council began a fundraising campaign to help ensure the site would be protected and cared for in perpetuity.

Due to previous mining activity and the site's location within the historic Tacoma Smelter plume, plans for land reclamation and soil remediation have been an integral part of site management planning. King County Parks has been working with a planning advisory group, which helped identify appropriate site uses and amenities, such as trail improvements, water access, restroom facilities, picnic areas and parking. We will finalize those recommendations as part of the planning process and in coordination with the Washington Department of Ecology.

For more information about the acquisition, read the press release from 2010.

Access: The park can be reached from Seattle by the Fauntleroy-Vashon ferry and from Tacoma by the Point Defiance-Tahlequah ferry. Once on Maury Island, head south on Dockton Road SW, east on SW 260th St. There is no formal access or parking on site, but non-motorized access is allowed via the gated maintenance road.