SR 530 Slide Memorial

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SR 530 Slide Memorial

Snohomish County Parks, Recreation and Tourism is working with families of victims, survivors and responders of the March 22, 2014, SR 530 Slide to build a permanent memorial at the site of the tragic event to honor those who were lost, those who survived, the responders and the resilience of the surrounding communities. In support of the families and survivors, a website has been dedicated to the project. Visit for additional updates and fundraising information.

To develop the conceptual design for the memorial, Parks worked with the interpretive team at MIG/Portico to organize feedback from families, survivors and responders into a cohesive design proposal. The design is based on the idea that visitors to an educationally and emotionally intense place will move through predictable stages of Arrival, Decompression, Reception, Orientation, Interpretation and Transition/Transformation (ANDROIT).

After seeking feedback from families, responders, community members and the Oso Slide Memorial Committee, Parks has further developed the conceptual design into site, grading, drainage and planting plans in preparation for construction permit submittals. Parks and the Committee would like to thank the firms of Perteet, Inc., Reid Middleton, Minaker Architecture and Northwest Hydraulic Consultants for their generous professional services donations that have helped move the design from concept to a constructible design.


  • Memorial Spruce Removal and Storage - Completed
  • Staff is preparing 100% design for permitting and construction documents. This effort includes coordination with Perteet, Minaker Architecture and Reid Middleton, which are donating design services.
  • Staff is coordinating with Snohomish County Planning and Development Services (PDS) prior to permit submittal.
  • Gateways at the two ends of the Slide Memorial were raised by the Timber Framers Guild in October 2020 and Parks staff installed the roofing and assisted a team of volunteers in installation of gabion walls under the structures.
  • Staff is coordinating with our non-profit partner, Hope Unlimited to complete transfer of WSDOT trees fall/winter 2021.
  • The memorial flagpole has been re-raised with a new base structure and treatment of the pole, and a solar lighting system to provide long-term lighting of the flag has been installed in 2021.
  • Grant funding from Washington State Commerce, in the amount of $294,00 has been awarded to the project.
  • Grant applications to RCO were submitted in June 2020 and funding from these is anticipated in the amount of $500,000.
  • Park staff continue to coordinate with family representatives on fundraising efforts, including grant applications, future state budget requests and website updates.


We’d like to thank the volunteers and donors who have been involved and are making this work possible: 

  • Evolution Tree Service 
  • Ness Campbell Crane and Cory DeYoung 
  • Doug Wesson Contract Cutting 
  • Oso Fire Hall 
  • Arlington Drilling 
  • Wild Edge Woods and 
  • Outback Power 

We’d also like to thank Totem Steel, who we are purchasing the base structure and other materials from, and who has gone above and beyond to support his project, as well as Seattle City Light for allowing access to the area by their patrol road. 

All acquisitions, plans and site developments are subject to funding availability and subject to Snohomish County Executive and County Council approval.


Parks held six meetings with the families of victims, three meetings with survivors and two meetings with first responders and community responders. The following concept was derived from those meetings. Following a design charrette with families and survivors, a concept refinement has been developed by MIG/Portico, a local interpretive design consulting team who have added therapeutic design elements to the plan.

At this time, all design ideas are conceptual. Parks will continue meeting with families, survivors, responders and volunteers to further refine the design and develop content for the Memorial.

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Parks staff estimates the total cost of the SR 530 Slide Memorial to be about $5 million and has received donations to complete the design. Funding is needed to complete the construction of the memorial and installation of its components. Additional improvements include installing a low barrier along the Whitehorse Regional Trail to discourage trail users and memorial visitors from accessing the mudslide debris area. If enough money is raised for the project, additional funds will be placed in a long-term maintenance and operation endowment. Information about the fundraising plan can be found in the 2018 SR 530 Slide Memorial Fundraising Packet (PDF), although some of the details of the design have since been refined.

Donations for materials, services or funds can be accepted through the Snohomish County Parks Donation Fund. All proceeds collected for the SR 530 Slide Memorial will be 100 percent dedicated to the project. Please contact one of the staff members below for additional information about donations, or visit the project website.


Sharon Swan, Principal Planner
6705 Puget Park Drive
Snohomish, WA 98296
Email Sharon Swan
(425) 388-6616