SR 530 Slide Memorial

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.

Parks worked with a professional Interpretive Team at MIG/Portico to develop a conceptual design based on the feedback from our meetings with the families, survivors and responders. The design is based on the principals of ADROIT, or 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.

After seeking feedback from families, responders, community members and the Oso Slide Memorial Committee, Parks has been able to develop the conceptual design into a 30% civil design and site plan. 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 30% design site plan.

This page dedicated to project updates and documents, and will be updated regularly, as the design is developed.

Project Updates:

SR 530 Slide Memorial - Design and Interpretive phase in progress

East Flagpole Repair and Stabilization - Update 8/18/20

We will be starting work shortly to reset the flagpole at the Memorial Site. This work will be spread over several weeks with the first stage being cutting of the pole and lowering it to the ground in order to trim it to size and seal the wood for longer-term preservation.  This work will be occurring 8/22, so there will be a crane on site and the pole being temporarily lowered.  


After the pole has been treated, piles and a base structure will be installed, which will ultimately support the raised pole.  The timing of reraising is still being determined, but we will provide updates when it is scheduled.  Additionally, there will be the installation of a solar array to provide lighting for the flag. We expect the work to happen before the end of September. 


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. 

Memorial Spruce Removal and Storage - Completed

Other Memorial Elements on the Whitehorse Trail - Concept and Location development in progress.

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

Steelhead Drive Gate

Design Concept

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.

SR 530 Mudslide Memorial Design Plan

Project Funding

Parks staff estimates the total cost of the SR 530 Slide Memorial somewhere between $6-7 Million and has set aside seed money to begin the process of design. Funding is needed to complete the necessary studies, civil design and engineering of the site as well as 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. Parks is also working with a structural engineering team from Chudgar Engineering to preserve the First Responder flag pole and build a permanent foundation for it. If enough money is raised for the project, additional funds will be placed in a long-term Maintenance and Operation endowment. Details of the Fundraising Plan can be found in the SR 530 Slide Memorial Fundraising Packet (PDF).

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.

Project Contacts

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