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Project documents
Stay informed on the latest project news and updates and view previous project updates.
Please see the Public engagement page for a list of community meetings and meeting materials (agendas, presentations, summaries, etc.).
Project updates are posted on the home page.
Visit Software Help if you have trouble viewing or downloading documents.
Fact sheets
- The Plan for Trees, March 2021
- Project overview, May 2019
- What is microtunneling? August 2018
- Planning ahead for construction on the Sammamish River Trail, May 2017
- Planning ahead for traffic changes during construction, May 2017
- How we build, April 2017
- How we design, April 2017
Environmental documents
Preliminary Tree Protection Plan, March 2019
This document is currently being updated as the project design progresses. We cannot guarantee that trees shown for protection in this plan will not need to be removed in construction.
SEPA environmental checklist, issued August 15, 2018
Learn more about environmental review by viewing the August 2018 project update.