June 2025

Paving planned for sections of I-90 Trail between 84th Avenue Southeast and Southeast 35th Street

These sections of trail are expected to reopen by the end of June

As early as June 11, following the completion of pipe repair work, crews will begin preparing the I-90 Trail for paving and restoration activities. To safely complete this work, the trail will be closed between Island Crest Way and Shorewood Drive and between Fortuna Drive and S.E. 35th St on north Mercer Island.

Crews will begin grading the trail in sections before moving on to paving and restoration. This work is expected to last throughout the month. While the trail is closed, please follow the posted trail detour routes.

Detours

During this work, pedestrians will be detoured along a temporary gravel path on North Mercer Way and sidewalks on 84th Ave S.E. and S.E. 26th St. Cyclists will be detoured to merge with traffic along N. Mercer Way, 84th Ave S.E., and S.E. 26th St. Both cyclists and pedestrians will be able to rejoin the I-90 Trail in areas where it remains open. See the map below for more details. Please follow all detour signs and travel slowly around the work area.

Please follow marked detours and signs. Drivers should use extreme caution while moving through this area.

Map of work areas with pedestrian and bike detours. Sections of the I-90 Trail will be closed for paving between Island Crest Way and Shorewood Drive and between Fortuna Drive and S.E. 35th St on north Mercer Island. The section of the trail between S.E. 35th St and S.E. 35th Pl will remain closed. Please follow marked detours and travel slowly around the work area.

Trail Reopening

These sections of the trail are expected to reopen by the end of June. We appreciate everyone’s patience during this critical sewer upgrade project. Crews are working hard to finish construction along this section of the I-90 Trail so that it can be fully reopened to the community.

Pipe Testing

After paving and restoration is complete and these sections of the trail reopen, crews will begin pipe testing to ensure the conveyance system is operating as planned. This testing will confirm that the system is safe, reliable, and ready to provide dependable sewer service for your community.

What to expect during construction:

• Approved work hours are 7 a.m. to 7 p.m. Monday to Saturday.
• Speed limits on North Mercer Way will reduce to 20 mph near the work area.
• All work will be performed in the public right-of-way.
• Noise, dust, and vibrations typical of an active construction project.
• Emergency vehicle access will be maintained.
• Garbage, recycling, composting, and mail service will be maintained.
  • If services are interrupted, please call the project hotline at 425-305-3578.
• Construction schedules can change based on factors such as site conditions, weather, and material availability. Please visit the project website for updates.

Learn more about this project

• Contact the community services team at 425-305-3578 or email NMEsewer@kingcounty.gov
• Visit the project website: kingcounty.gov/MercerEnataiSewer.
• Alternative Formats Available: 206-477-5371 or TTY Relay: 711  

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