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24-hour intersection closure at 78th Ave S.E. and S.E. 24th St planned to begin March 5
Please follow detour signs and travel slowly around the work area
As early as March 5, the intersection at 78th Avenue Southeast and Southeast 24th Street will close to vehicle and bicycle traffic. The closure is expected to remain in place through early April, pending approval from the City of Mercer Island.
During the closure, vehicles and cyclists will detour on S.E. 22nd Pl and 80th Ave S.E. Pedestrian access will be maintained through the intersection during the closure. Cyclists can also choose to dismount and take the pedestrian route. Access to homes will be maintained.
This intersection closure is part of the ongoing pipe repair work. Testing the pipe ensures the newly installed conveyance system operates as planned. Pipe testing revealed an issue that needs to be repaired. Crews are repairing the pipe to make sure the system operates correctly and safely to ensure reliable sewer service for your community.
This work involves a construction method called open-cut trenching. During open-cut construction, crews sawcut the roadway’s surface, remove asphalt, and dig down to the pipe.
Please travel slowly through the area and follow all signs, traffic control signals, and directions from crews.
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 Map of work area and detours during construction at 78th Ave S.E. and S.E. 24th St.
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Plans for final restoration:
When repairs are complete, crews will backfill the roadway and temporarily restore the roadway surface where the pipe was installed. Then, crews will restore all disturbed areas based on permit conditions agreed upon with the City of Mercer Island. Final paving is weather dependent and will take place during the permitted paving window, which begins in the spring. We will send a notice with more details and update the project website once this is scheduled.
What to expect:
- Approved work hours are 7 a.m. to 7 p.m. Monday to Saturday.
- Detour signage will direct vehicle and bicycle traffic through the work areas.
- Pedestrian access will be maintained. Please follow the pedestrian routes and directions from crews.
- Noise, dust, and vibrations typical of an active construction project.
- Expect intermittent loud noise during jackhammering and saw cutting.
- Expect increased continuous noise while the vacuum truck is in use.
- 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
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