Cone Zone
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Updated 4/11/25
Sahalee Way Corridor Geotechnical Borings
Geotechnical exploration for stormwater and retaining wall design related to the Sahalee Way Corridor project is scheduled for April 14 – 18. Drivers should expect delays along Sahalee Way/228th Avenue NE – NE 12th to NE 25th Way. Traffic flaggers will enact single lane closures or shoulder closures between 9:30 AM and 3:30 PM (message boards read “9am-4pm” due to character limitations).
Louis Thompson Tightline Project
Road closures will occur from 7 AM – 3:30 PM in the Tamarack Neighborhood to accommodate service connections to a new water main for the Louis Thompson Tightline Project.
April 15 single day road closure on 210th Avenue NE at intersection with Louis Thompson Road. There will be a detour for the day. Residents living along the closure have been notified by flyer.
April 16 – 18 road closure on East Main Street affecting 3 homes with access directly to Louis Thompson Road. Residents have been notified by flyer.
Stormwater Pipe Inspection
Crews will inspect and clean stormwater pipes along Issaquah Pine Road between 228th Avenue Southeast to Southeast 32nd Way April 9–April 11. Traffic disruptions will be minimal, with only occasional single-lane closures expected.
Ziply Fiber Restoration Work
The Ziply permits are currently suspended by the City of Sammamish. Ziply is still allowed to perform restoration work associated with previous construction activities. Restoration activities include soft surface replacement, asphalt patching, and sidewalk replacement.
City of Redmond Work
Road closure on 187th Avenue Northeast near Sammamish city limit
This is a City of Redmond development project.
A City of Redmond development project requires the temporary closure of 187th Avenue Northeast adjacent to Sammamish neighborhoods to accommodate work for The Cove short plat located in Redmond. Their contractor will close 187th Avenue Northeast between East Lake Sammamish Parkway Northeast and Northeast 53rd Street. A detour will be in place along East Lake Sammamish Parkway Northeast and Redmond-Fall City Road NE (SR 202) to manage traffic during this period. This closure may impact Sammamish local traffic, including NE 54th Place Northeast and NE 55th Street. The closure is tentatively scheduled to begin on Wednesday, Jan. 29, 2025, and is expected to last for approximately eight working days. Work hours will be from 7 a.m. to 4 p.m., Monday through Friday. For more information about this project, please visit the City of Redmond’s project webpage.
WSDOT Traffic Alerts
Traffic Alert: I-90 Lane Closures
Washington State Department of Transportation (WSDOT) crews are continuing repairs on the Interstate 90 project, which will have congestion impacts, especially during peak travel time. These are a continuation of repairs WSDOT began in summer 2022. While this work is occurring, please plan ahead and allow extra time.
State Route 18 Closures
People who use State Route 18 should expect slight traffic shifts during the daytime commute and intermittent nightly lane reductions. This may be as early as 8 p.m. Mondays through Thursdays, with all lanes reopening by 5 a.m. Flaggers will direct motorists when traffic is reduced to one lane. People should continue to plan extra time for their trips, as contractor crews work to widen the highway and redesign the interchange.
More information can be found here: https://wsdot.wa.gov/construction-planning/search-projects/i-90-sr-18-interchange-improvements