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Updated 6/10/25

PSE Work

PSE crews will use a crane to relocate two transmission poles June 17 into the morning of June 18 from 7 p.m. – 1 a.m. on Issaquah Pine Lake Road Southeast near Southeast 48th Street. A section of roadway will need to be closed for this work. A detour will be in place.

 

Stormwater Pipe Inspection

Crews will inspect and clean stormwater pipes on East Lake Sammamish Parkway between Northeast 18th Place & Northeast 28th Place on June 9 –June 16. Traffic disruptions will be minimal, with only occasional single-lane closures expected.

https://cascade.org/rides-events/flying-wheels-summer-century-2025

Louis Thompson Tightline

Louis Thompson Road Tightline Project will have a temporary full road closure on Louis Thompson Road at 210th Avenue Northeast for through traffic on Tuesday, June 10 between 9 a.m. and 12 p.m. so that a crane can install a large water quality vault as part of the project. The contractor will have additional flaggers and revised message board for that day.

Local traffic will be able to access Louis Thompson Road to and from 212th Avenue SE, extending downhill as far as East Main Street. School bus routes will remain unchanged, and Republic Services plans to maintain regular trash collection that day. USPS mail delivery will also continue without interruption.

As part of the Tightline Project, crews will be installing storm drainage structures and pipe along Louis Thompson Road from May 12 – June 20. To keep everyone safe and ensure smooth progress, temporary traffic changes will be in place:

One-Way Traffic Only:

  • Louis Thompson Road will be open only to southbound (uphill) traffic only, 24 hours a day, throughout the construction period.
  • Closure to Northbound (downhill) Traffic: From SE 5th Street to East Lake Sammamish Parkway, Louis Thompson Road will be closed to northbound traffic.
  • Detour signs will be posted, and residents should use alternate routes to travel northbound.

Access and Services Maintained:

    • Southbound traffic will maintain access to all driveways and side streets.
    • Vehicles exiting neighborhoods must travel southbound (uphill).
    • In coordination with the Lake Washington School District, all school bus routes will continue to operate with uphill-only routing.
    • Garbage collection and mail delivery will continue without interruption.

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.

 

King County Roads Project

Joints in the metal culvert under the 4600 and 4800 blocks of Sahalee Way NE are failing and water is seeping into the ground, making the soil soft and increasing the danger of slides. Road Services will replace one pipe and rehabilitate another under the road between NE 50th Street and NE 37th Way. This work will require full closure of Sahalee Way NE for five days (June 28 to July 2). All traffic, including emergency vehicles, Metro buses, bicycles, and pedestrians, must use a detour route during the closure. Find updates and details on the project website

 

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