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Sammamish Town Center (not licensed)

Cone Zone 6/13/25: Sammamish Traffic Updates

Release Date: June 13, 2025

Stormwater Pipe Inspection

Crews will inspect and clean stormwater pipes on Southeast 30th Street from 244th Avenue Southeast to 249th Avenue Southeast and Southeast 40th Street from 229th Avenue Southeast to 234th Avenue Southeast, Work will be done June 23-June 27. Traffic disruptions will be minimal, with only occasional single-lane closures expected.

PSE Work

PSE will relocate a pole, closing a road June 17–June 18 from 9 p.m. to 3 a.m. A single lane closure will begin at 3 a.m. and end at 12 p.m. June 18. The closure is on Issaquah Pine Lake Road Southeast between Southeast 48th Street and Southeast Issaquah-Fall City Road.

Louis Thompson Tightline

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