Cone Zone 8/29/25: Sammamish Traffic Updates
Release Date: 8/29/25
Louis Thompson Road
🕤 Beginning September 8, 2025 – October 31, 2025
🚦 Traffic Impacts: Traffic will switch back to one-way up the hill. The detour helps keep drivers and residents safe while work is underway.
📍 Work Location: Louis Thompson Road
👷♂️ Crews will be installing curb, gutter, driveway approaches, retaining walls, and road widening. Final paving is scheduled to be completed by end of October, after which two-way traffic will return. School buses, mail delivery, and garbage pickup will continue as usual.
Asphalt Patch Work
🕤 August 25-Sept 5, 2025, 7:00am – 4:00pm
🚦 Traffic Impacts: Traffic control will be used with minor delays.
📍 Work Locations:
📌 224th Pl NE between NE 16th St and NE 14th Drive
📌NE 14th Drive between 220th Pl NE and 225th Ave NE
📌NE 14th Drive between 225th Ave NE and 228th Ave NE
👷♂️ PSE crews will be doing asphalt patches. This work will be followed by grid and overlaying on some streets.
Watermain Installation
🕤 August 2025 – December 2025
🚦 Traffic Impacts: Traffic control is being used and some minor delays are expected.
📍 Work Location: Sahalee Drive East
👷♂️ Northwest Sammamish Water & Sewer