Cone Zone

Subscribe to the Cone Zone newsletter to get weekly updates on road work in Sammamish!

Updated 12/12/2025

PSE Gas Main Replacement

🕤 December 15, 2025  9:30am-3:00pm.

 🚦 Traffic Impacts: Traffic control will be done by a uniformed police officer.  Expect minor delays.

📍 Work Location: NE 12^th Pl and 228^th NE

👷‍♂️ PSE will be installing new gas main.

Watermain Installation

🕤 December 15-31, 2025   7:00am-3:00pm

 🚦 Traffic Impacts: Two-way traffic will be in place with minor delays.

📍 Work Location: Sahalee Way between NE 36^th and 37^th Way

👷‍♂️ Northwest Sammamish Water & Sewer will be installing a new water main. 

Louis Thompson Intersection Paving & Detour Limits

🕤 Through December, 2025

🚦Traffic Impacts: The one-way detour on Louis Thompson Road will be shortened to include only the segment between 208th Avenue NE and East Main Street.

👷‍♂️ This temporary traffic change is necessary to safely construct Walls 7 and 8 along the uphill lanes.  Please see the project page at this link, below, for ongoing updates: www.sammamish.us/projects/louis-thompson-tightline