Cone Zone
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Updated 12/5/2025
PSE Gas Main Replacement
🕤 December 8-13, 2025 9:30am-3:00pm. In addition to weekdays, expect work to occur on some Saturdays as well.
🚦 Traffic Impacts: Traffic control will be done by a uniformed police officer. Expect minor delays.
📍 Work Location: NE 12th Pl and 228th NE
👷♂️ PSE will be installing new gas main.
Louis Thompson Intersection Paving & Detour Limits
🕤 Detour limits change October 30:
🚦 Beginning October 30, the one-way detour on Louis Thompson Road will be shortened to include only the segment between 208th Avenue NE and East Main Street.
📍Local access:
- Residents traveling as far up the hill as 208th Avenue NE will be able to drive downhill during this modified detour through November 21.
- Residential locations uphill from East Main Street can be accessed coming down the hill.
👷♂️ 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
Watermain Installation
🕤 Through December 2025
🚦 Traffic Impacts: Traffic control is being used and some minor delays are expected.
📍 Work Location: NE 36th & NE 37th off Sahalee Way
👷♂️ Northwest Sammamish Water & Sewer will be installing a new water main.