Cone Zone
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Updated 12/19/2025
PSE Gas Main Replacement
🕤 December 22-23, 2025 9:30am-3:00pm.
🚦Traffic Impacts: Traffic control will be present. Expect minor delays.
📍 Work Location: Between NE 12th Pl and NE 14th Pl
👷♂️ PSE will be installing new gas main.
Watermain Installation
🕤 January 5, 2025 7:00am-3:00pm
🚦Traffic Impacts: Two-way traffic will be in place with minor delays.
📍 Work Location: Sahalee Way between NE 36th and 37th 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
Loree Estates Outfall Division
🕤January 8, 2025, 9am – 12pm
🚦Traffic Impacts: Flaggers on site and the road will be reduced to 1 lane.
📍 Work Location: SE 19th St & 200th St SE
👷♂️ Potholing for water line depth verification.