Cone Zone
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Updated 10/17/25
Stormwater Pipe CCTV Inspection
🕤 October 20-24, 2025
🚦 Traffic Impacts: Traffic disruptions will be minimal, with only occasional single-lane closures expected. Appropriate signage and traffic control measures will be in place.
📍 Work Locations: Varies. NE 28th Pl, 221ST Ave NE, & 223rd Ave NE
👷♂️ The project will involve pipe inspections using CCTV technology, along with cleaning and vactoring services as needed.
Louis Thompson Intersection Paving & Detour Limits
🕤 October 20-24, 2025
🚦 Traffic Impacts: Paving for side street approaches is scheduled. Most street access will remain while the approaches are paved one side at a time, but 208th and 210th Avenue NE are planned to have temporary closures/detours for the paving. Affected residents will receive a door hanger notice.
🕤 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
🕤 August 2025 – 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.
PSE Gas Main Replacement
🕤 October 6 – December 31, 2025, 7:00am – 4:00pm. In addition to weekdays, expect work to occur on some Saturdays as well.
🚦 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 and NE 12th Pl
👷♂️ PSE crews will be doing asphalt patches. This work will be followed by grid and overlaying on some streets.
Fiber Installation
🕤 October 6-24, 2025
🚦 Traffic Impacts: Traffic control will be present, and some minor delays are expected.
📍 Work Location: Inglewood Hill Road and 226th
👷♂️ Ziply crews will be installing new fiber.
King County Drainage Improvement Project
🕤 October 9-24, 2025, 8:30am-3pm, including weekends
🚦 Traffic Impacts: Work will mostly be off the road, but there may be occasional times the crew will use traffic control to direct two-way traffic through a single open lane.
📍 Work Location: Sahalee Way NE between NE 50th St and NE 37th Way
👷♂️ See King County project link: Find updates and details on the project website
Comcast Overhead Work
🕤 October 16-29, 2025, 9:30am-3:30pm
🚦 Traffic Impacts: Traffic control will be present.
📍 Work Locations:
📌 From 1605 E Lake Sammamish Pkwy to SE 8th St
📌SE 8th St from ELSP to 20018 SE 8th St