Cone Zone

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Updated 1/17/25

Ziply Fiber Installation

Ziply Fiber is installing underground high-speed fiber internet lines in select neighborhoods in Sammamish. Ziply will be reaching out to those affected neighborhoods with installation plans and schedules before they start construction. Expect minor traffic delays between 8 a.m. and 4 p.m. along local roads during installation.

Here is a map provided by Ziply of completed, active, and upcoming work.

Louis Thompson Road

Starting Tuesday, Jan. 21, the contractor will begin clearing vegetation and roots from uphill slopes above the existing drainage ditches on Louis Thompson Road. Selected and marked trees will also be removed, while others will have limbs removed in preparation for the stormdrain installation.

Location: Louis Thompson Road, between 210th Place Southeast to East Lake Sammamish Parkway

Dates: Jan. 21 - 31

More info: https://www.sammamish.us/projects/louis-thompson-tightline/

City of Redmond Work

Road closure on 187th Avenue Northeast near Sammamish city limit

This is a City of Redmond development project.

A City of Redmond development project requires the temporary closure of 187th Avenue Northeast adjacent to Sammamish neighborhoods to accommodate work for The Cove short plat located in Redmond. Their contractor will close 187th Avenue Northeast between East Lake Sammamish Parkway Northeast and NE 53rd Street. A detour will be in place along East Lake Sammamish Parkway Northeast and Redmond-Fall City Road NE (SR 202) to manage traffic during this period. This closure may impact Sammamish local traffic, including NE 54th Place Northeast and NE 55th Street. The closure is tentatively scheduled to begin on Wednesday, Jan. 29, 2025, and is expected to last for approximately eight working days. Work hours will be from 7 a.m. to 4 p.m., Monday through Friday. For more information about this project, please visit the City of Redmond’s project webpage.

WSDOT Traffic Alerts

Traffic Alert: I-90 Lane Closures

Washington State Department of Transportation (WSDOT) crews are continuing repairs on the Interstate 90 project, which will have congestion impacts, especially during peak travel time. These are a continuation of repairs WSDOT began in summer 2022. While this work is occurring, please plan ahead and allow extra time.

State Route 18 Closures

People who use State Route 18 should expect slight traffic shifts during the daytime commute and intermittent nightly lane reductions. This may be as early as 8 p.m. Mondays through Thursdays, with all lanes reopening by 5 a.m. Flaggers will direct motorists when traffic is reduced to one lane. People should continue to plan extra time for their trips, as contractor crews work to widen the highway and redesign the interchange.

More information can be found here: https://wsdot.wa.gov/construction-planning/search-projects/i-90-sr-18-interchange-improvements