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Road construction graphic with several orange and white road construction cones on a street. Notice says: The Cone Zone - Scheduled Road Work Projects to Know About

Cone Zone

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

Week of May 27 - June 2

228th Avenue Overlay 

Construction Duration: March 2023 – June 2023 

The project is almost complete. Crews are finishing up work on pavement markings, and vehicle detection at signalized intersections. 

** All construction is weather dependent, and the construction contractor will monitor the situation in the event weather impacts delay progress. **

For more information please visit 

New Sewer Line on East Lake Sammamish Parkway

May 1st through August 15th.

The Sammamish Plateau water/sewer district will be installing a new sewer line on East Lake Sammamish Parkway in the southbound lane from SE 33rd heading north to the 2100 block of East Lake Sammamish Place. New 25 mph enforceable speed limit signs will be installed in the work zone each direction to slow commuters down. Traffic control will also be present as one lane will be closed most of the project during work hours Mon.- Fri. between 9:00am – 3:30pm. Message boards have been placed on the parkway stating this info since Tuesday, April 25. Delays should be expected.

East Lake Sammamish Trail South Segment B Stage 2 Construction

This is a King County Trail Project 

The King County East Lake Sammamish Trail (ELST) South Segment B Phase 2 began construction in Spring 2022. All private property owners adjacent to the trail will be able to access their property during construction with limited exceptions for safety reasons. For example, access may be limited, or neighbors may experience short delays during major material unloading or wall construction along a lane. King County plans to incorporate flaggers/spotters on site on site to help pedestrians safely access their properties during daytime.

  • Project Start Point: Approximately 1,350’ south of the intersection of SE 8thStreet / East Lake Sammamish Parkway SE (STA 371+59)
  • Project End Point: Approximately 750’ south of the intersection of NE 16thStreet / East Lake Sammamish Parkway SE (STA 468+00)

The last uncompleted ELST section, the 1.9-miles from Pine Lake Creek to Inglewood Hill Road, will be closed for construction beginning in early June 2022 until December 2023.

For additional project information, please visit the project website: You may also contact the project team directly by email at or by calling the project hotline at 1-888-668-4886.

East Lake Sammamish Trail South Segment B Stage 1 Construction

The King County East Lake Sammamish Trail (ELST) South Segment B Phase 1 continues with construction. There will be traffic impacts related to the closure of the gravel surface trail segment which causes the re-routing of cyclists and pedestrians to East Lake Sammamish Parkway (ELSP). Additionally, there will be construction traffic on ELSP.

  • Project Start Point: Intersection of SE 33rd/ East Lake Sammamish Shore Lane Drive SE
  • Project End Point: Approximately 900' south of the intersection of SE 8thStreet / East Lake Sammamish Parkway SE

Notices for construction activity outside of the City of Sammamish:

Road maintenance on 244th Ave NE near Redmond Fall City Rd, (SR-202)

This is a King County Local Services project.

Due to a slide occurring in winter 2020, both lanes of 244th Ave NE are narrowed until the impacted support wall can be repaired. The repair of the support wall is expected to begin in Summer 2024. Soil samples yielded unexpected data, which caused the design phase to be extended. King County Road Services Division has a 24/7 Road Helpline - (206) 477-8100. More information on this project can be found, linked here.

Downtown Redmond Link Extension (DRLE) - Sound Transit work

This is a City of Redmond and Sound Transit project.

CONSTRUCTION ALERT: 10pm 6/2 - 5am 6/4

Weekend closure of off-ramp from eastbound SR 520 to Redmond Way/SR 202
Beginning the evening of Friday, June 2, crews will be closing the off-ramp from eastbound State Route 520 to Redmond Way/State Route 202 for construction. This closure will be in place from 10 p.m. on Friday, June 2, to 5 a.m. on Monday, June 4. See the maps on the DRLE tab for detours.

To stay up-to-date and learn more about this project, please visit the DRLE tab.