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Sewer utility survey work to occur along the Sammamish River Trail, May 2-9


Sewer utility survey work is scheduled from May 2-9 on a portion of the Sammamish River Trail in Redmond. The work will support project planning for King County’s Lake Hills/Lake Sammamish Sewer Upgrade Project.


Sewer utility survey crews will be working along the Sammamish River Trail near King County’s Marymoor Park from May 2-9.


King County is conducting the work as part of the Lake Hills/Lake Sammamish Sewer Upgrade Project, which will entail replacing aging pipelines and adding new capacity to support population growth in the Redmond area.   


The work is not expected to impact pedestrians and cyclists, but trail users should be cautious when traveling through the area and watch for surveyors, traffic cones, signs and other safety equipment.


King County will notify the community with details about additional project work scheduled for later this spring, including geotechnical borings that are needed to assess soil and groundwater conditions along the planned pipeline alignment.  


The Lake Hills/Lake Sammamish Sewer Upgrade Project will entail replacing 21,000 feet of pipeline installed 45-60 years ago, to protect public health and water quality by ensuring reliable service. 


Construction is expected to begin in 2018. King County’s project team will be working closely with people who live, work and play in the area throughout the project. 


People can get project updates by texting KING REDMONDSEWER to 468-311. For more information, visit You may also contact Monica Van der Vieren in King County's Wastewater Treatment Division at 206-477-5502.