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The original item was published from 4/29/2022 12:36:02 PM to 5/7/2022 12:00:06 AM.

News Flash

Neighborhoods: Sycamore

Posted on: April 29, 2022

[ARCHIVED] Notice: Non-Toxic Dye Test

The City will be conducting a dye test of the sewer and stormwater system within the Sycamore Neighborhood. The work will occur on May 6, and will last one day, starting at 8 a.m. 

Work involves opening manholes and catch basins in City streets and public utility easements, and introducing a special, non-toxic dye.

The City has noticed a large volume of water entering the sewer system in this area during large storm events. Recently, the City pinpointed the issue to a small stormwater system in the Sycamore neighborhood, using a smoke test. The next step is to insert a nontoxic dye into the storm system, and using a pipe camera in the sewer line, to determine what is occurring. Because of the storm systems proximity to Lewis Creek, there is a possibility that some of the dye will enter the stream. The dye is non-toxic and not harmful to fish or other aquatic species. It will dissipate within a few hours.

Please contact Matt Ellis, Senior Engineer, at 425-837-3410 or by email if you have questions or concerns. Thank you for your patience while we test and maintain our sewer systems in your neighborhood.

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