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Columbia Slough Outfall 58 Stormwater Project

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Environmental Services is has completed constructing a stormwater management project in the northern portion of the Kenton neighborhood. This project is part of a larger effort to improve water and sediment quality in the Columbia Slough.
Construction was completed in early September 2024.
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Background

When it rains, stormwater may pick up and carry pollutants from the street – metals (such as copper and lead), oil, and dirt – into the storm drains.  The polluted stormwater then travels through underground pipes and discharges through outfalls to the Columbia Slough. This is one of several Columbia Slough Stormwater Projects with the goal to remove pollutants from stormwater before it enters the slough. 

To remove pollutants, engineers designed an underground stormwater management system that includes a sedimentation maintenance hole and a filter vault. The system is designed to filter stormwater and reduce the amount of pollution entering underground pipes and reaching the slough. These improvements will protect water quality, the community, and the health of the Columbia Slough watershed.

Project Area

The project area is north of North Columbia Boulevard and just west of North Hurst Avenue.

Columbia Slough Outfall 58 Improvement Locations

We Want to Hear from You

Environmental Services will inform residents and businesses about project activities and respond to questions and concerns in a timely manner. We encourage you to:

  • Visit this project webpage regularly for updates. 
  • With questions or comments, please contact Matt Gough by email or phone 503-823-5352.
  • If you have a question or concern, please be sure to include your name, property address, and project name (Outfall 58) in your voicemail and email so we can provide you more details about what to expect in front of your property.
  • If your basement sewer backs up or your property or street floods, please report it immediately to the City’s Maintenance Operations hotline at 503-823-1700. It is staffed 24/7, all hours and all days.

Sign Up for Updates

Sign up for periodic email or text message updates through our free GovDelivery subscription service. These updates are the best way to stay informed about what’s happening and what to expect. You can also sign up for bulletins on other projects and topics.

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This project will help protect the health of the Columbia Slough Watershed

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