Marquam Nature Park Sewer and Stormwater Planning Project

Sewer and Stormwater
In Planning
The Bureau of Environmental Services is investigating conditions of the stormwater system in Marquam Park & Council Crest and exploring options for improvement and rehabilitation. This project will help ensure that stormwater and sewer systems in the area have adequate capacity in major storms.

Project Area

The project is located in Marquam Nature Park in SW and S Portland.

Showing pipe work to be done within Marquam Nature Park

What’s Happening Now

This project is in the planning phase. Through 2024, crews will be in the area to perform investigative activities. Activities include marking the location of sewer pipes and underground utilities with temporary paint, surveying the land, collecting soil samples, and taking CCTV footage of the pipes. We are evaluating Marquam Gulch as part of this process to develop a comprehensive solution to stormwater overflow issues. Environmental Services will provide a tentative construction schedule when one is available.

Construction Methods

Crews are currently determining the best method to complete the sewer pipe rehabilitation. Crews will need to determine the precise locations of other underground utilities before any digging can occur. Learn more about utility locates and what to expect during construction.

We Want to Hear From You

Environmental Services is working directly with adjacent properties affected by the lateral repair. We encourage you to: 

  • Visit this project webpage regularly for more details about the project and what to expect. 
  • In the event of a sewer backup or basement flooding, call the City’s Maintenance line immediately at 503-823-1700. The line is staffed all hours and all days (24/7). 

Sign Up for Updates

Sign up for periodic email or text message updates for this project 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. 


This project will help protect the health of the Willamette River Watershed.