Pipers Creek Natural Drainage System (NDS)

Rendering of street view of project
Pipers Creek project rendering

Project Description

Reducing flooding, improving creek water quality, and providing multiple community benefits.

More than 12 million pounds of pollution are carried into our water bodies through stormwater runoff each year. Stormwater that falls on the roofs, streets, and parking lots in your neighborhood can pick up harmful pollutants before it runs into Pipers Creek, which flows into Puget Sound. The pollutants can harm fish, wildlife, and our ecosystems.

The Pipers Creek Natural Drainage System Project will identify, design, and implement up to 7 blocks of natural drainage systems to treat an equivalent of 4-5 acres of polluting surfaces in the Broadview neighborhood to capture and treat stormwater before it drains into Pipers Creek and Puget Sound.

This project is part of SPU's Plan to Protect Seattle's Waterways and aims to:

  • Improve water quality and reduce pollution of stormwater flows into Pipers Creek and Puget Sound and help manage stormwater by constructing natural drainage systems in your neighborhood.
  • Provide community benefits, which include reduction of drainage issues in the street, traffic calming, and added landscaping.


The Pipers Creek Natural Drainage System Project is focused on improving water quality, reducing drainage issues, and reducing pollution in Pipers Creek by implementing several natural drainage systems within the Broadview and Blue Ridge neighborhoods.

View the Pipers Creek project map. 

What's Happening Now?

This project is currently in the early planning stages as we study locations to construct natural drainage systems in the Broadview and Blue Ridge neighborhoods.

Community Benefits

Natural drainage systems offer multiple benefits to local neighborhoods and ecosystems, including:

  • Increased landscape diversity
  • Lower risk of flooding
  • Healthier creek ecosystems
  • Traffic calming
  • More trees along the street

The project will also help the City of Seattle achieve its goal of managing 700 million gallons of stormwater runoff using green infrastructure by 2025.

Community Engagement

Community input will be essential to this project alongside technical evaluations in each project phase. The project team will work with neighbors and community members to understand important issues in the neighborhood and identify the feasible and appropriate locations for natural drainage systems. Community members will be able to share their input through a variety of online and in-person activities, and surveys.

If you are interested in learning more about the project and upcoming community engagement opportunities, please sign up to receive project email updates



  • Feasibility analysis through community input and technical evaluations

Early 2022

  • Concept development as we identify potential locations

Fall 2022

  • Develop 10% design concepts
  • Public meeting for community information and feedback

Early 2023

  • Refine locations and develop 30% design
  • Public meeting for community information and feedback

Sign up to receive project email updates when public input opportunities become available.