Seattle Public Utilities

Broadview Sewer & Drainage Improvements


We’ll be making sewer and drainage improvements in Broadview neighborhood.

What & Why

The Broadview neighborhood has longstanding sewer and drainage problems. During heavy rains, water can overwhelm Broadview’s sewer system and cause sewage backups into homes, which is a serious public health issue. Stormwater runoff can also flow from streets onto private property and cause damage. Broadview’s high water table, poor soils, steep bluff to the west, lack of drainage system, and aging sewer pipes all contribute to the complexity of these issues.

What’s happening now?

The Broadview Sewer and Drainage Improvement Program is currently planning and designing projects in the neighborhood. From 2011 to 2016, SPU evaluated potential options to reduce sewage backups and stormwater runoff in Broadview. After extensive evaluation and review that included hearing from the community, SPU selected two projects to address the highest priority sewer and drainage issues. Over the next several years, these two projects are slated to go through planning, design, and construction.

We have started preliminary design work on the 12th Ave NW Drainage Basin Project and are working to get approval to start design work on the Dayton Ave N Sewer Improvement Project.

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Next steps after initial projects are completed

SPU will evaluate results of the initial projects in the 12th and Dayton basins to decide future comprehensive sewer and drainage project needs in the Broadview area. These initial projects will provide data to support thoughtful and cost-effective design of future improvements, if needed. SPU will provide information on project approach and progress through regular updates to our website, email listserv, and briefings for community groups and councils.

Project goals and benefits

The goals of the Broadview program are to:

  1. Reduce sanitary sewer overflows into homes, streets, and creeks
  2. Reduce the frequency and quantity of stormwater flooding to areas most impacted, especially building structures.