Seattle Public Utilities Mami Hara, General Manager/CEO

Broadview Sewer & Drainage Improvements


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

Get Involved

Community update – Q2 2016

Broadview Community Council briefing:

Community update – Q1 2016

Recent meetings and materials:

Community update – October 2015

This fall the project team will be completing the options analysis for the project alternatives and recommend an alternative for management approval. SPU is considering elements of the alternatives presented at the May 2015 open house (pdf) and the team is using community input to help select the recommended alternative package. We plan to share more information about the analysis, recommended alternatives and longer-term improvements in early 2016.

May 28 open house update

Please join us at an open house on Thursday, May 28 at Luther Memorial Church (13047 Greenwood Avenue North). You can drop in anytime between 6:30 p.m. to 8:00 p.m.

At the open house you will have an opportunity to:

  • Learn about a new regional sewer alternative being considered that would involve work in Broadview and the Greenwood/Crown Hill area.
  • Learn about a new 12th Avenue NW basin drainage alternative under evaluation.
  • Discuss the new options with project team members and next steps for selecting preferred alternatives.
  • Receive updates on project schedule and future public involvement opportunities.

Read the open house materials (pdf).

You can also learn about the new regional sewer alternative from the presentation (pdf) provided to community groups earlier this spring.

Community update – March 2015

Over the past few months, our technical team has been analyzing a potential new regional sewer alternative for the 12th Avenue basin (western Broadview) and Dayton Avenue basin (eastern and southern Broadview). Preliminary work on this regional sewer alternative includes policy-level discussions among agencies, developing preliminary cost estimates, and studies of feasibility. This work will help the team determine if this potential regional sewer alternative should be considered in Broadview.

In addition, our team has been studying a new drainage alternative for the 12th Avenue basin that would use the right-of-way for drainage improvements and reduce property acquisition needs. This alternative has been developed in response to requests from the community.

The project team has been scheduling briefings with community organizations in the Broadview, Crown Hill and Greenwood neighborhoods to discuss the potential new regional sewer alternative. On March 16, members of the project team met with the Crown Hill Neighbors Board, and plan to brief the Broadview and Greenwood neighborhood councils, the Northwest District Council, and other groups as needed.

The PowerPoint presentation for the community briefings is available for download below. More information will be available about these new potential alternatives at a project open house in late May or early June.

Community updates – September 2014

Dayton Ave N Basin

SPU is working to identify preferred sewer and drainage improvements for the Dayton Ave N basin in the spring of 2015. In late 2014 we will evaluate drainage alternatives for this portion of Broadview. We will then pair leading sewer and drainage alternatives for the basin. Throughout this project, we will engage the community and seek input on key project elements.

Project phasing

SPU will develop a funding plan for phased implementation of sewer and drainage improvements in both the 12th Ave NW and Dayton Ave N basins. Early cost estimates for both basins indicate that paired sewer and drainage improvements will cost considerably more than is currently available. Refer to the September 23 community meeting materials (link above) for more information on anticipated project costs and funding.

Geotechnical study and groundwater monitoring work in Dayton Ave N Basin

As part of the project, we installed groundwater monitoring equipment in locations throughout southern and eastern Broadview. This data will help SPU understand groundwater conditions as we plan for improvements to the sewer and drainage systems in the Dayton Ave N basin.

Community update – June 2014

SPU held a community meeting Wednesday, June 18 to present information and gather feedback from residents about leading alternatives to improve drainage in the 12th Avenue NW basin (western portion of Broadview), and to improve the function of the sewer system in the Dayton Avenue N basin (southern/eastern portions of Broadview).

For those who were unable to attend, meeting materials are available for download below.

Community update – March 2014

SPU held a public meeting on Tuesday, March 18 to present details about the leading 12th Avenue basin sewer alternatives. At the meeting, we also outlined upcoming project and public involvement opportunities throughout 2014 for this project, and shared recent study results including geotechnical study results and priority areas for drainage improvements.

In case you were unable to attend, meeting materials are available for download below.

Past meetings and materials


Grace Manzano, project manager
(206) 233-1534

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