In Progress Environment Public Works District 2

Stormwater Quality Upgrades

New green infrastructure and drainage upgrades will reduce localized flooding and filter runoff before it reaches Mill Creek.

Stormwater Quality Upgrades project area and community engagement concept.
Project notice: In Progress The project will complete wetland permitting and begin early utility relocation at the first treatment site.
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Project overview

New green infrastructure and drainage upgrades will reduce localized flooding and filter runoff before it reaches Mill Creek.

What this project delivers

  • Three regional water-quality treatment facilities.
  • Rain gardens and permeable areas on public streets.
  • Larger culverts and real-time water-level monitoring.

Community involvement

Property owners, watershed groups, and industrial businesses receive design briefings and construction coordination updates for each work area.

People asked for clear milestones, predictable access, and regular updates they can understand at a glance.

Community engagement summary

What happens next

The project will complete wetland permitting and begin early utility relocation at the first treatment site.

Project team

Stormwater Utilities leads the work with Procurement, Communications, operations staff, and community partners.

Project timeline

Updated July 17, 2026

  1. Discovery and scope

    January 6, 2025 – November 5, 2025

    Discovery and scope for Stormwater Quality Upgrades, including documented decisions and public updates.

  2. Community review

    November 5, 2025 – September 3, 2026

    Community review for Stormwater Quality Upgrades, including documented decisions and public updates.

    Current phase · 96% complete
  3. Design and approvals

    September 3, 2026 – July 3, 2027

    Design and approvals for Stormwater Quality Upgrades, including documented decisions and public updates.

  4. Delivery and closeout

    July 3, 2027 – April 30, 2028

    Delivery and closeout for Stormwater Quality Upgrades, including documented decisions and public updates.

Latest updates

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