West Duwamish Wet Weather Storage
Seattle, Washington
ConstructionValue not verifiedLast reviewed: 2026-10-03
Sourced project intelligence. Blank fields are shown as “Not yet verified.” Estimates and schedules can change. Check official procurement notices for current deadlines and terms.
Project overview
- Infrastructure Sector
- Water & Wastewater
- Project Type
- Combined sewer overflow storage
- Location
- Seattle, Washington
- Project Owner / Agency / Developer
- King County Wastewater Treatment Division
- Project Description
- Underground wet-weather storage tank controlling the Terminal 115 and West Michigan combined sewer overflow outfalls; county identifies a 2026 construction start.
- Estimated Project Value
- Not yet verified
- Funding Source
- Not yet verified
Schedule & delivery
- Project Stage
- Construction
- Expected Procurement Date
- Not yet verified
- Construction Start
- Not yet verified
- Estimated Completion
- Not yet verified
- Delivery Method
- Not yet verified
- Major Scope / Components
- Underground wet-weather storage tank controlling the Terminal 115 and West Michigan combined sewer overflow outfalls; county identifies a 2026 construction start.
Project team
- Key Organizations Involved
- Not yet verified
- Prime Contractor / Construction Manager
- Not yet verified
- Engineering / Design Firm
- Not yet verified
- Technology / Equipment Providers
- Not yet verified
- Decision Makers / Project Contacts
- Not yet verified
Procurement & opportunities
- Current RFPs / RFQs / Bid Opportunities
- Not yet verified
- Upcoming RFPs / Procurement Opportunities
- Not yet verified
- Contract Value / Package Size
- Not yet verified
- Workforce Requirements
- Not yet verified
- Supplier / Subcontractor Opportunities
- Not yet verified
- Website / Procurement Portal
- Official project / procurement website ↗
Progress & intelligence
- Permitting / Regulatory Status
- Not yet verified
- Major Milestones
- Not yet verified
- Recent Project Updates
- Source review: 2026-10-03
Underground wet-weather storage tank controlling the Terminal 115 and West Michigan combined sewer overflow outfalls; county identifies a 2026 construction start. - Challenges / Risks
- Not yet verified
- Last Updated
- 2026-10-03
Owner: King County Wastewater Treatment Division
Location: Seattle, Washington
Sector: Water & Wastewater
Stage: Construction
Underground wet-weather storage tank controlling the Terminal 115 and West Michigan combined sewer overflow outfalls; county identifies a 2026 construction start.
Source reviewed October 3, 2026. Map pin represents the approximate city or region. Published targets may change.