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Aecon-FlatironDragados JV enters $691M (U.S.) contract

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Executive Summary
- The FlatironDragados-Aecon Group Inc. joint venture has finalized a $691 million (U.S.) contract with the U.S. Army Corps of Engineers for the Howard A. Hanson Dam additional water storage and fish passage facility project in Washington State.
- Aecon holds a 40% equity stake in the joint venture, with its portion of the contract value scheduled to be added to its construction segment backlog in the first quarter of 2026.
- The project will be delivered under an integrated design and construction model, with construction expected to commence in Q2 2026 and reach completion in Q3 2031.
Key Details
- Contract Value: $691 million (U.S.)
- Joint Venture Structure: FlatironDragados-Aecon Group Inc. JV (Aecon: 40%, FlatironDragados: 60%)
- Client: U.S. Army Corps of Engineers
- Project Location: Washington State
- Project Scope: Construction of a downstream dam facility featuring vertically stacked ports on the dam's upstream side, designed to expand water storage capacity and provide salmon access to nearly half of the Green River habitat above the dam.
- Contract Model: Integrated design and construction
- Timeline: Collaborative development phase completion and construction commencement expected in Q2 2026; anticipated project completion in Q3 2031.
- Financial/Backlog Impact: Aecon's share of the contract will be added to its construction segment backlog in Q1 2026.
- Key Partners & Stakeholders: Tribal partners, federal and state agencies, and Tacoma Public Utilities.
Notable Quotes
- Jean-Louis Servranckx, President and CEO, Aecon: "This project is an exciting undertaking that leverages Aecon's extensive civil and dam infrastructure capabilities while advancing Aecon's steady growth across North America... we are well positioned to safely execute construction, working alongside our client, tribal partners, federal and state agencies, and Tacoma public utilities."
- Cdr. Col. Kathryn Sanborn, USACE Seattle District: "Howard A. Hanson dam serves as our primary line of defence against catastrophic flooding in the Green River Valley... This project significantly expands our water storage, ensuring a reliable supply for thousands of homes and supporting the future economic growth of the region, while also providing salmon access to nearly half of the Green River habitat above the dam."
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Jun 29, 2026 · 14:00