Great Lakes Carp Barrier Contract Awarded After Political Dispute

U.S. Army Corps of Engineers selects contractor for Illinois lock and dam project to block invasive fish.

Apr. 14, 2026 at 6:24pm

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An abstract painting featuring sweeping geometric shapes and botanical patterns in shades of blue, green, and gray, conceptually representing the intricate hydrological and ecological forces at play in the Great Lakes basin.A complex network of physical barriers and deterrents aims to prevent the spread of invasive carp into the delicate Great Lakes ecosystem.Today in Detroit

The U.S. Army Corps of Engineers has awarded a major construction contract for the rebuild of an Illinois lock and dam complex, a critical project aimed at preventing invasive carp species from reaching the Great Lakes. The contract award comes after a political spat over the project's funding and timeline.

Why it matters

Preventing the spread of invasive carp into the Great Lakes is a top priority for environmental groups and state officials who fear the voracious fish could devastate the region's $7 billion fishing industry. This project represents a key step in the long-running effort to install physical barriers to stop the carp's northward migration.

The details

The Army Corps awarded the contract to an undisclosed construction firm to rebuild the Brandon Road Lock and Dam near Joliet, Illinois. The complex is considered a chokepoint for keeping invasive carp, which have steadily advanced up the Mississippi River watershed, from entering the Great Lakes. The project will involve installing new technologies like underwater acoustic fish deterrents and an electric barrier to block the carp.

  • The contract was awarded on April 14, 2026.
  • Construction on the Brandon Road project is expected to begin later this year.

The players

U.S. Army Corps of Engineers

The federal agency responsible for overseeing the Brandon Road Lock and Dam project and awarding the construction contract.

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What they’re saying

“This project is critical to protecting the Great Lakes from the threat of invasive carp, which could devastate the region's fishing industry and ecosystems.”

— Gretchen Whitmer, Governor of Michigan

What’s next

The Army Corps says construction on the Brandon Road project is expected to begin later this year, with an estimated completion date in 2028.

The takeaway

The awarding of this contract represents a significant milestone in the long-running effort to install physical barriers to stop the northward migration of invasive carp into the Great Lakes, a move that is widely seen as essential to protecting the region's vital fishing industry and natural ecosystems.