The $1.15 Billion Carp Barrier Got Paused Twice. Then Washington Tried to Cut Illinois Out.

Silver and bighead carp have already taken over long stretches of the Illinois and Mississippi rivers, outcompeting native fish for food.▸ The only thing standing between them and Lake Michigan is a lock and dam outside Joliet, Illinois, where the Army Corps of Engineers is building a wall of sound, bubbles, and electricity called the Brandon Road Interbasin Project. It is a $1.15 billion project with a funding formula everyone signed. Since last February, the federal government has paused it twice — and in April, tried to solve the second pause by cutting one of its two funding partners out of the project entirely.

Congress raised the federal share of Brandon Road's cost to 90% in the Water Resources Development Acts of 2022 and 2024, leaving Illinois and Michigan to split the remaining 10% as non-federal project sponsors.▸ Illinois put up approximately $50 million, already spent on design and early construction, plus land acquisition — some of which carries legacy coal-ash contamination the state will also have to remediate. Michigan pledged $64 million in December 2024, on top of an earlier $8 million it had already put toward planning and design, matching Illinois's commitment and unlocking $274 million in federal construction funds at the time.

Ninety cents of every dollar is federal.▸ That was the deal — and it's the deal both states kept.

The project has been under construction, on paper, since Illinois, Michigan, and the Army Corps signed a partnership agreement on July 1, 2024.▸ In practice it has spent as much time stopped as moving. In February 2025, Governor JB Pritzker put the project on hold himself, after the Trump administration withheld funds it had promised Illinois under the Bipartisan Infrastructure Law — he wasn't willing to keep spending state money against a federal commitment he couldn't trust. That pause lifted that spring after President Trump signed a memo backing the project. Then, last December, the administration ordered a fresh review that effectively paused it again.

In April 2026, the administration's answer to its own second pause wasn't to resume funding — it was to change who's in charge.▸ Assistant Secretary of the Army for Civil Works Adam Telle announced the Army Corps was moving management of Brandon Road from its Rock Island District to its Detroit District, accusing Illinois of being an "unreliable partner, delinquent on its payments and real estate commitments." Pritzker's response was direct: "Illinois has upheld our commitments. Trump must stop this political stunt and start releasing the funds, get the project moving again, and protect the Great Lakes." He added a warning that doubles as a property claim: "Illinois owns the land the Brandon Road Project will be built on — Trump cannot just decide to give it away." Michigan, for its part, said only that it would keep working the problem: Governor Whitmer's office said she'd "continue to work to get the job done so we can protect our lakes."

Construction has since resumed under the Detroit District.▸ A $113.8 million contract for the carp deterrents themselves went to J.F. Brennan Company on April 11; a design contract worth up to $85 million went to a Black & Veatch–Stantec joint venture twelve days later; and the FY2026 Civil Works work plan set aside $28 million to start the flushing lock. Add the $15.5 million site-prep contract from November 2024, and $242.3 million of the $1.15 billion project has a contractor's name on it — about 21%, four and a half years after planning began.

The Great Lakes Fishery Commission — the binational body Canada and the U.S. jointly created to manage the lakes' fish stocks — puts the commercial, recreational, and tribal fisheries it oversees at more than $5.1 billion a year in value and more than 75,000 jobs supported.▸ That figure covers fishing alone; it doesn't include the boating and tourism economy layered on top, which Michigan's own Department of Environment, Great Lakes, and Energy separately estimates at $20 billion for the fishing and boating industries combined, supporting "tens of thousands of good-paying jobs." Different scopes, different sources — but both point the same direction: a one-time $1.15 billion barrier stands between the carp and an industry that generates several times that much every single year.

Dollar figures for contracts and the cost-share split are as reported by The Waterways Journal as of May 29, 2026; the project's total cost is an estimate that has been revised over time as design work has progressed. The Great Lakes Fishery Commission's $5.1 billion/75,000-job figure and Michigan's $20 billion fishing-and-boating figure measure different, overlapping scopes and are not additive.