Trump administration lifts work stoppage on Great Lakes invasive carp barrier
Built World Grand Rapids, MI localBillion-dollar Brandon Road project resumes after Whitmer's call, with juvenile carp 80 miles from Lake Michigan
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Overview
Updated 35 minutes agoWork is resuming on the $1.15 billion Brandon Road barrier after President Donald Trump lifted a stop-work order on September 3. The reversal followed a direct phone call from Michigan Governor Gretchen Whitmer, who warned that juvenile silver carp had been found 80 miles from Lake Michigan.
The project layers electric current, underwater sound and air bubbles at a lock southwest of Chicago, the pinch point the carp must pass to reach the Great Lakes. The fish have advanced up the Illinois River for decades, and each delay narrows the margin. Once they establish in the lakes, experts say, there is no getting them out.
Why it matters
If invasive carp reach Lake Michigan, they could disrupt the $5.1 billion Great Lakes fishery permanently.
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People Involved
Organizations Involved
The federal agency responsible for constructing the barrier in partnership with Michigan and Illinois.
State agency whose monitoring crews track the carp's advance up the Illinois River.
Nonprofit that works to protect and restore the Great Lakes.
Timeline
January 2024 September 2026
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Stop-work order lifted
Latest ResumptionWhite House lifts the order; construction is set to resume at the Joliet site.
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Pritzker letter, Whitmer call
AppealPritzker demands resumption in a letter; Whitmer calls Trump directly.
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Juvenile carp found 80 miles from Lake Michigan
DetectionIllinois DNR collects small silver carp in the Illinois River, closest ever recorded.
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Second work stoppage
HaltArmy Corps stops work again; Illinois learns from a contractor, not federal officials.
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Work resumes, district shifted
ResumptionConstruction restarts; authority moves from Rock Island to Detroit District.
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First work stoppage
HaltArmy Corps halts work for an administrative review.
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Trump signs carp barrier memorandum
PolicyTrump orders his administration to expedite mechanisms and barriers to keep carp out of the Great Lakes.
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Construction begins
Project StartWork starts at the Brandon Road Lock and Dam near Joliet, Illinois.
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Funding agreement reached
AgreementMichigan, Illinois and the Army Corps agree to split the cost of the Brandon Road barrier.
Historical Context
3 moments from history that rhyme with this story — and how they unfolded.
Chicago canal electric barrier (2002)
The Army Corps built an electric fish barrier on the Chicago Sanitary and Ship Canal, the first attempt to keep Asian carp from passing from the Mississippi River basin into Lake Michigan.
The barrier slowed but did not stop the carp, which continued advancing up the Illinois River.
It showed a single point of defense can be overwhelmed, prompting the need for the layered Brandon Road system.
Brandon Road is the next, more comprehensive line of defense against the same advance.
Sea lamprey invasion (1930s-1950s)
Sea lamprey, a parasitic, eel-like fish, reached the upper Great Lakes through the Welland Canal. By the 1950s they had devastated lake trout and other large predators, collapsing commercial harvests across Lakes Huron and Michigan.
The Great Lakes Fishery Commission began a permanent chemical and barrier control program that still runs today.
The lamprey was never eliminated, only controlled, setting the precedent that an established invasive species cannot be removed.
The carp threat is the same: once established in Lake Michigan, experts say the fish are there permanently.
Zebra mussel invasion (late 1980s)
Zebra mussels arrived in Great Lakes ballast water around 1988, spread to all five lakes, and clogged water intake pipes while outcompeting native species for plankton.
They altered the food web across the entire system and now require constant upkeep at water facilities.
No removal was ever possible; the mussels remain a permanent part of the ecosystem.
Advocates cite the mussels when warning that a carp breakthrough cannot be undone.
