The order came from the bench, which is not how these usually arrive. At the end of a hearing in El Paso on Friday, U.S. District Judge Kathleen Cardone asked the courtroom to stay calm and read the injunction aloud herself. It bars the government from building border barrier or related infrastructure, and from any construction or ground-disturbing work, across the Big Bend Sector of the Texas border while a lawsuit over the project continues. The plaintiffs asked for the pause in April. They got it five months later, two days after the administrative cover for the project expired.
What makes the ruling worth reading closely is the theory it accepted. Since construction began this summer, the government has defended the Big Bend project with a statutory waiver that sets aside the environmental laws Congress wrote for exactly this terrain: the Endangered Species Act, the National Environmental Policy Act, the National Park Service Organic Act and the Wild and Scenic Rivers Act, among others. A waiver of that kind is designed to keep courts out of the way. Cardone found the plaintiffs likely to succeed on claims the waiver was not built to reach, and those claims are constitutional.
A pause that ran out on September 30
The project has been contested since January, when word of the government's plans for the Big Bend region became public. The region is unusual ground for a barrier. The Big Bend Sector runs 517 miles, more than a quarter of the southern border, and the Center for Biological Diversity says it recorded no unauthorized vehicle crossings there and 1.3 percent of the country's border apprehensions in 2025. Within the park itself, the group puts the share of national apprehensions at 0.045 percent.
Bulldozers entered the park in early August near Santa Elena Canyon, and crews were documented cutting routes into Mariscal Mountain, according to the group. On August 17, Customs and Border Protection announced a pause. The agency's commissioner, Rodney Scott, had framed the project as a way to protect the park from future cartel activity, and the agency described the halt as a response to local objections rather than a change of position. The pause lapsed on September 30. By then the administration had erected its first wall panels in the sector, and work could have resumed at any time.
The suit was filed in April against the Department of Homeland Security and its secretary by the Center for Biological Diversity, on behalf of the Friends of the Ruidosa Church, a nonprofit organized to preserve a historic church in Presidio County, and Danny William Miller, a river guide and landowner in Redford whose property sits in the path of the barrier. The complaint challenges five contracted projects as unconstitutional, arguing that the department used powers Congress never gave it, that it waived dozens of statutes it had no authority to waive, and that the construction would deprive citizens of their land. Attorneys from the Center for Biological Diversity and the Texas Civil Rights Project represent the plaintiffs.
What the waiver took off the table
The authority the government has relied on is old and broad. A provision of the Illegal Immigration Reform and Immigrant Responsibility Act of 1996 lets the Secretary of Homeland Security waive all legal requirements the Secretary decides are necessary to ensure expeditious construction of barriers and roads along the border. Secretaries in both parties have used it, and courts have generally treated the resulting decisions as committed to the executive and outside judicial review. When the current secretary, Kristi Noem, issued waivers covering the southwest border, she wrote that the department had delivered the most secure border in history and that more could be done, and the waivers also eased contracting rules for the work.
That structure is why the Big Bend litigation is not, at bottom, an environmental case. If the statutes that normally require impact statements and species consultation have been waived, a claim that says those statutes were violated goes nowhere. The plaintiffs' answer is that the waiver cannot dissolve the Constitution, and that the arrangement it produced violates the separation of powers by letting an agency decide for itself which laws apply to it. The environmental claims remain in the complaint as a fallback, but the theory that persuaded the court on Friday was about who gets to make the decision.
The property claim has a name and a river
The half of the constitutional case that is easiest to see belongs to Miller. His land sits between the barrier's planned route and the Rio Grande, in a stretch where a fence, a road and the lighting that comes with them would sit between a working river guide and the river that his business depends on. The complaint describes a taking: land and access taken for a federal project, with no compensation process the owners can use while the waiver is in place.
At the hearing, Miller testified that building the wall across his property and cutting off his access to the river would be, in his words, like a bullet to the head, and he said that once the desert is altered it cannot be replaced. Another witness, a Hudspeth County rancher, told the court that a barrier would end his operation. Testimony of that kind does not by itself decide a constitutional question. It does give the court a concrete injury to weigh, which is what separates a takings claim from a general objection to federal policy, and it is the kind of injury that a damages remedy cannot undo after the fact.
Two courts, two days, two outcomes
The same week produced opposite results in different courtrooms, which is a fair measure of how much now turns on which claim a judge is willing to hear. On Thursday, a judge rejected a request for a temporary restraining order in another case that sought to halt work in and around the park, the case that had been tied to the pause through September. On Friday, Cardone granted the injunction in this one.
The two outcomes are not necessarily inconsistent. A temporary restraining order asks a court to act in days on a record that is still being assembled. A preliminary injunction asks the same question on a fuller record, and the plaintiff has to show a likelihood of success, irreparable harm, and that the balance of hardships and the public interest favor a pause. Cardone found all of that in the case before her. The other court, on the record before it, did not.
Read together, the two rulings describe a boundary rather than a contradiction. Challenges built on the environmental statutes the waiver set aside have struggled. Challenges built on structural limits the waiver cannot touch have, at least once, succeeded. That is a map for the rest of the litigation, and it explains why the plaintiffs spent five months refining the constitutional theory rather than arguing about the park.
The government's case for operational control
The government's position is that physical infrastructure is necessary even in a lightly crossed stretch like Big Bend, because the goal is operational control of the border, which the department defines as zero unauthorized crossings. Officials have argued that traffic shifts toward whatever ground remains open, so a gap in the barrier invites crossings that the sector does not see today. The commissioner's statement about future cartel activity follows the same logic: the relevant threat is the one that appears after the wall goes up elsewhere.
The plaintiffs' response is that the numbers do not support the premise, and that the environmental cost of grading roads and clearing ground through a national park cannot be undone if the government turns out to be wrong. The immediate stakes are physical. The region's contracts for border infrastructure run to more than $7.5 billion, covering walls, roads, fences, lighting and sensors. The Big Bend piece differs from the barrier built elsewhere: much of what was planned for the park is roads, vehicle barriers and surveillance equipment rather than the 30-foot panels that define the project farther west. Six lawsuits have been filed over the Big Bend work, and more than 140 outfitters, businesses and recreation groups have asked Texas officials to protect public access to the Rio Grande.
The Center for Biological Diversity says the waivers marked the first time the federal government set aside a broad set of environmental laws inside a national park, and its national public lands advocate, Laiken Jordahl, called the ruling a historic victory for the park and added that the fight is far from over. Customs and Border Protection said it stands by its legal authorities and is working with the Department of Justice on next steps, which is a plain way of saying an appeal is likely.
What Friday did not decide
An injunction of this kind is a holding about the next few months, not a verdict. It keeps the ground undisturbed while the parties litigate whether the government's approach to the project is lawful, and it can be narrowed or lifted by the Fifth Circuit before the district court ever reaches a final judgment. The government's appeal will argue that the injunction reaches too far, that the claims belong to the political branches, and that a single district judge should not be running construction schedules on the border. The plaintiffs will argue that the separation of powers question is for courts precisely because the executive has claimed the power to answer it alone.
Both of those arguments are about the same thing, which is who reviews the decision and on what record. The project's legal protection was never the strength of its environmental analysis. It was the removal of the statutes that would have required one, and with them the ordinary channel for challenging the work. A court has now reopened a narrow channel that runs around the waiver instead of through it, and the government has to defend the project on ground that Congress did not waive and cannot waive for it.
However the appeal comes out, the ruling leaves the practical question visible in a way that the waiver was meant to hide. A road cut into a national park is either within the government's power or it is not, and someone has to decide. For this season, a district judge has said that she will, at least until the arguments are finished.
Primary sources
- Center for Biological Diversity for the press release of Oct. 2, 2026, the plaintiffs' filings, the crossing figures for the Big Bend Sector, the number of lawsuits, and the account of construction and the August pause.
- Texas Tribune for the hearing account, the plaintiffs' claims, the waiver of the Endangered Species Act and the National Environmental Policy Act, the contract value, and the temporary restraining order denied on Oct. 1, 2026.
- The Hill for the terms of the injunction, the court's findings on likelihood of success and irreparable harm, and the reaction from Customs and Border Protection.
- ABC News for the scope of the injunction across the Big Bend Sector and the timeline of the first wall panels.
- Illegal Immigration Reform and Immigrant Responsibility Act of 1996, section 102(c), for the waiver authority the government has relied on.