A federal judge on Thursday ordered that no more immigrant detainees be sent to a center in the Florida Everglades, and that much of the facility be dismantled. The ruling rebuked the state and federal governments for failing to consider potential environmental harms before building the facility, known as Alligator Alcatraz.

The judge gave both branches of the government 60 days to move out existing detainees and begin to remove fencing, lighting, power generators and other materials. The order also prohibits any new construction at the site.

The decision is a major legal setback for the detention center, the nation’s first state-run facility for federal immigration detainees, which has faced several lawsuits and numerous complaints about poor conditions and other problems. The state is expected to appeal.

Judge Kathleen M. Williams of the Federal District Court in Miami found that the state and federal governments had violated a federal law that requires an environmental review before any major federal construction project. Judge Williams partly granted a preliminary injunction sought by environmentalists and the Miccosukee Tribe, whose members live in the area. The detention center is surrounded by protected lands that form part of the sensitive Everglades ecological system.

The detention center presents risks to wetlands and to communities that depend on the Everglades for their water supply, including the Miccosukee, Judge Williams found.

“The project creates irreparable harm in the form of habitat loss and increased mortality to endangered species in the area,” she wrote.