Construction of “Alligator Alcatraz” could be halted indefinitely as a federal judge considered whether the development on wetlands violates environmental laws.

Gov. Ron DeSantis has said the location in the rugged and remote Everglades was meant as a deterrent against escape, much like the island prison in California that Republicans named it after. The detention center has an estimated annual cost of $450 million, according to a public database.

Environmentalists and the Miccosukee Tribe are urging U.S. District Judge Kathleen Williams to issue a preliminary injunction halting operations and construction at the site.