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

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.

A federal judge is deciding whether to close or keep open a detention site in the Everglades, which environmentalists and the Miccosukee Tribe claim violates the National Environmental Policy Act and threatens endangered species and tribal homelands.