The fate of a makeshift immigrant detention center in the Florida Everglades dubbed “Alligator Alcatraz” hung in the balance on Wednesday as a federal judge considered whether building on sensitive wetlands violated 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.

U.S. District Judge Kathleen Williams said Wednesday following days of testimony about the environmental impacts of the Everglades immigration detention camp that she plans to rule no later than Aug. 21 on a request to temporarily shut it down.