Environmental groups have filed a federal lawsuit to stop a 516-miles natural gas pipeline project that would travel through three Southeastern states.

Groups including the Sierra Club filed the lawsuit Wednesday in the 11th U.S. Circuit Court of Appeals in Atlanta.

The suit against the U.S. Army Corps of Engineers comes less than a week after the $3.2 billion Sabal Trail project received final federal approvals, including permits to discharge dredge materials into wetlands and other water bodies.

The project, a joint effort by Houston-based Spectra Energy, Duke Energy of North Carolina, and Florida Power & Light, will carry natural gas from Alabama, through Georgia, into Florida.

The suit says the project poses a threat to drinking water sources in the region.

The Corps did not immediately respond to a request for comment on the lawsuit.