ROANOKE, Va. (AP) — A federal appeals court has refused to revisit a ruling that struck down a key permit for a proposed natural gas pipeline running through Virginia and West Virginia.

The 4th U.S. Circuit Court of Appeals said Friday that it would not revisit a February ruling by a three-judge panel that invalidated the U.S. Fish and Wildlife Service’s opinion that the Mountain Valley Pipeline would not jeopardize two endangered fish species.

The panel found “serious errors” with the agency’s conclusion that construction of the pipeline wouldn’t pose a threat to the Roanoke logperch or the candy darter.

The February ruling came one week after the same three-judge panel rejected a permit that would have allowed the pipeline to pass through a section of the Jefferson National Forest.