The Navajo Nation can pursue its lawsuit seeking to force the federal government to secure water from the Colorado River for the reservation, the Ninth Circuit said Wednesday, reversing a lower court’s dismissal of the tribe’s breach of trust claim.

The tribe doesn’t seek a judge’s determination of its rights to the river, which the Interior Department says would fall under the Supreme Court’s original jurisdiction, according to the U.S. Court of Appeals for the Ninth Circut.