The U.S. Supreme Court on Monday refused to hear a challenge to a federal ban on new uranium mines near the Grand Canyon.
The court did not comment on its refusal to take up the case brought by the National Mining Association and the American Exploration and Mining Association.
The groups had hoped to overturn a 2012 Obama-era decision to halt the construction of new uranium mines near the Grand Canyon.
The Havasupai Tribe, the Sierra Club and the Center for Biological Diversity all opposed rescinding the ban.
In 2017, a federal appeals court also refused to end the new mine ban.