A federal judge is pressing U.S. officials to explain why it has taken three decades to decide on a proposal to drill for natural gas just outside Glacier National Park in an area considered sacred by some Indian tribes in Montana and Canada.

A frustrated U.S. District Judge Richard Leon called the delay “troubling” and a “nightmare” during a recent court hearing. He ordered the Interior and Agriculture departments to report back to him with any other example of where they have “dragged their feet” for so long.

“This is no way to run a government. No way to run a government,” Leon told government attorney Ruth Ann Storey, according to a transcript of the June 10 hearing in Washington, D.C.

At issue in the case is a 6,200-acre energy lease in the Badger-Two Medicine area near Glacier. Owned by Solenex LLC of Baton Rouge, Louisiana, the lease has been suspended since the 1990s.

Solenex sued in 2013 to overturn the suspension and wants to begin drilling for gas this summer. It’s represented by the Mountain States Legal Foundation, a Colorado law firm that handles property rights cases and has numerous representatives of the oil and gas industry on its board of directors.

U.S. Justice Department spokesman Wyn Hornbuckle said Wednesday the government will submit a response to the judge’s concerns next week. He declined to elaborate.

The Badger-Two Medicine area is the home of the creation story of four tribes in Canada and Montana and the Sun Dance that is central to their religion. The land is part of the Lewis and Clark National Forest but is not on Montana’s Blackfeet Reservation.

Dozens of oil and gas leases were originally sold in the area, but over the years most have been retired or surrendered. Only 18 suspended leases remain, including Solenex’s.

Tribal leaders have asked Interior Secretary Sally Jewell to cancel the leases.

The Interior Department issued the energy lease to Solenex in 1982, and the Forest Service in 1996 asked for it to be suspended so the agency could perform a historic preservation survey of the site. That was completed in 2012, but there’s been no final decision on whether the lease should remain in place.

Mountain States Legal Foundation president William Perry Pendley noted the boundaries of the traditional cultural area for the tribes were studied and expanded several times since the leases were issued.

“The feds have thrown money at the tribes and these consultants to do these additional studies,” he said. “The bottom line is, this is national forest land.”

But Blackfeet Tribal Historic Preservation Officer John Murray rejected any suggestion that the studies were a ploy to block Solenex. He said the Montana tribe opposed the leases from the time they were issued and considered the original cultural studies of the area inadequate.

“It’s paramount that it’s protected. Bad research does not negate the importance of the area to the Blackfeet,” Murray said.

Storey defended the government’s handling of the Solenex case in her appearance before Judge Leon. She said it took many years to conduct the necessary site studies, and working with the tribes meant the process wasn’t entirely within the agencies’ control.

The Forest Service in December determined drilling would adversely affect the sacred site and reduce its spiritual power for the Blackfeet.

The Advisory Council on Historic Preservation agreed with that finding in January. Its recommendations on how to proceed are pending.

Forest Service spokesman Dave Cunningham said he was not aware of a timeline for a decision.