Uranium: The Demon Mineral

The story of uranium on Indigenous land is inseparable from the story of the United States nuclear weapons programme. When the Manhattan Project required raw material, and when the Cold War arms race that followed demanded more of it, the federal government looked to the Colorado Plateau, a vast and geologically rich region that spans parts of present-day Utah, Colorado, New Mexico, and Arizona. Much of that land was and is the territory of the Navajo Nation, the Hopi, Laguna Pueblo, and other communities. What followed was one of the most consequential and least remedied environmental disasters in American history.

The Scale of Extraction

Between the late 1940s and 1986, when the last of the major operations wound down, more than four million tons of uranium ore were extracted from Navajo lands alone. The Atomic Energy Commission, a federal agency, was the sole buyer of uranium ore during most of this period. It set the prices. It controlled the contracts. And it consistently withheld from Navajo miners the information that their work was exposing them to radon gas at levels known, even at the time, to cause lung cancer.

Studies conducted within the US Public Health Service as early as the 1950s documented rising rates of lung cancer among uranium miners. Those findings were not shared with the workers or with tribal leadership. The federal government, which held trustee responsibility over the Navajo Nation, was simultaneously operating the programme that was killing Navajo men and suppressing the evidence that it was doing so.

Across the Colorado Plateau, more than 500 abandoned uranium mines sit on Navajo land as of the most recent federal survey, with some estimates placing the total considerably higher once smaller operations are included. Many of these were simply walked away from when the ore ran out or the economics changed. No remediation was required. No liability was attached. The companies that had profited from the extraction were gone. The communities that had lived around the mines remained.

The Health Consequences

The health record is not ambiguous. Studies published in peer-reviewed journals from the 1990s onward documented significantly elevated rates of lung cancer, kidney disease, bone cancer, and other conditions in communities with high exposure to uranium mining activity. The mechanism is well understood: radon gas released during mining, uranium dust tracked home on workers' clothing, water sources contaminated by runoff from tailings piles, and ore-bearing rock used in the construction of homes and community buildings because no one told residents it was dangerous.

The Tuba City area in Arizona, which sits near a former uranium processing mill site, has documented rates of childhood leukaemia and other cancers that have drawn repeated attention from health researchers. The Church Rock spill of 1979, which occurred when a tailings dam at a United Nuclear Corporation facility failed and released 94 million gallons of radioactive liquid into the Puerco River, remains the largest release of radioactive material in United States history. It received a fraction of the media coverage given to the Three Mile Island incident, which happened in the same year and involved no breach of containment.

Families living downstream from Church Rock reported skin rashes from contact with the river water. Livestock died. Wells were contaminated. The cleanup that followed was inadequate and slow. Four decades later, elevated radiation levels have still been detected in the surrounding area.

Kidney disease has become a particular crisis on the Navajo Nation. The kidneys are especially vulnerable to uranium's chemical toxicity, separate from its radioactivity. Research published in the 2000s and 2010s found that Navajo adults showed elevated rates of uranium in their urine and that these levels correlated with proximity to abandoned mine sites and with the use of unregulated water sources. Many homes on the Navajo Nation lack access to the public water system. People have been drinking from wells sunk in contaminated ground.

What Remediation Has and Has Not Happened

The federal response to the uranium legacy on Navajo lands has been characterised by decades of bureaucratic delay, insufficient funding, and jurisdictional disputes between agencies. The Environmental Protection Agency, the Bureau of Indian Affairs, the Nuclear Regulatory Commission, and the Department of Energy have all had overlapping and sometimes contradictory roles in the remediation process.

The Radiation Exposure Compensation Act, passed in 1990 and amended several times since, established a programme to compensate uranium miners and their families for health damage resulting from their work. The amounts available have been widely criticised as inadequate, the eligibility criteria have excluded many claimants, and the application process has been a burden for communities with limited administrative capacity and no legal representation. Many miners died before the programme existed. Many families have been unable to document their claims to the required standard.

The 2008 Navajo Nation Uranium Remediation legislation, combined with EPA clean-up initiatives under various federal programmes, began to address some of the worst abandoned mine sites. Progress has been real but slow. As of the mid-2020s, the vast majority of abandoned mines on Navajo land have not been remediated. The water infrastructure problem has attracted federal attention in recent years, with funding to extend water lines to homes that have relied on contaminated sources, but the work is not complete.

The companies whose operations created this situation bear essentially no ongoing legal liability. Corporate structures were dissolved, operations transferred, or the statutes of limitations expired long before the full scale of the damage was publicly acknowledged. The cost of clean-up, to whatever extent clean-up proceeds, falls on federal taxpayers and on the tribes themselves, who must dedicate staff time and political capital to pushing a bureaucratic process that moves slowly and produces results that are often partial.

The Ongoing Threat

Uranium mining on and near Indigenous land did not end with the 1986 slowdown. Periodic rises in uranium prices have renewed interest in deposits across the Colorado Plateau and elsewhere. Proposals to resume or expand mining near the Grand Canyon, which sits adjacent to the Havasupai Tribal homeland, prompted years of legal and political battles. The Bears Ears National Monument, proclaimed in 2016 and subsequently reduced in 2017, contains areas with uranium deposits and is adjacent to the territory of several sovereign nations whose opposition to expanded extraction has been consistent and clearly stated.

The pattern that produced the original disaster, federal and corporate interests treating Indigenous land as a resource reserve with no accounting for the costs imposed on the people living there, has not structurally changed. What has changed is the capacity of Indigenous communities to organise, litigate, and make their positions known. The Navajo Nation's 2005 ban on uranium mining was an exercise of sovereign authority. It was also a hard-won assertion that a nation that had already paid the cost of one extraction era was not obliged to submit to another.

The term "demon mineral" has the weight of collective memory behind it. It describes not just a physical substance but a relationship: between a federal government that needed something, a corporate sector that profited from extracting it, and communities who were never consulted, never protected, and were left to absorb consequences that the rest of the country barely noticed. Acknowledging that relationship fully, and acting on what acknowledgement requires, is the work that the remediation process, in its current form, has not yet completed.