Department of Energy Monitors Uranium Mill Sites
Federal officials are employing new monitoring and planting strategies at legacy uranium mill sites in the American West.
Updated on Sept. 28, 2026 in Nuclear
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The Department of Energy Office of Legacy Management is utilizing virtual mapping technology to track a nitrate plume at a former uranium processing site in Monument Valley, Arizona. Simultaneously, the agency is managing groundwater at a former mill facility in Rifle, Colorado, through strategic vegetation planting.
Why it matters
These initiatives demonstrate the Department of Energy's ongoing efforts to assess the effectiveness of long-term remediation plans at former uranium processing sites. By employing these techniques, the agency aims to prevent groundwater contamination near buried disposal cells.
Scientists utilize virtual mapping software to track the precise size and movement of nitrate plumes at the Monument Valley location. At the Rifle site, vegetation is seeded to actively reduce water contact with the buried disposal cell.
The players
Department of Energy Office of Legacy Management
This federal agency is responsible for long-term stewardship and environmental remediation of sites related to the United States' historical nuclear weapons production and research programs.
The details
At the Monument Valley site, the Department of Energy uses virtual technology to assess the impact of plant-based treatment on nitrate contamination. In Colorado, the agency utilizes specific vegetation types to manage the interaction between groundwater and a buried disposal cell at the former mill location.
Timeline
September 28, 2026: The Department of Energy provided status updates on its remediation activities.
The Big Picture
These projects are part of the Department of Energy Office of Legacy Management's long-term stewardship program. The work shifts environmental remediation from simple containment to active, technology-driven monitoring and biological management.
These remediation efforts help secure former processing sites, potentially reducing the risk of radioactive or chemical leakage into regional water tables. Residents near such facilities may observe ongoing monitoring and landscape management activities as part of the safety protocols.
The takeaway
Legacy site management relies on a combination of digital tracking and biological interventions to ensure long-term environmental safety. Property owners or residents near former mill sites can contact the Department of Energy for information regarding active site-specific safety measures.
Further reading
Learn more about the history and management of contaminated sites on the United States Nuclear section page.
Source note: This article includes information reported by Ans.
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