Technical corrections only. v3 incorporates a minor textual amendment from the reported version, correcting "Nuclear Energy Regulatory Commission" to "Nuclear Regulatory Commission" in Section 2(d)(3)(A). The bill also updates its designation from "A BILL" to "AN ACT" reflecting its passage in the Senate. No substantive policy changes were made.
Legacy Mine Cleanup Act of 2025
- Sponsor
- Sen. Kelly, Mark [D-AZ]
- Committees
- Environment and Public Works Committee (primary)
- Last action
- Nov 20, 2025
Bottom line
This bill creates a dedicated EPA office to streamline and enhance the cleanup of abandoned hardrock mines, particularly focusing on coordination, best practices, and addressing severe contamination on the Navajo Nation.
What it actually does
This bill establishes the Office of Mountains, Deserts, and Plains within the Environmental Protection Agency (EPA) to coordinate and improve cleanup actions at hardrock mine sites across the United States, including those in Indian country. It mandates the creation of a priority mine list, the development of best practices for cleanup, and specific interagency plans for addressing uranium contamination on the Navajo Nation.
Proponents argue
Supporters argue this bill will improve the efficiency and effectiveness of critical environmental cleanups, especially in underserved and heavily impacted regions. They highlight the need for better coordination among federal agencies, states, and tribes, and the importance of addressing the legacy of hardrock mining, particularly the severe uranium contamination on the Navajo Nation.
Opponents contend
Critics might argue that establishing a new office within the EPA adds unnecessary bureaucracy and could duplicate efforts already underway through existing programs. They might contend that current authorities are sufficient if properly resourced and managed, and that a new office might divert resources from direct cleanup actions.
The bill is concise and clearly structured, allowing for a quick and comprehensive understanding of its provisions.
Section 2(b)
Office Establishment
This provision formally establishes a new office within the Environmental Protection Agency (EPA), specifically within the office that manages solid waste programs. This new office, to be headed by a Director selected by the Administrator, is designed to centralize and coordinate efforts related to the cleanup of abandoned hardrock mine sites across various landscapes.
Supporters argue
Supporters argue that a dedicated office will provide necessary focus and coordination for complex mine cleanup challenges, ensuring that these issues receive consistent attention and resources within the EPA.
Critics contend
Some might argue that creating a new office could lead to increased administrative costs and potential bureaucratic inefficiencies, suggesting that existing EPA structures could be adapted to address these needs.
Tradeoffs
The tradeoff is between the potential for enhanced focus and coordination versus the risk of increased administrative overhead and potential duplication of existing functions.
Section 2(c)
Mandated Coordination and Best Practices
This section outlines the core functions of the new Office, including coordinating cleanup actions between EPA headquarters, regional offices, and stakeholders. It also tasks the Office with establishing and disseminating best practices for cleanup, identifying innovative technologies, coordinating with federal land management agencies and voluntary groups, and encouraging small business contracting opportunities for cleanup actions.
Section 2(d)(1)
Annual Priority Mine Site Identification
The Administrator, through the new Office, is required to annually identify and prioritize covered mine sites for cleanup actions. This list can include sites both on and off the National Priorities List (Superfund sites). The Administrator must also submit an annual report to Congress detailing the methodology used for prioritization and the status of cleanup actions at listed sites, while coordinating with various stakeholders to update the list and share best practices.
Section 2(d)(3)
Navajo Nation Uranium Mine Cleanup Plans
This provision mandates the Administrator, in cooperation with several other federal agencies (including Energy, Interior, HHS, NRC, Indian Health Service, ATSDR) and in consultation with affected Tribal governments, to develop a 10-year interagency plan for cleanup actions at Navajo Nation abandoned uranium mine sites. These plans, to be updated every 10 years, must include cleanup goals, target dates, projected appropriations, and specific activities for each agency.
Defines "cleanup action" by referencing several existing environmental laws (CERCLA, Good Samaritan Act of 2024, Solid Waste Disposal Act, Federal Water Pollution Control Act) and "covered mine site" as Federal, State, Tribal, local, and private land affected by past hardrock mining activities and contiguous water resources.
Section 2(a)(3) and 2(a)(4)
Why it matters:Standard legislative practice to define terms upfront and to leverage existing legal frameworks rather than creating entirely new ones.
Case for: Supporters argue that leveraging existing authorities ensures consistency with established environmental law and avoids creating redundant or conflicting regulatory frameworks.
Case against: Critics might argue that relying on a patchwork of existing laws, some of which are complex, could hinder the new Office's ability to act swiftly or with novel approaches, potentially limiting its effectiveness.
Estimated impact: Clarifies the scope of the Office's activities, ensuring it operates within established legal boundaries for environmental remediation.
Explicitly states that nothing in the Act provides the Administrator with new regulatory authority or establishes a default standard for cleanup actions beyond existing law.
Section 2(e)
Why it matters:This is likely included to address concerns from stakeholders (e.g., industry, states) that the new office might overstep existing regulatory boundaries or create new, more stringent cleanup requirements without explicit legislative intent. It reassures that the bill is about coordination, not new regulation.
Case for: Proponents would argue this provision is crucial for garnering broader support, particularly from those wary of federal overreach or new regulatory burdens, by clarifying the bill's limited scope to coordination and existing authorities.
Case against: Critics might contend that by explicitly limiting new regulatory authority, the bill might miss an opportunity to empower the EPA with stronger tools needed to address the most challenging mine cleanup sites effectively.
Estimated impact: Prevents the new Office from unilaterally expanding EPA's regulatory power or setting new cleanup standards, ensuring its role is primarily facilitative and coordinative.