The Legacy Mine Cleanup Act of 2025 would establish within the Environmental Protection Agency an Office of Mountains, Deserts, and Plains to coordinate cleanup actions at covered mine sites across federal, state, tribal, and local lands. The act defines key terms and scopes the office’s authority to include tribal lands and Navajo Nation abandoned uranium mine sites, with the Administrator identifying priority sites each year and coordinating cleanup actions with multiple federal, state, and tribal partners.
It also creates a pathway to share best practices, promote innovative cleanup technologies and reuse options, and foster contracting opportunities for small businesses to participate in cleanup projects.
Beyond coordination, the bill elevates interagency collaboration—working with the Secretary of the Interior, Agriculture, Energy, Health and Human Services, the Nuclear Regulatory Commission, and others—to ensure interagency plans and government-to-government consultations with tribes. Importantly, the act preserves existing authorities and does not grant new regulatory powers or default standards, but it does set up a structured framework intended to speed cleanup where there is no identifiable potentially responsible party.
At a Glance
What It Does
Creates the EPA Office of Mountains, Deserts, and Plains and assigns it duties to coordinate cleanup actions at covered mine sites, disseminate best practices, and promote interagency cooperation with tribes and other agencies.
Who It Affects
EPA headquarters and regional offices, federal land management agencies, states, Indian Tribes (including Navajo Nation), Alaska Native Corporations, watershed groups, mining companies, and potentially responsible parties involved in cleanup actions.
Why It Matters
The act centralizes coordination for legacy mining contamination, prioritizes sites for action, incorporates tribal consultation, and encourages adoption of innovative cleanup approaches, with a focus on sites lacking clear responsible parties.
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What This Bill Actually Does
The bill would create a dedicated Office of Mountains, Deserts, and Plains within the EPA to coordinate cleanup actions at covered mine sites that span federal, state, tribal, and local land. It defines several terms to clarify who the office will work with and what constitutes a cleanup action, including uranium sites on the Navajo Nation.
The office would coordinate among EPA headquarters, Regional Offices, and other federal agencies, as well as with states, Indian Tribes, and non-governmental organizations, to ensure cleanup actions are carried out efficiently and consistently.
A core duty of the office is to identify and publish an annual list of prioritized covered mine sites, describing the methodology used to select them and the status of cleanup actions. The bill also directs the office to develop and share best practices for cleanup methods, technologies, and waste-management solutions, and to identify opportunities for reuse of mined land and materials.
The act requires interagency coordination—especially with tribal governments and Alaska Native Corporations—to support government-to-government consultations and to pursue contracting opportunities for small businesses to participate in cleanup work.Specific provisions call for a 10-year interagency plan related to Navajo Nation abandoned uranium mine sites, including goals, target dates, and funding projections, and require regular reporting to Congress. The act envisions technical assistance from the EPA to states, local governments, and tribes for cleanup actions.
Finally, it preserves existing statutory authority and clarifies that the bill does not create new regulatory powers or default standards. The overall aim is to accelerate and improve cleanup while engaging affected communities and leveraging private-sector participation where appropriate.
The Five Things You Need to Know
The Office of Mountains, Deserts, and Plains will be established within the EPA to coordinate cleanup actions at covered mine sites.
An annual Priority Mine List must be created, with methodology and status reports submitted to Congress.
The bill requires interagency coordination, tribal government-to-government consultations, and contractor opportunities for small businesses.
A 10-year interagency plan for Navajo Nation abandoned uranium mine sites is mandated, with goals, target dates, and funding projections.
The act preserves existing authorities and does not create new regulatory powers or default standards.
Section-by-Section Breakdown
Every bill we cover gets an analysis of its key sections.
Short title
This Act may be cited as the Legacy Mine Cleanup Act of 2025.
Office establishment and definitions
There is established within the EPA an Office of Mountains, Deserts, and Plains, headed by a Director. The section defines key terms, including Administrator, appropriate committees of Congress, cleanup action, covered mine site, Indian country, Navajo Nation abandoned uranium mine site, and Office.
Purposes
The Office is to coordinate cleanup actions at covered mine sites across federal, state, and tribal lands, develop and disseminate best practices and innovative technologies, and coordinate with federal agencies, states, tribes, and NGOs on voluntary cleanup actions and guidance for nonliable parties. It also aims to promote small-business contracting opportunities and interagency collaboration for interagency actions.
Duties
The Administrator must annually identify prioritized covered mine sites and report methodology and status to Congress. The bill requires development of best practices for site assessments and remedial actions, supports tribal government-to-government consultations, and promotes interagency coordination with multiple federal agencies. It also mandates interagency plans for coalitions including tribal governments and, specifically, a 10-year plan for Navajo Nation uranium sites with goals, target dates, and funding projections. The Administrator must provide technical assistance to states, local governments, and tribes.
Savings provisions
Nothing in this section provides the Administrator with new regulatory authority beyond what is already established in law, and it should not be interpreted as creating a default standard or authority for cleanup actions at covered mine sites.
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Explore Environment in Codify Search →Who Benefits and Who Bears the Cost
Every bill creates winners and losers. Here's who stands to gain and who bears the cost.
Who Benefits
- Navajo Nation and other Tribal governments benefit from formal coordination and government-to-government consultations on cleanup actions, including Navajo Nation abandoned uranium mine sites.
- States and local governments gain access to EPA-led coordination and technical support for cleanup actions near their jurisdictions.
- Small businesses and local contractors gain potential contracting opportunities to participate in cleanup projects.
- Communities living near covered mine sites benefit from improved environmental health outcomes and shared best practices for cleanup.
Who Bears the Cost
- EPA and federal taxpayers bear the upfront costs of establishing and operating the Office and coordinating cross-agency actions.
- States, Tribes, and Alaska Native Corporations may incur administrative costs to participate in planning and execution of cleanup actions.
- Potentially responsible parties (where identified) may bear cleanup costs under existing authority; the bill itself does not reallocate those costs.
- Other federal agencies coordinating with EPA may incur additional administrative costs to support interagency action.
Key Issues
The Core Tension
The central dilemma is whether a new coordinating office, operating within existing authorities and funding structures, can meaningfully accelerate cleanup of vast and geographically dispersed mine sites (notably Navajo Nation uranium sites) while maintaining voluntary cooperation and without creating new regulatory powers or standards.
The bill creates a centralized coordination mechanism and expands interagency collaboration, but it relies on existing authorities rather than creating new regulatory powers. This means that while cleanup actions can be prompted and guided through the Office, the framework remains dependent on current laws and funding streams.
A practical tension arises around funding: without dedicated appropriations tied to the new office, timely progress on a large scope of mine-site cleanups—especially Navajo Nation uranium sites—depends on competing priorities within the budget.
Another area of potential tension is the balance between government-to-government reconciliation with Tribes and the nonbinding nature of the Office’s guidance and best practices. While consultations are required, the effectiveness of those consultations in accelerating cleanup hinges on resources, trust, and willingness of potentially responsible parties to participate.
The act also preserves existing authority and explicitly states it does not establish default standards, which could limit the Office’s ability to drive uniform cleanup outcomes across diverse jurisdictions.
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