Technical corrections only. The two versions of H.R. 1366 are substantively identical, with v4 reflecting only updates to the legislative status, such as being received and placed on the calendar in the Senate, and the addition of the Clerk's name. No policy changes or textual modifications were made to the bill's provisions.
Mining Regulatory Clarity Act
- Sponsor
- Rep. Amodei, Mark E. [R-NV-2]
- Committees
- Natural Resources Committee (primary)
- Last action
- Mar 17, 2026
Bottom line
The bill provides regulatory clarity for hardrock mining operations by expanding mill site allowances and creates a dedicated funding stream for abandoned mine cleanup from fees on these new sites.
What it actually does
This bill amends the Revised Statutes of the United States to explicitly allow hardrock mining operators to locate multiple mill sites on public land for operations like waste rock disposal, clarifying a long-standing regulatory ambiguity. It also establishes an 'Abandoned Hardrock Mine Fund,' financed by claim maintenance fees from these new mill sites, with funds dedicated to abandoned mine land reclamation efforts.
Proponents argue
Proponents argue this bill provides necessary regulatory clarity for the mining industry, enabling more efficient and secure operations by allowing multiple mill sites, which is crucial for modern mining. They also highlight the benefit of establishing a dedicated fund for abandoned mine reclamation, ensuring that new mining activities contribute to addressing historical environmental liabilities.
Opponents contend
Opponents might argue that expanding mill site allowances could lead to increased land use for mining-related activities, potentially impacting environmental conservation or other public land uses, especially on non-mineral lands. Concerns could also be raised about the adequacy of the funding mechanism for abandoned mine cleanup relative to the potential environmental footprint of expanded operations.
The bill is relatively short and accessible, allowing for a quick understanding of its core provisions within the typical timeframes given for legislative review.
Section 2(a) amending 30 U.S.C. 42
Authorization of Additional Mill Sites for Hardrock Mining Operations
This provision amends existing law to allow hardrock mining operators to locate and use multiple mill sites on public land. A 'mill site' is defined as land reasonably necessary for waste rock or tailings disposal or other operations incident to mineral development, as long as it's part of an approved plan of operations. Each mill site is limited to 5 acres, does not convey mineral rights, and is not eligible for patenting.
Supporters argue
Supporters argue this provision provides essential regulatory clarity, resolving ambiguities in existing law that have led to litigation and uncertainty for mining companies. It ensures that necessary infrastructure for modern mining operations can be legally established, promoting domestic mineral production.
Critics contend
Critics may argue that expanding mill site allowances could lead to greater environmental disturbance and land fragmentation on public lands, even if the sites themselves don't convey mineral rights. They might express concern about the cumulative impact of multiple sites.
Tradeoffs
Balances the need for regulatory certainty and operational efficiency for the mining industry with concerns about public land use and environmental impacts.
Section 2(b)
Creation of Dedicated Fund for Abandoned Mine Reclamation
This section establishes a new 'Abandoned Hardrock Mine Fund' in the U.S. Treasury. It mandates that claim maintenance fees collected from the newly authorized mill sites will be deposited into this fund. The Secretary of the Interior is authorized to make expenditures from this fund, without further appropriations, specifically for carrying out abandoned mine reclamation activities as outlined in the Infrastructure Investment and Jobs Act.
Section 2(c) amending 30 U.S.C. 28f
Updates to Mining Law References and Fee Structure Language
This section makes several technical and clerical amendments to the Omnibus Budget Reconciliation Act of 1993. It updates references to 'the Mining Law of 1872' to the more precise 'sections 2319 through 2344 of the Revised Statutes of the United States (30 U.S.C. 22 et seq.)'. It also restructures the language regarding claim maintenance fees and location fees, primarily by adding subparagraphs for clarity without changing the substantive fee requirements.
This subsection includes a series of 'savings provisions' that clarify what the new mill site rules *do not* affect. It explicitly states that nothing in the subsection diminishes existing claimant rights, creates new rights on land not open to mining, modifies land withdrawals, limits federal regulatory authority (including for claim validity examinations), restores extinguished rights, or modifies a specific provision of the Consolidated Appropriations Act, 2024.
Section 2(a)(8) of the new 30 U.S.C. 42(c)
Why it matters:Standard legislative practice to ensure the new provisions do not inadvertently override or conflict with existing laws, regulations, or established rights. It's a protective measure rather than an evasive one.
Case for: Proponents argue these provisions are crucial for legal certainty, preventing unintended consequences and ensuring the new mill site rules integrate smoothly into the complex framework of federal land management and mining law without creating new conflicts or undermining environmental protections.
Case against: Critics might argue that while seemingly benign, the specificity of some savings clauses (e.g., referencing a particular appropriations act) could be interpreted as subtly reinforcing certain existing limitations or exemptions, or that the broad nature of 'not diminishing any right' could be seen as protecting industry interests more than necessary.
Estimated impact: Prevents unforeseen legal challenges and clarifies the scope of the bill's changes, potentially saving significant legal and administrative costs by avoiding litigation over conflicting statutes.
The bill defines 'public land' for the purpose of mill site locations to include land that is 'mineral-in-character,' 'nonmineral land,' and 'land where the mineral character has not been determined.' This broad definition ensures that mill sites can be located on various types of public land, not just those proven to be mineral-bearing.
Section 2(a)(1)(D) of the new 30 U.S.C. 42(c)
Why it matters:Definitions are standard legislative practice. The breadth of this definition is crucial for the bill's intent to provide flexibility for mill site locations, as mill sites are for processing and waste, not necessarily for mineral extraction themselves.
Case for: Proponents argue this definition is essential for practical mining operations, as mill sites (for processing, waste disposal, etc.) often need to be located on land that is not necessarily mineral-bearing itself but is adjacent or otherwise suitable for industrial infrastructure. It provides necessary flexibility.
Case against: Critics might argue that allowing mill sites on 'nonmineral land' or land where character is 'not determined' could open up more public land to industrial use than strictly necessary for mineral extraction, potentially impacting areas with other high conservation or recreational value.
Estimated impact: Significantly broadens the scope of public lands where mill sites can be established, facilitating mining operations but potentially increasing the footprint of mining-related infrastructure on diverse land types.