Technical corrections only. The changes between v1 and v2 reflect updates to the bill's legislative status, including its reporting out of committee and the assignment of a calendar and report number. There are no substantive policy changes to the bill's text.
Mining Regulatory Clarity Act
- Sponsor
- Sen. Cortez Masto, Catherine [D-NV]
- Committees
- Energy and Natural Resources Committee (primary)
- Last action
- Feb 11, 2026
Bottom line
The bill provides regulatory clarity for hardrock mining mill sites and creates a new, industry-funded mechanism for cleaning up abandoned mines on public lands.
What it actually does
This bill amends existing hardrock mining law to clarify and expand the ability of mining operators to locate multiple mill sites on public land, provided these sites are reasonably necessary for their operations and are part of an approved plan of operations. It also establishes a dedicated 'Abandoned Hardrock Mine Fund,' to be financed by claim maintenance fees collected from these newly authorized mill sites, with the explicit purpose of funding abandoned mine cleanup and reclamation activities.
Proponents argue
Proponents argue that the bill provides essential regulatory clarity for modern hardrock mining operations, reducing legal uncertainty and streamlining the process for securing necessary land for waste disposal and other operational needs. They also highlight the creation of a dedicated, self-sustaining fund for abandoned mine cleanup as a responsible and innovative approach to addressing a significant environmental legacy without burdening general taxpayers.
Opponents contend
Opponents might contend that expanding the ability to locate multiple mill sites, even with a 5-acre limit per site, could lead to an increased footprint of mining-related infrastructure on public lands, potentially impacting conservation efforts and sensitive ecosystems. Concerns may also be raised regarding the adequacy of the new funding mechanism to address the vast scale of abandoned mine remediation, suggesting it might be an insufficient solution to a large problem.
The bill is relatively short and clearly structured, making it accessible for an informed reader to understand its core provisions and implications within a short timeframe.
Section 2(a), adding 30 U.S.C. 42(c)(1)
Clarifying Definitions for Mill Sites and Public Land
This provision defines 'mill site' as public land reasonably necessary for waste rock or tailings disposal or other operations incident to mineral development under an approved plan of operations. It also clarifies that 'public land' eligible for mill sites includes mineral-in-character, nonmineral, and undetermined land that is open to location under general mining laws. These definitions aim to provide clear guidance for mining operators and federal land managers.
Supporters argue
Proponents argue that these definitions resolve long-standing ambiguities in mining law, reducing potential for litigation and ensuring consistent application of regulations across different federal land jurisdictions. This clarity is crucial for efficient planning and operation of mining projects.
Critics contend
Critics might express concern that by explicitly including 'nonmineral land' in the definition of 'public land' eligible for mill sites, the bill could facilitate the use of areas previously considered unsuitable for mining infrastructure, potentially expanding the overall footprint of mining operations.
Tradeoffs
The provision balances the industry's need for clear operational definitions with potential concerns about the scope of land that can be used for mining-related infrastructure. It aims to streamline permitting while requiring adherence to approved plans of operations.
Section 2(a), adding 30 U.S.C. 42(c)(2)
Authorization of Multiple Mill Sites
This section explicitly permits the proprietor of a lode or placer claim to locate and include 'as many mill site claims... as are reasonably necessary for its operations' within a proposed plan of operations. This clarifies that operators are not limited to a single mill site per mining claim, addressing a historical ambiguity in the General Mining Law of 1872.
Section 2(a), adding 30 U.S.C. 42(c)(3) and (4)
Non-Mineral Rights and Size Limitation for Mill Sites
This provision clarifies that a mill site located under the new subsection does not convey mineral rights to the locator, meaning these sites are strictly for surface operations and not for mineral extraction. Additionally, it sets a clear size limit, stating that a single mill site location shall not exceed 5 acres.
Section 2(b)
Creation of the Abandoned Hardrock Mine Fund
This section establishes a new 'Abandoned Hardrock Mine Fund' in the U.S. Treasury. It mandates that all claim maintenance fees collected by the Secretary of the Interior from mill sites located under the bill's new provisions must be deposited into this fund. The funds are then made available, without requiring further appropriations, solely for carrying out abandoned mine land reclamation activities as authorized by the Infrastructure Investment and Jobs Act.
These clauses define 'operations,' 'operator,' and 'plan of operations' by referencing specific sections of title 43 and title 36 of the Code of Federal Regulations (CFR). For example, 'operations' and 'operator' are defined by 43 CFR 3809.5, and 'plan of operations' by 43 CFR 3809 and 36 CFR 228.
Section 2(a), adding 30 U.S.C. 42(c)(1)(B) and (C)
Why it matters:This is standard legislative practice to ensure consistency with existing federal regulations governing mining activities on public lands. It avoids redundancy and ensures that the new provisions integrate seamlessly into the established regulatory framework.
Case for: Ensures that the new mill site provisions are fully aligned with and subject to the established operational and environmental approval requirements for mining on federal lands, providing regulatory continuity and clarity for agencies and operators.
Case against: Requires external research for a complete understanding of the bill's practical implications, potentially making it less accessible to those unfamiliar with federal mining regulations.
Estimated impact: Ensures regulatory consistency for all mining operations, including mill sites, by integrating them into existing environmental and operational review processes.
This section contains a series of 'Savings Provisions' that explicitly state the bill does not diminish existing claimant rights, create or increase rights on land not open to location under general mining laws, modify land withdrawals, limit federal government's right to regulate mining (including under various environmental and historic preservation acts), restore extinguished rights, or modify a specific provision of the Consolidated Appropriations Act, 2024.
Section 2(a), adding 30 U.S.C. 42(c)(8)
Why it matters:This is standard legislative practice to prevent unintended consequences and clarify that the bill's specific changes do not override or weaken existing environmental protections, land withdrawals, or regulatory authorities. It aims to preempt broader legal challenges.
Case for: Protects existing environmental and land use regulations, ensuring the bill's focus remains on mill site clarity and abandoned mine cleanup without inadvertently undermining broader conservation efforts or federal regulatory powers.
Case against: No direct opposition, as these are protective clauses. However, some might argue that the extensive list of limitations highlights the potential for the bill to be misconstrued as weakening environmental protections, necessitating such detailed caveats.
Estimated impact: Significantly limits the scope of the bill, ensuring it does not override existing land withdrawals, environmental laws, or federal regulatory authority, thereby preventing a broader expansion of mining rights.
This section makes 'Clerical Amendments' to Section 10101 of the Omnibus Budget Reconciliation Act of 1993 (30 U.S.C. 28f). It replaces references to 'the Mining Law of 1872 (30 U.S.C. 28-28e)' with the more precise 'sections 2319 through 2344 of the Revised Statutes (30 U.S.C. 22 et seq.)' and restructures subsections within 30 U.S.C. 28f for improved readability and clarity.
Section 2(c)
Why it matters:This is a technical cleanup to ensure consistency in statutory references across federal law, reflecting modern legislative drafting practices and improving legal precision.
Case for: Modernizes and clarifies statutory references, improving legal precision and ensuring that the correct foundational law is cited when referring to the General Mining Law.
Case against: No specific opposition; these are technical, non-substantive changes to improve legal accuracy.
Estimated impact: Minimal direct policy impact; primarily administrative and legal clarification.