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S. 544

U.S. SenateSenate Floor Calendar

Summary

S. 544, the Mining Regulatory Clarity Act, was introduced in the Senate on Feb 12, 2025 by Sen. Catherine Cortez Masto (D) with 4 co-sponsors. It last saw action on Feb 11, 2026: Placed on Senate Legislative Calendar under General Orders. Calendar No. 334.


Record

Text

S. 544 has 4 co-sponsors.

sb544/introduced-in-senate.txt
118 S544 IS: Mining Regulatory Clarity Act
U.S. Senate
2025-02-12
text/xml
EN
Pursuant to Title 17 Section 105 of the United States Code, this file is not subject to copyright protection and is in the public domain.
II 119th CONGRESS 1st Session S. 544 IN THE SENATE OF THE UNITED STATES February 12, 2025 Ms. Cortez Masto (for herself, Mr. Risch , Ms. Rosen , Mr. Crapo , and Ms. Murkowski ) introduced the following bill; which was read twice and referred to the Committee on Energy and Natural Resources A BILL
To provide for the location of multiple hardrock mining mill sites, to establish the Abandoned Hardrock Mine Fund, and for other purposes.
1.
Short title
This Act may be cited as the Mining Regulatory Clarity Act .
2.
Hardrock mining mill sites
(a)
Multiple mill sites
Section 2337 of the Revised Statutes ( 30 U.S.C. 42 ) is amended by adding at the end the following:
(c)
Additional mill sites
(1)
Definitions
In this subsection:
(A)
Mill site
The term mill site means a location of public land that is reasonably necessary for waste rock or tailings disposal or other operations reasonably incident to mineral development on, or production from land included in a plan of operations.
(B)
Operations; Operator
The terms operations and operator have the meanings given those terms in section 3809.5 of title 43, Code of Federal Regulations (as in effect on the date of enactment of this subsection).
(C)
Plan of operations
The term plan of operations means a plan of operations that an operator must submit and the Secretary of the Interior or the Secretary of Agriculture, as applicable, must approve before an operator may begin operations, in accordance with, as applicable—
(i)
subpart 3809 of title 43, Code of Federal Regulations (or successor regulations establishing application and approval requirements); and
(ii)
part 228 of title 36, Code of Federal Regulations (or successor regulations establishing application and approval requirements).
(D)
Public land
The term public land means land owned by the United States that is open to location under sections 2319 through 2344 of the Revised Statutes ( 30 U.S.C. 22 et seq. ), including—
(i)
land that is mineral-in-character (as defined in section 3830.5 of title 43, Code of Federal Regulations (as in effect on the date of enactment of this subsection));
(ii)
nonmineral land (as defined in section 3830.5 of title 43, Code of Federal Regulations (as in effect on the date of enactment of this subsection)); and
(iii)
land where the mineral character has not been determined.
(2)
In general
Notwithstanding subsections (a) and (b), where public land is needed by the proprietor of a lode or placer claim for operations in connection with any lode or placer claim within the proposed plan of operations, the proprietor may—
(A)
locate and include within the plan of operations as many mill site claims under this subsection as are reasonably necessary for its operations; and
(B)
use or occupy public land in accordance with an approved plan of operations.
(3)
Mill sites convey no mineral rights
A mill site under this subsection does not convey mineral rights to the locator.
(4)
Size of mill sites
A location of a single mill site under this subsection shall not exceed 5 acres.
(5)
Mill site and lode or placer claims on same tracts of public land
A mill site may be located under this subsection on a tract of public land on which the claimant or operator maintains a previously located lode or placer claim.
(6)
Effect on mining claims
The location of a mill site under this subsection shall not affect the validity of any lode or placer claim, or any rights associated with such a claim.
(7)
Patenting
A mill site under this section shall not be eligible for patenting.
(8)
Savings provisions
Nothing in this subsection—
(A)
diminishes any right (including a right of entry, use, or occupancy) of a claimant;
(B)
creates or increases any right (including a right of exploration, entry, use, or occupancy) of a claimant on land that is not open to location under the general mining laws;
(C)
modifies any provision of law or any prior administrative action withdrawing land from location or entry;
(D)
limits the right of the Federal Government to regulate mining and mining-related activities (including requiring claim validity examinations to establish the discovery of a valuable mineral deposit) in areas withdrawn from mining, including under—
(i)
the general mining laws;
(ii)
the Federal Land Policy and Management Act of 1976 ( 43 U.S.C. 1701 et seq. );
(iii)
the Wilderness Act ( 16 U.S.C. 1131 et seq. );
(iv)
sections 100731 through 100737 of title 54, United States Code;
(v)
the Endangered Species Act of 1973 ( 16 U.S.C. 1531 et seq. );
(vi)
division A of subtitle III of title 54, United States Code (commonly referred to as the ‘National Historic Preservation Act’); or
(vii)
section 4 of the Act of July 23, 1955 (commonly known as the Surface Resources Act of 1955 ) (69 Stat. 368, chapter 375; 30 U.S.C. 612 );
(E)
restores any right (including a right of entry, use, or occupancy, or right to conduct operations) of a claimant that—
(i)
existed prior to the date on which the land was closed to, or withdrawn from, location under the general mining laws; and
(ii)
that has been extinguished by such closure or withdrawal; or
(F)
modifies section 404 of division E of the Consolidated Appropriations Act, 2024 ( Public Law 118–42 ).
.
(b)
Abandoned hardrock mine fund
(1)
Establishment
There is established in the Treasury of the United States a separate account, to be known as the Abandoned Hardrock Mine Fund (referred to in this subsection as the Fund ).
(2)
Source of deposits
Any amounts collected by the Secretary of the Interior pursuant to the claim maintenance fee under section 10101(a)(1) of the Omnibus Budget Reconciliation Act of 1993 ( 30 U.S.C. 28f(a)(1) ) on mill sites located under subsection (c) of section 2337 of the Revised Statutes ( 30 U.S.C. 42 ) shall be deposited into the Fund.
(3)
Use
The Secretary of the Interior may make expenditures from amounts available in the Fund, without further appropriations, only to carry out section 40704 of the Infrastructure Investment and Jobs Act ( 30 U.S.C. 1245 ).
(4)
Allocation of funds
Amounts made available under paragraph (3)—
(A)
shall be allocated in accordance with section 40704(e)(1) of the Infrastructure Investment and Jobs Act ( 30 U.S.C. 1245(e)(1) ); and
(B)
may be transferred in accordance with section 40704(e)(2) of that Act ( 30 U.S.C. 1245(e)(2) ).
(c)
Clerical amendments
Section 10101 of the Omnibus Budget Reconciliation Act of 1993 ( 30 U.S.C. 28f ) is amended—
(1)
by striking the Mining Law of 1872 ( 30 U.S.C. 28–28e ) each place it appears and inserting sections 2319 through 2344 of the Revised Statutes ( 30 U.S.C. 22 et seq. ) ;
(2)
in subsection (a)—
(A)
in paragraph (1)—
(i)
in the second sentence, by striking Such claim maintenance fee and inserting the following:
(B)
Fee
The claim maintenance fee under subparagraph (A)
; and
(ii)
in the first sentence, by striking The holder of and inserting the following:
(A)
In general
The holder of
; and
(B)
in paragraph (2)—
(i)
in the second sentence, by striking Such claim maintenance fee and inserting the following:
(B)
Fee
The claim maintenance fee under subparagraph (A)
; and
(ii)
in the first sentence, by striking The holder of and inserting the following:
(A)
In general
The holder of
; and
(3)
in subsection (b)—
(A)
in the second sentence, by striking The location fee and inserting the following:
(2)
Fee
The location fee
; and
(B)
in the first sentence, by striking The claim main tenance fee and inserting the following:
(1)
In general
The claim maintenance fee
.

Tracker

The tracker indicates the progress of this legislation as it moves through the legislative process.

  1. Introduced2025-02-12
  2. Passed Senate
  3. Passed House
  4. Conference
  5. To President
  6. Became Law

CRS Summary

The summaries are the Congressional Research Service’s, one per stage. Read them in full.

Introduced in Senate Feb 12, 2025

sb544/introduced-in-senate.md

Shown Here:
Introduced in Senate (02/12/2025)

Mining Regulatory Clarity Act

This bill allows mining operators to use federal lands for activities ancillary to mining, such as waste disposal, regardless of whether those lands contain mineral deposits valuable enough to be mined (mineral validity). It also establishes the Abandoned Hardrock Mine Fund.

The bill addresses a 2022 decision in the U.S. Court of Appeals for the Ninth Circuit related to the Rosemont Copper Mine in Arizona (commonly known as the Rosemont decision, described further in CRS Report R48166). The court held that mining claims are only allowed where mineral validity has been established and that mill site claims are more appropriate means for establishing a mining waste disposal site under the Mining Act.

The bill allows a mining operator to (1) locate and include within its plan of operations as many mill site claims (e.g., areas for waste rock disposal) as are reasonably necessary for its operations, and (2) use or occupy public land in accordance with an approved plan of operations.

Additionally, the bill requires any revenue generated from fees for such mill site claims to be deposited into the Abandoned Hardrock Mine Fund. The Department of the Interior must use the fund for certain abandoned hardrock mine reclamation activities.

Sponsors

Sen. Catherine Cortez Masto (D) sponsors S. 544, and 4 members have co-sponsored it, all of them from the day it was introduced.

Committees

S. 544 went before 1 committee: Energy and Natural Resources.

Energy and Natural Resources
Energy and Natural Resources
Reported By · Feb 11, 2026 · 314 Bills

Reports

1 committee report has been filed on S. 544, the latest S. Rept. 119-105.

Actions

S. 544 has taken 6 actions since Feb 12, 2025, the latest on Feb 11, 2026.

ChamberAction
Feb 11, 2026
Senate
Committee on Energy and Natural Resources. Reported by Senator Lee without amendment. With written report No. 119-105.Energy and Natural Resources Committee
Feb 11, 2026
Senate
Placed on Senate Legislative Calendar under General Orders. Calendar No. 334.
Apr 9, 2025
Senate
Committee on Energy and Natural Resources. Ordered to be reported without amendment favorably.Energy and Natural Resources Committee
Mar 12, 2025
Senate
Committee on Energy and Natural Resources. Hearings held. Hearings printed: S.Hrg. 119-46.Energy and Natural Resources Committee
Feb 12, 2025
Senate
Read twice and referred to the Committee on Energy and Natural Resources.Energy and Natural Resources Committee

Votes

S. 544 has not gone to a roll call.

2 bills are related to S. 544.

Titles

S. 544 goes by 4 titles, 2 of them short titles.

  • Mining Regulatory Clarity Act — Display Title
  • Mining Regulatory Clarity Act — Short Title(s) as Reported to Senate
  • Mining Regulatory Clarity Act — Short Title(s) as Introduced
  • A bill to provide for the location of multiple hardrock mining mill sites, to establish the Abandoned Hardrock Mine Fund, and for other purposes. — Official Title as Introduced

Cost estimate

The Congressional Budget Office has filed 1 estimate for S. 544, the latest on Jun 8, 2026.


Lobbying

22 clients hired 19 firms and 94 registered lobbyists who named S. 544 in 93 quarterly filings, 2025 to 2026. Reported under the Lobbying Disclosure Act; a filing’s income covers everything its registrant worked that quarter, so the amounts below are the filings’, not this bill’s.

Filed under Natural Resources, Budget/Appropriations, Energy/Nuclear, Defense, Environment/Superfund, Transportation, Clean Air and Water (quality), Real Estate/Land Use/Conservation.

Clients

Who paid to be heard, by how many filings named the bill. The 20 that filed most often, of 22.

ClientBusinessStateFirmsFilingsReported
SECURING AMERICA'S FUTURE ENERGY ALLIANCEDistrict of Columbia18
CENTER FOR BIOLOGICAL DIVERSITYArizona17
NATIONAL MINING ASSOCIATIONDistrict of Columbia17
BARRICK GOLD OF NORTH AMERICA INC.Gold, silver and copper miningUtah16$550K
KINROSS GOLD U.S.A., INC.Precious metals mining company.Nevada16$360K
NEWMONT MINING CORPORATIONMiningDistrict of Columbia16$300K
RACY & ASSOCIATES (ON BEHALF OF PIMA COUNTY)Local/county governmentArizona16$40K
AMERICAN EXPLORATION & MINING ASSOCIATIONWashington16
BARRICK GOLD OF NORTH AMERICADistrict of Columbia16
EARTHWORKSEarthworks is a non-profit organization that protects communities and the environment.District of Columbia16
PERPETUA RESOURCESMining companyIowa14$230K
IONEER USA CORPORATIONLithium Boron mining companyNevada14$120K
LEAGUE OF CONSERVATION VOTERSDistrict of Columbia14
TROUT UNLIMITEDVirginia14
EARTHJUSTICE ACTIONnonprofit advocacy organizationDistrict of Columbia13
REGENERATION ENTERPRISES, INC.Remining, reprocessing and restoration of minesDistrict of Columbia12$100K
RESOLUTION COPPER MINING LLCMiningArizona12$60K
CITIZENS FOR RESPONSIBLE ENERGY SOLUTIONS, INC.District of Columbia12
PERPETUA RESOURCES, CORP.Natural Resources and MiningIdaho11$30K
DEFENDERS OF WILDLIFEDistrict of Columbia11

Firms

Registrants who filed on the bill, by filings.

Lobbyists

Named on the filings that cite the bill. The 20 named most often, of 94.

Filings

The documents themselves, on the Senate’s Lobbying Disclosure site, largest reported first.

ClientRegistrantPeriodReportedDocument
NATIONAL MINING ASSOCIATIONNATIONAL MINING ASSOCIATION2026 second_quarter$820K2nd Quarter - Report
NATIONAL MINING ASSOCIATIONNATIONAL MINING ASSOCIATION2025 second_quarter$760K2nd Quarter - Amendme…
NATIONAL MINING ASSOCIATIONNATIONAL MINING ASSOCIATION2026 first_quarter$720K1st Quarter - Report
NATIONAL MINING ASSOCIATIONNATIONAL MINING ASSOCIATION2025 first_quarter$660K1st Quarter - Report
NATIONAL MINING ASSOCIATIONNATIONAL MINING ASSOCIATION2025 third_quarter$649K3rd Quarter - Report
NATIONAL MINING ASSOCIATIONNATIONAL MINING ASSOCIATION2025 fourth_quarter$640K4th Quarter - Report
CITIZENS FOR RESPONSIBLE ENERGY SOLUTIONS, INC.CITIZENS FOR RESPONSIBLE ENERGY SOLUTIONS, INC.2025 second_quarter$430K2nd Quarter - Report
BARRICK GOLD OF NORTH AMERICABARRICK GOLD OF NORTH AMERICA2025 first_quarter$420K1st Quarter - Report
BARRICK GOLD OF NORTH AMERICABARRICK GOLD OF NORTH AMERICA2026 second_quarter$300K2nd Quarter - Report
BARRICK GOLD OF NORTH AMERICABARRICK GOLD OF NORTH AMERICA2026 first_quarter$300K1st Quarter - Report
BARRICK GOLD OF NORTH AMERICABARRICK GOLD OF NORTH AMERICA2025 fourth_quarter$300K4th Quarter - Report
BARRICK GOLD OF NORTH AMERICABARRICK GOLD OF NORTH AMERICA2025 second_quarter$300K2nd Quarter - Report
LEAGUE OF CONSERVATION VOTERSLEAGUE OF CONSERVATION VOTERS2025 second_quarter$290K2nd Quarter - Report
CITIZENS FOR RESPONSIBLE ENERGY SOLUTIONS, INC.CITIZENS FOR RESPONSIBLE ENERGY SOLUTIONS, INC.2025 first_quarter$290K1st Quarter - Report
LEAGUE OF CONSERVATION VOTERSLEAGUE OF CONSERVATION VOTERS2025 fourth_quarter$280K4th Quarter - Report
BARRICK GOLD OF NORTH AMERICABARRICK GOLD OF NORTH AMERICA2025 third_quarter$270K3rd Quarter - Report
LEAGUE OF CONSERVATION VOTERSLEAGUE OF CONSERVATION VOTERS2026 second_quarter$230K2nd Quarter - Report
EARTHJUSTICE ACTIONEARTHJUSTICE ACTION2025 second_quarter$179.6K2nd Quarter - Report
SECURING AMERICA'S FUTURE ENERGY ALLIANCESECURING AMERICA'S FUTURE ENERGY ALLIANCE2025 third_quarter$170K3rd Quarter - Report
LEAGUE OF CONSERVATION VOTERSLEAGUE OF CONSERVATION VOTERS2025 first_quarter$170K1st Quarter - Report

Classification

The Congressional Research Service files S. 544 under Environmental Protection, one of its 31 policy areas, and gives it 3 legislative subjects.

CRS Subjects

CRS assigns every bill one policy area from its 31; S. 544’s is Environmental Protection.

s544/policy-areas.txt
Environmental ProtectionAgriculture and FoodAnimalsArmed Forces and National SecurityArts, Culture, ReligionCivil Rights and Liberties, Minority IssuesCommerceCongressCrime and Law EnforcementEconomics and Public FinanceEducationEmergency ManagementEnergyFamiliesFinance and Financial SectorForeign Trade and International FinanceGovernment Operations and PoliticsHealthHousing and Community DevelopmentImmigrationInternational AffairsLabor and EmploymentLawNative AmericansPublic Lands and Natural ResourcesScience, Technology, CommunicationsSocial WelfareSports and RecreationTaxationTransportation and Public WorksWater Resources Development

Legislative Subjects

S. 544 carries 3 of CRS’s legislative subjects, from Government trust funds to Mining.

s544/subjects.txt
Government trust fundsLand use and conservationMining

Source: congress.gov · legiscan.com