H.R. 1366Mining Regulatory Clarity Act

2 recorded actionsWhat the measure does Read on Congress.gov

Sponsor: Mark E. Amodei [R-NV-02]
Cosponsors: 2 · 1 Democrat · 1 Republican
Policy area: Environmental Protection
Committee: Natural Resources Committee
Latest action: Mar 17, 2026 · Read twice. Placed on Senate Legislative Calendar under General Orders. Calendar No. 357.

IntroducedFeb 14, 2025
Passed the HouseDec 18, 2025
Passed the SenateNot yet reached
Sent to the PresidentNot yet reached
Became lawNot yet reached

What the measure doesCRS summary

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.

Written by the nonpartisan Congressional Research Service, describing H.R. 1366 as reported to House on Nov 25, 2025. It is not the text of the measure; a later amendment may have changed what it does.

Roll calls on H.R. 13662 roll calls on this measure

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Dec 18, 2025Each bar: ✓ Yea from the bottom, ✕ Nay aboveDec 18, 2025

How every member votedHouse roll call 358

House Dec 18, 2025 · the primary vote

On Passage

Mining Regulatory Clarity Act

Passed

219 Yea 198 Nay 16 not voting

Party-line vote 10 of 417 voting members broke with their own party: 9 Democrats, 1 Republican.

Open the official roll call

How the chamber split

One dot per member. Select a seat or a bar to filter the list.

DemocratsIndependentsRepublicansFilled: YeaRing: NayGrey: not voting or present

By party select a segment to filter

All members433 members

Democratic213 members

Independent1 member

Republican219 members

marks half of the votes cast. A party’s majority is the side most of its voting members took.

Cosponsors2 · 1 Democrat · 1 Republican

Signing on is not a vote: a member can cosponsor H.R. 1366 and vote against it. 1 signed when it was filed.

DSteven Horsford [D-NV-04]Original2026 profile

RNicholas J. Begich III [R-AK-00]Joined Sep 16, 20252026 profile

Who lobbied on H.R. 136620 organizations

Organizations that named H.R. 1366 in a lobbying disclosure. Only those that cited the bill by number appear, so this is a floor, not a full list.

NATIONAL MINING ASSOCIATIONfiled by NATIONAL MINING ASSOCIATION, HOLLAND & KNIGHT LLP

Chemicals/Chemical Industry · Budget/Appropriations · Clean Air and Water (quality) · Natural Resources +8 more12 filings · 3rd Quarter (July 1 - Sep 30) 2026Filing

SECURING AMERICA'S FUTURE ENERGY ALLIANCE

Energy/Nuclear · Natural Resources · Financial Institutions/Investments/Securities · Foreign Relations +7 more8 filings · 2nd Quarter (Apr 1 - June 30) 2026Filing

BARRICK GOLD OF NORTH AMERICA

Natural Resources · Real Estate/Land Use/Conservation · Environment/Superfund7 filings · 3rd Quarter (July 1 - Sep 30) 2026Filing

BARRICK GOLD OF NORTH AMERICA INC.filed by CASSIDY & ASSOCIATES, INC.

Real Estate/Land Use/Conservation7 filings · 3rd Quarter (July 1 - Sep 30) 2026Filing

KINROSS GOLD U.S.A., INC.filed by HOLLAND & KNIGHT LLP

Natural Resources7 filings · 3rd Quarter (July 1 - Sep 30) 2026Filing

NEWMONT MINING CORPORATIONfiled by CASSIDY & ASSOCIATES, INC.

Real Estate/Land Use/Conservation · Natural Resources · Environment/Superfund7 filings · 3rd Quarter (July 1 - Sep 30) 2026Filing

RACY & ASSOCIATES (ON BEHALF OF PIMA COUNTY)filed by CAPITOL STRATEGIES, LLC

Natural Resources · Transportation · Agriculture · Defense +2 more7 filings · 3rd Quarter (July 1 - Sep 30) 2026Filing

EARTHJUSTICE ACTION

Agriculture · Energy/Nuclear · Government Issues · Natural Resources +5 more6 filings · 3rd Quarter (July 1 - Sep 30) 2026Filing

IONEER USA CORPORATIONfiled by MARCUS G. FAUST, PC

Natural Resources · Budget/Appropriations5 filings · 3rd Quarter (July 1 - Sep 30) 2026Filing

JINDALEE LITHIUM LIMITEDfiled by CASSIDY & ASSOCIATES, INC.

Natural Resources · Real Estate/Land Use/Conservation · Defense5 filings · 3rd Quarter (July 1 - Sep 30) 2026Filing

108 disclosures name this measure. Retrieved from LDA.gov on 2026-10-25. Senate Office of Public Records cannot vouch for the data or analyses derived from these data after the data have been retrieved from LDA.gov.