H.R. 1366

119th Congress

Reported

Mining Regulatory Clarity Act

Sponsored byRepublican:Rep. Amodei, Mark E. [R-NV-2]NV· Introduced 14 February 2025
Open on Congress.gov

2

Cosponsors

26

Actions

1

Amendments

1

Committees

—

Since introduced

Introduced
Committee
Passed Chamber
Passed Both
Enacted
Step 1 of 0
Latest action

Read twice. Placed on Senate Legislative Calendar under General Orders. Calendar No. 357.

17 March 2026·4 months ago

Summary

Reported to House · Updated 16 December 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.

Timeline

26 actions

  1. Read twice. Placed on Senate Legislative Calendar under General Orders. Calendar No. 357.

    17 March 2026 · Calendars

  2. The previous question on the motion to recommit was ordered pursuant to clause 2(b) of rule XIX.

    18 December 2025 · Floor

  3. DEBATE - The House proceeded with one hour of debate on H.R. 1366.

    18 December 2025 · Floor

  4. Ms. Leger Fernandez moved to recommit to the Committee on Natural Resources. (text: CR H6049)

    18 December 2025 · Floor

  5. On motion to recommit Failed by the Yeas and Nays: 205 - 213 (Roll no. 357).

    18 December 2025 · Floor

  6. Received in the Senate.

    18 December 2025 · IntroReferral

  7. Considered under the provisions of rule H. Res. 951. (consideration: CR H6044-6049)

    18 December 2025 · Floor

  8. On passage Passed by the Yeas and Nays: 219 - 198 (Roll no. 358). (text of amendment in the nature of a substitute: CR H6044)

    18 December 2025 · Floor

  9. POSTPONED PROCEEDINGS - At the conclusion of debate on H.R. 1366, the Chair put the question on motion to recommit and by voice vote announced the noes had prevailed. Ms. Leger Fernandez demanded the yeas and nays and the Chair postponed further proceedings until a time to be announced.

    18 December 2025 · Floor

  10. Considered as unfinished business. (consideration: CR H6069-6070)

    18 December 2025 · Floor

  11. Rule provides for consideration of H.R. 4776, H.R. 1366, H.R. 845, H.R. 3616, H.R. 3632 and H.R. 4371. The resolution provides for consideration of H.R. 4776, under a structured rule and H.R. 1366, H.R. 845, H.R. 3616, H.R. 3632, and H.R. 4371 under a closed rule. The resolution provides one motion to recommit on each bill.

    18 December 2025 · Floor

  12. Motion to reconsider laid on the table Agreed to without objection.

    18 December 2025 · Floor

  13. The previous question was ordered pursuant to the rule.

    18 December 2025 · Floor

  14. Passed/agreed to in House: On passage Passed by the Yeas and Nays: 219 - 198 (Roll no. 358).

    18 December 2025 · Floor

  15. Rules Committee Resolution H. Res. 951 Reported to House. Rule provides for consideration of H.R. 4776, H.R. 1366, H.R. 845, H.R. 3616, H.R. 3632 and H.R. 4371. The resolution provides for consideration of H.R. 4776, under a structured rule and H.R. 1366, H.R. 845, H.R. 3616, H.R. 3632, and H.R. 4371 under a closed rule. The resolution provides one motion to recommit on each bill.

    16 December 2025 · Floor

  16. Placed on the Union Calendar, Calendar No. 336.

    25 November 2025 · Calendars

  17. Reported (Amended) by the Committee on Natural Resources. H. Rept. 119-386.

    25 November 2025 · Committee

  18. Reported (Amended) by the Committee on Natural Resources. H. Rept. 119-386.

    25 November 2025 · Committee

  19. Ordered to be Reported (Amended) by the Yeas and Nays: 25 - 17.

    17 September 2025 · Committee

  20. Committee Consideration and Mark-up Session Held

    17 September 2025 · Committee

6 earlier actionsView all on Congress.gov

Sponsorship

2 cosponsors

Sponsor

Republican:Rep. Amodei, Mark E. [R-NV-2]NV

Cosponsors

  • Democrat150%
  • Republican150%

Classification

Policy area

Environmental Protection

Legislative subjects

Government trust fundsLand use and conservationMining

Committees

1

  • Natural Resources Committee

    House · Standing

    • Referred To14 Feb 2025
    • Discharged from17 Sept 2025
    • Markup By17 Sept 2025
    • Reported By25 Nov 2025
    • Unknown18 Dec 2025
    • Unknown18 Dec 2025

    • Energy and Mineral Resources Subcommittee

      • Referred to29 Aug 2025
      • Hearings By (subcommittee)3 Sept 2025

Reports

Cosponsor momentum

Cumulative over time

Cosponsors grew from 1 on 14 February 2025 to 2 on 16 September 2025.

Amendments

1

  • HAMDT 141Agreed

    18 December 2025

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