H.R. 1366 · 119th Congress · House

Mining Regulatory Clarity Act

In Congress· Read twice. Placed on Senate Legislative Calendar under General Orders. Calendar No. 357.
Introduced
Feb 14, 25
Passed House
Dec 18, 25
Passed Senate
Pending
Sent to President
Pending
Signed into Law
Pending

Executive Summary

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.

Action Timeline

28
  1. MAR 17, 2026Senate

    Read twice

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

  2. DEC 18, 2025House floor actions

    On passage Passed by the Yeas and Nays

    Roll Call #358

    219 - 198 (Roll no. 358). (text of amendment in the nature of a substitute: CR H6044)

    219Yea
    198Nay
    0NV
  3. DEC 18, 2025House floor actions

    Considered as unfinished business

    (consideration: CR H6069-6070)

    6069Yea
    6070Nay
    0NV
  4. DEC 18, 2025House floor actions

    Ms

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

  5. DEC 18, 2025House floor actions

    Considered under the provisions of rule H

    Res. 951. (consideration: CR H6044-6049)

    6044Yea
    6049Nay
    0NV
  6. DEC 18, 2025Senate

    Received in the Senate.

  7. DEC 18, 2025House floor actions

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

  8. DEC 18, 2025House floor actions

    On passage Passed by the Yeas and Nays

    Roll Call #358

    219 - 198 (Roll no. 358).

    219Yea
    198Nay
    0NV
  9. DEC 18, 2025Library of Congress

    Passed/agreed to in House

    Roll Call #358

    On passage Passed by the Yeas and Nays: 219 - 198 (Roll no. 358).

    219Yea
    198Nay
    0NV
  10. DEC 18, 2025House floor actions

    On motion to recommit Failed by the Yeas and Nays

    Roll Call #357

    205 - 213 (Roll no. 357).

    205Yea
    213Nay
    0NV
  11. DEC 18, 2025House floor actions

    Considered as unfinished business.

  12. DEC 18, 2025House floor actions

    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.

  13. DEC 18, 2025House floor actions

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

  14. DEC 18, 2025House floor actions

    Ms

    Leger Fernandez moved to recommit to the Committee on Natural Resources.

  15. DEC 18, 2025House floor actions

    The previous question was ordered pursuant to the rule.

  16. DEC 18, 2025House floor actions

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

  17. DEC 18, 2025House floor actions

    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. DEC 18, 2025House floor actions

    Considered under the provisions of rule H. Res. 951.

  19. DEC 16, 2025House floor actions

    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.

  20. NOV 25, 2025House floor actions

    Placed on the Union Calendar, Calendar No. 336.

  21. NOV 25, 2025Library of Congress

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

    119Yea
    386Nay
    0NV
  22. SEP 17, 2025House committee actions

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

    25Yea
    17Nay
    0NV
  23. SEP 17, 2025House committee actions

    Committee Consideration and Mark-up Session Held

  24. SEP 17, 2025House committee actions

    Subcommittee on Energy and Mineral Resources Discharged

  25. SEP 03, 2025House committee actions

    Subcommittee Hearings Held

  26. AUG 29, 2025House committee actions

    Referred to the Subcommittee on Energy and Mineral Resources.

  27. FEB 14, 2025House floor actions

    Referred to the House Committee on Natural Resources.

  28. FEB 14, 2025Library of Congress

    Introduced in House

Committees

3

Natural Resources Committee

hsii00

Referred: Dec 18, 2025

Discharged: Sep 17, 2025

Discharged

Natural Resources Committee

hsii00

Referred: Nov 25, 2025

Discharged: Sep 17, 2025

Discharged

Natural Resources Committee

hsii00

Referred: Sep 17, 2025

Discharged: Sep 17, 2025

Discharged