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119th Congress Environmental Protection

H.R. 1366: Mining Regulatory Clarity Act

Passed HouseDec 18, 2025

  1. Introduced (completed)Feb 14, 2025
  2. Passed House (completed)Dec 18, 2025, 219–198
  3. Passed Senate (not reached)
  4. To the President (not reached)
  5. Became law (not reached)

Summary

Reported to House, Nov 25, 2025

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.

Read the full summary

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 Congressional Research Service, Library of Congress.

Key votes

House final vote, Dec 18, 2025

On Passage

Passed 219–198

Yea 219majority 209Nay 198

  • Democrats9 yea, 197 nay
  • Republicans209 yea, 1 nay
  • Independents1 yea, 0 nay

Broke with their party: Eugene Vindman (D-VA), Scott Peters (D-CA), Steven Horsford (D-NV), Adam Gray (D-CA), Marie Gluesenkamp Perez (D-WA), Jared Golden (D-ME), Vicente Gonzalez (D-TX), Henry Cuellar (D-TX) and Jim Costa (D-CA) voted Yea; Brian Fitzpatrick (R-PA) voted Nay

See how all 417 members voted

Showing 433 of 433 members

Yea 219

Republicans (209)

Democrats (9) broke with their party

Independents (1)

Nay 198

Republicans (1) broke with their party

Democrats (197)

Not voting 16

Senate

Not yet voted

Passed the House Dec 18, 2025. Awaiting Senate action.

Roll calls

2 votes on this bill

Showing 2 of 2 roll calls

  • Dec 18, 2025HouseOn PassageFinal passagePassed, yea-nay 219–198
    Roll call 358 tally by party
    PartyYeaNayPresentNot voting
    Democrats919707
    Republicans209109
    Independents1000
    Total219198016

    House roll call 358: On Passage. Passed.

    10 crossed party lines: 9 Democrats, 1 Republican

    How each member voted (433)
  • Dec 18, 2025HouseMotion to recommitFailed, yea-nay 205–213
    Roll call 357 tally by party
    PartyYeaNayPresentNot voting
    Democrats205107
    Republicans021108
    Independents0100
    Total205213015

    House roll call 357: On Motion to Recommit. Failed.

    1 crossed party lines: 1 Democrat

    How each member voted (433)

Amendments

0 offered

No amendments were offered to this bill.

Cosponsors

2

Bipartisan support.

Who scored on this bill

142 points earned
  1. 1Mark Amodei R-NV SponsorDrew cross-party cosponsors, introduced, marked up, reported, passed House5 events+68
  2. 2Steven Horsford D-NV1 maverick vote; cosponsored; cosponsored bill passed3 events+10
  3. 3André Carson D-IN1 maverick vote1 event+6
  4. 3Jim Costa D-CA1 maverick vote1 event+6
  5. 3Henry Cuellar D-TX1 maverick vote1 event+6
See all scorers and every scoring event

Introductions and cosponsorships count toward weekly caps and show no points.

Other bills by Mark Amodei

History

  1. Dec 18, 2025Passed the House, 219–198.
  2. Feb 14, 2025Introduced in the House by Mark Amodei.
Show the full action history (24 actions)
  1. Mar 17, 2026Read twice. Placed on Senate Legislative Calendar under General Orders. Calendar No. 357.
  2. Dec 18, 2025Considered under the provisions of rule H. Res. 951. (consideration: CR H6044-6049)
  3. Dec 18, 2025Rule 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.
  4. Dec 18, 2025DEBATE - The House proceeded with one hour of debate on H.R. 1366.
  5. Dec 18, 2025The previous question was ordered pursuant to the rule.
  6. Dec 18, 2025Ms. Leger Fernandez moved to recommit to the Committee on Natural Resources. (text: CR H6049)
  7. Dec 18, 2025The previous question on the motion to recommit was ordered pursuant to clause 2(b) of rule XIX.
  8. Dec 18, 2025POSTPONED 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.
  9. Dec 18, 2025Considered as unfinished business. (consideration: CR H6069-6070)
  10. Dec 18, 2025On motion to recommit Failed by the Yeas and Nays: 205 - 213 (Roll no. 357).
  11. Dec 18, 2025Passed/agreed to in House: On passage Passed by the Yeas and Nays: 219 - 198 (Roll no. 358).
  12. Dec 18, 2025On passage Passed by the Yeas and Nays: 219 - 198 (Roll no. 358). (text of amendment in the nature of a substitute: CR H6044)
  13. Dec 18, 2025Motion to reconsider laid on the table Agreed to without objection.
  14. Dec 18, 2025Received in the Senate.
  15. Dec 16, 2025Rules 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. Nov 25, 2025Reported (Amended) by the Committee on Natural Resources. H. Rept. 119-386.
  17. Nov 25, 2025Placed on the Union Calendar, Calendar No. 336.
  18. Sep 17, 2025Subcommittee on Energy and Mineral Resources Discharged
  19. Sep 17, 2025Committee Consideration and Mark-up Session Held
  20. Sep 17, 2025Ordered to be Reported (Amended) by the Yeas and Nays: 25 - 17.
  21. Sep 3, 2025Subcommittee Hearings Held
  22. Aug 29, 2025Referred to the Subcommittee on Energy and Mineral Resources.
  23. Feb 14, 2025Introduced in House
  24. Feb 14, 2025Referred to the House Committee on Natural Resources.