HR 1366
· 119th Congress
· Environmental Protection
Mining Regulatory Clarity Act
Sponsor
Latest action
Read twice. Placed on Senate Legislative Calendar under General Orders. Calendar No. 357.
Action timeline
Every recorded action on this bill, newest first. Stage badges color-code the legislative path.
Mar 17, 2026
other
Read twice. Placed on Senate Legislative Calendar under General Orders. Calendar No. 357.
Dec 18, 2025
floor
Considered under the provisions of rule H. Res. 951. (consideration: CR H6044-6049)
Dec 18, 2025
floor
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.
Dec 18, 2025
floor
DEBATE - The House proceeded with one hour of debate on H.R. 1366.
Dec 18, 2025
floor
The previous question was ordered pursuant to the rule.
Dec 18, 2025
floor
Ms. Leger Fernandez moved to recommit to the Committee on Natural Resources. (text: CR H6049)
Natural Resources Committee
Dec 18, 2025
floor
The previous question on the motion to recommit was ordered pursuant to clause 2(b) of rule XIX.
Dec 18, 2025
floor
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.
Dec 18, 2025
floor
Considered as unfinished business. (consideration: CR H6069-6070)
Dec 18, 2025
floor
On motion to recommit Failed by the Yeas and Nays: 205 - 213 (Roll no. 357).
Natural Resources Committee
Dec 18, 2025
passed
Passed/agreed to in House: On passage Passed by the Yeas and Nays: 219 - 198 (Roll no. 358).
Dec 18, 2025
passed
On passage Passed by the Yeas and Nays: 219 - 198 (Roll no. 358). (text of amendment in the nature of a substitute: CR H6044)
Dec 18, 2025
passed
Motion to reconsider laid on the table Agreed to without objection.
Dec 18, 2025
introduced
Received in the Senate.
Dec 16, 2025
committee
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.
Nov 25, 2025
committee
Reported (Amended) by the Committee on Natural Resources. H. Rept. 119-386.
Natural Resources Committee
Nov 25, 2025
other
Placed on the Union Calendar, Calendar No. 336.
Sep 17, 2025
committee
Subcommittee on Energy and Mineral Resources Discharged
Natural Resources Committee
Sep 17, 2025
committee
Committee Consideration and Mark-up Session Held
Natural Resources Committee
Sep 17, 2025
committee
Ordered to be Reported (Amended) by the Yeas and Nays: 25 - 17.
Natural Resources Committee
Sep 03, 2025
committee
Subcommittee Hearings Held
Energy and Mineral Resources Subcommittee
Aug 29, 2025
committee
Referred to the Subcommittee on Energy and Mineral Resources.
Energy and Mineral Resources Subcommittee
Feb 14, 2025
introduced
Introduced in House
Feb 14, 2025
introduced
Referred to the House Committee on Natural Resources.
Natural Resources Committee
Text versions
Each stage of the bill — official text published by GPO. Click any format to read on congress.gov / govinfo.
CRS summaries
Plain-English summaries written by the Congressional Research Service — neutral, nonpartisan staff who summarize bills as they advance through stages. The authoritative description of what each version of the bill does.
07
Reported to House
Nov 25, 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.
via Congressional Research Service · published through congress.gov
Changelog
ⓘ
How a bill moves through Congress. Each stage produces a new official text. The diff between them shows what changed at that step.
ih / is — Introduced in House / Senate. First filed version.rfh / rfs — Referred to a committee for review.rh / rs — Reported back by the committee to the floor (often with amendments — this is where most language changes happen).pcs / pch — Placed on Calendar for floor consideration.eh / es — Engrossed. Passed by the originating chamber. Text is now what was actually voted on.rdh / rds — Received by the other chamber.eah / eas — Engrossed Amendment. The other chamber passed an amended version.ath / ats — Agreed to. Both chambers settled on the same text.enr — Enrolled. Final reconciled text, sent to the President.pl — Public Law. Signed by the President. It's now law.pp — Public Print. Official printing post-enactment.
Most bills die before eh/es. Going from pcs → enr is the full path through both chambers.
ⓘ
How a bill moves through Congress. Each stage produces a new official text. The diff between them shows what changed at that step.
ih/is— Introduced in House / Senate. First filed version.rfh/rfs— Referred to a committee for review.rh/rs— Reported back by the committee to the floor (often with amendments — this is where most language changes happen).pcs/pch— Placed on Calendar for floor consideration.eh/es— Engrossed. Passed by the originating chamber. Text is now what was actually voted on.rdh/rds— Received by the other chamber.eah/eas— Engrossed Amendment. The other chamber passed an amended version.ath/ats— Agreed to. Both chambers settled on the same text.enr— Enrolled. Final reconciled text, sent to the President.pl— Public Law. Signed by the President. It's now law.pp— Public Print. Official printing post-enactment.
Most bills die before eh/es. Going from pcs → enr is the full path through both chambers.
Line-level diff between text versions of this bill — what actually changed at each legislative stage.
+26
−3
21 unchanged
--- Engrossed (House)
+++ Placed on Calendar (Senate)
@@ -1,11 +1,24 @@
[From the U.S. Government Publishing Office]
-[H.R. 1366 Engrossed in House (EH)]
+[H.R. 1366 Placed on Calendar Senate (PCS)]
<DOC>
+Calendar No. 357
119th CONGRESS
-1st Session
+2d Session
H. R. 1366
+
+_______________________________________________________________________
+
+IN THE SENATE OF THE UNITED STATES
+
+December 18, 2025
+
+Received
+
+March 17, 2026
+
+Read twice and placed on the calendar
_______________________________________________________________________
@@ -194,10 +207,14 @@
Attest:
+KEVIN F. MCCUMBER,
+
Clerk.
+Calendar No. 357
+
119th CONGRESS
-1st Session
+2d Session
H. R. 1366
@@ -207,3 +224,9 @@
To provide for the location of multiple hardrock mining mill sites, to
establish the Abandoned Hardrock Mine Fund, and for other purposes.
+
+_______________________________________________________________________
+
+March 17, 2026
+
+Read twice and placed on the calendar
Lobbying activity
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ZERO EMISSION TRANSPORTATION ASSOCIATION
AUTCAWENVMANSCITAX
2
filings · 2025 Q4
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Cosponsors (2)
Members who signed on to support this bill.