RECLAMATION AND REMEDIATION LIABILITIES (Tables)

9 Months Ended

Sep. 30, 2025

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Reclamation and Remediation Liabilities

Changes in Reclamation and remediation liabilities during the nine months ended September 30, 2025 and 2024, were as follows (in thousands):


	Nine Months Ended September 30, 2025						Nine Months Ended September 30, 2024
	Reclamation		Remediation		Total		Reclamation		Remediation		Total
Balance as of January 1	$	209,923	$	135,914	$	345,837	$	173,819	$	—	$	173,819
Additions (1)		220,974		—		220,974		—		261,674		261,674
Changes in estimate and other (2)		11,856		53,507		65,363		11,054		—		11,054
Expenditures		(4,259)		(13,032)		(17,291)		(1,913)		(125,306)		(127,219)
Accretion expense		18,249		—		18,249		7,243		—		7,243


Balance as of September 30	$	456,743	$	176,389	$	633,132	$	190,203	$	136,368	$	326,571
Less: current portion		(13,228)		(15,079)		(28,307)		(11,765)		(82,345)		(94,110)
Non-current reclamation and remediation liabilities	$	443,515	$	161,310	$	604,825	$	178,438	$	54,023	$	232,461

(1)During the nine months ended September 30, 2025, reclamation changes were primarily comprised of an increase of $221.0 million as a result of the acquisition of CC&V. During the nine months ended September 30, 2024, the Company recorded a remediation liability of $261.7 million as a result of the Çöpler Incident. The remediation activities include movement of the displaced heap leach material out of the Sabırlı Valley and Manganese pit, sloping and stabilization of the heap leach pad in preparation for permanent closure, construction of a permanent storage facility for the displaced heap leach material, and management of surface and ground water in the Sabırlı Valley.

(2)During the nine months ended September 30, 2025, reclamation and remediation at Çöpler increased $9.4 million and $53.5 million, respectively, due to the revised estimate related to the closure of the Çöpler heap leach pad and construction estimate for the permanent storage facility during the second quarter of 2025. At Marigold, reclamation increased by $2.5 million during the nine months ended September 30, 2025, primarily due to additional disturbance and an increase in labor unit cost rates. During the nine months ended September 30, 2024, reclamation changes were comprised of an $11.1 million revision in the timing primarily related to the closure of the heap leach pad as a result of the Çöpler Incident.

The following table includes the components of Reclamation and remediation costs for the three and nine months ended September 30, 2025 and 2024 (in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
		2025		2024		2025		2024
Reclamation adjustments and other	$	—	$	—	$	9,419	$	11,229
Reclamation accretion		7,059		2,414		18,249		7,243
Total reclamation costs		7,059		2,414		27,668		18,472

Remediation adjustments and other		76		—		53,637		261,674

Total remediation costs		76		—		53,637		261,674
Total reclamation and remediation costs	$	7,135	$	2,414	$	81,305	$	280,146