Annual report [Section 13 and 15(d), not S-K Item 405]

ACCRUED CLOSURE COSTS AND ARO

ACCRUED CLOSURE COSTS AND ARO

12 Months Ended

Dec. 31, 2024

Asset Retirement Obligation Disclosure [Abstract]

NOTE 11

ACCRUED CLOSURE COSTS AND ARO

Accrued closure costs represent our estimated environmental liability to clean up our fixed-based regulated facilities as required by our permits, in the event of closure. Changes to reported closure liabilities (current and long-term) for the years ended December 31, 2024, and 2023, were as follows:

Amounts in thousands
Balance as of December 31, 2022	$	7,966
Accretion expense		462
Spending		(298	)
Balance as of December 31, 2023	$	8,130
Accretion expense		433
Spending		(223	)
Balance as of December 31, 2024	$	8,340

As of December 31, 2024, and 2023, the current portion of the closure liabilities totaled approximately $50,000 and $79,000, respectively, which reflect closure liabilities for our EWOC facility. The spending made in each of the years 2024 and 2023 was primarily for our EWOC facility.

The reported closure asset or ARO, is reported as a component of “Net Property and equipment” in the Consolidated Balance Sheets as of December 31, 2024, and 2023 with the following activity for the years ended December 31, 2024, and 2023:

Amounts in thousands
Balance as of December 31, 2022	$	4,101
Amortization of closure and post-closure asset		(878	)
Balance as of December 31, 2023	$	3,223
Amortization of closure and post-closure asset		(202	)
Balance as of December 31, 2024	$	3,021