​

​

Six Months Ended June 30, 

​

  ​ ​ ​

2026

  ​ ​ ​

2025

Contingent decommissioning obligations, beginning of period

​

$

36,157

​

$

22,551

Liabilities settled

​

(2,891)

​

(1,439)

Accrual for additional estimated liabilities

​

—

​

13,658

Contingent decommissioning obligations, end of period

​

​

33,266

​

​

34,770

Less: Current portion

​

(8,717)

​

(759)

Long-term

​

$

24,549

​

$

34,011