Quarterly report pursuant to Section 13 or 15(d)

Asset Retirement Obligations (Tables)

v3.21.2
Asset Retirement Obligations (Tables)
9 Months Ended
Sep. 30, 2021
Notes Tables  
Schedule of Change in Asset Retirement Obligation [Table Text Block]

​

​

​

​

​

Balances, December 31, 2020

​

$

392,704

Liabilities settled

​

 

(19,744)

Accretion of discount

​

 

17,368

Liabilities incurred and assumed through acquisition

​

 

417

Revisions of estimated liabilities

​

 

17,129

Balances, September 30, 2021

​

 

407,874

Less current portion

​

 

(27,545)

Long-term

​

$

380,329