Annual report pursuant to Section 13 and 15(d)

Note 6 - Asset Retirement Obligations (Tables)

v3.20.4
Note 6 - Asset Retirement Obligations (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Change in Asset Retirement Obligation [Table Text Block]
   

Year Ended December 31,

 
   

2020

   

2019

 

Asset retirement obligations, beginning of period

  $ 355,594     $ 310,137  

Liabilities settled

    (3,339 )     (11,443 )

Accretion of discount

    22,521       19,460  

Liabilities incurred and assumed through acquisition

    4,860       29,887  

Revisions of estimated liabilities (1)

    13,068       7,553  

Asset retirement obligations, end of period

    392,704       355,594  

Less current portion

    17,188       21,991  

Long-term

  $ 375,516     $ 333,603