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ASSET RETIREMENT OBLIGATION (Tables)
12 Months Ended
Dec. 31, 2020
ASSET RETIREMENT OBLIGATION  
Schedule of details the asset retirement obligation

The information below details the asset retirement obligation for the years ended December 31, 2020 and 2019 as follows (in thousands):

December 31, 

    

2020

    

2019

Beginning balance at January 1,

$

5,759

$

6,092

Asset retirement obligation

 

771

 

850

Settlement of asset retirement obligation

 

(1,375)

 

Retirement cost revaluation

 

(1,235)

 

(1,486)

Accretion expense

 

217

 

303

Ending balance at December 31,

$

4,137

$

5,759