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PROPERTY, PLANT AND EQUIPMENT (Tables)
12 Months Ended
Dec. 31, 2021
PROPERTY, PLANT AND EQUIPMENT.  
Net Book Value of Property, Plant and Equipment

Net Book Value of Property Plant and Equipment at December 31, 2021

(thousands of dollars)

    

Alabama

    

Corporate

    

Total

Mineral rights and properties

$

8,972

$

$

8,972

Other property, plant and equipment

 

4,462

 

28

 

4,490

Construction in progress

1,017

1,017

Total

$

14,451

$

28

$

14,479

Net Book Value of Property Plant and Equipment at December 31, 2020

(thousands of dollars)

    

Alabama

    

Corporate

    

Total

Mineral rights and properties

$

8,972

$

$

8,972

Other property, plant and equipment

 

 

13

 

13

Construction in progress

Total

$

8,972

$

13

$

8,985

Impairment Charges

For the year ended December 31,

    

    

2020

(thousands of dollars)

Kingsville Dome project

$

101

Rosita project

 

1,161

Cebolleta/Juan Tafoya project

 

3,938

Total Impairment

$

5,200