Quarterly report pursuant to Section 13 or 15(d)

PROPERTY, PLANT AND EQUIPMENT

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PROPERTY, PLANT AND EQUIPMENT
 6 Months Ended
Jun. 30, 2017
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT
NOTE 4 - PROPERTY, PLANT AND EQUIPMENT
The following table indicates the value of each of the major classes of our consolidated depreciable assets as of June 30, 2017 and December 31, 2016:
 
(In Millions)
 
June 30,
2017
 
December 31,
2016
Land rights and mineral rights
$
500.7

 
$
500.5

Office and information technology
66.0

 
65.1

Buildings
71.8

 
67.9

Mining equipment
600.1

 
592.2

Processing equipment
621.5

 
552.0

Electric power facilities
54.0

 
49.4

Land improvements
23.8

 
23.5

Asset retirement obligation
19.7

 
19.8

Other
28.7

 
28.1

Construction in-progress
19.8

 
42.8

 
2,006.1

 
1,941.3

Allowance for depreciation and depletion
(1,007.0
)
 
(956.9
)
 
$
999.1

 
$
984.4


We recorded depreciation and depletion expense of $21.2 million and $43.8 million in the Statements of Unaudited Condensed Consolidated Operations for the three and six months ended June 30, 2017, respectively. This compares with depreciation and depletion expense of $25.7 million and $59.5 million for the three and six months ended June 30, 2016, respectively.