Quarterly report pursuant to Section 13 or 15(d)

PROPERTY, PLANT AND EQUIPMENT

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PROPERTY, PLANT AND EQUIPMENT
 3 Months Ended
Mar. 31, 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 March 31, 2017 and December 31, 2016:
 
(In Millions)
 
March 31,
2017
 
December 31,
2016
Land rights and mineral rights
$
500.7

 
$
500.5

Office and information technology
65.8

 
65.1

Buildings
68.4

 
67.9

Mining equipment
595.8

 
592.2

Processing equipment
558.9

 
552.0

Electric power facilities
49.6

 
49.4

Land improvements
23.7

 
23.5

Asset retirement obligation
19.8

 
19.8

Other
28.4

 
28.1

Construction in-progress
69.8

 
42.8

 
1,980.9

 
1,941.3

Allowance for depreciation and depletion
(985.9
)
 
(956.9
)
 
$
995.0

 
$
984.4


We recorded depreciation and depletion expense of $22.6 million and $33.8 million in the Statements of Unaudited Condensed Consolidated Operations for the three months ended March 31, 2017 and March 31, 2016, respectively.