Quarterly report pursuant to Section 13 or 15(d)

PROPERTY, PLANT AND EQUIPMENT

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PROPERTY, PLANT AND EQUIPMENT
 9 Months Ended
Sep. 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 September 30, 2017 and December 31, 2016:
 
(In Millions)
 
September 30,
2017
 
December 31,
2016
Land rights and mineral rights
$
500.7

 
$
500.5

Office and information technology
66.2

 
65.1

Buildings
80.0

 
67.9

Mining equipment
585.4

 
592.2

Processing equipment
607.9

 
552.0

Electric power facilities
57.0

 
49.4

Land improvements
23.7

 
23.5

Asset retirement obligation
19.6

 
19.8

Other
30.4

 
28.1

Construction in-progress
35.4

 
42.8

 
2,006.3

 
1,941.3

Allowance for depreciation and depletion
(1,012.5
)
 
(956.9
)
 
$
993.8

 
$
984.4


We recorded depreciation and depletion expense of $21.0 million and $64.8 million in the Statements of Unaudited Condensed Consolidated Operations for the three and nine months ended September 30, 2017, respectively. This compares with depreciation and depletion expense of $25.6 million and $85.1 million for the three and nine months ended September 30, 2016, respectively.