Annual report pursuant to Section 13 and 15(d)

PROPERTY, PLANT AND EQUIPMENT (Tables)

v3.6.0.2
PROPERTY, PLANT AND EQUIPMENT (Tables)
 12 Months Ended
Dec. 31, 2016
Property, Plant and Equipment [Abstract]  
Value Of Each Of The Major Classes Of Consolidated Depreciable Assets
The following table indicates the value of each of the major classes of our consolidated depreciable assets as of December 31, 2016 and 2015:
 
(In Millions)
 
December 31,
 
2016
 
2015
Land rights and mineral rights
$
500.5

 
$
500.5

Office and information technology
65.1

 
71.0

Buildings
67.9

 
60.4

Mining equipment
592.2

 
594.0

Processing equipment
552.0

 
516.8

Electric power facilities
49.4

 
46.4

Land improvements
23.5

 
24.8

Asset retirement obligation
19.8

 
87.9

Other
28.1

 
28.2

Construction in-progress
42.8

 
40.3

 
1,941.3

 
1,970.3

Allowance for depreciation and depletion
(956.9
)
 
(911.3
)
 
$
984.4

 
$
1,059.0

Book Value of Land and Mineral Rights Disclosure [Table Text Block]
The net book value of the land rights and mineral rights as of December 31, 2016 and 2015 is as follows:
 
(In Millions)
 
December 31,
 
2016
 
2015
Land rights
$
11.6

 
$
11.6

Mineral rights:

 

Cost
$
488.9

 
$
488.9

Depletion
(112.2
)
 
(108.4
)
Net mineral rights
$
376.7

 
$
380.5