Annual report pursuant to Section 13 and 15(d)

PROPERTY, PLANT AND EQUIPMENT (Tables)

v3.10.0.1
PROPERTY, PLANT AND EQUIPMENT (Tables)
12 Months Ended
Dec. 31, 2018
Property, Plant and Equipment [Abstract]  
Value Of Each Of The Major Classes Of Consolidated Depreciable Assets
The following table indicates the carrying value of each of the major classes of our consolidated depreciable assets:
 
(In Millions)
 
December 31,
 
2018
 
2017
Land rights and mineral rights
$
549.6

 
$
549.6

Office and information technology
70.0

 
65.8

Buildings
87.2

 
85.2

Mining equipment
548.5

 
533.9

Processing equipment
645.8

 
610.9

Electric power facilities
58.7

 
56.9

Land improvements
23.8

 
23.7

Asset retirement obligation
14.8

 
16.9

Other
25.2

 
25.2

Construction-in-progress
284.8

 
32.6

 
2,308.4

 
2,000.7

Allowance for depreciation and depletion
(1,022.4
)
 
(966.9
)
 
$
1,286.0

 
$
1,033.8

Book Value of Land and Mineral Rights Disclosure [Table Text Block]
The net book value of the land rights and mineral rights is as follows:
 
(In Millions)
 
December 31,
 
2018
 
2017
Land rights
$
12.4

 
$
12.4

Mineral rights:

 

Cost
$
537.2

 
$
537.2

Depletion
(126.5
)
 
(119.1
)
Net mineral rights
$
410.7

 
$
418.1