ÐÇ¿Õ´«Ã½

Annual report pursuant to Section 13 and 15(d)

PROPERTY, PLANT AND EQUIPMENT (Tables)

v3.19.3.a.u2
PROPERTY, PLANT AND EQUIPMENT (Tables)
12 Months Ended
Dec. 31, 2019
Property, Plant and Equipment [Abstract] Ìý
Property Plant and Equipment [Table Text Block] Depreciation and depletion is recorded over the following estimated useful lives:
Asset Class
Ìý
Basis
Ìý
Life
ÌýLand rights and mineral rights
Ìý
Units of production
Ìý
Life of mine
Office and information technology
Ìý
Straight line
Ìý
3 to 15 years
Buildings
Ìý
Straight line
Ìý
45 years
Mining equipment
Ìý
Straight line/Double declining balance
Ìý
3ÌýtoÌý20Ìýyears
Processing equipment
Ìý
Straight line
Ìý
10 to 45 years
Electric power facilities
Ìý
Straight line
Ìý
10 to 45 years
Land improvements
Ìý
Straight line
Ìý
20 to 45 years
Asset retirement obligation
Ìý
Straight line
Ìý
Life of mine

The following table indicates the carrying value of each of the major classes of our consolidated property, plant and equipment:
Ìý
(In Millions)
Ìý
December 31,
Ìý
2019
Ìý
2018
Land rights and mineral rights
$
549.7

Ìý
$
549.6

Office and information technology
71.9

Ìý
70.0

Buildings
157.8

Ìý
87.2

Mining equipment
581.9

Ìý
548.5

Processing equipment
791.8

Ìý
645.8

Electric power facilities
81.9

Ìý
58.7

Land improvements
32.5

Ìý
23.8

Asset retirement obligation
1.7

Ìý
14.8

Other
27.9

Ìý
25.2

Construction-in-progress
730.3

Ìý
284.8

Ìý
3,027.4

Ìý
2,308.4

Allowance for depreciation and depletion
(1,098.4
)
Ìý
(1,022.4
)
Ìý
$
1,929.0

Ìý
$
1,286.0


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:
Ìý
(In Millions)
Ìý
December 31,
Ìý
2019
Ìý
2018
Land rights
$
12.4

Ìý
$
12.4

Mineral rights:

Ìý

Cost
$
537.3

Ìý
$
537.2

Depletion
(134.1
)
Ìý
(126.5
)
Net mineral rights
$
403.2

Ìý
$
410.7