PROPERTY, PLANT AND EQUIPMENT

9 Months Ended

Sep. 30, 2019

Property, Plant and Equipment [Abstract]

PROPERTY, PLANT AND EQUIPMENT

NOTE 5 - PROPERTY, PLANT AND EQUIPMENT

The following table indicates the carrying value of each of the major classes of our depreciable assets:

	(In Millions)
	September 30, 2019			December 31, 2018
Land rights and mineral rights	$	549.7		$	549.6
Office and information technology	72.9			70.0
Buildings	101.2			87.2
Mining equipment	577.0			548.5
Processing equipment	755.5			645.8
Electric power facilities	58.7			58.7
Land improvements	23.8			23.8
Asset retirement obligation	14.8			14.8
Other	29.2			25.2
Construction-in-progress	668.9			284.8
	2,851.7			2,308.4
Allowance for depreciation and depletion	(1,081.8		)	(1,022.4		)
	$	1,769.9		$	1,286.0

We recorded capitalized interest into property, plant and equipment of $7.0 million and $16.9 million for the three and nine months ended September 30, 2019, respectively, and $1.8 million and $3.9 million for the three and nine months ended September 30, 2018, respectively.