Property, Plant and Equipment

12 Months Ended

Dec. 31, 2012

8. Property, Plant and Equipment

Property, plant and equipment, net consisted of the following at December 31 (in thousands):

	2012			2011

Land, surface rights, and mineral rights(1)	$	1,699,148		$	1,315,991
Mining equipment		843,262			814,177
Construction in progress		18,277			18,616
Other equipment		65,588			61,465
Buildings and improvements		71,422			71,246

Total		2,697,698			2,281,495
Less: accumulated depreciation and depletion		(1,019,404	)		(931,360	)

Property, plant and equipment, net	$	1,678,294		$	1,350,135

(1): Includes mineral rights of $963.1 million and $743.2 million at December 31, 2012 and 2011, respectively, attributable to areas where we were not yet engaged in mining operations and, therefore, the mineral rights were not being depleted.

During the years ended December 31, interest costs capitalized on mine development and construction projects totaled the following (in thousands):

		2012			2011			2010

Interest costs capitalized		$	41,975		$	44,883		$	24,487

- Definition

The entire disclosure for long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. This disclosure may include property plant and equipment accounting policies and methodology, a schedule of property, plant and equipment gross, additions, deletions, transfers and other changes, depreciation, depletion and amortization expense, net, accumulated depreciation, depletion and amortization expense and useful lives, income statement disclosures, assets held for sale and public utility disclosures.

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