Property, Plant and Equipment

12 Months Ended

Dec. 31, 2012

5. Property, Plant and Equipment

Property, plant and equipment consisted of the following (in thousands):

	December 31,
	2012			2011
Compression equipment, facilities and other fleet assets	$	4,207,772		$	4,226,307
Land and buildings	186,410			176,764
Transportation and shop equipment	261,520			233,689
Other	161,681			144,946
	4,817,383			4,781,706
Accumulated depreciation	(1,975,352		)	(1,847,042		)
Property, plant and equipment, net	$	2,842,031		$	2,934,664

Depreciation expense was $330.1 million, $333.0 million and $364.7 million in 2012, 2011 and 2010, respectively. Assets under construction of $147.0 million and $140.5 million are primarily included in compression equipment, facilities and other fleet assets at December 31, 2012 and 2011, respectively. We capitalized $1.2 million, $1.5 million and $1.7 million of interest related to construction in process during 2012, 2011 and 2010, respectively.

- 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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