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Property, Plant and Equipment

12 Months Ended

Dec. 31, 2011

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

5. Property, Plant and Equipment

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


		December 31,
		2011				2010
Compression equipment, facilities and other fleet assets		$	4,309,386			$	4,302,483
Land and buildings			176,782				166,273
Transportation and shop equipment			244,226				225,073
Other			151,939				142,770

			4,882,333				4,836,599
Accumulated depreciation			(1,877,881	)			(1,743,947	)

Property, plant and equipment, net		$	3,004,452			$	3,092,652

Depreciation expense was $341.3 million, $373.3 million and $322.3 million in 2011, 2010 and 2009, respectively. Assets under construction of $143.1 million and $134.6 million are primarily included in compression equipment, facilities and other fleet assets at December 31, 2011 and 2010, respectively. We capitalized $1.5 million, $1.7 million and $4.1 million of interest related to construction in process during 2011, 2010 and 2009, respectively.

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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