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Property, plant and equipment

12 Months Ended

Mar. 31, 2012

Property, plant and equipment [Abstract]

Property, plant and equipment

13. Property, plant and equipment


March 31, 2012		Cost						Accumulated Deprecation						Net Book Value
Heavy equipment			$347,699						$124,982						$222,717
Major component parts in use			74,444						28,741						45,703
Other equipment			35,736						17,017						18,719
Licensed motor vehicles			27,120						19,775						7,345
Office and computer equipment			13,438						8,977						4,461
Buildings			4,355						3,235						1,120
Land			281						–						281
Leasehold improvements			6,620						2,232						4,388
Assets under capital lease			16,579						8,538						8,041
			$526,272						$213,497						$312,775


March 31, 2011		Cost						Accumulated Deprecation						Net Book Value
Heavy equipment			$341,734						$108,051						$233,683
Major component parts in use			47,248						15,593						31,655
Other equipment			31,877						14,136						17,741
Licensed motor vehicles			21,368						16,592						4,776
Office and computer equipment			12,128						5,899						6,229
Buildings			21,657						8,176						13,481
Land			281						–						281
Leasehold improvements			9,422						3,856						5,566
Assets under capital lease			19,506						11,054						8,452
			$505,221						$183,357						$321,864

Assets under capital lease are comprised predominately of licensed motor vehicles.

During the year ended March 31, 2012, additions to property, plant and equipment included $7,215 of assets that were acquired by means of capital leases (2011 – $427; 2010 – $1,523). Depreciation of equipment under capital lease of $2,005 (2011 – $2,723; 2010 – $4,081) was included in depreciation expense.

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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