Earnings Per Share (Tables)

12 Months Ended

Oct. 02, 2011

Earnings Per Share

Schedule of number of weighted-average shares used to compute basic and diluted EPS

		Fiscal Year Ended
		October 2, 2011		October 3, 2010		September 27, 2009
		(in thousands, except per share data)
Net income attributable to Tetra Tech		$	90,039	$	76,819	$	87,028
	Weighted-average common shares outstanding – basic		62,053		61,430		60,135
	Effect of diluted stock options and unvested restricted stock		722		657		859
	Weighted-average common stock outstanding – diluted		62,775		62,087		60,994
Earnings per share attributable to Tetra Tech:
	Basic	$	1.45	$	1.25	$	1.45
	Diluted	$	1.43	$	1.24	$	1.43