Consolidated Balance Sheets (USD $) In Thousands	Oct. 02, 2011	Oct. 03, 2010
CURRENT ASSETS:
Cash and cash equivalents	$ 90,494	$ 220,933
Accounts receivable - net	657,179	566,642
Prepaid expenses and other current assets	84,612	49,889
Income taxes receivable	6,817	7,249
Total current assets	839,102	844,713
PROPERTY AND EQUIPMENT - NET	77,536	79,383
INVESTMENTS IN AND ADVANCES TO UNCONSOLIDATED JOINT VENTURES	3,454	140
GOODWILL	569,414	394,422
INTANGIBLE ASSETS - NET	81,053	45,995
OTHER ASSETS	23,429	17,036
TOTAL ASSETS	1,593,988	1,381,689
CURRENT LIABILITIES:
Accounts payable	164,819	166,450
Accrued compensation	110,937	93,243
Billings in excess of costs on uncompleted contracts	84,754	79,401
Deferred income taxes	22,870	21,851
Current portion of long-term debt	2,556	5,002
Contingent earn-out liabilities	64,119	10,513
Other current liabilities	81,654	90,747
Total current liabilities	531,709	467,207
DEFERRED INCOME TAXES	25,394	12,506
LONG-TERM DEBT	144,868	122,510
OTHER LONG-TERM LIABILITIES	36,767	31,333
COMMITMENTS AND CONTINGENCIES
EQUITY:
Preferred stock - Authorized, 2,000 shares of $0.01 par value; no shares issued and outstanding at October 2, 2011 and October 3, 2010
Common stock - Authorized, 150,000 shares of $0.01 par value; issued and outstanding, 62,495 and 61,755 shares at October 2, 2011 and October 3, 2010, respectively	625	618
Additional paid-in capital	399,420	368,865
Accumulated other comprehensive income	4,754	18,763
Retained earnings	449,926	359,887
Tetra Tech stockholders' equity	854,725	748,133
Noncontrolling interests	525
TOTAL EQUITY	855,250	748,133
TOTAL LIABILITIES AND EQUITY	$ 1,593,988	$ 1,381,689