PASADENA, Calif.--(BUSINESS WIRE)--Tetra Tech, Inc. (NASDAQ: TTEK) today announced results for the fiscal 2015 first quarter ended December 28, 2014. First Quarter Results Revenue in the quarter was $581.1 million and revenue, net of subcontractor costs1, was $437.1 million, each down 10% compared to the prior year. The declines were primarily due to the decision to complete certain fixed-price construction activities and wind-down the Remediation and Construction Management (“RCM”) segment. Op