Tetra Tech, Inc. (NASDAQ: TTEK) announced today that it has been awarded a $74 million contract principally financed by the United States Export-Import bank for the Sri Lanka National Water Supply and Drainage Board. Tetra Tech will design and oversee the completion of a new water supply treatment plant, including storage tanks, pumping stations, a dam and impoundment reservoir, water intake structures, and transmission and distribution pipelines for the city of Badulla and surrounding communities of Ella and Haliela. Tetra Tech will also rehabilitate two existing treatment plants during the three and one-half year contract period. “Tetra Tech is proud to support the government of Sri Lanka in this important effort to bring safe drinking water to thousands of people,” said Dan Batrack, Tetra Tech’s Chairman and CEO. Once in place, the water supply system will help the government of Sri Lanka to realize its objective of providing safe drinking water to 85 percent of the population, in line with the United Nations Millennium Development goals. About Tetra Tech ( www.tetratech.com) Tetra Tech is a leading provider of consulting, engineering, program management, construction management, and technical services. The Company supports government and commercial clients by providing innovative solutions to complex problems focused on water, environment, energy, infrastructure, and natural resources. With more than 14,000 staff worldwide, Tetra Tech’s capabilities span the entire project life cycle. Any statements made in this release that are not based on historical fact are forward-looking statements. Any forward-looking statements made in this release represent management’s best judgment as to what may occur in the future. However, Tetra Tech’s actual outcome and results are not guaranteed and are subject to certain risks, uncertainties and assumptions ("Future Factors"), and may differ materially from what is expressed. For a description of Future Factors that could cause actual results to differ materially from such forward-looking statements, see the discussion under the section "Risk Factors" included in the Company’s Form 10-K and 10-Q filings with the Securities and Exchange Commission.