Tetra Tech, Inc. (NASDAQ: TTEK) announced today that it has been awarded a $700 million contract to provide technical services to the U.S. Agency for International Development (USAID) in supporting sustainable, long-term management of natural resources through the Restoring the Environment through Prosperity, Livelihoods and Conserving Ecosystems (REPLACE) program. This is a multiple-award indefinite delivery indefinite quantity contract (IDIQ) and has a five-year period of performance. Under this contract, Tetra Tech will use integrated watershed management approaches to conserve natural resources and maintain key ecosystem goods and services, while ultimately enhancing the livelihoods and economic options of local communities. Tetra Tech will support USAID in addressing issues of biodiversity conservation and sustainable forestry, climate change adaptation and mitigation, as well as resource-based conflict prevention and resource-based policy reform. “Throughout our history, Tetra Tech has focused on solutions in the water and environment sectors,” said Dan Batrack, Tetra Tech’s Chairman and CEO. “We look forward to expanding our relationship with USAID to provide the broad range of services this contract requires.” 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.