Tetra Tech Awarded USACE Programs Valued at $20 Million

Tetra Tech, Inc. (NASDAQ: TTEK) announced today that it has recently been awarded new engineering design and environmental programs with the U.S. Army Corps of Engineers (USACE) valued at up to $20 million.

With the USACE Huntington District, Tetra Tech was awarded two contracts for water resources planning services and architect-engineering services in the Ohio and Great Lakes Divisions. Together, these contracts are valued at up to $10 million over the next five years.

Tetra Tech was also recently awarded a five-year, $10 million environmental support program with the USACE Mobile District, South Atlantic Division. This indefinite delivery contract covers a broad scope of architect-engineering services for U.S. military, civilian, and federal agencies worldwide, including services to support environmental compliance, remedial investigation and design, and water treatment programs.

About Tetra Tech (www.tetratech.com)

Tetra Tech is a leading provider of consulting, engineering, program management, construction, and technical services addressing the resource management and infrastructure markets. The Company supports government and commercial clients by providing innovative solutions focused on water, the environment, and energy. With more than 10,000 employees 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.