Tetra Tech, Inc. (NASDAQ: TTEK), a leading provider of high-end consulting and engineering services, announced today that the U.S. Army Corps of Engineers (USACE), Walla Walla District, selected Tetra Tech for a $34 million, multiple-award contract to provide architectural and engineering (A-E) design services for civil works infrastructure including flood risk management, inland navigation, hydroelectric power generation, and aquatic ecosystem restoration.

Under the seven-year contract, Tetra Tech engineers and scientists will perform advanced computer modeling and prepare plans and specifications for sustainable and resilient navigation and water control structures, such as dams, spillways, channels, and navigation lock features. Tetra Tech’s engineers and fisheries biologists will optimize water resources infrastructure design to facilitate migratory fish passage and the restoration of other vital ecosystems.

“The USACE Walla Walla District has been providing sustainably designed hydropower generation and flood risk management for 75 years,” said Dan Batrack, Tetra Tech Chairman and CEO. “We look forward to using our Leading with Science^® approach to design innovative solutions that continue to improve critical water resources infrastructure, protect aquatic life, and restore the surrounding riverine environment.”

About Tetra Tech

Tetra Tech is a leading provider of high-end consulting and engineering services for projects worldwide. With 27,000 employees working together, Tetra Tech provides clear solutions to complex problems in water, environment, sustainable infrastructure, renewable energy, and international development. We are Leading with Science^® to provide sustainable and resilient solutions for our clients. For more information about Tetra Tech, please visit tetratech.com or follow us on LinkedIn, Twitter, and Facebook.

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 Form 10-Q filings with the Securities and Exchange Commission.

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