Tetra Tech, Inc. (NASDAQ: TTEK) announced today it has been awarded a five-year, $23.6 million single-award contract with the U.S. Navy to assess and mitigate environmental impacts from expanded training grounds at the Marine Corps Air Ground Combat Center (MCAGCC) in Twentynine Palms, California.

MCAGCC is currently home to one of the largest military training areas in the nation and is located in the high desert region of the Mojave Desert. Through a combination of field surveys and data analysis, Tetra Tech will assess the density, health, and habitat structure of federally-threatened species and collaborate with the U.S. Navy, the Natural Resources division at MCAGCC, and the U.S. Fish and Wildlife Service to implement mitigation and monitoring strategies.

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 14,000 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.