Tetra Tech Wins $60 Million Water Resources Engineering Services Contract

Tetra Tech, Inc. (NASDAQ: TTEK) announced today that the County of Los Angeles has awarded the Company a $60 million, multiple-award engineering services contract to provide planning and technical support for their Water Resource Core Services Area projects, including flood hazard mitigation, water reuse and supply management, and drinking water well design.

Under the three-year contract, Tetra Tech will plan and design the capture, retention and conveyance of stormwater, surface water, and recycled water. Using state-of-the-art technology and sustainable design tools, Tetra Tech will develop integrated water management plans, conduct flood and storm surge studies, floodplain mapping, dam and levee studies, groundwater investigations, and feasibility studies for flood control projects. The Company also will prepare plans and specifications for the drilling of drinking water wells and provide technical oversight of well construction.

“Tetra Tech is pleased to continue its support to the County of Los Angeles for comprehensive water infrastructure planning and design,” said Dan Batrack, Tetra Tech Chairman and CEO. “Our technical expertise in water management will support Los Angeles in diversifying and protecting its water resources for its millions of residents.”

About Tetra Tech

Tetra Tech is a leading, global provider of consulting and engineering services. We are differentiated by Leading with Science® to provide innovative technical solutions to our clients. We support global commercial and government clients focused on water, environment, infrastructure, resource management, energy, and international development. With 17,000 associates worldwide, Tetra Tech provides clear solutions to complex problems. For more information about Tetra Tech, please visit tetratech.com, follow us on Twitter (@TetraTech), or like us on 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.