PASADENA, Calif.--(BUSINESS WIRE)--Tetra Tech, Inc. (NASDAQ: TTEK) announced today that the U.S. Agency for International Development (USAID) has awarded the Company a $49 million single-award contract to promote climate-resilient communities and protect biodiversity in West Africa. West African countries are particularly vulnerable to the effects of urbanization, overfishing, and increased risk of floods in coastal areas. The region’s inland forests are also threatened by conversion to agricul