 PASADENA, Calif.--BUSINESS WIRE--Tetra Tech, Inc. NASDAQ: TTEK, a leading provider of high-end consulting and engineering services, announced today that the U.S. Agency for International Development USAID awarded the Company a five-year, 25 million, single-award contract to support the Government of Tanzania in expanding and sustaining the delivery and management of water, sanitation, and hygiene WASH services in urban and rural settings. Through the USAID Tanzania Water and Sanitation 