PASADENA, Calif.--(BUSINESS WIRE)-- #ladwp--Tetra Tech, Inc. (NASDAQ: TTEK), a leading provider of high-end consulting and engineering services in water, environment, and sustainable infrastructure, announced today that the Los Angeles Department of Water and Power (LADWP) has selected Tetra Tech for a 5-year, $15 million, multiple-award contract to provide high-end engineering design and technical services for the Owens Lake Dust Mitigation Program, the largest dust mitigation and control progr