New Ticker Symbol Is 'WNG' BOISE, Idaho, March 27 /PRNewswire-FirstCall/ -- Washington Group International (NYSE:WNG), a leading international engineering, construction, and management company, announced, effective today, that it has transferred its common stock listing to the New York Stock Exchange under the symbol "WNG." (Logo: http://www.newscom.com/cgi-bin/prnh/20070327/LATU054LOGO ) In honor of the occasion, Chairman Dennis Washington and President and Chief Executive Officer Stephen G. Hanks will ring The Closing Bell(SM) of the NYSE. In connection with the move, the company is holding an investor conference and webcast from 9 a.m. to noon Eastern Time today. More information about the investor conference is available on the investor relations section of http://www.wgint.com/. Washington Group International (NYSE:WNG) provides the talent, innovation, and proven performance to deliver integrated engineering, construction, and management solutions for businesses and governments worldwide. Headquartered in Boise, Idaho, with more than $3 billion in annual revenue, the company has approximately 25,000 people at work around the world providing solutions in power, environmental management, defense, oil and gas processing, mining, industrial facilities, transportation and water resources. For more information, visit http://www.wgint.com/. PHOTO/VIDEO: Photos available via Associated Press/New York (212.621.1902), Reuters America (646.223.6285) and Bloomberg Photo (212-617-3420). The Closing Bell(SM) (starting at 3:55 p.m.) feed is available via fiber line at Ascent media #1630. WEBCAST: A live webcast of The Closing Bell (beginning at 3:55 p.m.) will be available on the homepage of nyse.com. http://www.newscom.com/cgi-bin/prnh/20070327/LATU054LOGO DATASOURCE: Washington Group International CONTACT: Media, Laurie Spiegelberg, +1-208-386-5255, or Investors, Earl Ward, +1-208-386-5698, both of Washington Group International Web site: http://www.wgint.com/

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