Great Lakes Dredge & Dock Corporation (NASDAQ: GLDD) today announced that it will release its financial results for the quarter and year ended December 31, 2011 on Tuesday, February 21, 2012 at 7:00 a.m. C.S.T. A conference call with the Company will be held the same day at 9:00 a.m. C.S.T. The call in number is 877-377-7553 and Conference ID is 46742727. The call can also be heard on the Company’s website, www.gldd.com under Events and Presentations on the investor relations page. The conference call will be available by replay for two weeks, by calling 800-585-8367 and providing Conference ID 46742727. A copy of the press release will be available on the Company’s website. Great Lakes Dredge & Dock Corporation is the largest provider of dredging services in the United States and the only U.S. dredging service provider with significant international operations. The Company is also one of the largest U.S. providers of commercial and industrial demolition services primarily in the Northeast. The Company owns a 50% interest in a marine sand mining operation in New Jersey that supplies sand and aggregate for road and building construction and a 50% interest in an environmental service operation with the ability to remediate contaminated soil and dredged sediment treatment. Great Lakes employs more than 150 degreed engineers, most specializing in civil and mechanical engineering, which contributes to its 121-year history of never failing to complete a marine project. Great Lakes has a disciplined training program for engineers that ensures experienced-based performance as they advance through Company operations. Great Lakes owns the largest and most diverse fleet in the U.S. industry, comprised of over 200 specialized vessels.