GLDD to present at the 7th Annual D A Davidson & Co Engineering & Construction Conference

Company News – September 16, 2008

Great Lakes Dredge & Dock Corporation (NASDAQ:GLDD) has announced that it will be presenting at the 7th Annual D A Davidson & Co Engineering and Construction Conference on September 18th, 2008.

The presentation is scheduled to begin at 1.50pm (ET)/12:50pm (CT).

A live webcast of the presentation will be available on the Investor Relations section of the company’s website at

The webcast and accompanying slide presentation will be archived on the website within 24 hours and will be available for at least two weeks.

Great Lakes Dredge & Dock Corporation is the largest provider of dredging services in the US, and the he only US dredging company with significant international operations, averaging 23 per cent of its dredging revenues over the last three years.

The company is also one of the largest US providers of commercial and industrial demolition services.

GLDD also owns a 50 per cent interest in a marine sand mining operation in New Jersey which supplies sand and aggregate used for road and building construction.

The company owns the largest and most diverse fleet in the US industry, comprising more than 180 specialized vessels.