Great Lakes Dredge & Dock Corporation Schedules Announcement for 2012 Third Quarter Results

  Great Lakes Dredge & Dock Corporation Schedules Announcement for 2012 Third
  Quarter Results

Business Wire

OAK BROOK, Ill. -- October 31, 2012

Great Lakes Dredge & Dock Corporation (NASDAQ: GLDD) today announced that it
will release its financial results for the three and nine months ended
September 30, 2012 on Tuesday, November 6, 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 44839922. The
conference call will be available by replay until Friday, November 9, 2012, by
calling 800-585-8367 and providing Conference ID 44839922. The live call and
replay can also be heard on the Company’s website,, under Events
& Presentations on the investor relations page. 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 122-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.


Great Lakes Dredge & Dock Corporation
Katie Hayes, Director of Investor Relations, 630-574-3012
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