Business description of Great-Lakes-Dredge--Dock-Corporation from last 10-k form

/S/ JONATHAN W. BERGER

Jonathan W. Berger

Chief Executive

Officer and Director

/S/ BRUCE J. BIEMECK

Bruce J. Biemeck

President,

Chief Financial Officer and Director

March 9, 2012

GREAT LAKES DREDGE & DOCK CORPORATION
By:  

/S/    BRUCE J. BIEMECK        

  Bruce J. Biemeck
  President and Chief Financial Officer
Date: March 9, 2012