0001193125-13-134675 Sample Contracts

THIRD AMENDMENT TO INTERNATIONAL LETTER OF CREDIT AGREEMENT

International Letter of Credit Agreement • March 29th, 2013 • Great Lakes Dredge & Dock CORP • Heavy construction other than bldg const - contractors • New York

• Contract Type
  International Letter of Credit Agreement
• Filed
  March 29th, 2013
• Company
  Great Lakes Dredge & Dock CORP
• Industry
  Heavy construction other than bldg const - contractors
• Jurisdiction
  New York

LENDER-SURETY PRIORITY AGREEMENT

Lender-Surety Priority Agreement • March 29th, 2013 • Great Lakes Dredge & Dock CORP • Heavy construction other than bldg const - contractors • New York

• Contract Type
  Lender-Surety Priority Agreement
• Filed
  March 29th, 2013
• Company
  Great Lakes Dredge & Dock CORP
• Industry
  Heavy construction other than bldg const - contractors
• Jurisdiction
  New York

SECOND SUPPLEMENTAL INDENTURE

Supplemental Indenture • March 29th, 2013 • Great Lakes Dredge & Dock CORP • Heavy construction other than bldg const - contractors • New York

• Contract Type
  Supplemental Indenture
• Filed
  March 29th, 2013
• Company
  Great Lakes Dredge & Dock CORP
• Industry
  Heavy construction other than bldg const - contractors
• Jurisdiction
  New York

SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of January 15, 2013, among Terra Contracting Services, LLC, a Delaware limited liability company (the “New Guarantor”), a subsidiary of Great Lakes Dredge & Dock Corporation, as issuer (the “Company”), the Company, the existing Guarantors, and Wells Fargo Bank, National Association, as trustee.

Agreement of Indemnity

Indemnification & Liability • March 29th, 2013 • Great Lakes Dredge & Dock CORP • Heavy construction other than bldg const - contractors • New York

• Contract Type
  Indemnification & Liability
• Filed
  March 29th, 2013
• Company
  Great Lakes Dredge & Dock CORP
• Industry
  Heavy construction other than bldg const - contractors
• Jurisdiction
  New York

THIS AGREEMENT of Indemnity, made and entered into this Seventh day of September, 2011 by GREAT LAKES DREDGE & DOCK CORPORATION, GREAT LAKES DREDGE & DOCK COMPANY, LLC, LYDON DREDGING & CONSTRUCTION COMPANY, LTD., FIFTY-THREE DREDGING CORPORATION, DAWSON MARINE SERVICES COMPANY, GREAT LAKES DREDGE & DOCK ENVIRONMENTAL, INC. f/k/a GREAT LAKES CARIBBEAN DREDGING, INC., NASDI, LLC, NASDI HOLDINGS CORPORATION, YANKEE ENVIRONMENTAL SERVICES, LLC, GREAT LAKES DREDGE & DOCK (BAHAMAS) LTD., each individually and collectively “Contractor,” and GREAT LAKES DREDGE & DOCK CORPORATION, GREAT LAKES DREDGE & DOCK COMPANY, LLC, LYDON DREDGING & CONSTRUCTION COMPANY, LTD., FIFTY-THREE DREDGING CORPORATION, DAWSON MARINE SERVICES COMPANY, GREAT LAKES DREDGE & DOCK ENVIRONMENTAL, INC. f/k/a GREAT LAKES CARIBBEAN DREDGING, INC., NASDI, LLC, NASDI HOLDINGS CORPORATION, YANKEE ENVIRONMENTAL SERVICES, LLC and GREAT LAKES DREDGE & DOCK (BAHAMAS) LTD., each individually and collectively “Indemnitors,” and ZURI