Great Lakes Dredge & Dock CORP - FORM 8-K - EX-23.1 - CONSENT OF DELOITTE & TOUCHE LLP - July 21, 2011

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file filename
8-K - FORM 8-K - Great Lakes Dredge & Dock CORPd8k.htm
EX-99.6 - UNAUDITED PRO FORMA CONDENSED COMBINED STATEMENT OF OPERATIONS - Great Lakes Dredge & Dock CORPdex996.htm
EX-99.4 - CONSOLIDATED FINANCIAL STATEMENTS - Great Lakes Dredge & Dock CORPdex994.htm
EX-99.3 - FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA - Great Lakes Dredge & Dock CORPdex993.htm
EX-99.5 - UNAUDUTED CONSOLIDATED FINANCIALS STATEMENTS - Great Lakes Dredge & Dock CORPdex995.htm
EX-99.1 - SELECTED FINANCIAL DATA - Great Lakes Dredge & Dock CORPdex991.htm
EX-99.2 - MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITIONS - Great Lakes Dredge & Dock CORPdex992.htm

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-153207 on Form S-3 and Registration Statement No. 333-150067 on Form S-8 of our report dated March 14, 2011 (July 21, 2011 as to Note 22), relating to the consolidated financial statements and financial statement schedule of Great Lakes Dredge & Dock Corporation and subsidiaries as of December 31, 2010 and 2009 and for each of the three years in the period ended December 31, 2010, appearing in this Current Report on Form 8-K of Great Lakes Dredge & Dock Corporation filed on July 21, 2011.

/s/ Deloitte & Touche LLP

Chicago, Illinois

July 21, 2011

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