Attached files

file filename
10-K/A - 10-K/A - Great Lakes Dredge & Dock CORPd817806d10ka.htm
EX-99.2 - EX-99.2 - Great Lakes Dredge & Dock CORPd817806dex992.htm
EX-99.3 - EX-99.3 - Great Lakes Dredge & Dock CORPd817806dex993.htm
EX-32.3 - EX-32.3 - Great Lakes Dredge & Dock CORPd817806dex323.htm
EX-31.3 - EX-31.3 - Great Lakes Dredge & Dock CORPd817806dex313.htm
EX-99.1 - EX-99.1 - Great Lakes Dredge & Dock CORPd817806dex991.htm
EX-32.4 - EX-32.4 - Great Lakes Dredge & Dock CORPd817806dex324.htm
EX-23.2 - EX-23.2 - Great Lakes Dredge & Dock CORPd817806dex232.htm
EX-31.4 - EX-31.4 - Great Lakes Dredge & Dock CORPd817806dex314.htm

Exhibit 23.3

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 Nos. 333-150067 and 333-185350 on Form S-8 of our reports dated March 27, 2015, relating to the financial statements of Amboy Aggregates Joint Venture and Subsidiaries and Lower Main Street Development, LLC (A Limited Liability Company), appearing in the Annual Report on Form 10-K/A of Great Lakes Dredge & Dock Corporation for the year ended December 31, 2014.

/s/ WithumSmith+Brown. PC

New Brunswick, NJ

March 27, 2015