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- S-4 Registration of securities issued in business combination transactions
- 3.4 Certificate of Formation of Great Lakes Dredge & Dock Company, LLC
- 3.5 Limited Liability Company Agreement
- 3.6 Certificate of Incorporation of Dawson Marine Company
- 3.7 By-laws of Dawson Marine Company
- 3.8 Certificate of Incorporation of Great Lakes Caribbean Dredging, Inc.
- 3.9 By-laws of Great Lakes Caribbean Dredging, Inc.
- 3.10 Certificate of Incorporation of Nasdi Holdings Corporation
- 3.11 Bylaws of Nasdi Holdings Corporation
- 3.12 Certificate of Incorporation of Fifty-three Dredging Corporation
- 3.13 Bylaws of Fifty-three Dredging Corporation
- 3.14 Certificate of Conversion and Certificate of Formation of Nasdi, LLC
- 5.1 Opinion of Neal, Gerber & Eisenberg LLP
- 12.1 Ratio of Earnings to Fixed Charges
- 23.1 Consent of Deloitte & Touche LLP
- 23.2 Consent of Cpa Associates PC.
- 25.1 Statement of Eligibility on Form T-1
- 99.1 Letter of Transmittal
- 99.2 Form of Notice of Guaranteed Delivery
- 99.3 Form of Letter to Clients
- 99.4 Form of Letter to Brokers, Dealers, Commercial Banks, Trust Companies
- 7 Aug 15 Registration of securities issued in business combination transactions
- 2 Aug 11 Registration of securities issued in business combination transactions (amended)
- 28 Jul 11 Registration of securities issued in business combination transactions (amended)
- 21 Jul 11 Registration of securities issued in business combination transactions
- 7 May 04 Registration of securities issued in business combination transactions (amended)
- 31 Mar 04 Registration of securities issued in business combination transactions
- 9 Oct 01 Registration of securities issued in business combination transactions (amended)
Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in this Registration Statement on Form S-4 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 appearing in the Current Report on Form 8-K of Great Lakes Dredge & Dock Corporation and subsidiaries filed on July 21, 2011, and our report dated March 14, 2011, relating to the effectiveness of the Great Lakes Dredge & Dock Corporation and subsidiaries’ internal control over financial reporting, appearing in the Annual Report on Form 10-K of Great Lakes Dredge & Dock Corporation for the year ended December 31, 2010, and to the reference to us under the heading “Experts” in the Prospectus, which is part of this Registration Statement.
/s/ Deloitte & Touche LLP
Chicago, Illinois
July 21, 2011